发明名称 |
Method for recovering metallic tin from electroplating sludge |
摘要 |
Improved recovery of tin from sludge formed during a halogen-type electrolytic tinplating of steel sheet comprises leaching the sludge with water at a pH of 7 or less, separating an iron-containing sludge remaining after the leaching, alkalifying the filtrate obtained in the first separation step to deposit tin-containing sludge, separating and recovering the tin-containing sludge deposited in the first alkalifying step, redissolving the tin-containing sludge in an alkaline solution, and electrolytic reduction of the alkaline solution. High purity metallic tin is recovered from sludge, at a high yield. Other materials are also recovered for reuse from the filtrate and precipitation, which are formed during the process, without pollution of the operational environment.
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申请公布号 |
US6110349(A) |
申请公布日期 |
2000.08.29 |
申请号 |
US19980170066 |
申请日期 |
1998.10.13 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
KAWAMURA, KATSUHITO;ISHIKAWA, FUYUHIKO;SAMBONCHIKU, KAZUMITSU;YUKI, KEI;KAWASHIMA, SHINJI;UKENA, TOSHIMICHI |
分类号 |
C25C1/14;C25D21/18;(IPC1-7):C25C1/14 |
主分类号 |
C25C1/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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