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Method for preparing microcrystalline glass from kaolin-type coal gangue or fly ash and carbide slag

A technology of glass-ceramic and coal gangue, which is applied in the field of glass-ceramic preparation, can solve the problems of high cost, energy waste, complicated process, etc., and achieve the effect of quality improvement

Active Publication Date: 2012-11-28
北京盛康宁科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, when coal gangue, fly ash and calcium carbide slag are used as raw materials to prepare glass-ceramics, the sintering method is mostly used, that is, the molten glass liquid is water-quenched into glass slag or processed into small pieces of glass, and then these glass slag or glass The small pieces are spread on the shed of the kiln, and the temperature is raised again for crystallization. This process is complicated, consumes a lot of energy, and costs high. In addition, the air contained in the glass slag or glass small pieces cannot be sintered during sintering. Exclude cleanly, so that the glass-ceramic contains a lot of pores, which affects the quality of the glass-ceramic

Method used

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  • Method for preparing microcrystalline glass from kaolin-type coal gangue or fly ash and carbide slag
  • Method for preparing microcrystalline glass from kaolin-type coal gangue or fly ash and carbide slag
  • Method for preparing microcrystalline glass from kaolin-type coal gangue or fly ash and carbide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Coal gangue and calcium carbide slag are selected as main raw materials, and a calendering method is used to produce a glass-ceramic plate. The steps of the preparation method are as follows:

[0032] 1. Pretreatment of coal gangue:

[0033] (1) Crushing the gangue into fine particles with a diameter less than 30 mm;

[0034] (2) The coal gangue fine particles are burned in a fluidized fluidized furnace (the heat released is used for other purposes) to obtain furnace ash;

[0035] (3) Crushing the furnace ash into a fine powder less than 40 mesh;

[0036] (4) Carry out deironing to fine powder with deironing machine;

[0037] (5) Sampling and testing, as one of the main raw materials for preparing glass-ceramic.

[0038] 2. Pretreatment of carbide slag:

[0039] Pass the calcium carbide slag through a 40-mesh sieve to remove the graphite electrode debris mixed in it, and use it as another main raw material for preparing glass-ceramics.

[0040] 3. Design the basic ...

Embodiment 2

[0059] Fly ash and carbide slag were selected as the main raw materials, and the glass-ceramic Buddha statue was prepared by casting method.

[0060] 1. Pretreatment of fly ash:

[0061] (1) Iron remover removes iron from fly ash.

[0062] (2) Sampling and testing, as the main raw material for preparing glass-ceramic pipes.

[0063] 2. Carbide slag is pretreated: Pass the carbide slag through a 40-mesh sieve to remove the graphite electrode debris mixed in it, and use it as another main raw material for preparing glass-ceramics.

[0064] 3. Design the basic formula of the glass-ceramic Buddha statue:

[0065]

[0066] Note: Potassium oxide, sodium oxide, and barium oxide can be replaced by corresponding potassium carbonate, sodium carbonate, and barium carbonate, and boron oxide can be replaced by boric acid.

[0067] 4. Add 10-20 mesh 3% coal gangue furnace ash to the basic formula.

[0068] 5. Mix all kinds of raw materials evenly in proportion.

[0069] 6. Melting: ...

Embodiment 3

[0083] Coal gangue and carbide slag are selected as main raw materials, and patterned glass-ceramic decorative panels are prepared by sintering.

[0084] 1. Pretreatment of coal gangue:

[0085] (1) Crushing the gangue into fine particles with a diameter less than 30 mm;

[0086] (2) The coal gangue fine particles are burned in a fluidized fluidized furnace (the heat released is used for other purposes) to obtain furnace ash;

[0087] (3) Crushing the furnace ash into a fine powder less than 40 mesh;

[0088] (4) Carry out deironing to fine powder with deironing machine;

[0089] (5) Sampling and testing, as one of the main raw materials for preparing glass-ceramic.

[0090] 2. Carbide slag is pretreated: Pass the carbide slag through a 40-mesh sieve to remove the graphite electrode debris mixed in it, and use it as another main raw material for preparing glass-ceramics.

[0091] 3. Determine the basic formula of glass-ceramics:

[0092] Silica 25.5% Coal gangue furnace a...

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Abstract

The invention discloses a method for preparing microcrystalline glass from kaolin-type coal gangue or fly ash and carbide slag. The method comprises the following steps of: (1) pre-treatment of raw materials: the coal gangue needs to be sequentially subjected to carbon removal and iron removal, the fly ash can be directly subjected to iron removal, and the carbide slag needs to be subjected to graphite electrode chip removal; (2) material proportioning: the refractory coarse slag obtained after burning the coal gangue needs to be added in the proportioned materials; (3) melting: melting is performed in a low-temperature range, a part of unmelted mass points is reserved, and air bubbles in melted solution are eliminated; (4) forming: forming is performed by adopting a calendaring method, a pouring method or a sintering method; and (5) heat treatment: a microcrystalline glass blank is obtained via heat treatment, and the finished product is obtained after finish machining. According to the invention, wastes such as the kaolin-type coal gangue or the fly ash and the carbide slag can be abundantly used for producing high-performance microcrystalline glass containing granular patterns, which is similar to natural stone, and even similar to natural jade.

Description

technical field [0001] The invention relates to a method for preparing glass-ceramic, in particular to a method for preparing glass-ceramic by using industrial waste such as kaolin-type coal gangue, fly ash and carbide slag. Background technique [0002] In Inner Mongolia, coal gangue, fly ash and calcium carbide slag have become a major social hazard, not only occupying land, but also may spontaneously combust to pollute the air or cause fires. At present, coal gangue is mainly used to produce building materials such as gangue cement and lightweight aggregate for concrete. In addition, gangue can also be used to generate electricity and prepare chemical products such as alumina. The inorganic components of coal gangue are mainly silicon, aluminum, calcium, magnesium, iron oxides and some rare metals. Coal gangue in many areas of Inner Mongolia is basically composed of coal and iron-containing kaolin. Fly ash is one of the industrial wastes with large emissions in my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C6/08C03B32/02
Inventor 高红艳
Owner 北京盛康宁科技开发有限公司
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