Method for recovering valuable metals from copper electrolysis sludge and acid leaching sludge

Abstract

The application discloses a method for recovering valuable metals from copper electrolytic sludge and acid leaching sludge, and is characterized in that: the method is used for mixing and blending the electrolytic sludge and the acid leaching sludge according to the changeable properties of the electrolytic sludge and the acid leaching sludge, so as to ensure the stability of the ore dressing feed, and meanwhile, the acid and alkali materials are partially neutralized in advance, and the content of sulfur after the ore blending is relatively appropriate and is favorable to the recovery of gold. Then, the grinding and rapid flotation are carried out, a part of qualified concentrate is recovered as early as possible, and meanwhile, a part of fine sludge enters the concentrate, so as to prevent a large amount of sludge from affecting subsequent flotation. Subsequently, the multi-stage dosing short-time roughing and scavenging are carried out, so as to improve the recovery rate as much as possible, the multi-stage dosing long-time cleaning is carried out, so as to improve the cleaning operation efficiency as much as possible, the middlings are separately treated, and the middlings are reasonably returned to the position, so as to further improve the valuable metal recovery rate. The process flow of the application is simple, the applicability is strong, the electrolytic sludge and the acid leaching sludge can be recovered with high quality, the quality of the concentrate can be ensured, the recovery rates of gold, silver and copper are maximized, and the reasonable utilization of secondary resources is realized.

Description

Technical Field

[0001] This invention relates to the field of mineral processing technology, and in particular discloses a method for recovering valuable metals from copper electrolytic mud and acid leaching mud. Background Technology

[0002] During the copper smelting process, electrolytic workshops and sulfuric acid workshops will generate a certain amount of electrolytic mud and acid leaching mud. The mud contains valuable metals such as copper, gold, silver, selenium, and tellurium, which is a valuable secondary resource. Electrolytic mud is generally weakly alkaline and contains high levels of gold, silver, copper, and sulfur, making it economically valuable and suitable for separate processing. Acid leaching mud is generally weakly acidic and contains lower levels of gold, silver, and copper, especially sulfur, making it economically uneconomical to process separately. Since both electrolytic mud and acid leaching mud are prone to mudification and have large grade fluctuations, conventional flotation has the following problems: (1) Valuable metals float very slowly, requiring a long flotation time to improve metal recovery, but the action time of mineral processing reagents is limited, so extending the flotation time does not improve the recovery rate; (2) Electrolytic mud and acid leaching mud are severely mudded, and a large amount of mud enters the roughing froth, affecting the quality of the concentrate; (3) During the refining process of the rough concentrate, a large amount of mud and valuable metals enter the middlings, resulting in a large middlings circulation volume, low refining efficiency, and low metal recovery rate. Therefore, it has always been stored in the slag dump as a waste slag heap. Summary of the Invention

[0003] This invention proposes a method for recovering valuable metals from copper electrolytic mud and acid leaching mud, which has a simple process flow, strong applicability, and can ensure high-quality recovery of electrolytic mud and acid leaching mud.

[0004] To achieve the above objectives, the present invention provides a method for recovering valuable metals from copper electrolytic mud and acid leaching mud, characterized by comprising the following steps:

[0005] (1) Mixing and blending of ore

[0006] To ensure the uniformity of electrolytic mud and acid leaching mud, the electrolytic mud and acid leaching mud are first mixed separately, and a composite sample is made from the mixed electrolytic mud and sulfuric acid mud.

[0007] (2) Grinding

[0008] The composite sample described in step (1) is used as the raw ore for grinding to obtain a slurry with a grinding concentration of 50-60% and a grinding fineness of less than 0.074 mm of 95-98%.

[0009] (3) Rapid flotation

[0010] Adjust the pulp concentration in step (2) to 35-50%. Based on the dry weight of the raw ore, first add 300-400 g / t of activator copper sulfate, 2000-4000 g / t of sodium sulfide, 250-350 g / t of collector butyl xanthate, and 150-200 g / t of frother ester 115. The flotation time is 2-3 min to obtain concentrate I and fast flotation tailings. Concentrate I contains 10.78-12.56 g / t of gold with a gold recovery rate of 37.85-42.45%, 1223.65-1598.57 g / t of silver with a silver recovery rate of 35.59%-39.73%, and 6.12-7.54% of copper with a copper recovery rate of 18.43-19.32%.

[0011] (4) Coarse selection

[0012] In step (3), the following are added to the rapid flotation tailings: 800-1000 g / t of slime remover CMH, 100-200 g / t of activator copper sulfate, 500-1000 g / t of sodium sulfide, 250-350 g / t of collector butyl xanthate, and 40-60 g / t of frother ester 115. The flotation time is 3-5 minutes. Then, 500-800 g / t of slime remover CMH, 50-100 g / t of activator copper sulfate, 300-500 g / t of sodium sulfide, 100-150 g / t of collector butyl xanthate, and 20-30 g / t of frother ester 115. The flotation time is 2-4 minutes. Finally, 500-600 g / t of slime remover CMH, 80-100 g / t of collector butyl xanthate, and 115 of frother ester 115 are added. 10-15 g / t, flotation time 2-3 min, to obtain rough concentrate I and rougher tailings;

[0013] (5) Scan 1

[0014] In step (4), add 400-600 g / t of slime remover CMH, 200-300 g / t of activator sodium sulfide, 80-120 g / t of collector butyl xanthate, and 20-30 g / t of frother ester 115 to the roughing tailings. The flotation time is 2-3 min. Then add 300-500 g / t of slime remover CMH, 100-150 g / t of activator sodium sulfide, 60-100 g / t of collector butyl xanthate, and 10-20 g / t of frother ester 115. The flotation time is 2-3 min to obtain middlings III and scavenging tailings I.

