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Novel sintering ore blending method for regulating and controlling calcium ferrite-based binding phase based on MgO/Al2O3

A new method, the technology of calcium ferrite, is applied in the field of sinter ore blending based on MgO/Al2O3 to control the calcium ferrite-based binder phase, which can solve the problems affecting the production of blast furnace and the metallurgical properties of sinter

Pending Publication Date: 2021-04-06
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the content of MgO in sinter is too high, it will affect the metallurgical properties of sinter, thus affecting the production of blast furnace

Method used

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  • Novel sintering ore blending method for regulating and controlling calcium ferrite-based binding phase based on MgO/Al2O3
  • Novel sintering ore blending method for regulating and controlling calcium ferrite-based binding phase based on MgO/Al2O3

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Experimental program
Comparison scheme
Effect test

Embodiment

[0024] The general idea and implementation steps of the embodiment are as follows:

[0025] The main components of a sintered raw material are shown in Table 1.

[0026] Table 1 The main components of a sintering raw material

[0027]

[0028] Consult the phase diagram, when MgO / Al 2 o 3 When the ratio is in the range of 0.49 to 0.66, the composite calcium ferrite binder phase has better fluidity, and the sintering performance is the best in this range, and the sintering process is relatively smooth.

[0029] Adjust the sintering raw material MgO / Al by adding additives (dolomite powder) 2 o 3 within the range of 0.49 to 0.66.

[0030] By adjusting MgO / Al 2 o 3 (Change between 0.49 and 0.66) Analyze the changing rules of fluidity index, liquid phase formation temperature and melting time of calcium ferrite-based binder phase.

[0031] According to the experimental analysis, MgO / Al 2 o 3 When changing between 0.49 and 0.66, the fluidity index of the calcium ferrite-...

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Abstract

The invention belongs to the field of iron ore agglomeration in the iron making process, and discloses a novel sintering ore blending method for regulating and controlling a calcium ferrite-based binding phase based on MgO / Al2O3. The method comprises the following steps: carrying out component analysis on a sintering raw material, adjusting MgO / Al2O3 to a certain range, and verifying the liquid phase generation capability of the adjusted MgO / Al2O3 sintering raw material. By means of the novel sintering ore blending method, the technical progress can be brought to various aspects such as theoretical basis perfection, process progress, process improvement and optimization of sinter production.

Description

technical field [0001] The invention belongs to the field of iron ore agglomeration in the ironmaking process, and relates to a new method for controlling liquid phase formation in the sintering process, in particular to a new sintering ore blending method based on MgO / Al2O3 regulating the calcium ferrite-based binder phase. Background technique [0002] Blast furnace ironmaking is still an important part of the "blast furnace-converter" process in steel production. The proportion of sintered ore in blast furnace ironmaking raw materials exceeds 70%, so the quality of sintered ore has an important impact on the smooth operation of blast furnace and the economic benefits of steel enterprises . [0003] During the sintering ore-forming process, the formation rule of the liquid phase and the mineral phase structure directly affect the strength and metallurgical properties of the sinter. The calcium ferrite-based binder phase is the main liquid phase composition in the sintering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 胡长庆师学峰韩伟刚龙跃李永生韩涛张玉柱王志星
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY