Smelting process and device of pure iron

Abstract

The invention relates to a smelting process and a device of pure iron, belonging to metallurgical industry steel-making raw material. The process comprises the following steps: mixing iron-containing raw materials with reducing agent, solvent and catalyst to prepare ultra fine powder, mixing to make pelletizing materials, sending the prepared pelletizing materials into a reducing furnace, obtaining metallic pellets after the reduction reaction, and directly adding the reduced pellets into a lining electroslag furnace for being smelted into pure iron. The device comprises an internal-external heating vertical reducing furnace, a lining electroslag furnace and a residual heat recovery system. The invention has the advantages that: firstly, the reduction temperature is low, the speed is high, the energy consumption is reduced, the production cost is lowered, the production efficiency is high, and the uniformity of the quality is good; secondly, the degree of mechanization is high, the procedure is simple, the yield is large, the mass production can be performed; thirdly, the waste of raw materials is reduced, the environment pollution is lowered; fourthly, the source of raw materials adopting iron ore concentrate powder and iron-containing metallurgical waste, the cost is low; fifthly, the waste resource can be recycled so as to save the resource consumption; and sixthly, the high-temperature pellets are directly smelted by adopting the lining electroslag furnace, the heat efficiency is high, the energy consumption is low, the material purity is high and the quality is good, and the device is simple with less investment.

Description

technical field [0001] The invention relates to a ferrous metal smelting method, in particular to a pure iron smelting process and equipment. Background technique [0002] Pure iron refers to a kind of iron with a carbon content less than or equal to 0.025% and a low content of manganese, silicon, sulfur, phosphorus and other harmful elements and oxide inclusions in iron. Pure iron not only has a certain strength, but also has high toughness and high soft magnetic properties, and its electrical conductivity and corrosion resistance are much better than ordinary iron and steel, so it is an excellent choice for electrical alloys and some advanced alloy steels. It is mainly used for the production of metallurgical products that require extremely low carbon content and steel inclusion content, such as electrical steel, electromagnet core, NdFeB magnetic material, electrical silicon steel sheet, superalloy and ultra-low carbon stainless steel. raw materials. [0003] In order t...

AI Technical Summary

Problems solved by technology

However, H 2 The preparation cost is expensive, and H 2 The primary utilization rate is about 25%, the energy consumption per ton of iron is relatively high, and it is still difficult to prepare micro-nano powder in large quantities in industry, and the preparation cost is high

Under the current conditions, this achievement does not yet have industrial application

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