A two-stage down-entrained entrained bed ironmaking system and ironmaking process

Abstract

The invention discloses a two-stage descending entrained-flow iron-making system and an iron-making process, comprising: a melting furnace section, which is arranged vertically downward, a basic combustion / gasifier is arranged at the top of the melting furnace, and a basic combustion / gasifier is arranged below the basic combustion / gasifier The first inlet and the second inlet, the first inlet and the second inlet are uniformly arranged along the side wall of the melting furnace section, forming a tangent circle in the melting furnace section, and the second inlet is located below the first inlet; The pulverized coal source, the air source and the water vapor source are connected; a slag pool is set at the bottom of the melting furnace section, a slag pool is provided with a slag tapping device and an iron tapping device, and the downstream end of the slag pool is the outlet end; the pre-reduction furnace section is set vertically downward, The top is connected to the outlet end of the melting furnace section, the third inlet and the fourth inlet are arranged above the pre-reduction furnace section, the bottom is the outlet, the third inlet is connected to the source of tempering and tempering medium, and the fourth inlet is connected to the iron ore powder. a source connection; and a first separator, the inlet of which is connected to the outlet of the pre-reduction furnace section, and the bottom outlet of which is connected to the second inlet through a conveying pipe.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a two-stage downdraft-type iron-making process. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Blast furnace ironmaking is currently the main method of producing steel, and its dominance is not expected to change in the short term. This method is a continuous metallurgical method for reducing iron ore to iron in a blast furnace. The smelting process is as follows: according to the specified ratio, iron ore, coke, and flux for slagging are loaded from the top of the furnace, and the furnace The throat material surface is kept at a certain height, coke and o...

AI Technical Summary

Problems solved by technology

Existing non-blast furnace ironmaking technologies include direct reduction methods of gas reduction, direct reduction methods using solid reducing agents, and typical smelting reduction processes such as Corex process, Finex process, and HIsmelt process, but each of the above processes has different problems, such as reduction Low efficiency, low recovery rate of waste heat, still need some metallurgical coke, etc., no ironmaking process with simple process and low energy consumption

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