WO2019006889A1 - Double-region flotation method for copper-cobalt sulfide ore in industrial production - Google Patents

Abstract

The invention relates to a bizone flotation process for a copper-cobalt sulphide ore used in industrial production. The sorting process uses a flotation process flow, the flotation process using flotation in separate zones, which are divided into two zones, zone 1 being mainly used for the regulation of the concentrate index, and the zone 2 for the regulation of the recovery rate. The process provides high throughput recovery of both copper and cobalt elements in cobalt-copper sulphide ore in industrial production, using the bizone flotation method. , effectively overcomes the contradiction between the recovery rate and the quality of the concentrate in the field of mineral processing, improves the efficiency of the quality control, considerably improves the efficiency of optimizing the recovery rate and the product index concentrated, and allows a relatively separate regulation of quality and recovery rate.

Description

Two-zone flotation method of copper sulfide cobalt ore for industrial production Technical field

The invention belongs to the technical field of mineral processing engineering, and particularly relates to a two-zone flotation method for copper sulfide cobalt ore used for industrial production.

Background technique

The beneficiation of copper sulfide cobalt ore currently has few mature industrial applications in China. The recovery rate and concentrate grade are two interrelated and contradictory indicators in the field of mineral processing. There is a problem that the grade and recovery rate are not easy to be separated and controlled.

Summary of the invention

The technical problem solved by the invention is to provide a two-zone flotation method for copper sulphide ore for industrial production, and realize efficient recovery of copper and cobalt elements in sulphide sulphide ore in the industrial production field. The use of the dual-step flotation method effectively alleviates the contradiction between the recovery rate and the concentrate grade in the field, and improves the efficiency of quality control. Through this method, the recovery efficiency and the optimization efficiency of the concentrate index are greatly improved, and the relative separation control of the grade and the recovery rate is realized.

The technical solution of the invention:

A two-zone flotation method for copper sulfide cobalt ore for industrial production, comprising the following steps

1) Step 1: Grated

The ore from the automobile is directly poured into the mine bin through the original ore sieve, and transported to the jaw crusher through the heavy plate feeder, and the coarsely crushed product is transported to the intermediate heap through the belt conveyor;

2) Step 2: Intermediate heap heap

Because the coarsely-cut operation system is different from the sorting operation system, in order to ensure the supply of ore during the break-up and maintenance period, the intermediate ore pile is set as the supply buffer for the sorting process;

3) Step 3: Grinding

The ore of the intermediate heap is transported by belt to a semi-autogenous mill for grinding. The material under the sieve enters the grinding pump pool and is sent to the hydrocyclone for classification by the slurry pump. The sediment enters the ball mill for grinding, and the ball mill grinds the product. After entering the grinding pump pool, it is sent to the hydrocyclone by the slurry pump, and the overflow product is sent to the flotation, and the sediment continues to enter the ball mill for grinding;

4) Step 4: Flotation

Partition flotation is divided into two zones. Zone I is mainly used for concentrate index control, Zone II is used for recovery rate control, and Zone I and Zone II have two mixing buckets, one for each. Bucket and 2# mixing tank, each of the two areas produces a concentrate product, namely concentrate 1 and concentrate 2;

The I-zone flotation operation adopts the process of two coarse one sweeping three fines

The coarse selection of the first zone is added to the 1# mixing tank. When the hydrocyclone overflows the slurry into the 1# mixing tank, that is, the starting point of the I zone, after the slurry is fully stirred, it enters the rough selection operation flotation tank. Rough selection of a working slurry into the rough selection operation, rough selection of the second operation slurry into the sweeping operation, and rough selection of the first operation and rough selection of the foam into the selected operation area of Zone I; the foam of the sweeping operation returns to the coarse Select the second operation, the slurry enters the starting position of Zone 2 2# mixing bucket; the selected operation in Zone I is divided into three selections; the selected one foam enters the selected two operations, the slurry returns to rough selection, and the second foam is selected. Into the selected three operations, select three jobs without adding pharmacy, select the second and selected three operations of the pulp returned to the selected one and the second selection, the selected three operations of the foam is the concentrate 1 product;

The crude material of the I zone is added to the mixing tank of 1#, wherein the pH adjuster lime dosage is 600g/t, the pulp pH is guaranteed to be 9.5~10.0, the inhibitor sodium humate dosage is 150g/t, and the foaming agent 2# oil The dosage is 70g/t, and the dosage of the collector butyl yellow is 60g/t.

