RU2340405C1 - Method of flotation of copper-molybdenum ore - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method of flotation of copper-molybdenum ore incorporates crumbling of ore and bulk flotation of copper and molybdenum in alkali medium formed by lime. Bulk flotation is performed at presence of collector Aero-MX 3601 and a foaming agent. After operations of concentration and desorption at heating of pulp to 40-60°C with direct steam at presence of sulphureous sodium the concentrate is directed to molybdenum flotation at presence of collector Aero-MX 3601, thus producing molybdenum and copper concentrates.

EFFECT: upgraded efficiency and intensification of process of separation of copper-molybdenum ores.

2 dwg, 4 ex, 1 tbl

Description

The invention relates to mineral processing and can be used for flotation of copper-molybdenum ores.

A known method of enrichment of copper-molybdenum ores, including collective copper-molybdenum flotation in an alkaline environment created by lime. Collective concentrate is treated with oxygen at a temperature of 60-95 ° C, a pressure of 0.05-1.0 MPa and a pH of 11.0; selective flotation of copper-molybdenum concentrate with the release of molybdenum concentrate with the release of molybdenum in the foam product is carried out at pH 6.0-8.0 (RU Patent No. 2038859, CL B03D 1/02, 1990).

The disadvantage of this method is the use in the operation of desorption of oxygen - an expensive and scarce material and the need for increased pressure in the operation of desorption of the concentrate, which also significantly increases the cost of the selection operation.

The closest in technical essence and the achieved result to the proposed one is a method for the separation of copper-molybdenum ores, including ore grinding, collective flotation of copper and molybdenum in an alkaline environment created by lime (A. Abramov, A. Non-ferrous metal concentration technology, - M., Nedra , 1983, p.165-171 - prototype).

In the collective copper-molybdenum flotation cycle, kerosene and xanthogenate are used as a collector, and lime is used for pyrite depression. Before separation, the copper-molybdenum concentrate is concentrated by loading lime to pH 11.5, providing desorption and removal of a significant part of the collector from the surface of the minerals. Stirred for 4-6 hours with the treatment of the pulp with hot steam at a temperature close to boiling and aeration, then selective flotation is carried out (after diluting the pulp with water at pH 8.5-8.8) with the addition of hydrocarbon oil. At the same time, molybdenite is extracted into the foam product, and copper concentrate is obtained with the chamber product.

The disadvantage of this method is the long duration of the oxidation-heat treatment of the pulp and, as a result of this, significant energy consumption and relatively low productivity.

The technical result, the achievement of which the present technical solution is aimed, is to increase the efficiency and intensify the process of separation of copper-molybdenum ores.

The technical result indicated is that in the method of flotation of copper-molybdenum ores, including grinding of ore and collective flotation of copper and molybdenum in an alkaline environment created by lime, according to the invention, collective flotation is carried out in the presence of an Aero-MX 3601 collector and a blowing agent, then a collective concentrate flotation after thickening and desorption operations, in the presence of sodium sulfide, is directed to molybdenum flotation in the presence of the Aero-MX 3601 collector to obtain molybdenum and copper concentrate.

The experiments were carried out on a sample of copper-molybdenum ore containing 0.55% copper and 0.020% molybdenum, taken at the quarry of one of the copper-molybdenum plants.

Figure 1 shows a flow chart of the implementation of the proposed method of flotation of copper-molybdenum ores.

Figure 2 shows the technological scheme of the method of flotation of copper-molybdenum ores described in the prototype.

The method is as follows: after grinding the ore in an alkaline medium (pH9-11) created by lime, to a particle size of 55% class — 74 microns, copper-molybdenum flotation is carried out with the introduction of the Aero-MX 3601 collector and blowing agent. Collective copper-molybdenum concentrate thicken up to 35% tv. and sent to the operation of desorption of the collector with heating the pulp to 40-60 ° C with hot steam in the presence of sodium sulfide (consumption of 5-10 kg / t of product). After desorption, the product is sent to molybdenum flotation, where the Aero-MX 3601 collector is used as a collector. At the same time, a rough molybdenum concentrate is fed into the foam product, which enters the same purification cycle, and a conditioned copper concentrate is obtained with the chamber product.

Examples of specific implementation of the described method:

Permanent conditions:

shredding lime to pH 10.0 agitation MIBK 15 g / t desorption Na ₂ S 10 kg / t

Example 1 (by the method of the prototype).

