城市污泥及其焚烧灰混合料烧结陶粒的实验研究  

Experimental study on manufacturing haydite by sintering municipal sludge and its incineration ash

作　　者：程海翔[1] 周海[1] 李建辉 张辉[3] 

机构地区：[1]衢州学院化学与材料工程学院,衢州324000 [2]衢州市农业科学研究院,衢州324000 [3]中国科学院上海高等研究院,上海200000

出　　处：《环境工程学报》2016年第2期845-850,共6页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2009ZX07317-008);浙江省自然科学基金资助项目(LQ14E080012);衢州市科学技术局资助项目(2014Y015);衢州学院中青年学术骨干培养计划项目(XNZQN201503);衢州学院人才启动项目(BSYJ201408);浙江省大学生科技创新项目(2015R429014)

摘　　要：通过实验考察了直接利用城市污泥及其焚烧灰作为原料,采用2步烧结法工艺,烧结制取陶粒的可行性,并分析了工艺条件和物料配比对陶粒产品的吸水率和密度等性能指标的影响。实验结果表明,在不添加其他任何添加剂的情况下,城市污泥及其焚烧灰可以直接用于烧结制取陶粒。在物料配比为（1∶1-2∶1）和烧制条件（900-1 050℃）下焙烧5-20 min,可以获取不同性能的陶粒产品（吸水率为45.32%-4.11%、密度为1.67-0.84 g/cm3）。物相分析进一步表明,1 050℃是污泥灰物相发生变化的主反应温度。这为实现采用一种原料源（污泥及其污泥灰渣）制备陶粒的资源化利用方式提供了尝试。The feasibility of manufacturing haydite using municipal sludge and its incineration ash as raw material via ＂two-step sintering process＂was investigated. The effects of technological conditions and material ratio on the hygroscopic rate and the density of products were also explored. The results showed that municipal sludge and its incineration ash could be utilized directly to produce haydites without adding any additives. The haydites with different properties of hygroscopic rate（ 45. 32% —4. 11%） and density（ 1. 67—0. 84 g / cm3）,could be obtained by sintering under the optimal conditions of material ratio of 1 ∶ 1—2 ∶ 1 and sintering temperature of 900—1 050 ℃ for 5—20 minutes. X-ray diffraction（ XRD） further indicated that phase transformation of incineration ash occurred at 1 050 ℃. It provided a novel method to manufacture haydite utilizing a single raw material（ sludge and its incineration ash）.

关 键 词：污泥 焚烧灰 烧结 陶粒 

分 类 号：X705[环境科学与工程—环境工程]