System for efficiently recovering gold, silver and copper from complex gold ore gold extraction tailing broken carbon

Abstract

The utility model relates to a system for efficiently recovering gold, silver and copper from complex gold ore gold extraction tailing broken carbon, which comprises a ball mill, and an ore pulp pump and a grading cyclone which are sequentially connected with the ball mill, and an overflow port of the grading cyclone is sequentially connected with a medicament stirring barrel, a flotation system and a 1 # filter; a filter residue opening of the 1 # filter is sequentially connected with a novel ashing roasting furnace, a reduction smelting furnace, a copper-silver leaching stirring tank and a 2 # filter, a filtrate opening of the 2 # filter is sequentially connected with a silver chloride precipitation stirring tank and a 3 # filter, a filtrate opening of the 3 # filter is sequentially connected with a copper replacement stirring tank and a 4 # filter, and a filter residue opening of the 3 # filter is sequentially connected with a silver replacement stirring tank and a 5 # filter. Flotation equipment, ashing roasting equipment, reduction smelting equipment, selective leaching equipment and the like are ingeniously combined to form a complete complex gold ore gold extraction tailing broken carbon recovery system, and meanwhile, proper technological parameters are matched, so that high-efficiency recovery of valuable metals such as gold, silver and copper in complex broken carbon with high copper, high iron, high calcium and the like is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of metal recovery technology in gold-carrying crushed carbon from gold-pulp gold extraction tailings, specifically involving a system for efficient recovery of gold, silver and copper from crushed carbon in complex gold ore gold extraction tailings. Background Technology

[0002] In the gold industry, activated carbon is a key material widely used in the enrichment and recovery of gold and silver precious metals, especially in carbon leaching and heap leaching processes. Activated carbon works by adsorbing gold-cyanide complexes (Au(CN)₂) in the solution. - This process enables the efficient recovery of gold and silver precious metals. However, during use, activated carbon generates a large amount of carbon powder and fine carbon particles due to wear and breakage. These carbon fragments are characterized by small particle size, large specific surface area, and strong adsorption capacity, and contain a relatively high grade of gold and silver. However, due to the presence of a large amount of mineral-based impurities, the actual gold and silver content is relatively low.

[0003] There are approximately seventy carbon-in-pulp (CIP) plants nationwide. Large CIP plants can produce hundreds of tons of pulverized carbon annually, including fine pulverized carbon recovered from leaching tailings through safety screening and carbon sludge from carbon washing. These particles are larger than 32 mesh, with gold content ranging from 10 g / t to 200 g / t. There is also coarser pulverized carbon obtained after desorbing carbon screening, with a particle size below 18 mesh and a gold content exceeding 500 g / t. Due to their high impurity content, this pulverized carbon is unsuitable for return to the original process. Traditional treatment methods such as ashing roasting or forced-air combustion present challenges in controlling combustion temperature and airflow, leading to incomplete combustion of activated carbon and encapsulation by sintered impurities. This makes effective gold and silver recovery difficult in downstream hydrometallurgical processes, and the gold and silver are also emitted with the flue gas, resulting in resource waste.

[0004] Furthermore, the raw ore from some large gold mines' carbon-in-pulp plants contains high levels of easily leached components such as copper, iron, and sulfur. The recovered carbon fragments from the tailings contain not only a large amount of ore particles but also significant amounts of metals such as copper, iron, and calcium adsorbed within the fine activated carbon. How to efficiently recover gold and silver from these complex carbon fragments and maximize the extraction of valuable metals is one of the key research focuses for researchers. Although some progress has been made in existing research, the complexity of the composition limits the effectiveness of any single recovery method.

[0005] Currently, the technology described in the paper "Experimental Study and Industrial Practice of Gold Recovery from Crushed Coke"—which involves mixing crushed ore with raw ore for cyanide leaching and adsorption—has achieved certain technical indicators. However, the leaching rate of gold and silver precious metals in crushed charcoal from tailings of high-copper and high-iron charcoal slurry plants is less than 40% to 50%, while copper is completely lost, resulting in resource waste and impacting the technical and economic indicators of enterprises.

[0006] Based on the above problems, this utility model aims to provide a system for the efficient recovery of gold, silver and copper from the tailings and crushed coal of complex gold ore extraction, so as to solve the shortcomings of the existing technology, realize the efficient utilization of resources, and improve the economic and social benefits of enterprises. Utility Model Content

[0007] This invention provides a system for efficiently recovering gold, silver, and copper from crushed carbon residue in complex gold ore extraction tailings. It is mainly used to recover gold, silver, and copper from crushed carbon containing large amounts of metals such as copper, iron, and calcium, solving the problems of poor recovery effect and high recovery cost of existing processes.

