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1、攀枝花鈦渣流化焙燒實(shí)驗(yàn)研究韓可喜1,葉恩東1,陳滬飛2,廖雪峰2,劉錢錢2,和飛2,陳菓*,31釩鈦資源綜合利用國家重點(diǎn)實(shí)驗(yàn)室,攀鋼集團(tuán)研究院有限公司,四川攀枝花6170002昆明理工大學(xué)冶金與能源工程學(xué)院,云南昆明6500933云南民族大學(xué)化學(xué)與環(huán)境學(xué)院,云南昆明650500摘要:針對(duì)用于生產(chǎn)特種焊接材料的鈦系原料對(duì)其品質(zhì)要求,進(jìn)行了流態(tài)化焙燒攀枝花鈦渣的實(shí)驗(yàn)研究。本文考察了焙燒溫度為950℃,空氣流量為3.3m3/h,螺旋推料器頻率為45.4Hz條件下,流化焙燒對(duì)鈦渣品質(zhì)的影響。結(jié)果表明,由于焙燒過程中細(xì)顆粒直接被吹出流化床腔體
2、而被冷卻水吸收,流化焙燒后,鈦渣顆粒變粗,粒度增大;XRD及Raman分析顯示,攀枝花鈦渣經(jīng)流化氧化焙燒后,鈦渣中發(fā)生晶型轉(zhuǎn)變,610cm-1處振動(dòng)特征峰發(fā)生紅移,低價(jià)鈦轉(zhuǎn)變成高價(jià)鈦,金紅石型TiO2長(zhǎng)大增多。關(guān)鍵詞:攀枝花鈦渣;電焊條;流化焙燒;金紅石型TiO2ExperimentalinvestigationonfluidizedroastingofPanzhihuatitaniumslagHanKexi1,YeEndong1,ChenHufei2,LiaoXuefeng2,LiuQianqian2,HeFei2,ChenGuo
3、*,31StateKeyLaboratoryofComprehensiveUtilizationofVanadiumandTitaniumResources,PanzhihuaIronandSteelGroupResearchInstituteCo.Ltd,Panzhihua617000,China2FacultyofMetallurgicalandEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,China3FacultyofChemistryand
4、Environment,YunnanMinzuUniversity,Kunming650500,ChinaAbstract:Inordertomeetthequalityrequirementsofthetitaniummaterialsusedintheproductionofspecialweldingmaterial,theexperimentalstudyoffluidizedbedroastedofPanzhihuatitaniumslagwascarriedout.Inthispaper,investigatedonth
5、einfluenceoffluidizedroastedontitaniumslagqualityundertheconditionoftheroastedtemperature,theairflowrateandthescrewpusherfrequencywere950℃,3.3m3/hand45.4Hz,respectively.Theresultsshowedthatthefineparticlesweredirectlyblownoutofthefluidizedbedandwereabsorbedbythecooling
6、water.Afterthefluidizedroasted,thetitaniumslagparticlesbecomesthickerandtheparticlesizeincreases;XRDandRamananalysisrevealedthatafterthefluidizedbedoxidationroastingofPanzhihuatitaniumslag,thecrystaltransformationoccurredinthetitaniumslag,thevibrationcharacteristicpeak
7、of610cm-1wasredshifted,andthelowvalenttitaniumturnedintohighvalenttitaniumandtherutileTiO2increased.Keywords:Panzhihuatitaniumslag;electricweldingrod;fluidizedroasting;rutile1前言二氧化鈦以三種形式的晶型存在于自然界中:銳鈦型、金紅石型及板鈦礦[1-2]。隨著天然金紅石資源的日漸枯竭,鈦渣逐漸成為制備人造金紅石的重要原料[3-5]。我國攀西地區(qū)鈦資源儲(chǔ)量豐富,據(jù)
8、報(bào)道,我國90.34%的鈦鐵礦資源儲(chǔ)存在攀枝花地區(qū),但其礦石成份復(fù)雜,礦石經(jīng)選礦工序后能得到TiO2品位低的攀枝花鈦渣[6-8]。攀枝花鈦渣主要由黑鈦石相和玻璃相組成,黑鈦石相主要由鈦鐵氧化物組成,固溶部分鎂;玻璃相主要由CaO,Si