WO2024082415A1 - Sorting method for veinlet-disseminated paragenic ore of wolframite and scheelite - Google Patents

Abstract

The present invention provides a sorting method for veinlet-disseminated paragenic ore of wolframite and scheelite, which belongs to the technical field of ore dressing. In the present invention, a large amount of tailings are first discarded by means of a pre-selection and waste-ore-discarding operation, such that the amount of ore entering a subsequent ore grinding operation is reduced; and then the flotation of a sulfide ore and a further sorting treatment are performed, so as to achieve the recovery of a molybdenum concentrate, a copper concentrate and a tungsten concentrate. By using the method provided in the present invention for sorting the veinlet-disseminated paragenic ore of wolframite and scheelite, the development and utilization cost is low, and the economic benefit is high. The results of the embodiments show that when veinlet-disseminated paragenic ore of wolframite and scheelite with the grades of WO₃, Mo and Cu being 0.17%, 0.011% and 0.126% respectively is subjected to sorting in the present invention, the waste-ore-discarding rate of a combined pre-selection and waste-ore-discarding operation is 52.67%, the grade of WO₃ in the finally obtained tungsten concentrate is larger than 30%, and the recovery rate is close to 60%.

Description

A separation method for veinlet-disseminated black and white tungsten paragenetic ore

This application claims the priority of the Chinese patent application filed with the China Patent Office on October 19, 2022, with application number CN202211277392.7 and invention name “A method for separating fine-vein impregnated black and white tungsten symbiotic ore”, the entire contents of which are incorporated by reference in this application.

Technical Field

The invention relates to the technical field of ore dressing, and in particular to a method for separating veinlet-disseminated black and white tungsten paragenetic ore.

Background technique

In recent years, after long-term large-scale development and utilization of non-ferrous metal mineral resources, there are fewer and fewer rich ores that are easy to sort, and mineral resources are generally developing towards dilution, refinement and complexity, resulting in increasingly high costs for the development and utilization of mineral resources, and a decline in the economic benefits of related companies, or even losses.

The vein-line impregnation type black and white tungsten paragenesis ore refers to the minerals in which wolframite, scheelite, copper minerals, molybdenite and other metal minerals are mostly fine-grained and micro-grained and distributed between the vein grains in the form of scattered impregnation. The minerals in the vein-line impregnation type black and white tungsten paragenesis ore form a relatively complex mosaic relationship due to interlacing, filling and encapsulation. Moreover, with the increase of the degree of replacement, the replaced minerals often appear as fine residual output. This type of structural mineral is most obvious in the replacement of wolframite by scheelite. If conventional process flow is used to separate them, such as full grinding and full selection process, there is a problem of high development and utilization cost.

Summary of the invention

The purpose of the present invention is to provide a method for sorting fine-vein disseminated black and white tungsten paragenetic ore. The method provided by the present invention first discards a large amount of tailings through pre-selection and discarding operations, thereby reducing the amount of ore entering subsequent grinding operations, which is beneficial to significantly reduce the development and utilization cost of fine-vein disseminated black and white tungsten paragenetic ore and improve economic benefits.

In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

The present invention provides a method for separating veinlet-disseminated black and white tungsten paragenetic ore, comprising the following steps:

The raw ore of the vein-impregnated black and white tungsten paragenetic ore is crushed to a particle size of less than 60mm, and subjected to the first classification treatment to obtain -60+30mm particle size ore, -30+12mm particle size ore and -12mm particle size ore; the -60+30mm particle size ore and -30+12mm particle size ore are subjected to the first pre-selection and discarding to obtain the first coarse concentrate; the first coarse concentrate is combined with the -12mm particle size ore and then crushed to -5mm, and subjected to the second classification treatment to obtain -5+0.8mm particle size ore and -0.8mm particle size ore; the -5+0.8mm particle size ore is subjected to the second pre-selection and discarding to obtain the second coarse concentrate; the second coarse concentrate is combined with the -0.8mm particle size ore to obtain a qualified ore;

The qualified ore is subjected to grinding and sulfide ore flotation in sequence to obtain molybdenum concentrate, copper concentrate and sulfide ore flotation tailings. The sulfide ore flotation tailings are sorted to obtain tungsten concentrate.

Preferably, the equipment used for the first pre-selection and discarding of waste is an intelligent ore sorting machine, and the equipment used for the second pre-selection and discarding of waste is a heavy medium ore dressing equipment.

Preferably, the first ore material or the second ore material is obtained after the ore grinding;

The first mineral material is a -0.25 mm particle size mineral material;

The mineral material with a fineness of -0.074 mm in the second mineral material accounts for 45-60% of the total mass of the mineral material.

Preferably, when the first ore material is obtained after the grinding, the sulfide ore flotation comprises:

The first ore material is mixed with a sulfur-floating roughing agent to perform sulfur-floating roughing to obtain a first sulfur-floating roughing ore material and a second sulfur-floating roughing ore material;

The first floating sulfur roughing material is subjected to beneficiation to obtain beneficiated middlings and sulfide ores, and the beneficiated middlings are returned to the floating sulfur roughing; the sulfide ores are subjected to molybdenum-copper separation to obtain molybdenum concentrate and copper concentrate;

The second sulfur-floating roughing material is mixed with a scavenging agent for scavenging to obtain sulfide ore flotation tailings and scavenged ore, and the scavenged ore is returned to the sulfur-floating roughing material.

Preferably, the floating sulfur roughing agent includes butyl xanthate, kerosene and 2 ^# oil; the amount of butyl xanthate is 250-350 g/t, the amount of kerosene is 50-76 g/t, and the amount of 2 ^# oil is 11-17 g/t.

Preferably, the scavenging agent includes butyl xanthate, kerosene and 2 ^# oil; the amount of butyl xanthate is 120-180 g/t, the amount of kerosene is 25-38 g/t, and the amount of 2 ^# oil is 5.5-8.5 g/t.

Preferably, when the first ore material is obtained after the grinding, the method for obtaining tungsten concentrate by sorting the sulfide ore flotation tailings comprises the following steps:

Desludging the sulfide ore flotation tailings to obtain sediment and overflow;

The sediment is subjected to roughing and first cleaning in sequence to obtain a first tungsten concentrate and a first middling;

Grinding the first intermediate ore to a fineness of -0.076 mm, the ore material accounts for 70-80% of the total mass of the ore material, and then scavenging to obtain a second tungsten concentrate and a second intermediate ore;

The second intermediate ore is combined with the overflow to carry out black and white tungsten mixed flotation to obtain black and white tungsten mixed rough concentrate; the black and white tungsten mixed rough concentrate is subjected to second concentration to obtain a third tungsten concentrate and a third intermediate ore, and the third intermediate ore is returned to the black and white tungsten mixed flotation.

