Recovery system and recovery method for gold in gold separation liquid

Abstract

The invention discloses a recovery system and a recovery method for gold in a gold separation liquid, and the recovery system comprises an ion recognition system, a reduction system, a washing system and an evaporation system; the recovery method specifically comprises the following steps: (1) primary identification; (2) secondary identification; (3) reducing and depositing gold; (4) washing the gold powder; and (5) waste liquid evaporation. According to the method, AuCl4 <-> is recognized through chloride ions, the gold-rich liquid is directly reduced to produce a qualified gold powder product (99.995%), the gold-poor liquid and the reduced liquid are evaporated and concentrated, the condensate is recycled, the chloride ions are recovered and regenerated, the ion recognition agent is recycled, and no waste liquid or waste gas is generated in the production process.

Description

Technical Field

[0001] The invention relates to the technical field of precious metal hydrometallurgy, and more particularly to a gold recovery system and a gold recovery method in gold separation liquid. Background Art

[0002] There are many methods to recover gold from gold separation liquid, but they all have certain limitations. The gold production method generally adopts the method of reduction-electrolysis-melting and reduction-chlorination-reduction. Among them, the method of reduction-electrolysis has a large system storage and has requirements for the composition of the gold anode plate; the method of reduction-chlorination-reduction has a long process, low gold direct recovery, poor reducing agent selectivity, poor working environment, and unstable gold quality.

[0003] As the ingredients in the raw materials become more complex, the gold concentration in the gold separation liquid of each factory varies greatly. It is usually difficult to produce qualified gold in one go with a low-concentration gold separation liquid, and all gold must go through an enrichment and refining process.

[0004] Therefore, how to develop a gold production system and method that is highly selective, adaptable, efficient, and environmentally friendly is an issue that those skilled in the art are eager to solve. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a gold recovery system and a recovery method in a gold separation solution to solve the deficiencies in the prior art. 4 - The gold-rich liquid is directly reduced to produce qualified gold powder products (99.995%), the gold-poor liquid and the reduced liquid are evaporated and concentrated, the condensate is reused, the chloride ion is restored and regenerated, and the ion identifier is recycled. No waste liquid or waste gas is generated in the production process.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A gold recovery system in a gold separation liquid comprises an ion recognition system, a reduction system, a washing system and an evaporation system;

[0008] The ion recognition system includes a gold separation liquid storage tank, a gold separation liquid metering tank, a gold-carrying liquid storage tank, a gold-carrying liquid metering tank, an ion recognition agent storage tank, an ion recognition agent metering tank, a first recognition reactor, a second recognition reactor, a gold-rich liquid pump, a secondary gold separation liquid pump, a gold-rich liquid storage tank, a secondary gold separation liquid storage tank, a gold-carrying liquid pump, a poor gold liquid storage tank and a poor gold liquid pump; the gold separation liquid storage tank is connected to the gold separation liquid metering tank and the first recognition reactor in sequence, the gold-carrying liquid storage tank is connected to the gold-carrying liquid metering tank and the first recognition reactor in sequence, and the ion recognition agent is connected to the gold separation liquid metering tank and the first recognition reactor in sequence. The storage tank is connected to the ion recognition agent metering tank and the first recognition reactor in sequence, and the first recognition reactor is connected to the gold-rich liquid pump, the gold-rich liquid storage tank, and the reduction system in sequence; the ion recognition agent storage tank is connected to the ion recognition agent metering tank and the second recognition reactor in sequence, the first recognition reactor is connected to the secondary gold-separated liquid pump, the secondary gold-separated liquid storage tank, and the second recognition reactor in sequence, the second recognition reactor is connected to the gold-carrying liquid pump and the gold-carrying liquid storage tank in sequence, and the second recognition reactor is connected to the lean gold liquid pump, the lean gold liquid storage tank, and the evaporation system in sequence;

[0009] The reduction system includes a reduction reactor, a reducing agent preparation tank, a reduced liquid storage tank, an oil phase pump and a liquid phase pump; the gold-rich liquid storage tank is connected to the reduction reactor and the washing system in sequence, the reducing agent preparation tank is connected to the reduction reactor, the reduction reactor is connected to the oil phase pump and the ion recognition agent storage tank in sequence, and the reduction reactor is connected to the liquid phase pump, the reduced liquid storage tank and the evaporation system in sequence;

[0010] The washing system includes a washing barrel, a hydrochloric acid washing tank, a nitric acid washing tank, an ammonia washing tank and a pure water washing tank; the reduction reactor is connected to the washing barrel, and the hydrochloric acid washing tank, the nitric acid washing tank, the ammonia washing tank and the pure water washing tank are respectively connected to the washing barrel;

[0011] The evaporation system includes an evaporator, a condenser, a circulation tank, a circulation pump, an acid tank, a cold water barrel and a hot water barrel; the lean gold liquid storage tank and the reduced liquid storage tank are respectively connected to the circulation tank, the circulation pump, the evaporator, the condenser and the acid tank in sequence, and the cold water barrel and the hot water barrel are respectively connected to the condenser.

