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Coking method for improving coke granularity

A technology of coke and particle size, applied in the field of coal chemical industry, achieves the effects of low treatment cost, reduction of cracks in coke and improvement of particle size of coke

Inactive Publication Date: 2019-12-31
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a coking method for increasing the particle size of coke, which mainly solves the technical problem in the prior art that the improvement of the particle size of coke and the reduction of coking cost cannot be taken into account in the prior art. Simultaneously increased coke particle size

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific examples, as shown in Table 1-2.

[0025] A coking method for increasing coke particle size, comprising the steps of:

[0026] 1) Detect the coal rock reflectance R of coking coal, and screen out high metamorphic degree coking coal and low metamorphic degree coking coal. The rate R is 1.1-1.3%;

[0027] 2) Detect the MF of the coking coal, pre-crushing the coking coal with the MF ≤ 100ddpm, and control the particle size of the coking coal after crushing to ≤ 3mm;

[0028] 3) Coal blending, high metamorphic degree coking coal, low metamorphic degree coking coal and other coking coals are blended according to the following mass percentages, high metamorphic degree coking coal 15-20%, low metamorphic degree coking coal 15-20%, lean coal 8-12% , 1 / 3 coking coal 15-20%, fat coal 20-25%, gas coal 12-17%, the sum of the mass percentages of each coking coal is 100%; ;

[0029] 4) The mixed co...

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Abstract

The invention discloses a coking method for improving coke granularity. In the prior art, the coke granularity increase and the coking cost reducing cannot be simultaneously achieved in the top-loading coke oven. A purpose of the present invention is mainly to solve the problem in the prior art. The technical scheme comprises that the coking method comprises: detecting the coal rock reflectivity Rof coking coal is detected to screen high-metamorphism coking coal and low-metamorphism coking coal; detecting the Gieseler fluidity MF of the coking coal, and pre-breaking the coking coal with the Gieseler fluidity MF of less than or equal to 100 ddpm; carrying out coal blending, wherein the high-metamorphism coking coal, the low-metamorphism coking coal and other coking coal are blended according to a certain mass ratio; breaking the mixed coal; coking the blended coal, wherein the broken mixed coal is fed into a top-loading coke oven, and is subjected to coking at a coking temperature of 1000 + / -50 DEG C for 20+ / -2 h; and cooling after coke discharging, wherein a coke dry quenching process is adopted for coke cooling. According to the method of the invention, the coke granularity is improved, the coking process does not need to be changed, the technology is simple and feasible, and the coking cost is low.

Description

technical field [0001] The invention relates to a coking method, in particular to a coking method for increasing coke particle size, and belongs to the technical field of coal chemical industry. 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. ...

Claims

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Application Information

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IPC IPC(8): C10B57/04
CPCC10B57/04
Inventor 张文成任学延
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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