Preferably, the desludging device is a cyclone.

Preferably, the equipment used for the roughing process is a spiral chute, and the equipment used for the first fine selection process is a shaking table.

Preferably, the device used for the scanning is a shaking table.

Preferably, the equipment used for the second concentration is a centrifugal concentrator.

Preferably, when the first ore material is obtained after the grinding, the sulfide ore flotation tailings are sorted to obtain tungsten concentrate, the black and white tungsten mixed flotation includes:

The second intermediate ore, overflow and mixed flotation roughing agent are mixed to carry out black and white tungsten mixed flotation roughing to obtain a first black and white tungsten mixed rough concentrate and mixed flotation roughing ore;

The mixed flotation rougher ore is mixed with the first scavenging agent, and the first scavenging agent is carried out to obtain the second black and white tungsten mixed rough concentrate and the first scavenged ore;

The first scavenging ore is mixed with the second scavenging agent, and a second scavenging is performed to obtain a third black and white tungsten mixed coarse concentrate and a third tailings.

Preferably, the mixed flotation roughing reagent comprises sodium carbonate, water glass, aluminum sulfate, lead nitrate, TW-705, TP-1M and 2 ^# oil; the amount of sodium carbonate is 800-1200 g/t, the amount of water glass is 500-700 g/t, the amount of aluminum sulfate is 500-700 g/t, the amount of lead nitrate is 500-700 g/t, the amount of TW-705 is 720-1080 g/t, the amount of TP-1M is 160-240 g/t, and the amount of 2 ^# oil is 11-17 g/t.

Preferably, the first scavenging agent is TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is 360-540 g/t, the dosage of TP-1M is 80-120 g/t, and the dosage of 2 ^# oil is 5.5-8.5 g/t.

Preferably, the second screening agent is TW-705 and TP-1M; the dosage of TW-705 is 360-540 g/t, and the dosage of TP-1M is 80-120 g/t.

Preferably, when the second ore material is obtained after the grinding, the sulfide ore flotation is the same as the sulfide ore flotation performed on the first ore material obtained after the grinding.

Preferably, when the second ore material is obtained after the grinding, the method for obtaining tungsten concentrate by sorting the sulfide ore flotation tailings comprises the following steps:

The flotation tailings of the sulfide ore are subjected to mixed flotation of black and white tungsten to obtain a mixed coarse concentrate of black and white tungsten;

The mixed black and white tungsten rough concentrate is subjected to a first concentration to obtain a first tungsten concentrate and a first middling;

The first intermediate ore is subjected to the second concentration to obtain the second tungsten concentrate and the second intermediate ore, and the second intermediate ore is returned to the black and white tungsten mixed float.

Preferably, the equipment used in the first concentration is a shaking table, and the equipment used in the second concentration is a centrifugal concentrator.

Preferably, when the second ore material is obtained after the grinding, the sulfide ore flotation tailings are sorted to obtain tungsten concentrate, the black and white tungsten mixed flotation includes:

The sulfide ore flotation tailings are mixed with a tungsten flotation roughing agent to perform tungsten flotation roughing to obtain a first tungsten flotation roughing ore material and a second tungsten flotation roughing ore material;

The first tungsten flotation roughing material is subjected to the i-th concentration to obtain the i-th concentrated rough ore and the i-th concentrated intermediate ore, and the i-th concentrated intermediate ore is returned to the tungsten flotation roughing; the i-th concentrated rough ore is subjected to the ii-th concentration to obtain the black and white tungsten mixed rough concentrate and the ii-th concentrated intermediate ore, and the ii-th concentrated intermediate ore is returned to the i-th concentration;

The second tungsten flotation roughing material is mixed with the i-th scavenging agent, and the i-th scavenging is carried out to obtain the i-th scavenged ore and the i-th scavenged tailings, and the i-th scavenged ore is returned to the tungsten flotation roughing; the i-th scavenging tailings is mixed with the ii-th scavenging agent, and the ii-th scavenging is carried out to obtain the ii-th scavenged ore and the second tailings, and the ii-th scavenged ore is returned to the i-th scavenging.

Preferably, the tungsten flotation roughing reagents include sodium carbonate, water glass, aluminum sulfate, lead nitrate, TW-705, TP-1M and 2 ^# oil; the amount of sodium carbonate is 800-1200 g/t, the amount of water glass is 500-700 g/t, the amount of aluminum sulfate is 500-700 g/t, the amount of lead nitrate is 500-700 g/t, the amount of TW-705 is 500-700 g/t, the amount of TP-1M is 160-240 g/t, and the amount of 2 ^# oil is 11-17 g/t.

Preferably, the i-th screening agent is TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is 230-370 g/t, the dosage of TP-1M is 80-120 g/t, and the dosage of 2 ^# oil is 5.5-8.5 g/t.

Preferably, the second screening agent is TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is 230-370 g/t, the dosage of TP-1M is 80-120 g/t, and the dosage of 2 ^# oil is 5.5-8.5 g/t.

Preferably, the grade of WO ₃ in the veinlet-disseminated black and white tungsten paragenetic ore is 0.14-0.18%, the grade of Mo is 0.010-0.015%, and the grade of Cu is 0.12-0.13%.

The present invention provides a separation method for vein-disseminated black and white tungsten paragenetic ore, comprising the following steps: crushing the raw ore of vein-disseminated black and white tungsten paragenetic ore to a particle size of less than 60 mm, performing a first classification process to obtain -60+30 mm particle size ore materials, -30+12 mm particle size ore materials and -12 mm particle size ore materials; performing a first pre-selection and discarding process on the -60+30 mm particle size ore materials and the -30+12 mm particle size ore materials to obtain a first coarse concentrate; separating the first coarse concentrate from the -12 mm particle size ore materials; and separating the first coarse concentrate from the -12 mm particle size ore materials. After the m-size ore is combined, it is crushed to -5mm and subjected to a second classification process to obtain -5+0.8mm ore and -0.8mm ore; the -5+0.8mm ore is subjected to a second pre-selection and discarding process to obtain a second coarse concentrate; the second coarse concentrate is combined with the -0.8mm ore to obtain a qualified ore; the qualified ore is subjected to grinding and sulfide flotation in sequence to obtain molybdenum concentrate, copper concentrate and sulfide flotation tailings, and the sulfide flotation tailings are subjected to sorting process to obtain tungsten concentrate. The present invention first discards a large amount of tailings through pre-selection and discarding operations to reduce the amount of ore entering subsequent grinding operations, and then recovers molybdenum concentrate, copper concentrate and tungsten concentrate through sulfide flotation and further sorting processes. The method provided by the present invention is used to sort the vein-impregnated black and white tungsten paragenetic ore, with low development and utilization costs and high economic benefits. The results of the examples show that the present invention separates veinlet-disseminated black and white tungsten paragenetic ores with WO ₃ , Mo and Cu grades of 0.17%, 0.011% and 0.126% respectively, and the waste rate of the combined pre-selection waste disposal operation is 52.67%. The WO ₃ grade in the final tungsten concentrate is greater than 30%, and the recovery rate is close to 60%.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a process flow chart for separating veinlet-disseminated black and white tungsten paragenetic ore in Example 1;