[0015] (6) Scan 2

[0016] In step (5), 60-100 g / t of collector butyl xanthate and 10-20 g / t of frother ester 115 are added to the scavenged tailings I. The flotation time is 2-3 min to obtain middlings IV and scavenged tailings II.

[0017] (7) Scan 3

[0018] In step (6), 50-80 g / t of collector butyl xanthate and 1155-10 g / t of frother ester are added to the scavenging tailings II. The flotation time is 2-3 min to obtain middlings VII and tailings.

[0019] (8) Selected 1

[0020] The rough concentrate I is further refined by adding 60-100 g / t of collector butyl xanthate and 10-20 g / t of frother ester 115, and the flotation time is 5-7 min. Then, 60-100 g / t of butyl xanthate and 10-20 g / t of frother ester 115 are added again, and the flotation time is 5-6 min to obtain refined concentrate I and middlings II.

[0021] (9) Separate processing of medium-sized ore

[0022] Middle ore II, Middle ore III, and Middle ore IV are combined, and 300-500 g / t of slime remover CMH, 100-150 g / t of collector butyl xanthate, and 10-20 g / t of frother ester 115 are added. The flotation time is 5-8 min. Then, 10-20 g / t of frother ester 115 is added, and the flotation time is 5-6 min to obtain Middle ore V and Middle ore VI.

[0023] (10) Selected 2

[0024] The selected concentrate I and middlings V were combined for a second cleaning process. Butyl xanthate collector 100–150 g / t and frother ester 115 10–20 g / t were added, and the flotation time was 5–7 min. Then, frother ester 115 10–20 g / t was added, and the flotation time was 5–6 min, yielding concentrate II and middlings I. Concentrate II contained 9.78–11.34 g / t of gold with a gold recovery rate of 33.34–39.71%, 1198.75–1457.54 g / t of silver with a silver recovery rate of 36.78%–40.21%, and 5.89–6.67% of copper with a copper recovery rate of 16.78%–18.15%.

[0025] (11) Return of Zhongkuang

[0026] The intermediate minerals I return to the fine cleaning operation 1; the intermediate minerals VI return to the roughing and rapid flotation operation; and the intermediate minerals VII return to the scavenging operation 1.

[0027] (12) Ore blending and smelting

[0028] The concentrate I obtained in step (3) and the concentrate II obtained in step (10) are combined as gold concentrate. The gold concentrate is blended with copper smelting raw materials and then enters the copper smelting system.

[0029] A further preferred technical solution of the present invention, which describes a method for recovering valuable metals from copper electrolytic mud and acid leaching mud, is characterized by:

[0030] 1. In step (3), the pulp concentration in step (2) is adjusted to 42%, and the following are added: 350 g / t copper sulfate activator, 3000 g / t sodium sulfide, 300 g / t butyl xanthate collector, 170 g / t frother ester 115, and the flotation time is 2.5 min.

[0031] 2. In step (4), add 900g / t of slime remover CMH, 150g / t of activator copper sulfate, 750g / t of sodium sulfide, 300g / t of collector butyl xanthate, and 50g / t of frother ester 115. The flotation time is 4min. Then add 650g / t of slime remover CMH, 75g / t of activator copper sulfate, 400g / t of sodium sulfide, 125g / t of collector butyl xanthate, and 25g / t of frother ester 115. The flotation time is 3min. Then add 550g / t of slime remover CMH, 90g / t of collector butyl xanthate, and 13g / t of frother ester 115. The flotation time is 2.5min.

[0032] 3. In step (5), add 500g / t of slime remover CMH, 250g / t of activator sodium sulfide, 100g / t of collector butyl xanthate, and 25g / t of frother ester 115. The flotation time is 2.5min. Then add 400g / t of slime remover CMH, 125g / t of activator sodium sulfide, 80g / t of collector butyl xanthate, and 15g / t of frother ester 115. The flotation time is 2.5min.

[0033] 4. In step (6), 80 g / t of butyl xanthate collector and 15 g / t of frother ester 115 are added, and the flotation time is 2.5 min;

[0034] 5. In step (7), 65 g / t of butyl xanthate collector and 115 g / t of frother ester are added, and the flotation time is 2.5 min;

[0035] 6. In step (8), 80 g / t of butyl xanthate collector and 115 g / t of frother ester are added, the flotation time is 6 min, and then 80 g / t of butyl xanthate and 115 g / t of frother ester are added, the flotation time is 5.5 min.

[0036] 7. In step (9), add 400g / t of slime remover CMH, 125g / t of collector butyl xanthate, and 11515g / t of frother ester, and the flotation time is 6.5min. Add 11515g / t of frother ester and the flotation time is 5.5min.

[0037] 8. In step (10), 125 g / t of butyl xanthate collector and 115 g / t of frother ester are added, and the flotation time is 6 min. In step (10), 115 g / t of frother ester is added, and the flotation time is 5.5 min.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] 1. This invention mixes and blends electrolytic mud and acid leaching mud to ensure the stability of the beneficiation feed. At the same time, the acid and alkali materials are partially neutralized in advance, and the sulfur content after blending is more suitable, which is more conducive to gold recovery.