[0012] A method for recovering gold from a gold separation liquid, using the above recovery system, specifically comprises the following steps:

[0013] (1) One-time identification

[0014] The gold separation liquid in the gold separation liquid storage tank is discharged to the first identification reactor through the gold separation liquid metering tank, and the ion recognition agent A in the ion recognition agent storage tank is discharged to the identification first reactor through the ion recognition agent metering tank, and then the agitator of the first identification reactor is started to fully react the gold separation liquid and the ion recognition agent, and stand and separate to obtain a gold-rich liquid and a secondary gold separation liquid respectively, and finally the gold-rich liquid is discharged to the gold-rich liquid storage tank through the gold-rich liquid pump, and the secondary gold separation liquid is discharged to the secondary gold separation liquid storage tank through the secondary gold separation liquid pump;

[0015] (2) Secondary Identification

[0016] The secondary gold-separated liquid in the secondary gold-separated liquid storage tank is discharged into the second identification reactor, and the ion identifier B in the ion identifier storage tank is discharged into the second identification reactor via the ion identifier metering tank, and then the agitator of the second identification reactor is started to fully react the secondary gold-separated liquid and the ion identifier, and then stand and separate to obtain a gold-loaded liquid and a gold-poor liquid, respectively, and finally the gold-loaded liquid is discharged into the gold-loaded liquid storage tank via a gold-loaded liquid pump, and the poor gold liquid is discharged into the poor gold liquid storage tank via a poor gold liquid pump;

[0017] (3) Reduction of immersion gold

[0018] The gold-rich liquid in the gold-rich liquid storage tank is discharged into the reduction reactor, the agitator of the reduction reactor is started, the temperature is increased, and then the reducing agent in the reducing agent preparation tank is discharged into the reduction reactor, the gold-rich liquid and the reducing agent are fully reacted, the temperature is reduced, and the separation is statically performed to obtain an ion recognition agent, a reduced liquid and gold powder respectively, and finally the ion recognition agent is discharged into the ion recognition agent storage tank through an oil phase pump, the reduced liquid is discharged into the reduced liquid storage tank through a liquid phase pump, and the gold powder is discharged into the washing bucket through the bottom valve of the reduction reactor;

[0019] (4) Gold powder washing

[0020] Steam is introduced into the washing barrel to heat up and wash; the hydrochloric acid in the hydrochloric acid washing tank is discharged into the washing barrel, washed with water, filtered, and the obtained hydrochloric acid concentrated solution is discharged into the hydrochloric acid washing tank, and the pure water in the pure water washing tank is discharged into the washing barrel and washed until neutral; the ammonia water in the ammonia washing tank is discharged into the washing barrel, washed with water, filtered, and the obtained ammonia concentrated solution is discharged into the ammonia washing tank, and the pure water in the pure water washing tank is discharged into the washing barrel and washed until neutral; the nitric acid in the nitric acid washing tank is discharged into the washing barrel, washed with water, filtered, and the obtained nitric acid concentrated solution is discharged into the nitric acid washing tank, and the pure water in the pure water washing tank is discharged into the washing barrel and washed until neutral; the gold powder in the washing barrel is dried to obtain the gold powder product;

[0021] (5) Waste liquid evaporation

[0022] The lean gold liquid in the lean gold liquid storage tank and the reduced liquid in the reduced liquid storage tank are discharged to the evaporator through the circulation tank and the circulation pump respectively. At the same time, the steam valve of the evaporator is opened and the opening is adjusted for evaporation and concentration to obtain the lean gold liquid concentrate, the reduced liquid concentrate and evaporated acid mist respectively. The precious metals selenium and tellurium are further recovered from the lean gold liquid concentrate, the reduced liquid concentrate is returned to the reducing agent preparation tank, the evaporated acid mist is discharged to the condenser, and the cold water bucket and the hot water bucket are opened at the same time for condensation, and the obtained acid liquid is discharged to the acid liquid tank.

[0023] Furthermore, in the above step (1), the components of the gold separation liquid are: Au (gold) 0.30-0.38 g / L, Ag (silver) 0.05-0.15 g / L, Pt (platinum) 3 mg / L, Pd (palladium) 30 mg / L, Se (selenium) 0.9-1.5 g / L, Te (tellurium) 10-13 g / L, Bi (bismuth) 8 g / L, As (arsenic) 4 g / L and Cu (copper) 0.6-1.3 g / L, preferably Au 0.30 g / L, Ag 0.15 g / L, Pt 3 mg / L, Pd 30 mg / L, Se 1.5 g / L, Te 10 g / L, Bi 8 g / L, As 4 g / L and Cu 0.6 g / L.

[0024] Furthermore, in the above step (1), the ion recognition agent A is a mixed solution of columnar aromatics and chloroform, and the molar concentration ratio of the two is (8-10):1; the volume ratio of the separation solution and the ion recognition agent is 1:(0.8-1), preferably 1:1; the reaction temperature is 25°C (room temperature), and the reaction time is 2-3h, preferably 2h.

[0025] Furthermore, in the above step (2), the ion recognition agent B is a mixed solution of columnar aromatics and chloroform, and the molar concentration ratio of the two is (15-20):1; the volume ratio of the secondary separation solution and the ion recognition agent is 1:(0.8-1), preferably 1:0.8; the reaction temperature is 25°C (room temperature), and the time is 1-2h, preferably 2h.