The type and amount of the added agent in the rough selection operation of the I zone is: the amount of the inhibitor sodium humate is 70 g/t, Foaming agent 2# oil dosage 24g / t, collector butyl yellow dosage 35g / t.

The I zone sweeping operation only adds the collector butyl xanthate in an amount of 25 g/t.

The I zone selection operation only adds the inhibitor sodium humate in an amount of 40 g/t.

The selected I operation of the I zone only added the inhibitor sodium humate in an amount of 20 g/t.

The flotation operation in Zone II is a rough two-sweeping process

The chemicals in the rough selection of Zone II are added to the 2# mixing tank. After the slurry is fully mixed, it enters the rough selection and flotation tank. The slurry of the rough selection operation enters the sweeping and selection operation, and the slurry enters the selected operation area of Zone II. The slurry of one operation enters the second cleaning operation, the foam returns to the rough selection operation, the second operation does not add the flotation reagent, the second slurry is selected to enter the tailings pond, and is transported to the tailings thickener through the slurry pump; The operation is divided into three selections, one selected job foam enters the selected two operations, the slurry is returned to the rough selection operation, the selected two operation foams are entered into the selection three, and the selected two and the selected three operations are sequentially returned to the fine. Select one and select two, the three selected foam is the concentrate 2 product.

The agent for rough selection in the II region is a collector butyl xanthate and an inhibitor sodium humate in amounts of 20 g/t and 30 g/t, respectively.

The II zone sweeping operation only adds the collector butyl xanthate in an amount of 10 g/t.

The selected and selected two of the II zone were only added with inhibitor sodium humate in amounts of 15 g/t and 10 g/t, respectively.

The beneficial effects of the invention:

The sulphide-copper-cobalt ore beneficiation method has a simple pharmacy system, but the sorting effect is good under the optimized process and the ratio of the medicaments, and the beneficiation process of the method is applied in a copper-cobalt mine. Flotation Zone 1 pays attention to controlling product indicators. Flotation Zone 2 mainly optimizes product recovery rate. By partitioning flotation and dividing tasks, it is a good way to alleviate the contradiction between recovery rate and grade in the ordinary beneficiation process. The target solution is divided to facilitate the control of the indicator.

DRAWINGS

The invention has three drawings

1 is a diagram showing the relationship between the equipment of the two-zone flotation method of the copper sulfide cobalt ore according to the present invention;

2 is a simplified diagram of a two-zone flotation step of a copper-copper sulfide ore according to the present invention;

3 is a flow chart of a two-zone flotation process of copper sulfide ore according to the present invention;

Detailed ways

The invention is described in further detail below with reference to the drawings and preferred embodiments.

Example 1

The main ore types targeted are mainly copper sulfide cobalt ore, in which the average grade of copper is 1.5%; the average grade of cobalt is 0.5%. The mineralogical characteristics are: the copper mineral in the ore is mainly chalcopyrite, followed by the porphyrite, the chalcopyrite, the rare amount of natural copper and copper blue, etc.; the cobalt mineral is sulphur copper-cobalt ore; other sulfide minerals are mainly Pyrite, etc.; gangue minerals mainly include dolomite, quartz, mica, etc.; ore contains a small amount of carbonaceous matter.

The grinding uses a semi-autogenous grinding + ball milling SAB process.

The sorting process adopts a flotation process, in which the flotation process adopts district flotation, which is divided into two zones, one zone is mainly used for concentrate index control, and the second zone is used for recovery rate control.

