Method for fusing reducing iron by employing iron ore hot pressing carbon-containing agglomerate

Abstract

Disclosed is a smelting reduction iron making method by iron ore hot pressing carbon bearing lump into shaft furnace, which takes iron concentrate hot pressing carbon bearing lump as raw material and shaft furnace as smelting reduction reactor. Smelting reduction iron is done by injecting pulverized coal into the shaft furnace with industrial oxygen, hot air or high oxygen hot air agitated; the iron bearing power of iron concentrate hot pressing carbon bearing lump is iron concentrate powder; the hot pressing pulverized coal is bituminous coal powder; quicklime acts as flux; the weight percent of each group is as follow: iron concentrate powder 60 to 75 percent, bituminous coal powder 20 to 35 percent and the quicklime powder 20 to 35 percent; iron concentrate pulverized coal hot pressing lump is fed through double bell mix feeding system at the top of the shaft furnace and is preheated, reduced and smelted in the shaft furnace; the pulverized coal is injected from a tuyere of the shaft furnace to supply heat for the reduction and smelting of iron concentrate hot pressing carbon bearing lump. The process is fit for iron making condition of our country with strong adaptability raw material and low energy and oxygen consumption per ton of iron, which does not depend on coke , and is environment-friendly with short flow and low cost.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and relates to smelting reduction ironmaking technology, in particular to a process method for hot-pressing carbon-containing agglomerates with iron concentrate and coal powder into a shaft furnace for smelting reduction ironmaking. Background technique [0002] Rational utilization of resources and clean production have become the main theme of the development of the steel industry. Although my country is a big iron and steel country, it still faces severe challenges in terms of raw and fuel resources, energy consumption and clean production. Solving these problems has become a major demand for the development strategy of my country's iron and steel industry. The new generation of smelting reduction process is one of the major cutting-edge technologies of contemporary metallurgy, and it is also one of the important ways to solve the sustainable development of the iron and steel i...

AI Technical Summary

Problems solved by technology

The main reason is that cold-consolidated products have fatal weaknesses such as poor high-temperature strength caused by high-temperature binder failure, coupled with problems such as increased cost and slag volume of binders, which limit cold-consolidated carbon-containing pellets and corresponding smelting reduction Application and Development of Technology

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