Method for comprehensively recovering valuable elements from high-copper-lead-gold concentrate

Abstract

The invention belongs to the technical field of comprehensive recovery of complex multi-metal gold and silver concentrates, and relates to a method for comprehensively recovering valuable elements from high-copper-lead-gold concentrates, which comprises the following steps: (1) primary sulfur suppression flotation; (2) secondary copper-lead mixed separation gold concentrate separation flotation; (3) activating and floating the third-stage mixed tailings; and (4) extracting gold from the fourth-stage sulfur concentrate, and performing reduction roasting. The whole technological process is simple and smooth, the comprehensive recovery rate of the high-copper-lead-gold concentrate is high, the recovery rate of gold and the recovery rate of silver reach 95% or above and 90% or above respectively and are both increased by 8-10% compared with a conventional process, efficient recovery of valuable elements of the high-copper-lead-gold concentrate and comprehensive utilization of resources are achieved, and the economic benefits of enterprises are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of comprehensive recovery of complex multi-metallic gold and silver concentrates, and relates to a method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrates. Background Art

[0002] With the deepening of gold development, processed gold ore resources are decreasing, and the utilization of difficult-to-process gold ore is becoming more and more important. According to statistics, about 1 / 3 of the world's total gold production is produced from difficult-to-process gold mines, and the reserves of difficult-to-process gold ore account for 60% of the world's total gold. Among the proven gold reserves in my country, 30% are difficult-to-process gold mines. Therefore, the processing technology of difficult-to-process gold mines has become a key issue in the current gold industry.

[0003] Refractory gold ore is also called refractory gold ore, refractory gold ore or stubborn gold ore. It is often rich in impurities such as sulfur, arsenic, carbon, high copper and lead. The direct leaching rate of typical refractory gold ore is only 10% to 30%. The reason why refractory gold ore is difficult to leach is mainly due to: (1) physical mechanical encapsulation, chemical crystal solid solution and chemical coating, which prevents cyanide from contacting gold minerals; (2) the presence of cyanide and oxygen-consuming substances. Metal sulfides and oxides such as arsenic, copper, antimony, iron, manganese, nickel and cobalt have high solubility in solution and consume a large amount of cyanide and dissolved oxygen in the solution; (3) the presence of gold-robbing substances, such as carbonaceous substances and clay, which can adsorb gold complexes during leaching, and gold is "robbed"; (4) the presence of conductive minerals. Certain compounds formed by gold and conductive minerals such as tellurium, bismuth and antimony passivate the cathode dissolution of gold.

[0004] High-copper, lead and gold concentrate is a difficult-to-treat gold concentrate. Conventional cyanide leaching has an ideal effect, so people often use enhanced cyanidation, oxidative roasting leaching, pressurized oxidative leaching, bacterial oxidative leaching and other process methods to treat it. The gold recovery rate has been greatly improved, but there is a problem that the associated valuable elements copper and lead are not effectively and comprehensively recovered, resulting in a waste of resources. Comprehensive and efficient recycling of high-copper, lead and gold concentrate has become an important technical direction for the sustainable development of smelting enterprises. Summary of the invention

[0005] In view of the deficiencies of the above-mentioned prior art, the present invention provides a method for comprehensively recovering valuable elements from high-copper, lead and gold concentrates. The specific technical scheme is as follows:

[0006] A method for comprehensively recovering valuable elements from high-copper, lead and gold concentrates, comprising the following steps:

[0007] (1) Primary sulfur suppression flotation: adjusting the slurry concentration of high copper, lead and gold concentrate to 20-30wt%, then grinding, adding calcium hydroxide to adjust the pH value to 9-10 during the grinding process; adding sodium sulfite and stirring; then adding collector ethyl xanthate and frother 2# oil, adopting a primary roughing, secondary scavenging and secondary concentrating flotation process to obtain copper-lead mixed gold concentrate and gold-containing mixed tailings;

[0008] (2) Secondary copper-lead mixed gold concentrate separation and flotation: adjust the copper-lead mixed gold concentrate pulp concentration to 50-60wt%, add soda ash and sodium cyanide; adjust the pulp concentration to 20-30wt% after grinding for 20-30min, control the sodium cyanide concentration to 0.50-0.70wt%, and the leaching time to 2-4h; use ethyl dithiocarbamide as a collector, perform a primary roughing, secondary scavenging, and secondary concentrating process to obtain lead concentrate and copper concentrate;

