| 发明名称 |
FREMGANGSMAATE TIL AA FREMSTILLE EN TOERR SEMENTBLANDING |
| 摘要 |
<p>A ferrous sulphate hydrate product for use as chromate reducing agent for dry cement is made from a technical or commercial grade ferrous sulphate heptahydrate by one or more treatments selected from moderate drying, powder dilution, physical absorption, and chemical absorption. In particular, the technical grade ferrous sulphate heptahydrate is mixed with fly ash or gypsum and subjected to a moderate drying at temperatures in the range of 20-60<o>C.</p> |
| 申请公布号 |
NO842906(A) |
申请公布日期 |
1984.07.16 |
| 申请号 |
NO19840002906 |
申请日期 |
1984.07.16 |
| 申请人 |
AALBORG PORTLAND-CEMENT-FABRIK, AS, |
发明人 |
RASMUSSEN, POUL LEHN, |
| 分类号 |
C04B28/00;C04B7/00;C04B7/02;C04B7/48;C04B22/14;C04B28/02;(IPC1-7):04B/ |
主分类号 |
C04B28/00 |
| 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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