High-temperature electrolytic in-situ desulfurization method based on magnesite desulfurizer

Abstract

The invention relates to a high-temperature electrolytic in-situ desulfurization method of a magnesite-based desulfurizer. The steps include: preparing a magnesite-based desulfurizer, grinding, drying and mixing; selecting molten iron as raw material for blast furnace pig iron; and selecting a magnesite-based desulfurizer of Magnesium fluoride, calcium fluoride, sodium fluoride, and magnesium oxide are fully ground and mixed with pig iron according to a certain ratio to obtain a mixed material; open the high-temperature resistance furnace program control device, and add the mixed material into the high-temperature resistance furnace for heating , until it is completely melted; the electrolysis system is installed to desulfurize the molten iron; the sulfur content of each sample is analyzed by experimental method, and the desulfurization efficiency is calculated. The present invention uses magnesium oxide with wide resources and low cost to replace magnesium powder, and performs desulfurization in molten iron pretreatment by electrolysis, while achieving the desulfurization effect and making full use of low-priced ores; the present invention is simple in operation, highly efficient and environment-friendly.

Description

technical field [0001] The invention relates to a method for pretreatment and desulfurization of molten iron, in particular to a high-temperature electrolytic in-situ desulfurization method for a magnesite-based desulfurizer. Background technique [0002] As a common method in the metallurgical industry, hot metal pretreatment desulfurization technology is favored by the majority of iron and steel enterprises. Compared with other desulfurization methods, it has obvious advantages. Firstly, the reaction between magnesium and sulfur is an exothermic reaction that can provide heat for the desulfurization reaction; secondly, the magnesium sulfide produced by the desulfurization reaction has excellent stability and is not prone to sulfur reversion; thirdly, its reaction speed is fast, and the slag produced by the desulfurization reaction Small quantity. Therefore, magnesium is often used as a desulfurization agent in the desulfurization process of molten iron pretreatment. [0...

AI Technical Summary

Problems solved by technology

The disadvantages in the process of electrolytic preparation of magnesium are also obvious: the production process requires high temperature and is highly corrosive to equipment; at the end of the production process, a large number of industrial wastes are discharged, which seriously pollutes the surrounding environment and increases the cost of environmental treatment and maintenance. cost

Magnesium metal is an active alkali metal. The safety problems derived from the activity of magnesium have brought restrictions on use, transportation and storage, and the utilization rate of magnesium in the process of magnesium-based desulfurization needs to be improved.

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