发明名称 |
Benefication of titania slag by oxidation and reduction treatment |
摘要 |
This invention relates to a method of treating titania slag to increase the leachability of impurities from the slag consisting of the steps of sizing the titania slag to a particle size from 75 to 850 mum; oxidizing the sized slag particles at a temperature from about 700° C. to below about 900° C. causing the iron present in the slag to concentrate at the exposed surfaces of the slag particles and/or causing an anatase phase to stabilize in the slag, causing a major portion of the iron in the Fe(II) state to convert to the Fe(III) state, and causing the titanium in the Ti(III) state to be converted to the Ti(IV) state; and reducing the oxidized slag in a reducing atmosphere from about 700° C. to about 950° C. to convert a major portion of the iron in the Fe(III) state to the Fe(II) state. The invention also relates to a method of beneficiating titania slag to increase the TiO2 content thereof wherein the above treated slag is leached with acid.
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申请公布号 |
US6803024(B1) |
申请公布日期 |
2004.10.12 |
申请号 |
US20010744531 |
申请日期 |
2001.06.15 |
申请人 |
IPCOR NV |
发明人 |
VAN DYK JACOBUS PHILIPPUS;VEGTER NANNE MATTHEUS;VISSER CORNELIA PETRONELLA;DE LANGE THOMAS;WINTER JOHN DAVID;WALPOLE ERNEST ALAN;NELL JOHANNES |
分类号 |
C01G23/047;C22B34/12;(IPC1-7):C01G23/00;C22B34/10 |
主分类号 |
C01G23/047 |
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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