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1、河北理工大學(xué)輕工學(xué)院COLLEGEOFLIGHTINDUSTRY,HEBEIPOLYTECHNICUNIVERSITY畢業(yè)論文論文題目：葉蠟石尾礦的除鐵增白研究學(xué)生姓名:學(xué)號(hào):專業(yè)班級(jí):學(xué)部：材料化工部指導(dǎo)教師:摘要葉蠟石是一種含水的鋁硅酸鹽，屬于層狀硅酸鹽礦物，具有良好的機(jī)械加工性，熱輻射性，耐高溫性以及化學(xué)穩(wěn)定性?？捎米髂突鸩牧稀⑻沾稍?、工藝品和裝飾材料、金剛石制造業(yè)的高溫傳壓介質(zhì)、作玻璃纖維、作填料、農(nóng)藥殺蟲劑的載體等。但由于葉蠟石原礦中含有一定的雜質(zhì)元素，以有機(jī)質(zhì)、含鐵礦物為主，嚴(yán)重影響了葉蠟石的純度與白度，制約了葉蠟石的應(yīng)用。開發(fā)合適的葉蠟石粉體增白技術(shù)，并開發(fā)出一系列葉蠟石深
2、加工產(chǎn)品，是提升行業(yè)技術(shù)水平，將資源優(yōu)勢(shì)轉(zhuǎn)化為經(jīng)濟(jì)優(yōu)勢(shì)的必由之路。本課題研究葉蠟石粉體氯化鍛燒增白。由于直接鍛燒效果并不理想，在10009下鍛燒2h,只能將白度為71%的葉蠟石原礦粉提高到82%左右。然而氯化鍛燒具有明顯的增白效果，而且降低了鍛燒溫度。在葉蠟石原礦中添加0.9%的氯化鍍，在900°C鍛燒2h,可以將葉蠟石的白度由最初的71.4%提高至90.4%o利用此氯化鍛燒方法，可顯著提高原尾礦的白度，得到較高品質(zhì)的葉蠟石產(chǎn)品。關(guān)鍵詞：葉蠟石，白度，氯化鍛燒，除鐵AbstractPyrophylliteisahydratedaluminumsilicate,islayeredsilica
3、temineral,withgoodmachinability,andthermalradiation,heatresistanceandchemicalstability.Itcanbeusedasrefractories,ceramicrawmaterials,handicraftsanddecorativematerials,hightemperaturediamondindustrypressuretransmissionmedium,asglassfibersforfilling,pesticidespesticidecarrier-However,aspyrophyllitei
4、scontainingsomeimpurityelementstoorganicmatter,ironmineralsaremainlyaseriousimpactingonthepurityandwhitenessofpyrophyllite,restrictedtheapplicationofpyrophyllite?Thedevelopmentofappropriatepyrophyllitepowderiswhiteningtechnology,anddevelopingaseriesofpyrophylliteprocessingproducts,istoraisethetech
5、nologicallevelofindustries,theresourceadvantagebecomesintoeconomicadvantageoftheonlyway.Thisstudyisthedirectpyrophyllitepowdercalcinedandchlorinatedwhitening.Astheorganicmattercontentisnottoohigh,thedirectburningeffectisnotideal,calciningat1000°Cfor2htonlythewhitenessoftheoriginalpyrophyllitefrom7
6、1%to82%oftheslag.Itcalcinedchlorideobviouswhiteningeffect,butalsoitreducesthesinteringtemperature.Thesubjectfoundachloridesaltforthebestresults-Addinginpyrophylliteare0.9%ammoniumchloride,calcinedafC^OiO2h,itcanwhitenesspyrophyllitefromtheinitial71.4%to90.4%.Calcinedchlorideusingthismethodthatcans
7、ignificantlyimprovethewhitenessoftheoriginaltailings,getinghigh-qualitypyrophylliteproducts.KeyWords：Pyrophyllite,Whiteness,Calcinedchloride,Ironremoval目錄引言1第一章綜述21.1葉蠟石簡(jiǎn)介21.1.1葉蠟石礦產(chǎn)資源的分布21.1.2葉蠟石的晶體結(jié)構(gòu)21.1.3葉蠟石的性
