The Study Of Preparation And Characterization Of Cellular Glass From Power Plant Slag

Cellular glass has small bulk density, high intensity, small thermal conductivity, low water absorption, non-moisture absorption, corrosion resistance and other excellent performance, and it’s a new type of environmentally-friendly materials. At present, the main material of cellular glass is common glass and the production process is instable, high cost and low economic efficiency. Power plant slag (also known as water quenching slag) is a plant cyclone furnace slag produced by cyclone furnace in plant and chemical companies. Except for a small number of cement fill and road construction, most of the slag is stored. Using liquid slag as the raw material of cellular glass, not only achieving a reasonable development and utilization of waste liquid slag at the same time can also reduce the energy consumption during the production of cellular glass. In this paper, we studied the laboratory method and process systems of preparation of cellular glass. Besides choosing a suitable foaming agent for the slag, we also studied the influence factors of cellular glass, include type of flux, material composition and ratio, heating rate, flowing temperature, holding time and other factors. Using stereomicroscope, universal testing machine, etc. we obtained the micro-morphology, bulk density, volume water absorption, compressive strength and other performance of cellular glass. We discussed the problems that appeared during the preparation and settled them out.The experimental results show that using a suitable foaming agent, a flux, and a stabilizer can prepare cellular glass. We choose TH as a foaming agent, TSN&TSJ as a flux compound, LSN as a stabilizer; preliminarily defined the optimize test system and process: heating from room temperature to preheating temperature 850℃; then at the rate of 10℃/min to the foaming temperature about 1200℃, insulation about 30 minutes, annealing, cooling; slag: TH: TSN: TSJ: LSN=3.78:0.40:0.05:0.40:0.15 (mass ratio); obtained performance of cellular glass as follows: volume density is 0.5409g/cm~3, volume water absorption is 4.83%, compressive strength is 0.55 MPa.