[0040] 2. The main method of this invention is grinding-flotation. Flotation includes rapid flotation, roughing, cleaning, and scavenging. The purpose of rapid flotation is twofold: firstly, to pre-select a portion of qualified concentrate; and secondly, to remove a portion of the slime without adding slime removers, preventing a large amount of slime from affecting subsequent flotation. Roughing, cleaning, and scavenging differ from conventional methods. They employ staged reagent addition and staged flotation, with roughing and scavenging using multi-stage, short-time flotation, and cleaning using multi-stage, long-time flotation. The reason for using staged reagent addition and short-time flotation in roughing and scavenging is that valuable metals float very slowly. If single-stage reagent addition flotation is used, on the one hand, a large amount of slime will float to the surface, and on the other hand, the flotation time will be too long, causing the mineral processing reagents to become ineffective. Staged reagent addition and short-time flotation can ensure flotation recovery while avoiding the large-scale floating of slime. Cleaning uses staged reagent addition and long-time flotation mainly to ensure the efficiency of cleaning operations and improve the recovery rate.

[0041] 3. The tailings from the first fine-selection process are combined with those from the first and second fine-selection processes for further fine-selection. The concentrate from the second fine-selection process is then combined with the froth from the first fine-selection process for further fine-selection. The tailings from the second fine-selection process are then returned to the rapid flotation operation. This approach can improve the metal recovery rate and effectively avoid the vicious cycle of ore slime.

[0042] 4. CMH has a strong adsorption capacity for mineral slime. Through adsorption, it changes the potential of the surface of the slime, weakens the force of the slime on the surface of useful minerals, enhances the hydration of the slime, and increases its hydrophilicity, thus achieving the purpose of partially eliminating the slime.

[0043] 5. The method provided by this invention has a simple process flow and strong applicability. It can ensure high-quality recovery of electrolytic mud and acid leaching mud, and maximize the recovery rate of gold, silver and copper while ensuring the quality of concentrate. It realizes the rational utilization of secondary resources and has good application prospects. Detailed Implementation

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1: A method for recovering valuable metals from copper electrolytic mud and acid leaching mud, comprising the following steps:

[0046] (1) Mixing and blending of ore

[0047] To ensure the uniformity of electrolytic mud and acid leaching mud, the electrolytic mud and acid leaching mud are first mixed separately, and a composite sample is made from the mixed electrolytic mud and sulfuric acid mud.

[0048] (2) Grinding

[0049] The composite sample described in step (1) is used as the raw ore for grinding to obtain a slurry with a grinding concentration of 50-60% and a grinding fineness of less than 0.074 mm of 95-98%.

[0050] (3) Rapid flotation

[0051] Adjust the pulp concentration in step (2) to 35-50%. Based on the dry weight of the raw ore, first add 300-400 g / t of activator copper sulfate, 2000-4000 g / t of sodium sulfide, 250-350 g / t of collector butyl xanthate, and 150-200 g / t of frother ester 115. The flotation time is 2-3 min to obtain concentrate I and fast flotation tailings. Concentrate I contains 10.78-12.56 g / t of gold with a gold recovery rate of 37.85-42.45%, 1223.65-1598.57 g / t of silver with a silver recovery rate of 35.59%-39.73%, and 6.12-7.54% of copper with a copper recovery rate of 18.43-19.32%.

[0052] (4) Coarse selection

[0053] In step (3), the following are added to the rapid flotation tailings: 800-1000 g / t of slime remover CMH, 100-200 g / t of activator copper sulfate, 500-1000 g / t of sodium sulfide, 250-350 g / t of collector butyl xanthate, and 40-60 g / t of frother ester 115. The flotation time is 3-5 minutes. Then, 500-800 g / t of slime remover CMH, 50-100 g / t of activator copper sulfate, 300-500 g / t of sodium sulfide, 100-150 g / t of collector butyl xanthate, and 20-30 g / t of frother ester 115. The flotation time is 2-4 minutes. Finally, 500-600 g / t of slime remover CMH, 80-100 g / t of collector butyl xanthate, and 115 of frother ester 115 are added. 10-15 g / t, flotation time 2-3 min, to obtain rough concentrate I and rougher tailings;

[0054] (5) Scan 1

[0055] In step (4), add 400-600 g / t of slime remover CMH, 200-300 g / t of activator sodium sulfide, 80-120 g / t of collector butyl xanthate, and 20-30 g / t of frother ester 115 to the roughing tailings. The flotation time is 2-3 min. Then add 300-500 g / t of slime remover CMH, 100-150 g / t of activator sodium sulfide, 60-100 g / t of collector butyl xanthate, and 10-20 g / t of frother ester 115. The flotation time is 2-3 min to obtain middlings III and scavenging tailings I.

[0056] (6) Scan 2

[0057] In step (5), 60-100 g / t of collector butyl xanthate and 10-20 g / t of frother ester 115 are added to the scavenged tailings I. The flotation time is 2-3 min to obtain middlings IV and scavenged tailings II.

[0058] (7) Scan 3

[0059] In step (6), 50-80 g / t of collector butyl xanthate and 1155-10 g / t of frother ester are added to the scavenging tailings II. The flotation time is 2-3 min to obtain middlings VII and tailings.

[0060] (8) Selected 1

[0061] The rough concentrate I is further refined by adding 60-100 g / t of collector butyl xanthate and 10-20 g / t of frother ester 115, and the flotation time is 5-7 min. Then, 60-100 g / t of butyl xanthate and 10-20 g / t of frother ester 115 are added again, and the flotation time is 5-6 min to obtain refined concentrate I and middlings II.

[0062] (9) Separate processing of medium-sized ore

[0063] Middle ore II, Middle ore III, and Middle ore IV are combined, and 300-500 g / t of slime remover CMH, 100-150 g / t of collector butyl xanthate, and 10-20 g / t of frother ester 115 are added. The flotation time is 5-8 min. Then, 10-20 g / t of frother ester 115 is added, and the flotation time is 5-6 min to obtain Middle ore V and Middle ore VI.

