发明名称 |
Production of concentrated carbonate suspensions |
摘要 |
A method of producing a rheologically stable concentrated aqueous suspension of a particulate alkaline earth metal carbonate which method comprises the following steps: (a) preparing a dilute aqueous suspension of the carbonate having a solids content of not more than 40% by weight; (b) dewatering the dilute aqueous suspension to form a carbonate suspension having a solids content in the range of from 45% to 65% by weight; (c) optionally mixing with the dewatered suspension formed in step (b) a dispersing agent for the carbonate to form a fluid suspension; (d) further dewatering the fluid suspension formed in step (b) by thermal evaporation under reduced pressure to raise the solids content of the suspension by a further differential amount of at least 5% by weight; and (e) after at least some of the dewatering in step (c) treating the suspension by a mechanical working process in which at least 1 kW.hr per tonne of carbonate on a dry weight basis is dissipated to refluidise the suspension. |
申请公布号 |
AU1869000(A) |
申请公布日期 |
2000.07.31 |
申请号 |
AU20000018690 |
申请日期 |
1999.12.23 |
申请人 |
IMERYS MINERALS LTD. |
发明人 |
MARK DANIEL MORTIMER;JOHN ANTHONY PURDEY;DEBORAH SUSAN THRALE;DAVID ROBERT SKUSE |
分类号 |
B01F3/12;B01F3/20;C01F11/18 |
主分类号 |
B01F3/12 |
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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