Method for treating a carbonaceous arsenic gold concentrate in conjunction with a polymetallic ore flotation copper concentrate

Abstract

The present application belongs to the technical field of gold dressing, and relates to a method for cooperatively processing a copper concentrate by flotation of a carbon-arsenic-containing gold concentrate and a polymetallic ore, comprising the following steps: (1) production of the polymetallic ore; (2) primary alkali leaching fine grinding technology; (3) secondary cyanidation inhibition treatment technology; (4) tertiary flotation recovery of copper concentrate technology; and (5) quaternary roasting acid leaching cyanidation gold extraction technology. The present application cooperatively floats and smelts the carbon-arsenic-containing gold concentrate and the polymetallic ore, effectively utilizes the carbon in the carbon-arsenic-containing gold concentrate in the flotation process, and makes the carbon enter the copper concentrate, thereby eliminating the influence of carbon on gold recovery in the carbon-arsenic-containing gold concentrate by using the roasting cyanidation process; at the same time, the roasting cyanidation process is used to treat the tailings of copper selection, so that gold, silver and copper are efficiently recovered, the process technical conditions are simple, the operation is convenient, the working environment is friendly, the mineral resources can be high-value utilization, and good economic benefits are obtained.

Description

Technical Field

[0001] This invention belongs to the field of gold beneficiation and smelting technology, and particularly relates to a method for co-processing carbon-containing arsenic gold concentrate with polymetallic mineral flotation copper concentrate. Background Technology

[0002] Carbon-containing arsenic gold concentrate is a complex gold concentrate that is difficult to smelt. This type of concentrate is characterized by the presence of elements such as carbon and arsenic, with gold and silver primarily encapsulated by arsenopyrite. Conventional cyanidation processes result in extremely low gold and silver recovery rates. This type of mineral is often processed using a two-stage roasting system. However, due to the light weight of the carbonaceous minerals, the residence time within the furnace is too short due to the influence of bottom blast and system negative pressure. Carbon is easily blown out of the furnace with the flue gas, resulting in an unsatisfactory decarburization rate in the two-stage roasting system. Furthermore, because unburned carbon has adsorption properties, it enters the cyanidation system during gold extraction and forms a large amount of adsorption on gold, thus affecting the gold recovery rate during cyanidation. Therefore, developing new technologies for the comprehensive recovery of valuable elements from carbon-containing arsenic gold concentrates and solving a series of key technical challenges, such as the low comprehensive utilization rate of valuable elements in carbon-containing arsenic gold concentrates, is urgently needed.

[0003] Meanwhile, with the gradual improvement of the comprehensive utilization rate of mineral resources, conventional gold concentrate is processed using the direct cyanidation gold extraction process. After gold and silver extraction, the cyanidation tailings contain less than 1 wt% copper. Most gold smelting enterprises have implemented multi-element flotation technology for cyanidation tailings, producing a multi-metal mixed concentrate containing less than 10 wt% copper, 3 wt% lead, and 5 wt% zinc. Due to the low copper content of the concentrate, it is difficult to sell it as copper concentrate, resulting in low sales value and low profits. Therefore, further developing efficient processing technology for multi-metal mixed concentrates to improve concentrate quality and increase the comprehensive utilization rate of resources is of profound significance.

[0004] In conclusion, actively developing technologies to further improve the comprehensive utilization of resources from carbonaceous arsenic-gold concentrate and polymetallic minerals produced by flotation of cyanide gold extraction tailings, and realizing the high-value recovery of valuable metals from minerals, is of paramount importance. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this invention provides a method for co-processing carbon-containing arsenic gold concentrate with polymetallic copper concentrate flotation. The specific technical solution is as follows:

[0006] A method for co-processing carbon-containing arsenic-gold concentrate with polymetallic mineral flotation copper concentrate includes the following steps:

[0007] (1) Production of polymetallic minerals: After adjusting the slurry concentration, activating with sulfuric acid, adding collectors and frothers, the cyanide tailings are subjected to a flotation process of primary roughing, secondary scavenging, and secondary cleaning to activate copper minerals and other minerals, thus obtaining polymetallic minerals.