[0064] (10) Selected 2

[0065] The selected concentrate I and middlings V were combined for a second cleaning process. Butyl xanthate collector 100–150 g / t and frother ester 115 10–20 g / t were added, and the flotation time was 5–7 min. Then, frother ester 115 10–20 g / t was added, and the flotation time was 5–6 min, yielding concentrate II and middlings I. Concentrate II contained 9.78–11.34 g / t of gold with a gold recovery rate of 33.34–39.71%, 1198.75–1457.54 g / t of silver with a silver recovery rate of 36.78%–40.21%, and 5.89–6.67% of copper with a copper recovery rate of 16.78%–18.15%.

[0066] (11) Return of Zhongkuang

[0067] The intermediate minerals I return to the fine cleaning operation 1; the intermediate minerals VI return to the roughing and rapid flotation operation; and the intermediate minerals VII return to the scavenging operation 1.

[0068] (12) Ore blending and smelting

[0069] The concentrate I obtained in step (3) and the concentrate II obtained in step (10) are combined as gold concentrate. The gold concentrate is blended with copper smelting raw materials and then enters the copper smelting system.

[0070] This invention first mixes and blends electrolytic mud and acid leaching mud, then uses a rapid flotation method to obtain concentrate 1. Finally, it uses segmented reagent addition for short-time multi-stage roughing, scavenging and segmented reagent addition for long-time multi-stage cleaning to obtain concentrate 2. Concentrate 1 + concentrate 2 is used as the final gold concentrate. The gold concentrate is blended with copper smelting raw materials until the gold meets the pricing standard. After blending, it enters the smelting system.

[0071] The electrolytic mud contains 2.0-6.0 g / t of gold, 150-300 g / t of silver, 1.63-4.54% of copper, and 1.58-2.33% of sulfur; the acid leaching mud contains 0.45-0.60 g / t of gold, 32.5-50 g / t of silver, 0.32-0.61% of copper, and 0.34-0.67% of sulfur. The mud remover CMH is a novel synthetic agent containing the following raw material components in parts by weight: 8-15 parts modified polycarboxylic acid, 1-2 parts potassium hexametaphosphate, 3-4 parts carboxymethyl cellulose, 3-6 parts styrene-acrylic emulsion (content 50%), 1-2 parts ethylene glycol, and 4-10 parts water.

[0072] In steps (4) and (5), multi-stage reagent addition and multi-stage separation are adopted, with each stage flotation time not exceeding 5 minutes, which is beneficial to ensuring concentrate quality. In steps (8), (9), and (10), multi-stage reagent addition and multi-stage separation are adopted, with each stage flotation time exceeding 5 minutes, which is beneficial to improving the cleaning efficiency. In step (11), middlings I is returned to cleaning operation 1, middlings VI is returned to roughing rapid flotation operation, and middlings VII is returned to scavenging operation 1.

[0073] Example 2, in the method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to Example 1, in step (3), the slurry concentration in step (2) is adjusted to 42%, and the following are added: 350g / t copper sulfate activator, 3000g / t sodium sulfide, 300g / t butyl xanthate collector, 170g / t frother ester 115, and the flotation time is 2.5min.

[0074] Example 3: In a method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to Example 1 or 2, in step (4), 900 g / t of slime remover CMH, 150 g / t of activator copper sulfate, 750 g / t of sodium sulfide, 300 g / t of collector butyl xanthate, and 50 g / t of frother ester 115 are added, and the flotation time is 4 min. Then, 650 g / t of slime remover CMH, 75 g / t of activator copper sulfate, 400 g / t of sodium sulfide, 125 g / t of collector butyl xanthate, and 25 g / t of frother ester 115 are added, and the flotation time is 3 min. Then, 550 g / t of slime remover CMH, 90 g / t of collector butyl xanthate, and 13 g / t of frother ester 115 are added, and the flotation time is 2.5 min.

[0075] Example 4, in a method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to any one of Examples 1-3, in step (5), 500 g / t of slime remover CMH, 250 g / t of activator sodium sulfide, 100 g / t of collector butyl xanthate, and 25 g / t of frother ester 115 are added, and the flotation time is 2.5 min. Then, 400 g / t of slime remover CMH, 125 g / t of activator sodium sulfide, 80 g / t of collector butyl xanthate, and 15 g / t of frother ester 115 are added, and the flotation time is 2.5 min.

[0076] Example 5, in a method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to any one of Examples 1-4, step (6) involves adding 80 g / t of collector butyl xanthate and 15 g / t of frother ester 115, with a flotation time of 2.5 min.

[0077] Example 6, in a method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to any one of Examples 1-5, 65 g / t of collector butyl xanthate and 115 8 g / t of frother ester are added in step (7), and the flotation time is 2.5 min.

[0078] Example 7, in a method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to any one of Examples 1-6, in step (8), 80 g / t of collector butyl xanthate and 115 g / t of frother ester are added, the flotation time is 6 min, and then 80 g / t of butyl xanthate and 115 g / t of frother ester are added, the flotation time is 5.5 min.

[0079] Example 8, in a method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to any one of Examples 1-7, in step (9), 400 g / t of mud remover CMH, 125 g / t of collector butyl xanthate, and 115 g / t of frother ester are added, and the flotation time is 6.5 min. In step (9), 115 g / t of frother ester is added, and the flotation time is 5.5 min.

[0080] Example 9, in a method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to any one of Examples 1-8, in step (10), 125 g / t of collector butyl xanthate and 115 g / t of frother ester are added, and the flotation time is 6 min; in step (2), 115 g / t of frother ester is added, and the flotation time is 5.5 min.

