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Sintered mixture and preparation method thereof

A technology of sintering mixture and mixing materials, which is applied in the field of iron and steel metallurgy, can solve the problems of uneven particle size distribution and low particle size ratio, and achieve the effect of improving particle size distribution, distribution dispersion, and good granulation effect

Inactive Publication Date: 2018-10-19
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size distribution of the mixture prepared by the prior art is not uniform, and the particle size ratio of +3mm, especially 3-8mm, is relatively low in the mixture

Method used

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  • Sintered mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add concentrate, fine ore, coke powder, and first quicklime to water according to the mass ratio of 50:33:5:8.4, and then carry out the first mixing in the cylinder mixer to obtain a mixed material, the mixed material The water content is 6.5%; the filling rate of the first mixing is 11%, the rotation speed of the cylinder is 27 rpm, and the mixing time is 3 minutes.

[0045] A blend was sieved to obtain +3 mm pellets and -3 mm pellets.

[0046] After adding water and the second quicklime to the -3mm granules, carry out the second mixing in the cylinder mixer to obtain the second mixed material, the moisture of the second mixed material is 7.5%; the consumption of the first quicklime and the second quicklime The ratio is 8.4:3.6; the ratio of concentrate, fine ore, coke powder and total quicklime is 50:33:5:12, and the total quicklime refers to the sum of the amount of the first quicklime and the second quicklime. This implementation Among the examples, the first quick...

Embodiment 2

[0050] Add concentrate, fine ore, coke powder, and first quicklime to water according to the mass ratio of 50:33:5:10.8, and then perform the first mixing in a cylinder mixer to obtain a mixed material, the moisture content of which is was 6.4%; the filling rate of the first mixing was 11%, the rotating speed of the cylinder was 27 rpm, and the mixing time was 3 minutes.

[0051] A blend was sieved to obtain +3 mm pellets and -3 mm pellets.

[0052] After adding water and the second quicklime to the -3mm granules, carry out the second mixing in the cylinder mixer to obtain the second mixed material, the moisture of the second mixed material is 7.5%; the consumption of the first quicklime and the second quicklime The ratio is 10.8:1.2; the ratio of concentrate, fine ore, coke powder and total quicklime is 50:33:5:12. The total quicklime refers to the sum of the consumption of the first quicklime and the second quicklime. This implementation In the example, the first quicklime ...

Embodiment 3

[0056] Add concentrate, fine ore, coke powder, and first quicklime to water according to the mass ratio of 50:33:5:8.4, and then perform the first mixing in a cylinder mixer to obtain a mixed material, the moisture content of which is was 7.0%; the filling rate of the first mixing was 11%, the rotating speed of the cylinder was 27 rpm, and the mixing time was 3 minutes.

[0057] A blend was sieved to obtain +3 mm pellets and -3 mm pellets.

[0058] After adding water and the second quicklime to the -3mm granules, carry out the second mixing in the cylinder mixer to obtain the second mixed material, the moisture of the second mixed material is 7.5%; the consumption of the first quicklime and the second quicklime The ratio is 8.4:3.6; the ratio of concentrate, fine ore, coke powder and total quicklime is 50:33:5:12, and the total quicklime refers to the sum of the amount of the first quicklime and the second quicklime. This implementation In the example, the first quicklime con...

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Abstract

The invention provides a preparation method of a sintered mixture. The preparation method comprises the following steps that mineral powder, fuel, first flux and water are subjected to first mixing toobtain a first mixture; the first mixture is screened, and aggregates with the grade of -3 mm and aggregates with the grade of + 3 mm are obtained; the aggregates with the grade of -3 mm, second fluxand water are subjected to second mixing so as to obtain a second mixture; and the second mixture and the aggregates with the grade of + 3 mm are mixed to obtain the sintered mixture. According to the preparation method, the flux is added multiple times so that the flux can be added more uniformly, the distribution is more dispersed, and the granulation effect is better; the flux is added multiple times, so that the prepared sintered mixture can use various kinds of flux instead of being limited to use one kind of flux; and moreover, step-by-step mixing is adopted, and mixtures with small grades are subjected to reinforced granulation and then are mixed with mixtures with medium grades so that the particle size distribution in the mixture can be effectively improved. The invention furtherprovides the sintered mixture.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a sintering mixture and a preparation method thereof. Background technique [0002] Sinter is the main raw material for blast furnace smelting, increasing the output of sinter is extremely beneficial to reduce the cost of pig iron. Improving the air permeability of the sinter mixture layer is an important way to increase the output of sinter, and the granulation of the enhanced mixture can significantly improve the air permeability of the material layer. Generally speaking, the higher the proportion of +3mm particles in the mixture, the smaller the resistance of the air flow through the material layer during the sintering process, the better the air permeability of the sintered material layer, and the faster the sintering speed. Therefore, increasing the particle size ratio of +3mm in the sintering mixture is an important means to improve the air permeability o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/02C21B5/00
Inventor 王禹键饶家庭胡鹏蒋胜
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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