[0008] The specific technical solution is as follows: A system for efficient recovery of gold, silver, and copper from the tailings and charcoal of complex gold ore extraction, comprising a ball mill, wherein the outlet of the ball mill is sequentially connected to a slurry pump and a classifying hydrocyclone, the sand outlet of the classifying hydrocyclone is connected to the inlet of the ball mill, the overflow outlet of the classifying hydrocyclone is sequentially connected to a reagent stirring tank, a flotation system, and a No. 1 filter, the slag outlet of the No. 1 filter is sequentially connected to a new type of ashing roasting furnace, a reduction smelting furnace, a copper-silver leaching stirring tank, and a No. 2 filter, the filtrate outlet of the No. 2 filter is sequentially connected to a silver chloride precipitation stirring tank and a No. 3 filter, the filtrate outlet of the No. 3 filter is sequentially connected to a copper displacement stirring tank and a No. 4 filter, and the slag outlet of the No. 3 filter is sequentially connected to a silver displacement stirring tank and a No. 5 filter.

[0009] Furthermore, preferably, the flotation system includes a rougher flotation machine, a scavenger flotation machine, and a cleaner flotation machine, with the discharge port of the reagent mixing tank connected to the feed port of the rougher flotation machine, and the concentrate outlet of the cleaner flotation machine connected to the feed port of filter #1.

[0010] The beneficial effects of this invention are as follows: This invention ingeniously combines flotation, ashing roasting, reduction smelting, and selective leaching equipment to form a complete system for recovering charcoal from tailings of complex gold ore extraction. With appropriate process parameters, it achieves efficient recovery of valuable metals such as gold, silver, and copper from complex charcoal containing high levels of copper, iron, and calcium. This not only significantly improves the recovery rate of gold, silver, and copper, avoiding the low gold and silver recovery rate and environmental pollution problems caused by interference from base metals such as copper, iron, and calcium in traditional processes, but also reduces production costs and improves resource utilization and enterprise economic benefits through precise control of process parameters. Furthermore, this system is not only suitable for the comprehensive utilization of charcoal from complex gold and silver ore extraction processes, but also for the efficient recovery of low-grade gold and silver precious metals from other charcoal, demonstrating strong adaptability and broad commercial prospects. It is of great significance for promoting the sustainable development of the gold metallurgical industry. Attached Figure Description

[0011] Figure 1This is an equipment diagram illustrating the efficient recovery of gold, silver, and copper from the tailings and crushed coal of complex gold ore extraction systems according to this utility model.

[0012] In the diagram: 1-Ball mill; 2-Slurry pump; 3-Classifying hydrocyclone; 4-Reagent mixing tank; 5-Flotation system; 51-Flotation rougher; 52-Flotation scavenger; 53-Flotation cleaner; 6-Filter #1; 7-New type of ashing and roasting furnace; 8-Reduction smelting furnace; 9-Copper-silver leaching mixing tank; 10-Filter #2; 11-Silver chloride precipitation mixing tank; 12-Filter #3; 13-Copper displacement mixing tank; 14-Filter #4; 15-Silver displacement mixing tank; 16-Filter #5. Detailed Implementation

[0013] To make the technical problems and solutions solved by this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0014] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] like Figure 1As shown, a system for efficient recovery of gold, silver, and copper from the tailings of complex gold ore extraction includes a ball mill 1. The discharge port of the ball mill 1 is connected to a slurry pump 2 and a classifying hydrocyclone 3. The underflow port of the classifying hydrocyclone 3 is connected to the feed port of the ball mill 1. The ball mill 1, the slurry pump 2, and the classifying hydrocyclone 3 together constitute a closed-loop grinding and classification system for crushing and classifying materials. The overflow port of the classifying hydrocyclone 3 is sequentially connected to a reagent stirring tank 4, a flotation system 5, and a No. 1 filter 6. The filter residue port of the No. 1 filter 6 is sequentially connected to a new type of ashing roasting furnace 7, a reduction smelting furnace 8, a copper-silver leaching stirring tank 9, and a No. 2 filter 10. The filtrate port of the No. 2 filter 10 is sequentially connected to a silver chloride precipitation stirring tank 11 and a No. 3 filter 12. The filtrate port of the No. 3 filter 12 is sequentially connected to a copper displacement stirring tank 13 and a No. 4 filter 14. The filter residue port of the No. 3 filter 13 is sequentially connected to a silver displacement stirring tank 15 and a No. 5 filter 16.

