化工进展 ›› 2019, Vol. 38 ›› Issue (02): 1129-1133.DOI: 10.16085/j.issn.1000-6613.2018-0757

• 资源与环境化工 • 上一篇    下一篇

酸洗废液及污泥制备磁性氧化铁颜料的工艺

冯海军1(),王冠宁2(),王立宝2,孙雅男3,张彪2,陈涛2,张炜2   

  1. 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
  • 收稿日期:2018-04-12 修回日期:2018-08-16 出版日期:2019-02-05 发布日期:2019-02-05
  • 通讯作者: 王冠宁
  • 作者简介:<named-content content-type="corresp-name">冯海军</named-content>(1979—),男,硕士,高级工程师,主要从事环境保护科学研究与工程应用工作。E-mail:<email>navyfhj@sina.com</email>。|王冠宁,硕士,工程师,主要从事工业废水处理技术及污泥资源化技术开发工作。E-mail:<email>tjpuhhwgn@126.com</email>。
  • 基金资助:
    天津市科技重大专项与工程(16ZXGTSF00090)

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

Haijun FENG1(),Guanning WANG2(),Libao WANG2,Yanan SUN3,Biao ZHANG2,Tao CHEN2,Wei ZHANG2   

  1. 1. Tianjin Academy of Environmental Sciences, Tianjin 300191, China
    2. Tianjin United Environmental Engineering Design Co., Ltd., Tianjin 300191, China
    3. Tianjin Guorun Yongtai Environmental Technology Co., Ltd., Tianjin 300384, China
  • Received:2018-04-12 Revised:2018-08-16 Online:2019-02-05 Published:2019-02-05
  • Contact: Guanning WANG

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Fe3+/Fe2+比为判断依据,分析了废酸/污泥比、原液Fe3+/Fe2+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Fe3+/Fe2+比是逐渐升高的;在废酸/污泥比为5∶1、原液Fe3+/Fe2+比为1.60∶1、反应时间为4h、pH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。

关键词: 酸洗废液, 酸洗污泥, 磁性氧化铁(Fe3O4), 中试

Abstract:

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 Fe3+/Fe2+, the influence of sludge volume, Fe3+/Fe2+ratio, reaction time, pH and reaction temperature on the synthesis of Fe3O4 were analyzed. The results showed that the ratio of Fe3+/Fe2+ 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, Fe3+/Fe2+ 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.

Key words: pickling waste liquid, acid-washed sludge, magnetic iron oxide pigments, pilot experiment

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