MCR技术在铝土选矿排污水回用中的应用
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摘要
为使铝矿浮选废水更好回用于浮选工艺,提高废水重复利用率,减少废水排放对环境造成的危害,对浮选废水处理进行了研究.首先介绍了选矿废水处理的常用典型技术路线并进行了定性分析;再结合特定铝矿浮选废水回用案例,创新性引入膜化学反应器(MCR)技术,使浮选废水经过MCR后,直接达到RO进水要求,从而提出了气浮+MCR+RO+NF的物化与膜法结合的技术路线,并通过实验和工业化实施,进行了定量分析.结果表明,MCR技术不仅可以作为RO预处理技术,而且可直接应用于污水系统;该技术极大克服了传统膜技术对水质要求高的缺点,拓宽了膜技术适用范围,简化了废水处理流程,并使浮选废水回用率提高至80%以上.
In order to make bauxite flotation wastewater better reused for flotation process, improving the reuse rate and reducing the harm to the environment caused by the wastewater discharge, research on the bauxite flotation wastewater treatment has been conducted. Firstly, some typical technical routes of wastewater treatment were introduced and analyzed qualitatively. Then, combined with the case of specific aluminum ore flotation wastewater reuse, an innovative technology-MCR(Membrane Chemical Reactor) was introduced. After MCR process, the permeate water met the need to RO inlet directly. The technical route of air flotation + MCR +RO+NF was proposed and put into a quantitatively analysis through experiments and industrialization. The results show that MCR technology can be used not only as RO pretreatment, but also can be applied directly to wastewater system. This technology greatly overcomes the disadvantages of traditional membrane technology which requires high feed water quality, expanding the scope of application of membrane technology, simplifying wastewater treatment process and increasing the reuse rate of flotation wastewater to over 80%.
In order to make bauxite flotation wastewater better reused for flotation process, improving the reuse rate and reducing the harm to the environment caused by the wastewater discharge, research on the bauxite flotation wastewater treatment has been conducted. Firstly, some typical technical routes of wastewater treatment were introduced and analyzed qualitatively. Then, combined with the case of specific aluminum ore flotation wastewater reuse, an innovative technology-MCR(Membrane Chemical Reactor) was introduced. After MCR process, the permeate water met the need to RO inlet directly. The technical route of air flotation + MCR +RO+NF was proposed and put into a quantitatively analysis through experiments and industrialization. The results show that MCR technology can be used not only as RO pretreatment, but also can be applied directly to wastewater system. This technology greatly overcomes the disadvantages of traditional membrane technology which requires high feed water quality, expanding the scope of application of membrane technology, simplifying wastewater treatment process and increasing the reuse rate of flotation wastewater to over 80%.
引文
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[2] 吴边华,董洁.关于铝土矿浮选脱硅的综述[J].煤炭技术,2008,27(4):120-122.
[3] Chen J M,Liu R Q,Sun W.Effect of mineral processing wastewater on flotation of ulfideminerals[J].Trans Nonferrous Met Soc China,2009,19(2):454-457.
[4] 陈绍华.烃基黄药类捕收剂的生物降解性研究[D].武汉:武汉理工大学,2009.
[5] 北京水环境技术与设备研究中心,北京市环境保护科学研究院,国家城市环境污染控制工程技术研究中心.三废处理工程技术手册-废水卷[M]//北京:化学工业出版社,2000:267.
[6] 黄春成,宋江红.水质对铝土矿浮选指标的影响[J].世界有色金属,2007,(1):13-15.
[7] 陈明莲.选矿废水处理及回用技术研究[J].现代矿业,2017,(1):237-239.
[8] 陈代雄,朱雅卓,杨建文.某铅锌矿选矿废水的治理与回用试验研究[J].湖南有色金属,2013,29(4):43-47.
[9] 张艳芬,徐腮超.某铅锌矿选矿废水的处理工艺探讨[J].云南冶金,2013,42(3):68-78.
[10] 黄进,崔振宇,解田,等.磷矿选矿废水中浮选药剂回收与水深度处理的研究[J].矿冶,2012,21(2):88-90.
[11] 王自超.车河选厂硫化矿浮选废水处理及回用研究[D].北京:北京有色金属研究总院,2012.
[12] 章丽萍,项俊,陈婷婷,等.水解酸化 - BAF处理铅锌矿选矿废水研究[J].环境科学与技术,2016,(39):186-190.
[13] 中国铝业股份有限公司.一种选矿废水的处理方法[P].中国,CN201710678024,2017-08-10.
[14] 刘年兰,黄万抚.某铅锌选矿厂废水处理工艺探讨[J].矿业快报,2008,(10):67-68.
[15] 郑亭路,王慧欣.膜分离技术研究与应用[J].广东化工,2008,35(2):30-32.
[16] Mohsen N M,Montazerib P,Modarressc H.Removal of Cu2+ and Ni2+ from wastewater with a chelating agent and reverse osmosis processes[J].Desalination,2007,217( 5):276-281.
[17] Bodalo A.Viability study of different reverse osmosis membranes for application in the tertiary treatment of wastes from the tanning industry[J].Desalination,2005,180:277-284.
[18] 许佩瑶,吴世军.粉煤灰处理含重金属废水的研究进展[J].煤炭工程,2010,(2):95-97.
[19] 高宏,李恒,贺波,等.用改性粉煤灰微珠吸附处理铅锌硫化矿选矿废水[J].湿法冶金,2018,37(1):40-44.
[20] 刘跃.磷矿选矿废水处理与回用技术研究[D].武汉:武汉理工大学,2010.
[21] 汪幼民.石灰 - 絮凝沉降法处理选矿废水[J].湖南有色金属,2005,21(2):32-33.
[22] 罗惠华,李冬莲,王玉林,等.双碱法处理磷矿选矿工艺废水及循环利用研究[J].中国非金属矿工业导刊,2008,(3):48-50.