FIG2 is a process flow chart of mixed floating of black and white tungsten in Example 1;

FIG3 is a process flow chart for separating veinlet-disseminated black and white tungsten paragenetic ore in Example 2;

FIG. 4 is a process flow chart of sulfide ore flotation in Example 1 and sulfide ore flotation and mixed flotation of black and white tungsten in Example 2.

Detailed ways

The present invention provides a method for separating veinlet-disseminated black and white tungsten paragenetic ore, comprising the following steps:

The raw ore of the vein-impregnated black and white tungsten paragenetic ore is crushed to a particle size of less than 60 mm, and a first classification process is performed to obtain -60+30 mm particle size ore, -30+12 mm particle size ore and -12 mm particle size ore; the -60+30 mm particle size ore and -30+12 mm particle size ore are subjected to a first pre-selection and discarding to obtain a first coarse concentrate; the first coarse concentrate is combined with the -12 mm particle size ore and then crushed to -5 mm, and a second classification process is performed to obtain -5+0.8 mm particle size ore and -0.8 mm particle size ore; the -5+0.8 mm particle size ore is subjected to a second pre-selection and discarding to obtain a second coarse concentrate; the second coarse concentrate is combined with the -0.8 mm particle size ore to obtain a qualified ore;

The qualified ore is subjected to grinding and sulfide ore flotation in sequence to obtain molybdenum concentrate, copper concentrate and sulfide ore flotation tailings. The sulfide ore flotation tailings are sorted to obtain tungsten concentrate.

The method provided by the present invention is used to sort the vein-impregnated black and white tungsten paragenetic ore. The vein-impregnated black and white tungsten paragenetic ore of the present invention is a poor, fine, and impure black and white tungsten paragenetic ore with low grade and is difficult to be ore-selected. In the present invention, the grade of WO ₃ in the vein-impregnated black and white tungsten paragenetic ore is preferably 0.14-0.18%, more preferably 0.15-0.17%; the grade of Mo is preferably 0.010-0.015%, more preferably 0.011%; the grade of Cu is preferably 0.12-0.13%, more preferably 0.126%. For the vein-impregnated black and white tungsten paragenetic ore, it is difficult to generate economic benefits by using conventional process flow to sort it. The method provided by the present invention first discards a large amount of tailings through pre-selection and discarding operations, reducing the amount of ore entering the subsequent grinding operation, which is conducive to significantly reducing the development and utilization cost of the vein-impregnated black and white tungsten paragenetic ore and improving economic benefits. The following is a detailed description of the method for sorting the vein-impregnated black and white tungsten paragenetic ore of the present invention.

The present invention crushes the raw ore of fine vein disseminated black and white tungsten paragenetic ore to a particle size of less than 60mm, and performs the first classification process to obtain -60+30mm particle size ore, -30+12mm particle size ore and -12mm particle size ore. The present invention specifically crushes the raw ore to a particle size of less than 60mm, and then performs the first classification process to obtain -60+30mm particle size ore, -30+12mm particle size ore and -12mm particle size ore. The present invention classifies the ore into the above three particle sizes, which is conducive to improving the sorting effect and increasing the pre-selection and waste rate; when an intelligent ore sorter is used for the first pre-selection and waste, it cannot sort the particle size below -12mm, and the experiment finds that the intelligent ore sorter requires the narrow particle size ore to be sorted for better effect. If the -60+12mm wide particle size ore is directly placed in the intelligent ore sorter for sorting, the sorting effect is poor.

The present invention performs a first pre-selection and discarding of the -60+30mm particle size ore material and the -30+12mm particle size ore material to obtain a first coarse concentrate. In the present invention, the first pre-selection and discarding also obtains tailings. In the present invention, the equipment used for the first pre-selection and discarding is specifically an intelligent ore sorter; the advantage of using an intelligent ore sorter for the first pre-selection and discarding is to achieve early discarding as much as possible, thereby reducing the subsequent ore sample processing cost.

The present invention combines the first coarse concentrate with the -12mm particle size ore and crushes them to -5mm, and performs a second classification process to obtain -5+0.8mm particle size ore and -0.8mm particle size ore. The present invention specifically combines the first coarse concentrate with the -12mm particle size ore and crushes them until the particle size reaches -5mm particle size, and then performs a second classification process to obtain -5+0.8mm particle size ore and -0.8mm particle size ore. The present invention classifies the ore into the above two particle sizes, which is conducive to the subsequent second pre-selection and discarding. When heavy medium beneficiation equipment is used for the second pre-selection and discarding, it is conducive to the recovery of heavy medium in heavy medium beneficiation.

The present invention performs a second pre-selection and discarding of the -5+0.8mm particle size ore material to obtain a second coarse concentrate; the second coarse concentrate is combined with the -0.8mm particle size ore material to obtain a qualified ore. In the present invention, the second pre-selection and discarding also obtain tailings; wherein the tailings obtained from the first pre-selection and discarding and the second pre-selection and discarding are combined and recorded as the first tailings. In the present invention, the equipment used for the second pre-selection and discarding is specifically heavy medium beneficiation equipment; in an embodiment of the present invention, the heavy medium beneficiation equipment is specifically a heavy medium concentrator; the present invention uses heavy medium concentrators for the second pre-selection and discarding, which can fill the particle size defects of the pre-selection and discarding of the intelligent ore sorting machine, reduce the lower limit of the particle size of the pre-selection and discarding, and improve the discarding rate of the pre-selection and discarding operation.