[0026] Furthermore, in the above step (3), the reducing agent is ammonium oxalate, and the amount used is 1.5 times the mass of gold in the gold-rich solution; the reaction temperature is 85-95°C, preferably 85°C; and the reaction time is 4-6h, preferably 4h.

[0027] Furthermore, in the above step (5), the steam flow rate of evaporation concentration is 0.5m 3 / h, and the circulation flow rate of the gold-lean liquid and the reduced liquid is 80L / h.

[0028] Furthermore, in the above step (5), the flow rate of condensed cooling water is 50 L / h.

[0029] It can be seen from the above technical solution that compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. The present invention uses a selective ion recognition agent to selectively identify AuCl from the gold separation solution 4 - Ions can effectively separate gold from other elements. The gold-rich liquid is reduced to obtain gold. The gold-poor liquid and the reduced liquid are evaporated to achieve acid reuse. The ion identifier and reducing agent are recycled to achieve zero emission of waste liquid and waste gas.

[0031] 2. The process of the present invention is smooth and easy to operate. It has selective ion recognition and thorough separation of gold and impurity elements. The system does not involve cyanide, sulfide, nitrogen oxide and sodium ion in the traditional gold recovery process, which reduces the cost of wastewater treatment. It has high efficiency and environmental protection performance. The whole system has no waste liquid and waste gas discharge, and can achieve "one-step gold extraction". It has the advantages of low cost, high gold recovery rate, high quality, strong recognition ability, stability, strong adaptability, high efficiency and speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 It is a structural schematic diagram of the gold recovery system in the gold separation liquid of the present invention;

[0034] Figure 2 The present invention is a process flow chart of the method for recovering gold from the gold separation liquid.

[0035] Among them, 1-gold separation liquid storage tank, 2-gold separation liquid metering tank, 3-gold carrying liquid storage tank, 4-gold carrying liquid metering tank, 5-ion identification agent storage tank, 6-ion identification agent metering tank, 7-first identification reactor, 8-second identification reactor, 9-gold-rich liquid pump, 10-second gold separation liquid pump, 11-gold-rich liquid storage tank, 12-second gold separation liquid storage tank, 13-gold carrying liquid pump, 14-poor gold liquid storage tank, 15-poor gold liquid pump, 16-reduction reactor, 17-reducing agent preparation tank, 18-reduced liquid storage tank, 19-oil phase pump, 20-liquid phase pump, 21-washing barrel, 22-hydrochloric acid washing tank, 23-nitric acid washing tank, 24-ammonia washing tank, 25-pure water washing tank, 26-evaporator, 27-condenser, 28-circulation tank, 29-circulation pump, 30-acid tank, 31-cold water barrel, 32-hot water barrel. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] Example 1

[0042] Gold recovery system in gold separation liquid, such as Figure 1 As shown, it includes an ion recognition system, a reduction system, a washing system and an evaporation system;

[0043] The ion recognition system includes a gold separation liquid storage tank 1, a gold separation liquid metering tank 2, a gold-carrying liquid storage tank 3, a gold-carrying liquid metering tank 4, an ion recognition agent storage tank 5, an ion recognition agent metering tank 6, a first recognition reactor 7, a second recognition reactor 8, a gold-rich liquid pump 9, a secondary gold separation liquid pump 10, a gold-rich liquid storage tank 11, a secondary gold separation liquid storage tank 12, a gold-carrying liquid pump 13, a poor gold liquid storage tank 14 and a poor gold liquid pump 15; the gold separation liquid storage tank 1 is connected to the gold separation liquid metering tank 2 and the first recognition reactor 7 in sequence, the gold-carrying liquid storage tank 3 is connected to the gold-carrying liquid metering tank 4 and the first recognition reactor 7 in sequence, and the ion recognition agent storage tank 5 is connected to the ion recognition agent metering tank 6 and the first recognition reactor 7 in sequence (not shown in the figure), the first recognition reactor 7 is connected to the rich gold liquid pump 9, the rich gold liquid storage tank 11, and the reduction system in sequence; the ion recognition agent storage tank 5 is connected to the ion recognition agent metering tank 6 and the second recognition reactor 8 in sequence, the first recognition reactor 7 is connected to the secondary gold separation liquid pump 10, the secondary gold separation liquid storage tank 12, and the second recognition reactor 8 in sequence, the second recognition reactor 8 is connected to the gold-carrying liquid pump 13 and the gold-carrying liquid storage tank 3 in sequence, the second recognition reactor 8 is connected to the lean gold liquid pump 15, the lean gold liquid storage tank 14, and the evaporation system in sequence;

[0044] The reduction system includes a reduction reactor 16, a reducing agent preparation tank 17, a reduced liquid storage tank 18, an oil phase pump 19 and a liquid phase pump 20; the gold-rich liquid storage tank 11 is connected to the reduction reactor 16 and the washing system in sequence, the reducing agent preparation tank 17 is connected to the reduction reactor 16, the reduction reactor 16 is connected to the oil phase pump 19 and the ion recognition agent storage tank 5 in sequence, and the reduction reactor 16 is connected to the liquid phase pump 20, the reduced liquid storage tank 18 and the evaporation system in sequence;

