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Liquid-gas two-phase medium coupling partition blowing sintering method and blowing device

A technology of injection device and sintering method, which is applied in the field of liquid-gas two-phase medium coupling partition injection sintering, liquid-gas two-phase medium coupling partition injection device, and injection sintering field, which can solve the problems of insufficient combustion energy and high production cost

Active Publication Date: 2020-12-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the gaseous fuel injection sintering technology of the prior art faces the problem of insufficient combustion energy. The gaseous fuel combustion cannot provide sufficient combustion energy for the sintered material surface, so that it has to be mixed into the pellets during the preparation of the sintered mixture. A large amount of coal is input, and the production cost is high

Method used

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  • Liquid-gas two-phase medium coupling partition blowing sintering method and blowing device
  • Liquid-gas two-phase medium coupling partition blowing sintering method and blowing device
  • Liquid-gas two-phase medium coupling partition blowing sintering method and blowing device

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Embodiment approach

[0094] According to the first embodiment of the present invention, a liquid-gas two-phase medium coupling partition injection sintering method is provided:

[0095] A liquid-gas two-phase medium coupling partition injection sintering method, the method includes the following steps: 1) obtaining the particle size D of the current mixed material to be sintered; 2) sending the mixed material to be sintered into a sintering machine through a trolley for sintering , spraying gaseous fuel and liquid fuel to the material surface of the trolley in the form of partitions; 3) real-time monitoring when the mixture to be sintered is sintered on the trolley, to obtain the water vapor volume concentration C on the sintered material surface in each partition 水 and CO volume concentration C CO ; 4) according to step 1) and step 3) data D, C 水 、C CO , compare it with the historical average data stored in the system, so that one of the injection sintering methods of pure gaseous fuel sinterin...

Embodiment 1

[0129] According to the first embodiment of the present invention, a liquid-gas two-phase medium coupling partition injection sintering method is provided:

[0130] A liquid-gas two-phase medium coupling partition injection sintering method, the method includes the following steps: 1) obtaining the particle size D of the current mixed material to be sintered; 2) sending the mixed material to be sintered into a sintering machine through a trolley for sintering , spraying gaseous fuel and liquid fuel to the material surface of the trolley in the form of partitions; 3) real-time monitoring when the mixture to be sintered is sintered on the trolley, to obtain the water vapor volume concentration C on the sintered material surface in each partition 水 and CO volume concentration C CO ; 4) according to step 1) and step 3) data D, C 水 、C CO , compare it with the historical average data stored in the system, so that one of the injection sintering methods of pure gaseous fuel sinterin...

Embodiment 2

[0132] Repeat embodiment 1, just step 4) in data D, C 水 、C CO Substitute into formula (1) to obtain the judgment parameter δ of each partition above the trolley;

[0133]

[0134] Judging the size of δ, choose the injection sintering method:

[0135] When δ≤1, the sintering method of pure gaseous fuel injection sintering is adopted;

[0136] When 1<δ≤2, the sintering method of mixed injection sintering is adopted;

[0137] When δ>2, the sintering method of pure liquid fuel injection sintering is adopted;

[0138] Among them, D, C 水 、C CO The units are mm, %, %; D 平均 is the historical average particle size of the mixture to be sintered, mm; C 水平均 is the historical average volume concentration of water vapor during sintering, %; C CO平均 is the historical average volume concentration of CO during sintering, %; k1 is the particle size coupling coefficient, which takes a value of 0.7; k2 is the water vapor concentration coupling coefficient, which takes a value of 0.5; k3...

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Abstract

The invention provides a liquid-gas two-phase medium coupling partition blowing sintering method and a blowing device. The method comprises the following steps that (1) the particle size D of a to-be-sintered mixture is obtained; (2) the to-be-sintered mixture is fed into a sintering machine through a trolley to be sintered, and gas fuel and liquid fuel are blown to the material face of the trolley in a partition manner; (3) when the to-be-sintered mixture is sintered on the trolley, the water vapor volume concentration CCO of C water and CO on the sintered material face in each partition is monitored in real time; and (4) according to the data water and CCO in the step (1) and the step (3), one blowing sintering manner of pure gas fuel sintering, pure liquid fuel sintering and mixed sintering blowing sintering manners is selected, and the blowing sintering manner in the step (2) is adjusted. According to the technical scheme, atomized liquid fuel and gas fuel are mixed, the combustionvalue of the blowing sintering technology is increased, the blowing amount range of the blowing sintering technology is widened, and the requirement for the extreme combustion blowing amount is met.

Description

technical field [0001] The invention relates to an injection sintering method, in particular to a liquid-gas two-phase medium coupling zone injection sintering method, which belongs to the technical field of mineral material sintering; the invention also relates to a liquid-gas two-phase medium coupling zone injection device. Background technique [0002] The sintering process is a key link in the ironmaking process. Its principle is to mix various powdery iron-containing raw materials with an appropriate amount of liquid fuel and flux, add an appropriate amount of water, and mix and pelletize the materials on the sintering equipment. A series of physical and chemical changes occur, sintered into blocks, and then sent to the blast furnace for the next step. Sintering is the main raw material processing technology for iron and steel smelting in my country, and more than 75% of blast furnace raw materials come from sintering ore. But sintering is a typical high energy consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16F27D3/16
CPCC22B1/16F27D3/16F27D2003/165
Inventor 周浩宇范晓慧甘敏
Owner CENT SOUTH UNIV
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