发明名称 |
Process for treating alumina-bearing ores to recover metal values therefrom |
摘要 |
A method for processing alumina-bearing ores such as bauxite to recover iron, aluminum, silicon and titanium metal values therefrom the method comprising the steps of adding the alumina-bearing ores to a digester containing an acid to provide a mixture of acid and alumina-bearing ores and heating the mixture to dissolve soluble compounds of at least one of iron, aluminum, silicon and titanium to provide a digest containing dissolved salts of the soluble compounds and to provide a gas component. Thereafter, the digest is treated with water to dissolve water soluble salts therein to provide a slurry comprised of a liquid containing water and the dissolved soluble salts and a solid component comprised of silica. The solid component is separated from the liquid and the pH of the liquid is adjusted to form an aluminate and an iron-containing precipitate. The iron-containing precipitate is separated from the liquid to provide an iron-depleted liquid whose pH is adjusted to precipitate aluminum trihydrate which is separated from the iron-depleted liquid to provide an aluminum trihydrate-depleted liquid. The pH of the aluminum trihydrate-depleted liquid is adjusted to form a precipitate comprised of at least one remaining salt in the aluminum trihydrate-depleted liquid to provide a salt-depleted liquid. The salt precipitate is separated from the salt-depleted liquid thereby recovering the metal values from the alumina-bearing ores.
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申请公布号 |
US2001051121(A1) |
申请公布日期 |
2001.12.13 |
申请号 |
US20010847205 |
申请日期 |
2001.05.03 |
申请人 |
BARNETT ROBERT J.;MEZNER MICHAEL B. |
发明人 |
BARNETT ROBERT J.;MEZNER MICHAEL B. |
分类号 |
C01F7/26;C01G23/00;C01G23/04;C01G23/053;C01G49/00;C01G49/02;C22B3/06;C22B3/08;C22B3/44;C22B7/00;C22B21/00;C22B34/12;(IPC1-7):C22B21/00 |
主分类号 |
C01F7/26 |
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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