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A method of directly sintering fly ash to prepare glass-ceramics

A technology of glass-ceramic and fly ash, which is applied in glass forming, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of low utilization rate of fly ash, low utilization rate of waste residue, high energy consumption in production, and achieve good performance. , the effect of low energy consumption and simple process flow

Active Publication Date: 2022-03-01
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing mainstream production process of using fly ash to prepare glass-ceramic--integral crystallization method and fusion sintering method has problems such as high production energy consumption, long process flow, and low utilization rate of waste slag. Crystal glass, the utilization rate of its fly ash is also low

Method used

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  • A method of directly sintering fly ash to prepare glass-ceramics
  • A method of directly sintering fly ash to prepare glass-ceramics
  • A method of directly sintering fly ash to prepare glass-ceramics

Examples

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example 1

[0081] The specific preparation method is as follows:

[0082] 1) Take high-calcium fly ash from a certain place in Xinjiang as the whole raw material without adding auxiliary materials. After drying at 105°C for 2 hours, carry out ball mill classification, take fly ash powder with a particle size of 48 μm and add 5% fly ash mass percentage The vinyl alcohol is uniformly mixed to obtain a glass-ceramic green body powder.

[0083] 2) The green body powder is flatly spread in the forming abrasive tool, and the glass-ceramic green body is obtained after holding the pressure at 20 MPa for 30 seconds with a green body forming press.

[0084] 3) Put the glass-ceramic body into the tunnel kiln and raise the temperature directly from room temperature to 950°C at a heating rate of 10°C / min and keep it warm for 30 minutes, then raise the temperature to 1180°C at a heating rate of 5°C / min and keep it warm for 60 minutes. After the furnace cools down, the samples are taken out, polished ...

example 2

[0087] The specific preparation method is as follows:

[0088] 1) Take the fly ash in Example 1 as the main raw material, choose waste glass and perlite as the ingredients, dry the fly ash and the ingredients at 105°C for 2 hours, crush and classify by ball milling, and separate the components according to mass percentage 90% of fly ash, 5% of waste glass, and 5% of perlite are weighed and mixed, and the powder with a particle size of 37 μm is added to 5% by mass of glycerin and mixed evenly to obtain a glass-ceramic green body powder;

[0089] 2) The green body powder is flatly spread in the forming abrasive tool, and the green body forming press is used to hold the pressure at 30 MPa for 30 seconds to obtain the glass-ceramic green body.

[0090] 3) Put the glass-ceramic body into the tunnel kiln and raise the temperature directly from room temperature to 1160°C for 60 minutes at a rate of 10°C / min. After cooling down with the furnace, take out the sample, polish it, and trim ...

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Abstract

The invention provides a method for directly sintering fly ash to prepare glass ceramics. The method comprises the steps of: using fly ash as a raw material, or using fly ash and ingredients as raw materials, pretreating the raw material, and then mixing it with a binder to obtain a green body powder; wherein, the binder and the raw material The mass ratio of the raw material is 2 to 10:100, and the mass proportion of fly ash in the raw material is more than 90%. The ingredients include flux and / or glass-ceramic component supplements; the green body powder is pressed and molded to obtain Green body: heating the green body to 1100-1200° C. for sintering, and cooling after sintering to obtain glass ceramics. The beneficial effects of the present invention may include: the utilization rate of fly ash can reach 90-100%; the process flow is simple, the energy consumption is low, the environment is green, and it is beneficial to industrial promotion, especially suitable for application in areas where lignite and sub-bituminous coal are used as power fuels .

Description

technical field [0001] The invention relates to the technical field of fly ash treatment and comprehensive utilization, in particular to a method for preparing glass-ceramics by directly sintering fly ash. Background technique [0002] Fly ash is an artificial volcanic mixed material emitted by coal combustion, and is a powdery substance collected by a dust collector after pulverized coal is burned at high temperature in a boiler. The chemical composition of fly ash varies with the type of coal burned. If the CaO content in fly ash is high, the application of fly ash in the field of building materials is limited. However, with the development of the times, more lignite and sub-bituminous coal with high volatile content are used as power fuels. High-calcium fly ash already emits more than low-calcium fly ash in some regions. Therefore, high-calcium fly ash urgently needs comprehensive utilization with high added value. [0003] Glass-ceramics is a type of polycrystalline m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/04C03C10/06C03C10/14C03C6/00C03C6/02C03B19/06
CPCC03B19/06C03C1/002C03C10/0036C03C10/0063
Inventor 孙红娟曾丽彭同江丁文金
Owner SOUTHWEAT UNIV OF SCI & TECH
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