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Molten steel composite refining agent

A compound refining agent and refining agent technology, applied in the field of molten steel compound refining agent, can solve the problems of unfavorable environmental protection, inability to effectively reduce smelting costs, high price, etc., and achieve environmental protection and expansion, avoid quality problems, acid-soluble aluminum The effect of content increase

Inactive Publication Date: 2008-02-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, some refining agents contain quartz CaF 2 ingredients, not conducive to environmental protection
Some refining agents are relatively expensive and cannot effectively reduce the cost of smelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The molten steel composite refining agent of the present invention is composed of various deoxidizing alloys and refining agent base materials, the deoxidizing alloy is composed of Ca, Si, Ba, Al and C; the proportion of the deoxidizing alloy is as follows: Ca8-18%, Si35-45% , Ba7~17%, Al10~25%, C15~35%; the refining agent base material is composed of the following substances, CaO, Al 2 o 3 , SiO 2 and MgO, the ratio of each component is as follows: CaO50~65%, Al 2 o 3 30-45%, SiO 2 2-6%, MgO5-10%. The proportioning range of deoxidation alloy and refining agent base material is as follows, deoxidation alloy:refining agent base material is 0.75-3:1, and the weight ratio of deoxidation alloy is generally 40-80%.

[0015] The production technology of molten steel composite refining agent of the present invention:

[0016] Deoxidized alloy: broken, particle size 1-5mm.

[0017] Refining agent base material: pre-melting, crushing. Particle size 1 ~ 5mm.

[0018] Fin...

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Abstract

The composite molten steel refining agent consists of deoxidizing alloy and refining agent base material in the weight ratio of 0.75-3 to 1. The deoxidizing alloy consists of Ca 8-18%, Si 35-45%, Ba 7- 17%, Al 10-25% and C 15-35%; and the refining agent base material consists of CaO 50-65%, Al2O3 30-45%, SiO 6-22% and MgO 5-10%. The composite molten steel refining agent of the present invention may be used as the pre-deoxidizing agent or cinder pushing modifier, can avoid the formation of SiO2, AL2O3 and other high smelting point solid deoxidizing products, and is favorable to the formation of low smelting point composite compounds. The present invention has high deoxidizing effect, low deoxidizing cost, and no fluorine content resulting in environment friendship.

Description

technical field [0001] The invention relates to an auxiliary additive material used in the steelmaking process in the metallurgical industry, in particular to a molten steel composite refining agent added to a ladle during tapping as a pre-deoxidizer or top slag modifier. Background technique [0002] With the improvement of the quality requirements of molten steel, especially the widespread use of high-performance and high-quality steel, higher requirements are put forward for auxiliary materials in the steelmaking process. The molten steel composite refining agent of the invention is a new metallurgical auxiliary material integrating refining functions such as molten steel, steel slag deoxidation, and adsorption inclusions. It can be added to the ladle when tapping to deoxidize the alloy. Added on the surface of ladle slag, it can deoxidize and modify the slag of converter and electric furnace, and effectively change a series of quality problems caused by high oxidation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
Inventor 唐萍文光华李万绪
Owner CHONGQING UNIV
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