[0045] The washing system includes a washing barrel 21, a hydrochloric acid washing tank 22, a nitric acid washing tank 23, an ammonia washing tank 24 and a pure water washing tank 25; the reduction reaction kettle 16 is connected to the washing barrel 21, and the hydrochloric acid washing tank 22, the nitric acid washing tank 23, the ammonia washing tank 24 and the pure water washing tank 25 are respectively connected to the washing barrel 21;

[0046] The evaporation system includes an evaporator 26, a condenser 27, a circulation tank 28, a circulation pump 29, an acid liquid tank 30, a cold water bucket 31 and a hot water bucket 32; the lean gold liquid storage tank 14 and the reduced liquid storage tank 18 are respectively connected to the circulation tank 28, the circulation pump 29, the evaporator 26, the condenser 27, and the acid liquid tank 30 in sequence, and the cold water bucket 31 and the hot water bucket 32 ​​are respectively connected to the condenser 27.

[0047] Example 2

[0048] Methods for recovering gold from gold separation liquid, such as Figure 2 As shown, the specific steps include:

[0049] (1) One-time identification

[0050] The gold separation liquid in the gold separation liquid storage tank 1 is discharged to the first identification reactor 7 through the gold separation liquid metering tank 2, and the ion recognition agent A in the ion recognition agent storage tank 5 is discharged to the identification first reactor 7 through the ion recognition agent metering tank 6, and then the agitator of the first identification reactor 7 is started, and the gold separation liquid and the ion recognition agent with a volume ratio of 1:1 are fully reacted at 25°C for 2h, and are allowed to stand and separate to obtain a rich gold liquid and a secondary gold separation liquid, respectively, and finally the rich gold liquid is discharged to the rich gold liquid storage tank 11 through the rich gold liquid pump 9, and the secondary gold separation liquid is discharged to the secondary gold separation liquid storage tank 12 through the secondary gold separation liquid pump 10;

[0051] The gold separation liquid is the gold separation liquid produced by chlorination gold separation of copper anode decopper slag, and its composition is: Au 0.30g / L, Ag 0.15g / L, Pt 3mg / L, Pd 30mg / L, Se 1.5g / L, Te 10g / L, Bi 8g / L, As 4g / L and Cu 0.6g / L;

[0052] The ion recognition agent A is a mixed solution of pillar aromatic hydrocarbon and chloroform, and the molar concentration ratio of the two is (8-10):1;

[0053] (2) Secondary Identification

[0054] The secondary gold-separated liquid in the secondary gold-separated liquid storage tank 12 is discharged to the second identification reactor 8, and the ion identifier B in the ion identifier storage tank 5 is discharged to the second identification reactor 8 through the ion identifier metering tank 6, and then the agitator of the second identification reactor 8 is started, and the secondary gold-separated liquid and the ion identifier with a volume ratio of 1:0.8 are fully reacted at 25° C. for 2 hours, and then allowed to stand and separate to obtain a gold-loaded liquid and a poor gold liquid, respectively, and finally the gold-loaded liquid is discharged to the gold-loaded liquid storage tank 3 through the gold-loaded liquid pump 13, and the poor gold liquid is discharged to the poor gold liquid storage tank 14 through the poor gold liquid pump 15;

[0055] The ion recognition agent B is a mixed solution of pillar aromatic hydrocarbon and chloroform, and the molar concentration ratio of the two is (15-20):1;

[0056] (3) Reduction of immersion gold

[0057] The gold-rich liquid in the gold-rich liquid storage tank 11 is discharged to the reduction reactor 16, the agitator of the reduction reactor 16 is started, and the temperature is raised to 85°C, and then the reducing agent in the reducing agent preparation tank 17 is discharged to the reduction reactor 16, and the gold-rich liquid and 1.5 times the mass of the reducing agent are fully reacted for 4 hours, cooled, and separated by standing to obtain an ion recognition agent, a reduced liquid and gold powder respectively, and finally the ion recognition agent is discharged to the ion recognition agent storage tank 5 through the oil phase pump 19, the reduced liquid is discharged to the reduced liquid storage tank 18 through the liquid phase pump 20, and the gold powder is discharged to the washing bucket 21 through the bottom valve of the reduction reactor 16;

[0058] (4) Gold powder washing

[0059] Steam is introduced into the washing barrel 21 to heat and wash; the hydrochloric acid in the hydrochloric acid washing tank 22 is discharged into the washing barrel 21, washed with water, filtered, and the obtained hydrochloric acid concentrated solution is discharged into the hydrochloric acid washing tank 22, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the ammonia water in the ammonia washing tank 24 is discharged into the washing barrel 21, washed with water, filtered, and the obtained ammonia concentrated solution is discharged into the ammonia washing tank 24, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the nitric acid in the nitric acid washing tank 23 is discharged into the washing barrel 21, washed with water, filtered, and the obtained nitric acid concentrated solution is discharged into the nitric acid washing tank 23, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the gold powder in the washing barrel 21 is dried to obtain the gold powder product;

