岩棉纤维制备气固分离陶瓷材料的性能

Properties of Ceramic Filter for Gas-solid Separation Prepared Using Rock Wool Fiber

以岩棉纤维和淀粉为主要原料,水玻璃为粘结剂,CMC为塑性剂,采用压制成型的方法制备了气固分离陶瓷材料。实验探讨了淀粉含量和烧制温度对材料抗折强度、过滤阻力和气孔率等性能的影响,并采用扫描电镜(SEM)对多孔陶瓷的显微结构进行表征。实验结果表明:当淀粉含量为25%、烧制温度为800℃时,材料抗折强度达7.8 MPa,过滤阻力为172 Pa,显气孔率达72%,脉冲反吹180次后过滤阻力为218 Pa,且后续反吹不再显著上升。

The ceramic filter material was prepared by extrusion molding for gas-solid separation. The rock wool fiber and starch were usedas main materials, sodium silicate and CMC were selected as binder and plasticizer, respectively. The effects of pore-forming agent content,water glass content and sintering temperature on the flexural strength and filtration resistance of the ceramic filter were discussed. Themicrostructure were characterized by scanning electron microscope （SEM）. The results show that when the content of pore-forming agent is25% and the sintering temperature is 800 ℃, the material has excellent performance, the flexural strength is 7.8 MPa, the filtration resistanceis 172 Pa and the porosity is 72%. After 120 times pulse-jet cleaning, the filtration resistance is 218 Pa, no longer increased significantly.