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A method for preparing continuous alumina fiber from coal gangue

A technology of alumina fiber and coal gangue, which is used in fiber processing, chemical industry, climate sustainability, etc., to achieve the effect of remarkable energy saving, wide application and good heat resistance stability.

Active Publication Date: 2021-02-02
山西载驰科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Patents for the preparation of alumina fibers are rarely reported

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  • A method for preparing continuous alumina fiber from coal gangue
  • A method for preparing continuous alumina fiber from coal gangue

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Embodiment Construction

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0029] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] A method for preparing continuous alumina fibers from coal gangue, comprising the steps of:

[0031] ⑴Coal gangue crushing and thermal activation:

[0032] The coal gangue is crushed and sieved, and then mixed with red mud and sodium carbonate at a mass ratio of 10:20:3 to obtain a mixed material, which is then roaste...

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Abstract

The invention relates to the field of preparation of alumina fibers, in particular to a method for preparing continuous alumina fibers from coal gangue. It includes pulverizing coal gangue, followed by roasting and activation, hydrochloric acid leaching, iron removal, followed by crystallization of aluminum chloride to prepare spinnable sol, and finally electrospinning to prepare continuous alumina fibers. The preparation method is easy to operate, low in cost, easy to control the process, high in the extraction rate of alumina, stable in product quality, realizes the synergistic utilization of coal gangue and red mud, and the prepared continuous alumina fiber has good heat resistance stability, With chemical corrosion resistance and good wettability, it can be used as various heat treatment furnaces in the iron and steel industry, and the energy saving effect is remarkable. In addition, it can be used as a catalyst support in the chemical industry. Heat insulation materials for nuclear reactors and space shuttles, reinforcement materials for light alloys, etc.

Description

technical field [0001] The invention relates to the field of preparation of alumina fibers, in particular to a method for preparing continuous alumina fibers from coal gangue. Background technique [0002] Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. Its main component is Al 2 o 3 , SiO 2 , also contains varying amounts of Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O.P 2 o 5 , SO 3 And trace rare elements (gallium, vanadium, titanium, cobalt). Coal gangue is discarded, occupying a large area of ​​land. The accumulated coal gangue in China has reached more than 1 billion tons, and 100 million tons of coal gangue will be discharged every year. The comprehensive utilization of coal gangue has become a global concern. Coal gangue is one of the largest industrial solid wastes produced in my ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08D01D5/00
CPCD01D5/0007D01F9/08Y02P20/10
Inventor 任军安江伟丰开庆赵金仙张志磊
Owner 山西载驰科技有限公司
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