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1、中國(guó)科技論文在線http://www.paper.edu.cn蝕變巖型金礦尾礦火山灰性能的活化及應(yīng)#用研究11121*呂憲俊,房杰,吳蓬,譚明洋,曹曉強(qiáng)5(1.山東科技大學(xué)化學(xué)與環(huán)境工程學(xué)院,青島266590;2.金正大生態(tài)工程集團(tuán)股份有限公司復(fù)合肥料國(guó)家地方聯(lián)合工程研究中心,臨沂276700)摘要:以蝕變巖型金礦尾礦為主要原料,采用活性指數(shù)測(cè)定的方法,研究了粉磨細(xì)度、助磨劑、化學(xué)活化劑對(duì)尾礦火山灰性能的影響,通過對(duì)水化樣品的X射線衍射分析、電子探針分析,查明了尾礦在水泥水化中的作用,并對(duì)活化尾礦的應(yīng)用性能進(jìn)行了試驗(yàn)研究。研究結(jié)10果表明,機(jī)械粉磨能夠有效提高尾礦的火山灰性能,當(dāng)尾礦比表面積超
2、過400m2/kg以上時(shí),活性指數(shù)可達(dá)到65%以上,并且硬脂酸鈉助磨劑和氯化鈣活化劑的添加均有利于活性指數(shù)的提高;活化尾礦在水泥水化過程中主要起“晶核”作用,促進(jìn)水泥的水化,同時(shí)也會(huì)參與部分水化反應(yīng);當(dāng)活化尾礦摻量小于30%時(shí),可制備強(qiáng)度等級(jí)為32.5R的火山灰質(zhì)硅酸鹽水泥;當(dāng)活化尾礦摻量小于40%時(shí),可用于制備FCA03(JG/T266-2011)等級(jí)的發(fā)泡水泥。15關(guān)鍵詞:蝕變巖型金礦尾礦;機(jī)械粉磨;火山灰性能;火山灰質(zhì)水泥;發(fā)泡水泥中圖分類號(hào):TD985Activationandapplicationofpozzolanicpropertiesofalteredrocktypegoldt
3、ailings1112120LYUXianjun,FANGJie,WUPeng,TANMingyang,CAOXiaoqiang(1.CollegeofChemicalandEnvironmentalEngineering,ShandongUniversityofScienceandTechnology,Qingdao266590;2.National&LocalJointEngineeringResearchCenterforCompoundFertilizer,KingentaEcologicalEngineeringGroupCo.,Ltd.,Linyi276700)25Abstract
4、:Effectofgrindingfineness,grindingaidsandchemicalactivatoronthepozzolanicpropertiesofalteredrocktypegoldtailingswasstudied.BasedonX-raydiffractionanalysisandelectronprobemicroanalysis,theroleoftailingsincementhydrationwasidentified.Also,theapplicationperformanceofactivatedtailingsincementandfoamedco
5、ncretewasstudied.Theresultsshowthatmechanicalgrindingcaneffectivelyimprovethepozzolanicreactivityoftailings,andtheactivityindex30ismorethan65%whenspecificsurfaceareaismorethan400m2/kg.Sodiumstearategrindingaidsandcalciumchlorideactivatorwerebeneficialtoimprovetheactivityindexofthegroundtailings.Thea
6、ctivatedtailingsmainlyplayaroleof“crystalnucleus”topromotethehydrationofcement,andsometailingsparticlescanalsobehydratedincement.Theactivatedtailingscanbeusedasmajoradmixturestoprapareportland-pozzolanacementandfoamcement.Forthegroundandactivated35tailings,a32.5Rgradecementwaspreparedwhenitsaddition
7、islessthan30%,andaFCA03(JG/T266-2011)gradefoamcementwaspreparedwhenitsadditionislessthan40%.Keywords:goldtailings;mechanicalgrinding;pozzolanicproperties;portland-pozzolanacement;foamcement0引言[1,2]40火