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Fluxing agent, preparation method and application thereof, and method for changing ash melting characteristic of coal

A technology of flux and content, which is applied in the field of coal chemical industry, can solve the problems of adding a large amount of flux such as calcium oxide and reducing the melting temperature of ash, achieving remarkable energy saving effects, reducing the melting point of ash, and changing the viscosity and temperature characteristics of ash

Pending Publication Date: 2022-08-02
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of the large amount of fluxes such as calcium oxide used to adjust the ash melting point T4 in the prior art, and to provide a flux and its preparation method and the effect of the flux on changing the ash melting of coal characteristics, the flux can significantly reduce the ash fusion temperature of coal

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  • Fluxing agent, preparation method and application thereof, and method for changing ash melting characteristic of coal

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preparation example Construction

[0022] A second aspect of the present invention provides the above-mentioned preparation method of a flux, the method comprising: burning a coal sample to obtain coal ash, and optionally mixing the coal ash with oxides to obtain the flux.

[0023] It should be understood that the combustion refers to complete combustion.

[0024] The coal sample may be an existing coal sample that can be obtained. When the components of the coal ash after combustion of the coal sample are within the component content of the fluxing agent, the fluxing agent can be directly obtained without post-treatment (for example, obtaining Coal ash obtained from coal combustion in Ningdong Coal Mine); if the components in the coal ash after combustion of the coal sample have components that are not within the content of the flux, the amount of each component can be adjusted by post-processing content to obtain the flux.

[0025] The oxide can be any existing oxide, as long as the content of the obtained f...

Embodiment 1

[0043] This example is used to illustrate the preparation of the flux according to the present invention and the method for changing the ash melting characteristics of coal.

[0044] Take the coal sample of Ningdong Coal Mine and prepare coal ash after complete combustion, namely flux X1. The average content of each component is as follows: based on the total weight of the flux, the content of calcium oxide is 24.04% by weight, the content of iron oxide is 20.34% by weight, the content of silicon dioxide is 29.32% by weight, the content of alumina The content of magnesium oxide was 15.48% by weight, the content of magnesium oxide was 4.98% by weight, the content of sodium oxide was 2.67% by weight, the content of potassium oxide was 1.32% by weight, and the content of titanium oxide was 0.88% by weight.

[0045] After the flux, optional auxiliary flux and coal sample I were mixed according to the consumption described in Table 1, the ash melting point of the mixed material was...

Embodiment 2

[0051] This example is used to illustrate the preparation of the flux according to the present invention and the method for changing the ash melting characteristics of coal.

[0052] Take another coal sample from Ningdong Coal Mine and prepare coal ash after complete combustion, namely flux X2. The average content of each component is as follows: based on the total weight of the flux, the content of calcium oxide is 23.44% by weight, the content of iron oxide is 19.18% by weight, the content of silicon dioxide is 30.57% by weight, the content of alumina The content of magnesium oxide was 16.29% by weight, the content of magnesium oxide was 5.57% by weight, the content of sodium oxide was 2.05% by weight, the content of potassium oxide was 0.96% by weight, and the content of titanium oxide was 0.74% by weight.

[0053] Coal ash was prepared by taking coal samples from Jushan Coal Mine and burning them completely. The average content of each component is as follows: based on th...

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Abstract

The invention relates to the field of coal chemical industry, and discloses a fluxing agent, a preparation method and application thereof, and a method for changing ash melting characteristics of coal. The fluxing agent contains calcium oxide, ferric oxide, silicon dioxide, aluminum oxide and magnesium oxide; wherein on the basis of the total weight of the fluxing agent, the content of calcium oxide is 20-35 wt%, the content of iron oxide is 15-30 wt%, the content of silicon dioxide is 20-35 wt%, the content of aluminum oxide is 10-20 wt%, and the content of magnesium oxide is 1-9 wt%. After the fluxing agent is mixed with coal, the ash melting temperature of the coal can be remarkably reduced, the ash viscosity-temperature characteristic type of the coal is changed, the gasification operation temperature is reduced, the coal consumption in the gasification process is reduced, and the energy-saving effect is remarkable.

Description

technical field [0001] The invention relates to the field of coal chemical industry, and discloses a fluxing agent and a preparation method thereof, an application of the fluxing agent in changing the ash melting characteristics of coal, and a method for changing the ash melting characteristics of coal. Background technique [0002] As an important part of clean coal technology, coal gasification converts cheap coal into clean gas, which can be used to produce chemical products. Coal gasification technology is one of the key technologies of coal chemical industry. At present, most of the gasifiers operated by domestic coal chemical enterprises use coal-water slurry as raw material to prepare syngas. CWS is prepared from coal and water, but not all coals can be used to prepare CWS for gasifiers. When the coal sample ash melting point T4 temperature is too high, the coal sample cannot be used, and its ash melting point needs to be adjusted. The existing method commonly used ...

Claims

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Application Information

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IPC IPC(8): C10L9/10C10L10/00
CPCC10L9/10C10L10/00Y02P10/20
Inventor 姚敏杨磊杨英杨会军蔚永清井云环金政伟吴跃马银剑
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD