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时间:2020-03-25
《工业硫酸锰深度除钙、镁、铁的试验研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第33卷第3期矿冶工程V0J.33№32013年o6月MININGANDⅣ匝IALLURGICALENGINEERINGJune2013工业硫酸锰深度除钙、镁、铁的试验研究①包新军一,王志坚,刘吉波,苏正夫,田思远,周德壁,王洪恩(1.湖南稀土金属材料研究院,湖南长沙41(~26;2.中南大学化学化工学院,湖南长沙410083;3.武汉理工大学材料科学与工程学院,湖北武汉43oo7o)摘要:研究了工业MnSO净化除去钙、镁和铁的工艺。具体工艺包括:采用先溶成浆再两步加料的方式,向MnSO溶液中加入MnF:浆料净化溶液中的c、Mg“。加入适量的高锰酸钾优先氧化Fe后,再氧化溶液中1%的
2、Mn生成活性MnO:,从而有效吸附沉淀CaF2、MgF和水解产物Fe(OH),。试验结果表明:控制pH为4,反应温度90℃,搅拌时间2h,当硫酸锰的浓度为300g/L时,钙、镁和铁的净化率分别高达98.8%、97.25%和99.92%。最后以净化除杂后的硫酸锰为锰源,采用液相共沉淀法合成MnO。SEM和XRD表征表明,合成的MnO产品具有球形形貌,衍射峰峰型较尖锐,属于四方晶系d—MnO。关键词:硫酸锰;净化除杂;氟化锰;二氧化锰中图分类号:TF111文献标识码:Adoi:10.3969/j.issn.0253-6099.2013.03.024文章编号:0253—6099(2013)
3、03—0o90—04ExploratoryResearchonDeepRemovalofCa(Ⅱ)、Mg(Ⅱ)andFe(Ⅱ)fromIndustrialManganeseSulfateBAOXin-jun,,WANGZhi-jian,LIUJi.bo,SUZheng—fu,TIANSi—yuan,ZHOUDe-bi,WANGHong-en(1.HunanRare—earthMetalResearchInstitute,Changsha410026,Hunan,China;2.SchoolofChemistryandChemicalEngineering,CentralSouthUn
4、iversity,Changsha410083,Hunan,China;3.SchoolofMaterialsScienceandEngineering,WuhanUniversityofTechnology,Wuhan430070,Hubei,China)Abstract:AninvestigationwasmadeonanewpurificationprocesstoremoveCa(II)、Mg(Ⅱ)andFe(I1)fromindustrialmanganesesulfate.The.wholeprocedureincludedthefollowingstages:thepr
5、ecipitatingagentMnF2wasaddedtoMnSO4solutiontoremoveCa2andMg¨throughamethodofdissolvingMnF2intopulpfollowedbytwo-stepchar~ng;acertainamountofpotassiumpermanganatewasintroducedtopreferentiallyoxidizeFeandthenonepercentofMnoxidizedintoMnO2,whichcouldeffectivelyadsorbandprecipitateMgF2andCaF2andhyd
6、rolyzeFe(OH)3.ExperimentresultsshowedthatatpHof4,temperatureof90℃,withstirringtimeof2handMnSO4concentrateof300g/L,theprecipitationratesofCa,MgandFewere98.8%,97.25%and99.92%,respectively.Finally,MnO2productsweresuccessfullypreparedbyachemicalCO—precipitationmethodwithpre-purifiedmanganesesulfate
7、asmanganesesource.X—raydifraction(XRD)andscanningelectronmicroscopy(SEM)characterizationprovedthattheobtainedMnO2productshadsphericalshapeandsharpX-raydiffractionpeaks,belongingtotetragonal仅-MnO2.Keywords:manganesesulfate;purifica
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