CN111905920A - Method for recovering valuable elements from cyaniding gold extraction waste residues - Google Patents
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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Abstract
The invention discloses a method for recovering valuable elements from cyaniding gold extraction waste residues, which comprises the steps of acidification pretreatment, drying and activating treatment, mixed flotation, separation flotation, roasting for preparing acid, roasting for floating gold and the like. The invention has the beneficial effects that: the invention relates to a process method for comprehensively recovering valuable elements from cyaniding gold extraction waste residues, which recycles the cyaniding gold extraction waste residues, recovers the valuable elements such as Fe, S, Cu, Pb, Zn, Au, Ag and the like from the cyaniding gold extraction waste residues, fully utilizes resources, improves the comprehensive utilization effect of the resources, improves the economic benefit and reduces the environmental pollution.
Description
Technical Field
The invention relates to recovery of gold smelting waste liquid, in particular to a method for recovering valuable elements from cyaniding gold extraction waste residues.
Background
The cyaniding gold extraction waste residue is the product of gold-bearing sulfide ore after gold extraction by cyaniding. The main components are iron sulfide, silicon dioxide, and a small amount of sulfides and oxides of copper, lead, zinc, and the like, and also contain a small amount of noble metals such as gold, silver, and the like. Wherein, the content of silicon dioxide is 35-40%, the content of sulfur is 20-30%, the content of copper, lead and zinc are 0.1-0.6%, 0.1-0.5% and 0.1-0.5%, respectively, and the content of gold and silver is 0.5-1g/t and 10-30g/t, respectively. The existing method for treating the cyaniding gold extraction waste residue is mainly to adopt a stockpiling and roasting method to prepare acid according to the sulfur content in the waste residue, produce the sulfuric acid by adopting a direct roasting method for the gold extraction waste residue with the sulfur content of more than 20 percent, generally stockpile and treat the gold extraction tailings with the sulfur content of less than 20 percent, and comprehensively utilize other valuable elements, thereby causing the waste of resources.
In the process of producing sulfuric acid by using gold extraction waste slag, cinder is produced, the iron content is 25-35%, and the recycling value and economic value are low, so that comprehensive utilization is not required. Although a part of iron ore concentrate can be recovered through magnetic separation, the recovery rate is very low and is only 5-6%, the grade of the iron ore concentrate is 55-59%, impurities such as sulfur and the like exceed the standard, and the quality of the iron ore concentrate is obviously poor. The cinder is generally used for stockpiling treatment or cement additive, and whether the cinder is stockpiled treatment or the cement additive, the cinder causes environmental pollution and resource waste.
Disclosure of Invention
The invention provides a method for recovering valuable elements from cyaniding gold extraction waste residues, aiming at the problem that the valuable elements in the existing cyaniding gold extraction waste residues are not completely extracted.
The technical scheme for solving the technical problems is as follows: a method for recovering valuable elements from cyaniding gold extraction waste residues comprises the following steps:
1) acidifying pretreatment: adding water into cyaniding gold extraction tailings to adjust the concentration of the ore pulp to be 60-65%, adjusting the pH of the ore pulp to be 6.5-7 by using sulfuric acid, adding 10-20kg/t of sodium sulfite, at the temperature of 40-50 ℃, carrying out acidification treatment for 4-6h, carrying out filter pressing and dehydration after the acidification is finished, naturally piling and airing a filter cake for 20-30 days after the dehydration, and airing until the water content is 10-12%;