The main main processes are as follows:

Crushed

The ore density is 2.73t/m ³ , the looseness coefficient is 1.5-1.7, and the ore moisture content is 2-5%.

The coarse crushing station is arranged in the open air as a whole, and the ore from the automobile transportation is directly poured into the mining bin through the original ore sieve.

The 1500X8000mm heavy-duty plate feeder is fed into the jaw crusher.

The size of the crusher feed port is 850×1100mm, the feed size is 0-750mm, and the maximum product size is 150mm; the coarsely crushed product is transported to the intermediate pile by the 1# belt conveyor;

2. Intermediate heap

Since the broken operation system is different from the sorting operation system, in order to ensure the supply of ore during the breakage maintenance, the intermediate ore heap is set as the supply buffer for the sorting process;

Intermediate mine heap equipment

3. Grinding

The semi-self-grinding ore size is 250-0mm, P80=175mm; the ore size requirement is -2mm≥80%, and the grinding concentration (average) is 75%-80%. The discharge end is provided with a double-layer cylindrical sieve (the inner sieve size is 20×40mm, and the outer sieve size is 6×15mm). The material under the sieve enters the grinding pump pool and is sent to the hydrocyclone for classification by the slurry pump. The stream product is sent to the flotation, and the sediment is passed into a ball mill for grinding.

The ball mill feeds the particle size P80=2mm, the grinding concentration (average) is 75%-80%, and the cycle load is 300%. The cylinder speed is 13r/min and the rotation rate is 75%. The ball mill grinding product enters the grinding pump pool (shared with the semi-self-grinding pumping tank) and is sent to the hydrocyclone by the slurry pump. The overflow product is sent to the flotation, and the sediment is sent to the ball mill for grinding.

The hydrocyclone group specification is Φ500x10, the ore slurry volume is 335.7m3/h (considering the fluctuation coefficient), the overflow weight concentration is 30%, and the overflow fineness -0.074mm accounts for 80%.

Main equipment in the grinding workshop

4. Flotation

The flotation operation is divided into two working areas: Zone 1 and Zone 2. The two operating zones each have a mixing tank, which is a 1# mixing drum and a 2# mixing drum. The two zones each produce a concentrate product, respectively. For concentrate 1 and concentrate 2. The specific process flow is as follows.

The flotation operation in Zone 1 is the process of two coarse and three sweeps.

The hydrocyclone overflow slurry enters the 1# mixing tank, which is the starting point of Zone 1.

1 area rough selection of a potion added to the 1# mixing tank, wherein the pH adjuster lime dosage 600g / t, to ensure the pulp pH = 9.5 ~ 10.0, the inhibitor sodium humate dosage 150g / t, foaming agent 2 # oil dosage 70g / t, the collector butyl yellow medicinal amount 60g / t, after the pulp is fully stirred, enter the rough selection of a flotation tank. Rough selection of a working slurry into the rough selection operation;

The types and dosages of the added drugs in the rough selection operation were as follows: the inhibitor sodium sulfonate dosage 70g/t, the foaming agent 2# oil dosage 24g/t, and the collector butyl yellow dosage 35g/t.

The rough selection of the second working slurry enters the sweeping operation, and the rough selection of the operation and the rough selection of the two operations of the foam enters the selected operation area of Zone 1;

The sweeping operation only adds the collector butyl xanthate, the dosage is 25g/t, the foam of the sweeping operation returns to the rough selection operation, and the slurry enters the starting position of the 2nd zone 2# mixing tank;

The selected work in Zone 1 is divided into three selections.

In the selected operation, only the inhibitor sodium humate was added, the dosage was 40g/t, and a selected foam was put into the selected two operations, and the slurry was returned to the rough selection operation.

Select 2 also added only the inhibitor sodium humate in an amount of 20 g/t, and the selected two foams entered the selected three operations.

