| 发明名称 |
Cement expansion agent - based on calcia,alumina,sulphate and fluoride fused in a resistance furnace |
| 摘要 |
<p>A mixture of bauxite, gypsum and cryolite to give a CaO/Al2O3 ratio of 0.5-20 and a CaSO4 content of 30-80 wt.% and a fluoride content of 0.2-20 wt.% is melted in 20-400 v. A.C. resistance oven with a current density of 0.8-8.0 amp/cm2. The melt is either allowed to cool insulated or cooled by water spray or air jets.</p> |
| 申请公布号 |
FR2133213(A5) |
申请公布日期 |
1972.11.24 |
| 申请号 |
FR19710012974 |
申请日期 |
1971.04.13 |
| 申请人 |
DENKI KAGAKU KOGYO KK |
发明人 |
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| 分类号 |
C04B7/00;(IPC1-7):04B21/00;04B11/00 |
主分类号 |
C04B7/00 |
| 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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