2) drying and activating treatment: drying and dehydrating the cyaniding gold extraction waste residue obtained in the step 1) by adopting a rotary kiln, drying for 4-6h at the temperature of 200 ℃ and 300 ℃ by taking sulfur dioxide and carbon dioxide as activating agents, wherein the water content is 5-8% after drying, and the pH value is 5.5-6;
3) and (3) mixed flotation: adding water into the cyaniding gold extraction waste residue obtained in the step 2) to adjust the concentration of the ore pulp to be 30-35%, adding a mixed collecting agent into a flotation machine to perform closed-circuit flotation, and enriching copper, lead, zinc, gold, silver, sulfur, iron and the like through primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to produce a mixed flotation concentrate and a mixed flotation tailing, wherein the mixed flotation tailing is used as a building material production raw material;
4) separation and flotation: adding water into the mixed concentrate obtained in the step 3) to adjust the concentration of the ore pulp to be 30-35%, adjusting the pH of the ore pulp to be 9.5-10.5 by using lime, adding 800g/t of activated carbon, stirring for 4-6h, adding a butyl ammonium black agent collecting agent into the ore pulp after stirring according to 200g/t of activated carbon, performing closed-loop flotation, and performing primary roughing, secondary closed-loop scavenging and secondary closed-loop concentration to obtain polymetallic concentrate containing 2-5g/t of gold, 50-60g/t of silver, 8-10% of copper, 6-8% of lead, 5-6% of zinc, 18-20% of sulfur and 47-52% of sulfur, wherein the polymetallic concentrate is used as a non-ferrous smelting raw material to extract various valuable metals;
5) roasting to prepare acid: boiling roasting the high-grade sulfur concentrate obtained in the step 4), controlling the temperature of the roasting furnace to be 800-900 ℃ in a reducing atmosphere, purifying roasting flue gas and then using the roasting flue gas for producing industrial sulfuric acid, wherein the roasted slag produced by roasting contains 1.5-2.5g/t of gold, 10-15g/t of silver, 0.1-0.15% of copper, 0.05-0.06% of lead, 0.05-0.06% of zinc and 0.5-0.8% of sulfur;
6) gold flotation of the cinder: the cinder obtained in the step 5) is slurried by water until the concentration of ore slurry is 60-65%, the adding amount of sodium hydrosulfide is 500g/t, the ore grinding time is controlled to be 15-20min, the proportion of the ore grinding fineness to 400 meshes is 90-95%, the ore slurry obtained by ore grinding is slurried by water until the concentration of the ore slurry is 30-35%, and the butyl ammonium black collecting agent is added according to the proportion of 150g/t, adding a No. 2 oil foaming agent according to 30-50g/t, performing closed-circuit flotation, and performing primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain gold concentrate containing 20-40g/t of gold, 50-60g/t of silver, 2-4% of copper, 1-2% of lead, 1-2% of zinc, 8-10% of sulfur and iron concentrate containing 0.2-0.3% of sulfur and 62-68% of iron.
Wherein, in the step 2), the consumption of sulfur dioxide is 10-20kg/t, and the consumption of carbon dioxide is 10-20 kg/t; in the step 3), the mixed collecting agent is formed by mixing butyl xanthate and butyl ammonium black according to the mass ratio of (1.8-2.2) to 1, and the using amount of the mixed collecting agent is 80-120 g/t.
The invention has the beneficial effects that: the invention relates to a process method for comprehensively recovering valuable elements from cyaniding gold extraction waste residues, which recycles the cyaniding gold extraction waste residues, recovers the valuable elements such as Fe, S, Cu, Pb, Zn, Au, Ag and the like from the cyaniding gold extraction waste residues, fully utilizes resources, improves the comprehensive utilization effect of the resources, improves the economic benefit and reduces the environmental pollution.
