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Coal blending and coking method capable of reducing coke granularity

A particle size and coal blending technology, used in coke ovens, petroleum industry and other directions, can solve problems such as low feasibility, high rectification costs, and many problems to be solved, and achieves the effect of simple implementation, improved coke particle size, and increased cost.

Active Publication Date: 2014-12-10
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the above method is to adjust the particle size of coke by means other than coking coal blending, the cost of rectification is high, and there are many problems to be solved in the production process, so the feasibility in production is not very strong

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the present embodiment, by weight, coking coal is 42%, gas coal is 5%, 1 / 3 coking coal is 28%, gas fat coal is 5%, fat coal is 10%, and lean coal is 10%.

[0021] Among them, the shrinkage of gas coal is 45mm, and the volume curve of the colloidal layer is a smooth descending type; the shrinkage of 1 / 3 coking coal is 37mm, and the volume curve of the colloidal layer is "Zigzag"; the average particle size of coke obtained from coking is 55mm.

Embodiment 2

[0023] In the present embodiment, by weight, coking coal is 42%, gas coal is 5%, 1 / 3 coking coal is 28%, gas fat coal is 5%, fat coal is 10%, and lean coal is 10%.

[0024] Among them, the shrinkage of gas coal is 38 mm, and the volume curve of the colloidal layer is a smooth descending type; the shrinkage of 1 / 3 coking coal is 40 mm, and the volume curve of the colloidal layer is waveform; the particle size of coke obtained from coking is 52 mm.

Embodiment 3

[0026] In the present embodiment, by weight, coking coal is 42%, gas coal is 5%, 1 / 3 coking coal is 28%, gas fat coal is 5%, fat coal is 10%, and lean coal is 10%.

[0027] Among them, the shrinkage of gas coal is 52mm, and the volume curve of the colloidal layer is a smooth descending type; the shrinkage of 1 / 3 coking coal is 29mm, and the volume curve of the colloidal layer is "zigzag"; the particle size of the coke obtained from coking is 56mm.

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Abstract

The invention discloses a coal blending and coking method capable of reducing the coke granularity. The method comprises the following steps of: 1) detecting the gelatinous layer index of regulating coal to obtain a final shrinkage degree X, and observing the volume curve of the gelatinous layer; preparing the regulating coal with the final shrinkage degree X more than 35mm or the regulating coal with the final shrinkage degree X less than or equal to 35mm and more than 28mm and a zigzag shaped volume curve of the gelatinous layer, wherein the regulating coal accounts for 25 to 40 percent of the coke by weight and comprises gas coal and 1 / 3 coking coal, and the gas coal accounts for 0 to 10 percent of the regulating coal by weight; and 2) adding other single coals to realize the sum of the gas-fat coal and fat coal to be between 8 and 15 percent by weight, the coking coal to be between 32 and 42 percent by weight, and lean coal to be between 5 to 13 percent by weight. The method can be used for improving the coke granularity from the point of coal blending and coking, does not need to change the prior production process or add other mill coal, can be used for regulating the coke granularity by regulating the existing coal blending structure, is simple in implementation, strong in operability and low in cost.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coking coal blending method for reducing the particle size of coke. Background technique [0002] One of the main effects of coke on blast furnace ironmaking is the skeleton effect of the furnace charge. During the smelting process, the air permeability of the lower material column of the blast furnace is almost completely maintained by coke, which acts as a ventilation window for gas. Appropriate average particle size of coke is very important to the stable and high production of blast furnace. To ensure that the blast furnace charge goes straight and ventilated, especially in the case of oxygen-enriched coal injection, the particle size of the coke must be as uniform as possible. The specific particle size composition is determined according to the volume of the blast furnace, the raw materials used and the operating system of the blast furnace. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/04
Inventor 张雪红薛改凤宋子逵项茹任玉明陈鹏詹立志鲍俊芳张前香陈细涛
Owner 武汉钢铁有限公司
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