Operation method for reducing iron loss of molten iron torpedo ladle

Abstract

The invention discloses an operation method for reducing the iron loss of a molten iron torpedo ladle. The operation method comprises the following steps of processing scrap steel into a crushed material by adopting a crushing mode, controlling the size to be within 100 mm*100 mm, controlling the bulk specific gravity of the crushed material to be more than 1.60 t / m<3>, transporting scrap steel toa molten iron torpedo ladle iron adding position bin, calculating the scrap steel adding amount meeting the steelmaking temperature requirement according to the tapping temperature of blast furnace molten iron, enabling the blast furnace molten iron temperature to range from 1400 DEG C to 1530 DEG C, the torpedo ladle tonnage to range from 420 t to 450 t, the scrap steel adding cooling range to range from 5 DEG C to 10 DEG C and the scrap steel adding amount control range to range from 7 kg / t to 18 kg / t, adding the scrap steel into the torpedo ladle through a rotating chute in the earlier stage of blast furnace iron adding, using the stirring effect of the molten iron in the later period of torpedo ladle iron mixing, and promoting melting of the scrap steel in the torpedo ladle. Accordingto the operation method, a chemical reaction generated by adding slag such as pellets and dolomite in the smelting process can be reduced, and the frequency of manual intervention in oxygen lance operation in the smelting process is reduced.

Description

Technical field [0001] The invention relates to an operation method for reducing iron consumption of a molten iron torpedo tank. Background technique [0002] At the current stage, iron and steel enterprises are mainly adopting methods such as increasing the volume of scrap hoppers, adding scrap steel in distribution, etc., and adding scrap steel to the furnace for smelting at one time. However, due to the production rhythm and other factors that do not allow the operation method of adding scrap steel twice, the actual amount of scrap steel added to the furnace becomes a restrictive link in reducing iron consumption. When the molten iron is still rich in heat, the slag coolant is basically used. Balance the heat balance in the furnace to prevent accidents such as splashing caused by excessive temperature in the furnace. The use of such coolants to balance the heat in the furnace not only causes an increase in production costs, but also increases the amount of slag in the furnace...

AI Technical Summary

Problems solved by technology

The use of such coolants to balance the heat in the furnace will not only increase the production cost, but also lead to an increase in the amount of slag in the furnace and an increase in the consumption of steel materials

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