Silver electrolyzing process
A technology, silver technology, applied in the field of silver electrolysis technology, can solve the problems of uneven incoming raw materials, difficult silver powder cleaning, electrolyte pollution, etc., to achieve the effect of simplified operation, good promotion and application value, and low price
Inactive Publication Date: 2007-03-21
灵宝金源桐辉精炼股份有限公司
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Problems solved by technology
This kind of process has the following problems: the use of a single electrolytic cell will cause uneven raw materials, and the resulting electrolyte is easily polluted and scrapped; and the electrolytic cell is designed according to the size of the production capacity, so that the electrolyte The backlog is fixed and cannot be adjusted according to the raw material conditions, thereby limiting production; in addition, because the existing process uses manual removal of the silver powder from the electrolytic cell, the labor intensity is high, the work efficiency is low, and it is not easy to remove the silver powder. fish clean
Method used
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[0012] As shown in Figure 1, the silver electrolysis process of the present invention comprises the following steps: (1) making liquid, put into titanium reactor with 99.9% silver powder, add nitric acid in the reactor according to the reaction ratio, stir and dissolve, after dissolving completely , the concentration of silver ions is 200g / l, and the concentration of nitric acid is 15g / l; (2) electrolysis, put the prepared electrolyte into six electrolytic cells arranged side by side respectively, hang the miscellaneous silver plate to the anode, and the cathode plate adopts Titanium-clad copper cathode plate, connect the electrode to start electrolysis, at the beginning, the current density is required to reach 200A / m 2 , after the temperature reaches 40°C, increase the current density to 300A / m 2 , start normal electrolysis, measure the acidity and silver ion concentration every 2 hours, the acidity in this embodiment is 30g / l, when the acidity does not meet the requirements...
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Abstract
The silver electrolyzing process includes the following steps: 1. forming electrolyte with Ag ion concentration of 150-250 g / L through mixing silver powder and nitric acid solution in certain ratio and stirring for dissolving Ag; 2. electrolyzing inside an electrolytic bath with the formed electrolyte, anode of coarse silver plate and cathode of titanium coated copper plate in the current density of 200 A / sq m to 400 A / sq m while monitoring the acid concentration and Ag ion concentration and replenishing timely; and 3. washing the electrolyzed Ag powder after electrolysis for 23-25 hr in hot water, stoving and casting ingot. The technological process is simple and high in efficiency.
Description
technical field [0001] The invention relates to a silver electrolysis process. Background technique [0002] The existing silver electrolysis process usually just puts the silver powder into the electrolytic tank for electrolysis, and directly pulls out the silver powder after the electrolysis ends. This kind of process has the following problems: the use of a single electrolytic cell will cause uneven raw materials, and the resulting electrolyte is easily polluted and scrapped; and the electrolytic cell is designed according to the size of the production capacity, so that the electrolyte The backlog is fixed and cannot be adjusted according to the raw material conditions, thereby limiting production; in addition, because the existing process uses manual removal of the silver powder from the electrolytic cell, the labor intensity is high, the work efficiency is low, and it is not easy to remove the silver powder. Scoop clean. Contents of the invention [0003] In view of...
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IPC IPC(8): C25C1/20C25C5/02
Inventor 王安理范尚立赵金宁
Owner 灵宝金源桐辉精炼股份有限公司