High-efficiency all-oxygen iron furnace

Abstract

The invention provides a high-efficiency all-oxygen iron furnace. The furnace comprises a furnace hearth, connecting from bottom to top in sequence, a heat exchange reduction cylinder, and a speed reduction filter cover, and the entirety is in dumbbell-shaped arrangement; the furnace hearth and the heat exchange reduction cylinder and the inside of the speed reduction filter cover are interpenetrated; the inside of the furnace hearth is sequentially provided with a molten iron layer, a slag layer, a coke layer and a combustion layer from bottom to top; at least two cooler air spray guns are arranged at the top of the heat exchange reduction cylinder; at least two first oxygen lances are arranged at the upper middle portion of the heat exchange reduction cylinder; a filter structure is arranged in the speed reduction filter cover; a plurality of micropores and at least one filter material discharge hole are arranged on the speed reduction filter cover; an exhaust gas discharge port anda filter material feeding port are arranged on the speed reduction filter cover; and a mineral nozzle is arranged on the speed reduction filter cover. According to the furnace, the problems that a traditional furnace is incapable of using all-oxygen for melting and has a long reaction period, the prior smelting reduction process is uncontrollable reaction process and has a long reaction period, and the heat exchange in the flash ironmaking process is unreasonable are all solved.

Description

technical field [0001] The invention relates to the technical field of non-blast furnace ironmaking, in particular to a high-efficiency full-oxygen ironmaking furnace. technical background [0002] Blast furnace ironmaking is a reduction smelting process that uses coke as a heating agent and reducing agent to reduce iron ore into molten iron. The sintered ore, some massive iron ore, coke, and flux are distributed from the top of the furnace according to a certain rule and then descend continuously. The high-temperature gas in the tuyere area moves from bottom to top, and heats the slowly falling charge during the upward movement in the furnace. This reverse movement of the gas and charge makes the energy in the blast furnace reasonably and fully utilized. However, the severe environmental pollution caused by iron ore powder agglomeration and coking, and the global supply of scarce coking coal have prompted ironmaking enterprises to try to get rid of their dependence on meta...

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Problems solved by technology

[0007] The invention provides a high-efficiency full-oxygen ironmaking furnace, which can solve the problem that the traditional blast furnace ironmaking cannot use full-oxygen smelting, and the process takes a long time; it can solve the problem of the uncontrollable reaction of the existing smelting reduction processes COREX and FINEX The problem of low efficiency is caused; it can solve the problem of excessively high exhaust gas caused by unreasonable heat exchange in the flash ironmaking process in the experimental stage, about 1500 degrees, and the particle size of ore powder is too small, with an average of 0.074mm, resulting in excessive dust in the exhaust gas , more than 10% of the problems

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