利用锌窑渣直接制备聚硅酸硫酸铁锌絮凝剂的研究
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摘要
以锌窑渣为研究对象,先后用硫酸溶液和氢氧化钠溶液浸出锌窑渣中的锌、铁和二氧化硅,再制备絮凝剂聚硅酸硫酸铁锌。考察了反应温度、硫酸质量分数、球磨细度、液固比和反应时间对锌窑渣中锌和铁浸出率的影响,在优化的工艺条件下,铁和锌的浸出率分别为89.67%、97.48%。用絮凝剂聚硅酸硫酸铁锌净化试验废水,可使废水中的COD_(Cr)、浊度和色度的去除率分别达75.24%、83.61%、85.97%,水质指标达到国家标准《污水综合排放标准》中一级标准要求。
Taking zinc kiln slag as the research object,zinc,iron and silicon dioxide in zinc kiln slag were leached successively with sulfuric acid solution and sodium hydroxide before preparing flocculant polyferric zinc silicate sulfate.The effects of reaction temperature,sulfuric acid concentration,ball grinding fineness,liquid-solid ratio and reaction time on the leaching rates of zinc and iron in zinc kiln slag were investigated.Under the optimized process conditions,the leaching rates of iron and zinc were 89.67% and 97.48% respectively.The removal rates of COD_(Cr),turbidity and chroma could reach 75.24%,83.61% and 85.97% respectively by using flocculant polyferric zinc silicate sulfate to purify the test wastewater.The water quality indexes all met the first level standard requirements in the national standard " Comprehensive Wastewater Discharge Standard".
Taking zinc kiln slag as the research object,zinc,iron and silicon dioxide in zinc kiln slag were leached successively with sulfuric acid solution and sodium hydroxide before preparing flocculant polyferric zinc silicate sulfate.The effects of reaction temperature,sulfuric acid concentration,ball grinding fineness,liquid-solid ratio and reaction time on the leaching rates of zinc and iron in zinc kiln slag were investigated.Under the optimized process conditions,the leaching rates of iron and zinc were 89.67% and 97.48% respectively.The removal rates of COD_(Cr),turbidity and chroma could reach 75.24%,83.61% and 85.97% respectively by using flocculant polyferric zinc silicate sulfate to purify the test wastewater.The water quality indexes all met the first level standard requirements in the national standard " Comprehensive Wastewater Discharge Standard".
引文
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[3]王红军,刘智勇,刘志宏,等.湿法炼锌窑渣铁精矿中有价组分浸出行为及其机理[J].Transactions of Nonferrous Metals Society of China,2017,27(4):901-907.
[4]李静,牛皓,彭金辉,等.锌窑渣综合回收利用研究现状及展望[J].矿产综合利用,2008(6):44-48.
[5]刘睿,白红娟,程芳琴,等.复合絮凝剂对焦化废水中苯酚强化混凝去除性能研究[J].无机盐工业,2018,50(5):63-67.
[6]曾经,彭青林.催化湿式氧化技术处理高浓度有机废水催化剂研究[J].环境污染与防治,2009(8):37-40.
[7]孙萍萍,隋欣.电化学氧化技术处理有机废水的研究[J].当代化工,2015,44(11):2625-2628.
[8]文春俊,李国华.混凝-Fenton试剂法处理苯胺废水的研究[J].四川建材,2014,40(4):105.
[9]何宏国,孙婷,高晓明.Fenton试剂法处理炼油污水的影响因素研究[J].延安大学学报(自然科学版),2013,32(1):51-54.
[10]胡小兵,饶强,叶星,等.焦化废水活性污泥法处理中微型动物群落及其与处理性能之间的关系[J].环境科学学报,2015,35(9):2780-2789.
[11]武恒平,韦朝海,任源,等.焦化废水预处理及其特征污染物的变化分析[J].化工进展,2017,36(10):3911-3920.
[12]刘睿,白红娟,程芳琴,等.复合絮凝剂对焦化废水中苯酚强化混凝去除性能研究[J].无机盐工业,2018,50(5):63-67.
[13]杨茹霞,孙慧芳,张国栋,等.聚合氯化铝靶向混凝去除焦化废水难降解有机物的研究[J].工业用水与废水,2017,48(6):16-21.
[14]兴虹,胡筱敏,田亚赛,等.聚硅硫酸铁铝絮凝剂的制备及混凝处理焦化废水的试验研究[J].安全与环境学报,2014,14(1):207-211.
[15]卢长海.挥发窑处理含锌浸出渣挥发率及工艺节能探究[J].有色矿冶,2011,27(2):34-37.
[16]聂登攀,刘安荣,王在谦,等.含稀土中低品位磷矿石盐酸酸解工艺研究[J].化工矿物与加工,2015,44(7):7-9.