铜冶炼污泥固化剂优选试验研究  

Optimization research of the treating agents for solidifying the sludge in a copper metallurgical plant

作　　者：李辕成[1,2] 祝星[1,2] 祁先进[1,2] 王华[1,2] 史谊峰[3] 王晓武[3] 廖天鹏[1,2] 胡建杭[1,2] 

机构地区：[1]昆明理工大学冶金节能减排教育部工程研究中心,昆明650093 [2]云南省复杂有色金属资源清洁利用国家重点实验室(培育基地),昆明650093 [3]云南铜业股份有限公司,昆明650093

出　　处：《安全与环境学报》2013年第6期85-90,共6页Journal of Safety and Environment

基　　金：昆明理工大学人才培养基金项目(KKZ3201252012);昆明理工大学校企基金项目(KKZ4201252006)

摘　　要：铜冶炼工厂普遍采用石灰-铁盐法进行污酸处理,该过程中会产生大量含砷及重金属离子的铜冶炼污泥。对于这种环境危害性大的污泥,固化是一种良好的无害化处理途径。用普通矿渣硅酸盐水泥为固化材料,以三乙醇胺、亚硝酸钠、氯化钠、硫酸钠为固化剂,利用正交试验对铜污泥进行固化处理。利用XRD、XRF、化学分析、SEM、强度测试与毒性浸出试验研究了不同固化剂对污泥固化效果的影响。结果表明:固化剂对固化后样品浸出毒性的影响显著;使用三乙醇胺复合固化剂的固化样品结构较为密实,强度最高,浸出毒性最低,能达到国家标准(GB 5085.3—2007)。Tim present paper intends to search for the optimized ap proach to treating the agent of solidifying the waste sludge in the cop per metallurgical plant. As is known, the sludge resulted from the waste acid treatment by using the limeiron salt technology in the cop per metallurgical plant contains arsenic and other heavy metal ions, mainly including with quite a high arsenic content （ 〉 5 % ）, though such heavy metal contents exist in the form of hydrate, sulfate, arsenate, aenite and other compounds. And some of them tend to be instable and permeable in the process of soil and water transportation, and in tuna is highly detrimental to the ecoenviron ment. Based on the results of our investigation, it is possible to treat such kinds of sludge by solidifying it by using the portland blast fur nace slag cement added by some processing agent, for example, tro lamine, NaNO2, NaC1 and Na2SO4 as the result of our exploration, in which we have detected the main raw materials of solidified sample are sludge and cement in a ratio between sludge and cement of 2/8. Furthermore, we have done the sludge solidification experiments by using different kinds of treating agents through chemical analysis, SEM, compressive strength and leaching toxicity tests in combination with XRD and XRF. The results of our experiments and tests indicate that the treating agent, i.e. trolamineNaNO2NaC1 proves to have a significant effect on the compressive strength and leaching toxicity. Since trolamine shows a strong positive effect on the concrete harden ing in a proper content less than 0.03 %, it also reveals some nega tive effects on the agent content over the said 0.03 %, for too much trolamine turns to retard the function of treatment during the hydration of cement. Moreover, the optimal compressive strength of the treating agent （TrolamineNaNO2NaCl） should be composed in a ratio of tro lamine （of 0.03%）, NaCI （of 0.5%） and NaNO2 （of 1.5%） whereas the idealistic sample of treating agent should be produced in a dense s

关 键 词：环境工程学 固化剂 污泥 砷 抗压强度 浸出毒性 

分 类 号：TU411[建筑科学—岩土工程]