发明名称 |
PROCESS FOR THE PREPARATION OF CALCIUM ALUMINATES FROM ALUMINUM DROSS RESIDUES |
摘要 |
<p>The present invention is concerned with a process for the preparation of sintered calcium aluminates that can generally be used as a protective cover for liquid metals, and particularly steel, and the process comprising the steps of mixing calcium oxide, or its precursor, particles and aluminum dross residue, such as NOVAL TM ; calcining the resulting mixture; maintaining a calcining temperature of 1200 DEG C. or higher for approximately 5 minutes or more which is sufficient to form a friable sintered product rich in calcium aluminates; and recovering the sintered product after cooling. Optionally, calcium fluoride, or other fluoride can be added to the starting mixture, if it is not already contained in the dross residue.</p> |
申请公布号 |
EP0720592(B1) |
申请公布日期 |
1998.12.02 |
申请号 |
EP19940926751 |
申请日期 |
1994.09.19 |
申请人 |
ALCAN INTERNATIONAL LIMITED;31025273 QUEBEC INC. |
发明人 |
HUARD, YVAN;MATHIEU, GILLES;BREAULT, RAYMOND;TREMBLAY, SYLVAIN, PAUL |
分类号 |
C04B35/44;C21C7/064;(IPC1-7):C04B35/44 |
主分类号 |
C04B35/44 |
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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