Compound desulfurizing agent for melted iron blowing desulfurization and preparation method for compound desulfurizing agent

Abstract

The invention discloses a compound desulfurizing agent for melted iron blowing desulfurization and a preparation method for the compound desulfurizing agent. The technical problems of the low utilizing ratio of a magnesium powder desulfurizing agent for melted iron blowing desulfurization and high cost of melted iron desulfurization in the prior art are mainly solved. According to the technical scheme, the compound desulfurizing agent for melted iron blowing desulfurization comprises, by weight, 80%-90% of passivation magnesium powder, 1%-8% of metallic aluminum, 2%-10% of aluminum oxide, and the balance unavoidable impurities. According to the compound desulfurizing agent for melted iron blowing desulfurization, the utilizing ratio of the passivation magnesium powder is increased by 5% or above averagely, and the cost of melted iron desulfurization is reduced; aluminum composition in the raw material of the compound desulfurizing agent for melted iron blowing desulfurization adopts the metallic aluminum and the aluminum oxide in industrial aluminum ash, production cost of the compound desulfurizing agent is significantly reduced, meanwhile, wasted materials like the industrial aluminum ash is used again, and green operation is achieved.

Description

technical field [0001] The invention relates to a desulfurizer for molten iron desulfurization, in particular to a composite desulfurizer for molten iron injection desulfurization and a preparation method thereof, belonging to the technical field of iron and steel metallurgical auxiliary materials. Background technique [0002] Normally, sulfur is a harmful element in steel, which can cause hot embrittlement of steel. Different steel products have different requirements for sulfur content due to different uses and processing methods, but when the sulfur content exceeds the standard, desulfurization must be carried out. In steelmaking production, desulfurization methods are divided into molten iron desulfurization, smelting desulfurization and refining desulfurization. Desulfurization of molten iron can reduce the burden of smelting desulfurization and refining desulfurization, and desulfurization as soon as possible can remove desulfurization products from steel products as...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a composite desulfurizer for molten iron injection desulfurization and its preparation method, which mainly solves the technical problems of low utilization rate of magnesium powder desulfurizer for molten iron injection desulfurization and high cost of molten iron desulfurization in the prior art