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Composite adhesive for molding coal powder and method for preparing molded coal

A binder and cohesive coal technology, applied in the petroleum industry, solid fuel, fuel, etc., can solve the problems of high content of harmful impurities, unsuitable for industrial application, complex preparation process, etc., and achieve low price, low cost, The effect of simple preparation process

Pending Publication Date: 2016-08-10
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binders play a key role in the production of coal briquettes, but currently the binders used in the market and the process of preparing molded coke using binders have complex preparation processes, high production costs, high content of harmful impurities, and Suitable for many shortcomings such as industrial applications

Method used

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  • Composite adhesive for molding coal powder and method for preparing molded coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Raw materials: long-flame coal powder, coke powder, boron oxide or boron powder, quicklime, caking coal.

[0041] The long-flame coal powder with a particle size distribution of less than 100 mesh accounts for 63.5% of its total mass.

[0042] Form coke preparation steps:

[0043] Step 1, mix 1000g of long-flame coal, 30g of coke powder, 1100g of quicklime, 10g of boron oxide, and 300g of Datong coal for 15 minutes to obtain a mixture;

[0044] Step 2, put the mixture into the molding equipment and press it under the pressure of 13Mpa;

[0045] Step 3, heating the compressed mixture in a preheating furnace at 650° C. for 60 minutes to perform pyrolysis treatment.

[0046] The average compressive strength of the raw briquettes obtained above before pyrolysis is 392N / ball, the average drop strength is 41 times / ball, and the 2-meter steel plate drop M5 reaches 87.54%; the average compressive strength after pyrolysis is 710N / ball, and the average drop strength is more tha...

Embodiment 2

[0049] Raw materials: long-flame coal powder, coke powder, boron oxide or boron powder, quicklime, caking coal.

[0050] The long-flame coal pulverized coal particle size distribution below 100 mesh accounts for 74.9% of its total mass.

[0051] Form coke preparation steps:

[0052] Step 1, mix 1000g of long-flame coal, 50g of coal tar, 1100g of quicklime, 15g of boron powder, and 400g of Datong coal for 15 minutes to obtain a mixture;

[0053] Step 2, put the mixture into the molding equipment and press it under the pressure of 13Mpa;

[0054] Step 3, heating the compressed mixture in a preheating furnace at 650° C. for 60 minutes to perform pyrolysis treatment.

[0055] The average compressive strength of the raw briquettes obtained above before pyrolysis is 644N / ball, the average drop strength is 42 times / ball, and 90.12% of the 2-meter steel plate falls M5; the average compressive strength after pyrolysis is 1053N / ball, and the average drop strength is more than 45 times...

Embodiment 3

[0058] Raw materials: long-flame coal powder, coke powder, boron oxide or boron powder, quicklime, caking coal.

[0059] Its particle size distribution below 100 mesh accounts for 34.9% of its total mass.

[0060] Form coke preparation steps:

[0061] Step 1, mix 1000g of long-flame coal, 100g of coal tar, 1100g of quicklime, 20g of boron powder, and 400g of Datong coal for 15 minutes to obtain a mixture;

[0062] Step 2, put the mixture into the molding equipment and press it under the pressure of 13Mpa;

[0063] Step 3, heating the compressed mixture in a preheating furnace at 650° C. for 60 minutes to perform pyrolysis treatment.

[0064] The average compressive strength of the raw briquettes obtained above before pyrolysis is 534N / ball, the average drop strength is 41 times / ball, and the 2-meter steel plate drop M5 reaches 88.75%; the average compressive strength after pyrolysis is 896N / ball, and the average drop strength is more than 45 times / ball 97.22% of the 2-meter...

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Abstract

The invention discloses a composite binder for forming coal powder, which comprises the following components: 20-50wt% of coke powder, 10-50wt% of coal tar, 5-20wt% of quicklime, 2-10wt% of diboron trioxide or boron powder , 5-30wt% caking coal. The invention also discloses a method for preparing molded coal, which includes the following steps: (1) stirring the long-flame coal and the composite binder evenly to obtain a mixture; (2) putting the mixture into a molding device and pressing it into shape; (3) ) Pyrolytic treatment of the compressed mixture. The composite binder disclosed in the present invention has good thermal stability, wide sources of ingredients, low cost, no harmful impurities, and can also realize waste recycling; the method for preparing briquettes disclosed in the present invention is simple and wide in application It is suitable for large-scale production, and the obtained briquettes have high pyrolysis strength, compressive strength and drop strength, which can meet the needs of subsequent production.

Description

technical field [0001] The invention belongs to the fields of coal chemical industry and calcium carbide production, and in particular relates to a coal powder forming composite binder and a method for preparing molded coal. Background technique [0002] Coal briquettes are coal products with certain strength, size and shapes that are pressed and formed with pulverized coal as the main raw material, according to the ratio, mechanical strength and shape required by the specific use. As a solid fuel, briquette can not only improve combustion efficiency, but also use industrial waste and agricultural waste as binders, turning waste into treasure and reducing SO 2 , NO 2 , Solid dust emissions. Binders play a key role in the production of coal briquettes, but currently the binders used in the market and the process of preparing molded coke using binders have complex preparation processes, high production costs, high content of harmful impurities, and It is suitable for many d...

Claims

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Application Information

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IPC IPC(8): C10L5/10C10L5/02
CPCC10L5/105C10L5/02
Inventor 邓鑫夏碧华薛逊吴道洪
Owner SHENWU TECH GRP CO LTD
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