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Preparation method of foam glass

The technology of foam glass and glass powder is applied in the field of preparation of foam glass, which can solve the problems of low strength of foam glass, unusable foam glass, complicated production process, etc., and achieve the effects of being beneficial to waste utilization, uniform pores and small bulk 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 foam glass produced by this method cannot be used as a building load-bearing wall material (plate), and the manufacturing process is complicated
In terms of waste color picture tube utilization, Tian Yingliang used 90-96% by weight picture tube glass powder, 1-2% carbon black, 0.5-2% coke powder, 1.5-4% borax, 1-2% The foamed glass is prepared at 770-850°C after the zinc oxide is loaded into the mold. This preparation method not only increases the manufacturing cost, but also the strength of the manufactured foamed glass is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: First, clean the glass surface of the spent cathode ray tube after removing the electron gun, and remove the fluorescent coating and grid, crush, grind and pass through a 200-mesh sieve; then, the above-mentioned Waste cathode ray tube glass powder and 5% chemically pure calcium carbonate are mixed in a ball mill for 30 minutes, and then the uniformly mixed batch is put into a mold and heated from the chamber at a heating rate of 8°C / min. The temperature was raised to 500°C and kept for 20 minutes; then the temperature was raised from 500°C to 715°C at a rate of 10°C / min and kept at a temperature of 30 minutes for foaming, and then cooled to 600°C at a cooling rate of 20°C / min. And keep it warm for 40 minutes; finally, slow down the temperature at a rate of 1°C / min and anneal to room temperature to obtain foam glass.

[0008] The relevant test properties are:

[0009] Apparent density: 0.28g cm -3 ;

[0010] Average bubble diameter: 0.89mm;

[0011] Fl...

Embodiment 2

[0012] Embodiment 2: First, clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and grid, crush, grind and pass through a 300 mesh sieve; then, the above-mentioned Waste cathode ray tube glass powder and 3% chemically pure calcium carbonate are put into a ball mill and mixed for 40 minutes. The temperature was raised to 500°C and kept for 30 minutes; then the temperature was raised from 500°C to 725°C at a rate of 11°C / min and kept at a temperature of 30 minutes for foaming, and then cooled to 600°C at a cooling rate of 20°C / min. And keep it warm for 40 minutes; finally, slow down the temperature at a rate of 1°C / min and anneal to room temperature to obtain foam glass.

[0013] The relevant test properties are:

[0014] Apparent density: 0.35g cm -3 ;

[0015] Average bubble diameter: 0.84mm;

[0016] Flexural strength: 0.37Mpa.

Embodiment 3

[0017] Embodiment 3: First, clean the glass surface of the waste cathode ray tube after removing the electron gun, and remove the fluorescent coating and grid, crush, grind and pass through a 250 mesh sieve; then, the above-mentioned Waste cathode ray tube glass powder and 6% chemically pure calcium carbonate are put into a ball mill and mixed for 50 minutes, then the uniformly mixed batch is put into a mold, and the heating rate is 8°C / min from the chamber Raise the temperature to 500°C and keep it warm for 60 minutes; then raise the temperature from 500°C to 715°C at a rate of 12°C / min and hold it for 25 minutes for foaming, then cool it to 600°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 foam glass.

[0018] The relevant test properties are:

[0019] Apparent density: 0.24g cm -3 ;

[0020] Average bubble diameter: 0.91mm;

[0021] Flexural strength: 0.3...

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Abstract

The preparation method for 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 chemical-pure CaCO3 into a ball grinder for grinding and mixing to load into mold tool; heating with 8Deg / min speed from room temperature to 500Deg; heating with 10~12Deg / min from 500Deg to 710~730Deg; then, foaming and cooling with 20Deg / min speed to 600Deg, 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 needs temperature of lower 10~15Deg to similar method, is benefit to environment protection.

Description

technical field [0001] The invention relates to a method for preparing glass, in particular to a method for preparing 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. Foam glass is usually produced from waste flat glass, bottle glass, fly ash, etc., and the most commonly used foaming agent is carbon black. There are many related reports about using carbon black as a foaming agent, and most domestic factories use waste glass, bottle glass, and fly ash to produce foam glass, and the technology is mature. Nanjing University prepared microcrystalline foam glass with waste glass and fly ash as the main raw materials and calcium carbonate as the blowing agent. The...

Claims

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Application Information

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