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Liquid-gas two-phase medium coupling mobile injection sintering method and injection device

A sintering method and injection device technology, which is applied in the fields of injection sintering, liquid-gas two-phase medium coupling mobile injection sintering, liquid-gas two-phase medium coupling mobile injection device, and can solve high production costs and insufficient combustion energy, etc. question

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

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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 mobile injection sintering method and injection device
  • Liquid-gas two-phase medium coupling mobile injection sintering method and injection device

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Embodiment approach

[0099] According to the first embodiment of the present invention, a liquid-gas two-phase medium coupled mobile jet sintering method is provided:

[0100] A liquid-gas two-phase medium coupling mobile injection sintering method, the method includes the following steps: 1) Obtain the particle size D of the current mixture to be sintered; 2) Send the mixture to be sintered into a sintering machine through a trolley for sintering , spray gaseous fuel to the sintering material surface of the trolley in an integral form, and spray liquid fuel to the material surface of the trolley in a moving form; 3) monitor in real time when the mixture to be sintered is sintered on the trolley, and obtain current Water vapor concentration C on the sintered surface 水 and CO 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, select one of the injection sintering methods of pure gaseous fuel sintering, pu...

Embodiment 1

[0131] According to the first embodiment of the present invention, a liquid-gas two-phase medium coupled mobile jet sintering method is provided:

[0132] A liquid-gas two-phase medium coupling mobile injection sintering method, the method includes the following steps: 1) Obtain the particle size D of the current mixture to be sintered; 2) Send the mixture to be sintered into a sintering machine through a trolley for sintering , spray gaseous fuel to the sintering material surface of the trolley in an integral form, and spray liquid fuel to the material surface of the trolley in a moving form; 3) monitor in real time when the mixture to be sintered is sintered on the trolley, and obtain current Water vapor concentration C on the sintered surface 水 and CO 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, select one of the injection sintering methods of pure gaseous fuel sintering, pu...

Embodiment 2

[0134] Repeat embodiment 1, but in step 4), data is substituted into formula (1), obtains the judgment parameter δ of the sintered material surface everywhere in the sintering machine;

[0135]

[0136] Judging the size of δ, choose the injection sintering method:

[0137] When δ≤1, the sintering method of pure gaseous fuel injection sintering is adopted;

[0138] When 1<δ≤2, the sintering method of mixed injection sintering is adopted;

[0139] When δ>2, the sintering method of pure liquid fuel injection sintering is adopted;

[0140] 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 coupling coefficient of particle size, the value is 0.6-1.2; k2 is the coupling coefficient of water vapor concentration, the value...

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Abstract

The invention relates to a liquid-gas two-phase medium coupling mobile injection sintering method and an injection device. The method comprises the following steps: 1) the particle size D of a currentmixture to be sintered is obtained; 2) the mixture to be sintered is fed into a sintering machine through a trolley for sintering, gaseous fuel is injected to the sintering material surface of the trolley in an integral form, and liquid fuel is injected to the material surface of the trolley in a moving form; (3) when the mixture to be sintered is sintered on the trolley, the water vapor concentration Cwater and the CO concentration CCO on sintered material surfaces in all node positions are monitored in real time; and 4) one of the injection sintering modes of pure gaseous fuel sintering, pure liquid fuel sintering and mixed sintering is selected, and the injection sintering mode in the step 2) is adjusted. According to the technical scheme, the atomized liquid fuel and the gaseous fuelare mixed, so that the combustion value of injection sintering technology is increased, the range of the injection amount of the injection sintering technology is widened, and the requirement for theextreme combustion injection amount is met.

Description

technical field [0001] The invention relates to a blowing sintering method, in particular to a liquid-gas two-phase medium coupled moving blowing sintering method, which belongs to the technical field of mineral material sintering; the invention also relates to a liquid-gas two-phase medium coupled moving blowing 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 consumption ...

Claims

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Application Information

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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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