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A coal gangue combustion aid

A technology of combustion accelerant and coal gangue, which is applied in the field of coal gangue combustion accelerant, can solve the problems of low utilization rate of coal gangue, low heat production efficiency, long duration, etc., and achieves the effects of increasing heat, improving combustion efficiency and shortening combustion time.

Inactive Publication Date: 2017-03-01
HUNAN JINHUA SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some common coal-fired combustion aids can also help coal gangue to burn (usually coal gangue powder, raw coal powder and coal-fired combustion aids are mixed together in a certain proportion, and then the mixture is ignited and burned), but this type of coal-fired Most of the combustion aids have the following defects in the actual use process: 1. The combustion process lasts too long, and the heat released per unit time is too low
2. The heat production efficiency is low during the combustion process, and the utilization rate of coal gangue is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0008] As an embodiment of the present invention, a coal gangue combustion accelerant, the weight ratio of its components is: potassium perborate: 30-32%, manganese dioxide: 2%, calcium propionate: 4-5%, Lanthanum nitrate: 13-15%, iron oxide: 1%, bentonite: 3-3.5%, sodium chloride: 29-39%, and the balance is water.

[0009] What needs to be explained in advance is that due to the wide variety of coal-fired combustion-supporting agents currently on the market, the effects of existing coal-burning combustion-supporting agents are not ideal when used for coal gangue combustion-supporting, and the effects of different coal-burning combustion-supporting agents are also different. It is not particularly obvious, so the present invention chooses the "Yitaiyi" brand "TF coal-fired combustion aid" produced by Langfang Yitai Chemical Building Materials Co., Ltd. with better market sales as a comparative example.

[0010] The present invention will be further described below in conjuncti...

Embodiment 1

[0012] First, under normal temperature and pressure, put each component in the enamel stirring tank according to the following weight ratio, and then stir and mix them evenly to obtain the coal gangue combustion accelerant of this embodiment. The weight proportion of each component is:

[0013] Potassium perborate: 30%, manganese dioxide: 2%, calcium propionate: 4%, lanthanum nitrate: 13%, iron oxide: 1%, bentonite: 3%, sodium chloride: 29%, and the balance is water .

[0014] Thereafter, the prepared coal gangue combustion improver is mixed into raw coal powder and coal gangue powder for combustion test. The specific test process includes the following steps: first, the raw coal and gangue are crushed to 150-200 meshes respectively. In the second step, the pulverized raw coal powder, coal gangue powder and coal gangue combustion accelerant are uniformly mixed in a weight ratio of 1:1:0.02 to obtain a raw coal-coal gangue-combustion accelerant mixture. In the third step, the...

Embodiment 2

[0018] Embodiment 2 is compared with embodiment 1, only the weight ratio of each component changes, and other contents are identical, and the weight ratio of each component of embodiment 2 is as follows:

[0019] Potassium perborate: 32%, manganese dioxide: 2%, calcium propionate: 5%, lanthanum nitrate: 15%, iron oxide: 1%, bentonite: 3.5%, sodium chloride: 39%, and the balance is water .

[0020] Thereafter, the coal gangue combustion improver prepared in Example 2 was mixed into raw coal powder and coal gangue powder for combustion test. The specific test process included the following steps: first step, the raw coal and gangue were crushed to 150-200 mesh respectively. In the second step, the pulverized raw coal powder, coal gangue powder and coal gangue combustion accelerant are uniformly mixed in a weight ratio of 1:1:0.02 to obtain a raw coal-coal gangue-combustion accelerant mixture. In the third step, the mixture obtained in the above second step is subjected to a wat...

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PUM

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Abstract

The invention provides a gangue combustion improver and relates to the technical field of industrial combustion improvers. The gangue combustion improver comprises the following ingredients by weight percentage: 30-35% of potassium perborate, 2% of manganese dioxide, 4-7% of calcium propionate, 13-17% of lanthanum nitrate, 1% of ferric oxide, 3-4% of bentonite, 29-44% of sodium chloride and the balance of water. Compared with a fire coal assistant in the prior art, the combustion velocity of a mixture of raw coal and gangue can be increased to a great extent; heat generated in unit time is more in a combustion process; the combustion efficiency of the mixture is extremely high; and a utilization ratio of the gangue is greatly increased.

Description

technical field [0001] The invention relates to the technical field of industrial combustion accelerants, in particular to a coal gangue combustion accelerant. Background technique [0002] my country's coal mines produce a large amount of coal gangue every year. Except for a small part of these coal gangues used for pyrite recovery, power generation, and production of Portland cement and bricks and other building materials, most of them are piled up into coal gangue hills, which not only occupy land And because there are still some combustibles in coal gangue, it will cause spontaneous combustion under certain conditions and produce SO 2 , NO, NO 2 Toxic and harmful gases pollute the environment. [0003] There are a lot of reports about coal combustion accelerant technology and corresponding products, but most of those are for raw coal, and there is no combustion accelerant specifically for coal gangue on the market at present. Although some common coal-fired combustion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10
Inventor 许峻豪
Owner HUNAN JINHUA SCI & TECH GRP
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