Preparation and properties of foamed ceramics based on vanadium-titanium magnetite tailings
The massive accumulation of iron tailings in Panxi area has seriously polluted the local ecological environment.In order to solve the problem of iron tailings accumulation,the application of solid waste-based foamed ceramic absorbing materials has been promoted.The effects of sintering temperature,holding time and foaming agent content on the physical properties of the foamed ceramics were explored by orthogonal experiment.A preferred sintering plan,with 1190 ℃ of sintering temperature,60 min of holding time and 0.3％(mass fraction)of foaming agent content,is obtained by comprehensive analysis.The bulk density,water absorption,compressive strength,thermal conductivity and porosity of the foamed ceramics prepared according to the preferred sintering plan are 0.23 g/cm3,0.76％,0.73 MPa,0.06 W/(m·K)and 89.89％,respectively.Based on the process established by the orthogonal experiment,the effect of sample thickness on the absorbing properties of foamed ceramics was explored.The results show that when the sintering temperature is 1170 ℃ and the absorbent content is 30％(mass fraction),the foamed ceramics with a thickness of 15 mm has the best absorbing property,and the reflection loss is reduced to-28.58 dB in the frequency range of 0.5-18 GHz,showing an effective absorption bandwidth of 2.35 GHz.This study provides a reference for the resource utilization of vanadium-titanium magnetite tailings and the application of the foamed ceramics as absorbing materials.
vanadium-titanium magnetite tailingfoamed ceramicorthogonal experimentthermal insulation materialabsorbing material
万方数据
维普