[0009] (3) Activated flotation of three-stage mixed tailings: The gold-containing mixed tailings are slurried to a concentration of 50-60wt%, and the pH is adjusted to 4-5 for grinding. Copper sulfate is added during the grinding process, and then butyl xanthate is used as a collector and 2# oil is used as a frother. A primary roughing, secondary scavenging, and secondary concentrating flotation process is adopted to obtain low-gold-sulfur concentrate and flotation tailings;

[0010] (4) Gold extraction by reduction roasting of grade quaternary sulfur concentrate: the slurry concentration of the low-gold sulfur concentrate is adjusted to 35-40wt%, sodium hydroxide is added to adjust the pH value to 8-9, and ammonia water and sodium cyanide are added for cyanidation to obtain a leaching solution and a leaching tailing; the leaching tailing is subjected to high-temperature boiling reduction roasting to obtain industrial sulfuric acid and roasted sulfuric acid slag, the roasting temperature is 850-900°C, the roasting time is 1-3 hours, and the roasted sulfuric acid slag is the iron concentrate.

[0011] The high-copper-lead-gold concentrate of the present invention mainly comprises: Au 10-30 g / t, Ag 100-300 g / t, Cu 4.0-6.0 wt %, Pb 3.0-5.0 wt %, sulfur 35-40 wt %, and As 0.20-0.40 wt %. Step (1) can obtain a copper-lead mixed gold concentrate containing 8-12wt% copper, 6.0-10wt% lead, 200-600g / t silver and 20-60g / t gold, and a gold-containing mixed tailing containing 0.10-0.12wt% copper, 0.20-0.30wt% lead, 20-40g / t silver and 2-4.0g / t gold; step (2) can obtain a lead concentrate containing 40-50wt% lead, 0.5-1.0wt% copper, 1000-2000g / t silver and 1-3g / t gold, and a gold-containing mixed tailing containing 0.10-0.12wt% copper, 0.20-0.30wt% lead, 20-40g / t silver and 2-4.0g / t gold. The invention discloses a copper concentrate containing 18-22 wt% copper, 1-1.5 wt% lead, 200-400 g / t silver and 3-5.0 g / t gold. The step (3) can obtain a low-gold-sulfur concentrate containing 3-5.0 g / t gold and 46.50-48.50 wt% sulfur, and a flotation tailing containing 0.2-0.40 g / t gold and 0.4-0.6 wt% sulfur. The flotation tailing can be used as a raw material for building materials. The iron concentrate obtained by high-temperature boiling reduction roasting of the leached tailings in the step (4) can reach 63.0-65.0 wt% iron.

[0012] The present invention provides a method for comprehensively recovering valuable elements from high-copper, lead and gold concentrates, and realizes efficient recovery of valuable elements from high-copper, lead and gold concentrates and comprehensive utilization of resources through the integrated technology of sulfur-inhibiting flotation of copper-lead mixed gold concentrates - separation and flotation of copper-lead mixed gold concentrates to produce lead concentrates and copper concentrates - activation and flotation of mixed tailings to obtain sulfur concentrates - gold extraction and reduction roasting of sulfur concentrates to produce iron concentrates, thereby greatly improving the economic benefits of enterprises.

[0013] Furthermore, in the step (1), the amount of sodium sulfite added is 1-3 kg / t, the amount of collector ethyl xanthate added is 20-60 g / t, and the amount of foaming agent 2# oil added is 20-40 g / t.

[0014] Furthermore, in the step (1), the grinding fineness of -0.074 mm accounts for 75-85%, the stirring speed after adding sodium sulfite is 200-400 r / min, and the stirring time is 2-4 h.

[0015] Furthermore, in the step (2), the amount of soda ash added is 5.0-7.0 kg / t, the amount of sodium cyanide added is 5.0-7.0 kg / t, and the amount of ethyl thiocyanate added is 50-100 g / t.

[0016] Furthermore, in the step (2), the flotation system liquid is separated, and the gold and silver are recovered by zinc powder replacement-smelting process to produce gold ingots and silver ingots.

[0017] Furthermore, in the step (3), the amount of copper sulfate used is 500-700 g / t, the amount of butyl xanthate used is 800-1000 g / t, and the amount of 2# oil used is 50-100 g / t.

