| 发明名称 |
UPGRADING THE TANTALUM AND COLUMBIUM CONTENTS OF OXIDIC METALLURGICAL PRODUCTS |
| 摘要 |
The mineral acid leaching of a tin slag or other metallurgical product containing tantalum and columbium oxides as well as a significant amount of silica is improved, with resulting increase in the total content of tantalum and columbium oxides in the leached product obtained by filtration, by adding a controlled amount of hydrofluoric acid prior to the filtration.
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| 申请公布号 |
US3658511(A) |
申请公布日期 |
1972.04.25 |
| 申请号 |
USD3658511 |
申请日期 |
1969.12.22 |
| 申请人 |
KAWECKI BERYLCO INDUSTRIES INC. |
发明人 |
ROBERT A. GUSTISON |
| 分类号 |
C22B34/20;C01G33/00;C01G35/00;C22B3/00;C22B3/04;C22B34/24;(IPC1-7):C22B51/00 |
主分类号 |
C22B34/20 |
| 代理机构 |
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代理人 |
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| 地址 |
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