简介:Industrialapplicationofmicrowave,asaheatingsourceformaterialprocessing,wasreviewed.Thefeasibilityofcarbothermicreductionofzincoxideconcentrate,aswellastheeffectofoperatingparameterswasinvestigated,usingahomestylemicrowaveovenat2.45GHz.Zincoxideconcentratedoesnoteffectivelyabsorbmicrowaveenergy,whileanysourceofcarbon,whichisusedasthereductionagent,absorbsmicrowaveenergyverywell.Inthisrespectcokebreezewasfoundtobethebest,andthus,cokewasusedbothasthereducingagentandtheabsorbentofmicrowaveenergy.Itwasalsofoundthatanyincreaseinthecarboncontentandsize,increasesthereductionrate.Increasingthemicrowavepowerandthesizeofthesamplecouldalsoincreasethereductionrate.Furtherinvestigationshowsthatwhenzincoxideisexposedtothemicrowaveforsometime,therateofthereductionbyconventionalmethodincreases.
简介:ThetreatmentoftheGacuncomplexCu-PbbulkconcentratewithhighZn,Ag,etc.,byoxygenpressureacidleachingwasstudied.Theprimarycopperandleadmineralsintheconcentratearetetrahedriteandgalena.Thetreatmentoftetrahedritewasrarelystudied,andmostofsilveroccurredinthemineraltoo.Theoptimumoperatingparametersofoxygenpressureacidleachingwereestablishedbyconditionaltests.Undertheseparameters,theresultofpilotscaletestshowedthattheleachingpercentagesofcopperandzincwereseparatelyashighas98.9wt.%and94.9wt.%,whileleadandsilverweretransformedintosulfateandsulfideprecipitations,respectively.Thecopperandzincinlixiviumwerereclaimedbyextraction-electrowinningandpurification-electrowinning,respectively,andtheleadandsilverintheresiduewerereclaimedseparatelybycarbonatetransformation-silicofluoricacidleachingandthiourealeaching.
简介:CaTiO3的形成行为在钛铁矿的electro-deoxidization期间专注准备FeTi合金被实验和模拟调查。结果显示中间的产品的形成和分解,CaTiO3,在钛铁矿的electro-deoxidization期间是不可避免的步专注。CaTiO3能在电气化学的过程期间通过熔融的盐和电气化学反应的hydrolyzation被产生。为CaTiO3的产生的主要原因在阴极是在从熔融的盐和TiO2的Ca2+之间的电气化学反应。与electro-deoxidization继续,CaTiO3是进一步的electrolyzed形成钛低值氧化物。当在由在sintering期间增加CaCO3的阴极的CaTiO3形式处理时,当前的效率能被改进。