Preparation method of silver electrolyte

An electrolyte and gold liquid technology, applied in the field of comprehensive utilization of non-ferrous metallurgical resources, can solve the problems of high reagent consumption and operation intensity, reduce the direct yield of silver electrolysis process, etc., and achieve high environmental protection benefits, low cost, simple and easy operation. row effect

Inactive Publication Date: 2017-11-07
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reagent consumption and operation intensity of this method are large, and the direct recovery rate in the silver electrolysis process is reduced

Method used

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  • Preparation method of silver electrolyte

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Effect test

Embodiment 1

[0029] see figure 1 , which is a process flow diagram of a method for preparing a silver electrolyte according to an embodiment of the present invention.

[0030] A kind of comprehensive utilization method of silver anode cloth bag washing water comprises the following steps:

[0031] (1) Concentrated crystallization

[0032] Pump 500L gold separation liquid into the concentrated crystallizer. The composition of the gold separation liquid is as follows: Ag 280g / L, Cu 4.5g / L, Pd 1.10g / L, Au 0.012g / L, Pb 0.26g / L, Bi 2.6g / L, control the temperature at 100°C, concentrate until the volume is 1 / 2 (that is, 250L), release the material, and carry out solid-liquid separation (filtering) after it cools and crystallizes naturally to obtain filtrate and silver nitrate crystals. The filtrate is sent to the palladium recovery process.

[0033] (2) Crystal washing

[0034] The obtained silver nitrate crystals are dried and placed in a cylindrical filter device, controlled at a negative p...

Embodiment 2

[0041] see figure 1 , which is a process flow diagram of a method for preparing a silver electrolyte according to an embodiment of the present invention.

[0042] A kind of comprehensive utilization method of silver anode cloth bag washing water comprises the following steps:

[0043] (1) Concentrated crystallization

[0044] Pump 500L gold separation liquid into the concentrated crystallizer. The composition of the gold separation liquid is as follows: Ag 320g / L, Cu 5.2g / L, Pd 1.20g / L, Au 0.015g / L, Pb 0.32g / L, Bi 3.6g / L. , control the temperature at 110°C, and concentrate to 1 / 3 of the volume (that is, 167L), release the material, and perform solid-liquid separation (filtering) after natural cooling and crystallization to obtain the filtrate and silver nitrate crystals, and the obtained filtrate is sent to palladium for recovery process.

[0045] (2) Crystal washing

[0046] The obtained silver nitrate crystals are dried and put into the cylindrical filter equipment, and t...

Embodiment 3

[0053] see figure 1 , which is a process flow diagram of a method for preparing a silver electrolyte according to an embodiment of the present invention.

[0054] A kind of comprehensive utilization method of silver anode cloth bag washing water comprises the following steps:

[0055] (1) Concentrated crystallization

[0056] Pump 500L gold separation liquid into the concentrated crystallizer. The composition of the gold separation liquid is as follows: Ag 300g / L, Cu 5.0g / L, Pd 1.15g / L, Au 0.014g / L, Pb 0.29g / L, Bi 3.1g / L, control the temperature at 120°C, concentrate to 1 / 3 of the volume (being 167L), release the material, and carry out solid-liquid separation (filtering) after it cools and crystallizes naturally to obtain the filtrate and silver nitrate crystals, the obtained The filtrate is sent to the palladium recovery process.

[0057] (2) Crystal washing

[0058] The obtained silver nitrate crystals are dried and placed in a cylindrical filter device, controlled at a...

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Abstract

The invention discloses a preparation method of a silver electrolyte. The preparation method comprises the following steps that (1) parting liquid is concentrated, then cooled and crystallized, then solid-liquid separation is conducted, and filtrate and silver nitrate crystals are obtained; (2) the silver nitrate crystals are pumped and filtered under the negative pressure and then washed till the silver nitrate crystals are colourless; (3) deionized water is added into the colorless silver nitrate crystals, the silver nitrate crystals is heated through steam and stirred to be completely dissolved, after the final pH value of a solution is adjusted to 5.0-6.5, solid-liquid separation is conducted, and hydrolysis residue and silver nitrate solution are obtained; and (4) after the concentration of Ag+ and the acidity of nitric acid in the silver nitrate solution are adjusted, the silver nitrate solution returns to an electrolytic bath to be electrolyzed. According to the preparation method of the silver electrolyte, the technological process is simple, operation is easy and convenient, the cost is low, the environment-friendly benefits are high, the direct recovery rate of silver in the electrolyzing process can be effectively increased and can reach 92%-93.5%, the repeated recovery times of metal in the smelting process are decreased, the production cost is saved, and the economic benefits of enterprises are improved.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of nonferrous metallurgical resources, in particular to a preparation method of silver electrolyte. Background technique [0002] The precious metals gold, platinum and palladium are enriched in the noble lead during the lead smelting process, and the noble lead is smelted in a converter to obtain crude silver, and precious metals such as gold, platinum and palladium are enriched in the crude silver. The crude silver fused cast alloy plate is used as the anode, and the finished silver and silver anode slime can be obtained after silver electrolysis, while gold, platinum and palladium are left in the silver anode slime, and a small amount of platinum and palladium enter the electrolyte. In the silver smelting process, platinum and palladium are mainly recovered from silver anode slime through wet process. The anode slime produced by silver electrolysis is dissolved in nitric acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/20C25C7/06C22B11/00
CPCC22B11/04C25C1/20C25C7/06Y02P10/20
Inventor 黄鹏飞覃小龙李环陈兰
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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