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Preparation method of crystallite foam glass

A technology of microcrystalline foam glass and glass powder, which is applied in the field of preparation of microcrystalline foam glass, can solve the problems of unusable foam glass, low strength of foam glass, complicated manufacturing process, etc., and achieves good waste utilization and good heat insulation effect , the effect of small volume density

Inactive Publication Date: 2006-07-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that in addition to glass powder and fly ash, non-metallic minerals are also added, and the manufacturing cost is relatively high.
The non-metallic minerals used include alkaline feldspar, silica sand, soda ash and calcite, and the compression molding is adopted, and the production process is complicated
In DE 19702560A1, a production method for producing foam glass particles using some cathode ray tubes was introduced, which mainly uses the glass part of the cathode ray tube, pulverizes it, adds foaming agent, auxiliary agent and binder, adds water, and mixes After granulation and shaping, granular foam glass is fired in a rotary kiln. It is mainly used as aggregate for lightweight building insulation materials. The foam glass produced by this method cannot be used as a building load-bearing wall material (plate), and the production process is complicated.
In terms of waste color picture tube utilization, Tian Yingliang used waste color picture tubes as the main raw material to prepare foam glass with carbon black as the blowing agent. In addition, in addition to adding the blowing agent carbon black, he also added 0.5-2% coke powder. 1.5-4% borax, 1-2% zinc oxide and other chemical raw materials increase the manufacturing cost, and the manufactured foam glass has low strength

Method used

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  • Preparation method of crystallite foam glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1, first, clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and grid, then crush, grind and pass through a 200-mesh sieve; then, 95% by weight Put the above waste cathode ray tube glass powder and 5% silicon carbide powder into a ball mill and mix them by ball milling. The ball milling time is 30-60 minutes. Preheat at room temperature to 650°C; then raise the temperature from 650°C to 850°C at a rate of 10°C / min and keep it warm for 25 minutes for foaming, then cool it to 550°C at a cooling rate of 20°C / min. and keep it warm for 60 minutes; finally, slow down the temperature at a rate of 1° C. / min and anneal to room temperature to obtain microcrystalline foam glass.

[0008] The test related performance is:

[0009] Apparent density: 0.22g cm -3 ;

[0010] Average bubble diameter: 1.64mm;

[0011] Flexural strength: 4.1Mpa;

[0012] Referring to the accompanying drawings, it can be ...

Embodiment 2

[0013] Embodiment 2, first, clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and the grid, then crush, grind and pass through a 300 mesh sieve; then, 97% by weight Put the above waste cathode ray tube glass powder and 3% silicon carbide powder into a ball mill and mix them by ball milling. The ball milling time is 30 to 60 minutes. Preheat at room temperature to 650°C; then raise the temperature from 650°C to 840°C at a rate of 11°C / min and keep it warm for 30 minutes for foaming, then cool it to 550°C at a cooling rate of 20°C / min. And keep it warm for 30 minutes; finally, slow down the temperature at a rate of 1° C. / min and anneal to room temperature to obtain microcrystalline foam glass.

[0014] The test related performance is:

[0015] Apparent density: 0.21g cm -3 ;

[0016] Average bubble diameter: 1.46mm;

[0017] Flexural strength: 3.9Mpa.

Embodiment 3

[0018] Embodiment 3, first, clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and the grid, then crush, grind and pass through a 250 mesh sieve; then, 94% by weight Put the above waste cathode ray tube glass powder and 6% silicon carbide powder into a ball mill and mix them by ball milling. The ball milling time is 30 to 60 minutes. Preheat at room temperature to 650°C; then raise the temperature from 650°C to 870°C at a rate of 12°C / min and keep it warm for 25 minutes for foaming, then cool it to 550°C at a cooling rate of 20°C / min. and keep it warm for 60 minutes; finally, slow down the temperature at a rate of 1° C. / min and anneal to room temperature to obtain microcrystalline foam glass.

[0019] The test related performance is:

[0020] Apparent density: 0.24g cm -3 ;

[0021] Average bubble diameter: 1.41mm;

[0022] Flexural strength: 4.4Mpa.

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Abstract

The preparation method for microcrystal foam glass comprises: clearing the glass surface of waste CRT without electron gun, removing the fluorescent layer and grid to smash and grind; putting the glass powder and SiC power into a ball grinder for grinding and mixing to load into mold tool; preheating with 8Deg / min speed from room temperature to 650Deg; heating with 10~12Deg / min from 650Deg to 840~900Deg, holding for 30~40min; then, foaming and cooling with 20Deg / min speed to 550Deg, holding for 20~60min; finally, annealing slowly with 1Deg / min speed to room temperature. The product has high mechanical strength and well physical properties. This invention is benefit to environment protection.

Description

technical field [0001] The invention relates to a method for manufacturing foam glass, in particular to a method for preparing microcrystalline foam glass. Background technique [0002] Foam glass is a new type of environmentally friendly building material with superior performance in heat insulation, sound absorption, moisture resistance, waterproof, and light weight. In practical applications, it is found that the mechanical strength of foam glass is low, which greatly limits the scope of use of foam glass. The method of adding a small amount of additives to the foam glass batch material to precipitate a certain amount of crystals in the foam glass after foaming can greatly improve the mechanical strength of the foam glass. Usually, waste flat glass, waste bottle glass, fly ash, etc. are used as the main raw materials to produce foam glass. Nanjing University uses waste glass and fly ash as the main raw materials, and calcium carbonate as the foaming agent to prepare micro...

Claims

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Application Information

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IPC IPC(8): C03C11/00C03C10/00
Inventor 高淑雅郭宏伟高档妮
Owner SHAANXI UNIV OF SCI & TECH
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