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以武汉市东湖淤泥作主要原料,通过向淤泥中掺入Fe_2O_3粉末,制备出一种膨胀性能良好的淤泥超轻功能陶粒基体。实验结果证明,Fe_2O_3粉末可以有效提高陶粒的膨胀率,调控陶粒的孔结构。在Fe_2O_3粉末掺量3%、焙烧温度1 150℃、焙烧时间20 min、预烧温度600℃、预烧时间10 min的条件下制得表观密度为0.394g/cm~3、吸水率为13.89%、显孔隙率为5.47%的淤泥超轻陶粒。Fe_2O_3粉末的掺入增加了陶粒内部孔隙的生成,并且形成了更多的连通孔隙,有利于功能组分的负载以及污染物的处理。
Taking Donghu sludge from Wuhan as the main raw material, a kind of silt ultra-light functional ceramisite matrix with good swelling property was prepared by mixing Fe_2O_3 powder into sludge. Experimental results show that, Fe_2O_3 powder can effectively increase the expansion rate of ceramic, ceramic pore structure control. The apparent density was 0.394g / cm ~ 3 and the water absorption rate was 13.89 at the dosage of 3% Fe2O3 powder, calcination temperature of 1 150 ℃, calcination time of 20 min, calcination temperature of 600 ℃ and calcination time of 10 min. %, Significant porosity of 5.47% silt ultra-light ceramsite. The incorporation of Fe 2 O 3 powders increased the formation of pores in the ceramsite and formed more interconnected pores, which facilitated the loading of functional components and the treatment of pollutants.