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《粒度對(duì)高鐵三水鋁石型鋁土礦燒結(jié)性能和燒結(jié)礦顯微結(jié)構(gòu).pdf》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第29卷第2期礦冶工程V0I．29№22009年04月蕾ⅡNGANDM匝TALLURGICALENGINEERGApril2009粒度對(duì)高鐵三水鋁石型鋁土礦燒結(jié)性能和燒結(jié)礦顯微結(jié)構(gòu)的影響①朱忠平，姜濤，黃柱成，李光輝，張?jiān)?，莊劍嗚(中南大學(xué)資源加工與生物工程學(xué)院，湖南長(zhǎng)沙410083)摘要：以某高鐵三水鋁石型鋁土礦為原料，研究了鋁土礦粒度對(duì)燒結(jié)礦產(chǎn)質(zhì)量指標(biāo)的影響。結(jié)果表明，原料的平均粒度增加，燒結(jié)礦轉(zhuǎn)鼓強(qiáng)度和成品率均降低。當(dāng)平均粒度為1．6～2．4mm時(shí)，垂直燒結(jié)速度大于30mm／min，利用系數(shù)大于1．3t／(m·h)，轉(zhuǎn)鼓強(qiáng)度大于68．5％，成品率大于80．
2、0％，平均粒度在1．8mm左右時(shí)垂直燒結(jié)速度和利用系數(shù)達(dá)到最大值。原料的粒度對(duì)燒結(jié)礦礦相影響不大，但對(duì)礦物組成有影響。燒結(jié)礦粘結(jié)相主要由含鋁硅的鐵酸鈣和含鐵硅的鋁酸鈣組成，當(dāng)粘結(jié)相中鋁鐵原子比AL／(Al+Fe)小于0．2時(shí)形成鐵酸鈣；當(dāng)AL／(Al+Fe)比值大于0．2時(shí)形成鋁酸鈣。平均粒度增加，燒結(jié)礦中鐵酸鈣含量減少，鋁酸鈣增加，鐵酸鈣由針狀、片狀向不定形狀發(fā)展。鐵酸鈣的含量及鐵酸鈣的形狀決定燒結(jié)礦強(qiáng)度。關(guān)鍵詞：粒度；高鐵i水鋁石型鋁土礦；燒結(jié)性能；顯微結(jié)構(gòu)中圖分類號(hào)：TF521，TF821文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：0253—6099(2009)02—0050—
3、05EfectsofGrainSizeonSinteringPropertiesofHighIronTrihydrateBauxiteandSinterMicrostructureZHUZhong-ping，JIANGTao，HUANGZhu—cheng，LIGuang—hui，ZHANGYuan-bo，ZHUANGJian-ming(SchoolofMineralsProcessing&Bioengineering，CentralSouthUniversity，Changsha410083，Hunan，China)Abstract：Theeffectofgrai
4、nsizeofthebauxiteonthesinteringperformancewasstudiedbyusingahighirontrihydratebauxiteasrawmateria1．Theresultsshowedthatthetumblerstrengthandproductionyieldofthesinterdecreasedwiththeincreasingofaveragesizeoftherawmateria1．Whentheaveragesizewas1．6～2．4mm．theverticalsinteringspeedwasmore
5、than30mm／min．theutilizationtoemcientwasmorethan1．3t／(m·h)，thetumblerstrengthwasmorethan68．5％andtheproductionyieldwasmorethan8O．0％．Whentheaveragesizewasabout1．8mm．theverticalsinteringspeedandutilizationeoemcientattainedthemaximum．Grainsizeoftherawmaterialhadlittleinfluenceonthesintermi
6、neralographybuthadinfluenceonthemineralcomposition．Thebondphaseofthesinterwascomposedofcalci—umferriteandcalciumaluminate．CalciumfetriteformedwhentheatomicratioA1／(Al+Fe)ofthesintermaterialwaslessthan0．2whilecalciumaluminateformedwhentheatomicratioA1／(Al+Fe)wasmorethan0．2．Thecontentof
7、calciumferritedecreasedandthecontentofcalciumaluminateincreasedinthesinterwithfheincreasingoftheaveragesize．Calciumferritedevelopedfromneedleandflakecalciumferritetoamorphousones．Thesinterstrengthwasdeter．minedbythecontentandfoITnofcalciumferrite．Keywords：grainsize；highirontrihydrateb
8、auxit
