COREX smelting reduction iron making equipment and iron making method

Abstract

The invention discloses COREX smelting reduction iron making equipment and an iron making method. A distributive raw material feeding device rotates to feed raw materials into a vertical furnace reduction furnace; and a spiral stirrer rotates to slide the raw materials along a spiral plate. Compressed carbon monoxide enters a hollow rotating shaft from the upper end for blowing out from the lower end. A pulverized coal spraying device 2 sprays pulverized coals into space of an exhaust insulation pipe of a smelting gasification furnace above an exhaust port of the vertical furnace reduction furnace; and the discharged pulverized coals are rich in oxygen, so that the pulverized coals are insufficiently burnt to heat the raw materials falling from the spiral stirrer. Carbon monoxide and iron ore powder in the spiral stirrer are reacted to generate carbon dioxide and sponge iron. Compressed and heated carbon monoxide enters sponge iron from the lower part of the vertical furnace reduction furnace. Sponge iron is conveyed on a fire grate of the smelting gasification furnace. The pulverized coal spraying device 1 sprays the pulverized coals below the fire grate in the smelting gasification furnace for combustion; and heat generated by combustion of the pulverized coals melts sponge iron and furnace slag falling on the fire grate. The heated carbon monoxide is blown into molten iron of the smelting gasification furnace.

Description

Technical field: [0001] The invention relates to a COREX smelting reduction ironmaking equipment and an ironmaking method. Background technique: [0002] The 3,000-ton COREX iron-making equipment introduced by Shanghai Baosteel in my country in the past few years was installed in Shanghai Luojing Branch. Although it is environmentally friendly, the coal consumption is twice that of blast furnace iron-making. COREX iron-making equipment was transferred to the coal-rich Xinjiang Autonomous Region. The body of the COREX furnace is composed of the upper reduction furnace and the lower melting gasifier. The reduction furnace is divided into three types: shaft furnace, tank furnace and fluidized bed furnace. The principle of COREX ironmaking using a shaft furnace reduction furnace is as follows: lump ore, pellets and flux (limestone and quartz) are intermittently fed into the shaft furnace reduction furnace through a bellless feeding device, and then the pure Very high temperatu...

AI Technical Summary

Problems solved by technology

Moreover, the iron-rich ore used by COREX is not available in our country; my country uses low-content iron ore and low-tech water gas to produce carbon monoxide, and the process of reducing carbon monoxide to pellet sinter takes a long time and the heat loss is too large, so that The coal consumption of my country's COREX ironmaking is too high, and the COREX furnace using the shaft furnace reduction furnace cannot directly use fine ore

[0003] my country uses semi-water gas to produce gas, and the production efficiency is very low, and the content of carbon monoxide and hydrogen in the gas is very low

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