Coking and coal blending method with participation of gas coal

A gas-coal and coal blending technology, which is applied in the field of coking coal blending in which gas-coal participates, can solve problems such as low blending amount, large coke lumpiness, and poor wear resistance

Active Publication Date: 2012-08-01

武汉钢铁有限公司

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AI-Extracted Technical Summary

Problems solved by technology

The coke obtained by coking alone has large lumps and few cracks, but poor wear resistance

At present, under the condition of not adopting briquette ramming coking and othe...

Abstract

The invention discloses a coking and coal blending method with participation of gas coal, which comprises the step of blending the gas coal with the caking index G value of 50-70; coking coal No.1 with the coking coarse grain mosaic texture proportion of more than 60 percent; coking coal No.2 with the coking coarse grain mosaic texture proportion of below 60 percent; fat coal with the maximum Gieseler fluidity (MF) of more than 60000ddpm, the Arnu-Audibert's dilatometer b value of more than 150 percent, and the coking coarse grain mosaic texture proportion of more than 40 percent; and blending 1/3 coking coal and lean coal; and controlling briquette blend to be with the coking coarse grain mosaic texture proportion of more than 35 percent, the caking index G value of 79-82, and the thickness of colloidal matter layer of 17-19mm. Due to the prepared briquette blend, not only is the compounding amount of the gas coal increased to 5-15wt percent, but also the compounding amount of the coking coal and the fat coal is reduced, the coking coal resources can be utilized reasonably, the coal blending cost is reduced, the CSR of the coke refined through a coke oven with the height of more than 6m is greater than 63 percent under the technological conditions of non-step crushing, briquette coal process or tamping coking and the like.

Application Domain

Coke ovens

Technology Topic

BriquetteEngineering +2

Image

Examples

Experimental program(1)

Example Embodiment

[0012] The present invention will be described in further detail below in conjunction with specific embodiments.

[0013] In the coking coal blending method involving gas coal of the present invention, the coking index G value of the gas coal is 50-70, the blending amount of the gas coal is 5-15 wt%, and the coal blending steps are as follows:

[0014] 1) 15-25wt% coking coal 1# is added, and the coking coal 1# has a coke-forming coarse-grain mosaic structure ratio of ≥60%;

[0015] 2) 5-20wt% of fat coal is added, the maximum Gigabit fluidity MF of the fat coal is more than 60000ddpm, the b value of the Oya expansion degree is more than 150%, and the proportion of coke coarse grain mosaic structure is more than 40%;

[0016] 3) Mix in 1/3 coking coal, coking coal 2# and lean coal, and make the proportion of coking coarse-grain mosaic structure of the mixed coal reach more than 35%, the bonding index G value is 79-82, and the colloidal layer thickness Y value is 17-19mm, and the proportion of coking coarse-grain mosaic structure of the coking coal 2# is lower than 60%.

[0017] The coal quality analysis results of each single coal are shown in Table 1, and the specific examples of each coal blending scheme are shown in Table 2.

[0018] Table 1 Coal quality analysis results of a single type of coal

[0019]

[0020] Table 2 Specific examples of coal blending schemes

[0021]

[0022] The cokes obtained in Examples 1, 2, 3, and 4 are all prepared in a coke oven with a height of 6 meters or more under the technological conditions of no grading and crushing, briquette technology or tamping coking.

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