A method for dephosphorizing converter slag splashing

A dephosphorization converter and slag splashing technology, applied in the direction of manufacturing converters, etc., can solve the problems of heat loss, long slag splashing time, affecting the smelting cycle, etc., and achieve the effect of rapid cooling and thickening, and shortening the slag splashing time.

Active Publication Date: 2019-03-05
SHOUGANG JINGTANG IRON & STEEL CO LTD
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AI Technical Summary

Problems solved by technology

However, the existing slag splashing method takes a long time to splash slag, which affects the smelting cycle and causes heat loss

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0017] The embodiment of the present invention provides a method for slag splashing in a dephosphorization converter, which is used to enhance the cooling effect of slag splashing and shorten the slag splashing time.

[0018] In order to solve the above technical problems, the general idea of ​​the technical solution provided by the present invention is as follows:

[0019] In the technical solution of the embodiment of the present invention, on the one hand, cold solidified pellets at normal temperature are added to the dephosphorization converter. Since the temperature of the cold solidified pellets is much lower than the temperature of the hot slag in the dephosphorization The pellets exchange heat with the hot slag, absorb the heat of the hot slag, and then cool the hot slag. On the other hand, high-speed nitrogen is still blown into the dephosphorization converter. Therefore, under the joint cooling effect of high-speed nitrogen and cold solidified pellets, the hot slag ...

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Abstract

The embodiment of the invention provides a dephosphorization converter slag splashing method used for enhancing splashed slag cooling effect and shortening slag splashing time. The method comprises the steps of adding cold bond pellets at normal temperature into a dephosphorization converter to exchange heat with thermal slag in the same, and thus cooling the thermal slag; and blowing high-speed nitrogen into the dephosphorization converter, splashing the slag via the cooling effect of the cold bond pellets and the high-speed nitrogen, and thus cooling and densifying the thermal slag.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a method for splashing slag in a dephosphorization converter. Background technique [0002] In the dephosphorization converter, the liquid slag and the molten iron have a large contact area, and the carbon in the molten iron and the iron oxide FeO in the steel slag can undergo intense carbon-oxygen reactions. Failure to cure quickly will result in converter splatter. The existing slag splashing method uses an oxygen lance to blow in a large amount of nitrogen to cool the slag splash. However, the existing slag splashing method takes a long time to splash slag, which affects the smelting cycle and also causes heat loss. Contents of the invention [0003] The embodiment of the present invention provides a method for slag splashing in a dephosphorization converter, which is used to enhance the cooling effect of slag splashing and shorten the slag splashing time. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36
CPCC21C5/36
Inventor 刘延强罗磊董文亮关顺宽张丙龙袁天祥李金柱赵长亮培裴张新国白艳江梅宁安泽秋王皓
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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