JP2000072480A - Production of lumpy foam glass having high water absorptivity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a producing method of lumpy foam glass having high water absorptivity with uniform product quality and >=50% 24-hour water absorptivity. SOLUTION: The lumpy foam glass is obtd. by adding at least one kind of foaming agent selected from silicon carbide, fine powder carbon, calcium carbonate, barium carbonate and magnesium carbonate by 1.5 to 6.0% to a glass powder, calcining the powder under properly selected conditions of 850 to 970 deg.C calcination temp., 10 to 40 min calcination time and 3 to 30 mm thickness of the powder. The obtd. lumpy foam glass has 0.1 to 0.8 gf/cm3 bulk density and >=50% water absorptivity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a waste glass obtained from waste glass bottles or the like discharged from households or the like, which is used as a main material, crushed and mixed with a foaming agent, and then melted, foamed and fired. Is used to produce irregularly shaped lump glass for landscaping, vegetation used for planting or roof gardens, or mixed with cohesive soil and used as a soil improvement material for 24 hours. It is manufactured with a water absorption of 50% or more, and is intended to replace foamed rocks (trade names such as perlite or mesalite) used for similar applications.

[0002]

2. Description of the Related Art Conventionally, as a glass foaming agent, silicon carbide, calcium carbonate, borax and the like are known, and these are mixed with glass powder in an amount of about 0.1 to 3.0% by weight, respectively, to obtain a raw material foamed glass powder. As shown in Japanese Patent Application No. 9-41297, there is an example in which an amorphous bulk foam glass is obtained by melting, foaming, and firing, followed by natural collapse.

[0003]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Application No. 9-412 is disclosed.
According to the production process of No. 97, the water absorption rate for 24 hours is 50%
In this case, a low water-absorbing massive foam glass having a water absorption of less than borax for stabilizing the inner wall of cells is added to the additive, the amount of the additive used is reduced as much as possible, and the foaming and firing time is reduced. The manufacturing method is also relatively short so as to prevent the closed cells from communicating with each other. In the present invention, contrary to the above-described production method, the conditions such as the amount and type of the additive for increasing the water absorption of the product or the reaction time are found and the problem is solved to obtain a stable product quality. , To further reduce manufacturing costs.

[0004]

According to the present invention, at least one of the commonly used blowing agents except for borax, ie, silicon carbide, fine carbon powder, calcium carbonate,
At least one of barium carbonate, magnesium carbonate, limestone, and talc is mixed with a glass powder at 1.5 to 6%, which is larger than that of the low water-absorbing massive foam glass, and fired at 850 to 970 ° C. Temperature, likewise longer 10-4
A firing time of 0 minutes is taken, and a raw material powder having a thickness of 3 to 30 mm is supplied and fired to determine the product quality such as bulk specific gravity and water absorption.

[0005]

The lump foam glass produced in this manner has a water absorption of 24 hours or more of about 50% for about 24 hours, and is intended for greening slopes, vegetation used for planting or roof gardens, or viscous soil. Amorphous mass-controlled foamed glass to be used as a soil conditioner by mixing with water is produced.

[0006]

Example 1 Black bottles, blue bottles, or glass bottles to be discarded to a final disposal site, such as glass waste, are roughly sorted out by removing caps and the like, and then pulverized by a ball mill to an average particle size of 10 μm. 1.0% by weight of micron silicon carbide and 2.0% of calcium carbonate having an average particle diameter of 10 microns are mixed, and the mixed powder is placed on a roller hearth kiln belt having a belt conveyor of 15 m length for 10 m.
m, foamed and baked at a calcination temperature of 900 ° C. for 20 minutes by LPG combustion, and the obtained plate-like foamed glass was quenched in the air to obtain a bulk specific gravity of 0.26 and a 24-hour water absorption of 83. An amorphous bulk foamed glass having an average particle size of 5% and an average particle size of about 30 mm was obtained.

[0007]

According to the present invention, the irregular shaped foam glass produced from waste glass bottles has a uniform product quality, and has a high water absorption characteristic of a water absorption rate of 50% or more for 24 hours. It can be used as a soil improver for vegetation used for planting, gardening or roof garden, or mixed with cohesive soil.

Claims (1)

[Claims] 1. A glass cullet made mainly from waste glass bottles is crushed, and silicon carbide, fine carbon powder,
Calcium carbonate, barium carbonate, magnesium carbonate, limestone, add and mix at least one powder of talc, spread the mixed powder on a mesh belt or caterpillar in a roller hearth kiln or tunnel kiln, melt, foam, After firing, quench,
In producing the lump-shaped foamed glass by pulverization, the single or mixed foaming agent is added in order to set the bulk specific gravity of the lump-shaped foamed glass to 0.1 to 0.8 gf / cm3 and the water absorption rate for 24 hours to 50% or more. The amount is 1.5 by weight based on the raw glass.
６6.0%, the average particle size of the ground glass is 5 to 500%.
3 to 30 mm thickness of glass mixed powder on micron, mesh belt or caterpillar, firing temperature 850 to 97
A method for producing a superabsorbent massive foam glass which is produced at 0 ° C. for a firing time of 10 to 40 minutes.