[0017] The flotation system 5 mentioned above includes a rougher flotation machine 51, a scavenger flotation machine 52, and a cleaner flotation machine 53. The discharge port of the reagent mixing tank 4 is connected to the feed port of the rougher flotation machine 51, and the concentrate outlet of the cleaner flotation machine 53 is connected to the feed port of the No. 1 filter 6.

[0018] It should be noted that the above-mentioned equipment are all existing equipment, and this application only relates to the application of these existing equipment, and does not involve any improvement of their structure.

[0019] The specific working principle of the above system for recovering crushed carbon from gold extraction tailings of complex gold ore is as follows:

[0020] The material to be processed is fed into ball mill 1 for crushing and grinding. After crushing and grinding, it is fed into classifying hydrocyclone 3 through slurry pump 2 to obtain fine particles of -100 mesh accounting for 65%~85%.

[0021] Fine-grained materials are conveyed to reagent mixing tank 4, and a combination of emulsified kerosene or light diesel oil and anionic / cationic metal mineral collectors is added, along with a frother. The mixture is then subjected to enhanced stirring and hydrophobic treatment. After stirring for 15 to 20 minutes, the mixture is conveyed to flotation system 5 for roughing, scavenging, and cleaning to obtain gold, silver, and copper-loaded activated carbon and tailings.

[0022] After being filtered by filter #1 (6), the gold, silver, and copper-loaded activated carbon is transported to a new type of ashing and roasting furnace (7) for ashing and roasting to obtain high-grade gold, silver, and copper ash.

[0023] High-grade gold, silver, and copper ash is transferred into reduction smelting furnace 8, and slag-forming agent is added for one or two smelting processes to obtain gold, silver, and copper alloy and smelting slag.

[0024] After quenching the gold-silver-copper alloy, the gold is transferred to a copper-silver leaching tank 9, where nitric acid is added for gold leaching. After complete leaching, the mixture is filtered and washed using filter #2 (10) to obtain gold mud and copper-silver mother liquor. The copper-silver mother liquor is then transferred to a silver chloride precipitation stirring tank 11, where hydrochloric acid is added for silver precipitation. After complete precipitation, the mixture is filtered and washed using filter #3 (12) to obtain silver chloride precipitate and copper-containing mother liquor. The copper-containing mother liquor is then transferred to a copper displacement stirring tank 13, where iron powder is added for displacement. After complete displacement, the mixture is filtered using filter #4 (14) to obtain sponge copper and waste liquid. The silver chloride precipitate is transferred from the slag outlet of filter #3 (12) to a silver displacement stirring tank 15, where dilute hydrochloric acid is added to adjust the slurry, and iron powder is added for displacement. After complete displacement, the mixture is filtered using filter #5 (16) to obtain sponge silver and waste liquid. The sponge silver and gold mud are then used for ingot casting.

[0025] The system first removes a large amount of waste rock through a closed-circuit grinding and classification system and a flotation system to obtain high-quality gold, silver and copper-loaded activated carbon with stable properties, which can significantly reduce the amount of subsequent processing and shorten the roasting time. Then, the roasting conditions are precisely controlled through a new type of ashing roasting furnace to fully release valuable metals such as gold, silver and copper from the activated carbon. Subsequently, one or two precise smelting processes are carried out in a reduction smelting furnace to efficiently reduce valuable metals and reduce impurity content. Finally, multiple sets of selective leaching and replacement equipment are used to complete the leaching and replacement of gold, silver and copper in stages, ultimately obtaining products such as gold mud, sponge silver, and sponge copper.

[0026] Application Example 1

[0027] Sample #1: A type of charred tailings from a complex gold ore extraction process. Its main elemental chemical analysis shows that Au 115.58 g / t, Ag 576.59 g / t, C 38.68%, Cu 3.58%, Fe 8.77%, CaO 6.56%, Al2O3 3.60%, and SiO2 25.35%.

