A kind of foam glass prepared by using high-alumina, alkali-free and boron-free glass fiber waste and its manufacturing method

Abstract

The invention discloses foam glass prepared from waste high-aluminum alkali-free boron-free glass fiber. The foam glass comprises 90-96wt% of waste glass fiber, 0.5-5wt% of SiC, 0.5-5wt% of coke, 0.5-7.5wt% of Sb2O5, 0.5-7.5wt% of CeO2, 0.5-7.5wt% of Na2SO4 and 0.5-7.5wt% of Na2CO3, wherein the waste glass fiber contains not less than 12wt% of Al2O3; and the molar ratio of Na2O / Al2O3 in the composition of the foam glass is more than 1. The invention further discloses a manufacturing method of the foam glass. The foam glass disclosed by the invention has the advantages of low density, high compressive and flexural strength and excellent quality performance, and can not only effectively improve the comprehensive utilization of industrial wastes, but also reduce the manufacturing cost of the foam glass and the environmental harm caused by the foam glass. In addition, the preparation process disclosed by the invention has the advantages of simple process and low production cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of foam glass, in particular to a foam glass prepared from alkali-free, boron-free and high-aluminum-content glass fiber waste and a manufacturing method thereof. Background technique [0002] With the development of our country's national economy, the demand of the construction industry is expanding and improving, and the building wall materials are in the development period of replacement. Compared with traditional materials and other new materials, foam glass has excellent performance in terms of mechanics, heat, and acoustics. Superior performance, but also has the inherent permanence, safety, reliability, chemical corrosion resistance and ant-free of the glass material itself. It can be widely used in medium temperature heat insulation, heat insulation and waterproof of building interior and exterior walls. Moisture-proof engineering, decoration engineering, petrochemical, refrigeration, subway and und...

AI Technical Summary

Problems solved by technology

For this reason, high-temperature blowing agent SiC is used in the prior art, and by combining with O 2 The reaction produces CO 2 gas to form bubbles (SiC+O 2 =Si+CO 2 ↑), but it is difficult for the oxygen in the air to enter the powder and react with SiC during the foaming process, so the oxygen supplier Sb was added 2 o 3 , but since Sb 2 o 3 The decomposition temperature of the glass powder is as high as 1400°C, far exceeding the melting temperature of the glass powder, so it cannot play the role of oxygen supply, resulting in incomplete foaming of the foam glass, and the bubble wall is too thick, which makes the material density higher

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