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Waterproof pulverized coal and preparation method thereof

A technology of pulverized coal and stearic acid, applied in the field of pulverized coal, can solve the problems of limited storage time, transportation mode and application field of pulverized coal, affecting the use of coal-water slurry, shortening the storage time, etc. Good performance and waterproof performance

Active Publication Date: 2015-11-18
重庆四季金标科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the hydrophilicity of coal powder, the existing fine coal powder is easy to absorb moisture during storage and transportation, and it is not waterproof, so the storage time for coal powder to maintain properties is shortened, and usually only Store for about 1 day
At the same time, the volatile matter in the pulverized coal is easy to volatilize during storage and transportation, and the precipitation of these volatile matter will cause the pulverized coal to spontaneously ignite
The above disadvantages of pulverized coal make the storage time, transportation mode and application field of pulverized coal very limited.
Moreover, due to the water-absorbing and moisture-absorbing characteristics of coal powder, when the coal powder is in an aqueous solution, it will absorb the water in the solution, which will lead to a decrease in the concentration of coal powder in the coal-water slurry during the production process of coal-water slurry, affecting The use of coal water slurry

Method used

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  • Waterproof pulverized coal and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 A kind of waterproof pulverized coal and preparation method thereof

[0017] 1. A waterproof coal powder, consisting of the following components by weight: CaCO 3 10 parts, 1 part of stearic acid, and 89 parts of pulverized coal with a particle size of 90 mesh.

[0018] 2. A preparation method of waterproof pulverized coal:

[0019] 1) Weigh the raw materials according to the above formula;

[0020] 2) After mixing and stirring the above-mentioned weighed raw materials evenly, add them to the drum-type heating reaction kettle, and after heating up to 110°C, keep rolling and heating for 20 minutes to obtain the waterproof coal powder; wherein, the heating rate of the heating is 2°C / min.

[0021] According to the method of DB51 / 172-1993, the above-mentioned waterproof pulverized coal prepared in the present embodiment was tested for performance. The results showed that the waterproof pulverized coal produced in the present embodiment had a water-repellent...

Embodiment 2

[0022] Embodiment 2 A kind of waterproof pulverized coal and preparation method thereof

[0023] 1. A waterproof coal powder, consisting of the following components by weight: CaCO 3 10 parts, 1 part of stearic acid, 89 parts of pulverized coal with a particle size of 90 mesh and 0.5 part of paraffin;

[0024] 2. A preparation method of waterproof pulverized coal:

[0025] 1) Weigh the raw materials according to the above formula;

[0026] 2) After mixing and stirring the above-mentioned weighed raw materials evenly, add them to the drum-type heating reaction kettle, and after heating up to 110°C, keep rolling and heating for 20 minutes to obtain the waterproof coal powder; wherein, the heating rate of the heating is 2°C / min.

[0027] According to the method of DB51 / 172-1993, the above-mentioned waterproof pulverized coal prepared in this embodiment was tested for performance, and the results showed that the water-repellent rate of the waterproof pulverized coal prepared ...

Embodiment 3

[0028] Embodiment 3 A kind of waterproof pulverized coal and preparation method thereof

[0029] 1. A waterproof coal powder, consisting of the following components by weight: 5 parts of CaCO 3 , 5 parts of calcium stearate, 60 parts of coal powder with a particle size of 60 mesh and 1 part of paraffin.

[0030] 2. A preparation method of waterproof pulverized coal:

[0031] 1) Weigh the raw materials according to the above formula;

[0032] 2) After mixing and stirring the above-mentioned weighed raw materials evenly, add them to the rolling heating reaction kettle, and after raising the temperature to 130°C, keep rolling and heating for 40 minutes to obtain the waterproof coal powder; wherein, the heating rate of the heating is 1°C / min.

[0033] According to the method of DB51 / 172-1993, the above-mentioned waterproof pulverized coal prepared in this embodiment was tested for performance, and the results showed that the water-repellent rate of the waterproof pulverized c...

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Abstract

The invention discloses a waterproof pulverized coal and a preparation method thereof, wherein the waterproof pulverized coal comprises components with parts by weight: calcium salt or calcium hydroxide (Ca(OH)2) 5-30 parts, stearic acid or stearate 1-10 parts or pulverized coal 60-94 parts. The method for preparing the waterproof pulverized coal comprises steps: firstly, the components with parts by weight are weighted, are added into a roller type reaction kettle to be kept to heat for 20-60 min after being heated to 110-140 DEG C, thereby obtaining the waterproof pulverized coal. The method for preparing the waterproof pulverized coal can convert pulverized coal to be a hydrophobic substance from a hydrotropic substance, greatly reduces hydrophilic performance of the pulverized coal, and can prevent volatile components in the pulverized coal from volatilizing, thereby preventing the autoignition problem of the pulverized coal during storing, prolonging service life, improving safety during storage and transportation, and having excellent application prospect.

Description

technical field [0001] The invention belongs to the technical field of coal powder, and in particular relates to a waterproof coal powder and a preparation method thereof. Background technique [0002] Pulverized coal is an important fuel, which has been widely used in thermal energy supply of thermal power plants and industrial boilers. However, due to the hydrophilicity of coal powder, the existing fine coal powder is easy to absorb moisture during storage and transportation, and it is not waterproof, so the storage time for coal powder to maintain properties is shortened, and usually only Store for about 1 day. At the same time, the volatile matter in the pulverized coal is easy to volatilize during storage and transportation, and the precipitation of these volatile matter will cause the pulverized coal to spontaneously ignite. The above disadvantages of pulverized coal make the storage time, transportation mode and application field of pulverized coal very limited. ...

Claims

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Application Information

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IPC IPC(8): C10L5/06C10L5/04
Inventor 郑宇松周翰郑翔书范希锐
Owner 重庆四季金标科技有限公司
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