High-temperature high-pressure central charging distribution process method and device for melting reduction furnace

Abstract

The invention relates to a high-temperature high-pressure central charging distribution process method and high-temperature high-pressure central charging distribution device for a melting reduction furnace. In the invention, 800 to 1,250 DEG C high-temperature balls are charged into a melting reduction furnace or a steel smelting furnace with a furnace gas pressure of 0.2 to 2.0MPa and a furnacegas temperature of 1,400 to 1,700 DEG C effectively, high-efficiency energy utilization is realized, the energy-conservation and emission-reduction effects are obvious, the production cost is reducedgreatly, the production efficiency is improved, the equipment is easy to manufacture and convenient to maintain and repair, the sealing effect is desirable, and the use of a heat-resistance and wear-resistance material and a thermal-insulation material makes equipment service life long, equipment heat loss little and thermal efficiency high.

Description

technical field [0001] The invention relates to a high-temperature material distributing device, in particular to a high-temperature and high-pressure series tank distributing device for a smelting reduction furnace or steelmaking equipment, belonging to the technical field of iron and steel metallurgy. Background technique [0002] With the rapid development of the world's iron and steel industry and the international community's increasing emphasis on environmental protection, energy conservation and emission reduction, and the shortage of resources such as iron ore and coking coal, people are constantly looking for an ironmaking or direct steelmaking method that does not use coking coal. It is also being continuously improved. At present, blast furnaces, COREX, FINEX and other ironmaking equipment mainly use string tank-type distributing equipment. This technology has been widely used, but at present, all raw materials at room temperature and working environments below 400...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the world's iron and steel industry and the international community's increasing emphasis on environmental protection, energy conservation and emission reduction, and the shortage of resources such as iron ore and coking coal, people are constantly looking for an ironmaking or direct steelmaking method that does not use coking coal. It is also being continuously improved. At present, blast furnaces, COREX, FINEX and other ironmaking equipment mainly use string tank-type distributing equipment. This technology has been widely used, but at present, all raw materials at room temperature and working environments below 400 °C are added through it. For high-temperature raw materials, especially raw materials with a temperature of 1000-1250 °C and working environments with a temperature of 1200-1700 °C

HISMELT, ROMELT, etc. mainly use spray guns to spray mineral powder. First, the cost of equipment and equipment is high, wear and tear is high, energy consumption is high, and production costs are high; second, high-temperature mineral powder cannot be sprayed, especially mineral powder above 800 ° C.

At present, blast furnaces, COREX, FINEX and other ironmaking equipment adopt string tank type material distribution equipment to adapt to the raw material temperature at room temperature, working pressure less than 0.15MPa, and furnace gas temperature less than 300°C, which cannot meet the raw material temperature of 1000-1250°C and working pressure of 0.20-2.0MPa , Furnace gas temperature 1450 ℃ ~ 1700 ℃ requirements

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