After obtaining the qualified ore, the present invention sequentially grinds and flots the qualified ore to obtain molybdenum concentrate, copper concentrate and sulfide flotation tailings, and the sulfide flotation tailings are sorted to obtain tungsten concentrate. In the present invention, the first ore or the second ore is obtained after grinding; the first ore is preferably a -0.25mm particle size ore; the ore with a fineness of -0.074mm in the second ore preferably accounts for 45-60% of the total mass of the ore, and more preferably 45-50%. The present invention preferably adopts different beneficiation processes according to the different particle sizes of the ore obtained after grinding, which are described in detail below.

In the present invention, when the first ore material is obtained after the grinding, the first ore material is subjected to sulfide ore flotation (referred to as the first sulfide ore flotation) to obtain molybdenum concentrate, copper concentrate and sulfide ore flotation tailings, and the sulfide ore flotation tailings are subjected to sorting treatment (referred to as the first sorting treatment) to obtain tungsten concentrate. The first sulfide ore flotation and the first sorting treatment are described in detail below.

In the present invention, the first sulfide ore flotation is preferably a one-roughing-sweeping-fine process (see the sulfide ore flotation process in FIG4 ), comprising the following steps:

The first ore material is mixed with a sulfur-floating roughing agent to perform sulfur-floating roughing to obtain a first sulfur-floating roughing ore material and a second sulfur-floating roughing ore material;

The first floating sulfur roughing material is subjected to beneficiation to obtain beneficiated middlings and sulfide ores, and the beneficiated middlings are returned to the floating sulfur roughing material; the sulfide ores are subjected to molybdenum-copper separation to obtain molybdenum concentrate and copper concentrate;

The second sulfur-floating roughing material is mixed with a scavenging agent for scavenging to obtain sulfide ore flotation tailings and scavenged ore, and the scavenged ore is returned to the sulfur-floating roughing material.

In the present invention, the floating sulfur roughing agent preferably includes butyl xanthate, kerosene and 2 ^# oil; the amount of butyl xanthate is preferably 250-350 g/t, more preferably 300 g/t; the amount of kerosene is preferably 50-76 g/t, more preferably 64 g/t; the amount of 2 ^# oil is preferably 11-17 g/t, more preferably 14 g/t. In the present invention, the floating sulfur roughing is specifically to add butyl xanthate and kerosene to the first ore for post-treatment for 3 minutes, and then add 2 ^# oil for treatment for 1 minute.

In the present invention, the scavenging agent preferably includes butyl xanthate, kerosene and 2 ^# oil; the amount of butyl xanthate is preferably 120-180 g/t, more preferably 150 g/t; the amount of kerosene is preferably 25-38 g/t, more preferably 32 g/t; the amount of 2 ^# oil is preferably 5.5-8.5 g/t, more preferably 7 g/t. In the present invention, the scavenging is specifically to add butyl xanthate and kerosene to the second sulfur-floating roughing material for post-treatment for 3 minutes, and then add 2 ^# oil for treatment for 1 minute.

In the present invention, the first sorting method (see FIG. 1 ) preferably comprises the following steps:

Desludging the sulfide ore flotation tailings to obtain sediment and overflow;

The sediment is subjected to roughing and first cleaning in sequence to obtain a first tungsten concentrate and a first middling;

Grinding the first intermediate ore to a fineness of -0.076 mm, the ore material accounts for 70-80% of the total mass of the ore material, and then scavenging to obtain a second tungsten concentrate and a second intermediate ore;

The second intermediate ore is combined with the overflow to carry out black and white tungsten mixed flotation to obtain black and white tungsten mixed rough concentrate; the black and white tungsten mixed rough concentrate is subjected to second concentration to obtain a third tungsten concentrate and a third intermediate ore, and the third intermediate ore is returned to the black and white tungsten mixed flotation.

The present invention desludging the sulfide ore flotation tailings to obtain sediment and overflow. In the present invention, the desludging device is specifically a cyclone; in the embodiment of the present invention, the cyclone is specifically a hydrocyclone. The present invention preferably obtains sediment and overflow by desludging, and then performs subsequent corresponding treatments on the two, and can improve the recovery rate by separating the mud and sand.

After obtaining the sediment, the present invention sequentially performs roughing and first concentration on the sediment to obtain a first tungsten concentrate and a first middling. The present invention first performs roughing on the sediment to obtain a tungsten rough concentrate and a second tailing; then performs a first concentration on the tungsten rough concentrate to obtain a first tungsten concentrate and a first middling. In the present invention, the equipment used for the roughing is specifically a spiral chute. The spiral chute can be used for roughing to directly discard the tailings, and the equipment occupies a small area, has no transmission parts, and is low in cost. In the present invention, the equipment used for the first concentration is specifically a shaking table.

After obtaining the first intermediate ore, the present invention grinds the first intermediate ore to a fineness of -0.076mm, which accounts for 70-80% of the total mass of the ore, and then performs scavenging to obtain a second tungsten concentrate and a second intermediate ore. In the present invention, it is preferred to grind the first intermediate ore to a fineness of -0.076mm, which accounts for 72% of the total mass of the ore. The present invention preferably grinds the first intermediate ore to the above-mentioned particle size, which can achieve monomer dissociation of tungsten minerals that have not been monomerized. In the present invention, the equipment used for the scavenging is specifically a shaking table.

After obtaining the second intermediate ore and the overflow, the present invention combines the second intermediate ore with the overflow and performs black and white tungsten mixed flotation (referred to as the first black and white tungsten mixed flotation) to obtain a black and white tungsten mixed rough concentrate; the black and white tungsten mixed rough concentrate is subjected to a second concentration to obtain a third tungsten concentrate and a third intermediate ore, and the third intermediate ore is returned to the first black and white tungsten mixed flotation. In the present invention, the second intermediate ore is combined with the overflow and performs black and white tungsten mixed flotation to obtain tailings, which are referred to as the third tailings. In the present invention, the equipment used in the second concentration is specifically a centrifugal concentrator. The use of a centrifugal concentrator for the second concentration can enhance the recovery of fine-grained tungsten and improve the recovery rate of tungsten. In the present invention, the first tungsten concentrate, the second tungsten concentrate and the third tungsten concentrate are combined into a total tungsten concentrate.

In the present invention, the first black and white tungsten mixed floating method (see FIG. 2 ) preferably comprises the following steps:

The second intermediate ore, overflow and mixed flotation roughing agent are mixed to carry out black and white tungsten mixed flotation roughing to obtain a first black and white tungsten mixed rough concentrate and mixed flotation roughing ore;

The mixed flotation rougher ore is mixed with the first scavenging agent, and the first scavenging agent is carried out to obtain the second black and white tungsten mixed rough concentrate and the first scavenged ore;

The first scavenging ore is mixed with the second scavenging agent, and a second scavenging is performed to obtain a third black and white tungsten mixed coarse concentrate and a third tailings.