[0060] (5) Waste liquid evaporation

[0061] The lean gold liquid in the lean gold liquid storage tank 14 and the reduced liquid in the reduced liquid storage tank 18 are discharged to the evaporator 26 through the circulation tank 28 and the circulation pump 29 respectively. At the same time, the steam valve of the evaporator 26 is opened and the opening is adjusted for evaporation and concentration. The steam flow rate of evaporation and concentration is 0.5m 3 / h, the circulation flow rate of the gold-lean liquid and the reduced liquid is 80L / h, and the gold-lean liquid concentrate, the reduced liquid concentrate and the evaporated acid mist are obtained respectively. The precious metals selenium and tellurium are further recovered from the gold-lean liquid concentrate, the reduced liquid concentrate is returned to the reducing agent preparation tank 17, and the evaporated acid mist is discharged to the condenser 27. At the same time, the cold water bucket 31 and the hot water bucket 32 ​​are opened for condensation. The cooling water flow rate of the condensation is 50L / h, and the obtained acid solution is discharged to the acid liquid tank 30.

[0062] Example 3

[0063] Methods for recovering gold from gold separation liquid, such as Figure 2 As shown, the specific steps include:

[0064] (1) One-time identification

[0065] The gold separation liquid in the gold separation liquid storage tank 1 is discharged to the first identification reactor 7 through the gold separation liquid metering tank 2, and the ion recognition agent A in the ion recognition agent storage tank 5 is discharged to the identification first reactor 7 through the ion recognition agent metering tank 6, and then the agitator of the first identification reactor 7 is started, and the gold separation liquid and the ion recognition agent with a volume ratio of 1:0.8 are fully reacted at 25°C for 2h, and then allowed to stand and separate to obtain a rich gold liquid and a secondary gold separation liquid, respectively, and finally the rich gold liquid is discharged to the rich gold liquid storage tank 11 through the rich gold liquid pump 9, and the secondary gold separation liquid is discharged to the secondary gold separation liquid storage tank 12 through the secondary gold separation liquid pump 10;

[0066] The gold separation liquid is the gold separation liquid produced by chlorination gold separation of copper anode decopper slag, and its composition is: Au 0.30g / L, Ag 0.15g / L, Pt 3mg / L, Pd 30mg / L, Se 1.5g / L, Te 10g / L, Bi 8g / L, As 4g / L and Cu 0.6g / L;

[0067] The ion recognition agent A is a mixed solution of pillar aromatic hydrocarbon and chloroform, and the molar concentration ratio of the two is (8-10):1;

[0068] (2) Secondary Identification

[0069] The secondary gold-separated liquid in the secondary gold-separated liquid storage tank 12 is discharged to the second identification reactor 8, and the ion identifier B in the ion identifier storage tank 5 is discharged to the second identification reactor 8 through the ion identifier metering tank 6, and then the agitator of the second identification reactor 8 is started, and the secondary gold-separated liquid and the ion identifier with a volume ratio of 1:1 are fully reacted at 25°C for 2h, and then allowed to stand and separate to obtain a gold-loaded liquid and a poor gold liquid, respectively, and finally the gold-loaded liquid is discharged to the gold-loaded liquid storage tank 3 through the gold-loaded liquid pump 13, and the poor gold liquid is discharged to the poor gold liquid storage tank 14 through the poor gold liquid pump 15;

[0070] The ion recognition agent B is a mixed solution of pillar aromatic hydrocarbon and chloroform, and the molar concentration ratio of the two is (15-20):1;

[0071] (3) Reduction of immersion gold

[0072] The gold-rich liquid in the gold-rich liquid storage tank 11 is discharged to the reduction reactor 16, the agitator of the reduction reactor 16 is started, and the temperature is raised to 90°C, and then the reducing agent in the reducing agent preparation tank 17 is discharged to the reduction reactor 16, and the gold-rich liquid and 1.5 times the mass of the reducing agent are fully reacted for 5 hours, cooled, and separated by standing to obtain an ion recognition agent, a reduced liquid and gold powder respectively, and finally the ion recognition agent is discharged to the ion recognition agent storage tank 5 through the oil phase pump 19, the reduced liquid is discharged to the reduced liquid storage tank 18 through the liquid phase pump 20, and the gold powder is discharged to the washing bucket 21 through the bottom valve of the reduction reactor 16;

[0073] (4) Gold powder washing

[0074] Steam is introduced into the washing barrel 21 to heat and wash; the hydrochloric acid in the hydrochloric acid washing tank 22 is discharged into the washing barrel 21, washed with water, filtered, and the obtained hydrochloric acid concentrated solution is discharged into the hydrochloric acid washing tank 22, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the ammonia water in the ammonia washing tank 24 is discharged into the washing barrel 21, washed with water, filtered, and the obtained ammonia concentrated solution is discharged into the ammonia washing tank 24, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the nitric acid in the nitric acid washing tank 23 is discharged into the washing barrel 21, washed with water, filtered, and the obtained nitric acid concentrated solution is discharged into the nitric acid washing tank 23, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the gold powder in the washing barrel 21 is dried to obtain the gold powder product;

