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Coking coal quality improving device and quality improving method

A technology for improving the quality of coal, applied in the direction of grain processing, etc., can solve the problem of not being able to effectively adapt to the requirements of fine-grain and fine-grain sorting and quality improvement of coal in coking, and achieve flexible assembly, easy operation, production and assembly. the effect of

Inactive Publication Date: 2017-02-08
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lower limit of the particle size of the applicable materials for the existing dry separation technology is still unable to effectively meet the requirements for separation and quality improvement of fine and fine coal particles in coking.

Method used

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  • Coking coal quality improving device and quality improving method
  • Coking coal quality improving device and quality improving method
  • Coking coal quality improving device and quality improving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 A coal upgrading device for coking is shown, including a quality upgrading mechanism and a wind mechanism;

[0032] The quality improvement mechanism includes a screw feeder 2, a jet mill 3, a primary classifier 4, a secondary classifier 5, a cyclone separator 6 and a bag filter 7 connected in sequence through pipelines. The feeding port of machine 2 is connected with hopper 1;

[0033] The wind mechanism includes a balance tank 12, an air compressor 13, a cold dryer 14, an air storage tank 15 and a distribution valve 16 connected in sequence through pipelines, and the distribution valve 16 is connected to the airflow pulverizer 3 and a The primary classifier 4, the secondary classifier 5 are connected to the bag filter 7, and the bag filter 7 is connected to the balance tank 12 through pipelines.

[0034] Such as figure 1 As shown, the primary classifier 4 is connected to the primary classified product storage tank 8, the secondary classifier 5 is c...

Embodiment 2

[0040] combine figure 1 In this embodiment, the method for upgrading coking medium coal by means of the device described in Example 1 comprises the following steps:

[0041] Step 1, using a jaw crusher to crush the coking medium coal, and then screening the crushed coking medium coal to obtain coking medium coal powder with a particle size of less than 0.125mm;

[0042] Step 2. Add the coking medium coal powder described in step 1 at 84g / min, with a fixed feed rate of 300g each time, into the quality upgrading structure from the hopper 1, and use the wind mechanism to wind the coking medium coal powder. Pushing, the crushing pressure of the jet mill 3 is 0.5MPa, the classification speed of the primary classifier 4 is 6000r / min, and the classification speed of the secondary classifier 5 is 18000r / min, and the quality improvement operation is carried out for 5min to 10min. Finally, the upgraded coking medium coal powder is obtained.

[0043] In this embodiment, the coking coal...

Embodiment 3

[0046] combine figure 1 In this embodiment, the method for upgrading coking medium coal by means of the device described in Example 1 comprises the following steps:

[0047] Step 1, using a jaw crusher to crush the coking medium coal, and then screening the crushed coking medium coal to obtain coking medium coal powder with a particle size of less than 0.125mm;

[0048]Step 2. Add the coking medium coal powder described in step 1 at 84g / min, with a fixed feed rate of 300g each time, into the quality upgrading structure from the hopper 1, and use the wind mechanism to wind the coking medium coal powder. Pushing, the crushing pressure of jet mill 3 is 0.5MPa, the classification speed of primary classifier 4 is 5600r / min, and the classification speed of secondary classifier 5 is 18000r / min, and the quality improvement operation is carried out for 5min~10min. Finally, the upgraded coking medium coal powder is obtained.

[0049] In this embodiment, the coking coal powder after up...

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Abstract

The invention provides a coking coal quality improving device. The coking coal quality improving device comprises a quality improving mechanism and a wind power mechanism; the quality improving mechanism comprises a spiral feeding machine, a jet mill, a primary grading machine, a secondary grading machine, a cyclone separator and a bag-type dust collector; the wind power mechanism comprises a balance tank, an air compressor, a refrigeration dryer, a gas storage tank and a distribution valve; the distribution valve is connected with each of the jet mill, the primary grading machine, the secondary grading machine and the bag-type dust collector; the bag-type dust collector is connected with the balance tank. The invention also provides a method for improving the quality of coking coal by utilizing the device. The coking coal quality improving device is scientific and reasonable in design; the problems of deficiencies of sorting by a wet method and high lower limit of the particle size of a conventional dry method sorting technology can be effectively solved; finally, the quality of the coking coal is improved and graded; the coking coal quality improving device is wide in application field, and is suitable for popularization and use.

Description

technical field [0001] The invention belongs to the technical field of coal mine quality improvement and quality separation, and in particular relates to a coal quality device and a quality improvement method for coking. Background technique [0002] Coking coal and fat coal are indispensable raw materials for the coking industry, but the amount of resources is only 9.4% of the reserves of coal, which is a scarce coal in my country. About half of this scarce coal resource is difficult to develop and utilize due to the high content of impurities such as sulfur. Other rare low-sulfur and high-ash coals will produce about 20% medium coal during the sorting process. The ash content of this part of medium coal is generally around 35%, which is a typical low-quality coal. At this stage, my country is targeting this part of coking medium coal It is mainly used directly as fuel, which causes a huge waste of scarce coking coal resources and environmental pollution. However, most of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C23/18
CPCB02C21/00B02C23/18
Inventor 李振付艳红周安宁杨超
Owner XIAN UNIV OF SCI & TECH
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