In the present invention, the first black and white tungsten mixed rough concentrate, the second black and white tungsten mixed rough concentrate and the third black and white tungsten mixed rough concentrate are combined into the total black and white tungsten mixed rough concentrate.

In the present invention, the mixed flotation roughing agent preferably includes sodium carbonate, water glass, aluminum sulfate, lead nitrate, TW-705, TP-1M and 2 ^# oil; the dosage of the sodium carbonate is preferably 800-1200 g/t, more preferably 1000 g/t; the dosage of the water glass is preferably 500-700 g/t, more preferably 600 g/t; the dosage of the aluminum sulfate is preferably 500-700 g/t, more preferably 600 g/t; the dosage of the lead nitrate is preferably 500-700 g/t, more preferably 600 g/t; the dosage of the TW-705 is preferably 720-1080 g/t, more preferably 900 g/t; the dosage of the TP-1M is preferably 160-240 g/t, more preferably 200 g/t; the dosage of the 2 ^# oil is preferably 11-17 g/t, more preferably 14 g/t. In the present invention, the black and white tungsten mixed flotation roughing specifically comprises mixing the second intermediate ore with the overflow, and then sequentially adding sodium carbonate for post-treatment for 3 minutes, adding water glass and aluminum sulfate for post-treatment for 5 minutes, adding lead nitrate for post-treatment for 5 minutes, and adding TW-705, TP-1M and 2 ^# oil for post-treatment for 5 minutes.

In the present invention, the first scavenging agent is preferably TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is preferably 360-540 g/t, more preferably 450 g/t; the dosage of TP-1M is preferably 80-120 g/t, more preferably 100 g/t; the dosage of 2 ^# oil is preferably 5.5-8.5 g/t, more preferably 7 g/t. In the present invention, the first scavenging is preferably to mix the mixed flotation roughing ore with the first scavenging agent and then treat for 5 minutes.

In the present invention, the second scavenging agent is preferably TW-705 and TP-1M; the dosage of TW-705 is preferably 360-540 g/t, more preferably 450 g/t; the dosage of TP-1M is preferably 80-120 g/t, more preferably 100 g/t. In the present invention, the second scavenging is preferably to mix the mixed flotation roughing ore with the second scavenging agent and then treat for 5 minutes.

In the present invention, when the second ore material is obtained after the grinding, the second ore material is subjected to sulfide ore flotation (referred to as the second sulfide ore flotation) to obtain molybdenum concentrate, copper concentrate and sulfide ore flotation tailings, and the sulfide ore flotation tailings are subjected to sorting treatment (referred to as the second sorting treatment) to obtain tungsten concentrate. The second sulfide ore flotation and the second sorting treatment are described in detail below.

In the present invention, the second sulfide ore flotation method is preferably consistent with the first sulfide ore flotation method, which will not be described in detail herein.

In the present invention, the second sorting method (see FIG. 3 ) preferably comprises the following steps:

The sulfide ore flotation tailings are subjected to mixed flotation of black and white tungsten (referred to as the second mixed flotation of black and white tungsten) to obtain a mixed rough concentrate of black and white tungsten;

The mixed black and white tungsten rough concentrate is subjected to a first concentration to obtain a first tungsten concentrate and a first middling;

The first intermediate ore is subjected to the second concentration to obtain the second tungsten concentrate and the second intermediate ore, and the second intermediate ore is returned to the black and white tungsten mixed float.

In the present invention, the equipment used in the first concentration is a shaking table; the equipment used in the second concentration is a centrifugal concentrator. The centrifugal concentrator used in the present invention can enhance the recovery of fine-grained tungsten and improve the recovery rate of tungsten. In the present invention, the first tungsten concentrate and the second tungsten concentrate are combined into a total tungsten concentrate.

The present invention performs a second black and white tungsten mixed flotation on the sulfide ore flotation tailings to obtain a black and white tungsten mixed rough concentrate and a tailing, which is recorded as a second tailing. The second black and white tungsten mixed flotation method (see FIG. 4 ) preferably includes the following steps:

The sulfide ore flotation tailings are mixed with a tungsten flotation roughing agent to perform tungsten flotation roughing to obtain a first tungsten flotation roughing ore material and a second tungsten flotation roughing ore material;

The first tungsten flotation roughing material is subjected to the i-th concentration to obtain the i-th concentrated rough ore and the i-th concentrated intermediate ore, and the i-th concentrated intermediate ore is returned to the tungsten flotation roughing; the i-th concentrated rough ore is subjected to the ii-th concentration to obtain the black and white tungsten mixed rough concentrate and the ii-th concentrated intermediate ore, and the ii-th concentrated intermediate ore is returned to the i-th concentration;

The second tungsten flotation roughing material is mixed with the i-th scavenging agent, and the i-th scavenging is carried out to obtain the i-th scavenged ore and the i-th scavenged tailings, and the i-th scavenged ore is returned to the tungsten flotation roughing; the i-th scavenging tailings is mixed with the ii-th scavenging agent, and the ii-th scavenging is carried out to obtain the ii-th scavenged ore and the second tailings, and the ii-th scavenged ore is returned to the i-th scavenging.

In the present invention, the tungsten flotation roughing agent preferably includes sodium carbonate, water glass, aluminum sulfate, lead nitrate, TW-705, TP-1M and 2 ^# oil; the amount of sodium carbonate is preferably 800-1200 g/t, more preferably 1000 g/t; the amount of water glass is preferably 500-700 g/t, more preferably 600 g/t; the amount of aluminum sulfate is preferably 500-700 g/t, more preferably 600 g/t; the amount of lead nitrate is preferably 500-700 g/t, more preferably 600 g/t; the amount of TW-705 is preferably 500-700 g/t, more preferably 600 g/t; the amount of TP-1M is preferably 160-240 g/t, more preferably 200 g/t; the amount of 2 ^# oil is preferably 11-17 g/t, more preferably 14 g/t. In the present invention, the tungsten flotation roughing is specifically to add sodium carbonate to the sulfide ore flotation tailings for post-treatment for 3 minutes, add water glass and aluminum sulfate for post-treatment for 3 minutes, add lead nitrate for post-treatment for 3 minutes, and add TW-705, TP-1M and 2 ^# oil for post-treatment for 3 minutes.

In the present invention, the i-th selection and the ii-th selection are preferably blank selections.