[0081] Example 10: A certain amount of electrolytic mud and acid leaching mud were stored in the slag yard of a copper smelter. The electrolytic mud contained 3.55 g / t of gold, 245.87 g / t of silver, 3.36% of copper, and 1.77% of sulfur. The acid leaching mud contained 0.53 g / t of gold, 45.8 g / t of silver, 0.51% of copper, and 0.48% of sulfur.

[0082] (1) Mixing and blending of ore

[0083] To ensure the uniformity of the electrolytic mud and acid leaching mud, they were first mixed separately. The mixed electrolytic mud and sulfuric acid mud were then formulated into a composite sample according to a certain ratio.

[0084] (2) Grinding

[0085] The prepared composite sample was used as the raw ore for grinding to obtain a slurry with a grinding concentration of 58.92% and a grinding fineness of less than 0.074 mm of 97.34%.

[0086] (3) Rapid flotation

[0087] The pulp concentration was adjusted to 40.34%. Based on the dry weight of the raw ore, 350 g / t of copper sulfate activator, 3000 g / t of sodium sulfide, 300 g / t of butyl xanthate collector, and 180 g / t of frother ester 115 were added. The flotation time was 2.5 min to obtain concentrate 1 and fast flotation tailings. Concentrate 1 contained 11.87 g / t of gold with a gold recovery rate of 38.45%, 1348.68 g / t of silver with a silver recovery rate of 38.76%, and 6.88% of copper with a copper recovery rate of 18.93%.

[0088] (4) Coarse selection

[0089] Add 900 g / t of slime remover CMH, 180 g / t of activator copper sulfate, 800 g / t of sodium sulfide, 280 g / t of collector butyl xanthate, and 11550 g / t of frother ester to the tailings of rapid flotation. The flotation time is 4 min. Then add 700 g / t of slime remover CMH, 80 g / t of activator copper sulfate, 400 g / t of sodium sulfide, 120 g / t of collector butyl xanthate, and 11525 g / t of frother ester. The flotation time is 3 min. Then add 550 g / t of slime remover CMH, 90 g / t of collector butyl xanthate, and 11512 g / t of frother ester. The flotation time is 2.5 min to obtain rough concentrate 1 and rougher tailings.

[0090] (5) Scan 1

[0091] Add 500g / t of slime remover CMH, 250g / t of activator sodium sulfide, 100g / t of collector butyl xanthate, and 25g / t of frother ester 115 to the tailings from rougher 1. The flotation time is 2.5min. Then add 400g / t of slime remover CMH, 120g / t of activator sodium sulfide, 80g / t of collector butyl xanthate, and 15g / t of frother ester 115. The flotation time is 2.5min to obtain middlings 3 and tailings from scavenger 1.

[0092] (6) Scan 2

[0093] Add 80 g / t of collector butyl xanthate and 15 g / t of frother ester 115 to the tailings of scavenging 1, and the flotation time is 2.5 min to obtain middlings 4 and tailings of scavenging 2.

[0094] (7) Scan 3

[0095] Add 60 g / t of collector butyl xanthate and 8 g / t of frother ester to the tailings of scavenging 2, and the flotation time is 2.5 min to obtain middlings 7 and tailings.

[0096] (8) Selected 1

[0097] The rough concentrate 1 is further refined by adding 80 g / t of collector butyl xanthate and 15 g / t of frother ester 115, and the flotation time is 6 min. Then, 80 g / t of butyl xanthate and 18 g / t of frother ester 115 are added, and the flotation time is 5.5 min to obtain refined concentrate 1 and middlings 2.

[0098] (9) Separate processing of medium-sized ore

[0099] Middle ore 2, middle ore 3, and middle ore 4 were combined, and 400 g / t of slime remover CMH, 120 g / t of collector butyl xanthate, and 15 g / t of frother ester 115 were added. The flotation time was 7 min. Then, 16 g / t of frother ester 115 was added, and the flotation time was 5.5 min to obtain middle ore 5 and middle ore 6.

[0100] (10) Selected 2

[0101] The concentrate from Selected Ore 1 and middlings from Middlings 5 ​​were combined for a second cleaning process. 120 g / t of butyl xanthate collector and 15 g / t of frother ester 115 were added, and the flotation time was 6 min. Then, 16 g / t of frother ester 115 was added, and the flotation time was 5.5 min, yielding Concentrate 2 and Middlings 1. Concentrate 2 contained 10.55 g / t of gold (gold recovery rate of 39.40%), 1297.38 g / t of silver (silver recovery rate of 37.86%), and 6.23% of copper (copper recovery rate of 17.98%).

[0102] (11) Return of Zhongkuang

[0103] The intermediate minerals 1 return to the fine minerals 1 operation, the intermediate minerals 6 return to the roughing and rapid flotation operation, and the intermediate minerals 7 return to the scavenging operation 1.

[0104] (12) Ore blending and smelting

[0105] The concentrate 1 obtained in step (3) and the concentrate 2 obtained in step (10) are combined to form a gold concentrate. The final gold concentrate contains 11.21 g / t of gold and 6.56% of copper. It can be blended with copper smelting raw materials and then enters the copper smelting system.

[0106] Example 11: A copper smelter cleaned up 10,000 tons of electrolytic mud and 11,000 tons of acid leaching mud from its electrolysis workshop and sulfuric acid workshop, respectively. The electrolytic mud contained 2.0 g / t of gold, 150 g / t of silver, and 1.63% of copper, while the acid leaching mud contained 0.60 g / t of gold, 50 g / t of silver, and 0.61% of copper.

[0107] (1) Mixing and blending of ore

[0108] To ensure the uniformity of the electrolytic mud and acid leaching mud, they were first mixed separately. The mixed electrolytic mud and sulfuric acid mud were then formulated into a composite sample according to a certain ratio.

