Highly effective metallurgical complexing agent for convertor (electric oven) and its preparation method and uses

Abstract

The invention relates to an admixture removing foreign matter of converting process in the field of fusion alloy treatment. It is formed by (by weight ratio) manganese oxide powdered ore 40-50%, iron powdered ore20-25%, dolomitic limestone powder 10-20%, silicon powder 4-6%, carbon powder 3-5%, catalyst 4-6% and some water; the complex agent is made by preparing for the material, stirring, adding catalyst and water to mix them, extrusion molding drying and sieving and so on.

Description

technical field [0001] The invention belongs to the treatment of molten alloys, and in particular relates to the addition of treatment agents for converter steelmaking to remove impurities. Background technique [0002] As we all know, the main task of steelmaking is to reduce or increase the content of carbon and other elements in pig iron to the specified range according to the needs of the steelmaking type. Sulfur S and phosphorus P elements in molten iron are generally harmful to steel and must be removed as much as possible during steelmaking. For this reason, it is necessary to add slag-promoting and slag-forming materials to the steelmaking furnace. In prior art, fluorite CaF 2 The effect of slag melting is good, but it is limited to environmental protection, and its use is prohibited; now limestone, iron oxide scale, iron ore, steelmaking sludge pellets and other materials are mostly used, and its defects are slow slag melting speed, poor melting of slag, and poor ...

AI Technical Summary

Problems solved by technology

In prior art, fluorite CaF 2 The effect of slag melting is good, but it is limited to environmental protection, and its use is prohibited; now limestone, iron oxide scale, iron ore, steelmaking sludge pellets and other materials are mostly used, and its defects are slow slag melting speed, poor melting of slag, and poor fluidity. Most of the furnaces have "drying back", or due to the adjustment of the gun position to increase the FeO content in the slag, and improper operation, resulting in splashing, the desulfurization S and dephosphorization P effects are poor, especially for smelting high-quality steel types, which cannot meet the requirements of desulfurization S and dephosphorization. Phosphorus P requirements

As a result, the blowing time is prolonged, the production efficiency is low, the blowing loss is high, the furnace material consumption and oxygen lance consumption are high, the furnace lining is corroded seriously, the splashing deteriorates the production environment, and it is easy to bring unsafe factors

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