Determination of sintering temperature of foam glass

A thermal power plant fly ash, waste plate glass; auxiliary materials are: blowing agent carbon powder, foaming agent manganese oxide, flux boric acid and so on. Choosing coke as a foaming agent is considering that the content of Al2O3 in the fly ash is high and the required foaming temperature is high.

The upper part of the 100-mesh sieve has a small amount of large particles mainly composed of unburnt carbon particles, and the ceramic fiber board will affect the foaming effect. Therefore, the fly ash on the 100 mesh screen is removed. Take fly ash and waste glass weight ratio (303-8): (70-62), foaming agent dosage of 0.2% -3.0%, then add the right amount of flux and foam stabilizer, weighing various raw materials and After mixing, put into the mold. Prior to firing, a small amount of the well-mixed mixture was taken for differential thermal analysis to determine the firing temperature regime of the foam glass.

The particle size and amount of the blowing agent The chemical affinity of the carbon powder and the molten glass is very small, and it is hardly wetted by the glass.

The unreacted residual toner adheres to the surface of the blister, which facilitates the formation of closed vesicles that do not penetrate each other. When the particle size and the amount of carbon powder are appropriate, an insulated foam glass with a large pore size and a uniform distribution can be obtained, which has small bulk density and low thermal conductivity. Carbon powders with the same content and different particle sizes have different effects on the pore structure. Small particle size is favorable for foaming, and the pore size of the pores is also relatively uniform. Also, the smaller the particle size, the smaller the amount of blowing agent used. The amount of toner in the experiment was 0.3%-0.8%.

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