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

An entrained flow bed, two-stage technology, applied in the field of two-stage descending entrained entrained bed ironmaking process, can solve the problems of low reduction efficiency, unrealized process simplicity, low energy consumption, low waste heat recovery rate, etc., to achieve improved reduction efficiency, Effects of reduced footprint and reduced complexity

Active Publication Date: 2020-11-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] like figure 1 As shown, a two-stage downdraft bed ironmaking process device (arrangement 1) has a structure including a melting furnace section 4, which is an airflow descending bed, a basic combustion / gasifier 1 is set on the top, and the upper side is The first inlet 2 for coke (coal) powder (air, water vapor), the pre-reduction mineral powder inlet-the second inlet 3 is set at a distance below it; the mineral powder pre-reduction furnace section 8 is an air flow descending bed, and the upper side is a pre- Hot mineral powder inlet-the fourth inlet 7, the lower part is connected to the inlet of the pre-reduced mineral powder separator-the first separator 9; the melting furnace section 4 and the mineral powder pre-reduction furnace section 8 are connected through the slag pool 5; cooling, temperature adjustment and tempering The medium inlet-the third inlet 6 is set at the connecting pipe between the slag pool 5 and the mineral powder pre-reduction furnace section 8; t...

Embodiment 2

[0063] like figure 2 Shown is another embodiment of the present application. A two-stage descending entrained entrained bed ironmaking process device (arrangement mode 2) has a structure including a melting furnace section 4, which is an airflow descending bed, a basic combustion / gasifier 1 is arranged on the top, and coke powder ( Air, water vapor) inlet-the first inlet 2, a pre-reduced mineral powder inlet-the second inlet 3 is set at a distance below it; the mineral powder pre-reduction furnace section 8 is an airflow descending bed, and the upper side is the mineral powder inlet-the fourth Inlet 7, the lower part is connected to the pre-reduction mineral powder separator-the first separator 9 inlet; the melting furnace section 4 and the mineral powder pre-reduction furnace section 8 are connected through the slag pool 5; the cooling, temperature-regulating and tempering medium inlet-the third inlet 6 is set At the connecting pipe between the slag pool 5 and the mineral p...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/10C21B13/14
CPCC21B13/10C21B13/14C21B13/0006
Inventor 马春元赵媛王涛周滨选周振峰陈娟
Owner SHANDONG UNIV
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