[0028] like Figure 1 As shown, the system described in this utility model is used to recover sample #1. The specific steps are as follows:

[0029] (1) Grinding and classification: The material to be processed is conveyed to the ball mill 1 for crushing and grinding. After crushing and grinding, it is conveyed to the classifying hydrocyclone 3 through the slurry pump 2 to obtain fine particles with a content of -100 mesh of 65% to 85% and a concentration of 20% to 25%. In this process, the grinding concentration is 60% to 70% and the classification concentration is 45% to 50%.

[0030] (2) Flotation separation: Fine particles are conveyed to reagent mixing tank 4, and a preferred combination of emulsified kerosene or light diesel oil and anionic / cationic metal mineral collectors is added, along with a frother. The mixture is then subjected to enhanced stirring and hydrophobic treatment. After stirring for 20 minutes, it is conveyed to flotation system 5 for roughing, scavenging, and cleaning to obtain gold-, silver-, and copper-loaded activated carbon and tailings. During this process, the roughing and scavenging times are 10 minutes. The preferred collectors used in roughing and scavenging are a combination of emulsified kerosene or light diesel oil and anionic / cationic metal mineral collectors. The roughing collector dosage is 400 g / t, and the frother dosage is 30 g / t; the scavenging collector dosage is 300 g / t, and the frother dosage is 20 g / t; the cleaning agent dosage is 100 g / t.

[0031] (3) Ashing and roasting of gold, silver and copper-containing activated carbon: After the gold, silver and copper-containing activated carbon is filtered by filter machine 6, it is transported to the new type of ash roasting furnace 7 for ash roasting. Air or oxygen is introduced during the roasting process, and the roasting temperature is controlled at 620~800℃. The roasting time is 48 hours to obtain high-grade gold, silver and copper ash.

[0032] (4) Reduction smelting of roasted ash: High-grade gold, silver and copper ash is transferred to reduction smelting furnace 8, and smelting is carried out twice with the addition of slag-forming agents quartz, sodium carbonate and borax to obtain gold, silver and copper alloy and smelting slag. In this process, the slag-forming agents are formulated according to the total material weight ratio of quartz 15%, sodium carbonate 12% and boron 6%, and the silica content of the slag is controlled at 1~1.2; the smelting temperature is controlled at 1200~1400℃.

[0033] (5) Selective leaching and displacement of alloyed gold: After water quenching, the gold alloy containing gold, silver, and copper is transported to the copper-silver leaching tank 9, where nitric acid is added for gold leaching. After complete leaching, it is filtered and washed by filter #2 10 to obtain gold mud and copper-silver mother liquor. The copper-silver mother liquor is then transferred to the silver chloride precipitation stirring tank 11, where hydrochloric acid is added for silver precipitation. After complete precipitation, it is filtered and washed by filter #3 12 to obtain silver chloride precipitate and copper-containing mother liquor. The copper-containing mother liquor is then transferred to the copper displacement stirring tank 13, where iron powder is added for displacement. After complete displacement, it is filtered by filter #4 14 to obtain sponge copper and waste liquid. The silver chloride precipitate is transferred from the filter residue port of filter #3 12 to the silver displacement stirring tank 15, where dilute hydrochloric acid is added to adjust the slurry, and iron powder is added for displacement. After complete displacement, it is filtered by filter #5 16 to obtain sponge silver and waste liquid. The sponge silver and gold mud are then used for ingot casting.

[0034] The experimental results obtained were as follows: gold recovery rate was 96.35%, silver recovery rate was 95.59%, and copper recovery rate was 94.99%.

[0035] Application Example 2

[0036] Sample #2: A type of charcoal from gold extraction tailings of a complex gold ore. Its main elemental chemical analysis shows: Au 23.45 g / t, Ag 164.66 g / t, C 9.68%, Cu 4.87%, Fe 21.65%, CaO 4.43%, Al₂O₃ 4.62%. 、 SiO2 40.35%.

[0037] like Figure 1 As shown, the system described in this utility model is used to recover sample #2. The specific steps are as follows:

[0038] (1) Grinding and classification: The material to be processed is conveyed to the ball mill 1 for crushing and grinding. After crushing and grinding, it is conveyed to the classifying hydrocyclone 3 through the slurry pump 2 to obtain fine particles with a content of -100 mesh of 65% to 85% and a concentration of 20% to 25%. In this process, the grinding concentration is 60% to 70% and the classification concentration is 45% to 50%.

