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Method for preparing foam glass with adjustable micrometer-level air pore structure by using waste glass as raw material

A foam glass, micron-scale technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of foam glass cell wall thickness, increased process complexity, and high bulk density of foam glass

Inactive Publication Date: 2017-09-15
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain micron-scale pore diameters under the condition of insufficient foaming, the cell walls of the insufficiently foamed foam glass are very thick, resulting in high bulk density and low porosity of the prepared foam glass.
In addition, the hollow microspheres used in this method require centrifugal spray drying, which increases the complexity of the process to a certain extent.

Method used

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  • Method for preparing foam glass with adjustable micrometer-level air pore structure by using waste glass as raw material
  • Method for preparing foam glass with adjustable micrometer-level air pore structure by using waste glass as raw material
  • Method for preparing foam glass with adjustable micrometer-level air pore structure by using waste glass as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation process is as follows:

[0040] (1) Grind waste flat glass with a dry ball mill and pass through a 200-mesh sieve.

[0041] (2) Add water to the sieved waste glass powder to form a water-based slurry with a solid phase content of 20 wt%, and then use a planetary ball mill for 14 hours.

[0042] (3) The average particle size of the glass powder after planetary ball milling is reduced to 0.7 μm, and 0.40 wt % propyl mantholate and 0.05 wt % sodium cetyl sulfate are added to the slurry after ball milling.

[0043] (4) Stir the slurry after adding the surfactant evenly, then adjust the pH to 7.5 with 1 mol / L hydrochloric acid and ammonia water.

[0044] (5) The obtained slurry was mechanically sheared and foamed with a laboratory mechanical mixer, first stirred at a speed of 500 rpm for 5 min, and then stirred at a high speed of 1800 rpm for 10 min.

[0045] (6) The foam obtained after mechanical stirring is injection-molded on a gypsum board, demolded aft...

Embodiment 2

[0047] The preparation process is as follows:

[0048] (1) Grind waste flat glass with a dry ball mill and pass through a 200-mesh sieve.

[0049] (2) the waste glass powder of sieving is added water and is made into the water base slurry that solid phase content is 5wt%, utilizes then

[0050] Planetary ball milling for 16 hours.

[0051](3) The average particle size of the glass powder after planetary ball milling is reduced to 0.5 μm, and 0.30 wt % propyl mantholate and 0.03 wt % sodium cetyl sulfate are added to the slurry after ball milling.

[0052] (4) Stir the slurry after adding the surfactant evenly, then adjust the pH to 7.5 with 1 mol / L hydrochloric acid and ammonia water.

[0053] (5) The obtained slurry was mechanically sheared and foamed with a laboratory mechanical mixer, first stirred at a speed of 700 rpm for 3 minutes, and then stirred at a high speed of 2000 rpm for 15 minutes.

[0054] (6) The foam obtained after mechanical stirring is injection-molded ...

Embodiment 3

[0057] The preparation process is as follows:

[0058] (1) Grind waste flat glass with a dry ball mill and pass through a 200-mesh sieve.

[0059] (2) Add water to the sieved waste glass powder to form a water-based slurry with a solid phase content of 20 wt%, and then use a planetary ball mill for 10 hours.

[0060] (3) The average particle size of the glass powder after planetary ball milling is reduced to 0.8 μm, and 0.40wt% propyl manganate and 0.04wt% cetyl sodium cetyl sulfate are added to the slurry after the above ball milling

[0061] (4) Stir the slurry after adding the surfactant evenly, then adjust the pH to 7.5 with 1 mol / L hydrochloric acid and ammonia water.

[0062] (5) The obtained slurry was mechanically sheared and foamed with a laboratory mechanical mixer, first stirred at a speed of 300 rpm for 10 min, and then stirred at a high speed of 1500 rpm for 8 min.

[0063] (6) The foam obtained after mechanical stirring is injection-molded on a gypsum board, de...

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Abstract

The invention discloses a method for preparing foam glass with an adjustable micrometer-level air pore structure by using waste glass as raw material, and belongs to the technical field of recycling and reutilizing of waste glass. The method is characterized in that air bubbles are led into glass powder slurry added with a surfactant by a mechanical stirring machine in a mechanical shearing and foaming way. The method has the advantages that the light-weight foam glass with pore diameter of 20 to 200mu m can be obtained; by adjusting the content of solid phase in the slurry, the size of the pore diameter and the capacity weight can be effectively adjusted; the processing method can be used for preparing the foam glass with the open pore structure, and the foam glass with the closed pore structure; furthermore, by adjusting the sintering temperature, the foam glass with the secondary open pore structure can be prepared.

Description

technical field [0001] The invention relates to the field of recycling of waste glass, in particular to a method for preparing foam glass with adjustable micron-scale pore structure by using waste glass as a raw material. Background technique [0002] Foam glass, also known as porous glass, is a new type of inorganic material filled with numerous open or closed small pores. Foam glass has the characteristics of light weight, corrosion resistance, large specific surface area, fire resistance and flame retardancy, and good thermal insulation performance, so it is widely used. It can be applied to filter adsorption, catalyst carrier and thermal insulation material of building envelope. Foam glass is ground into powder with waste glass as raw material, which effectively improves the recycling rate of waste and is low in cost. Therefore, the preparation of foam glass has significant economic and social benefits. At present, foam glass is mostly prepared by adding high-temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B19/08C03C6/02
CPCC03B19/08C03C1/002
Inventor 杨金龙霍文龙陈雨谷鲁毓钜张在娟闫姝席小庆王亚利
Owner TSINGHUA UNIV
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