RH cold steel removing method

A technology of cold steel and top gun, applied in the field of RH removal of cold steel, can solve the problems of potential safety hazards, inability to be completely enclosed, and short-term confined space, etc., to improve safety, avoid loud explosions and explosions, and shorten the effect of time
CN104775007AInactive Publication Date: 2015-07-15BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2015-07-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a RH cold steel removing method, and belongs to the field of external refining RH zone cold steel removing technology. The RH cold steel removing method is used for solving problems that conventional methods are long in cold steel removing time, and are unsafe. The RH cold steel removing method comprises following steps: operation preparation, wherein RH top lance is arranged at the top part of a RH furnace vacuum groove, the positions of the RH top lance can be adjusted, the RH top lance is connected with a device used for providing pure oxygen, and oxygen flow amount can be adjusted; and cold steel removing, wherein according to the different positions of cold steel in the vacuum groove, a plurality of spraying segments are set based on the positions of the RH top lance from high to low, pure oxygen flow is sprayed onto cold steel in the vacuum groove at each segment in sequence, pure oxygen flow amount and spraying time are adjusted at different segments, exothermic reaction of pure oxygen with ferric oxide in cold steel is realized, cold steel in the vacuum groove is removed via melting, and cold steel removing is completed after the last operation period. Top lance positions are set according to the height, the RH cold steel removing method is used for heat melting cold steel in different positions in the RH groove, cold steel removing efficiency is increased, cold steel removing time is shortened, and operation safety is increased because that pure oxygen contains no impurity.
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Description

technical field

[0001] The invention relates to the technology of removing chilled steel in the RH area of ​​refining outside the furnace, in particular to a method for removing chilled steel in the RH area. Background technique

[0002] Cold steel refers to the molten steel and steel slag splashed in the vacuum tank during the vacuum treatment of the RH furnace, which solidifies for a long time and accumulates to form steel and slag polymers.

[0003] The cold steel in the vacuum tank of the RH furnace will not only affect the vacuum degassing area, but also deteriorate the quality of the molten steel after refining in the RH furnace. Therefore, the cold steel in the vacuum tank of the RH furnace must be melted and removed, which is called RH decooling in the industry. steel.

[0004] The existing RH cold steel removal technology mainly uses RH-KTB oxygen gun to inject gas to the cold steel, supplemented by air (the ratio of gas to air is about 1:1), and uses the high calo...

Claims

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