[0109] (2) Grinding

[0110] The prepared composite sample was used as the raw ore for grinding to obtain a slurry with a grinding concentration of 50% and a grinding fineness of less than 0.074 mm of 95%.

[0111] (3) Rapid flotation

[0112] The pulp concentration was adjusted to 35%. Based on the dry weight of the raw ore, 300 g / t of copper sulfate activator, 2000 g / t of sodium sulfide, 250 g / t of butyl xanthate collector, and 150 g / t of frother ester 115 were added. The flotation time was 2 min to obtain concentrate 1 and fast flotation tailings. Concentrate 1 contained 10.78 g / t of gold with a gold recovery rate of 42.45%, 1223.65 g / t of silver with a silver recovery rate of 35.59%, and 6.12 g / t of copper with a copper recovery rate of 18.43%.

[0113] (4) Coarse selection

[0114] Add 800 g / t of slime remover CMH, 100 g / t of activator copper sulfate, 500 g / t of sodium sulfide, 250 g / t of collector butyl xanthate, and 40 g / t of frother ester 115 to the tailings of rapid flotation. The flotation time is 3 min. Then add 500 g / t of slime remover CMH, 50 g / t of activator copper sulfate, 300 g / t of sodium sulfide, 100 g / t of collector butyl xanthate, and 20 g / t of frother ester 115. The flotation time is 2 min. Then add 500 g / t of slime remover CMH, 80 g / t of collector butyl xanthate, and 10 g / t of frother ester 115. The flotation time is 2 min. Rough concentrate 1 and rougher tailings are obtained.

[0115] (5) Scan 1

[0116] Add 400g / t of slime remover CMH, 200g / t of activator sodium sulfide, 80g / t of collector butyl xanthate, and 20g / t of frother ester 115 to the tailings of rougher 1. The flotation time is 2min. Then add 300g / t of slime remover CMH, 100g / t of activator sodium sulfide, 60g / t of collector butyl xanthate, and 10g / t of frother ester 115. The flotation time is 2min to obtain middlings 3 and tailings of scavenger 1.

[0117] (6) Scan 2

[0118] Add 60 g / t of collector butyl xanthate and 10 g / t of frother ester 115 to the tailings of scavenging 1, and the flotation time is 2 min to obtain middlings 4 and tailings of scavenging 2.

[0119] (7) Scan 3

[0120] Add 50 g / t of collector butyl xanthate and 5 g / t of frother ester 115 to the tailings of scavenging 2, and the flotation time is 2 min to obtain middlings 7 and tailings.

[0121] (8) Selected 1

[0122] The rough concentrate 1 is further refined by adding 60 g / t of collector butyl xanthate and 10 g / t of frother ester 115, and the flotation time is 5 min. Then, 60 g / t of butyl xanthate and 10 g / t of frother ester 115 are added again, and the flotation time is 5 min to obtain refined concentrate 1 and middlings 2.

[0123] (9) Separate processing of medium-sized ore

[0124] Middle ore 2, middle ore 3, and middle ore 4 were combined, and 300 g / t of slime remover CMH, 100 g / t of collector butyl xanthate, and 10 g / t of frother ester 115 were added. The flotation time was 5 min. Then, 10 g / t of frother ester 115 was added and the flotation time was 5 min to obtain middle ore 5 and middle ore 6.

[0125] (10) Selected 2

[0126] The concentrate from Selected Ore 1 and middlings from Middlings 5 ​​were combined for a second cleaning process. 100 g / t of butyl xanthate collector and 10 g / t of frother ester 115 were added, and the flotation time was 5 minutes. Then, 10 g / t of frother ester 115 was added again, and the flotation time was 5 minutes, yielding concentrate 2 and middlings 1. Concentrate 2 contained 9.78 g / t of gold (gold recovery rate of 37.01%), 1198.75 g / t of silver (silver recovery rate of 36.78%), and 5.89% of copper (copper recovery rate of 16.78%).

[0127] (11) Return of Zhongkuang

[0128] The intermediate minerals 1 return to the fine minerals 1 operation, the intermediate minerals 6 return to the roughing and rapid flotation operation, and the intermediate minerals 7 return to the scavenging operation 1.

[0129] (12) Ore blending and smelting

[0130] The concentrate 1 obtained in step (3) and the concentrate 2 obtained in step (10) are combined to form a gold concentrate. The final gold concentrate contains 10.46 g / t of gold and 6.77% of copper. It can be blended with copper smelting raw materials and then enters the copper smelting system.

[0131] Example 12: A copper smelter cleaned up 20,000 tons of electrolytic mud and 18,000 tons of acid leaching mud from its electrolysis workshop and sulfuric acid workshop, respectively. The electrolytic mud contained 6.0 g / t of gold, 300 g / t of silver, and 4.54% of copper. The acid leaching mud contained 0.45 g / t of gold, 32.5 g / t of silver, and 0.32% of copper.

[0132] (1) Mixing and blending of ore

[0133] To ensure the uniformity of the electrolytic mud and acid leaching mud, they were first mixed separately. The mixed electrolytic mud and sulfuric acid mud were then formulated into a composite sample according to a certain ratio.

[0134] (2) Grinding

[0135] The prepared composite sample was used as the raw ore for grinding to obtain a slurry with a grinding concentration of 60% and a grinding fineness of less than 0.074 mm of 98%.

