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Coal gangue-based industrial environment-friendly coal

A technology for coal gangue and base industry, which is applied in the field of environmental protection briquette of coal gangue base industry, can solve the problem of high cost of briquette, and achieve the effects of low price, cost reduction and wide source.

Pending Publication Date: 2021-08-31
宁夏亘峰嘉能能源科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the content of coal gangue and coal slime in briquettes is low, and the mass percentage is less than 30%. For example, the patent application number 202010922927.6 discloses a method for preparing industrial briquettes from combustible solid waste, using coal gangue and coal slime as raw materials , but 50-70% of crushed coal is added, the amount of coal gangue and coal slime is less, and the cost of briquette is high

Method used

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  • Coal gangue-based industrial environment-friendly coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Crush 25kg of coal gangue, 30kg of coal slime and 40kg of raw coal to a particle size of 60-80 mesh, and stir to mix, then add 3kg of 80-120-mesh straw powder, 1.5kg of polyvinyl alcohol and 0.5kg of ferric oxide and stir Mix, and finally add 10kg of boiling water and knead;

[0041] (2) Put the briquette raw material uniformly kneaded into the forming machine, extrude under 24MPa pressure to obtain oval briquettes, and dry at 120° C. for 6 hours to obtain the briquette product.

Embodiment 2

[0043] (1) Crush 15kg of coal gangue, 40kg of coal slime and 30kg of raw coal to a particle size of 60-80 mesh, and stir and mix, then add 2kg of 80-120 mesh straw powder, 1kg of polyvinyl alcohol and 0.5kg of ferric oxide and stir and mix , and finally add 95°C 8kg hot water and knead;

[0044] (2) Put the briquette raw material uniformly kneaded into the forming machine, extrude under 26MPa pressure to obtain oval briquettes, and dry at 130° C. for 5.5 hours to obtain the briquette product.

Embodiment 3

[0046] (1) Crush 35kg of coal gangue, 20kg of coal slime and 50kg of raw coal to a particle size of 60-80 mesh, and stir and mix, then add 4kg of 80-120 mesh straw powder, 2kg of polyvinyl alcohol and 0.5kg of ferric oxide and stir and mix , and finally add 15kg of boiling water and knead;

[0047] (2) Put the briquette raw material uniformly kneaded into the molding machine, extrude under 28MPa pressure to obtain oval briquettes, and dry at 150° C. for 4.5 hours to obtain the briquette product.

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Abstract

The invention discloses coal gangue-based industrial environment-friendly coal which comprises the following raw materials in percentage by weight: 15-35% of coal gangue, 20-40% of coal slime, 30-50% of raw coal, 2-4% of straw powder, 1-2% of polyvinyl alcohol and 0.5% of ferric oxide. The invention also discloses a preparation method of the coal gangue-based industrial environment-friendly coal, which comprises the following steps: (1) crushing the coal gangue, the coal slime and the raw coal until the particle size is 60-80 meshes, conducting stirring and mixing, then adding the straw powder, the polyvinyl alcohol and the ferric oxide, conducting stirring and mixing, and finally adding hot water for mixing and kneading; and (2) adding the briquette raw material formed by uniform mixing and kneading into a forming machine, then carrying out extrusion forming to obtain elliptical briquettes, and conducting drying to obtain a briquette product. According to the industrial environment-friendly coal prepared by the invention, wastes can be utilized to the greatest extent, the cost of the briquette coal is further reduced, and meanwhile, the prepared briquette coal is high in strength and high in coal saving rate.

Description

technical field [0001] The invention relates to the technical field of shaped coal, in particular to a gangue-based industrial environment-friendly shaped coal. Background technique [0002] Coal gangue is an "industrial waste" with three hazards of solid, liquid and gas. Its long-term stacking not only wastes resources, occupies a large amount of land, but also pollutes water sources, soil and the surrounding air. In order to utilize coal gangue, gangue-based briquettes in which gangue replaces part of the raw coal have been gradually developed. After the flue gas produced by the combustion of briquettes is recovered by waste heat, and desulfurized, denitrated, mercury and dust removed by the moving bed, the flue gas can be discharged cleanly. It is not only conducive to expanding the comprehensive utilization of coal gangue, improving the clean and efficient utilization of coal resources, but also helping to minimize the adverse impact of coal gangue stacking and coal com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/48C10L5/04C10L10/00
CPCC10L5/48C10L5/04C10L10/00
Inventor 郝宝玉吴志玲崔焕武施园园付秀云吴立攀
Owner 宁夏亘峰嘉能能源科技股份有限公司
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