Method for preparing foam glass with high foaming rate by utilizing lead-free high-barium abandoned lamp tube

A high foaming rate, foam glass technology, used in glass molding, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of small pore size, high density, and inability to keep heat and cold materials in foam glass, so as to improve the foaming rate, pore size, etc. Uniform, high-performance results

Inactive Publication Date: 2017-05-10
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, foam glass is prone to incomplete foaming during the foaming process, resulting in small pore size and high density of the finished foam glass, which cannot be used as thermal insulation materials on a large scale

Method used

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  • Method for preparing foam glass with high foaming rate by utilizing lead-free high-barium abandoned lamp tube
  • Method for preparing foam glass with high foaming rate by utilizing lead-free high-barium abandoned lamp tube
  • Method for preparing foam glass with high foaming rate by utilizing lead-free high-barium abandoned lamp tube

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Experimental program
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Effect test

Embodiment 1

[0021] A method for preparing foamed glass with a high foaming rate by using lead-free high-barium waste lamp tubes. The preparation method is to use lead-free high-barium waste lamp tubes to form raw material glass powder through ball milling, and mix foaming agents such as manganese dioxide, calcium carbonate, and auxiliary The flux sodium fluorosilicate and the stabilizer sodium phosphate are fed into the ball mill for ball milling, and the mixture after ball milling is fed into the high temperature resistant mold for preheating at 400~430°C for 15~20 minutes, and then the temperature is raised to 800~820°C for Foaming, foaming time 20~30min, then cooling to 500~550℃ for annealing, annealing time 35~40min, and finally cooling to room temperature with the furnace.

[0022] Among them, manganese dioxide, calcium carbonate, sodium fluorosilicate and sodium phosphate account for 3%~6%, 4%~8%, 4%~6%, 7%~9% of the total weight of the glass powder respectively; The particle size o...

Embodiment 2

[0029] 100 parts by weight of glass powder, 3 parts by weight of manganese dioxide, 6 parts by weight of calcium carbonate, 5 parts by weight of sodium fluorosilicate, and 9 parts by weight of sodium phosphate are sent into the ball mill for ball milling, and the particle size is 160 mesh; For the mold, the preheating temperature is 420°C for 17 minutes, the foaming temperature is 800°C for 20 minutes, and the annealing temperature is 530°C for 35 minutes. The prepared foam glass as figure 1 As shown, the pore diameter is relatively uniform, the average pore diameter is 2.8mm, the apparent density is 0.71g / cm3, and the compressive strength is 5.24MPa.

Embodiment 3

[0031] 100 parts by weight of glass powder, 4 parts by weight of manganese dioxide, 5 parts by weight of calcium carbonate, 4 parts by weight of sodium fluorosilicate, and 7 parts by weight of sodium phosphate are sent into the ball mill for ball milling, and the particle size is 175 mesh; For the mold, the preheating temperature is 420°C for 17 minutes, the foaming temperature is 810°C for 25 minutes, and the annealing temperature is 530°C for 35 minutes. The prepared foam glass as figure 2 As shown, the pore diameter is relatively uniform, the average pore diameter is 3.6mm, the apparent density is 0.64g / cm3, and the compressive strength is 4.53MPa.

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Abstract

The invention discloses a method for preparing foam glass with a high foaming rate by utilizing a lead-free high-barium abandoned lamp tube and belongs to the field of foam glass. The method comprises the following steps: carrying out ball milling on the lead-free high-barium abandoned lamp tube to form a glass powder raw material; feeding foaming agents, namely manganese dioxide and calcium carbonate, a fluxing agent, namely sodium fluorosilicate, and a stabilizer, namely sodium phosphate into a ball mill to be subjected to ball milling; feeding mixture obtained through ball milling into a high-temperature-resistant mould, preheating for 15-20 minutes at the temperature of 400-430 DEG C, then heating up to 800-820 DEG C, and carrying out heat preservation for 20-30 minutes; then cooling to 500-550 DEG C, annealing, and carrying out heat preservation for 35-40 minutes; and finally carrying out furnace cooling to room temperature. The prepared foam glass is uniform in pore diameter, closed pores are formed mainly, the average pore diameter reaches about 4.2mm, the density is 0.58g / cm<3>, the compressive strength is 3.78MPa, the performance is excellent, and the application standard of the foam glass can be met.

Description

technical field [0001] The invention relates to a high-expansion-rate foam glass material, in particular to a method for preparing high-expansion-rate foam glass by utilizing lead-free high-barium discarded lamp tubes, and belongs to the field of foam glass. Background technique [0002] Foam glass is an inorganic non-metallic glass material made of cullet, foaming agent, modifying additive and foaming accelerator, etc., after finely pulverizing and uniformly mixing, then melting at high temperature, foaming and annealing. Because foam glass has the advantages of low density, heat insulation, small thermal conductivity, corrosion resistance, fire prevention and pest resistance, and can handle a large amount of waste, it is not only widely used in petrochemical industry and construction industry as heat insulation material, but also as a This kind of cold insulation material is used in industries such as food refrigeration and shipping. [0003] However, foam glass is prone ...

Claims

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Application Information

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IPC IPC(8): C03C11/00C03C6/02C03C1/00C03B19/08C03C3/112
CPCC03C11/007C03B19/08C03C1/00C03C1/002C03C3/112
Inventor 赵毅红陈荣发赵有伟陈倩钰董然郑志伟郝维进姜苗苗
Owner YANGZHOU UNIV
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