[0008] (2) Primary alkaline leaching and fine grinding technology: The carbon-containing arsenic gold concentrate and the polymetallic ore obtained in step (1) are mixed and configured at a mass ratio of 1:8 to 10. Then, additives are added, the slurry concentration is adjusted, and the ore is ground to obtain a grinding slurry with a grinding fineness of -400 mesh reaching 80 to 90%.

[0009] (3) Secondary cyanide inhibition treatment technology: Sodium cyanide is added to the grinding slurry produced in step (2) and the slurry concentration is adjusted. Cyanide inhibition treatment is carried out at a temperature of 10-30℃ to obtain cyanide-inhibited slurry.

[0010] (4) Three-stage flotation technology for recovering copper concentrate: The cyanide-inhibited slurry produced in step (3) is adjusted to a certain concentration, followed by collector flotation, primary roughing, secondary scavenging, and secondary cleaning flotation process to obtain scraped froth and copper tailings.

[0011] (5) Four-stage roasting, acid leaching and cyanidation gold extraction technology: The copper tailings produced in step (4) are used to recover gold, silver and copper through sulfation roasting, acid leaching and cyanidation process technology.

[0012] The carbon-containing arsenic gold concentrate of this invention mainly consists of 5-8 wt% carbon, 3-5 wt% arsenic, 25-27 wt% sulfur, 60-80 g / t gold, 60-80 g / t silver, and 0.20-0.40 wt% copper; the cyanide tailings are cyanide tailings containing 0.8-1.5 wt% copper produced by the direct cyanidation gold extraction process of gold concentrate.

[0013] This invention mixes carbon-containing arsenic-resistant gold concentrate with polymetallic ore produced from cyanide tailings. The mixture is first subjected to a primary pre-alkaline fine grinding process, followed by a secondary cyanide inhibition process to further promote the deep inhibition of pyrite, arsenopyrite, and sphalerite. During the inhibition process, the carbon minerals are able to eliminate the influence of flotation reagents in the polymetallic ore on subsequent separation and flotation. Finally, a tertiary flotation process is used to recover copper concentrate, and a quaternary flotation tailings roasting and cyanide extraction process is used to produce gold and silver products. The technology of co-processing refractory gold concentrate containing arsenic and carbon to separate and float copper concentrate from polymetallic ores significantly improves the quality of copper concentrate. The main components of the copper concentrate are 8-10 g / t of gold, 18-22 wt% of copper, 2-3 wt% of carbon, 18-22 wt% of sulfur, and 0.1-0.2 wt% of arsenic. The copper concentrate can be sold externally, and the production cost is also greatly reduced. It solves the problem of incomplete carbon removal and reduced gold recovery rate in conventional roasting-cyanidation gold extraction processes for carbon-containing arsenic gold concentrate. At the same time, it can effectively recover precious metals gold and silver from the minerals, with gold, silver and copper recovery rates of 95-96 wt%, 90-95 wt%, and 90-92 wt%, respectively. It has good economic benefits and wide application value.

[0014] Further, in step (1), the concentration of the slurry is adjusted to 25-35 wt%; the pH of the sulfuric acid activation is 5-6; the collector is butyl xanthate and butylammonium black powder; the frother is No. 2 oil; the dosage of butyl xanthate is 100-130 g / t; the dosage of butylammonium black powder is 50-70 g / t; and the dosage of No. 2 oil is 30-40 g / t.

[0015] After the above step (1), a polymetallic ore containing 8-10 wt% copper, 3-4 wt% lead, and 5-6 wt% zinc can be obtained.

[0016] Further, in step (2), the additives are sodium hexametaphosphate, sodium carbonate, and sodium sulfite, with dosages of 600-1000 g / t, 1000-2000 g / t, and 2000-3000 g / t, respectively; the slurry concentration is adjusted to 60-65 wt%; and the grinding time is 8-10 minutes.

