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Method for preparing microporous foam glass by use of waste glass

A microporous foam and waste glass technology, which is applied in the field of foam glass preparation with uniform diameter, can solve the problems of small thermal conductivity and low compressive strength, and achieve the effects of excellent thermal insulation performance, high production efficiency and simple process

Inactive Publication Date: 2014-02-05
HEBEI YL BANGDA NEW MATERIALS LTD CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity is small, about 0.05W / m·k at room temperature, but the compressive strength is small (about 0.7Mpa on average)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 uses waste flat glass as raw material to prepare microporous foam glass, and the specific process is as follows:

[0018] Step 1: Crushing and grinding the waste flat (D90) glass into fine glass powder with a particle size of 2.0 μm;

[0019] Step 2: Mix glass micropowder: water: sodium tripolyphosphate according to volume fraction of 45.0:54.5:0.5, and ball mill to prepare glass micropowder slurry with volume fraction of 45% high solid phase content.

[0020] Step 3, adding propyl gallate foaming agent (addition amount is 0.3% of the total volume of the slurry) to the above-mentioned glass micropowder slurry with high solid phase content, and fully stirred for 20 minutes to make the foaming rate of the slurry reach 85%, and bubbles Stable foam slurry with a diameter of 0.3-0.8mm.

[0021] Step 4: inject the above-mentioned foam slurry into the centrifugal atomization drying equipment to make a hollow glass microsphere body with a diameter of 0.2-0.5mm and...

Embodiment 2

[0023] Embodiment 2 uses waste plate glass as raw material to prepare microporous foam glass, and the specific process is as follows:

[0024] Step 1: Crushing and grinding the waste flat (D90) glass into fine glass powder with a particle size of 5.0 μm;

[0025] Step 2: Mix glass micropowder: water: sodium polyacrylate according to volume fraction of 35.0:64.7:0.3, and ball mill to prepare glass micropowder slurry with volume fraction of 45% high solid phase content.

[0026] Step 3: Add triton foaming agent (the amount added is 0.4% of the total volume of the slurry) to the above-mentioned glass powder slurry with high solid phase content, and fully stir for 20 minutes, so that the foaming rate of the slurry reaches 90%, and the bubbles Stable foam slurry with a diameter of 0.6-1mm.

[0027] Step 4: inject the above-mentioned foam slurry into the centrifugal atomization drying equipment to make a hollow glass microsphere body with a diameter of 0.2-0.5mm and a bulk density ...

Embodiment 3

[0029] Embodiment 3 uses waste flat glass as raw material to prepare microporous foam glass, and the specific process is as follows:

[0030] Step 1: Crushing and grinding the waste flat (D90) glass into fine glass powder with a particle size of 7.0 μm;

[0031] Step 2: Mix glass micropowder: water: ammonium citrate according to volume fraction of 55.0:44.6:0.4, and ball mill to prepare glass micropowder slurry with volume fraction of 45% with high solid phase content.

[0032] Step 3: Add triton foaming agent (the amount added is 0.5% of the total volume of the slurry) to the above-mentioned glass powder slurry with high solid phase content, and fully stir for 20 minutes, so that the foaming rate of the slurry reaches 95%, and the bubbles Stable foam slurry with a diameter of 0.8-1.2mm.

[0033] Step 4: inject the above-mentioned foam slurry into the centrifugal atomization drying equipment to make a hollow glass microsphere body with a diameter of 0.2-0.5mm and a bulk densi...

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Abstract

The invention discloses a method for preparing microporous foam glass by use of waste glass, belonging to the technical field of inorganic nonmetallic material forming. The method comprises the following steps: grinding the waste glass and levigating into glass micropowder; proportionally mixing the glass micropowder with water and a dispersing agent, and performing ball milling; after the ball milling, adding certain amount of room-temperature foaming agent and stirring to prepare stable foam slurry with high solid content; adding the foam slurry into centrifugal atomization drying equipment to prepare hollow microsphere blanks; collecting the microsphere blanks and heating in a high-temperature furnace, and preserving heat so as to foam the microsphere blanks; and sintering to prepare high-quality microporous foam glass with low density, high strength and low heat coefficient, wherein the diameter of the micropores is uniform and controllable. Without adding a high-temperature foaming agent and a reducing agent, the method has a short sintering heat cycle, does not need annealing and is generally applicable to glass powder and suitable for large-scale continuous production while the cost is low.

Description

technical field [0001] The invention belongs to the technical field of forming inorganic non-metallic materials, and in particular relates to a method for preparing microporous foam glass by using waste glass, in particular to a technology for preparing foam glass with controllable micropores and uniform diameter. Background technique [0002] Foam glass is a kind of lightweight, heat-insulating and sound-insulating material with excellent performance. It has the advantages of light weight, low thermal conductivity, sound insulation, electrical insulation and thermal stability, and low manufacturing cost. Material. [0003] Traditional foam glass uses ground glass powder as the main raw material, adds foaming agent, and is processed by melting and foaming, annealing and cooling. It has independent bubble structure, good thermal insulation and low volume density, about 0.2 -0.5g / cm 3 . The thermal conductivity is small, about 0.05W / m·k at room temperature, but the compress...

Claims

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Application Information

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IPC IPC(8): C03C11/00
Inventor 杨金龙苏振国席小庆陈金德葛国军
Owner HEBEI YL BANGDA NEW MATERIALS LTD CO
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