[0039] (2) Flotation separation: The fine particles obtained in step (1) are transported to the reagent mixing tank 4, and a combination of emulsified kerosene or light diesel oil and anionic / cationic metal mineral collectors is added, along with a frother. The mixture is then subjected to enhanced stirring and hydrophobic treatment. After stirring for 15 minutes, the mixture is transported to the flotation system 5 for roughing, scavenging, and cleaning to obtain gold, silver, copper-loaded activated carbon and tailings. In this process, the roughing and scavenging times are 8 minutes. The collectors used in the roughing and scavenging are preferably a combination of emulsified kerosene or light diesel oil and anionic / cationic metal mineral collectors. The roughing collector dosage is 450 g / t, and the frother dosage is 40 g / t; the scavenging collector dosage is 200 g / t, and the frother dosage is 40 g / t; the cleaning sodium hexametaphosphate dosage is 130 g / t.

[0040] (3) Ashing and roasting of gold, silver and copper-containing activated carbon: After being filtered by filter machine 6, the gold, silver and copper-containing activated carbon is transported to the new type of ash roasting furnace 7 for ash roasting. During the roasting process, air or oxygen is introduced and the roasting temperature is controlled at 620~800℃. The roasting time is 30 hours to obtain high-grade gold, silver and copper ash.

[0041] (4) Reduction smelting of roasted ash: High-grade gold, silver and copper ash is transferred to reduction smelting furnace 8, and smelting is carried out twice with the addition of slag-forming agents quartz, sodium carbonate and borax to obtain gold, silver and copper alloy and smelting slag. In this process, the slag-forming agent is formulated according to the total material weight ratio of quartz 17%, sodium carbonate 10% and borax 5%, and the silica content of the slag is controlled at 1~1.2; the smelting temperature is controlled at 1200~1400℃.

[0042] (5) Selective leaching and displacement of alloyed gold: After water quenching, the gold alloy containing gold, silver, and copper is transported to the copper-silver leaching tank 9, where nitric acid is added for gold leaching. After complete leaching, it is filtered and washed by filter #2 10 to obtain gold mud and copper-silver mother liquor. The copper-silver mother liquor is then transferred to the silver chloride precipitation stirring tank 11, where hydrochloric acid is added for silver precipitation. After complete precipitation, it is filtered and washed by filter #3 12 to obtain silver chloride precipitate and copper-containing mother liquor. The copper-containing mother liquor is then transferred to the copper displacement stirring tank 13, where iron powder is added for displacement. After complete displacement, it is filtered by filter #4 14 to obtain sponge copper and waste liquid. The silver chloride precipitate is transferred from the filter residue port of filter #3 12 to the silver displacement stirring tank 15, where dilute hydrochloric acid is added to adjust the slurry, and iron powder is added for displacement. After complete displacement, it is filtered by filter #5 16 to obtain sponge silver and waste liquid. The sponge silver and gold mud are then used for ingot casting.

[0043] The experimental results obtained were as follows: gold recovery rate was 97.43%, silver recovery rate was 95.78%, and copper recovery rate was 96.33%.

[0044] Application Example 3

[0045] Sample #3: A type of charred tailings from a complex gold ore extraction process. Its main elemental chemical analysis shows that it contains 76.35 g / t of Au, 300.72 g / t of Ag, 29.67% of C, 4.39% of Cu, 17.82% of Fe, 7.75% of CaO, 35.45% of Al2O3, and 26.41% of SiO2.

[0046] like Figure 1 As shown, the system described in this utility model is used to recover sample #3. The specific steps are as follows:

[0047] (1) Grinding and classification: The material to be processed is conveyed to the ball mill 1 for crushing and grinding. After crushing and grinding, it is conveyed to the classifying hydrocyclone 3 through the slurry pump 2 to obtain fine particles with a content of -100 mesh of 65% to 85% and a concentration of 20% to 25%. In this process, the grinding concentration is 60% to 70% and the classification concentration is 45% to 50%.

[0048] (2) Flotation separation: The fine particles obtained in step (1) are transported to the reagent mixing tank 4, and a combination of emulsified kerosene or light diesel oil and anionic / cationic metal mineral collectors is added, along with a frother. The mixture is then subjected to enhanced stirring and hydrophobic treatment. After stirring for 15 minutes, the mixture is transported to the flotation system 5 for roughing, scavenging, and cleaning to obtain gold, silver, copper-loaded activated carbon and tailings. In this process, the roughing and scavenging times are 8 minutes. The collectors used in the roughing and scavenging are preferably a combination of emulsified kerosene or light diesel oil and anionic / cationic metal mineral collectors. The roughing collector dosage is 500 g / t, and the frother dosage is 50 g / t; the scavenging collector dosage is 400 g / t, and the frother dosage is 50 g / t; the cleaning sodium hexametaphosphate dosage is 150 g / t.