[0017] Furthermore, in step (3), the amount of sodium cyanide added is 500-800 g / t; the concentration of the slurry is adjusted to 10-20 wt%; and the cyanide inhibition treatment time is 8-10 hours.

[0018] Further, in step (4), the concentration of the slurry is adjusted to 10-20 wt%; the collector is butyl xanthate and butylammonium black powder, the frother is No. 2 oil, the dosage of butyl xanthate is 60-80 g / t, the dosage of butylammonium black powder is 20-40 g / t, and the dosage of No. 2 oil is 5-10 g / t; the flotation time of the collector is 8-15 minutes.

[0019] After processing in step (4) above, a copper concentrate with the following main components can be obtained: 8-10 g / t gold, 18-22 wt% copper, 2-3 wt% carbon, 18-22 wt% sulfur, and 0.1-0.2 wt% arsenic. The copper concentrate can be sold externally. Copper tailings with 8-10 g / t gold, 8-10 g / t silver, 0.8-1.0 wt% copper, 30-35 wt% sulfur, 0.3-0.5 wt% arsenic, and 0.2-0.5 wt% carbon can be obtained.

[0020] Further, in step (5), the sulfation roasting method is to wet-mix the copper tailings with water to obtain a slurry with a ore concentration of 65-70 wt%, and then put the slurry into a fluidized bed roasting furnace for roasting. The roasting temperature is 600-620℃ and the roasting time is 1-2 hours to obtain roasted slag.

[0021] Further, in step (5), the conditions for acid leaching of the roasted product calcined sand are: ore concentration 35-40 wt%, sulfuric acid concentration 1-2 wt%, temperature 60-80℃, and acid leaching time 2-4 hours, to obtain acid leaching residue and acid leaching solution.

[0022] Furthermore, the acid leaching solution is used to recover and produce cathode copper products via extraction electrowinning; the acid leaching residue is used to recover and produce gold and silver products via cyanide gold extraction. The recovery rates of gold, silver, and copper can reach 96 wt%, 95 wt%, and 92 wt%, respectively.

[0023] The beneficial effects of this invention are as follows:

[0024] (1) This invention effectively combines flotation and smelting processes, and uses fine grinding, adjustment and flotation technology for carbon-containing arsenic gold concentrate and polymetallic minerals. It solves the problem of mutual adhesion of copper, lead, zinc and sulfur minerals in polymetallic minerals produced by cyanide tailings flotation, and solves the technical problem of difficulty in effectively improving the copper grade of copper concentrate. In the flotation process, copper in polymetallic minerals is fully enriched and floats into copper concentrate, which is conducive to the high-value recovery of polymetallic minerals.

[0025] (2) The present invention uses carbon-containing arsenic gold concentrate and polymetallic minerals for co-flotation and smelting. During the flotation process, carbon in the carbon-containing arsenic gold concentrate is effectively utilized and carbon is introduced into the copper concentrate, eliminating the influence of carbon on gold recovery in the roasting cyanidation process of the carbon-containing arsenic gold concentrate. At the same time, the copper tailings are treated by roasting cyanidation process, so that gold, silver and copper can be recovered efficiently.

[0026] (3) The process technology of this invention is simple, easy to operate, and has a friendly working environment. It realizes the comprehensive recovery of valuable metals gold and copper in arsenic-containing carbon gold concentrate and polymetallic ores, enabling mineral resources to be utilized at high value and has good economic benefits. Detailed Implementation

[0027] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0028] Example 1:

[0029] The main components of the carbon-containing arsenic gold concentrate in this embodiment are 5wt% carbon, 3wt% arsenic, 25wt% sulfur, 60g / t gold, 60g / t silver, and 0.20wt% copper; the cyanide tailings are cyanide tailings containing 1wt% copper produced by the direct cyanidation gold extraction process of gold concentrate.

