盐酸酸洗废液制备聚氯化铁
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摘要
钢铁生产过程中为了获得更好的产品性能,需要用盐酸进行淋洗或浸泡。酸洗后会产生大量腐蚀性和污染性的废液,酸洗废液直接排放会造成严重的环境污染。针对该废液,加入过氧化氢进行氧化,制备聚氯化铁,找出最佳处理工艺,达到资源回收和环境无害化的目的。磷酸二氢钾作稳定剂可使聚氯化铁更加稳定。溶液中n(磷)/n(铁)为0.048 6时,聚氯化铁产品一个月未出现沉淀;成品聚氯化铁中铁质量分数为11.04%,盐基度为10.2%,满足水处理剂聚氯化铁标准HG/T 4672—2014的要求。
In order to obtain better product performance in steel production process,it is necessary to use hydrochloric acid for rinsing or soaking.A large amount of corrosive and polluting waste liquor will be produced after pickling,and the direct discharge of acid pickling waste liquor will cause serious environmental pollution.Aiming at the waste liquor,hydrogen peroxide was added to the waste liquid for oxidation,and polymeric ferric chloride was prepared.The optimal treatment process was found to achieve the purpose of resource recovery and environmental harmlessness.KH2 PO4 as stabilizer could make polymeric ferric chloride more stable.When n(P)/n(Fe) in solution was 0.048 6,the product of polymeric ferric chloride did not precipitate for a month.The mass fraction of iron in the finished product of polymeric ferric chloride was 11.04% and the salinity was10.2%, which met the requirements of the standard HG/T 4672—2014 for water treatment agent polymeric ferric chloride.
In order to obtain better product performance in steel production process,it is necessary to use hydrochloric acid for rinsing or soaking.A large amount of corrosive and polluting waste liquor will be produced after pickling,and the direct discharge of acid pickling waste liquor will cause serious environmental pollution.Aiming at the waste liquor,hydrogen peroxide was added to the waste liquid for oxidation,and polymeric ferric chloride was prepared.The optimal treatment process was found to achieve the purpose of resource recovery and environmental harmlessness.KH2 PO4 as stabilizer could make polymeric ferric chloride more stable.When n(P)/n(Fe) in solution was 0.048 6,the product of polymeric ferric chloride did not precipitate for a month.The mass fraction of iron in the finished product of polymeric ferric chloride was 11.04% and the salinity was10.2%, which met the requirements of the standard HG/T 4672—2014 for water treatment agent polymeric ferric chloride.
引文
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[3]田莹莹,尹应武,罗伟.酸洗废液的资源化工艺研究[J].工业水处理,2009,29(10):89-91.
[4]鲁秀国,黄林长,段建菊,等.利用酸洗废液制备聚合氯化铁的实验研究[J].华东交通大学学报,2016,33(5):45-50.
[5]邓昌亮,刘翠霞.利用硫酸酸洗废液生产硫酸亚铁[J].化工环保,1998,18(3):150-153.
[6]王晋刚,马倩.钢铁厂酸洗废液无害化处置与资源化利用[J].山东化工,2017,46(21):184-185.
[7]郭绍东,梁恒,陈杰,等.超滤膜组合工艺处理含铁地下水的效能[J].中国给水排水,2014,30(17):5-8.
[8]张荣臻,胡勤海,裴毓雯,等.加盐蒸馏回收盐酸和混凝剂制备技术资源化利用盐酸酸洗废液[J].环境工程学报,2014,8(11):4782-4787.
[9]肖娟宜,丁德才,王权永,等.利用钢铁盐酸酸洗废液在填料塔中制备FeCl3[J].化工环保,2013,33(1):59-62.
[10]张惠欣,谢端端,王培培,等.微波氧化共沉淀法处理废酸液制备纳米铁氧化物[J].无机盐工业,2018,50(1):62-65.
[11]王猛,杨帆,崔世海.酸性氯化亚铁废水的处理与资源化研究[J].南京师大学报:自然科学版,2012,35(3):52-55.
[12]邸万山.高纯氧化铁红的快速制备[J].科技创新导报,2015(30):113-114.
[13]陈炎,程洁红.黄钠铁矾法氧化去除废锂电池硫酸浸出液中的铁[J].化工环保,2017(6):688-692.
[14]王红宇.高浓度聚合氯化铁絮凝剂的应用基础研究[D].杭州:浙江大学,2004.
[15]胡文华,吴慧芳,孙士权.过氧化氢预氧化去除受污染地下水中铁、锰的试验研究[J].水处理技术,2011,37(1):73-75.