A glass-ceramic with coal gangue and rice husk ash as main raw materials and its preparation method

A technology of glass-ceramics and main raw materials, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problem of complex raw material treatment process operations, affecting the transparency and gloss of glass-ceramics, and the lack of resource utilization of iron oxide and other issues, to achieve the effect of promoting healthy ecological development, simple composition, and cost reduction

Active Publication Date: 2021-09-07
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The raw material treatment process of this method is relatively complicated, and it is difficult to completely reduce a large amount of iron oxide in the raw material by relying on the trace carbon in the gangue, which will affect the transparency and gloss of the glass-ceramics, and the large amount of iron oxide removed is not reasonable. utilization of resources

Method used

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  • A glass-ceramic with coal gangue and rice husk ash as main raw materials and its preparation method
  • A glass-ceramic with coal gangue and rice husk ash as main raw materials and its preparation method
  • A glass-ceramic with coal gangue and rice husk ash as main raw materials and its preparation method

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Experimental program
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Effect test

preparation example Construction

[0039] Method for preparing rice husky ash:

[0040] In the dried rice husk, the volume ratio of 10% nitric acid is introduced into the dried rice husk, which is placed in a constant temperature water bath of 100 ° C, which makes nitric acid with the rice shell with the rice shell in the heating process to heat the temperature to 650. ° C insulation 9h was prepared by rice sheave ash.

[0041] In this example, the solution of nitric acid and nitric acid is used in the volume ratio: the small amount of metal impurity elements contained in the rice husk such as Ca, Na, K, Mg, Fe, etc. 2 The purity of the particles and destroys the tissue structure of the rice husk, so that the rice husk is more advanced in the same time; those skilled in the art should understand that acid treatment can also be used with hydrochloric acid, sulfuric acid.

Embodiment 1

[0043] (1) ingredients

[0044] Coal gangue 28.5g, rice shell 4.20g, sodium carbonate 4.3g, calcium carbonate, 2.5 g of magnesium oxide, and titanium dioxide 3g.

[0045] (2) Experimental process

[0046] A. A full uniform mixing is placed in a high-temperature furnace of the rigidated jade crucible, heating to 900 ° C for 30 min, so that the volatilization components in the mixing material are as degrees, reduce the formation of glass bubbles, and then continue to heat up Melting for 2 hours at a high temperature of 1450 ° C, a glass melting body is obtained;

[0047] B. The glass melt obtained in the above is immediately placed in cold water for quenching to obtain base glass particles, and then dry the base glass particles, add the ball mill, over 200 mesh, and obtain the base glass powder.

[0048] C. The basic glass powder obtained above is uniformly mixed with polyvinyl alcohol, wherein the addition of polyvinyl alcohols comprises 2% of the base glass powder weight, and the ...

Embodiment 2

[0053] (1) ingredients

[0054] 28.70 g of coal gangue, 4.5g of rice husk, 4.1g of sodium carbonate, 7.2 g of calcium carbonate, 2.5 g of magnesium oxide, 3g of titanium dioxide;

[0055] (2) Experimental process

[0056] A. A full uniform mixing of the ingredients is placed in a high temperature furnace of the bristles, heating to 900 ° C for 30 min, so that the volatilization components in the mixture are as scattered as possible, and the formation of glass liquid bubbles is reduced. Then, continued to heat up for 2 hours at a high temperature of 1400 ° C, and the glass melting body was obtained;

[0057] B. The glass melt obtained in the above is immediately placed in cold water for quenching to obtain basal glass particles. The base glass particles are then dried, and the ball mill is added, and the 200 mesh screen is added to obtain the base glass powder.

[0058] C. The basic glass powder obtained above is uniformly mixed with polyvinyl alcohol, wherein the addition of polyv...

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Abstract

The invention discloses a method for preparing glass-ceramics by using bulk solid waste coal gangue and rice husk ash as main raw materials by a sintering method. The glass-ceramics in the invention is composed of the following raw materials in parts by weight: coal gangue 28.1‑ 32.5, rice husk ash 4.0-6.5, sodium carbonate 3.5-5.0, calcium carbonate 7.0-8.5, magnesium oxide 2-3, titanium dioxide 2-3; mix the ingredients evenly and heat to a melting temperature of 1400-1450°C to obtain the glass After the melt is quenched, ball milled, and pressed into tablets, it is heat-treated at 740-790°C and 820-870°C for 1-1.5 hours respectively to obtain microcrystals with anorthite as the main crystal phase and diopside as the secondary crystal phase. Glass. A large amount of SiO in the raw material rice husk ash of the present invention 2 The high-alumina characteristics of coal gangue are reduced, the ratio of silicon to aluminum in the formula is adjusted, and the utilization rate of solid waste coal gangue and rice husk is improved, and the formula composition is simple, the melting temperature and heat treatment temperature are low, and the prepared glass-ceramics It has good compactness, strong corrosion resistance and wear resistance, which greatly improves the added value of the two solid wastes of coal gangue and rice husk.

Description

Technical field [0001] The present invention relates to a microcrystalline glass and a preparation method thereof, in particular to microcrystalline glass and preparation method thereof in the main raw material of massive abandoned waste coal gangue and rice shell. Background technique [0002] As the industrial solid waste produced during the coal gangue and the coal, my country has accumulated more than 5 billion tons per year, and the statistics are still rising at the rate of 3.0 to 350 million tons per year. Coal gangue is discarded in coal production and washing processing, which not only makes it worthy of effective use of coal gangue themselves not only, but will take a lot of land and lead to a series of serious social and environment. problem. Although there is currently a wide range of coal gangue, it is relatively low, and there will be some secondary pollution waste, for example: coal gangue brick cement, the pollution is also inevitable. of. [0003] Microcrystallin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03B19/06
CPCC03B19/06C03C10/0063
Inventor 刘银杨亚楠郑林义
Owner ANHUI UNIV OF SCI & TECH
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