[0030] A method for co-processing carbon-containing arsenic-gold concentrate with polymetallic mineral flotation copper concentrate includes the following steps:

[0031] (1) Production of polymetallic ore: The cyanide tailings were adjusted to a pulp concentration of 25wt%, activated with sulfuric acid at pH=5, and butyl xanthate and butyl ammonium black powder were used as collectors and No. 2 oil as frother. The dosage of butyl xanthate was 100g / t, the dosage of butyl ammonium black powder was 50g / t, and the dosage of No. 2 oil was 30g / t. A flotation process of one roughing, two scavenging, and two cleaning was adopted to obtain a polymetallic concentrate containing 8wt% copper, 3wt% lead, and 5wt% zinc.

[0032] (2) Primary alkaline leaching and fine grinding technology: Carbon-containing arsenic gold concentrate and polymetallic ore obtained in step (1) are mixed at a mass ratio of 1:8. Sodium hexametaphosphate, sodium carbonate and sodium sulfite are used as additives with dosages of 600g / t, 1000g / t and 2000g / t, respectively. The slurry concentration is adjusted to 60wt% using flotation system liquid. Grinding is carried out in a mill with ceramic balls as grinding media for 8 minutes to obtain a grinding slurry with a grinding fineness of -400 mesh reaching 80%.

[0033] (3) Secondary cyanide inhibition treatment technology: The grinding slurry produced in step (2) is pumped into the cyanide inhibition device, sodium cyanide is added, the amount of sodium cyanide added is 500g / t, the slurry concentration is controlled at 10wt%, the temperature is 10℃, and the time is 8 hours to obtain cyanide inhibition treatment slurry.

[0034] (4) Three-stage flotation technology for recovering copper concentrate: The cyanide-inhibited slurry produced in step (3) is pumped into the pre-flotation reagent mixing tank, and the concentration of the feed ore is controlled at 10 wt%. Butyl xanthate and butyl ammonium black are used as collectors, and No. 2 oil is used as frother. The dosage of butyl xanthate is 60 g / t, the dosage of butyl ammonium black is 20 g / t, the dosage of No. 2 oil is 5 g / t, the flotation time is 10 minutes, and the flotation process of one roughing, two scavenging and two cleaning is adopted. The froth scraped off is copper concentrate. The main components of copper concentrate are gold 8 g / t, copper 18 wt%, carbon 2 wt%, sulfur 18 wt%, and arsenic 0.1 wt%. The copper concentrate is sold externally. The product in the tank is copper tailings, which contains gold 8 g / t, silver 8 g / t, copper 0.8 wt%, sulfur 30 wt%, arsenic 0.3 wt%, and carbon 0.2 wt%.

[0035] (5) Four-stage roasting, acid leaching and cyanidation gold extraction technology: The copper tailings produced in step (4) are used to recover gold, silver and copper through sulfation roasting, acid leaching and cyanidation process technology; specific method: the copper tailings are wet-mixed with water to obtain a mineral concentration of 65wt%, and then enter the fluidized bed roasting furnace. The roasting temperature is 600℃ and the roasting time is 1 hour; the acid leaching conditions of the roasted product are: mineral concentration of 35wt%, sulfuric acid concentration of 1wt%, temperature of 60℃ and acid leaching time of 2 hours; the acid leaching solution is used to extract and electrolyze to recover cathode copper products, and the acid leaching residue is used to recover gold and silver products through cyanidation gold extraction process. The gold, silver and copper recovery rates reach 95wt%, 90wt% and 90wt% respectively.

[0036] Example 2

[0037] The main components of the carbon-containing arsenic gold concentrate in this embodiment are 6.5 wt% carbon, 4 wt% arsenic, 26 wt% sulfur, 70 g / t gold, 70 g / t silver, and 0.30 wt% copper; the cyanide tailings are cyanide tailings containing 1.1 wt% copper produced by the direct cyanidation gold extraction process of gold concentrate.