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 recovering valuable elements from cyaniding gold extraction waste residues comprises the following steps:
1) acidifying pretreatment: adding water into cyaniding gold extraction tailings to adjust the concentration of the ore pulp to be 60%, adjusting the acidity pH of the ore pulp to be 6.5 by using sulfuric acid, adding 10kg/t of sodium sulfite, carrying out acidification treatment for 4h at the temperature of 40 ℃, carrying out filter pressing and dehydration after acidification, naturally piling and airing filter cakes for 20 days after dehydration until the water content is 10%;
2) drying and activating treatment: drying and dehydrating the cyaniding gold extraction waste residue produced in the one step by adopting a rotary kiln, drying for 4 hours at the temperature of 200 ℃ by taking sulfur dioxide and carbon dioxide as activating agents, wherein the sulfur dioxide is 10kg/t, the carbon dioxide is 10kg/t, the water content is 5% after drying, and the pH is 5.5;
3) and (3) mixed flotation: adding water into the cyaniding gold extraction waste residue produced in the second step to adjust the concentration of the ore pulp to 30-35%, mixing collecting agents according to the proportion of butyl xanthate to butyl ammonium black powder to be 1.8:1, adding the mixture into a flotation machine according to 80g/t, carrying out closed-circuit flotation, and enriching copper, lead, zinc, gold, silver, sulfur, iron and the like through primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to produce mixed flotation concentrate and mixed flotation tailings, wherein the mixed flotation tailings are used as building material production raw materials; the components of the bulk flotation concentrate are Cu0.58%, Pb0.46%, Zn0.42%, Au1.00g/t, Ag20.00g/t, S46.8% and Fe42.0%, and the bulk flotation concentrate is treated separately;
4) separation and flotation: adding water into the mixed concentrate produced in the three steps to adjust the concentration of the ore pulp to be 30%, adjusting the acidity pH of the ore pulp to be 9.5 by using lime, adding 500g/t of activated carbon, stirring for 4h, adding a butyl ammonium black agent collecting agent into the ore pulp after stirring according to 150g/t, performing closed-circuit flotation, and performing primary rough concentration, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain polymetallic concentrate containing 2g/t of gold, 50g/t of silver, 8% of copper, 6% of lead, 5% of zinc and 18% of sulfur and high-grade sulfur concentrate containing 47% of sulfur, wherein the polymetallic concentrate is used as a non-ferrous smelting raw material to extract various valuable metals;
5) roasting to prepare acid: carrying out fluidized bed roasting on the high-grade sulfur concentrate, controlling the temperature of a roasting furnace to be 800 ℃ in a reducing atmosphere, installing a 25t/h waste heat boiler at the outlet of the roasting furnace of a 200kt/a pyrite acid making system, producing 3.8MPa medium-pressure steam, and pushing the steam to a 6000KW steam turbine generator to generate power under full load; the roasting flue gas is purified, secondarily converted and absorbed and the like to produce industrial sulfuric acid, and the roasting slag produced by roasting contains 1.5g/t of gold, 10g/t of silver, 0.10% of copper, 0.05% of lead, 0.05% of zinc, 0.5% of sulfur and 61.30% of iron;
6) gold flotation of the cinder: the cinder produced in the five steps is subjected to size mixing by water until the concentration of ore pulp is 60%, the adding amount of sodium hydrosulfide is 300g/t, the ore grinding time is controlled for 15min, the ore grinding fineness-400 meshes reaches 90%, the ore pulp obtained by ore grinding is subjected to size mixing by water until the concentration of the ore pulp is 30%, a butyl ammonium black agent collecting agent is added according to 150g/t, a No. 2 oil foaming agent is added according to 30g/t, closed-loop flotation is carried out, and gold concentrate containing 20g/t, silver containing 50g/t, copper containing 2%, lead containing 1%, zinc containing 1%, sulfur containing 8% and iron concentrate containing 0.2% and iron containing 62% are obtained through primary rough concentration, secondary closed-loop scavenging and secondary closed-loop concentration, so that the high-quality iron standard is achieved, the gold concentrate enters a cyaniding gold extraction production system to extract gold and silver, and iron concentrate is used.
