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Method for preparing porous microcrystalline material from crystalline silicon cutting wastes in cooperation with coal gangue and application of porous microcrystalline material

A microcrystalline material, crystalline silicon cutting technology, applied in glass manufacturing equipment, manufacturing tools, glass molding and other directions, can solve problems such as uneven thermal field, achieve uniform heating, improve pore uniformity, and reduce production costs. Effect

Active Publication Date: 2019-12-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the purpose of the present invention is to utilize coal gangue and crystalline silicon cutting waste in large quantities to prepare porous microcrystalline materials, and at the same time utilize the high thermal conductivity of Si particles to solve the problem of porous microcrystalline materials in the heating and foaming process. To solve the problem of uneven thermal field, provide a method for synergistically preparing porous microcrystalline materials from coal gangue and crystalline silicon cutting waste

Method used

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  • Method for preparing porous microcrystalline material from crystalline silicon cutting wastes in cooperation with coal gangue and application of porous microcrystalline material
  • Method for preparing porous microcrystalline material from crystalline silicon cutting wastes in cooperation with coal gangue and application of porous microcrystalline material
  • Method for preparing porous microcrystalline material from crystalline silicon cutting wastes in cooperation with coal gangue and application of porous microcrystalline material

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Experimental program
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Effect test

Embodiment 1

[0058] The composition of coal gangue used in the present embodiment is: SiO 2 The content is 53wt%, Al 2 o 3 The content is 25wt%, Fe 2 o 3 The content of CaO is 5wt%, the content of CaO is 5wt%, SO 3 The content is 6wt%, K 2 O content is 2wt%, TiO 2 The content of MgO is 2wt%, the content of MgO is 1.7wt%, Na 2 O content is 0.2wt%, P 2 o 5 The content of polyethylene glycol is 0.1wt%, and the content of impurities is trace; the content of polyethylene glycol in the crystal silicon cutting waste is 10wt%, the content of SiC is 30wt%, the content of Si is 50wt%, SiO 2 The content is 5wt%, Fe 2 o 3 The content is 5wt%, and the impurity content is trace amount.

[0059] (1) 79wt% coal gangue, 11wt% feldspar, 4wt% soda ash, 3wt% crystalline silicon cutting waste and 3wt% foaming agent are uniformly mixed, added to a ball mill, and wet ball milled for 3 hours to obtain a fineness of ball milling of 200 purpose slurry, described whipping agent is limestone powder and ma...

Embodiment 2

[0068] The composition of coal gangue used in the present embodiment is: SiO 2 The content is 55wt%, Al 2 o 3 The content is 20wt%, Fe 2 o 3 The content of CaO is 8wt%, the content of CaO is 6wt%, SO 3 The content is 5wt%, K 2 O content is 2wt%, TiO 2 The content of MgO is 2.4wt%, the content of MgO is 1wt%, the content of Na 2 O content is 0.5wt%, P 2 o 5 The content of 0.1wt% is 0.1wt%, and the impurity content is trace amount; the content of polyethylene glycol in the crystal silicon cutting waste is 5wt%, the content of SiC is 25wt%, the content of Si is 50wt%, SiO 2The content is 10wt%, Fe 2 o 3 The content is 10wt%, and the impurity content is trace amount.

[0069] (1) Evenly mix 76wt% coal gangue, 14.5wt% feldspar, 4.5wt% soda ash, 2.5wt% crystal silicon cutting waste and 2.5wt% foaming agent, add to a ball mill, and carry out wet ball milling for 3 hours to obtain a good ball mill The fineness is 200 order slurry, and described whipping agent is dolomite p...

Embodiment 3

[0078] The composition of coal gangue and crystalline silicon cutting waste used in this embodiment is the same as that in Embodiment 1.

[0079] (1) 81wt% gangue, 9.5wt% feldspar, 4.5wt% soda ash, 2.5wt% crystalline silicon cutting waste and 2.5wt% whipping agent are uniformly mixed, and the whipping agent is Phlogopite and manganese dioxide ( Mass ratio is 0.5:2), obtains mixed material;

[0080] (2) drying the ball-milled slurry and controlling the temperature between 200°C to obtain powder;

[0081] (3) Send the mold with the powder into the furnace for heat treatment, as follows:

[0082] Preheating stage: raise the temperature in the heat treatment furnace from room temperature to 450°C, the heating rate is 5°C / min, and the holding time is 0.3h;

[0083] Sintering stage: raise the temperature in the heat treatment furnace from 450°C to 980°C, the heating rate is 5°C / min, and the holding time is 0.3h;

[0084] Foaming stage: raise the temperature in the heat treatment ...

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Abstract

The invention relates to a method for preparing a porous microcrystalline material from crystalline silicon cutting wastes in cooperation with coal gangue and an application of the porous microcrystalline material. The porous microcrystalline material is prepared from the following raw materials in percentages by weight: 70.0 to 85.0 wt% of coal gangue, 10.0 to 15.0 wt% of feldspar, 2.0 to 10.0 wt% of crystalline silicon cutting wastes, 2.0 to 8.0 wt% of sodium carbonate and 0 to 5.0 wt% of a foaming agent. The porous microcrystalline material prepared by the method has the characteristics ofa light weight, wear resistance, acid and alkali corrosion resistance, good chemical stability, high strength, shock cooling and heating resistance, good thermal insulation property, sound insulation,easy cutting and the like, and has the advantages of low comprehensive costs, reusability and the like; and the material can be widely applied to key materials in the fields of building decoration, battery plates, heat insulation, noise reduction, shock prevention and the like, and heat insulation of pipelines, storage tanks and heat exchange systems in the mechanical field.

Description

technical field [0001] The invention belongs to the technical field of porous material preparation, and in particular relates to a method and application of preparing porous microcrystalline material by cooperating with coal gangue from crystalline silicon cutting waste. Background technique [0002] On the one hand, in the field of traditional energy, my country is a big coal country, with an average annual coal production and consumption amounting to 100 million tons, and the environmental damage caused by mining is increasingly valued by people. As of 2017, according to incomplete statistics, the cumulative inventory of coal gangue in China has reached 4.5 billion tons, and the number is increasing by 150 million to 200 million tons every year. In the process of coal utilization, a large amount of coal gangue is produced, which destroys the surrounding living environment, causes surrounding ecological pollution, occupies a large amount of land, and easily causes geologica...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03C6/10C03C11/00C03B19/08C03B32/02C03B19/06
CPCC03B19/06C03B19/08C03B32/02C03C1/002C03C10/0063C03C11/007
Inventor 曹建尉邹传明王志王东赵明智
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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