沈阳市政污泥制备烧结砖的试验探究

以沈阳市政污泥为研究对象，开展污泥混合煤矸石和页岩材料制烧结砖的操作过程和产品应用的可行性研究。通过原材料测试评价和正交试验优化混配材料比例来确定最佳烧结制度，在此基础上，评估污泥添加量对砖性能的影响和样砖的环境安全性。结果表明：3种材料混配制砖的最佳烧结制度是污泥添加量为5%，烧结温度为1 050 ℃，烧结时间为9 h，该烧结制度下烧结砖样品检测指标达到或优于GB 5101—2003《烧结普通砖》的要求；混配材料试验中污泥添加量为0%~15%时，制得的烧结砖样品的抗压强度均能达到出厂标准；污泥添加量为0%~20%，烧结温度为1 050 ℃，烧结时间为9 h时，制得的烧结砖样品对环境安全无害。

Experimental study on the making of sintered brick using municipal sludge in Shenyang City

Taking municipal sludge of Shenyang City as an example, the operation processes and product application feasibility of sintered brick made of sludge mixed with coal gangue and shale were explored. The optimal sintering system was determined by optimizing the proportion of mixed materials through raw material test and evaluation and orthogonal experiment. On this basis, the influence of sludge addition on the performance of brick and the environmental safety of brick samples were evaluated. The results showed: The optimum sintering system for brick making with three kinds of mixed materials was as follows: sludge addition was 5%, sintering temperature was 1 050 ℃ and sintering time was 9 h. The performance of sintered brick samples met or exceeded Fired Common Bricks ( GB 5101-2003). In the test of mixed materials, the compressive strength of sintered bricks with sludge addition of 0%-15% could meet the factory standard. The sintered bricks with 0%-20% sludge, 1 050 ℃ sintering temperature and 9 h sintering time were safe and harmless for the environment.