The Research On The Biodegradable And Refractory Property Of The Environment-friendly Fiber

As the energy-saving high-temperature furnace insulation materials, environment-friendly biodegradable refractory fibers can be entirely replace the traditional Aluminum silicate refractory fibers in some areas. Therefore research and development of environment-friendly biodegradable refractory fiber will help to improve the living environment of mankind, and enable people from the harm of non-degradable fibers.In this paper, the Environment-friendly biodegradable refractory fibers were prepared by melting the raw materials of wollastonite, magnesia, quartz sand and others. Meanwhile, The effects of a variety of additives on the performance of biodegradable fibers melt and degradation were studied.The solubility of refractory fiber in a simulated lung fluid were studied by adding different additives and the SEM analysis were done to the before and after dissolution. The degradation of the refractory fiber were discussed also. While the refractory fibers began dissolving, swelling from the surface, the structure become loose and the area of the fiber rapid expanded and spread., the fiber were dissolved because of the reaction between the amorphous silica and water. The magnesium silicate, calcium silicate in soluble fiber consumed the hydrogen ions in the water, what made the simulated lung fluid pH value to increase, and the solution with higher pH value would erode the fiber badly.In CaO-MgO-SiO₂ system, with the content of ZrO₂ increasing, the degradation of the soluble refractory fiber decline, as while as adding Al₂O₃.The viscosity curve about the CaO-MgO-SiO₂ systems had been drawn after adding different additives and testing the viscosity of the high temperature melting. By which, the effects of different additives on the high-temperature viscosity were discussed. The results showed that: high temperature melt viscosity declined with the temperature increasing. In the same temperature, as the content of ZrO₂ in the fiber increased, melt viscosity was improved. But at high temperature zone, when the content of Al₂O₃ was more, the melt viscosity was declined. However, in the Low-temperature zone, with Al₂O₃ content increased, melt viscosity was declined a little.