The selected three operations do not add pharmacy, and the selected two and three selected granules are returned to the selected one and the second selected in sequence, and the selected three working foam is the concentrate 1 product.

The 2-zone flotation operation is a rough two-sweeping process.

The agent in the roughing operation in Zone 2 is added to the 2# mixing tank. The added agent is the collector butyl xanthate and the inhibitor sodium humate, the dosages are 20g/t and 30g/t respectively, and the slurry is fully stirred and then enters. Roughly select a flotation cell. The slurry of the rough selection operation enters the sweeping and selection operation, and the slurry enters the selected operation area of Zone 2.

Only one collector butyl xanthate was added to the sweeping operation, and the dosage was 10 g/t. The slurry from the sweeping operation enters the sweeping operation and the foam is returned to the roughing operation. The second cleaning operation does not add flotation reagents, sweeps the second slurry into the tailings pond, and transports it to the tailings thickener through the slurry pump.

The selected work in Zone 2 is divided into three selections.

A selected operating foam enters the selected two operations, and the slurry is returned to the roughing operation. Both the selected one and the selected two were only added with the inhibitor sodium humate in amounts of 15 g/t and 10 g/t, respectively.

The selected two working foams enter the selected three, and the selected two and selected three jobs are returned sequentially. To select one and select two.

The three selected foams are concentrate 2 products.

Main equipment of flotation workshop

name The main technical parameters Stirring tank (sulfurization ore flotation) Φ3.5×4.0m Stirring tank (oxidation ore flotation) Φ4.0×4.5m Flotation machine XCF-30 Flotation machine KYF-30 Flotation machine XCF-8 Flotation machine KYF-8 Slurry pump (sulfurized ore flotation concentrate) 80/65 Slurry pump (oxidized ore flotation concentrate) 50/40 Slurry pump (tailing) 250/200 Pipeline sampling machine (copper sulfide cobalt concentrate) DN200 Pipeline sampling machine (copper oxide cobalt concentrate) DN200 Pipeline sampling machine (flotation tailings) DN350 Blower 450m ³ , 50kpa Submerged pump (accumulation pool) 65 (export) Submerged pump (in the tailings pit) 65 (export) Sulfur mine selection tailings pump pool level 0~1.5m Sulfide ore flotation concentrate pump pool level 0~1.5m Oxidized ore flotation concentrate pump pool level 0~1.5m

Flotation tailings pump pool level 0~2.5m Blower outlet wind pressure 0～0.05MPa

The production indicators are as follows:

From the production results, this method is used to achieve efficient separation of copper sulphide ore.

Finally, by this method, under the conditions of 1.5% Cu grade and 0.5% Co grade of copper sulfide cobalt ore, it is possible to produce copper sulfide cobalt concentrate with Cu grade of 23% and Co grade of 8%, and Cu recovery rate of over 90%. The cobalt recovery rate is over 80%. At the same time, the reform process can also optimize the pharmaceutical system, and can also carry out mixed sorting of copper sulfide cobalt ore and copper oxide cobalt ore for the treatment of partial oxidation ore.

Using the process flow of Figure 3, the treatment volume reaches 3000t/d, and when the average grade of the original ore is Cu1.5% and Co0.5%, it can produce copper sulfide with a Cu grade of 23% and a Co grade of 8%. Concentrate, Cu recovery rate of more than 90%, cobalt recovery rate of more than 80%.

Claims (9)

