Rotational flow iron smelting method and rotational flow iron smelting device

Abstract

The invention discloses a rotational flow iron smelting method. The rotational flow iron smelting method comprises following steps: a mixed material is delivered into a reaction tower through a material channel; reaction gas is converted into rotational flow, and is delivered into the reaction tower through a rotational flow channel and a Venturi channel; a solid reducing agent is sprayed into a settling pond so as to form a reducing agent floating layer; the rotational flow processed via high speed expansion is subjected to contact reaction with the mixed material in the reaction tower; obtained molten drops are subjected to reaction with the reducing agent floating layer so as to obtain iron and slag, and crude iron is obtained via separation; generated high temperature gas is ignited by a burning gun in an uptake flue, and residual gas is discharged from a smelting furnace into a heat recovery boiler. The rotational flow iron smelting method possesses following advantages: full smelting reaction is realized, oxygen utilization rate is high, reaction gas with an oxygen-enriched concentration can be adopted, requirements of large fluctuation of feeding amount are satisfied, energy yield is increased obviously, energy consumption is reduced, and environment protection effect is improved. The invention also provides a rotational flow iron smelting device suitable for the rotational flow iron smelting method.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal pyrometallurgy, in particular to a method for smelting rotary-floating iron, and also relates to a device for smelting rotary-floating iron suitable for the method for smelting rotary-floating iron. Background technique [0002] Ironmaking is the process of extracting metallic iron from iron-containing minerals (mainly iron oxides). At present, the blast furnace method is widely used, and its operation process is as follows: iron ore is loaded from the top of the furnace during production. , coke, flux (limestone) for slagging, and preheated air is blown into the furnace from the lower part of the furnace. At high temperature, the carbon in coke (some blast furnaces also inject auxiliary fuels such as pulverized coal, heavy oil, and natural gas) burns with the oxygen in the blown air to generate carbon monoxide, which removes the carbon monoxide in the iron ore during the process of risin...

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Problems solved by technology

[0003] Blast furnaces are used for ironmaking, but blast furnace ironmaking requires roasting pellets and coking coal, etc. There are many problems such as long process, large investment, low production efficiency, and more importantly, high energy consumption and serious environmental pollution

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