CN111715413A - Method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation - Google Patents
Method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation Download PDFInfo
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- CN111715413A CN111715413A CN202010685887.8A CN202010685887A CN111715413A CN 111715413 A CN111715413 A CN 111715413A CN 202010685887 A CN202010685887 A CN 202010685887A CN 111715413 A CN111715413 A CN 111715413A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/08—Subsequent treatment of concentrated product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
Abstract
The invention discloses a method for flotation and enrichment of sulfur concentrate from lead-dressing and copper-dressing tailings, which comprises the steps of production of lead-dressing and copper-dressing tailings, activation of lead-dressing and copper-dressing tailings, primary flotation of sulfur concentrate, deep activation of primary flotation of sulfur tailings, adsorption purification and cyclic utilization of secondary flotation of sulfur concentrate and flotation system liquid, and the like. According to the method, the lead-selecting and copper-selecting tailings are subjected to activation of the lead-selecting and copper-selecting tailings, primary flotation of sulfur concentrate, deep activation of primary flotation of sulfur tailings, secondary flotation of sulfur concentrate, and adsorption purification and cyclic utilization of a flotation system liquid, so that products such as sulfur concentrate, gold concentrate and the like are recovered from the lead-selecting and copper-selecting tailings of gold concentrate cyanidation tailings to the maximum extent, the problems of low recovery of pyrite, difficult effective recovery of gold and the like in the lead-selecting and copper-selecting tailings are solved, gold ore resources are fully utilized, and the resource utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of flotation, in particular to a method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation.
Background
The gold concentrate suitable for direct cyanidation system treatment contains not only gold and silver, but also sulfur, a certain amount of valuable metals such as copper, lead and the like. After gold concentrate is subjected to direct cyanidation to extract gold and silver, the gold extraction tailings are subjected to lead separation and copper separation processes to obtain lead concentrate with lead content of more than 40% and copper concentrate with copper content of more than 10%, the lead concentrate is sold to a lead smelting plant, and the copper concentrate is sold to a copper smelting plant or sulfated roasting, acid leaching, extraction and electrodeposition are adopted to produce qualified cathode copper. The lead-selecting and copper-selecting tailings are subjected to a sulfur-selecting process to produce sulfur concentrate containing more than 46% of sulfur, and flotation tailings containing 5-8% of sulfur are subjected to stockpiling or waste treatment, so that the recovery effect of sulfur is poor, and a small amount of dissolved gold in a system liquid is not effectively recovered, thereby causing resource waste.
Disclosure of Invention
The invention provides a method for flotation of tailings from lead and copper separation to enrich sulfur concentrate, aiming at the problem of insufficient recovery of valuable metals in the existing gold concentrate.
The technical scheme for solving the technical problems is as follows: a method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation comprises the following steps:
1) and (3) production of lead-selecting and copper-selecting tailings: carrying out a conventional and sequential lead concentrate flotation process and a copper concentrate flotation process on gold extraction tailings produced by a direct cyanidation gold extraction process on gold concentrates to produce lead concentrates containing more than 40% of lead and copper concentrates containing more than 10% of copper, and carrying out filter pressing on residual solid material ore pulp by a filter press to obtain lead-selecting and copper-selecting tailings containing 28-32% of sulfur;
2) activation of tailings after lead and copper selection: adding hot water produced by a plate heat exchanger in a purification process of a sulfuric acid production system into the lead-selecting and copper-selecting tailings obtained in the step 1), mixing, adding sulfuric acid to adjust the pH value to 7-8, adding hydrogen peroxide, and carrying out primary stirring at the stirring speed of 150-200rpm for 2-4 h;
3) first-stage flotation of sulfur concentrate: putting the ore pulp obtained in the step 2) and added with the flotation agent into a flotation tank to perform closed-circuit primary flotation in sequence, and obtaining sulfur concentrate with 47-49% of sulfur grade and primary sulfur-selecting tailings with 6-10% of sulfur grade through primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration;
4) deep activation of first-stage sulfur separation tailings: adjusting the concentration of the ore pulp of the primary sulfur separation tailings produced in the step 3) to 26-30%, adding sodium metabisulfite and sodium peroxodisulfate, and stirring for 2-4h in a stirrer for the second time;
5) secondary flotation of sulfur concentrate: adding sodium silicate, soda ash and a flotation reagent into the ore obtained in the step 4), putting the ore into a flotation tank for closed-circuit secondary flotation, performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain a sulfur concentrate with 47-49% of sulfur grade and secondary sulfur-selecting tailings with 0.5-1.0% of sulfur grade, and respectively dehydrating the sulfur concentrate ore pulp and the sulfur-selecting tailings ore pulp through a filter press to obtain a sulfur concentrate filter cake, sulfur-selecting tailings and gold-containing 0.2-0.4g/m3The solid content is 30-50g/m3The sulfur concentrate enters a sulfuric acid and waste heat power generation system for comprehensive utilization, and the sulfur-selecting tailings are used as building material production raw materials to prepare building material products such as aerated bricks or other landscape bricks;
6) adsorption purification and cyclic utilization of flotation system liquid: adding 30-50g/m of powdered activated carbon into the flotation system liquid produced in the step 5)3Stirring for 4-6h, and press-filtering with plate-and-frame filter press to obtain 3000g/t gold fine powder containing gold 2000-one and solid content of 0.2-0.3g/m3The purified liquid is recycled by a gold fine powder outsourcing gold extraction smeltery or a conventional gold extraction method, and the purified liquid returns to the acid making system for heat exchange by a plate heat exchanger in the purification process.
