混合底泥基陶粒制备及其性能分析  

Preparation of ceramsite by mixed sediment and its properties analysis

作　　者：谢紫珺 蔡德所[1] 散剑娣 张昆 XIE Zijun;CAI Desuo;SAN Jiandi;ZHANG Kun(College of Hydraulic and Environment,Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《人民长江》2022年第4期182-188,共7页Yangtze River

基　　金：国家自然科学基金项目(40971280)。

摘　　要：随着底泥疏浚技术广泛应用于污染水体治理,河道底泥的处置成为一大难题,而利用底泥制备陶粒是当前底泥资源化利用的新方向。以两段河道的疏浚底泥为主要原料制备陶粒,通过单因素试验分析了原料配比、钢渣添加量、大理石粉添加量对陶粒性能的影响,通过L16(4^(4))正交试验确定了制备底泥基陶粒的最优条件。结果表明:制备的底泥基陶粒最优条件为烧结温度1000℃,烧结时间5 min,预热时间10 min,大理石粉添加量16%。该条件下制得的陶粒除磷率为98.04%,吸水率为28.55%,陶粒空隙率为48.43%,堆积密度为0.70 g/cm^(3),抗压强度为3.13 MPa,表观密度为1.36 g/cm^(3),满足CJ/T 299-2008《水处理用人工陶粒滤料》性能指标要求,证实了利用混合底泥制备陶粒的可行性,可为底泥的资源化利用提供参考。With the wide application of sediment dredging technology in treatment of polluted water bodies,the disposal of river sediment has become a major problem.The preparation of ceramsite by using dredging sediment is a new direction of sediment resource utilization.In this paper,ceramsite was prepared with sediment dredged from two different rivers as the main raw material.The effects of raw material ratio,steel slag ash content and marble powder content on the ceramsite performance were investigated by single factor experiments.Moreover,the optimal conditions for the preparation of sediment ceramsite were determined by L16(4^(4))orthogonal test.The results showed that the optimum preparation conditions were as follows:sintering temperature of 1000°C,sintering time of 5 min,preheating time of 10 min,marble powder addition of 16%.Under this condition,the phosphorus removal rate of the ceramsite products was 98.04%,the water absorption rate was 28.55%,the porosity of ceramsite was 48.43%,the bulk density was 0.70g/cm^(3),the compressive strength was 3.13 MPa,and the apparent density was 1.36g/cm^(3),which can meet the performance index requirements in CJ/T 299-2008 Artificial ceramsite filter material for water treatment,indicating the feasibility of preparing ceramsite by mixed sediment,and providing reference for the sediment resource utilization.

关 键 词：陶粒 底泥资源化利用 正交试验 除磷 

分 类 号：X703[环境科学与工程—环境工程]