Method for controlling excessive aluminum content in heavy rail steel with operation speed of 350 kilometer/hour and over

Method for controlling excessive aluminum content in heavy rail steel with operation speed of 350 kilometer/hour and over

The invention relates to a method for controlling the excessive aluminum content in heavy rail steel with production speed of 350 kilometer and over, which belongs to the steel-making field of metallurgy industrial production. According to the invention, the alkalinity of LF refining furnace slag is...

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Hauptverfasser: ZHAO DIANQING, LI FENG, LIU PING, ZHI JIANGUO, ZHANG XIAOGUANG, JING YINONG
Format: Patent
Sprache:chi ; eng
Schlagworte:
CHEMISTRY
METALLURGY
METALLURGY OF IRON
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL
TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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creator ZHAO DIANQING
LI FENG
LIU PING
ZHI JIANGUO
ZHANG XIAOGUANG
JING YINONG
description The invention relates to a method for controlling the excessive aluminum content in heavy rail steel with production speed of 350 kilometer and over, which belongs to the steel-making field of metallurgy industrial production. According to the invention, the alkalinity of LF refining furnace slag is controlled below 2.0; the mass percentage content of the original auxiliary material aluminum added in a converter and a LF refining furnace is Al
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According to the invention, the alkalinity of LF refining furnace slag is controlled below 2.0; the mass percentage content of the original auxiliary material aluminum added in a converter and a LF refining furnace is Al&lt;=1.5%; the mass percentage of Al2O3 in the LF refining furnace slag can be controlled in 0-15%. The invention is characterized in that the alkalinity of LF refining furnace slag is controlled, and enables a reaction of aluminum in steel and SiO2 in slag to produce Al2O3 to enter into slag, therefore, the aluminum content carried into molten steel by raw materials is corresponding minimized. In addition, Al2O3 carried by slag material is minimized as possible which is in favor of aluminum in the molten steel to enter into slag. 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subjects CHEMISTRY
METALLURGY
METALLURGY OF IRON
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL
TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
title Method for controlling excessive aluminum content in heavy rail steel with operation speed of 350 kilometer/hour and over
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