Converter or electric furnace steel-making slagging agent and preparation process thereof

Abstract

The invention relates to a steel-making slagging agent, in particular to a converter or electric furnace steel-making slagging agent produced by taking steel slag and magnesium slag as raw materials and blending an additive and a preparation process thereof. The slagging agent comprises the following chemical components in percentage by weight: at least 50 percent of CaO, at least 6 percent of MgO, at least 9 percent of TFe, at most 0.15 percent of S and at most 20 percent of SiO2. The preparation process for the slagging agent comprises the following steps of: material preparation according to the chemical component requirement, material mixing, wetting treatment, die-casting molding and aging reaction. The process solves the problem of the treatment of waste steel slag and metal magnesium slag; the components of the steel slag are basically similar to the components of the steel slag controlled in the steel-making process, so the steel-making slagging time and the slag adjusting time can be shortened; the FeO content of the slagging agent is basically consistent with the FeO content of the actual steel slag, so metal oxidation of molten steel is reduced; the slagging agent contains a certain amount of MgO which has certain assisting effect of protecting the furnace; and because fluorite is added, the corrosion of a furnace lining is reduced, and the service life of the furnace lining is greatly prolonged.

Description

technical field [0001] The invention relates to a steelmaking slagging agent, in particular to a steelmaking slagging agent for converters and electric furnaces produced by mixing steel slag and magnesium slag as raw materials with additives and a preparation process thereof. Background technique [0002] There are many kinds of raw and auxiliary materials for slag making. In production, people usually use materials such as lime, light-burned dolomite, iron oxide scale, fluorite and light-burned magnesium balls as slagging agents. Using lime and fluorite to make slag is easy to produce steel slag "drying" phenomenon during the blowing process, which prolongs the slag making time; at the same time, producing the above slag making materials (except iron oxide scale) will consume a lot of energy and have a negative impact on the environment. Lots of pollution. Contents of the invention [0003] The present invention aims to solve the above-mentioned defects and deficiencies ...

AI Technical Summary

Problems solved by technology

Using lime and fluorite to make slag is easy to produce steel slag "drying" phenomenon during the blowing process, which prolongs the slag making time; at the same time, producing the above slag making materials (except iron oxide scale) will consume a lot of energy and have a negative impact on the environment. a lot of pollution

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