[0136] (3) Rapid flotation

[0137] The pulp concentration was adjusted to 50%. Based on the dry weight of the raw ore, 400 g / t of copper sulfate activator, 4000 g / t of sodium sulfide, 350 g / t of butyl xanthate collector, and 200 g / t of frother ester 115 were added. The flotation time was 3 minutes to obtain concentrate 1 and fast flotation tailings. Concentrate 1 contained 12.56 g / t of gold with a gold recovery rate of 37.85%, 1598.57 g / t of silver with a silver recovery rate of 39.73%, and 7.54% of copper with a copper recovery rate of 19.32%.

[0138] (4) Coarse selection

[0139] Add 1000 g / t of slime remover CMH, 200 g / t of activator copper sulfate, 1000 g / t of sodium sulfide, 350 g / t of collector butyl xanthate, and 60 g / t of frother ester 115 to the tailings of rapid flotation. The flotation time is 5 min. Then add 800 g / t of slime remover CMH, 100 g / t of activator copper sulfate, 500 g / t of sodium sulfide, 150 g / t of collector butyl xanthate, and 30 g / t of frother ester 115. The flotation time is 4 min. Then add 600 g / t of slime remover CMH, 100 g / t of collector butyl xanthate, and 15 g / t of frother ester 115. The flotation time is 3 min. Rough concentrate 1 and rougher tailings are obtained.

[0140] (5) Scan 1

[0141] Add 600g / t of slime remover CMH, 300g / t of activator sodium sulfide, 120g / t of collector butyl xanthate, and 30g / t of frother ester 115 to the tailings of rougher 1. The flotation time is 3min. Then add 500g / t of slime remover CMH, 150g / t of activator sodium sulfide, 100g / t of collector butyl xanthate, and 20g / t of frother ester 115. The flotation time is 3min to obtain middlings 3 and tailings of scavenger 1.

[0142] (6) Scan 2

[0143] Add 100g / t of collector butyl xanthate and 20g / t of frother ester 115 to the tailings of scavenging 1, and the flotation time is 3min to obtain middlings 4 and tailings of scavenging 2.

[0144] (7) Scan 3

[0145] Add 80 g / t of collector butyl xanthate and 10 g / t of frother ester 115 to the tailings of scavenging 2, and the flotation time is 3 min to obtain middlings 7 and tailings.

[0146] (8) Selected 1

[0147] The rough concentrate 1 is further refined by adding 100 g / t of collector butyl xanthate and 20 g / t of frother ester 115, and the flotation time is 7 min. Then, 100 g / t of butyl xanthate and 20 g / t of frother ester 115 are added again, and the flotation time is 6 min to obtain refined concentrate 1 and middlings 2.

[0148] (9) Separate processing of medium-sized ore

[0149] Middle ore 2, middle ore 3, and middle ore 4 were combined, and 500 g / t of slime remover CMH, 150 g / t of collector butyl xanthate, and 20 g / t of frother ester 115 were added. The flotation time was 8 min, and then 20 g / t of frother ester 115 was added again. The flotation time was 6 min to obtain middle ore 5 and middle ore 6.

[0150] (10) Selected 2

[0151] The concentrate from Selected Ore 1 and middlings from Middlings 5 ​​were combined for a second cleaning process. 150 g / t of butyl xanthate collector and 20 g / t of frother ester 115 were added, and the flotation time was 7 min. Then, 20 g / t of frother ester 115 was added again, and the flotation time was 6 min, yielding Concentrate 2 and Middlings 1. Concentrate 2 contained 11.34 g / t of gold (gold recovery rate of 33.49%), 1457.54 g / t of silver (silver recovery rate of 40.21%), and 6.67% of copper (copper recovery rate of 18.15%).

[0152] (11) Return of Zhongkuang

[0153] The intermediate minerals 1 return to the fine minerals 1 operation, the intermediate minerals 6 return to the roughing and rapid flotation operation, and the intermediate minerals 7 return to the scavenging operation 1.

[0154] (12) Ore blending and smelting

[0155] The concentrate 1 obtained in step (3) and the concentrate 2 obtained in step (10) are combined to form a gold concentrate, which contains 11.23 g / t of gold and 6.92% of copper. The gold concentrate is blended with copper smelting raw materials and then enters the copper smelting system.

