Smelting method for reducing inclusions in RH vacuum furnace channel washing water steel

By using a carbon-oxygen reaction under vacuum conditions in the LF refining furnace without adding an aluminum source, combined with light treatment and this treatment mode, the problems of alloy consumption and inclusion contamination in the molten steel of the RH vacuum furnace washing tank were solved, thereby improving the purity of the molten steel and shortening the smelting cycle.

CN122060968APending Publication Date: 2026-05-19LINYI IRON & STEEL INVESTMENT GRP SPECIAL STEEL CO LTD
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Patent Information

Application Number
CN202610223386.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-25
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

The existing RH vacuum furnace steel washing process suffers from problems such as high alloy cost, serious inclusion pollution, long smelting cycle, and high power consumption.

Method used

When smelting molten steel in the LF refining furnace, no aluminum source is added. A light treatment mode is used to eliminate residual oxygen in the vacuum chamber. Then, the process is switched to this treatment mode for carbon deoxidation. The vacuum level and circulating gas volume are controlled, and CO gas is generated by the reaction of carbon and oxygen to remove inclusions.

Benefits of technology

It reduces the use of aluminum products, lowers alloy costs, improves the purity of molten steel, shortens the smelting cycle, reduces power consumption and inclusion formation, and reduces the risk of continuous casting turbulence.

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Abstract

The invention discloses a smelting method for reducing inclusions in RH vacuum furnace channel washing water, and belongs to the technical field of smelting. When the LF refining furnace is used for smelting the channel washing water, an aluminum source is not added into the channel washing water, and only heating treatment is carried out; when the RH vacuum furnace starts tank washing treatment, the light treatment mode is started firstly, the treatment mode is switched to the treatment mode after residual oxygen in the vacuum chamber is eliminated, the RH vacuum furnace completes carbon deoxidation tank washing operation, and the inclusions in the RH vacuum furnace channel washing water are reduced. According to the method, inclusions generated by deoxidation of the aluminum product are reduced, the purity of molten steel is improved, DS inclusions are obviously reduced, and meanwhile the risk of continuous casting flocculation flow is reduced; the use of aluminum products is reduced, so that the alloy cost is effectively reduced. The secondary refining period of the LF refining furnace is shortened, the power consumption per ton of steel is reduced, the generation of aluminum oxide inclusions is reduced, and the lime consumption of the LF refining furnace is indirectly reduced.
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