Example 2
A method for recovering valuable elements from cyaniding gold extraction waste residues comprises the following steps:
1) acidifying pretreatment: adding water into cyaniding gold extraction tailings to adjust the concentration of the ore pulp to be 60-65%, adjusting the acidity pH of the ore pulp to be 6.8 by using sulfuric acid, adding 15kg/t of sodium sulfite, carrying out pressure filtration and dehydration after acidification is finished, naturally piling and airing filter cakes for 25 days after dehydration till the water content is 11%;
2) drying and activating treatment: drying and dehydrating the cyaniding gold extraction waste residue produced in the one step by adopting a rotary kiln, drying for 5 hours at the temperature of 250 ℃ by taking sulfur dioxide and carbon dioxide as activating agents, wherein the sulfur dioxide is 15kg/t, the carbon dioxide is 15kg/t, the water content is 6.5%, and the pH is 5.8;
3) and (3) mixed flotation: adding water into the cyaniding gold extraction waste residue produced in the second step to adjust the concentration of the ore pulp to 33%, mixing collecting agents according to the proportion of butyl xanthate to butyl ammonium black powder to 2:1, adding the mixture into a flotation machine according to 100g/t, performing closed-circuit flotation, and enriching copper, lead, zinc, gold, silver, sulfur, iron and the like through primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration to produce mixed flotation concentrate and mixed flotation tailings, wherein the mixed flotation tailings are used as building material production raw materials; the components of the bulk flotation concentrate are Cu0.68%, Pb0.56%, Zn0.52%, Au1.20g/t, Ag23.00g/t, S47.5% and Fe43.0%, and the bulk flotation concentrate is treated separately;
4) separation and flotation: adding water into the mixed concentrate produced in the three steps to adjust the concentration of the ore pulp to 33%, adjusting the acidity pH of the ore pulp to 10.0 by using lime, adding 650g/t of activated carbon, stirring for 5h, adding a butyl ammonium black agent collecting agent into the ore pulp after stirring according to 180g/t, performing closed-circuit flotation, and performing primary rough concentration, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain polymetallic concentrate containing 3.5g/t of gold, 55g/t of silver, 9% of copper, 7% of lead and 5.5% of zinc, 19% of sulfur and high-grade sulfur concentrate containing 49.5% of sulfur, wherein the polymetallic concentrate is used as a non-ferrous smelting raw material to extract various valuable metals;
5) roasting to prepare acid: carrying out fluidized bed roasting on the high-grade sulfur concentrate, controlling the temperature of a roasting furnace to be 850 ℃ in a reducing atmosphere, installing a 25t/h waste heat boiler at the outlet of the roasting furnace of a 200kt/a pyrite acid making system, producing 3.8MPa medium-pressure steam, and pushing the steam to a 6000KW steam turbine generator to generate power under full load; the roasting flue gas is purified, secondarily converted and secondarily absorbed and the like to produce industrial sulfuric acid, and the roasting slag produced by roasting contains 2.0g/t of gold, 13g/t of silver, 0.13% of copper, 0.05% of lead, 0.05% of zinc and 0.6% of sulfur;
6) gold flotation of the cinder: and (2) carrying out closed-loop flotation on the roasted slag produced in the five steps by adopting water to adjust the pulp concentration to 63% and adding sodium hydrosulfide at 400g/t, controlling the ore grinding time to be 18min, and controlling the ore grinding fineness to reach 93% when minus 400 meshes, and then adjusting the pulp obtained by ore grinding to 33% by adopting water, adding a butyl ammonium black agent collecting agent at 180g/t, adding a No. 2 oil foaming agent at 40g/t, and carrying out first-stage rough concentration, second-stage closed-loop scavenging and second-stage closed-loop concentration to obtain gold concentrate containing 30g/t, 55g/t silver, 3% copper, 1.5% lead, 1.5% zinc, 9% sulfur and iron concentrate containing 0.25% sulfur and 65% iron, so as to achieve the standard of high-quality iron concentrate. Gold concentrate enters a cyaniding gold extraction production system to extract gold and silver, and iron concentrate powder is used as a steel smelting raw material.
