Coking method for improving lumpiness of tamping coke and tamping coke prepared by same

A technology of tamping coke and fineness, which is applied in coke ovens, special forms of dry distillation, petroleum industry, etc., and can solve problems such as the inability to make full use of tamping coke to reduce costs, coke production decline, coke pushing difficulties, production accidents, etc.

Active Publication Date: 2021-11-05
河北中煤旭阳能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the advantage of tamping coke itself is to make more use of weakly caking coal and highly volatile coal to reduce costs, therefore, adjusting coal blending to increase the coke lumpiness will not be able to take advantage of the cost reduction advantages of tamping coke, and reduce the cost of weak caking coke. Caking coal and highly volatile coal with coking coal and fat coal will cause excessive expansion pressure of the coal material

Method used

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  • Coking method for improving lumpiness of tamping coke and tamping coke prepared by same
  • Coking method for improving lumpiness of tamping coke and tamping coke prepared by same
  • Coking method for improving lumpiness of tamping coke and tamping coke prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1: prepare coking blending coal according to conventional method as furnace coal (determining blending coal index is: Mt is 11.8%, V daf G is 29.3%, G is 68, Y is 12.5mm, X is 46mm; the crushing fineness (the proportion less than 3mm) is 89.2%, of which the proportion of 0.5-3mm accounts for 48%; the tamping bulk density is 1.02t / m 3 ; the coking time is 22.5 hours, the machine-measured standard temperature is 1330°C, and the coke side standard temperature is 1350°C), and the coking blend coal is pounded into a coal cake slightly smaller than the size of the carbonization chamber with a tamping machine in the coal box, and then The briquettes are stamped and coked in the carbonization chamber under the actual coking time, coking rate and actual heating standard temperature determined by the following method, and finally the coke is quenched by wet method.

[0061] In this embodiment, a 4.3-meter stamped coke oven is used: the width of the carbonization chambe...

Embodiment 2

[0074] Embodiment 2: Coal blending coking is carried out in the same procedure as in Embodiment 1, the difference is that a 5.5-meter tamping coke oven is used: the width of the carbonization chamber is 550 mm, the width of the briquette is 500 mm, and the blending coal index is: Mt is 11.3% , V daf G is 28.8%, G is 67, Y is 12.8mm, X is 43mm; the crushing fineness (the proportion less than 3mm) is 88.2%, of which the proportion of 0.5-3mm accounts for 46%; the tamping bulk density is 1.06t / m 3 ; The coking time is 25.5 hours, the standard temperature of the machine test is 1320°C, the standard temperature of the coke side is 1340°C, and the coke is quenched by dry method.

[0075] Based on the above blended coal indicators, the coking conditions are determined as follows:

[0076] (1) Determine the reasonable actual coking time T 实 :

[0077] According to the volatile content of coal into the furnace V daf 28.8% belong to 28.5% daf <30%, a value is 1 hour;

[0078] Accor...

Embodiment 3

[0088]Example 3: The same procedure as in Example 1 is used for coal blending and coking, except that a 6.25-meter tamping coke oven is used: the width of the carbonization chamber is 540 mm, the width of the briquette is 480 mm, and the index of blending coal is: Mt is 12.3% , V daf G is 27.5%, G is 70, Y is 13.0mm, X is 40mm; crushing fineness (ratio of less than 3mm) is 89.5%, of which 0.5-3mm accounts for 48%; tamping bulk density is 1.04t / m 3 ; The coking time is 25 hours, the standard temperature of the machine test is 1330°C, the standard temperature of the coke side is 1370°C, and the coke is quenched by dry method.

[0089] Based on the above blended coal indicators, the coking conditions are determined as follows:

[0090] (1) Determine the reasonable actual coking time T 实 :

[0091] According to the volatile content of coal into the furnace V daf 27.5% fall under 26% ≤ V daf ≤28.5%, a value is 0 hours;

[0092] According to the moisture Mt of coal entering th...

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Abstract

The invention provides a coking method for improving lumpiness of tamping coke and the tamping coke prepared by the method. According to the method, the coking time, the coking rate and the heating standard temperature in the tamping coking process are adjusted according to the actual index of as-fired coal relative to a reference index and a coke quenching mode, so that the lumpiness of the tamping coke is improved. According to the method, the lumpiness of the tamping coke can be improved, the method is also suitable for coking production of tamping coke ovens of any furnace type, the phenomenon of difficult coke pushing does not exist in coking production, and the wall of the coke oven cannot be damaged.

Description

technical field [0001] The invention belongs to the field of coking in the coking industry, and in particular relates to stamped coke and a production process thereof. Background technique [0002] One of the main functions of coke on blast furnace ironmaking is the skeleton effect of the furnace charge. Only an appropriate average particle size of coke can ensure the stable and high production of the blast furnace. The larger the type of blast furnace and the higher the coal injection ratio, the higher the requirements for coke particle size and strength. Due to the substantial increase in the bulk density of coal materials and the addition of a large proportion of high-volatility coal in rammed coke, the cracks of the coke cake increase, so that most of the coke is slender, the large coke larger than 60mm is reduced, and the coke smaller than 40mm The proportion of small focal blocks is increased. Therefore, one of the main restrictive factors for the application of tamp...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B45/02
CPCC10B53/04C10B45/02
Inventor 任华伟李浩伟路利宾郎莹于守立杨磊赵小欣郝力平张青青刘艳辉姜坤马江涛冯强申梦栖张文钰
Owner 河北中煤旭阳能源有限公司
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