[0018] Furthermore, in the step (3), the grinding fineness of -0.037 mm accounts for 90 to 93%.

[0019] Furthermore, in the step (4), the amount of ammonia water added is 1-3 kg / t, the concentration of sodium cyanide is controlled at 0.15-0.20 wt%, and the cyanidation time is 24-36 h.

[0020] Furthermore, in step (4), the leaching solution is subjected to zinc powder replacement-smelting process to recover gold and silver.

[0021] The beneficial effects of the present invention are:

[0022] The invention adopts a sulfur-inhibiting flotation process to achieve effective recovery of associated valuable metal copper and lead minerals, thereby eliminating the problem of low recovery rate of copper and lead in cyanide tailings produced by traditional cyanidation process due to excessive grinding fineness, antimony mineral muddiness and increased oxidation degree; through the separation flotation process of copper-lead mixed gold concentrate, the recovery of gold, silver, copper and lead in the copper-lead mixed concentrate is achieved, and the recovery rate of gold, silver, copper and lead and the flotation recovery rate of antimony are improved by controlling the grinding fineness, the action time of the inhibitor and the selection of the collector; through the activation flotation sulfur concentrate of the mixed tailings, the front-end recovery of copper, lead, gold and silver minerals is eliminated, and the key problem of secondary gold encapsulation in the copper and lead minerals during the roasting process, which leads to a decrease in the subsequent cyanidation recovery rate of gold and silver; industrial sulfuric acid and iron concentrate are produced through the reduction roasting process of pyrite after gold extraction, and the integrated technology realizes the comprehensive recovery of sulfur and iron.

[0023] The whole process flow of the present invention is simple and smooth, and the comprehensive recovery rate of high-copper, lead and gold concentrate is high. The recovery rates of gold and silver reach 95% and 90% respectively, which are 8-10% higher than those of conventional processes. The high-efficiency recovery of valuable elements in high-copper, lead and gold concentrate and the comprehensive utilization of resources are achieved, and the economic benefits of the enterprise are greatly improved. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with embodiments. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] Embodiment 1:

[0026] A method for comprehensively recovering valuable elements from high-copper, lead and gold concentrates, comprising the following steps:

[0027] (1) Primary sulfur suppression flotation: The main components of high copper, lead and gold concentrate are: Au10g / t, Ag100g / t, Cu4.0wt%, Pb3.0wt%, sulfur 35wt%, As0.20wt%; the slurry concentration of high copper, lead and gold concentrate is adjusted to 20wt%, and then ground. During the grinding process, 5kg / t of calcium hydroxide is added, and the pH value is adjusted to 9; 1kg / t of sodium sulfite is added, and the grinding fineness is -0.074mm accounting for 8 0%, stirring speed 200r / min, stirring for 2h; then adding 20g / t of collector ethyl xanthate and 20g / t of frother 2# oil, adopting a primary roughing selection, secondary scavenging selection and secondary concentrating flotation process, to obtain a copper-lead mixed gold concentrate containing 8wt% copper, 6.0wt% lead, 200g / t silver and 20g / t gold, and a gold-containing mixed tailing containing 0.10wt% copper, 0.20wt% lead, 20g / t silver and 2g / t gold;

[0028] (2) Separation and flotation of secondary copper-lead mixed gold concentrate to produce lead concentrate and copper concentrate: adjusting the pulp concentration of copper-lead mixed gold concentrate to 50wt%, adding soda ash and sodium cyanide, the amount of soda ash added is 5.0kg / t, the amount of sodium cyanide added is 5.0kg / t, entering the grinding machine, grinding time is 20min, adjusting the pulp concentration to 20wt% after grinding, controlling the sodium cyanide concentration to 0.50wt%, leaching time is 2h, using ethyl thiocyanate as a collector, the amount of ethyl thiocyanate added is 50g / t, performing a primary roughing selection, secondary scavenging selection and secondary concentrating process, and obtaining a lead concentrate containing 40wt% lead, 0.5wt% copper, 1000g / t silver and 1g / t gold, and a copper concentrate containing 18wt% copper, 1wt% lead, 200g / t silver and 3g / t gold; the separation flotation system liquid adopts zinc powder replacement-smelting process to recover gold and silver, and produces gold ingots and silver ingots;

