Preparation method of foam glass

Abstract

The invention discloses a preparation method of foam glass. The preparation method comprises taking graphite powder as a foaming agent, mixing the graphite powder with pretreated glass powder, and performing firing to obtain the foam glass product. Waste glass in daily life is taken as a raw material, and the raw material is cleaned and dried, crushing and ball-milling are performed to prepare glass powder with a particle size smaller than 300 microns, the glass powder is mixed with a proper amount of the graphite powder, ball milling is performed in a ball mill, 50-mesh sieving is performed,a proper amount of the mixture is taken for forming under a certain pressure, the formed mixture is placed into a stainless steel mold coated with a release agent for firing according to a certain process condition, and the foam glass product is obtained. The average pore diameter of the prepared foam glass is about 0.2mm, the product density is 460 kg / m<3>, the water absorption rate is less than3.5%, the foaming is uniform, the volume expansion is obvious, the air holes are small and uniform, the communication holes are less, and the foaming quality is optimum. The foam glass prepared by thepreparation method can be applied to heat-preservation, sound-absorption and heat-insulation materials; and the dual problems of environmental pollution and resource reutilization are effectively solved by the preparation of the foam glass.

Description

technical field [0001] The invention relates to a method for preparing glass, in particular to a method for preparing foam glass, and belongs to the field of glass industry. Background technique [0002] Foam glass is an inorganic non-metallic composite material, which was first successfully developed by the French Saint-Gobain company. It uses waste glass and various substances rich in glass phase as the main raw material, adding a foaming agent, pulverized by a ball mill and mixed evenly to form a batch material. After pre-pressing, it is placed in a specific mold for melting, foaming and annealing. A glass material filled with uniform pores inside. It has a series of superior properties such as low bulk density, thermal insulation, sound absorption, waterproof and moisture-proof, acid and alkali resistance, stable chemical performance, high mechanical strength and easy processing, and is widely used in petroleum, chemical, construction, national defense and military proj...

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Problems solved by technology

[0004] In the production process of foam glass, many kinds of defects often appear, such as the large difference in the internal pore size of the product, uneven distribution of bubbles, uneven surface, and even some mixtures without foaming, etc., which affect the quality of foam glass products. And the foaming agent generally uses silicon carbide, and the cost is relatively high

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