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 ineffective reduction of smelting cost, high price, unfavorable environmental protection, etc. effect of the problem

Inactive Publication Date: 2006-11-08
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 a variety of deoxidizing alloys and refining agent base materials. The deoxidizing alloy is composed of Ca, Si, Ba, Al, and C; the proportions of the deoxidizing alloy are as follows: Ca8-18%, Si35-45% , Ba7~17%, Al10~25%, C15~35%; refining agent base material consists of the following materials, CaO, AL 2 O 3 , SiO 2 , MgO, the ratio of each component is as follows: CaO50~65%, Al 2 O 3 30~45%, SiO 2 2~6%, MgO5~10%. The ratio of deoxidizing alloy to refining agent base material is as follows, deoxidizing alloy: refining agent base material is 0.75-3:1, and the weight ratio of deoxidizing alloy is generally 40-80%.

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

[0016] Deoxidizing alloy: broken, grain size 1~5mm.

[0017] Refining agent base material: pre-melted, broken. The particle size is 1~5mm.

[0018] Finished product: Deoxidizing a...

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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 of the metallurgical industry, in particular to a molten steel composite refining agent used as a pre-deoxidizer or top slag modifier added to a ladle during steel tapping. Background technique [0002] With the increase in 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 invented molten steel composite refining agent is a new type of metallurgical auxiliary material that integrates the refining functions of molten steel, steel slag deoxidation, and adsorption of inclusions. It is added into the ladle when steel is tapped, which can play the role of alloy deoxidation. Adding to the slag surface of the ladle can deoxidize and modify the slag of the converter and electric furnace, and effectively change a series of q...

Claims

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Application Information

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