[0029] (3) Activated flotation sulfur concentrate from tertiary mixed tailings: The gold-containing mixed flotation tailings are slurried to a mineral concentration of 50wt%, and the pH is adjusted to 4 by roasting acid purification waste acid for grinding. During the grinding process, copper sulfate is added in an amount of 500g / t, and the grinding fineness of -0.037mm accounts for 90%. Butyl xanthate is used as a collector in an amount of 800g / t, and 2# oil is used as a frother in an amount of 50g / t. A primary roughing, secondary scavenging, and secondary concentrating flotation process is adopted to obtain a low-gold sulfur concentrate containing 3g / t gold and 46.50wt% sulfur, as well as a flotation tailing containing 0.2g / t gold and 0.4wt% sulfur. The flotation tailings are used as raw materials for building materials;

[0030] (4) Extracting gold from grade 4 sulfur concentrate by reduction roasting to produce iron concentrate: The slurry concentration of the low-gold sulfur concentrate is adjusted to 35wt%, sodium hydroxide is added to adjust the pH value to 8, 1kg / t of ammonia water is added, the concentration of sodium cyanide is controlled to 0.15wt%, the cyanidation time is 24h, and the leaching solution adopts zinc powder replacement-smelting process to recover gold and silver; the leached tailings are subjected to high-temperature boiling reduction roasting at a roasting temperature of 850℃ for 3 hours to produce industrial sulfuric acid and roasting sulfuric acid slag. The roasting sulfuric acid slag is the iron concentrate with an iron content of 63.0wt%.

[0031] Embodiment 2:

[0032] A method for comprehensively recovering valuable elements from high-copper, lead and gold concentrates, comprising the following steps:

[0033] (1) Primary sulfur suppression flotation: The main components of high copper, lead and gold concentrate are: Au 20g / t, Ag 200g / t, Cu 5.0wt%, Pb 4.0wt%, sulfur 37.5wt%, As 0.30wt%; the slurry concentration of high copper, lead and gold concentrate is adjusted to 25wt%, and then ground. During the grinding process, 5.5kg / t of calcium hydroxide is added, and the pH value is adjusted to 9.5; 2kg / t of sodium sulfite is added, and the grinding fineness is -0.074mm The mixture is stirred at a speed of 300 r / min and stirred for 3 hours; then 40 g / t of ethyl xanthate as a collector and 30 g / t of 2# oil as a frother are added, and a primary roughing, secondary scavenging and secondary concentrating flotation process is adopted to obtain a copper-lead mixed gold concentrate containing 10 wt% copper, 8.0 wt% lead, 400 g / t silver and 40 g / t gold, and a gold-containing mixed tailing containing 0.11 wt% copper, 0.25 wt% lead, 30 g / t silver and 3.0 g / t gold;

[0034] (2) Separation and flotation of secondary copper-lead mixed gold concentrate to produce lead concentrate and copper concentrate: adjusting the pulp concentration of copper-lead mixed gold concentrate to 55wt%, adding soda ash and sodium cyanide, the amount of soda ash added is 6.0kg / t, the amount of sodium cyanide added is 6.0kg / t, entering the grinding machine, grinding time is 25min, after grinding, the pulp concentration is adjusted to 25wt%, the sodium cyanide concentration is controlled to 0.60wt%, the leaching time is 3h, using ethyl thiocyanate as a collector, the amount of ethyl thiocyanate added is 75g / t, and a primary roughing selection, secondary scavenging selection and secondary concentrating process are carried out to obtain a lead concentrate containing 45wt% lead, 0.75wt% copper, 1500g / t silver and 2g / t gold, and a copper concentrate containing 20wt% copper, 1.25wt% lead, 300g / t silver and 4.0g / t gold; the separation flotation system liquid adopts zinc powder replacement-smelting process to recover gold and silver, and produces gold ingots and silver ingots;

[0035] (3) Activated flotation sulfur concentrate from tertiary mixed tailings: The gold-containing mixed flotation tailings are slurried to a mineral concentration of 55wt%, and the pH is adjusted to 4.5 by roasting acid purification waste acid, and grinding is performed. During the grinding process, copper sulfate is added in an amount of 600g / t, and the grinding fineness of -0.037mm accounts for 91.5%. Butyl xanthate is used as a collector in an amount of 900g / t, and 2# oil is used as a frother in an amount of 75g / t. A primary roughing, secondary scavenging, and secondary concentrating flotation process is adopted to obtain a low-gold sulfur concentrate containing 4.0g / t gold and 47.50wt% sulfur, as well as a flotation tailing containing 0.30g / t gold and 0.5wt% sulfur; the flotation tailings are used as raw materials for building materials;

