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US 4,395,282 AGranted
Desulfurization mixture and process for making it
AssigneeHoechst Aktiengesellschaft
InventorsAlbert Braun, Willi Portz, Georg Strauss, Hans-Martin Delhey
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Abstract
The disclosure provides mixtures for the desulfurization of metal melts, especially steel and crude iron melts, based on CaC.sub.2 --CaO-crystal blends produced in the fused mass. More specifically, the mixtures contain free carbon and carbonate and have a portion of the CaO in the CaC.sub.2 --CaO-crystal blend hydrated to Ca(OH).sub.2. The disclosure also relates to a process for making the mixtures.
Claims9
A mixture for the desulfurization of steel and crude iron melts comprising
- (a) a CaC.sub.2 /CaO-crystalline blend containing 40 to 80 weight % CaO and having crystallized out of a fused mass of CaO and CaC.sub.2,
- (b) 1 to 6 weight % of chemically combined water having hydrated CaO in the CaC.sub.2 /CaO-crystalline blend to form Ca(OH).sub.2 ;
- (c) 0.5 to 8 weight % free carbon;
- and
- (d) 0.5 to 20 weight % carbonates of a substance selected from calcium, magnesium and sodium.
2 more elements
Dependencies are inferred from the claim text.