A two-zone flotation method of copper sulfide cobalt ore for industrial production, characterized in that it comprises the following steps 1) Step 1: Grated The ore from the automobile is directly poured into the mine bin through the original ore sieve, and transported to the jaw crusher through the heavy plate feeder, and the coarsely crushed product is transported to the intermediate heap through the belt conveyor; 2) Step 2: Intermediate heap heap Because the coarsely-cut operation system is different from the sorting operation system, in order to ensure the supply of ore during the break-up and maintenance period, the intermediate ore pile is set as the supply buffer for the sorting process; 3) Step 3: Grinding The ore of the intermediate heap is transported by belt to a semi-autogenous mill for grinding. The material under the sieve enters the grinding pump pool and is sent to the hydrocyclone for classification by the slurry pump. The sediment enters the ball mill for grinding, and the ball mill grinds the product. After entering the grinding pump pool, it is sent to the hydrocyclone by the slurry pump, and the overflow product is sent to the flotation, and the sediment continues to enter the ball mill for grinding; 4) Step 4: Flotation Partition flotation is divided into two zones. Zone I is mainly used for concentrate index control, Zone II is used for recovery rate control, and Zone I and Zone II have two mixing buckets, one for each. Bucket and 2# mixing tank, each of the two areas produces a concentrate product, namely concentrate 1 and concentrate 2; The I-zone flotation operation adopts the process of two coarse one sweeping three fines The coarse selection of the first zone is added to the 1# mixing tank. When the hydrocyclone overflows the slurry into the 1# mixing tank, that is, the starting point of the I zone, after the slurry is fully stirred, it enters the rough selection operation flotation tank. Rough selection of a working slurry into the rough selection operation, rough selection of the second operation slurry into the sweeping operation, and rough selection of an operation and coarse The foam selected for the second operation enters the selected operation area of Zone I; the foam of the sweeping operation returns to the rough selection operation, the slurry enters the starting position of Zone II 2# mixing bucket; the selected operation of Zone I is divided into three selections. Select a foam into the selected two operations, the slurry returns to the rough selection, the selected two foams enter the selected three operations, select the three jobs without adding the pharmacy, and the selected two and the selected three jobs are sequentially returned to the pulp. Featured 1 and Selected 2, the selected three-operation foam is the concentrate 1 product; The flotation operation in Zone II is a rough two-sweeping process The chemicals in the rough selection of Zone II are added to the 2# mixing tank. After the slurry is fully mixed, it enters the rough selection and flotation tank. The slurry of the rough selection operation enters the sweeping and selection operation, and the slurry enters the selected operation area of Zone II. The slurry of one operation enters the second cleaning operation, the foam returns to the rough selection operation, the second operation does not add the flotation reagent, the second slurry is selected to enter the tailings pond, and is transported to the tailings thickener through the slurry pump; The operation is divided into three selections, one selected job foam enters the selected two operations, the slurry is returned to the rough selection operation, the selected two operation foams are entered into the selection three, and the selected two and the selected three operations are sequentially returned to the fine. Select one and select two, the three selected foam is the concentrate 2 product. The method according to claim 1, wherein the medicament for rough selection of the I zone is added to the ## mixing tank, wherein the pH adjuster lime is used in an amount of 600 g/t to ensure the pulp pH=9.5 to 10.0, and the inhibitor is humus The amount of sodium is 150g/t, the amount of foaming agent 2# is 70g/t, and the amount of collector butyl yellow is 60g/t. The method according to claim 1, wherein the type and amount of the added agent in the rough selection of the I zone are: the amount of the inhibitor sodium sulphate is 70 g/t, and the foaming agent 2# oil is 24 g/t, The dosage of butyl yellow was 35g/t. The method of claim 1 wherein said I zone sweeping operation adds only the collector butyl xanthate in an amount of 25 g/t. The method of claim 1 wherein said I zone selects an assignment only The inhibitor sodium humate was added in an amount of 40 g/t. The method according to claim 1, wherein said I zone selection second operation only adds inhibitor sodium humate in an amount of 20 g/t. The method according to claim 1, wherein the agent selected in the Region II is a collector butyl xanthate and an inhibitor sodium humate in amounts of 20 g/t and 30 g/t, respectively. The method according to claim 1, wherein said II zone sweeping operation adds only the collector butyl xanthate in an amount of 10 g/t. The method according to claim 1, characterized in that the II zone selected one and the selected two are each added with only inhibitor sodium humate in amounts of 15 g/t and 10 g/t, respectively.

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