[0036] (4) Extracting gold from the fourth-grade sulfur concentrate by reduction roasting to produce iron concentrate: The slurry concentration of the low-gold sulfur concentrate is adjusted to 37.5wt%, sodium hydroxide is added to adjust the pH value to 8, 2kg / t of ammonia water is added, the concentration of sodium cyanide is controlled to 0.18wt%, the cyanidation time is 30h, and the leaching solution adopts zinc powder replacement-smelting process to recover gold and silver; the leaching tailings are subjected to high-temperature boiling reduction roasting at a roasting temperature of 900°C for 2 hours to produce industrial sulfuric acid and roasting sulfuric acid slag. The roasting sulfuric acid slag is the iron concentrate with an iron content of 64.0wt%.

[0037] Embodiment 3:

[0038] A method for comprehensively recovering valuable elements from high-copper, lead and gold concentrates, comprising the following steps:

[0039] (1) Primary sulfur suppression flotation: The main components of high copper, lead and gold concentrate are: Au30g / t, Ag300g / t, Cu6.0wt%, Pb5.0wt%, sulfur40wt%, As0.40wt%; the slurry concentration of high copper, lead and gold concentrate is adjusted to 30wt%, and then ground. During the grinding process, 6kg / t of calcium hydroxide is added, and the pH value is adjusted to 10; 3kg / t of sodium sulfite is added, and the grinding fineness is -0.074mm, accounting for 8 0%, stirring speed 400r / min, stirring for 4h; then adding 60g / t of collector ethyl xanthate and 40g / t of frother 2# oil, adopting a primary roughing selection, secondary scavenging selection and secondary concentrating flotation process, to obtain a copper-lead mixed gold concentrate containing 12wt% copper, 10wt% lead, 600g / t silver and 60g / t gold, and a gold-containing mixed tailing containing 0.12wt% copper, 0.30wt% lead, 40g / t silver and 4.0g / t gold;

[0040] (2) Separation and flotation of secondary copper-lead mixed gold concentrate to produce lead concentrate and copper concentrate: adjusting the pulp concentration of copper-lead mixed gold concentrate to 60wt%, adding soda ash and sodium cyanide, the amount of soda ash added is 7.0kg / t, the amount of sodium cyanide added is 7.0kg / t, entering the grinding machine, grinding time is 30min, after grinding, adjusting the pulp concentration to 30wt%, controlling the sodium cyanide concentration to 0.70wt%, leaching time is 4h, using ethyl thiocyanate as a collector, the amount of ethyl thiocyanate added is 100g / t, and performing a primary roughing selection, secondary scavenging selection and secondary concentrating process to obtain a lead concentrate containing 50wt% lead, 1.0wt% copper, 2000g / t silver and 3g / t gold, and a copper concentrate containing 22wt% copper, 1.5wt% lead, 400g / t silver and 5.0g / t gold; the separation flotation system liquid adopts zinc powder replacement-smelting process to recover gold and silver, and produces gold ingots and silver ingots;

[0041] (3) Activated flotation sulfur concentrate from tertiary mixed tailings: The gold-containing mixed flotation tailings are slurried to a concentration of 60wt%, and the pH is adjusted to 5 by roasting acid purification waste acid for grinding. During the grinding process, copper sulfate is added in an amount of 700g / t, and the grinding fineness of -0.037mm accounts for 93%. Butyl xanthate is used as a collector in an amount of 1000g / t, and 2# oil is used as a frother in an amount of 100g / t. A primary roughing, secondary scavenging, and secondary concentrating flotation process is adopted to obtain a low-gold sulfur concentrate containing 5.0g / t gold and 48.50wt% sulfur, as well as a flotation tailing containing 0.40g / t gold and 0.6wt% sulfur; the flotation tailings are used as raw materials for building materials;

[0042] (4) Extracting gold from grade 4 sulfur concentrate by reduction roasting to produce iron concentrate: The slurry concentration of the low-gold sulfur concentrate is adjusted to 40wt%, sodium hydroxide is added to adjust the pH value to 8, 3kg / t of ammonia water is added, the concentration of sodium cyanide is controlled to 0.20wt%, the cyanidation time is 36h, and the leaching solution adopts zinc powder replacement-smelting process to recover gold and silver; the leached tailings are subjected to high-temperature boiling reduction roasting at a roasting temperature of 900°C for 2 hours to produce industrial sulfuric acid and roasting sulfuric acid slag. The roasting sulfuric acid slag is the iron concentrate with an iron content of 65.0wt%.

