Spent solution treatment method of silver electrolyte

Abstract

The invention discloses a spent solution treatment method of a silver electrolyte. A silver electrolyte spent solution, as a silver electro-deposition liquid, is fed into a whirl-flow electro-deposition system to perform primary electro-deposition; and then metal copper is added to a low-silver liquid to replace crude silver powder; a desilverized solution, as a copper electro-deposition mother liquid, is fed into the whirl-flow electro-deposition system to perform secondary electro-deposition; and finally, a part of a low-copper liquid is fed back to a sliver liquid preparing system, while the rest part of the low-copper liquid is sent to an environmental protection workshop for treatment. The spent solution treatment method of the silver electrolyte is simple in processes, convenient to carry out and low in cost, can be used for directly recycling valuable metal, such as silver, copper and the like, in a high-effective, low-cost and high-recovery-rate manner.

Description

technical field

[0001] The invention relates to the comprehensive utilization technology of non-ferrous metal hydrometallurgical resources, in particular to a treatment method for silver electrolyte solution. Background technique

[0002] The silver electrolytic refining process belongs to the electrochemical impurity removal process of silver. In this process, the metal impurities in the alloy plate that are more electropositive than silver do not undergo electrochemical dissolution, and are removed as anode slime; the metal impurities that are more electronegative than silver Into the electrolyte, so as to achieve the purpose of refining silver. Copper is one of the main metal impurities in the crude alloy, and its content is usually the highest. Its standard electrode potential is much more negative than that of silver. During the electrolytic refining process of silver, the copper in the alloy plate will be oxidized into ions and enriched. into the electrolyte. In the ...

Examples

Embodiment 1

[0027] In the silver electrolytic refining process, 50L of the open-circuit silver electrolytic liquid containing 100g / L of silver and 30g / L of copper was subjected to the first cyclone electrowinning at a flow rate of 3m / s, and standard silver powder and low silver liquid were produced. The silver content in the low-silver solution is 7g / L, and the copper content is 30g / L; then, a small amount of copper powder is added to replace the silver at 75°C, and the coarse silver powder and the silver-removing solution are obtained. The silver in the silver-removing solution The copper content is 4 mg / L, and the copper content is 36 g / L; again, the desilvering liquid is subjected to the second cyclone electrowinning to produce standard cathode copper and low copper liquid, and the copper content in the low copper liquid is 4g / L L; Finally, return 70% of the low-copper liquid obtained to silver electrolysis, and send 30% of the low-copper liquid to the environmental protection workshop ...

Embodiment 2

[0029] In the silver electrolytic refining process, 50 L of the open-circuit silver electrolytic solution containing 120 g / L of silver and 35 g / L of copper was subjected to the first cyclone electrowinning at a flow rate of 3.3 m / s, and standard silver powder was produced. and low-silver solution, the silver content in the low-silver solution is 8 g / L, and the copper content is 35 g / L; then, a small amount of copper powder is added to replace silver at 80 °C, and coarse silver powder and desilvering solution are obtained. The silver content in the desilvering liquid is 4 mg / L, and the copper content is 40 g / L; Again, the desilvering liquid is carried out the second cyclone electrowinning with the flow velocity of 1.5m / s, and output standard cathode copper and low Copper liquid, the copper content in the low copper liquid is 4 g / L; thereafter, the decopper liquid is subjected to the third cyclone electrowinning at a flow rate of 2 m / s to produce blister copper and decopper liqui...