Example 3
A method for recovering valuable elements from cyaniding gold extraction waste residues comprises the following steps:
1) acidifying pretreatment: adding water into cyaniding gold extraction tailings to adjust the concentration of the ore pulp to be 60-65%, adjusting the acidity pH of the ore pulp to be 7.0 by using sulfuric acid, adding 20kg/t of sodium sulfite, carrying out pressure filtration and dehydration at the temperature of 50 ℃ for 6h after acidification, naturally piling and airing filter cakes for 30 days after dehydration until the water content is 12%;
2) drying and activating treatment: drying and dehydrating the cyaniding gold extraction waste residue produced in the one step by adopting a rotary kiln, drying for 6 hours at the temperature of 300 ℃ by taking sulfur dioxide and carbon dioxide as activating agents, wherein the sulfur dioxide is used in an amount of 20kg/t and the carbon dioxide is used in an amount of 20kg/t, and the dried waste residue has the water content of 8% and the pH value of 6.0;
3) and (3) mixed flotation: adding water into the cyaniding gold extraction waste residue produced in the second step to adjust the concentration of the ore pulp to 30-35%, adding a mixed collecting agent according to the proportion of butyl xanthate to butyl ammonium black powder to 2.2:1 into a flotation machine according to 120g/t, carrying out closed-circuit flotation, carrying out primary roughing, secondary closed-circuit scavenging and secondary closed-circuit concentration, enriching copper, lead, zinc, gold, silver, sulfur, iron and the like to produce a mixed flotation concentrate and a mixed flotation tailing, and using the mixed flotation tailing as a building material production raw material; the components of the bulk flotation concentrate are Cu0.78%, Pb0.66%, Zn0.62%, Au2.00g/t, Ag25.00g/t, S49.8% and Fe44.0%, and the bulk flotation concentrate is treated separately;
4) separation and flotation: adding water into the mixed concentrate produced in the three steps to adjust the concentration of the ore pulp to 35%, adjusting the acidity pH of the ore pulp to 10.5 by using lime, adding 800g/t of activated carbon, stirring for 6h, adding a butyl ammonium black agent collecting agent into the ore pulp after stirring according to 200g/t, performing closed-circuit flotation, and performing primary rough concentration, secondary closed-circuit scavenging and secondary closed-circuit concentration to obtain polymetallic concentrate containing 5g/t of gold, 60g/t of silver, 10% of copper, 8% of lead, 6% of zinc and 20% of sulfur and high-grade sulfur concentrate containing 52% of sulfur, wherein the polymetallic concentrate is used as a non-ferrous smelting raw material to extract various valuable metals;
5) roasting to prepare acid: carrying out fluidized bed roasting on the high-grade sulfur concentrate, controlling the temperature of a roasting furnace to be 800-900 ℃ in a reducing atmosphere, installing a 25t/h waste heat boiler at the outlet of the roasting furnace of a 200kt/a pyrite acid making system, producing 3.8MPa medium-pressure steam, and pushing the steam to a 6000KW steam turbine generator to generate power under full load; the roasting flue gas is purified, secondarily converted and absorbed and the like to produce industrial sulfuric acid, and the roasting slag produced by roasting contains 2.5g/t of gold, 15g/t of silver, 0.15% of copper, 0.06% of lead, 0.06% of zinc and 0.8% of sulfur;
6) gold flotation of the cinder: and (2) carrying out closed-loop flotation on the roasted slag produced in the five steps by adopting water to adjust the pulp concentration to 65% and adding 500g/t of sodium hydrosulfide, controlling the ore grinding time to be 20min, and controlling the ore grinding fineness to 95% when minus 400 meshes are achieved, then carrying out pulp adjustment on the ore pulp obtained by ore grinding to 35% of the ore pulp concentration by adopting water, adding a butyl ammonium black agent collecting agent according to 200g/t, adding a No. 2 oil foaming agent according to 50g/t, and carrying out first-stage rough concentration, second-stage closed-loop scavenging and second-stage closed-loop concentration to obtain gold concentrate containing 40g/t, silver containing 60g/t, copper containing 4%, lead containing 2%, zinc containing 2%, gold concentrate containing 10% of sulfur, iron concentrate containing 0.3% of sulfur and 68% of iron, so as. Gold concentrate enters a cyaniding gold extraction production system to extract gold and silver, and iron concentrate powder is used as a steel smelting raw material.
