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Procedure for the production of a steel melt containing carbide forming substances from iron-based raw materials and a mineral containing the carbide forming substance, an alloy mixture and the use of a mineral containing carbide forming substances for the alloying of a steel melt
Procedure for the production of a steel melt containing carbide forming substances from iron-based raw materials and a mineral containing the carbide forming substance, an alloy mixture and the use of a mineral containing carbide forming substances for the alloying of a steel melt
It has been proposed that a carbide-forming substance in the form of a mineral, e.g. molybdenum, MO, be used to avoid the high costs of ferrocarbide substances such as: alloy additives in the melting of iron-based raw material s into steel, but one drawback has been the high vapour pressure causing the vapour vapour formation of the carbide, e.g. MO. These problems are solved by a process for producing a steel melt from iron raw material and a carbide-forming element;including the steps to: (a) charge a melting furnace with iron-based raw materials; (b) charge the melting furnace with a quantity of an alloy mixture containing a particle-shaped mineral containing a carbide-forming substance and carbon, and in addition, the filament shell and/or CaO or other impactor containing CaO, preferably encased in a closed container; preferably placed in the middle of the melting furnace, (c) heat the inside of the melting furnace to a temperature of 700 K;(d) regulate the energy supply to the melting furnace so as to increase the temperature to 900-K over a period of time appropriate to the amount of alloy mixture and i t s particle size, thereby forming a ferro-alloy containing the carbide forming the alloy mixture; (e) melt the batch in order to produce a steel containing a large quantity of the charged carbide-forming substance.The inventive process reduces the economic and environmental impact by minimising losses of carbide-forming substances to the exhaust and slag.
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