In the present invention, the i-th scavenging agent is preferably TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is preferably 230-370 g/t, more preferably 300 g/t; the dosage of TP-1M is preferably 80-120 g/t, more preferably 100 g/t; the dosage of 2 ^# oil is preferably 5.5-8.5 g/t, more preferably 7 g/t. In the present invention, the i-th scavenging is preferably to mix the second tungsten flotation roughing material with the i-th scavenging agent and then treat for 3 minutes.

In the present invention, the second scavenging agent is preferably TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is preferably 230-370 g/t, more preferably 300 g/t; the dosage of TP-1M is preferably 80-120 g/t, more preferably 100 g/t; the dosage of 2 ^# oil is preferably 5.5-8.5 g/t, more preferably 7 g/t. In the present invention, the second scavenging is preferably to mix the first scavenging tailings with the second scavenging agent and then treat for 5 minutes.

The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Example 1

The veinlet-disseminated black and white tungsten paragenetic ore with WO ₃ , Mo and Cu grades of 0.17%, 0.011% and 0.126% respectively was sorted, as shown in Figures 1, 2 and 4, and the steps are as follows:

(1) The raw ore of the vein-impregnated black and white tungsten paragenetic ore is crushed to a particle size of less than 60 mm, and a first classification treatment is performed to obtain -60+30 mm particle size ore, -30+12 mm particle size ore and -12 mm particle size ore; the -60+30 mm particle size ore and -30+12 mm particle size ore are respectively subjected to a first pre-selection and discarding by an intelligent ore sorter to obtain a first coarse concentrate; the first coarse concentrate is combined with the -12 mm particle size ore and crushed to -5 mm, and a second classification treatment is performed to obtain -5+0.8 mm particle size ore and -0.8 mm particle size ore; the -5+0.8 mm particle size ore is subjected to a second pre-selection and discarding by a heavy medium concentrator to obtain a second coarse concentrate; the second coarse concentrate is combined with the -0.8 mm particle size ore to obtain a qualified ore; the tailings generated by the first pre-selection and discarding and the second pre-selection and discarding are combined and recorded as tailings 1;

(2) Grinding the qualified ore to obtain -0.25 mm particle size ore; flotation of the -0.25 mm particle size ore, specifically, adding 300 g/t butyl xanthate and 64 g/t kerosene to the -0.25 mm particle size ore, post-treating for 3 min, then adding 14 g/t 2 ^# oil to treat for 1 min (i.e., flotation sulfur roughing) to obtain a first flotation sulfur roughing ore and a second flotation sulfur roughing ore; concentrating the first flotation sulfur roughing ore to obtain a concentrated middling ore and a sulfide ore, and returning the concentrated middling ore to the flotation sulfur roughing; separating molybdenum and copper from the sulfide ore to obtain a molybdenum concentrate and a copper concentrate; adding 150 g/t butyl xanthate and 64 g/t kerosene to the second flotation sulfur roughing ore, post-treating for 3 min, then adding 7 g/t 2 ^# Oil treatment for 1 min (i.e. scavenging) to obtain sulfide ore flotation tailings and scavenged ore, and the scavenged ore is returned to the flotation sulfur roughing (specifically shown in the sulfide ore flotation process in Figure 4);

The sulfide ore flotation tailings are desludged by a hydrocyclone to obtain sediment and overflow; the sediment is roughly selected by a spiral chute to obtain a tungsten rough concentrate and tailings 2; the tungsten rough concentrate is first selected by a shaking table to obtain a concentrate 1 and a middling 1, and the middling 1 is ground to a fineness of -0.076 mm, which accounts for 72% of the total mass of the ore, and then swept by a shaking table to obtain a concentrate 2 and a middling 2;

The intermediate ore 2 is combined with the overflow to carry out mixed flotation of black and white tungsten. Specifically, the intermediate ore 2 is combined with the overflow, and 1000g/t sodium carbonate is added in sequence for post-treatment for 3min, 600g/t water glass and 600g/t aluminum sulfate are added for post-treatment for 5min, 600g/t lead nitrate is added for post-treatment for 5min, 900g/t TW-705, 200g/t TP-1M and 14g/t 2 ^# oil are added for post-treatment for 5min to obtain the first black and white tungsten mixed rough concentrate and mixed flotation rougher ore; 450g/t TW-705, 100g/t TP-1M and 7g/t 2# oil are added to the mixed flotation rougher ore. ^# Oil post-treatment for 5 minutes to obtain the second black and white tungsten mixed rough concentrate and the first scavenged ore; 450g/t TW-705 and 100g/t TP-1M are added to the first scavenged ore for post-treatment for 5 minutes to obtain the third black and white tungsten mixed rough concentrate and tailings 3 (as shown in Figure 2); the first black and white tungsten mixed rough concentrate, the second black and white tungsten mixed rough concentrate and the third black and white tungsten mixed rough concentrate are combined into the total black and white tungsten mixed rough concentrate;

The total black and white tungsten mixed rough concentrate is subjected to a second concentration by a centrifugal concentrator to obtain concentrate 3 and middlings 3, and the middlings 3 are returned to the black and white tungsten mixed flotation operation, and the concentrate 1, concentrate 2 and concentrate 3 are combined into the total tungsten concentrate.

This embodiment is aimed at sorting the above-mentioned veinlet-disseminated black and white tungsten paragenetic ore. First, an intelligent ore sorter + heavy medium concentrator are used to pre-select and discard waste, and the discard rate is 52.67%; then a sulfide ore flotation process is used to obtain molybdenum concentrate, copper concentrate and sulfide ore flotation tailings. When the sulfide ore flotation tailings are sorted, a gravity separation-flotation-gravity separation combined treatment process is adopted, that is, a spiral chute + shaking table is used to recover black and white tungsten (gravity separation process) for coarse particles, and a black and white tungsten mixed flotation (flotation process) + centrifugal concentrator is used to recover black and white tungsten (gravity separation process) for fine particles. The Mo grade in the molybdenum concentrate is 40.21%, and the recovery rate is 77.34%; the Cu grade in the copper concentrate is 28.79%, and the recovery rate is 61.18%; the _WO3 grade in the tungsten concentrate is 34.06%, and the recovery rate is 58.26%.

