SLAG COATING METHOD

Japanese Patent JP3845160

B2

PROBLEM TO BE SOLVED: To reduce the viscosity of slag and to give a good coating ability by charging a refractoriness improver after lowering the iron oxide to a specific value and lower with a slag oxidizing degree reduced agent when the iron oxide concn. in the remained slag in a converter is a specific value or higher.
SOLUTION: The refractoriness improver is charged into the slag remained in the converter after tapping a steel to increase the refractoriness with the slag and the slag is stuck to the lining refractory in the converter to restrain the damage of the lining refractory. At this time, in the case of being ≥15% iron oxide concn. of FeO, Fe2O3, etc., in the slag, firstly, the slag oxidizing degree reduced agent (coke, Al-containing compound, Mg-containing compound) is charged to reduce the iron oxide concn. to ≤15%. Successively, the refractoruness improver (raw dolomite, lime stone, converter slag) is charged to improve the refractoriness of the slag, and the slag is stuck to the lining refractory in the converter. By this method, the coating ability of the slag is improved and the worn quantity of the lining refractory in the converter is reduced and the service life of the converter body is extended.

JPS6032684	[Title of the Invention] A manufacturing method of refined steel
JPH0297637	HIGHLY OXIDIZABLE ALUMINUM ALLOY

Takeshi Matsui
Toshi Washisu

JP35394796A

November 15, 2006

December 19, 1996

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Nippon Steel Corporation

C21C5/36; C21C5/44; (IPC1-7): C21C5/36; C21C5/44

JP1132710A
JP1152214A
JP64004412A

Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nagasaka Tomoyasu
Yasuhiro Hagiwara

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