制革污泥固化用建材初探

Building Materials from Stabilization/Solidification of Tannery Sludge

采用正交试验设计极差分析方法,确定固化块的最优组合为3#试样,即炉渣35%、污泥5%、水泥45%、石膏15%,抗压强度达20.39MPa,完全满足固化块作为建筑材料强度的要求。且固化块毒性浸出浓度(铬)小于0.004mg/L,远远低于国家毒物浸出要求标准(铬1.5mg/L),大大减小了制革污泥对环境带来的二次污染的隐患。从而使得固化/稳定化处理后的制革污泥应用到建筑材料成为可能。

By orthogonal design method the best combination of solidification cake was obtained： 35% slag, 5% sludge, 45% cement and 15% gypsum. After curing 28 days the compressive strength is 20.39MPa, fully satisfying the requires of building materials. And the leaching toxic heavy metals Cr concentration is less than 0. 004mg/L which is far below the standards required by the national toxicology leaching （ 1.5 mg/L）. It is helpful to reducing the tannery sludge pollution and making stabilization/solidification tannery sludge into building materials.