氧化铁的制备和包覆分析研究 机械制造专业VIP免费

氧化铁的制备和包覆摘要随着高科技的快速发展和对新材料迫切需要，氧化铁制备技术及应用开发已经越来越得到重视。为此叙述了氧化铁制备方法，分析了不同制备工艺优缺点。采用酸浸法来处理高硅铁尾矿，从而制备工业原料Fe2O3，其最佳工艺条件是:反应时间90min，反应温度在100℃，铁尾矿中粒径为6.19µm，其盐酸的体积分数为60%。制备Fe2O3产率(所得产品中Fe2O3的质量占原来铁尾矿中Fe2O3质量的比例)为79%，其品质符合国标中氧化铁红颜料要求。采用凝胶-溶胶法在氧化铁的表面包覆纳米二氧化硅来对其进行改性。使用红外光谱来确定二氧化硅是否已经包覆于氧化铁的表面。氧化铁被纳米二氧化硅包覆后，其表面有纳米材料特性，提高了氧化铁的疏水性和耐热性，所以极大地增强涂层耐腐蚀性能。关键词：氧化铁；高硅铁尾矿；制备；纳米二氧化硅；包覆AbstractWiththerapiddevelopmentofhightechnologyandnewmaterialsforurgentneed,ironoxidepreparationtechnologyandapplicationdevelopmentalreadymoreandmoregetattention.Forthisdescribestheironoxidepreparationmethod,thispaperanalyzestheadvantagesanddisadvantagesofdifferentpreparationprocess.Theacidleachingtodealwithhighferrosilicontailings,andindustrialrawmaterialspreparationFe2O3,theoptimumtechnologicalconditionsis:90minreactiontime,reactiontemperaturein100℃,theirontailingsofparticlesizeof6.19µm,itsvolumefractionofhydrochloricacidfor60%.PreparationFe2O3yield(incomeinthequalityoftheproductsofFe2O3forirontailingsofFe2O3qualityratio)was79%,thequalityofironoxideredpigmentoxidationmeetthenationalrequirements.Thegel-solmethodinthesurfaceoftheironoxidecoatedthenano-silicaonmodification.Useinfraredspectrumtodeterminewhetherthesilicacoatedinironoxidehasthesurface.Ironoxidecoatedbynano-silica,itssurfaceisnanomaterialcharacteristics,improvetheironoxideofhydrophobicandheatresistance,sogreatlyenhancecoatingcorrosionresistanceperformance.Keywords:ironoxide;Highferrosilicontailings;Preparation;Nano-silica;coated目录摘要.....................................................................................................................................IAbstract...............................................................................................................................II1引言..................................................................................................................................12氧化铁制备的方法..........................................................................................................22.1干法........................................................................................................................22.1.1热分解法......................................................................................................22.1.2焙烧法..........................................................................................................22.1.3鲁式法(Ruthner)..........................................................................................32.2湿法........................................................................................................................32.2.1空气氧化法..................................................................................................42.2.2溶胶−凝胶法(Sol-gel).................................................................................42.2.3水解法..........................................................................................................52.2.4包核法..............................................