[0043] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrates, characterized in that: The steps include: (1) Primary sulfur suppression flotation: adjusting the slurry concentration of high copper, lead and gold concentrate to 20-30wt%, then grinding, adding calcium hydroxide to adjust the pH value to 9-10 during the grinding process; adding sodium sulfite and stirring; then adding collector ethyl xanthate and frother 2# oil, adopting a primary roughing, secondary scavenging and secondary concentrating flotation process to obtain copper-lead mixed gold concentrate and gold-containing mixed tailings; (2) Secondary copper-lead mixed gold concentrate separation and flotation: adjust the copper-lead mixed gold concentrate pulp concentration to 50-60wt%, add soda ash and sodium cyanide; adjust the pulp concentration to 20-30wt% after grinding for 20-30min, control the sodium cyanide concentration to 0.50-0.70wt%, and the leaching time to 2-4h; use ethyl dithiocarbamide as a collector, perform a primary roughing, secondary scavenging, and secondary concentrating process to obtain lead concentrate and copper concentrate; (3) Activated flotation of three-stage mixed tailings: The gold-containing mixed tailings are slurried to a concentration of 50-60wt%, and the pH is adjusted to 4-5 for grinding. Copper sulfate is added during the grinding process, and then butyl xanthate is used as a collector and 2# oil is used as a frother. A primary roughing, secondary scavenging, and secondary concentrating flotation process is adopted to obtain low-gold-sulfur concentrate and flotation tailings; (4) Gold extraction by reduction roasting of grade quaternary sulfur concentrate: the slurry concentration of the low-gold sulfur concentrate is adjusted to 35-40wt%, sodium hydroxide is added to adjust the pH value to 8-9, and ammonia water and sodium cyanide are added for cyanidation to obtain a leaching solution and a leaching tailing; the leaching tailing is subjected to high-temperature boiling reduction roasting to obtain industrial sulfuric acid and roasted sulfuric acid slag, the roasting temperature is 850-900°C, the roasting time is 1-3 hours, and the roasted sulfuric acid slag is the iron concentrate.

2. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 1, characterized in that: In the step (1), the amount of sodium sulfite added is 1-3 kg / t, the amount of collector ethyl xanthate added is 20-60 g / t, and the amount of foaming agent 2# oil added is 20-40 g / t.

3. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 2, characterized in that: In the step (1), the grinding fineness of -0.074 mm accounts for 75-85%, the stirring speed after adding sodium sulfite is 200-400 r / min, and the stirring time is 2-4 h.

4. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 1, characterized in that: In the step (2), the amount of soda ash added is 5.0-7.0 kg / t, the amount of sodium cyanide added is 5.0-7.0 kg / t, and the amount of ethyl thiocyanate added is 50-100 g / t.

5. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 4, characterized in that: In the step (2), the flotation system liquid is separated, and the gold and silver are recovered by zinc powder replacement-smelting process to produce gold ingots and silver ingots.

6. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 1, characterized in that: In the step (3), the amount of copper sulfate used is 500-700 g / t, the amount of butyl xanthate used is 800-1000 g / t, and the amount of 2# oil used is 50-100 g / t.

7. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 1, characterized in that: In the step (3), the grinding fineness of -0.037 mm accounts for 90-93%.

8. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 1, characterized in that: In the step (4), the amount of ammonia water added is 1-3 kg / t, the concentration of sodium cyanide is controlled at 0.15-0.20 wt%, and the cyanidation time is 24-36 h.

9. The method for comprehensive recovery of valuable elements from high-copper, lead and gold concentrate according to claim 8, characterized in that: In the step (4), the leaching solution is subjected to zinc powder replacement-smelting process to recover gold and silver.