Process for electrostatic dressing and/or working up of salt and mineral mixtures |
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| 申请号 | US35371873 | 申请日 | 1973-04-23 | 公开(公告)号 | US3802556A | 公开(公告)日 | 1974-04-09 |
| 申请人 | WINTERSHALL AG; | 发明人 | FRICKE G; SINGEWALD A; | ||||
| 摘要 | Process in which raw or crude salt and mineral mixture are intensively mixed with an aliphatic, unbranched fatty acid having a chain length of three to 18 carbon atoms or with an aromatic carboxylic acid or with mixtures of said aliphatic and aromatic acids and an ammonium salt of a lower aliphatic acid, and thereafter treated with air having a relative humidity of 5 to 40 percent in an electrostatic separation zone at a temperature of about 15* to about 40* C. | ||||||
| 权利要求 | 2. Process according to claim 1 wherein said aliphatic, unbranched fatty acid contains five to 12 carbon atoms. 3. Process according to claim 1 wherein said ammonium salt is a member selected from the group consisting of ammonium acetate and ammonium formiate. 4. Process according to claim 1 wherein said air has a relative humidity of 10 to 30 percent. 5. Process according to claim 1 wherein said ammonium salt is used in an amount of about 50 to about 200 g/ton of starting salt or mineral mixture. 6. Process according to claim 1 wherein said salt or mineral mixture is the crude salt mixture derived in the recovery of potassium. 7. Process according to claim 6 which comprises separating a kieserite concentrate from said crude salt mixture and thereafter recovering a Sylvanite concentrate from the remaining residue. |
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| 说明书全文 | |||||||
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