Coal slime treatment method

A treatment method and technology of coal slime, which is applied in the field of harmless treatment and resource utilization of coal slime, can solve the problems of low combustion efficiency and thermal efficiency, and achieve the effects of high thermal efficiency, stability, sufficient oxidation and good thermal stability of the device

Inactive Publication Date: 2018-12-14
DALIAN EAST REFRIGERATION EQUIP +1
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  • Abstract
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Problems solved by technology

[0006] Aiming at the problems in the existing coal slime treatment method that high-quality coal needs to be blended, and the combustion efficiency and thermal efficiency are low, the present invention provides a coal slime treatment method, which provides stable coal slime oxidation by using a temperature-regulating medium in the reactor. Temperature, can realize slime reduction, harmless treatment and efficient resource utilization

Method used

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  • Coal slime treatment method

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Embodiment 1

[0055] The initial water content of coal washing slime in a mining area is about 70wt%, and the industrial analysis and elemental analysis data of coal slime are as follows:

[0056] Table 1 Basic data of coal slime

[0057] War

Aar

Var

car

Har

Oar

Nar

Sar

Qnet.ar

%

%

%

%

%

%

%

%

MJ / kg

15

48.71

17.65

25.38

2.07

8.00

0.61

0.23

9700

[0058] The operating conditions and processing effects during the processing are as follows:

[0059] The temperature-regulating medium preparation process in the present embodiment 1 is as follows:

[0060] 1) Take high-quality high-alumina bauxite. The main components of high-alumina bauxite are as follows: Al 2 o 3 =71.22%, SiO 2 =22.53%, Fe 2 o 3 =2.48%, TiO 2 =0.58%, CaO=0.7%, MgO=1.06%, K 2 O=0.61%, Na 2 O=0.82%, crush the high alumina bauxite into powder, the mesh number is 200; take the industrial alumina powder with a purit...

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Abstract

The invention discloses a coal slime treatment method. The treatment method comprises the following steps: enabling coal slime to enter a reactor and be in contact with temperature-regulating medium particles in the reactor, carrying out a reaction under the effect of fluidizing air, performing separating treatment on the reacted flue gas, separating the large-size temperature-regulating medium particles taken out by the flue gas, returning to the reactor, and performing subsequent treatment on ground fine powder of small-particle coal slime and temperature-regulating medium particles in a flyash form along with the flue gas. According to the coal slime treatment method disclosed by the invention, due to use of the temperature-regulating medium particles in the reactor, a stable coal slime temperature is provided, coal slime reduction, innocent treatment and high-efficiency resource utilization can be realized, oxidation burning can be performed by taking pure coal slime as the raw material for recovering the heat, and the coal slime oxidation efficiency and thermal efficiency of the device are high.

Description

technical field [0001] The invention relates to the field of harmless coal slime treatment and resource utilization, in particular to a pure coal slime treatment method. Background technique [0002] Coal slime is a by-product of the coal washing process. Due to its characteristics of fine particle size, high moisture content, large ash content and high viscosity, it brings great difficulty to its comprehensive utilization. Due to the lack of effective utilization technology, many coal mines have piled up coal slime and discarded it. If coal slime is stored for a long time, it will not only take up a lot of land, but also pollute the environment. Coal slime has fine particles and is difficult to dehydrate. After drying treatment, it will fly all over the sky in the wind and flow everywhere in the rain, which has a great impact on the environment and ecology. Coal slime has a certain calorific value, and the calorific value of some low-ash coal slime is even higher than tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/08F23C10/24
CPCF23C10/08F23C10/24
Inventor 方向晨袁君王海波王金海孟凡飞李正茂王晶廖昌建王昊辰
Owner DALIAN EAST REFRIGERATION EQUIP
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