Example 2

The veinlet-disseminated black and white tungsten paragenetic ore with WO ₃ , Mo and Cu grades of 0.17%, 0.011% and 0.126% respectively was sorted, as shown in Figures 3 and 4, and the steps are as follows:

(1) Same as step (1) of Example 1;

(2) Grinding the qualified ore until the ore with a fineness of -0.074 mm accounts for 50% of the total mass of the ore, and then flotation of the sulfide ore is carried out, specifically, 300 g/t butyl xanthate and 64 g/t kerosene are added to the ore obtained after grinding, and then 14 g/t 2 ^# oil is added for post-treatment for 1 min (i.e., flotation sulfur roughing) to obtain a first flotation sulfur roughing ore and a second flotation sulfur roughing ore; the first flotation sulfur roughing ore is concentrating to obtain a concentrating middling ore and a sulfide ore, and the concentrating middling ore is returned to the flotation sulfur roughing; the sulfide ore is subjected to molybdenum-copper separation to obtain a molybdenum concentrate and a copper concentrate; 150 g/t butyl xanthate and 64 g/t kerosene are added to the second flotation sulfur roughing ore, and then 7 g/t 2 ^# oil is added for treatment for 1 min (i.e., scavenging) to obtain a sulfide ore flotation tailing and scavenged middling ore, and the scavenged middling ore is returned to the flotation sulfur roughing;

The sulfide ore flotation tailings are subjected to black and white tungsten mixed flotation, specifically, 1000g/t sodium carbonate is added to the sulfide ore flotation tailings for post-treatment for 3 minutes, 600g/t water glass and 600g/t aluminum sulfate are added for post-treatment for 3 minutes, 600g/t lead nitrate is added for post-treatment for 3 minutes, 600g/t TW-705, 200g/t TP-1M and 14g/t 2 ^#Oil post-treatment for 3min (i.e., tungsten flotation roughing) to obtain the first tungsten flotation roughing material and the second tungsten flotation roughing material; the first tungsten flotation roughing material is subjected to blank i-th concentration to obtain i-th concentrated rough ore and i-th concentrated medium ore, and the i-th concentrated medium ore is returned to the tungsten flotation roughing; the i-th concentrated rough ore is subjected to blank ii-th concentration to obtain black and white tungsten mixed rough concentrate and ii-th concentrated medium ore, and the ii-th concentrated medium ore is returned to the i-th concentration; 300g/tTW-705, 100g/tTP-1M and 7g/t2 are added to the second tungsten flotation roughing material ^#Oil post-treatment for 3min (i.e., i-th scavenging) to obtain i-th scavenged ore and i-th scavenged tailings, and the i-th scavenged ore is returned to the tungsten flotation roughing; 300g/tTW-705, 100g/tTP-1M and 7g/t2 are added to the i-th scavenging tailings ^#Oil post-processing for 3 minutes (i.e., the second scavenging) to obtain the second scavenging ore and tailings 2, and the second scavenging ore is returned to the first scavenging (as shown in FIG. 4 );

The black and white tungsten mixed rough concentrate is concentrated by a shaking table to obtain concentrate 1 and middling 1, and the middling 1 is further concentrated by a centrifugal concentrator to obtain concentrate 2 and middling 2, and the middling 2 is returned to the black and white tungsten mixed flotation operation; wherein, the concentrate 1 and concentrate 2 are combined into tungsten concentrate.

This embodiment is aimed at sorting the above-mentioned veinlet-disseminated black and white tungsten paragenetic ore. First, an intelligent ore sorter + heavy medium beneficiation is used for joint pre-selection and discarding, and the discarding rate is 52.67%; then a sulfide ore flotation process is used to obtain molybdenum concentrate, copper concentrate and sulfide ore flotation tailings. When the sulfide ore flotation tailings are sorted, a flotation-gravity separation combined treatment process is adopted, that is, a beneficiation process of black and white tungsten mixed flotation (flotation process), black and white tungsten mixed rough concentrate shaking table + centrifugal beneficiation machine selection (gravity separation process), wherein the Mo grade in the molybdenum concentrate is 40.21%, and the recovery rate is 77.34%; the Cu grade in the copper concentrate is 28.79%, and the recovery rate is 61.18%; the _WO3 grade in the tungsten concentrate is 30.29%, and the recovery rate is 59.35%.

The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims (23)