[0075] (5) Waste liquid evaporation

[0076] The lean gold liquid in the lean gold liquid storage tank 14 and the reduced liquid in the reduced liquid storage tank 18 are discharged to the evaporator 26 through the circulation tank 28 and the circulation pump 29 respectively. At the same time, the steam valve of the evaporator 26 is opened and the opening is adjusted for evaporation and concentration. The steam flow rate of evaporation and concentration is 0.5m 3 / h, the circulation flow rate of the gold-lean liquid and the reduced liquid is 80L / h, and the gold-lean liquid concentrate, the reduced liquid concentrate and the evaporated acid mist are obtained respectively. The precious metals selenium and tellurium are further recovered from the gold-lean liquid concentrate, the reduced liquid concentrate is returned to the reducing agent preparation tank 17, and the evaporated acid mist is discharged to the condenser 27. At the same time, the cold water bucket 31 and the hot water bucket 32 ​​are opened for condensation. The cooling water flow rate of the condensation is 50L / h, and the obtained acid solution is discharged to the acid liquid tank 30.

[0077] Example 4

[0078] Methods for recovering gold from gold separation liquid, such as Figure 2 As shown, the specific steps include:

[0079] (1) One-time identification

[0080] The gold separation liquid in the gold separation liquid storage tank 1 is discharged to the first identification reactor 7 through the gold separation liquid metering tank 2, and the ion recognition agent A in the ion recognition agent storage tank 5 is discharged to the identification first reactor 7 through the ion recognition agent metering tank 6, and then the agitator of the first identification reactor 7 is started, and the gold separation liquid and the ion recognition agent with a volume ratio of 1:1 are fully reacted at 25°C for 3 hours, and are allowed to stand and separate to obtain a rich gold liquid and a secondary gold separation liquid, respectively, and finally the rich gold liquid is discharged to the rich gold liquid storage tank 11 through the rich gold liquid pump 9, and the secondary gold separation liquid is discharged to the secondary gold separation liquid storage tank 12 through the secondary gold separation liquid pump 10;

[0081] The gold separation liquid is the gold separation liquid produced by chlorination gold separation of copper anode decopper slag, and its composition is: Au 0.30g / L, Ag 0.15g / L, Pt 3mg / L, Pd 30mg / L, Se 1.5g / L, Te 10g / L, Bi 8g / L, As 4g / L and Cu 0.6g / L;

[0082] The ion recognition agent A is a mixed solution of pillar aromatic hydrocarbon and chloroform, and the molar concentration ratio of the two is (8-10):1;

[0083] (2) Secondary Identification

[0084] The secondary gold-separated liquid in the secondary gold-separated liquid storage tank 12 is discharged to the second identification reactor 8, and the ion identifier B in the ion identifier storage tank 5 is discharged to the second identification reactor 8 through the ion identifier metering tank 6, and then the agitator of the second identification reactor 8 is started, and the secondary gold-separated liquid and the ion identifier with a volume ratio of 1:0.8 are fully reacted at 25°C for 1 hour, and then allowed to stand and separate to obtain a gold-loaded liquid and a poor gold liquid, respectively, and finally the gold-loaded liquid is discharged to the gold-loaded liquid storage tank 3 through the gold-loaded liquid pump 13, and the poor gold liquid is discharged to the poor gold liquid storage tank 14 through the poor gold liquid pump 15;

[0085] The ion recognition agent B is a mixed solution of pillar aromatic hydrocarbon and chloroform, and the molar concentration ratio of the two is (15-20):1;

[0086] (3) Reduction of immersion gold

[0087] The gold-rich liquid in the gold-rich liquid storage tank 11 is discharged to the reduction reactor 16, the agitator of the reduction reactor 16 is started, and the temperature is raised to 95°C, and then the reducing agent in the reducing agent preparation tank 17 is discharged to the reduction reactor 16, and the gold-rich liquid and 1.5 times the mass of the reducing agent are fully reacted for 6 hours, cooled, and separated by standing to obtain an ion recognition agent, a reduced liquid and gold powder respectively, and finally the ion recognition agent is discharged to the ion recognition agent storage tank 5 through the oil phase pump 19, the reduced liquid is discharged to the reduced liquid storage tank 18 through the liquid phase pump 20, and the gold powder is discharged to the washing bucket 21 through the bottom valve of the reduction reactor 16;

[0088] (4) Gold powder washing

[0089] Steam is introduced into the washing barrel 21 to heat and wash; the hydrochloric acid in the hydrochloric acid washing tank 22 is discharged into the washing barrel 21, washed with water, filtered, and the obtained hydrochloric acid concentrated solution is discharged into the hydrochloric acid washing tank 22, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the ammonia water in the ammonia washing tank 24 is discharged into the washing barrel 21, washed with water, filtered, and the obtained ammonia concentrated solution is discharged into the ammonia washing tank 24, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the nitric acid in the nitric acid washing tank 23 is discharged into the washing barrel 21, washed with water, filtered, and the obtained nitric acid concentrated solution is discharged into the nitric acid washing tank 23, and the pure water in the pure water washing tank 25 is discharged into the washing barrel 21 and washed to neutrality; the gold powder in the washing barrel 21 is dried to obtain the gold powder product;