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 (4)
1. A method for recovering valuable elements from cyaniding gold extraction waste residues is characterized by comprising the following steps:
1) acidifying pretreatment: adding water into cyaniding gold extraction tailings to adjust the concentration of the ore pulp to be 60-65%, adjusting the pH of the ore pulp to be 6.5-7 by using sulfuric acid, adding 10-20kg/t of sodium sulfite, carrying out acidification treatment for 4-6h at the temperature of 40-50 ℃, then carrying out filter pressing and dehydration, naturally piling and airing a filter cake for 20-30 days after dehydration until the water content is 10-12%;
2) drying and activating treatment: drying and dehydrating the cyaniding gold extraction waste residue obtained in the step 1) by adopting a rotary kiln, drying for 4-6h at the temperature of 200 ℃ and 300 ℃ by taking sulfur dioxide and carbon dioxide as activating agents, wherein the water content is 5-8% after drying, and the pH value is 5.5-6;
3) and (3) mixed flotation: adding water into the cyaniding gold extraction waste residue obtained in the step 2) to adjust the concentration of the ore pulp to be 30-35%, adding a mixed collecting agent into a flotation machine to perform closed-circuit flotation, and producing a mixed flotation concentrate and a mixed flotation tailing;
4) separation and flotation: adding water into the mixed concentrate obtained in the step 3) to adjust the concentration of the ore pulp to be 30-35%, adjusting the pH of the ore pulp to be 9.5-10.5 by using lime, adding 500-800g/t of activated carbon, stirring for 4-6h, adding a butyl ammonium black agent collecting agent into the ore pulp after stirring according to 200g/t of activated carbon, and performing closed-loop flotation to obtain multi-metal concentrate containing 2-5g/t of gold, 50-60g/t of silver, 8-10% of copper, 6-8% of lead, 5-6% of zinc, 18-20% of sulfur and high-grade sulfur concentrate containing 47-52% of sulfur;
5) roasting to prepare acid: carrying out fluidized bed roasting on the high-grade sulfur concentrate obtained in the step 4), and controlling the temperature of a roasting furnace to be 800-900 ℃ in a reducing atmosphere to prepare cinder;
6) gold flotation of the cinder: and (3) the cinder obtained in the step 5) is subjected to slurry mixing by using water until the concentration of ore pulp is 60-65%, the adding amount of sodium hydrosulfide is 500g/t, the ore grinding time is controlled to be 15-20min, the proportion of the ore grinding fineness to 400 meshes is 90-95%, the ore pulp obtained by ore grinding is subjected to slurry mixing by using water until the concentration of the ore pulp is 30-35%, a butyl ammonium black agent collecting agent is added according to the proportion of 150-200g/t, and a No. 2 oil foaming agent is added according to the proportion of 30-50g/t, and closed-loop flotation is carried out to obtain gold concentrate and iron concentrate.
2. The method as claimed in claim 1, wherein in step 2), the amount of sulfur dioxide is 10-20kg/t and the amount of carbon dioxide is 10-20 kg/t.
3. The method according to claim 1, wherein in the step 3), the mixed collector is formed by mixing butyl xanthate and butyl ammonium black according to a mass ratio of (1.8-2.2): 1; the dosage of the mixed collector is 80-120 g/t.
4. The method as claimed in claim 1, wherein in step 6), the gold concentrate contains 20-40g/t of gold, 50-60g/t of silver, 2-4% of copper, 1-2% of lead, 1-2% of zinc and 8-10% of sulfur; the sulfur content of the iron ore concentrate is 0.2-0.3%, and the iron content is 62-68%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604673A (en) * | 2021-08-11 | 2021-11-05 | 山东国大黄金股份有限公司 | Method for extracting gold from cyanidation tailings by sulfuric acid curing roasting |
| CN115430516A (en) * | 2022-08-31 | 2022-12-06 | 云南黄金矿业集团股份有限公司 | Method for treating pyrite roasting slag water washing liquid containing gold, silver and copper |
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| CN113604673A (en) * | 2021-08-11 | 2021-11-05 | 山东国大黄金股份有限公司 | Method for extracting gold from cyanidation tailings by sulfuric acid curing roasting |
| CN113604673B (en) * | 2021-08-11 | 2022-09-20 | 山东国大黄金股份有限公司 | Method for extracting gold from sulfuric acid curing roasting cyanidation tailings |
| CN115430516A (en) * | 2022-08-31 | 2022-12-06 | 云南黄金矿业集团股份有限公司 | Method for treating pyrite roasting slag water washing liquid containing gold, silver and copper |
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| CN111905920B (en) | 2022-01-25 |
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