[0156] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A method for recovering valuable metals from copper electrolytic mud and acid leaching mud, characterized in that, Includes the following steps: (1) Mixing and blending of ore To ensure the uniformity of electrolytic mud and acid leaching mud, the electrolytic mud and acid leaching mud are first mixed separately, and a composite sample is made from the mixed electrolytic mud and sulfuric acid mud. (2) Grinding The composite sample described in step (1) is used as the raw ore for grinding to obtain a slurry with a grinding concentration of 50-60% and a grinding fineness of less than 0.074 mm of 95-98%. (3) Rapid flotation Adjust the pulp concentration in step (2) to 35-50%. Based on the dry weight of the raw ore, first add 300-400 g / t of copper sulfate activator, 2000-4000 g / t of sodium sulfide, 250-350 g / t of butyl xanthate collector, and 150-200 g / t of frother ester 115. The flotation time is 2-3 min to obtain concentrate I and fast flotation tailings. Concentrate I contains 10.78-12.56 g / t of gold with a gold recovery rate of 37.85-42.45%, 1223.65-1598.57 g / t of silver with a silver recovery rate of 35.59%-39.73%, and 6.12-7.54% of copper with a copper recovery rate of 18.43-19.32%. (4) Rough selection In step (3), add 800-1000 g / t of slime remover CMH, 100-200 g / t of activator copper sulfate, 500-1000 g / t of sodium sulfide, 250-350 g / t of collector butyl xanthate, and 40-60 g / t of frother ester 115 to the rapid flotation tailings. The flotation time is 3-5 min. Then add 500-800 g / t of slime remover CMH, 50-100 g / t of activator copper sulfate, 300-500 g / t of sodium sulfide, 100-150 g / t of collector butyl xanthate, and 20-30 g / t of frother ester 115. The flotation time is 2-4 min. Then add 500-600 g / t of slime remover CMH, 80-100 g / t of collector butyl xanthate, and 115 of frother ester 115. 10~15g / t, flotation time is 2~3min, to obtain rough concentrate I and rougher tailings; (5) Scan 1 In step (4), add 400-600 g / t of slime remover CMH, 200-300 g / t of activator sodium sulfide, 80-120 g / t of collector butyl xanthate, and 20-30 g / t of frother ester 115 to the roughing tailings. The flotation time is 2-3 min. Then add 300-500 g / t of slime remover CMH, 100-150 g / t of activator sodium sulfide, 60-100 g / t of collector butyl xanthate, and 10-20 g / t of frother ester 115. The flotation time is 2-3 min to obtain middlings III and scavenging tailings I. (6) Scan 2 In step (5), 60-100 g / t of collector butyl xanthate and 10-20 g / t of frother ester 115 are added to the scavenged tailings I. The flotation time is 2-3 min to obtain middlings IV and scavenged tailings II. (7) Scan 3 In step (6), 50-80 g / t of collector butyl xanthate and 5-10 g / t of frother ester 115 are added to the scavenging tailings II. The flotation time is 2-3 min to obtain middlings VII and tailings. (8) Selected 1 The rough concentrate I is further refined by adding 60-100 g / t of collector butyl xanthate and 10-20 g / t of frother ester 115, and the flotation time is 5-7 min. Then, 60-100 g / t of butyl xanthate and 10-20 g / t of frother ester 115 are added again, and the flotation time is 5-6 min to obtain refined concentrate I and middlings II. (9) Separate processing of medium-sized ore Middle ore II, Middle ore III, and Middle ore IV are combined, and 300-500 g / t of slime remover CMH, 100-150 g / t of collector butyl xanthate, and 10-20 g / t of frother ester 115 are added. The flotation time is 5-8 min. Then, 10-20 g / t of frother ester 115 is added, and the flotation time is 5-6 min to obtain Middle ore V and Middle ore VI. (10) Selected 2 The selected concentrate I and middlings V were combined for a second cleaning process. Butyl xanthate collector 100-150 g / t and frother ester 115 10-20 g / t were added, and the flotation time was 5-7 min. Then, frother ester 115 10-20 g / t was added again, and the flotation time was 5-6 min, yielding concentrate II and middlings I. Concentrate II contained 9.78-11.34 g / t of gold with a gold recovery rate of 33.34-39.71%, 1198.75-1457.54 g / t of silver with a silver recovery rate of 36.78%-40.21%, and 5.89-6.67% of copper with a copper recovery rate of 16.78-18.15%. (11) Return of Zhongkuang Middle ore I returns to the fine separation operation 1; middle ore VI returns to the roughing operation; middle ore VII returns to the scavenging operation 1. (12) Ore blending and smelting The concentrate I obtained in step (3) and the concentrate II obtained in step (10) are combined as gold concentrate. The gold concentrate is blended with copper smelting raw materials and then enters the copper smelting system.

2. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (3), the pulp concentration in step (2) is adjusted to 42%, and the following are added: 350 g / t copper sulfate activator, 3000 g / t sodium sulfide, 300 g / t butyl xanthate collector, 170 g / t frother ester 115, and the flotation time is 2.5 min.

3. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (4), 900 g / t of slime remover CMH, 150 g / t of activator copper sulfate, 750 g / t of sodium sulfide, 300 g / t of collector butyl xanthate, and 50 g / t of frother ester 115 are added. The flotation time is 4 min. Then, 650 g / t of slime remover CMH, 75 g / t of activator copper sulfate, 400 g / t of sodium sulfide, 125 g / t of collector butyl xanthate, and 25 g / t of frother ester 115 are added. The flotation time is 3 min. Then, 550 g / t of slime remover CMH, 90 g / t of collector butyl xanthate, and 13 g / t of frother ester 115 are added. The flotation time is 2.5 min.

4. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (5), 500 g / t of slime remover CMH, 250 g / t of activator sodium sulfide, 100 g / t of collector butyl xanthate, and 25 g / t of frother ester 115 are added, and the flotation time is 2.5 min. Then, 400 g / t of slime remover CMH, 125 g / t of activator sodium sulfide, 80 g / t of collector butyl xanthate, and 15 g / t of frother ester 115 are added, and the flotation time is 2.5 min.

5. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (6), 80 g / t of butyl xanthate collector and 15 g / t of frother ester 115 are added, and the flotation time is 2.5 min.

6. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (7), 65 g / t of butyl xanthate collector and 115 g / t of frother ester are added, and the flotation time is 2.5 min.

7. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (8), 80 g / t of butyl xanthate collector and 115 g / t of frother ester are added, and the flotation time is 6 min. Then, 80 g / t of butyl xanthate and 115 g / t of frother ester are added, and the flotation time is 5.5 min.

8. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (9), 400 g / t of slime remover CMH, 125 g / t of collector butyl xanthate, and 115 g / t of frother ester were added, and the flotation time was 6.5 min. In step (9), 115 g / t of frother ester was added, and the flotation time was 5.5 min.

9. The method for recovering valuable metals from copper electrolytic mud and acid leaching mud according to claim 1, characterized in that: In step (10), 125 g / t of butyl xanthate collector and 115 g / t of frother ester are added, and the flotation time is 6 min. In step (2), 115 g / t of frother ester is added, and the flotation time is 5.5 min.