Method for recycling tin

A technology of tin plating and detinning, applied in the field of tin recycling, to achieve the effect of simple process, good labor conditions and less equipment

Inactive Publication Date: 2011-04-06
赖小洪
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is the use of toxic chlorine gas, strict safety measures, and better sealing of the reaction tank piping system and condenser to prevent leakage of chlorine gas and tin tetrachloride

Method used

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  • Method for recycling tin

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Embodiment Construction

[0015] The gist of the present invention is to repair the old and benefit the waste, and to contribute to the green economy by saving energy, reducing consumption and environmental protection through waste recycling that benefits the country and the people. For this reason, the invention provides a kind of method that reclaims tin, and the tin recovery solution that this method uses is made of solute Cu2 + 10~60g / l,H 2 SO 4 40~100g / l and solvent distilled water, the method steps are as follows:

[0016] (1) Put the tin-plated scrap copper into the leaching basket, which is welded with Gr18Ni9Ti stainless steel, and the surrounding is made of 40-60 mesh stainless steel mesh, which is convenient for the solution to drain, and the bottom is an openable bottom, which is convenient for unloading.

[0017] (2) Hang the loaded basket into the replacement tank for soaking and detinning. The solution in the replacement tank contains Cu10~60g / l, H 2 SO 4 50~100g / l, ...

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Abstract

The invention relates to a method for recycling tin. Used tin recycling solution consists of 10 to 60 g / L of Cu<2+> and 40 to 100 g / L of H2SO4 serving as solutes and distilled water serving as a solvent. The method comprises the following steps of: soaking a waste tin-plated copper material into a replacement tank which is filled with tin recycling solution for 5 to 30 minutes for removing tin and keeping the working temperature of the tin recycling solution between 50 and 90 DEG C; taking the copper material from which tin is removed out and standing; and putting the tin-containing tin recycling solution into an electrolytic tank for electrolyzing so as to obtain electrolytic tin. The method for recycling the tin has a simple process, a small amount of equipment, small investment, good labor condition, low energy consumption, low cost and high metal recycling rate and is suitable for recycling tin in waste tin-plated copper materials and waste tin-plated copper wires in the electronic industry; the investment on tin-plated waste material equipment with the annual throughput of 5,000 tons is only about more than 0.3 million; and the recycling rates of copper and tin are 99.9 percent and 96 percent respectively.

Description

technical field [0001] The invention relates to a process for recovering tin, in particular to a solution for recovering tin from industrial tinned copper waste and tinned copper wires and a tin recovery method. Background technique [0002] With the rapid development of electronic information industry, automobile industry, wire and cable industry. In the production process, tinning scraps and recyclable tinning scraps are increasing day by day. It is estimated that as much as 400,000 to 500,000 tons of this waste is produced annually. Tinned copper scrap generally contains 96.0-98.5% copper and 1.5-3.0% tin. Recycling copper and tin from such waste has considerable economic and social benefits. In the past, this kind of tin-plated copper scrap was not recycled in advance, but was treated as general copper scrap, which was added to a copper anode furnace, redox smelted and cast into an anode plate, and then electrolytically refined to produce cathode copper. During the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/08C25C1/14
CPCY02P10/20
Inventor 黄兴国
Owner 赖小洪
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