資源描述：
《離心選礦機(jī)提純硅藻土的中試研究.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、Vo1．22，No．10第22卷第1O期中國(guó)礦業(yè)CHINAMININGMAGAZINE0ct．2O132013年1O月離心選礦機(jī)提純硅藻土的中試研究楊小平，孫志明，毛俊，鄭水林(中國(guó)礦業(yè)大學(xué)(北京)化學(xué)與環(huán)境工程學(xué)院，北京100083)摘要：針對(duì)天然優(yōu)質(zhì)的硅藻土資源逐漸減少而需求量逐年增加的現(xiàn)狀，提出一種適用于工業(yè)化生產(chǎn)的用離心選礦機(jī)提純硅藻土的方法。探討了離心選礦機(jī)的圓筒錐角、圓筒轉(zhuǎn)速、給料濃度、給料量和給料時(shí)間對(duì)硅藻土分選的影響，并通過(guò)響應(yīng)面試驗(yàn)研究了這些因素之間的相關(guān)性，進(jìn)一步優(yōu)化了離心分選機(jī)的工況。結(jié)果表明：給料量對(duì)精礦SiO含量和尾礦濃度的影響均較大；當(dāng)
2、離心選礦機(jī)的圓筒錐角為0．5。、轉(zhuǎn)速為856r／min、給料濃度為24．66、給料量為14L／min、給料時(shí)間為90s時(shí)，精礦SiOz含量為87．5，尾礦濃度為6．98。對(duì)最優(yōu)組合進(jìn)行了連續(xù)分選試驗(yàn)，得到精礦中含SiO2為87．61、尾礦濃度為6．14。硅藻精土通過(guò)SEM分析發(fā)現(xiàn)，硅藻殼體的孔隙堵塞得到明顯改善；經(jīng)圖像分析儀檢測(cè)，硅藻土礦經(jīng)過(guò)中試線選礦后，硅藻破損率變化小于5。論文的結(jié)論為硅藻土生產(chǎn)線的設(shè)計(jì)、生產(chǎn)和設(shè)備操作提供了理論指導(dǎo)。關(guān)鍵詞：硅藻土；提純；離心選礦機(jī)；響應(yīng)面試驗(yàn)中圖分類號(hào)：TD975．4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1004—4051(2013)10
3、～0091—05Pilot-scalestudyonpurifyingthediatomiteusingthecentrifugalseparatorYANGXiao—ping，SUNZhi—ming，MAOJun，ZHENGShui—lin(SchoolofChemicalandEnvironmenta1Engineering，ChinaUniversityofMiningandTechnology(Beijing)，Beijing100083，China)Abstract：Consideringthesituationthatthenaturalquality
4、resourcesaregraduallydecreasingbutthedemandisincreasingyearbyyear，thispaperpresentsanindustrializedbeneficiationmethodfordiatomaceousearthswhichisbasedonthesizedifferencebetweenthediatomandtheimpureminerals，thecoarseclassofthescoureddiatomiteoreslurryiswipedoutbysieving，therestslurryi
5、spurifiedbythecentrifugalseparator．Theeffectsoftheconeangle，drumspeed，feedconcentration，feedflowrateandfeedtimeonthediatomitebeneficiationareinvestigated，andthecorrelationofthesefactorsisanalyzedthroughtheResponseSurfaceExperimentdesigntOfurtheroptimizetheworkingconditionsofthecentrif
6、ugalseparator．TheresultsshowthatthefeedflowratehasmuchinfluencingontheSiO2contentinthediatomiteconcentrateandthetailingsconcentration，andthattheSiO2contentinthediatomiteconcentrateis87．5，thetailingsconcentrationis6．98whentheconeangleis0．5。，thedrumspeedis856r／min，thefeedconcentrationiS
7、24．66，thefeedflowrateiS14L／minandthefeedtimeiS90seconds．Thecontinuouspilot—scaleexperimentwiththeoptimalcombinationabovehastheresultsthattheSiO2contentinthediatomiteconcentrateis87．61％andthetailingsconcentrationis6．14．TheSEMpictureofthediatomiteconcentrateshowsheblockedporeswithsomede
8、posit
