SU413199A1 - - Google Patents

Description

The invention relates to the field of ferrous metallurgy, and more specifically to methods for the production of steel in old-fashioned units in a duplex process. There is a method of steel melting by a duplex process, including the smelting of semi-finished product iB to a metallurgical unit, a semi-product output in: co.vsh, ool casting1Product: in another steelmaking unit and fine-tuning the metal in it to a given composition. However, the processes necessary for sufficient refining of steel, such as desulfurization, are very long. In order to improve the quality of steel and industrial production of metallurgical aggregates, IB offers an IB ayluuproduct process with an ina carbon content of 0.3–0.6% higher than the average mark, to introduce a mixture of carbide and aluminum with aluminum in the amount of 3-6 iKir / t of steel and 0.2-0.4 kg / t steel. The processed carbndole calcium and aluminum semi-product can be returned for refinement to a metallurgical unit, from which OH has been drawn. In open-hearth furnaces of electric arc furnaces, the plaque mixes with a high carbon content and becomes low when its content is 0.3–0.6% of the specified carbon content. Smelting is forced into a cat, in which it is located or set in the course of production together with aluminum chips (Norosh1KO | M) in an amount of 0.2-0.4 1 kg / ton calcium calcium iKaip band in 8-15 MIM in an amount of 3-6 kg / ton . This results in a decrease in the sulfur content in the metal, with which it contributes to the additional deoxidation of its alumina. As a result, the coefficient of actuality of sulfur dissolved in liquid iron and the rate of desulfurization increase. It should be noted that the desulfurization process was transferred in this case to the aggregate, where the conditions of intermeasurement, which intensify diffusion processes, are most favorable. Then, the metal is poured into another or the same IB, where the further refining of the metal from non-metallic inclusions is carried out by known methods. The duplex process has become especially convenient when pl1Vka: the basic acid of the open-hearth furnace is no longer necessary. When steel is put in the proposed method, the sulfur content reaches O, OH-0.013%, and the degree of desulfurization - 35-47%. The subject matter of the invention 1. Method of steel production by a duplex process involving the production of a semi-product in the metallurgy: G1I1ChS | Kam aggregate, the production of a batch in a ladle, the filling of a batch in a different steel-smelting unit, and fine-tuning in it the metal of the gall to the set composition, characterized in that increase the aqecTiBa of steel and the productivity of metallurgical aripeiraTOB, the intermediate product is compressed with 1M carbon and 0.3-0.6% higher than the average of 5% and the IB-process of release into the melt, a mixture of calcium carbide with aluminum is added to the coal the number of co Ino 3-6 1 kg / t steel and 0.2-0.4 kg / t steel. 2. The way is in. 1, from l and h and y and i, so that the carbide-treated “alci and alyumipium semi-finished product is returned to the metal airperaT, from which o, was released.