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A kind of highly reactive coke and its preparation method

A high-reactivity, coking technology, applied in the field of coking, can solve problems such as blast furnace operation impact, sinter production organization and sinter product quality, and achieve comprehensive utilization, easy popularization and application, and meet the needs of blast furnace smelting

Active Publication Date: 2020-06-05
MCC CAPITAL ENGINEERING & RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] At present, for the recycling of iron-containing dust from steel mills, it is generally returned to the sintering process as sintering ingredients, but harmful elements such as alkali metals and zinc in these dusts will be cyclically enriched during use, which affects the organization and sintering of sintering production on the one hand. The quality of mineral products, on the other hand, will also adversely affect the operation of the blast furnace

Method used

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  • A kind of highly reactive coke and its preparation method
  • A kind of highly reactive coke and its preparation method
  • A kind of highly reactive coke and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0050] (1) First, select main coking coal and 1 / 3 coking coal with stable composition (please refer to Table 2 and Table 3 for main indicators and mass ratio) as coking raw materials, and carry out crushing and screening respectively to control the proportion of coking raw materials whose particle size is not greater than 3mm It accounts for more than 80% of the total mass fraction.

[0051] (2) Add converter fine ash according to a predetermined ratio (see Table 3 for the specific ratios of Examples 1 to 4, which is the mass of converter fine ash in the total mass of coking raw materials) uniformly added to the coking obtained in step (1) A coal sample with converter fine ash is added to the raw material. The total mass fraction of TFe and CaO in the converter fine ash is 58% of the total mass. In order to ensure the uniformity of coking ingredients and the catalytic effect, the smaller the particle size of the converter fine ash is The smaller the better, the more uniform the b...

Embodiment 5～8

[0065] (1) First select main coking coal and 1 / 3 coking coal with stable composition (the main indicators are the same as in Example 1, please refer to Table 5 for the proportioning plan) as the coking raw materials, crush and screen them separately, and control the particle size of the coking raw materials to be no more than 3mm The proportion accounts for more than 80% of the total mass fraction.

[0066] (2) Add the converter crude ash according to a predetermined ratio (see Table 5 for the specific ratios of Examples 5-8, which is the ratio of the converter crude ash mass to the total mass of the coking raw materials) to step (1) In the obtained coking raw materials, the total mass fraction of TFe and CaO in the converter crude ash is 75% of the total mass. In order to ensure the uniformity of coking ingredients and the catalytic effect, the smaller the particle size of the converter crude ash, the better, the more uniform the Well, it is preferable that the 90% particle size...

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Abstract

The invention provides high-reactivity coke and a preparation method for the same. The method comprises the following steps: crushing and sieving a coking raw material, and mixing the coking raw material and iron-containing dust slime in an amount which is 1 to 15 percent on the basis of the weight of the coking raw material to obtain a coal sample with the iron-containing dust slime, the sum of the TFe content and the CaO content of the iron-containing dust slime being 40 percent or more of the total mass and the particle size range of 90 percent of the iron-containing dust slime being 5 to 50 mu m; drying the coal sample with the iron-containing dust slime, and adding water to prepare a coal sample added with the water; tamping and compacting the coal sample added with the water for high-temperature dry distillation coking; performing dry coke quenching to obtain the high-reactivity coke. According to the method, the high-reactivity coke is prepared by virtue of solid waste resources, i.e. the iron-containing dust slime, of a steel plant, so that the solid waste resources of the steel plant are greatly and effectively utilized, and meanwhile, the production cost of the high-reactivity coke is greatly reduced; a process is simple and easy to popularize and use.

Description

Technical field [0001] The invention relates to a coke and a preparation method thereof, in particular to a high-reactivity coke prepared by iron-containing dust sludge of a steel plant and a preparation method thereof, and belongs to the technical field of coking. Background technique [0002] As a blast furnace fuel, coke is an important milestone in the history of blast furnace smelting development, and its role in the blast furnace is very important. The research on coke quality has also been the focus of many metallurgical workers for a long time. It is of great significance to improve coke quality, reduce the amount of coke in blast furnaces, and reduce environmental pollution caused by coke production. [0003] Blast furnaces generally require the reactivity index of coke to be within a certain range, so that the strength of coke after reaction in the blast furnace can be ensured. Highly reactive coke refers to coke and CO 2 The ability to undergo gasification reaction incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/04C10B53/04
CPCC10B53/04C10B57/04
Inventor 郭豪李传民薛庆斌
Owner MCC CAPITAL ENGINEERING & RESEARCH