发明名称 |
Method for preparing mineral pigments, the thus obtained mineral pigments and installation for implementing such method. |
摘要 |
PCT No. PCT/FR96/01202 Sec. 371 Date May 27, 1998 Sec. 102(e) Date May 27, 1998 PCT Filed Jul. 30, 1996 PCT Pub. No. WO97/06215 PCT Pub. Date Feb. 20, 1997A method for preparing inorganic pigments from steel mill dust, particularly electric steel mill dust, wherein (a) the dust is separated into a magnetic fraction and a non-magnetic fraction; (b) the non-magnetic fraction is subjected to a basic leaching reaction; (c) the resulting solid batch is rinsed until neutralized and then separated; (d) the resulting batch is calcined at 450-650 DEG C.; (e) the calcined batch is treated with sulfuric acid in the presence of a catalyst; (f) the inorganic pigments are recovered; and (g) the solutions from (c) and (e) are used to precipitate other pigments. |
申请公布号 |
ZA9606474(B) |
申请公布日期 |
1997.02.19 |
申请号 |
ZA19960006474 |
申请日期 |
1996.07.30 |
申请人 |
WHEELABRATOR ALLEVARD;RECUPYL S.A. |
发明人 |
FAROUK TEDJAR;GILLES ROUX |
分类号 |
C01G49/00;C09C1/00;C09C3/00;C09D5/08;C09D7/12;C09D201/00;C22B3/44;C22B7/00;C22B7/02;C22B19/30 |
主分类号 |
C01G49/00 |
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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