Wherein, in the step 2), the concentration of size mixing is 35-40%, the temperature of size mixing is 40-50 ℃, and the amount of hydrogen peroxide added is 2-5 kg/t; in the step 3), the flotation agent is isoamyl xanthate, and the dosage is 500 g/t; in the step 4), the using amount of sodium metabisulfite is 2-5kg/t, and the using amount of sodium peroxodisulfate is 2-5 kg/t; in the step 5), the adding amount of sodium silicate is 1000g/t plus 800-; in the step 6), the dosage of the powdery active carbon is 30-50g/m3。
The invention has the beneficial effects that: according to the method, the lead-selecting and copper-selecting tailings are subjected to activation of the lead-selecting and copper-selecting tailings, primary flotation of sulfur concentrate, deep activation of primary flotation of sulfur tailings, secondary flotation of sulfur concentrate, and adsorption purification and cyclic utilization of a flotation system liquid, so that products such as sulfur concentrate, gold concentrate and the like are recovered from the lead-selecting and copper-selecting tailings of gold concentrate cyanidation tailings to the maximum extent, the problems of low recovery of pyrite, difficult effective recovery of gold and the like in the lead-selecting and copper-selecting tailings are solved, gold ore resources are fully utilized, and the resource utilization rate is improved.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
A method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation comprises the following steps:
1) and (3) production of lead-selecting and copper-selecting tailings: carrying out a conventional and sequential lead concentrate flotation process and a copper concentrate flotation process on gold extraction tailings produced by a direct cyanidation gold extraction process on gold concentrates to produce lead concentrates containing more than 40% of lead and copper concentrates containing more than 10% of copper, and carrying out filter pressing on residual solid material ore pulp by a filter press to obtain lead-selecting and copper-selecting tailings containing 28% of sulfur;
2) mixing the lead-selecting and copper-selecting tailings with hot water produced by a plate heat exchanger in a purification process of a sulfuric acid production system, controlling the concentration of ore pulp to be 35%, controlling the temperature to be 40 ℃, adding 10kg/t of sulfuric acid, controlling the pH value to be 7, adding 2kg/t of hydrogen peroxide, and carrying out primary stirring at the stirring speed of 150rpm for 2 hours;
3) putting the ore pulp obtained in the step 2) and added with a flotation agent into a flotation tank to perform closed-circuit primary flotation in sequence, and performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain a sulfur concentrate with 47% of sulfur grade and primary sulfur-selecting tailings with 6% of sulfur grade, wherein the flotation agent is isoamyl xanthate, and the dosage of the flotation agent is 300 g/t;
4) controlling the concentration of ore pulp of the primary sulfur separation tailings produced in the step 3) to be 26%, adding 2kg/t of sodium metabisulfite and 2kg/t of sodium peroxodisulfate, and stirring for 2 hours in a stirrer for the second time;
5) adding 800g/t of sodium silicate and 800g/t of soda into the ore pulp obtained in the step 4), adding a flotation reagent, putting the ore pulp into a flotation tank for closed-circuit secondary flotation, performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain a sulfur concentrate with 47% of sulfur grade and secondary sulfur tailings with 0.5% of sulfur grade, and dehydrating the sulfur concentrate ore pulp and the sulfur tailings ore pulp through a filter press to obtain a sulfur concentrate filter cake, sulfur tailings and gold-containing 0.2g/m3A solid content of 30g/m3The flotation agent of the flotation system is isoamyl xanthate, the dosage of the flotation agent is 300g/t, sulfur concentrate enters a sulfuric acid and waste heat power generation system for comprehensive utilization, and sulfur-selecting tailings are used as building material production raw materials to prepare building material products such as aerated bricks or other landscape bricks;
6) adsorption purification and cyclic utilization of flotation system liquid: adding 30g/m of powdered activated carbon into the flotation system liquid produced in the step 5)3Stirring for 4h, and press-filtering with plate-and-frame filter press to obtain gold fine powder containing gold 2000g/t and solid content of 0.2g/m3The purified liquid is recycled by a gold fine powder outsourcing gold extraction smeltery or a conventional gold extraction method, and the purified liquid returns to the acid making system for heat exchange by a plate heat exchanger in the purification process.