[0038] A method for co-processing carbon-containing arsenic-gold concentrate with polymetallic mineral flotation copper concentrate includes the following steps:

[0039] (1) Production of polymetallic ore: The cyanide tailings were adjusted to a pulp concentration of 30wt%, activated with sulfuric acid to pH=5.5, and butyl xanthate and butyl ammonium black powder were used as collectors, and No. 2 oil was used as frother. The dosage of butyl xanthate was 110g / t, the dosage of butyl ammonium black powder was 60g / t, and the dosage of No. 2 oil was 35g / t. A flotation process of one roughing, two scavenging and two cleaning was adopted to obtain a polymetallic ore containing 9wt% copper, 3.5wt% lead and 5.5wt% zinc.

[0040] (2) Primary alkaline leaching and fine grinding technology: Carbon-containing arsenic gold concentrate and polymetallic ore obtained in step (1) are mixed at a mass ratio of 1:9. Sodium hexametaphosphate, sodium carbonate and sodium sulfite are used as additives, with dosages of 800g / t, 1500g / t and 2500g / t respectively. The slurry concentration is adjusted to 62.5wt% using flotation system liquid. Grinding is carried out in a mill with ceramic balls as grinding media for 9 minutes to obtain a grinding slurry with a grinding fineness of -400 mesh reaching 85%.

[0041] (3) Secondary cyanide inhibition treatment technology: The grinding slurry produced in step (2) is pumped into the cyanide inhibition device, sodium cyanide is added, the amount of sodium cyanide added is 650g / t, the slurry concentration is controlled at 15wt%, the temperature is 20℃, and the time is 9 hours to obtain the cyanide inhibition treated slurry.

[0042] (4) Three-stage flotation technology for recovering copper concentrate: The cyanide-inhibited slurry produced in step (3) is pumped into the pre-flotation reagent mixing tank, and the concentration of the feed ore is controlled at 15wt%. Butyl xanthate and butyl ammonium black are used as collectors, and No. 2 oil is used as frother. The dosage of butyl xanthate is 70g / t, the dosage of butyl ammonium black is 30g / t, the dosage of No. 2 oil is 8g / t, the flotation time is 11 minutes, and the flotation process of one roughing, two scavenging and two cleaning is adopted. The froth scraped off is copper concentrate. The main components of copper concentrate are gold 9g / t, copper 20wt%, carbon 2.5wt%, sulfur 20wt%, and arsenic 0.15wt%. The copper concentrate is sold externally. The product in the tank is copper tailings, which contains gold 9g / t, silver 9g / t, copper 0.9wt%, sulfur 33wt%, arsenic 0.4wt%, and carbon 0.35wt%.

[0043] (5) Four-stage roasting, acid leaching and cyanidation gold extraction technology: The copper tailings produced in step (4) are used to recover gold, silver and copper through sulfation roasting, acid leaching and cyanidation process technology; specific method: the copper tailings are wet-mixed with water to obtain a mineral concentration of 67.5 wt%, and then enter the fluidized bed roasting furnace. The roasting temperature is 610℃ and the roasting time is 1.5 hours; the acid leaching conditions of the roasted product are: mineral concentration of 37.5 wt%, sulfuric acid concentration of 1.5 wt%, temperature of 70℃ and acid leaching time of 3 hours; the acid leaching solution is used to extract and electrowinning to recover cathode copper products, and the acid leaching residue is used to recover gold and silver products through cyanidation gold extraction process. The gold, silver and copper recovery rates reach 95.5 wt%, 92.5 wt% and 91 wt% respectively.

[0044] Example 3

[0045] The main components of the carbon-containing arsenic gold concentrate in this embodiment are 8wt% carbon, 5wt% arsenic, 27wt% sulfur, 80g / t gold, 80g / t silver, and 0.40wt% copper; the cyanide tailings are cyanide tailings containing 1wt% copper produced by the direct cyanidation gold extraction process of gold concentrate.

