A kind of waterproof coal powder and preparation method thereof

A technology for pulverized coal and paraffin, which is applied in the field of waterproof pulverized coal and its preparation, can solve the problems such as the limitation of pulverized coal storage time, transportation mode and application field, influence on the use of coal-water slurry, shortening of storage time, etc., so as to achieve a long effective storage time. , Guaranteed performance, good waterproof performance

Active Publication Date: 2017-10-20
CHONGQING SIJI JINBIAO TECH CO LTD
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  • Abstract
  • Description
  • Claims
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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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  • A kind of waterproof coal powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[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 rat...

Embodiment 2

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

[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 in this embodiment w...

Embodiment 3

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

[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 coal prepared in this ...

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Abstract

The invention discloses a waterproof coal powder and a preparation method thereof. The waterproof coal powder comprises the following components in parts by weight: 5-30 parts of calcium salt or Ca(OH)2, 1-10 parts of stearic acid or stearic acid Salt and 60-94 parts of coal powder; the preparation method first weighs the component formula of the said parts by weight, puts it into a drum reactor and raises the temperature to 110-140°C, and keeps heating for 20-60 minutes to obtain the waterproof coal powder . The method of the invention can change the coal powder from a hydrophilic substance to a hydrophobic substance, greatly reduce the hydrophilic property of the coal powder, and can prevent the volatilization of the volatile matter in the coal powder, thereby effectively avoiding the coal powder in storage. The problem of spontaneous combustion prolongs the storage time, increases the safety during storage and transportation, and has a good 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. Mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/06C10L5/04
Inventor 郑宇松周翰郑翔书范希锐
Owner CHONGQING SIJI JINBIAO TECH CO LTD
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