As the main source of raw materials used by the glass, which can be a battle of the window, bottle and other glass accumulated in the solid household and industrial waste. Thus, obtaining foam glass accompanied by a glass recycling - waste, almost not decomposed over time and accumulate in the environment in the form of human waste.

Glass cullet - raw material for foamed glass production

Glass, after cleaning and drying of waste, is sent to grinding to obtain a powder with particles of size less than 50 microns. Since glass has a high strength, the process requires grinding of its high costs associated with abrasive wear of the equipment. The smaller the particles of the glass powder, the more uniform and the pores are evenly distributed in the material, the material is a more durable. Technology Penosytal foam glass also has its know-how, allowing to obtain a granular material and slab without ASR damage.

The main technological problem in the production of foam glass - glass batch foaming, whereby the material acquires a honeycomb structure. Finely pulverizing the glass with the addition of blowing agent is heated to a temperature of 750 ... 850 ºC; catching at this temperature the gas foams the softened glass.

The granulated foam glass is obtained by foaming the pre-rounded workpieces in rotary kilns.

Granulated foamed glass production in the rotary kiln

Plate (block) foam glass is obtained by foaming glass powder with additives in metal molds in the walk-through tunnel kilns. On leaving the oven the foam glass preform is cooled and sent to a sawing machine for filing to precise geometric dimensions.

Production of foam glass slab in a continuous furnace

In the process of pore formation is the entire mass of plastic viscous mixture, wherein the blowing agent is evenly distributed and evolved gas and creates a stable and uniform foam the glass. The resulting highly porous structure secured rapid hardening during the cooling of the glass product. Hardened foam glass is annealed to relieve thermal stresses in the bulk material.

The porous structure of the foam glass

Technology of production of foamed glass plates Penosytal from glass cullet

It is the high costs in the production of glass foam does not allow to reduce the cost of production and make penostekolnye materials available to the masses. However, the overall characteristics penostekolnoy products, surpassing all other heat-insulating materials, foam glass allows to find consumers seeking uncompromising materials: foam glass with high thermal insulation properties, foam glass does not burn, it is resistant to heat and aggressive chemicals, durability, frost resistance, is ecologically safe.

The history of development of foam glass technologies

For the first time in the world of foam glass as a building material mentioned in his report Academician II Kitaygorodsky All-Union conference on standardization and production of new materials in Moscow in 1932. Soon after the Soviet Union was proposed technology and outlined the application of foam glass.

In the 30s of the last century began intensive work and received patents for the production of foamed glass in France, Czechoslovakia, the United States, England and Germany. During the Second World War, research and technological works were stopped everywhere except the United States. It allowed the United States during the war to master large-scale production of foamed glass, mainly for the needs of the Navy, and then for many years to become a leader in the manufacture and research in this technology.

As a result of systematic research in the Soviet Union in the 70s were four plant for the production of foamed glass. The technology has been well established, and the total volume of production in the early 70-ies exceeded 100 thousand cubic meters a year, which at that time was a good indicator. Material used in great demand and are widely used in industry and construction, especially on particularly sensitive areas.

Unfortunately, the complexity of maintaining the process parameters, which led to the low yield of marketable product, and high energy consumption existing technology have led to the closure of unprofitable and during the crisis of the late 80's three plants, located in Russia. The only functioning today that existed in the former Soviet Union, factories located in Belarus - Gomel and successfully operates and increases its output of foamed glass.

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