以造纸污泥和制革污泥联用制备轻质陶粒的研究

Preparation of Lightweight Ceramsite with Paper Sludge and Leather Sludge

对造纸污泥、制革污泥、粉煤灰以及粘土的成分进行了分析,在此基础上根据焙烧陶粒的原理,以造纸污泥、制革污泥、粉煤灰为主要原料,进行了陶粒烧制的研究。分析了污泥、粘土、粉煤灰的配比、烧结温度等不同因素对陶粒主要性能的影响。确定了烧制污泥陶粒的最佳工艺参数:造纸污泥:制革污泥∶粘土∶粉煤灰比例7.14%∶21.43%∶57.14%∶14.29%(wt.%)、预热温度300℃、预热保温时间10 min、烧结温度1180℃。所制备陶粒性能指标为:筒压强度为4.69MPa,松散容重为612.97 kg/m^3,吸水率为5.19%,铬溶出量0.02 mg/L,气孔分布均匀,完全符合生产标准。

The composition and the thermal performance of the paper sludge,tanning sludge,fly ash and clay were analyzed. On the basis of the theory of the calcined ceramic,the preparation of ceramsites with the paper sludge,tanning sludge and fly ash as the main raw materials was investigated. The effects of different factors such as sludge,clay,fly ash and sintering temperature were analyzed. The best process parameters of the sludge ceramic were determined： paper sludge：tanning sludge：clay：fly ash =7.14%：21.43%：57.14%：14.29%（wt%）; preheating time,10 min; preheating temperature,300 ℃; sintering temperature,1180 ℃. The properties of the prepared ceramics were as follows： the compressive strength was 4.69 MPa,the loose bulk density was 598.97 kg/m^3,the water absorption was 4.18%,the Cr dissolved was 0.02 mg/L and the pore distribution was uniform.