[0046] A method for co-processing carbon-containing arsenic-gold concentrate with polymetallic mineral flotation copper concentrate includes the following steps:

[0047] (1) Production of polymetallic ore: After adjusting the cyanide tailings pulp concentration to 35wt%, sulfuric acid was used to activate the pH to 6. Butyl xanthate and butyl ammonium black powder were used as collectors, and No. 2 oil was used as frother. The dosage of butyl xanthate was 130g / t, the dosage of butyl ammonium black powder was 70g / t, and the dosage of No. 2 oil was 40g / t. A flotation process of one roughing, two scavenging, and two cleaning was adopted to obtain a polymetallic ore containing 10wt% copper, 4.0wt% lead, and 6.0wt% zinc.

[0048] (2) Primary alkaline leaching and fine grinding technology: Carbon-containing arsenic gold concentrate and polymetallic ore obtained in step (1) are mixed at a mass ratio of 1:10. Sodium hexametaphosphate, sodium carbonate and sodium sulfite are used as additives, with dosages of 1000g / t, 2000g / t and 3000g / t respectively. The slurry concentration is adjusted to 65wt% using flotation system liquid. Grinding is carried out in a mill with ceramic balls as grinding media for 10 minutes to obtain a grinding slurry with a grinding fineness of -400 mesh reaching 90%.

[0049] (3) Secondary cyanide inhibition treatment technology: The grinding slurry produced in step (2) is pumped into the cyanide inhibition device, sodium cyanide is added, the amount of sodium cyanide added is 800g / t, the slurry concentration is controlled at 20wt%, the temperature is 30℃, and the time is 10 hours to obtain cyanide inhibition treatment slurry.

[0050] (4) Three-stage flotation technology for recovering copper concentrate: The cyanide-inhibited slurry produced in step (3) is pumped into the pre-flotation reagent mixing tank, and the concentration of the feed ore is controlled at 20wt%. Butyl xanthate and butyl ammonium black are used as collectors, and No. 2 oil is used as frother. The dosage of butyl xanthate is 80g / t, the dosage of butyl ammonium black is 40g / t, the dosage of No. 2 oil is 10g / t, the flotation time is 13 minutes, and the flotation process of one roughing, two scavenging and two cleaning is adopted. The froth scraped off is copper concentrate. The main components of copper concentrate are gold 10g / t, copper 22wt%, carbon 3wt%, sulfur 22wt%, and arsenic 0.2wt%. The copper concentrate is sold externally. The product in the tank is copper tailings, which contains gold 10g / t, silver 10g / t, copper 1.0wt%, sulfur 35wt%, arsenic 0.5wt%, and carbon 0.5wt%.

[0051] (5) Four-stage roasting, acid leaching and cyanidation gold extraction technology: The copper tailings produced in step (4) are used to recover gold, silver and copper through sulfation roasting, acid leaching and cyanidation process technology; specific method: the copper tailings are wet-mixed with water to obtain a mineral concentration of 70wt%, and then enter the fluidized bed roasting furnace. The roasting temperature is 620℃ and the roasting time is 2 hours; the acid leaching conditions of the roasted product are: mineral concentration of 40wt%, sulfuric acid concentration of 2wt%, temperature of 80℃ and acid leaching time of 4 hours; the acid leaching solution is used to extract and electrolyze to recover cathode copper products, and the acid leaching residue is used to recover gold and silver products through cyanidation gold extraction process. The gold, silver and copper recovery rates reach 96wt%, 95wt% and 92wt% respectively.

