Method for preparing advanced tin by electrolyzing high-stibium crude-tin alloy in hydrochloric acid system
A technology of coarse tin and alloy, applied in the direction of photography technology, instruments, photography auxiliary technology, etc., can solve the problems that have not been seen before, and achieve the effect of less equipment investment cost, less equipment variety, and low production and operation cost.
Inactive Publication Date: 2011-01-05
广西冶金研究院有限公司
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However, there is no report on the smelting process of preparing high-grade tin by electrolysis of high-antimony crude tin alloy in the SnCl2-HCl system
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The invention provides a method for preparing advanced tin by electrolyzing a high-stibium crude-tin alloy in a hydrochloric acid system. The raw material high-stibium crude-tin alloy comprises the following ingredients by mass: 86-97% of Sn, 2-13% of Sb, 0.5-1.2% of Cu, 0.01-1% of Pb and the balance of impurities. The high-stibium crude-tin alloy is cast as an anode and carries out electrolysis at room temperature in an electrolyte containing 30-80g / L of Sn<2+> and 40-100g / L of HCl and an SnCl2-HCl system with the current density of 80-180A / m<2>, thus generating a cathode tin which contains 99.99% of tin and reaching the national quality standard GB / T728-1998 on advanced tin.
Description
Method for preparing high-grade tin by electrolyzing high antimony crude tin alloy in hydrochloric acid system 1. Technical Field The invention relates to an alloy separation and purification method, in particular to a method for preparing high-grade tin by electrolyzing a high antimony crude tin alloy in a hydrochloric acid system. 2. Background technology At present, the separation methods of high antimony crude tin alloy mainly include: First, the high antimony crude tin alloy containing 92-95% Sn, Sb3.3-6.2%, Pb, Cu0.7-1.7% is mixed with SnSiF6-H2SiF6-PbSiF6 The electrolyte is electrolyzed to obtain a tin product with a purity of 96.34%. Chinese Patent Publication CN1150182A discloses a method of directly electrolyzing low-quality crude tin containing Sn>80%, Pb<8%, Fe<5%, and As<2% as raw materials. The steps are After granulation, it is packed into an acid-resistant cloth bag with a conductive plate inside and a plastic frame outside to form a combined anode...
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IPC IPC(8): C25C1/14
Inventor 覃用宁黄进文刘晨李浩铭何航军黄瀚陈克勤伍耀明陆焕良黎宏鹏范庆丰
Owner 广西冶金研究院有限公司