A method for separating veinlet-disseminated black and white tungsten paragenetic ore comprises the following steps: The raw ore of the vein-impregnated black and white tungsten paragenetic ore is crushed to a particle size of less than 60 mm, and a first classification process is performed to obtain -60+30 mm particle size ore, -30+12 mm particle size ore and -12 mm particle size ore; the -60+30 mm particle size ore and -30+12 mm particle size ore are subjected to a first pre-selection and discarding to obtain a first coarse concentrate; the first coarse concentrate is combined with the -12 mm particle size ore and then crushed to -5 mm, and a second classification process is performed to obtain -5+0.8 mm particle size ore and -0.8 mm particle size ore; the -5+0.8 mm particle size ore is subjected to a second pre-selection and discarding to obtain a second coarse concentrate; the second coarse concentrate is combined with the -0.8 mm particle size ore to obtain a qualified ore; The qualified ore is subjected to grinding and sulfide ore flotation in sequence to obtain molybdenum concentrate, copper concentrate and sulfide ore flotation tailings. The sulfide ore flotation tailings are sorted to obtain tungsten concentrate. The sorting method according to claim 1 is characterized in that the equipment used for the first pre-selection and discarding is an intelligent ore sorting machine, and the equipment used for the second pre-selection and discarding is a heavy medium ore dressing equipment. The separation method according to claim 1 or 2, characterized in that the first ore material or the second ore material is obtained after the ore grinding; The first mineral material is a -0.25 mm particle size mineral material; The mineral material with a fineness of -0.074 mm in the second mineral material accounts for 45-60% of the total mass of the mineral material. The separation method according to claim 3 is characterized in that when the first ore material is obtained after the grinding, the sulfide ore flotation comprises: The first ore material is mixed with a sulfur-floating roughing agent to perform sulfur-floating roughing to obtain a first sulfur-floating roughing ore material and a second sulfur-floating roughing ore material; The first floating sulfur roughing material is subjected to beneficiation to obtain beneficiated middlings and sulfide ores, and the beneficiated middlings are returned to the floating sulfur roughing; the sulfide ores are subjected to molybdenum-copper separation to obtain molybdenum concentrate and copper concentrate; The second sulfur-floating roughing material is mixed with a scavenging agent for scavenging to obtain sulfide ore flotation tailings and scavenged ore, and the scavenged ore is returned to the sulfur-floating roughing material. The separation method according to claim 4 is characterized in that the floating sulfur roughing agent includes butyl xanthate, kerosene and 2 ^# oil; the amount of butyl xanthate is 250-350 g/t, the amount of kerosene is 50-76 g/t, and the amount of 2 ^# oil is 11-17 g/t. The sorting method according to claim 4 is characterized in that the scavenging agents include butyl xanthate, kerosene and 2 ^# oil; the amount of butyl xanthate is 120-180 g/t, the amount of kerosene is 25-38 g/t, and the amount of 2 ^# oil is 5.5-8.5 g/t. The separation method according to claim 3 is characterized in that when the first ore material is obtained after the grinding, the method of obtaining tungsten concentrate by sorting the sulfide ore flotation tailings comprises the following steps: Desludging the sulfide ore flotation tailings to obtain sediment and overflow; The sediment is subjected to roughing and first cleaning in sequence to obtain a first tungsten concentrate and a first middling; Grinding the first intermediate ore to a fineness of -0.076 mm, the ore material accounts for 70-80% of the total mass of the ore material, and then scavenging to obtain a second tungsten concentrate and a second intermediate ore; The second intermediate ore is combined with the overflow to carry out black and white tungsten mixed flotation to obtain black and white tungsten mixed rough concentrate; the black and white tungsten mixed rough concentrate is subjected to second concentration to obtain a third tungsten concentrate and a third intermediate ore, and the third intermediate ore is returned to the black and white tungsten mixed flotation. The sorting method according to claim 7 is characterized in that the equipment used for desludging is a cyclone. The sorting method according to claim 7 is characterized in that the equipment used for the rough selection is a spiral chute, and the equipment used for the first fine selection is a shaking table. The sorting method according to claim 7 is characterized in that the equipment used for the scanning is a shaking table. The sorting method according to claim 7 is characterized in that the equipment used for the second concentration is a centrifugal concentrator. The separation method according to claim 7 is characterized in that the black and white tungsten mixed floatation comprises: The second intermediate ore, overflow and mixed flotation roughing agent are mixed to carry out black and white tungsten mixed flotation roughing to obtain a first black and white tungsten mixed rough concentrate and mixed flotation roughing ore; The mixed flotation rougher ore is mixed with the first scavenging agent, and the first scavenging agent is carried out to obtain the second black and white tungsten mixed rough concentrate and the first scavenged ore; The first scavenging ore is mixed with the second scavenging agent, and a second scavenging is performed to obtain a third black and white tungsten mixed coarse concentrate and a third tailings. The separation method according to claim 12 is characterized in that the mixed flotation roughing agent includes sodium carbonate, water glass, aluminum sulfate, lead nitrate, TW-705, TP-1M and 2 ^# oil; the amount of sodium carbonate is 800-1200g/t, the amount of water glass is 500-700g/t, the amount of aluminum sulfate is 500-700g/t, the amount of lead nitrate is 500-700g/t, the amount of TW-705 is 720-1080g/t, the amount of TP-1M is 160-240g/t, and the amount of 2 ^# oil is 11-17g/t. The sorting method according to claim 12 is characterized in that the first scavenging agent is TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is 360-540 g/t, the dosage of TP-1M is 80-120 g/t, and the dosage of 2 ^# oil is 5.5-8.5 g/t. The sorting method according to claim 12 is characterized in that the second scavenging agent is TW-705 and TP-1M; the dosage of TW-705 is 360-540 g/t, and the dosage of TP-1M is 80-120 g/t. The separation method according to claim 4 is characterized in that when the second ore material is obtained after the grinding, the sulfide ore flotation is the same as the sulfide ore flotation performed on the first ore material obtained after the grinding. The separation method according to claim 3 is characterized in that when the second ore material is obtained after the grinding, the method of obtaining tungsten concentrate by sorting the sulfide ore flotation tailings comprises the following steps: The flotation tailings of the sulfide ore are subjected to mixed flotation of black and white tungsten to obtain a mixed coarse concentrate of black and white tungsten; The mixed black and white tungsten rough concentrate is subjected to a first concentration to obtain a first tungsten concentrate and a first middling; The first intermediate ore is subjected to the second concentration to obtain the second tungsten concentrate and the second intermediate ore, and the second intermediate ore is returned to the black and white tungsten mixed float. The sorting method according to claim 17 is characterized in that the equipment used in the first concentration is a shaking table, and the equipment used in the second concentration is a centrifugal concentrator. The separation method according to claim 17, characterized in that the black and white tungsten mixed floatation comprises: The sulfide ore flotation tailings are mixed with a tungsten flotation roughing agent to perform tungsten flotation roughing to obtain a first tungsten flotation roughing ore material and a second tungsten flotation roughing ore material; The first flotation tungsten roughing material is subjected to the i-th concentration to obtain the i-th concentrated rough ore and the i-th concentrated medium ore, and the i-th concentrated medium ore is returned to the flotation tungsten roughing; the i-th concentrated rough ore is subjected to the ii-th concentration to obtain the black and white tungsten mixed rough concentrate and the ii-th concentrated medium ore, and the ii-th concentrated medium ore is returned to the i-th concentration; The second tungsten flotation roughing material is mixed with the i-th scavenging agent, and the i-th scavenging is carried out to obtain the i-th scavenged ore and the i-th scavenged tailings, and the i-th scavenged ore is returned to the tungsten flotation roughing; the i-th scavenging tailings is mixed with the ii-th scavenging agent, and the ii-th scavenging is carried out to obtain the ii-th scavenged ore and the second tailings, and the ii-th scavenged ore is returned to the i-th scavenging. The separation method according to claim 19 is characterized in that the tungsten flotation roughing agent includes sodium carbonate, water glass, aluminum sulfate, lead nitrate, TW-705, TP-1M and 2 ^# oil; the amount of sodium carbonate is 800-1200g/t, the amount of water glass is 500-700g/t, the amount of aluminum sulfate is 500-700g/t, the amount of lead nitrate is 500-700g/t, the amount of TW-705 is 500-700g/t, the amount of TP-1M is 160-240g/t, and the amount of 2 ^# oil is 11-17g/t. The sorting method according to claim 19 is characterized in that the i-th scavenging agent is TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is 230-370 g/t, the dosage of TP-1M is 80-120 g/t, and the dosage of 2 ^# oil is 5.5-8.5 g/t. The sorting method according to claim 19 is characterized in that the second scavenging agents are TW-705, TP-1M and 2 ^# oil; the dosage of TW-705 is 230-370 g/t, the dosage of TP-1M is 80-120 g/t, and the dosage of 2 ^# oil is 5.5-8.5 g/t. The separation method according to claim 1 is characterized in that the grade of _WO3 in the veinlet-disseminated black and white tungsten paragenetic ore is 0.14-0.18%, the grade of Mo is 0.010-0.015%, and the grade of Cu is 0.12-0.13%.

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