Production process of coke by preheating coal and stacking

A production process and stacking technology, which is applied in the field of preheating coal stacking coke production process, can solve the problems of increasing cost, wasting energy, increasing moisture, etc., and achieve the effects of increasing the initial temperature of dry distillation and shortening the coking time.

Inactive Publication Date: 2017-11-28
山西博嘉慧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the steps of water soaking and boiling in the above technical scheme, the moisture in the coal will increase a lot, and an additional drying step will be carried out, which wastes energy and increases the cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preheated coal stacking coke production process, comprising the following steps:

[0045] 1) Pretreatment: Preheat the coal materials respectively, preheat the caking coal to 200-300°C, preheat the weakly caking coal to 250-380°C, pulverize the above coal materials, and press the caking coal , Coal blending ratio of 50% by weight of weakly cohesive coals, weighing the corresponding pulverized coal materials without adding binders and mixing to obtain raw coal, the particle size of the pulverized coal materials is less than 2mm;

[0046] 2) Molding: The raw coal is hot-pressed to obtain molded coal, the compression ratio of hot-pressed molding is greater than 2:1, the forming pressure is greater than 20MPa, and the density of hot-pressed molded coal obtained is ≥ 1.25 tons / m 3 ;

[0047] 3) Palletizing: Palletize the briquettes into a coal wall and put them on the coal dragging plate of the coal loading truck, and one side is blocked by the coal dragging baffle. The ...

Embodiment 2

[0052] A preheated coal stacking coke production process, comprising the following steps:

[0053] 1) Pretreatment: Preheat the coal materials respectively, preheat the caking coal to 200-300°C, preheat the weakly caking coal to 250-380°C, pulverize the above coal materials, and press the caking coal , Coal blending ratio of 50% by weight of weakly cohesive coal, weighing corresponding pulverized coal material and adding binder and mixing to obtain raw coal, the particle size of pulverized coal material is less than 2mm;

[0054] 2) Molding: The raw coal is hot-pressed to obtain molded coal, the compression ratio of hot-pressed molding is greater than 2:1, the forming pressure is greater than 20MPa, and the density of hot-pressed molded coal obtained is ≥ 1.25 tons / m 3 ;

[0055] 3) Palletizing: Palletize the briquettes into a coal wall and put them on the coal dragging plate of the coal loading truck, and one side is blocked by the coal dragging baffle. The coal wall is loa...

Embodiment 3

[0060] Taking the existing 5.5-meter tamping coke oven as an example, carry out transformation, and the target annual output will increase by 200,000 tons:

[0061] 1) Calculation of preheated briquette forming machine

[0062] Molding machinery is the key equipment for production, which has a great influence on the production efficiency and quality of products. According to the requirements of this process, hot press molding equipment with large production capacity is required.

[0063] This design requires 60 holes to be filled with briquettes per day, each hole requires 1330 pieces of briquettes, and the daily working hours are 21 hours, that is, the briquettes required per hour are:

[0064] N 0 =(60×1330)÷21=3800 pieces

[0065] The model of the selected press is SKM600-6B, the rated pressure is 31.5MPa, and a single piece of equipment can produce 1 piece of briquette in an average of 7 seconds, that is, each machine can produce briquette per hour

[0066] n=3600÷7=51...

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Abstract

The invention relates to a production process of coke by preheating coal and stacking. The production process comprises the following steps of pretreatment: preheating and crushing a coal material according to the property of a coal type, and then weighing and taking the corresponding crushed coal material according to a coal proportion, adding or not adding a binder, and then mixing to obtain raw-material coal; molding: carrying out hot press molding on the raw-material coal to obtain molded coal; stacking: stacking the molded coal to be a coal wall, and laterally loading into a vertical coke oven; coking: carrying out dry distillation in the vertical coke oven; coke quenching: pushing the coke into a coke quenching car, screening and storing after the coke quenching, and carrying out recovery treatment on coal gas generated during the dry distillation. According to the technical scheme of the production process, the viscosity of the coal is effectively improved through preheating the coal; the use level of weak caking coal can be increased by 45 percent or above; the density of the weak caking coal is improved by adopting a hot molding technique; the coking time can be greatly shortened; the initial temperature of the dry distillation can be effectively improved, the generation of coking wastewater is reduced and the quality of the coal gas is improved by preheating the coal entering the oven and the production process is used for realizing energy-saving and environment-friendly effects through recovering the sensible heat of the generated coal gas.

Description

technical field [0001] The invention belongs to the technical field of coal coking, and in particular relates to a preheating coal stacking coke production process. Background technique [0002] Coke is finally made by heating bituminous coal to a certain temperature under the condition of isolation from air, and going through stages of drying, pyrolysis, melting, bonding, solidification, and shrinkage. This process is called high-temperature coking (high-temperature dry distillation). Coke obtained from high temperature coking can be used in blast furnace smelting, casting and gasification. The recovered and purified coke oven gas produced in the coking process is not only a fuel with high calorific value, but also an important industrial raw material for organic synthesis. Coke is mainly used in blast furnace ironmaking and blast furnace smelting of non-ferrous metals such as copper, lead, zinc, titanium, antimony, mercury, etc., and acts as a reducing agent, heating agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/00
CPCC10B53/04C10B57/00
Inventor 姚润生
Owner 山西博嘉慧科技有限公司
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