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Sinter of high-portion FMG super special powder

A technology for sintered ore and super-special powder, applied in the field of sintered ore, can solve the problems of sintered ore quality influence, unfavorable blast furnace production of sintered ore quality, etc., and achieves the effects of low cost, high performance index and reduced iron cost

Active Publication Date: 2019-05-31
SHIJIAZHUANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The proportion of FMG super special powder in domestic iron and steel enterprises generally does not exceed 30%. If it exceeds, it will have a great impact on the quality of sinter, and the drum index will be lower than 75%. Blindly using it and increasing its proportion will affect the quality of sinter and Adverse effects on blast furnace production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The sintered ore of this high proportion FMG super special powder is specifically described as follows.

[0023] (1) Ratio of sintering mixture: the iron-containing powder includes 81wt% mixed ore powder and 19wt% returned ore. The ratio of the mixed mineral powder is (wt): fine powder 15%, FMG super special powder 43%, Mike powder 17%, PB powder 7%, a steel powder 18%. The solid fuel is coal, and the addition amount is 5.5% of the total weight of the sinter mixture. The flux is quicklime with 7.1% of the total weight of the sintered mixture and dolomite with 6.6% of the total weight of the sintered mixture.

[0024] (2) Production process: Configure mixed ore powder according to the above ratio, add returned ore, and mix into iron-containing powder. Take the iron-containing material powder, add solid fuel and flux according to the above ratio, and send it to the sintering machine through the first mixer and the second mixer to mix evenly; add 8% of the ...

Embodiment 2

[0027] Embodiment 2: The sintered ore of this high proportion FMG super special powder is specifically described as follows.

[0028] (1) Ratio of sintering mixture: the iron-containing powder includes 83wt% mixed ore powder and 17wt% returned ore. The ratio of the mixed mineral powder is (wt): fine powder 16%, FMG super special powder 43%, Mike powder 17%, PB powder 7%, a steel powder 17%. The solid fuel is coal, and the addition amount is 5.7% of the total weight of the sinter mixture. The flux is quicklime with a total weight of 7.2% of the sintered mixture and dolomite with a total weight of 6.9% of the sintered mixture.

[0029] (2) Production process: Configure mixed ore powder according to the above ratio, add returned ore, and mix into iron-containing powder. Take the iron-containing material powder, add solid fuel and flux according to the above ratio, and send it to the sintering machine through the first mixer and the second mixer to mix evenly; add 9% of the tota...

Embodiment 3

[0032]Embodiment 3: The sintered ore of this high proportion FMG ultra-special powder is specifically described as follows.

[0033] (1) Ratio of sintering mixture: the iron-containing powder includes 80wt% mixed ore powder and 20wt% returned ore. The ratio of the mixed mineral powder is (wt): fine powder 17%, FMG super special powder 44%, Mike powder 17%, PB powder 7%, a steel powder 15%. The solid fuel is coal, and the addition amount is 5.5% of the total weight of the sinter mixture. The flux is quicklime with a total weight of 7.4% of the sintered mixture and dolomite with a total weight of 7.0% of the sintered mixture.

[0034] (2) Production process: Configure mixed ore powder according to the above ratio, add returned ore, and mix into iron-containing powder. Take the iron-containing material powder, add solid fuel and flux according to the above ratio, and send it to the sintering machine through the first mixer and the second mixer to mix evenly; add 8% of the total...

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Abstract

The invention discloses sinter of high-portion FMG super special powder. The sinter is formed by mixing and sintering mixed mineral powder, return fines, flux and solid fuel. The mixed mineral powdercomprises the mineral powder of, by mass, 15% to 17% of fine powder, 43% to 47% of FMG super special powder, 12% to 17% of Mac fines, 4% to 7% of PB powder, and 15% to 18% of first steel powder. According to the sinter of the high-portion FMG super special powder, the FMG ore is used as the main material, and is used together with various types of mineral powder and the solid fuel according to certain proportions, the drum index and the low-temperature reduction degradation index of the sinter are effectively guaranteed, and the cost of the sinter can be effectively reduced, and therefore, thesinter has the characteristics of being good in quality, high in performance index, low in cost and the like. The drum index of the sinter is larger than or equal to 77%, the sum of low-temperature reduction degradation index of the sinter plus 3.15 is larger than or equal to 75%, the quality of the sinter can meet the utilization requests of large blast furnaces, and the sinter is broad in application range. Because the high-proportion FMG super special powder is adopted for the sinter, the cost of iron is greatly reduced.

Description

technical field [0001] The invention relates to a sintered ore, in particular to a sintered ore with a high proportion of FMG super special powder. Background technique [0002] High alkalinity sinter has always been the main raw material for blast furnace ironmaking in my country. Sinter production has a decisive impact on blast furnace ironmaking in terms of the proportion of furnace charge, pig iron cost, waste discharge and environmental protection. The quality of sinter plays a key role in blast furnace iron production, energy consumption, pig iron quality and blast furnace life. [0003] As the structure optimization of sintering raw materials continues to deepen, it is found that the structural optimization potential of major large mines (high-quality mines such as card powder, Newman powder, Yangdi powder, etc.) High cost performance. In particular, FMG super special powder, India powder, Yisteel powder, Atlas powder and other materials are always in the forefront...

Claims

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Application Information

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IPC IPC(8): C22B1/16
Inventor 李杰薛松华祺年阎岩李斌左静宇李小宝姜勇硕武海林曹俊卿梁振华成亚良赵金龙张海岸柳敏张纯
Owner SHIJIAZHUANG IRON & STEEL
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