酸洗废液及污泥制备磁性氧化铁颜料的工艺  

Process for preparing magnetic iron oxide pigment by pickling waste liquid and sludge

作　　者：冯海军[1] 王冠宁[2] 王立宝[2] 孙雅男 张彪[2] 陈涛[2] 张炜 FENG Haijun;WANG Guanning;WANG Libao;SUN Yanan;ZHANG Biao;CHEN Tao;ZHANG Wei(Tianjin Academy of Environmental Sciences, Tianjin 300191, China;Tianjin United Environmental Engineering DesignCo., Ltd., Tianjin 300191, China;Tianjin Guorun Yongtai Environmental Technology Co., Ltd., Tianjin 300384, China)

机构地区：[1]天津市环境保护科学研究院,天津300191 [2]天津市联合环保工程设计有限公司,天津300191 [3]天津市国润永泰环保科技有限公司,天津300384

出　　处：《化工进展》2019年第2期1129-1133,共5页Chemical Industry and Engineering Progress

基　　金：天津市科技重大专项与工程(16ZXGTSF00090)

摘　　要：以金属制品厂酸洗废液与酸洗污泥为原材料,采用湿式沉淀法制备高性能磁性氧化铁(Fe3O4)颜料。实验采用双氧水为氧化剂,15%石灰浆液调节反应液pH,利用蒸汽加热法为体系升温,以终点Fe^(3+)/Fe^(2+)比为判断依据,分析了废酸/污泥比、原液Fe^(3+)/Fe^(2+)比、反应时间、pH、反应温度对合成Fe3O4产品的影响。结果表明,随着实验不断进行,受空气影响,反应过程中Fe^(3+)/Fe^(2+)比是逐渐升高的;在废酸/污泥比为5∶1、原液Fe^(3+)/Fe^(2+)比为1.60∶1、反应时间为4h、p H为9、反应温度介于80～90℃之间条件下,合成产物色光及吸油量等指标达到氧化铁黑标准要求。本研究解决了行业内酸洗污泥资源化处置的瓶颈问题,为企业带来经济效益及环境效益。The preparation of high-performance magnetic iron oxide (Fe3O4) pigment from pickling waste liquid and acid-washed sludge was explored by wet precipitation method. In the experiment, hydrogen peroxide was used as oxidant, 15% lime slurry was used to regulate the pH of reaction liquid, steam heating method was used as heating system. Based on the ratio of end-point Fe^3+/Fe^2+, the influence of sludge volume, Fe^3+/Fe^2+ratio, reaction time, pH and reaction temperature on the synthesis of Fe3O4 were analyzed. The results showed that the ratio of Fe^3+/Fe^2+ increased gradually under the influence of air during the reaction. Magnetic iron oxide pigment with high quality was obtained under the conditions of pickling wastewater/sludge ratio 5∶ 1, Fe^3+/Fe^2+ ratio 1.60∶ 1, reaction time 4h, pH 9 and reaction temperature 80-90℃. The color light and oil absorption of the product can reach the black iron oxide standard. This study could solve the bottleneck problem of the resource treatment of acid-washed sludge in the industry and bring economic and environmental benefits to enterprises.

关 键 词：酸洗废液 酸洗污泥 磁性氧化铁(Fe3O4) 中试 

分 类 号：X757[环境科学与工程—环境工程]