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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  • 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
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Method used

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  • Waterproof pulverized coal and preparation method thereof

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[0016] Example 1 A waterproof coal powder and its preparation method

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

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

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

[0020] 2) After the above weighed raw materials are mixed and stirred uniformly, they are added to the drum heating reactor, and after the temperature is raised to 110°C, the rolling heating is maintained for 20 minutes to obtain the waterproof coal powder; wherein the temperature rise rate of the temperature rise is 2°C / min.

[0021] According to the method of DB51 / 172-1993, the performance test of the above-mentioned waterproof coal powder prepared in this embodiment shows that the water-resistant coal powder prepared in this embodiment has a hydrophobicity rate of 99%. Under 700mm water column pressure, 4 days wit...

Example Embodiment

[0022] Example 2 A waterproof coal powder and its preparation method

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

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

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

[0026] 2) After the above weighed raw materials are mixed and stirred uniformly, they are added to the drum heating reactor, and after the temperature is raised to 110°C, the rolling heating is maintained for 20 minutes to obtain the waterproof coal powder; wherein the temperature rise rate of the temperature rise is 2°C / min.

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

Example Embodiment

[0028] Example 3 A waterproof coal powder and its preparation method

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

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

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

[0032] 2) After the above weighed raw materials are mixed and stirred uniformly, they are added to the rolling heating reactor, and after the temperature is raised to 130°C, the rolling heating is maintained 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 coal powder prepared in this embodiment was tested for performance, and the result showed that the water-repellent coal powder prepared in this embodiment had a water repellency rate of 98.5%. ...

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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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