Embodiment 3

[0031] In the silver electrolytic refining process, 50 L of the open-circuit silver electrolytic solution containing 90 g / L of silver and 25 g / L of copper was subjected to the first cyclone electrowinning at a flow rate of 3.5 m / s, and standard silver powder was produced. and low-silver solution, the silver content in the low-silver solution is 5 g / L, and the copper content is 25 g / L; then, a small amount of copper powder is added to replace silver at 80 °C, and coarse silver powder and desilverization solution are obtained. The silver content in the desilvering solution is 4 mg / L, and the copper content is 28 g / L; again, the desilvering solution is subjected to the second cyclone electrowinning at a flow rate of 2 m / s to produce standard cathode copper and Low-copper solution, the copper content in the low-copper solution is 3 g / L; then, the decopper solution is subjected to the third cyclone electrowinning at a flow rate of 3 m / s to produce blister copper and decopper solutio...

technical field

[0001] The invention relates to the comprehensive utilization technology of non-ferrous metal hydrometallurgical resources, in particular to a treatment method for silver electrolyte solution. Background technique

[0002] The silver electrolytic refining process belongs to the electrochemical impurity removal process of silver. In this process, the metal impurities in the alloy plate that are more electropositive than silver do not undergo electrochemical dissolution, and are removed as anode slime; the metal impurities that are more electronegative than silver Into the electrolyte, so as to achieve the purpose of refining silver. Copper is one of the main metal impurities in the crude alloy, and its content is usually the highest. Its standard electrode potential is much more negative than that of silver. During the electrolytic refining process of silver, the copper in the alloy plate will be oxidized into ions and enriched. into the electrolyte. In the ...

Examples

Embodiment 1

[0027] In the silver electrolytic refining process, 50L of the open-circuit silver electrolytic liquid containing 100g / L of silver and 30g / L of copper was subjected to the first cyclone electrowinning at a flow rate of 3m / s, and standard silver powder and low silver liquid were produced. The silver content in the low-silver solution is 7g / L, and the copper content is 30g / L; then, a small amount of copper powder is added to replace the silver at 75°C, and the coarse silver powder and the silver-removing solution are obtained. The silver in the silver-removing solution The copper content is 4 mg / L, and the copper content is 36 g / L; again, the desilvering liquid is subjected to the second cyclone electrowinning to produce standard cathode copper and low copper liquid, and the copper content in the low copper liquid is 4g / L L; Finally, return 70% of the low-copper liquid obtained to silver electrolysis, and send 30% of the low-copper liquid to the environmental protection workshop ...

Embodiment 2

[0029] In the silver electrolytic refining process, 50 L of the open-circuit silver electrolytic solution containing 120 g / L of silver and 35 g / L of copper was subjected to the first cyclone electrowinning at a flow rate of 3.3 m / s, and standard silver powder was produced. and low-silver solution, the silver content in the low-silver solution is 8 g / L, and the copper content is 35 g / L; then, a small amount of copper powder is added to replace silver at 80 °C, and coarse silver powder and desilvering solution are obtained. The silver content in the desilvering liquid is 4 mg / L, and the copper content is 40 g / L; Again, the desilvering liquid is carried out the second cyclone electrowinning with the flow velocity of 1.5m / s, and output standard cathode copper and low Copper liquid, the copper content in the low copper liquid is 4 g / L; thereafter, the decopper liquid is subjected to the third cyclone electrowinning at a flow rate of 2 m / s to produce blister copper and decopper liqui...

Embodiment 3

[0031] In the silver electrolytic refining process, 50 L of the open-circuit silver electrolytic solution containing 90 g / L of silver and 25 g / L of copper was subjected to the first cyclone electrowinning at a flow rate of 3.5 m / s, and standard silver powder was produced. and low-silver solution, the silver content in the low-silver solution is 5 g / L, and the copper content is 25 g / L; then, a small amount of copper powder is added to replace silver at 80 °C, and coarse silver powder and desilverization solution are obtained. The silver content in the desilvering solution is 4 mg / L, and the copper content is 28 g / L; again, the desilvering solution is subjected to the second cyclone electrowinning at a flow rate of 2 m / s to produce standard cathode copper and Low-copper solution, the copper content in the low-copper solution is 3 g / L; then, the decopper solution is subjected to the third cyclone electrowinning at a flow rate of 3 m / s to produce blister copper and decopper solutio...