The initial feed copper-porphyry ore is subjected to flotation processing according to the scheme of figure 2 with a reagent mode shown in constant conditions and in the table. In the desorption operation, the steaming temperature is 70 ° C.

Example 2 (by the proposed method).

The initial feed copper-porphyry ore is subjected to flotation processing according to the scheme of figure 1 with a reagent mode shown in constant conditions and in the table. In the operations of the main collective and molybdenum flotation, the collector Aero-MX 3601 is introduced. In the desorption operation, the steaming temperature is 40 ° C.

Example 3 (by the proposed method).

The initial feed copper-porphyry ore is subjected to flotation processing according to the scheme of figure 1 with a reagent mode shown in constant conditions and in the table. In the operations of the main collective and molybdenum flotation, the collector Aero-MX 3601 is introduced. In the desorption operation, the steaming temperature is 60 ° C.

Example 4 (by the proposed method).

The initial feed copper-porphyry ore is subjected to flotation processing according to the scheme of figure 1 with a reagent mode shown in constant conditions and in the table. In the operations of the main collective and molybdenum flotation, the collector Aero-MX 3601 is introduced. In the desorption operation, the steaming temperature is 50 ° C.

As the studies showed, only such a combination of flotation operations and the corresponding reagent modes allows the most efficient flotation of copper-molybdenum ores. When processing according to the proposed scheme, high-quality copper and molybdenum concentrates are obtained. Thus, to increase the intensity and efficiency of the flotation process of copper-molybdenum ores, it is necessary to use the Aero-MX 3601 collector, which makes it possible to increase copper recovery from 7 to 14%, and molybdenum by 15-22% in concentrates of the same name by eliminating the finishing flotation operation and, accordingly, lapping tails.

Summary indicators of the flotation of copper-molybdenum ores clearly showed that the use of the proposed method in comparison with the prototype allows you to:

- reduce the temperature of the oxidative heat treatment of the pulp, and as a result of this, reduce energy consumption;

- increase efficiency and intensify the process of separation of copper-molybdenum ores;

- increase the extraction of metals in the same concentrates.

No pp Product name Exit, % Me content,% Extraction Me,% Test conditions Cu Mo Cu Mo one Mo concentrate 6 refining 0.019 5.60 50,2 0.20 39.74 according to the prototype consumption of butyl xanthate 30 g / t
diesel fuel 500 g / t product Cu concentrate 1.82 24.05 0.12 82.59 9.10 Tails 1 95.5 0,07 0.01 12.61 39.79 Tails 2 2,661 0.92 0.10 4.60 11.37 Ore one hundred 0.53 0.024 100.00 100.00 2 Mo concentrate 4 purifications 0.024 3,50 50,2 0.16 60.24 according to the proposed method, the consumption of Aero MX 3601 in a collective cycle of 10 g / t
in the selection cycle 200 g / t Cu concentrate 2.05 24.05 0.09 93.02 9.23 Tails 97,926 0.04 0.01 6.82 30.54 Ore one hundred 0.53 0.02 100.00 100.00 3 Mo concentrate 4 purifications 0,026 3.40 50.06 0.17 61.98 according to the proposed method, the consumption of Aero MX 3601 in a collective cycle of 10 g / t
in the selection cycle 200 g / t Cu concentrate 2.03 24.10 0.1 94.08 9.67 Tails 97,944 0,03 0.01 5.75 28.35 Ore one hundred 0.52 0,021 100.00 100.00 four Mo concentrate 4 purifications 0,023 2.90 50.15 0.12 54.93 according to the proposed method, the consumption of Aero MX 3601 in a collective cycle of 10 g / t
in the selection cycle 200 g / t Cu concentrate 2.06 24.00 0.1 89.89 9.81 Tails 97,917 0.06 0.01 9.99 35.26 Ore one hundred 0.55 0,021 100.00 100.00

Claims (1)

A method of flotation of copper-molybdenum ores, including grinding ore and collective flotation of copper and molybdenum in an alkaline environment created by lime, characterized in that collective flotation is carried out in the presence of an Aero-MX 3601 collector and a blowing agent, then a collective flotation concentrate after thickening and desorption operations with by heating the pulp to 40-60 ° C with hot steam in the presence of sodium sulfide, they are directed to molybdenum flotation in the presence of the Aero-MX 3601 collector to obtain molybdenum and copper concentrate.

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