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Method for coking with non-coking blind coal

An anthracite, non-coking technology, which is applied in the field of coking, coking, tamping and coking, can solve problems such as the influence of coke quality and strength indicators, and achieve the effect of solving the rapid deterioration of coke quality, significant economic benefits, and solving the shortage of coal resources

Active Publication Date: 2013-01-09
YUNNAN COAL & ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If used improperly, it will have a devastating impact on the quality of coke, especially the strength index.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A. Prepare materials according to the following proportions:

[0019] Rmax 2.0% non-coking anthracite 5 wt%

[0020] Low coalification coal with Rmax of 0.9% 15 wt%

[0021] Medium coalification coal with Rmax of 1.2% 35 wt%

[0022] Rmax is 1.5% medium coalification degree coal 45 wt%;

[0023] B. After the non-coking anthracite of step A is crushed until more than 98% of the particle size is less than 1mm, it is uniformly mixed with the rest of the raw coal to obtain: Rmax is 1.15%, volatile matter is 28.0 wt%, ash is 14.5wt%, viscosity Coal blending with a knot index of 70, a final shrinkage of 40mm, and a maximum expansion of the colloidal layer of 14.5:

[0024] C. Send the mixed coal of step B to a conventional 5.5-meter tamping coke oven. Under the condition that the central temperature is 950°C, the pressure of the fire hole is 4pa, the gas collecting pipe pressure is 95pa, and the suction of the branch flue is 255pa, coking for 28 hours, the cold s...

Embodiment 2

[0026] A. Prepare materials according to the following proportions:

[0027] Non-coking anthracite with Rmax of 2.25% 10 wt%

[0028] Low coalification coal with Rmax of 0.8% 20 wt%

[0029] Medium coalification coal with Rmax of 1.0% 30 wt%

[0030] 40 wt% medium coalification coal with Rmax of 1.3%;

[0031] B. After the non-coking anthracite in step A is crushed until more than 98% of the particle size is less than 1mm, it is uniformly mixed with the rest of the raw coal to obtain: Rmax is 1.25%, volatile matter is 26.0 wt%, ash is 14wt%, and caking Coal blend with an index of 67, a final shrinkage of 37mm, and a maximum expansion of the colloidal layer of 14.0:

[0032] C. Send the mixed coal of step B to a conventional 5.5-meter tamping coke oven. Under the condition that the central temperature is 990°C, the pressure of the fire hole is 6pa, the pressure of the air collecting pipe is 102pa, and the suction of the branch flue is 248pa, coking for 26 hours, th...

Embodiment 3

[0034] A. Prepare materials according to the following proportions:

[0035] Non-coking anthracite with Rmax of 2.5% 15 wt%

[0036] Low coalification coal with Rmax of 0.6% 25 wt%

[0037] Medium coalification coal with Rmax of 0.9% 25 wt%

[0038] Rmax is 1.3% medium coalification degree coal 35 wt%;

[0039] B. After the non-coking anthracite in step A is crushed until more than 98% of the particle size is less than 1mm, it is uniformly mixed with the remaining raw coals to obtain: Rmax is 1.35%, volatile content is 22.0 wt%, ash content is 15 wt%, caking Coal blend with an index of 65, a final shrinkage of 35mm, and a maximum expansion of the colloidal layer of 13.5:

[0040] C. Send the mixed coal of step B to a conventional 5.5-meter tamping coke oven. Under the condition that the central temperature is 1050°C, the pressure of the fire hole is 10pa, the gas collecting pipe pressure is 120pa, and the suction of the branch flue is 255pa, after coking for 25...

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Abstract

The invention provides a method for coking with non-coking blind coal. The method includes mixing 5-15wt% of non-coking blind coal with Rmax ranging from 2.0% to 2.5%, 15-25wt% of coal with Rmax ranging from 0.6% to 0.9%, 25-35wt% of coal with Rmax ranging from 0.9% to 1.2% and 35-45wt% of coal with Rmax ranging from 1.2% to 1.5% uniformly; feeding the above raw materials into a coke tamping furnace, coking for 25-28 hours under conditions that machine-side temperature ranges from 1325 DEG C to 1335 DEG C, coke-side temperature ranges from 1330 DEG C to 1350 DEG C, coke cake center temperature ranges from 950 DEG C to 1050 DEG C, pressure of an observation hole ranges from 4Pa to 10Pa, pressure of a gas collector pipe ranges from 95Pa to 120Pa and suction force of a flue distribution duct ranges from 235Pa to 255Pa, and obtaining cokes meeting requirements of a blast furnace for iron making. By the method for coking with non-coking blind coal, resources of coking coal are enriched, and the problem that coke quality is rapidly deteriorated due to non-coking blind coal is effectively solved.

Description

technical field [0001] The invention relates to a coking method, in particular to a coking method in which non-coking anthracite is blended, and belongs to the technical field of coking, stamping and coking. Background technique [0002] With the rapid development of the coking industry, the supply of coking coal is becoming increasingly tight and expensive. Coking coal in the traditional sense is generally bituminous coal. Therefore, whether anthracite can be used to participate in coal blending and coking based on the production advantages of a large-volume 5.5-meter tamping coke oven has become the key to expanding coking coal resources, reducing costs and increasing benefits. At the same time, anthracite is a non-coking coal with high coalification degree, high carbon content, low volatile matter and no caking, and neither melts nor shrinks during the coking process. If used improperly, it will have a devastating impact on the quality of coke, especially the strength i...

Claims

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Application Information

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IPC IPC(8): C10B57/04
Inventor 龙建新张明龙菊兴陈朝辉唐宁生陈四利陶汝佩
Owner YUNNAN COAL & ENERGY
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