论文部分内容阅读
以干化污泥作为替代燃料和造孔剂加入到以页岩为主体的原料体系中,制备出具有节能效果的多孔污泥页岩烧结墙体材料,这是提高污泥利用效率和满足村镇建筑节能建材制备的有效手段,探究了城市污泥掺量、烧结温度和烧结保温时间对烧结墙体材料试样的物理性能、力学性能的影响规律。结果表明,在采用污泥和瘠性页岩为主要原料时不能满足多孔节能烧结墙体材料挤出成型要求,而应采用压制成型工艺,当污泥掺量为15%时,烧结温度为1 050℃,保温时间为6 h,可以制备出性能指标优异并满足工程实用的烧结墙体材料,且污泥中的重金属可有效固溶于材料内部,气体排放也可满足国家标准中的相关指标要求,研究结果对干化污泥的利用具有较好的指导意义。
Using dry sludge as an alternative fuel and pore-forming agent into a shale-based raw material system, an energy-saving porous sludge shale sintered wall material is prepared, which is to improve the sludge utilization efficiency and meet the requirements of the towns and villages Building energy-efficient building materials, effective measures to explore the city sludge content, sintering temperature and sintering time on the sintered wall material sample physical and mechanical properties of the law. The results show that the use of sludge and barren shale as the main raw material can not meet the requirements of porous energy-saving sintered wall extrusion molding materials, but should be used compression molding process, when the sludge dosage is 15%, the sintering temperature is 1 050 ℃, holding time of 6 h, can be prepared with excellent performance indicators and to meet the engineering practical wall material, and the sludge of heavy metals can be effectively dissolved in the material within the gas emissions can also meet the relevant national standards Requirements, the results of the study on the utilization of dry sludge has a good guiding significance.