[0090] (5) Waste liquid evaporation

[0091] The lean gold liquid in the lean gold liquid storage tank 14 and the reduced liquid in the reduced liquid storage tank 18 are discharged to the evaporator 26 through the circulation tank 28 and the circulation pump 29 respectively. At the same time, the steam valve of the evaporator 26 is opened and the opening is adjusted for evaporation and concentration. The steam flow rate of evaporation and concentration is 0.5m 3 / h, the circulation flow rate of the gold-lean liquid and the reduced liquid is 80L / h, and the gold-lean liquid concentrate, the reduced liquid concentrate and the evaporated acid mist are obtained respectively. The precious metals selenium and tellurium are further recovered from the gold-lean liquid concentrate, the reduced liquid concentrate is returned to the reducing agent preparation tank 17, and the evaporated acid mist is discharged to the condenser 27. At the same time, the cold water bucket 31 and the hot water bucket 32 ​​are opened for condensation. The cooling water flow rate of the condensation is 50L / h, and the obtained acid solution is discharged to the acid liquid tank 30.

[0092] Performance Testing

[0093] The gold powder products (sponge gold) prepared in Examples 2-4 were respectively tested and analyzed according to the GB / T4134-2021 standard. The results are shown in Table 1.

[0094] Table 1 Gold content of gold powder products in Example 2-4

[0095] Gold powder products Example 2 Example 3 Example 4 Gold content (%) 99.995 99.995 99.995

[0096] It can be seen from Table 1 that the gold content of the gold powder products of Examples 2-4 of the present invention reaches 99.995%.

[0097] The above experiments show that the present invention recognizes AuCl by chloride ions. 4 - The gold-rich liquid is directly reduced to produce qualified gold powder products (99.995%), the gold-poor liquid and the reduced liquid are evaporated and concentrated, the condensate is reused, the chloride ion is restored and regenerated, and the ion identifier is recycled. No waste liquid or waste gas is generated in the production process.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0099] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A gold recovery system in gold separation liquid, characterized in that: It includes ion recognition system, reduction system, washing system and evaporation system; The ion recognition system comprises a gold separation liquid storage tank, a gold separation liquid metering tank, a gold-carrying liquid storage tank, a gold-carrying liquid metering tank, an ion recognition agent storage tank, an ion recognition agent metering tank, a first recognition reactor, a second recognition reactor, a gold-rich liquid pump, a secondary gold separation liquid pump, a gold-rich liquid storage tank, a secondary gold separation liquid storage tank, a gold-carrying liquid pump, a poor gold liquid storage tank and a poor gold liquid pump; the gold separation liquid storage tank is connected to the gold separation liquid metering tank and the first recognition reactor in sequence, the gold-carrying liquid storage tank is connected to the gold-carrying liquid metering tank and the first recognition reactor in sequence, the ion recognition agent storage tank is connected to the ion recognition agent metering tank, The first identification reactor is connected in sequence, the first identification reactor is connected with the gold-rich liquid pump, the gold-rich liquid storage tank, and the reduction system in sequence; the ion recognition agent storage tank is connected with the ion recognition agent metering tank and the second identification reactor in sequence, the first identification reactor is connected with the secondary gold-separated liquid pump, the secondary gold-separated liquid storage tank, and the second identification reactor in sequence, the second identification reactor is connected with the gold-carrying liquid pump and the gold-carrying liquid storage tank in sequence, the second identification reactor is connected with the lean gold liquid pump, the lean gold liquid storage tank, and the evaporation system in sequence; The reduction system includes a reduction reactor, a reducing agent preparation tank, a reduced liquid storage tank, an oil phase pump and a liquid phase pump; the gold-rich liquid storage tank is connected to the reduction reactor and the washing system in sequence, the reducing agent preparation tank is connected to the reduction reactor, the reduction reactor is connected to the oil phase pump and the ion recognition agent storage tank in sequence, and the reduction reactor is connected to the liquid phase pump, the reduced liquid storage tank and the evaporation system in sequence; The washing system comprises a washing barrel, a hydrochloric acid washing tank, a nitric acid washing tank, an ammonia washing tank and a pure water washing tank; the reduction reactor is connected to the washing barrel, and the hydrochloric acid washing tank, the nitric acid washing tank, the ammonia washing tank and the pure water washing tank are respectively connected to the washing barrel; The evaporation system includes an evaporator, a condenser, a circulation tank, a circulation pump, an acid liquid tank, a cold water bucket and a hot water bucket; the lean gold liquid storage tank and the reduced liquid storage tank are respectively connected to the circulation tank, the circulation pump, the evaporator, the condenser and the acid liquid tank in sequence, and the cold water bucket and the hot water bucket are respectively connected to the condenser.

