发明名称 |
Meetod metalli voi metalliühendi tootmiseks fluoriidimisprotsessi abil ja reguleeritud komponentidega tooraine selle meetodi jaoks |
摘要 |
An object of the present invention is to provide a method for preventing concentration of a radioactive substance in a generated extraction residue in a method of producing tantalum, niobium, or a similar substance including collecting and refining a raw material containing the substances through a fluoridation process by use of a hydrofluoric acid-containing solution. The object can be attained by employing an ingredient-regulated raw material prepared from an ore or a concentrate and, as an additive, a substance insoluble to hydrofluoric acid or a mixed acid containing hydrofluoric acid as an essential component; or by increasing the amount of the extraction residue through addition of the insoluble substance to a solvent during the fluoridation process, to thereby reduce the relative radioactive substance content to an arbitrary value. |
申请公布号 |
EE200100310(A) |
申请公布日期 |
2003.04.15 |
申请号 |
EE20010000310 |
申请日期 |
2000.12.18 |
申请人 |
MITSUI MINING & SMELTING CO., LTD. |
发明人 |
YOSHIO SOHAMA;HIROMICHI ISAKA;HIROYUKI WATANABE |
分类号 |
C22B3/00;C22B3/10;C22B3/24;C22B3/26;C22B34/24;C22B60/02 |
主分类号 |
C22B3/00 |
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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