Desulfurizing agent for RH furnace

A desulfurizer and furnace technology, applied in the field of iron and steel smelting, can solve the problems of low CaO content, poor desulfurization effect, low basicity, etc., and achieve the effects of low TC content, low cost and high activity

Inactive Publication Date: 2017-03-15
HENAN XIBAO METALLURGICAL MATERIALS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of CaO in this patent is low, the alkalinity of the slag is low, and the desulfurization effect is poor, and the addition of SrO in this patent results in high cost

Method used

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  • Desulfurizing agent for RH furnace
  • Desulfurizing agent for RH furnace
  • Desulfurizing agent for RH furnace

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with some specific embodiments.

[0026] See Table 1 for the chemical composition and weight percentage of the desulfurizers for RH furnaces in Examples 1-8 of the present invention.

[0027] See Table 2 for the lime and its weight percentage of the desulfurizer for RH furnaces in Examples 1-8 of the present invention.

[0028] See Table 3 for the fluorite and its weight percentage of the desulfurizer for RH furnaces in Examples 1-8 of the present invention.

[0029] The preparation method of the limestone in Example 1-8 of the present invention includes the following steps: calcining the limestone with gas, then pulverizing it to 3-15mm, then heating to 110-130°C, then evenly spraying silicone oil on the surface of the limestone, and finally letting it cool to room temperature , that is.

[0030] The preparation method of the desulfurizer for RH furnace of the embodiment of the present invention 1-8...

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Abstract

The invention belongs to the technical field of steel smelting and particularly relates to a desulfurizing agent for an RH furnace. The desulfurizing agent comprises, by weight, 1-4.0% of SiO2, less than or equal to 2.0% of Al2O3, 57-70% of CaO, 25-35% of CaF2, less than or equal to 1.0% of FeO, less than or equal to 2.0% of MgO, less than or equal to 0.15% of TC and less than or equal to 0.03% of S. The desulfurizing agent is low in melting point, beneficial to smelting of molten steel in the RH furnace, less in use amount, remarkable in desulfurizing effect and low in cost.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a desulfurizer for an RH furnace. Background technique [0002] The RH furnace refining method is also called the vacuum cycle degassing method. Its basic process principle is to use air bubbles to continuously lift molten steel into a vacuum chamber for degassing and decarburization reactions, and then return it to the ladle. Therefore, RH processing does not require a specific ladle clearance height, and the reaction speed is not limited by the ladle clearance height. The advantages of RH technology: fast reaction speed, short processing cycle, high production efficiency, often used in conjunction with converters. In order to produce ultra-low sulfur steel, the RH furnace refining method is now used. RH vacuum cycle degassing is a molten steel refining equipment between steelmaking and continuous casting. Its function is to improve the quality of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
CPCC21C7/0645
Inventor 李伟锋李书成朱雪峰张振宋志刚
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP
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