Example 2
A method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation comprises the following steps:
1) and (3) production of lead-selecting and copper-selecting tailings: carrying out a conventional and sequential lead concentrate flotation process and a copper concentrate flotation process on gold extraction tailings produced by a direct cyanidation gold extraction process on gold concentrates to produce lead concentrates containing more than 40% of lead and copper concentrates containing more than 10% of copper, and carrying out filter pressing on residual solid material ore pulp by a filter press to obtain lead-selecting and copper-selecting tailings containing 30% of sulfur;
2) adding hot water produced by a plate heat exchanger in a purification process of a sulfuric acid production system into the lead-selecting copper-selecting tailings obtained in the step 1), controlling the concentration of ore pulp to be 38%, controlling the temperature to be 45 ℃, adding 15kg/t of sulfuric acid, controlling the pH value to be 7.5, adding 3.5kg/t of hydrogen peroxide, stirring for the first time at the stirring speed of 175rpm for 3 hours;
3) putting the ore pulp obtained in the step 2) and added with a flotation agent into a flotation tank to perform closed-circuit primary flotation in sequence, and performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain a sulfur concentrate with 48% of sulfur grade and primary sulfur-selecting tailings with 8% of sulfur grade, wherein the flotation agent is isoamyl xanthate, and the dosage of the flotation agent is 400 g/t;
4) the deep activation technology of the first-stage sulfur separation tailings comprises the following steps: controlling the concentration of the ore pulp of the primary sulfur separation tailings produced in the step 3) to be 28%, adding 3.5kg/t of sodium metabisulfite and 3.5kg/t of sodium persulfate, and stirring for 3 hours in a stirrer for the second time;
5) adding 900g/t of sodium silicate and 9000g/t of soda into the ore pulp obtained in the step 4), adding a flotation reagent, putting the ore pulp into a flotation tank for closed-circuit secondary flotation, performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain sulfur concentrate with 48% of sulfur grade and secondary sulfur tailings with 0.8% of sulfur grade, and dehydrating the sulfur concentrate ore pulp and the sulfur tailings ore pulp through a filter press to obtain a sulfur concentrate filter cake, sulfur tailings and gold-containing ore of 0.3g/m3A solids content of 40g/m3The flotation agent of the flotation system is isoamyl xanthate, the dosage of the flotation agent is 400g/t, sulfur concentrate enters a sulfuric acid and waste heat power generation system for comprehensive utilization, and sulfur-selecting tailings are used as building material production raw materials to prepare building material products such as aerated bricks or other landscape bricks;
6) flotation system liquidThe adsorption purification and the cyclic utilization are as follows: adding 40g/m of powdered activated carbon into the flotation system liquid produced in the step 5)3Stirring for 5h, and press-filtering with plate-and-frame filter press to obtain gold fine powder containing 2500g/t gold and solid content of 0.25g/m3The purified liquid is recycled by a gold fine powder outsourcing gold extraction smeltery or a conventional gold extraction method, and the purified liquid returns to the acid making system for heat exchange by a plate heat exchanger in the purification process.
Example 3
A method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation comprises the following steps:
1) and (3) production of lead-selecting and copper-selecting tailings: carrying out a conventional and sequential lead concentrate flotation process and a copper concentrate flotation process on gold extraction tailings produced by a direct cyanidation gold extraction process on gold concentrates to produce lead concentrates containing more than 40% of lead and copper concentrates containing more than 10% of copper, and carrying out filter pressing on residual solid material ore pulp by a filter press to obtain lead-selecting and copper-selecting tailings containing 32% of sulfur;
2) mixing the lead-selecting copper-selecting tailings obtained in the step 1) with hot water produced by a plate heat exchanger in a purification process of a sulfuric acid production system, controlling the concentration of ore pulp to be 40%, controlling the temperature to be 50 ℃, adding 20kg/t of sulfuric acid, controlling the pH value to be 8, adding 5kg/t of hydrogen peroxide, stirring for the first time, wherein the stirring speed is 200rpm, and the stirring time is 4 hours;
3) putting the ore pulp obtained in the step 2) and added with a flotation agent into a flotation tank to perform closed-circuit primary flotation in sequence, and performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain a sulfur concentrate with 49% of sulfur grade and primary sulfur-selecting tailings with 10% of sulfur grade, wherein the flotation agent is isoamyl xanthate, and the dosage of the flotation agent is 500 g/t;
4) controlling the concentration of the ore pulp of the primary sulfur separation tailings produced in the step 3) to be 30%, adding 5kg/t of sodium metabisulfite and 5kg/t of sodium peroxodisulfate, and stirring for the second time in a stirrer for 4 hours;
