发明名称 |
Desulphurising of molten metals, esp. crude iron or steel - using mixed crystals of calcium carbide and calcium oxide which is partly hydrated |
摘要 |
<p>Agent is made by a melting process, which produces mixed crystals (I) contg. CaC2 and CaO; and part of the CaO is hydrated to form Ca(OH)2. Crystals (I) pref. contain by wt. 40-80% CaO, esp. either 45-80%, or 40-65% CaO; and the CaO is pref. hydrated so that crystals (I) contain 1-6%, esp. 2.5-3.5% combined water. Crystals (I) are pref. made by the usual process employed to mfr. CaC2, and are then pre-crushed and the fines below 4 mm in size discarded. The remainder is milled in the presence of air or N2 contg. 5-20 g/cu.m moisture to a size below 10 mm. The agent can be mfd. economically, and has a high yield when removing sulphur from crude iron or steel.</p> |
申请公布号 |
DE2952761(A1) |
申请公布日期 |
1982.01.28 |
申请号 |
DE19792952761 |
申请日期 |
1979.12.29 |
申请人 |
HOECHST AG |
发明人 |
BRAUN,ALBERT;PORTZ,WILLI,DIPL.-CHEM.DR.;STRAUSS,GEORG,DIPL.-CHEM.DR.;DELHEY,HANS-MARTIN,DIPL.-ING. |
分类号 |
C21C1/02;C21C7/064;C21C7/076;(IPC1-7):21C1/02 |
主分类号 |
C21C1/02 |
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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