Glass ceramic mainly prepared from coal gangue and rice husk ash and preparation method thereof

A technology of glass-ceramics and main raw materials, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problem that iron oxide has not been utilized as a resource, the raw material processing process is complicated, and the transparency and gloss of glass-ceramics are affected and other issues, to achieve the effect of promoting healthy ecological development, good liquidity, and simple composition

Active Publication Date: 2018-09-07
ANHUI UNIV OF SCI & TECH
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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

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  • Glass ceramic mainly prepared from coal gangue and rice husk ash and preparation method thereof
  • Glass ceramic mainly prepared from coal gangue and rice husk ash and preparation method thereof
  • Glass ceramic mainly prepared from coal gangue and rice husk ash and preparation method thereof

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preparation example Construction

[0039] The preparation method of rice husk ash:

[0040] Introduce nitric acid with a volume ratio of 10% into the dried rice husk, place it in a constant temperature water bath at 100°C and heat it for 2 hours. During the heating process, make the nitric acid fully contact with the rice husk. After heating and drying, place it in a resistance furnace to raise the temperature to 650 ℃ for 9 hours to prepare rice husk ash.

[0041] What the present embodiment adopts is that the volume ratio is 10% nitric acid, the effect of nitric acid: remove the small amount of metal impurity elements such as Ca, Na, K, Mg, Fe etc. contained in the rice husk by acid treatment, improve SiO 2 The purity of the particles, and destroy the tissue structure of the rice husk, so that the rice husk is more fully pyrolyzed in the same time; those skilled in the art should understand that the acid treatment can also use inorganic acids such as hydrochloric acid and sulfuric acid.

Embodiment 1

[0043] (1) Ingredients

[0044] Coal gangue 28.5g, rice husk ash 4.20g, sodium carbonate 4.3g, calcium carbonate 7.5g, magnesium oxide 2.5g, titanium dioxide 3g.

[0045] (2) Experimental process

[0046] A. Mix the ingredients fully and evenly, place them in a corundum crucible, put them in a silicon-molybdenum rod high-temperature furnace, heat them to 900°C and keep them warm for 30 minutes, so that the volatile components in the mixture can be dispersed as much as possible, and the formation of bubbles in the glass liquid can be reduced, and then continue to heat up Melting at a high temperature of 1450°C for 2 hours to obtain a glass melt;

[0047] B. Immediately put the molten glass obtained above into cold water for quenching to obtain basic glass particles, then dry the basic glass particles, put them into a ball mill for ball milling, and pass through a 200-mesh sieve to obtain basic glass powder.

[0048] C. Mix the basic glass powder obtained above with polyvinyl ...

Embodiment 2

[0053] (1) Ingredients

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

[0055] (2) Experimental process

[0056] A. Mix the ingredients fully and evenly, put them in a corundum crucible, put them in a silicon-molybdenum rod high-temperature furnace, heat them to 900°C and keep them warm for 30 minutes, so that the volatile components in the mixture can be dispersed as much as possible, and the formation of bubbles in the glass liquid can be reduced. Then continue to heat up to 1400 ° C for 2 hours to melt at a high temperature to obtain a glass melt;

[0057] B. Immediately put the molten glass obtained above into cold water for quenching to obtain basic glass particles. Then the basic glass particles are dried, added to a ball mill for ball milling, and passed through a 200-mesh sieve to obtain the basic glass powder.

[0058] C. Mix the basic glass powder obtained above with polyvi...

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Abstract

The invention discloses a method for preparing glass ceramic by sintering bulk of solid waste coal gangue and rice husk ash serving as main raw materials. The glass ceramic provided by the invention is prepared from the following raw materials in parts by weight: 28.1 to 32.5 parts of coal gangue, 4.0 to 6.5 parts of rice husk ash, 3.5 to 5.0 parts of sodium carbonate, 7.0 to 8.5 parts of calciumcarbonate, 2 to 3 parts of magnesium oxide and 2 to 3 parts of titanium dioxide. The method comprises the following steps: mixing the ingredients evenly, and heating to a melting temperature of 1,400to 1,450 DEG C; performing quenching, ball milling and tableting on the obtained glass melt, preserving heat at 740 to 790 DEG C and 820 to 870 DEG C for 1 to 1.5 hours, and performing heat treatmentto obtain glass ceramic which takes calciclase as a principal crystalline phase and takes diopside as a secondary crystalline phase. A large amount of SiO2 in the rice husk ash serving as a raw material reduces the high aluminum characteristic of the coal gangue, adjusts the ratio of Si to Al in the formula, and improves the utilization ratio of the solid waste coal gangue and rice husk; moreover,the method has the advantages of simple formula composition, low melting temperature and relatively low heat treatment temperature; the prepared glass ceramic has high compactness, corrosion resistance and wear resistance, and the added value of two solid wastes of coal gangue and rice husk is greatly increased.

Description

technical field [0001] The present invention mainly relates to a glass-ceramic and its preparation method, in particular to a glass-ceramic whose main raw materials are bulk solid waste, coal gangue and rice husk ash, and its preparation method Background technique [0002] Coal gangue is an industrial solid waste produced in the process of coal mining and coal preparation. my country has accumulatively stockpiled more than 5 billion tons per year, and according to statistics, it is still rising at a rate of 300 to 350 million tons per year. Coal gangue is mostly discarded in the process of coal production and washing and processing. This passive stacking and disposal method not only prevents the value of coal gangue from being effectively utilized, but also occupies a large amount of land and causes a series of serious social and environmental problems. question. Although coal gangue is widely used in the world at present, the added value brought is relatively low, and som...

Claims

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Application Information

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Patent Type & Authority Applications(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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