Method of reducing iron consumption for semi-steel smelting

Abstract

The invention discloses a method of reducing iron consumption for semi-steel smelting. The method comprises the following steps that (1), a semi-steel ladle which has completed vanadium extracting tosemi-steel smelting for one-cycle production period is placed on a semi-steel vehicle; (2), a waste steel bar is added into the semi-steel ladle; (3), semi-steel in a vanadium extraction converter isadded into the semi-steel ladle in the step (2); and (4), the substance of the semi-steel ladle in the step (3) is poured into a semi-steel furnace for smelting. According to the method, the process of an original production technology is not changed, the original production mode is not affected, equipment does not need to be added, only at the production interval time, the waste steel bar is preheated by utilizing the surplus temperature of the semi-steel ladle, and then the waste steel bar is melted by utilizing the impact force of the semi-steel and the high temperature. Through the summaryby an inventor on production and practice, the semi-steel smelting method provided by the invention is adopted, every semi-steel furnace can use extra about 0. 7 tons of waste steel compared with before and produce about 7 kilotons of steel per year, and basing on 4300 Yuan/ton to calculate, the economic benefit can be increased by 30,000,000 Yuan/year.

Description

technical field [0001] The invention relates to a method for reducing iron consumption in semi-steel smelting, belonging to the technical field of metallurgy. Background technique [0002] my country's vanadium-titanium magnetite deposits are widely distributed and rich in reserves. The reserves and mining volume rank third in the country's iron ore. Vanadium-titanium magnetite is not only an important source of iron, but also associated vanadium, titanium, chromium, cobalt, nickel, and platinum. And scandium and other components, with high comprehensive utilization value. Fe, V, and Ti in vanadium-titanium magnetite exist and distribute in the form of isomorphism, which cannot be enriched and separated by physical separation. Generally, it is necessary to produce vanadium slag by molten iron blowing vanadium. That is, the vanadium-titanium magnetite ore dressing concentrate is smelted in a blast furnace or an electric furnace to obtain vanadium-containing pig iron water, an...

AI Technical Summary

Problems solved by technology

Compared with conventional molten iron, semi-steel has greater burning loss of heating elements carbon, silicon and manganese, and greater loss of chemical heat in converter smelting

It has brought certain difficulties to the temperature rise of converter smelting, slag removal, and eating more scrap steel

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