5) adding 1000g/t of sodium silicate and 1000g/t of soda into the ore pulp obtained in the step 4), adding a flotation reagent, putting the ore pulp into a flotation tank for closed-circuit secondary flotation, and obtaining a sulfur concentrate with 49% of sulfur grade and a secondary separation with 1.0% of sulfur grade through primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentrationThe sulfur tailings, the sulfur concentrate ore pulp and the sulfur-selecting tailings ore pulp are respectively dehydrated by a filter press to obtain a sulfur concentrate filter cake, sulfur-selecting tailings and gold-containing ore with the concentration of 0.4g/m3And a solid content of 50g/m3The flotation agent of the flotation system is isoamyl xanthate, the dosage of the flotation agent is 500g/t, sulfur concentrate enters a sulfuric acid and waste heat power generation system for comprehensive utilization, and sulfur-selecting tailings are used as building material production raw materials to prepare building material products such as aerated bricks or other landscape bricks;
6) adding 50g/m of powdered activated carbon into the flotation system liquid produced in the step 5)3Stirring for 6h, and press-filtering with plate-and-frame filter press to obtain gold fine powder containing gold 3000g/t and solid content of 0.3g/m3The purified liquid is recycled by a gold fine powder outsourcing gold extraction smeltery or a conventional gold extraction method, and the purified liquid returns to the acid making system for heat exchange by a plate heat exchanger in the purification process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A method for enriching sulfur concentrate by flotation of tailings generated in lead and copper separation is characterized by comprising the following steps:
1) and (3) production of lead-selecting and copper-selecting tailings: carrying out a conventional and sequential lead concentrate flotation process and a copper concentrate flotation process on gold extraction tailings produced by a direct cyanidation gold extraction process on gold concentrates to produce lead concentrates containing more than 40% of lead and copper concentrates containing more than 10% of copper, and carrying out filter pressing on residual solid material ore pulp by a filter press to obtain lead-selecting and copper-selecting tailings containing 28-32% of sulfur;
2) activation of tailings after lead and copper selection: adding hot water produced by a plate heat exchanger in a purification process of a sulfuric acid production system into the lead-selecting and copper-selecting tailings obtained in the step 1), mixing, adding sulfuric acid to adjust the pH value to 7-8, adding hydrogen peroxide, and carrying out primary stirring at the stirring speed of 150-200rpm for 2-4 h;
3) first-stage flotation of sulfur concentrate: putting the ore pulp obtained in the step 2) and added with the flotation agent into a flotation tank to perform closed-circuit primary flotation in sequence, and obtaining sulfur concentrate with 47-49% of sulfur grade and primary sulfur-selecting tailings with 6-10% of sulfur grade through primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration;
4) deep activation of first-stage sulfur separation tailings: adjusting the concentration of the ore pulp of the primary sulfur separation tailings produced in the step 3) to 26-30%, adding sodium metabisulfite and sodium peroxodisulfate, and stirring for 2-4h in a stirrer for the second time;
5) secondary flotation of sulfur concentrate: adding sodium silicate, soda ash and a flotation reagent into the ore obtained in the step 4), putting the ore into a flotation tank for closed-circuit secondary flotation, performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain a sulfur concentrate with 47-49% of sulfur grade and secondary sulfur-selecting tailings with 0.5-1.0% of sulfur grade, and respectively dehydrating the sulfur concentrate ore pulp and the sulfur-selecting tailings ore pulp through a filter press to obtain a sulfur concentrate filter cake, sulfur-selecting tailings and gold-containing 0.2-0.4g/m3The solid content is 30-50g/m3The flotation system liquid of (1);
6) adsorption purification and cyclic utilization of flotation system liquid: adding 30-50g/m of powdered activated carbon into the flotation system liquid produced in the step 5)3Stirring for 4-6h, and press-filtering with plate-and-frame filter press to obtain 3000g/t gold fine powder containing gold 2000-one and solid content of 0.2-0.3g/m3The purified liquid of (4).
2. The method as claimed in claim 1, wherein in the step 2), the size mixing concentration is 35-40%, and the size mixing temperature is 40-50 ℃; the amount of the added hydrogen peroxide is 2-5 kg/t.
3. The method as claimed in claim 1, wherein in step 3), the flotation agent is isoamyl xanthate in an amount of 300-500 g/t.
4. The method as claimed in claim 1, wherein in step 4), the amount of sodium metabisulfite is 2-5kg/t and the amount of sodium peroxodisulfate is 2-5 kg/t.
5. The method as claimed in claim 1, wherein in step 5), the addition amount of sodium silicate is 800-; the flotation reagent is isoamyl xanthate, and the dosage of the flotation reagent is 300-500 g/t.
6. The method as claimed in claim 1, wherein the amount of powdered activated carbon used in the step 6) is 30 to 50g/m3。
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