[0049] (3) Ashing and roasting of gold, silver and copper-containing activated carbon: After being filtered by filter machine 6, the gold, silver and copper-containing activated carbon is transported to the new type of ash roasting furnace 7 for ash roasting. During the roasting process, air or oxygen is introduced and the roasting temperature is controlled at 620~800℃. The roasting time is 24 hours to obtain high-grade gold, silver and copper ash.

[0050] (4) Reduction smelting of roasted ash: High-grade gold, silver and copper ash is transferred to reduction smelting furnace 8, and smelting is carried out twice with the addition of slag-forming agents quartz, sodium carbonate and borax to obtain gold, silver and copper alloy and smelting slag. In this process, the slag-forming agents are formulated according to the total material weight ratio of quartz 14%, sodium carbonate 8% and borax 4%, and the silica content of the slag is controlled at 1~1.2; the smelting temperature is controlled at 1200~1400℃.

[0051] (5) Selective leaching and displacement of alloyed gold: After water quenching, the gold alloy containing gold, silver, and copper is transported to the copper-silver leaching tank 9, where nitric acid is added for gold leaching. After complete leaching, it is filtered and washed by filter #2 10 to obtain gold mud and copper-silver mother liquor. The copper-silver mother liquor is then transferred to the silver chloride precipitation stirring tank 11, where hydrochloric acid is added for silver precipitation. After complete precipitation, it is filtered and washed by filter #3 12 to obtain silver chloride precipitate and copper-containing mother liquor. The copper-containing mother liquor is then transferred to the copper displacement stirring tank 13, where iron powder is added for displacement. After complete displacement, it is filtered by filter #4 14 to obtain sponge copper and waste liquid. The silver chloride precipitate is transferred from the filter residue port of filter #3 12 to the silver displacement stirring tank 15, where dilute hydrochloric acid is added to adjust the slurry, and iron powder is added for displacement. After complete displacement, it is filtered by filter #5 16 to obtain sponge silver and waste liquid. The sponge silver and gold mud are then used for ingot casting.

[0052] The experimental results obtained were as follows: gold recovery rate was 96.12%, silver recovery rate was 95.06%, and copper recovery rate was 96.35%.

[0053] In summary, the system described in this utility model can achieve good results in processing gold extraction tailings and char from complex gold ore with gold recovery rates of over 95%, silver recovery rates of over 95%, and copper recovery rates of over 95%. The system demonstrates excellent comprehensive resource recovery, good process stability and controllability, is environmentally friendly, and has suitable production costs. This system effectively utilizes resources and provides guidance for the comprehensive utilization of resources in the processing of gold extraction tailings and char from complex gold ore.

[0054] The present invention has been described in detail above through specific and preferred embodiments. However, those skilled in the art should understand that the present invention is not limited to the embodiments described above. Any modifications or equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for efficient recovery of gold, silver, and copper from crushed coke in complex gold ore tailings, characterized in that: The system includes a ball mill (1), the outlet of which is connected in sequence to a slurry pump (2) and a classifying hydrocyclone (3), the sand outlet of which is connected to the inlet of the ball mill (1), the overflow outlet of which is connected in sequence to a reagent stirring tank (4), a flotation system (5) and a No. 1 filter (6), the slag outlet of which is connected in sequence to a new type of ashing roasting furnace (7), a reduction smelting furnace (8), a copper-silver leaching stirring tank (9) and a No. 2 filter (10), the filtrate outlet of which is connected in sequence to a silver chloride precipitation stirring tank (12) and a No. 3 filter (13), the filtrate outlet of which is connected in sequence to a copper displacement stirring tank (13) and a No. 4 filter (14), and the slag outlet of which is connected in sequence to a silver displacement stirring tank (15) and a No. 5 filter (16).

2. The system for efficient recovery of gold, silver, and copper from crushed coke in complex gold ore tailings as described in claim 1, characterized in that: The flotation system (5) includes a rougher flotation machine (51), a scavenger flotation machine (52), and a cleaner flotation machine (53). The outlet of the reagent mixing tank (4) is connected to the inlet of the rougher flotation machine (51), and the concentrate outlet of the cleaner flotation machine (53) is connected to the inlet of the No. 1 filter (6).

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