2. A method for recovering gold from a gold separation liquid, characterized in that: The recycling system as claimed in claim 1 specifically comprises the following steps: (1) One-time identification The gold separation liquid in the gold separation liquid storage tank is discharged to the first identification reactor through the gold separation liquid metering tank, and the ion recognition agent A in the ion recognition agent storage tank is discharged to the identification first reactor through the ion recognition agent metering tank, and then the agitator of the first identification reactor is started to fully react the gold separation liquid and the ion recognition agent, and stand and separate to obtain a gold-rich liquid and a secondary gold separation liquid respectively, and finally the gold-rich liquid is discharged to the gold-rich liquid storage tank through the gold-rich liquid pump, and the secondary gold separation liquid is discharged to the secondary gold separation liquid storage tank through the secondary gold separation liquid pump; (2) Secondary Identification The secondary gold-separated liquid in the secondary gold-separated liquid storage tank is discharged into the second identification reactor, and the ion identifier B in the ion identifier storage tank is discharged into the second identification reactor via the ion identifier metering tank, and then the agitator of the second identification reactor is started to fully react the secondary gold-separated liquid and the ion identifier, and then stand and separate to obtain a gold-loaded liquid and a gold-poor liquid, respectively, and finally the gold-loaded liquid is discharged into the gold-loaded liquid storage tank via a gold-loaded liquid pump, and the poor gold liquid is discharged into the poor gold liquid storage tank via a poor gold liquid pump; (3) Reduction of immersion gold The gold-rich liquid in the gold-rich liquid storage tank is discharged into the reduction reactor, the agitator of the reduction reactor is started, the temperature is increased, and then the reducing agent in the reducing agent preparation tank is discharged into the reduction reactor, the gold-rich liquid and the reducing agent are fully reacted, the temperature is reduced, and the separation is statically performed to obtain an ion recognition agent, a reduced liquid and gold powder respectively, and finally the ion recognition agent is discharged into the ion recognition agent storage tank through an oil phase pump, the reduced liquid is discharged into the reduced liquid storage tank through a liquid phase pump, and the gold powder is discharged into the washing bucket through the bottom valve of the reduction reactor; (4) Gold powder washing Steam is introduced into the washing barrel to heat up and wash; the hydrochloric acid in the hydrochloric acid washing tank is discharged into the washing barrel, washed with water, filtered, and the obtained hydrochloric acid concentrated solution is discharged into the hydrochloric acid washing tank, and the pure water in the pure water washing tank is discharged into the washing barrel and washed until neutral; the ammonia water in the ammonia washing tank is discharged into the washing barrel, washed with water, filtered, and the obtained ammonia concentrated solution is discharged into the ammonia washing tank, and the pure water in the pure water washing tank is discharged into the washing barrel and washed until neutral; the nitric acid in the nitric acid washing tank is discharged into the washing barrel, washed with water, filtered, and the obtained nitric acid concentrated solution is discharged into the nitric acid washing tank, and the pure water in the pure water washing tank is discharged into the washing barrel and washed until neutral; the gold powder in the washing barrel is dried to obtain the gold powder product; (5) Waste liquid evaporation The lean gold liquid in the lean gold liquid storage tank and the reduced liquid in the reduced liquid storage tank are discharged to the evaporator through the circulation tank and the circulation pump respectively. At the same time, the steam valve of the evaporator is opened and the opening is adjusted for evaporation and concentration to obtain the lean gold liquid concentrate, the reduced liquid concentrate and evaporated acid mist respectively. The precious metals selenium and tellurium are further recovered from the lean gold liquid concentrate, the reduced liquid concentrate is returned to the reducing agent preparation tank, the evaporated acid mist is discharged to the condenser, and the cold water bucket and the hot water bucket are opened at the same time for condensation, and the obtained acid liquid is discharged to the acid liquid tank.

3. The method for recovering gold from a gold separation liquid according to claim 2, characterized in that: In step (1), the composition of the gold separation solution is: Au 0.30-0.38 g / L, Ag 0.05-0.15 g / L, Pt 3 mg / L, Pd 30 mg / L, Se 0.9-1.5 g / L, Te 10-13 g / L, Bi 8 g / L, As 4 g / L and Cu 0.6-1.3 g / L.

4. The method for recovering gold from a gold separation liquid according to claim 2, characterized in that: In step (1), the ion recognition agent A is a mixed solution of columnar aromatics and chloroform, and the molar concentration ratio of the two is (8-10):1; the volume ratio of the gold separation solution and the ion recognition agent is 1:(0.8-1); the reaction temperature is 25°C and the reaction time is 2-3h.

5. The method for recovering gold from a gold separation liquid according to claim 2, characterized in that: In step (2), the ion recognition agent B is a mixed solution of columnar aromatics and chloroform, and the molar concentration ratio of the two is (15-20):1; the volume ratio of the secondary separation solution and the ion recognition agent is 1:(0.8-1); the reaction temperature is 25°C and the time is 1-2h.

6. The method for recovering gold from a gold separation liquid according to claim 2, characterized in that: In step (3), the reducing agent is ammonium oxalate, and the amount used is 1.5 times the mass of gold in the gold-rich solution; the reaction temperature is 85-95°C and the reaction time is 4-6h.

7. The method for recovering gold from a gold separation liquid according to claim 2, characterized in that: In step (5), the steam flow rate of the evaporation concentration is 0.5m 3 / h, and the circulation flow rate of the gold-lean liquid and the reduced liquid is 80L / h.

8. The method for recovering gold from a gold separation liquid according to claim 2, characterized in that: In step (5), the condensed cooling water flow rate is 50 L / h.

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