[0052] Therefore, the present invention has simple process technology, convenient operation, and friendly working environment. It realizes the comprehensive recovery of valuable metals gold and copper in arsenic-containing carbon gold concentrate and polymetallic ores, enabling the high-value utilization of mineral resources and having good economic benefits.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate, characterized in that, Includes the following steps: (1) Production of polymetallic minerals: After adjusting the slurry concentration, activating with sulfuric acid, adding collectors and frothers, the cyanide tailings are subjected to a flotation process of primary roughing, secondary scavenging and secondary cleaning to obtain polymetallic minerals containing 8-10 wt% copper, 3-4 wt% lead and 5-6 wt% zinc. (2) Primary alkaline leaching and fine grinding technology: The carbon-containing arsenic gold concentrate and the polymetallic ore obtained in step (1) are mixed at a mass ratio of 1:8~10, and then additives are added, the slurry concentration is adjusted, and the ore is ground to obtain a grinding slurry with a grinding fineness of -400 mesh reaching 80~90%. In step (2), the additives are sodium hexametaphosphate, sodium carbonate, and sodium sulfite. (3) Secondary cyanide inhibition treatment technology: Sodium cyanide is added to the grinding slurry produced in step (2) and the slurry concentration is adjusted. Cyanide inhibition treatment is carried out at a temperature of 10~30℃ to obtain cyanide-inhibited slurry. (4) Three-stage flotation technology for recovering copper concentrate: The cyanide-inhibited slurry produced in step (3) is adjusted to a certain concentration, followed by collector flotation, primary roughing, secondary scavenging, and secondary cleaning flotation process to obtain the scraped froth and copper tailings. The foam is copper concentrate, which contains 8-10 g / t of gold, 18-22 wt% of copper, 2-3 wt% of carbon, 18-22 wt% of sulfur, and 0.1-0.2 wt% of arsenic. The copper concentrate is sold externally. (5) Four-stage roasting, acid leaching and cyanidation gold extraction technology: The copper tailings produced in step (4) are used to recover gold, silver and copper through boiling roasting furnace sulfation roasting, acid leaching and cyanidation process technology.

2. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 1, characterized in that, In step (1), the concentration of the slurry is adjusted to 25-35 wt%; the pH of the sulfuric acid activation is 5-6.

3. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 1, characterized in that, In step (1), the collector is butyl xanthate and butylammonium black powder, the foaming agent is No. 2 oil, the dosage of butyl xanthate is 100~130g / t, the dosage of butylammonium black powder is 50~70g / t, and the dosage of No. 2 oil is 30~40g / t.

4. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 1, characterized in that, In step (2), the amounts of sodium hexametaphosphate, sodium carbonate and sodium sulfite in the additives are 600~1000g / t, 1000~2000g / t and 2000~3000g / t, respectively; and the slurry concentration is adjusted to 60~65wt.

5. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 1, characterized in that, In step (3), the amount of sodium cyanide added is 500~800g / t; the concentration of the slurry is adjusted to 10~20wt%; and the cyanide inhibition treatment time is 8~10 hours.

6. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 1, characterized in that, In step (4), the concentration of the slurry is adjusted to 10-20 wt%; the collector is butyl xanthate and butylammonium black powder, the frother is No. 2 oil, the dosage of butyl xanthate is 60-80 g / t, the dosage of butylammonium black powder is 20-40 g / t, and the dosage of No. 2 oil is 5-10 g / t; the flotation time of the collector is 8-15 minutes.

7. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 1, characterized in that, In step (5), the sulfation roasting method is to wet-mix the copper tailings with water to obtain a slurry with a ore concentration of 65-70 wt%, and then put the slurry into a fluidized bed roasting furnace for roasting. The roasting temperature is 600-620℃ and the roasting time is 1-2 hours to obtain roasted calcined sand.

8. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 7, characterized in that, In step (5), the conditions for acid leaching of the roasted product calcined sand are: ore concentration 35~40wt%, sulfuric acid concentration 1~2wt%, temperature 60~80℃, acid leaching time 2~4 hours, to obtain acid leaching residue and acid leaching solution.

9. The method for co-processing carbon-containing arsenic-gold concentrate with polymetallic ore flotation copper concentrate according to claim 8, characterized in that, The acid leaching solution is used to recover and produce cathode copper products through extraction and electrowinning; the acid leaching residue is used to recover and produce gold and silver products through cyanide gold extraction process.