铜闪速炉沉淀池锍沉降机理分析与流场温度场数值模拟研究

《铜闪速炉沉淀池锍沉降机理分析与流场温度场数值模拟研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、中南大学硕士学位论文铜闪速炉沉淀池锍沉降机理分析与流场温度场数值模拟研究姓名：余建平申请学位级别：硕士专业：工程热物理指导教师：周萍20060401本文对沉淀池内大粘度熔体的数值计算进行了有益的尝试，建立了描述熔体流场及温度场的数学模型，并在商业软件CFX4．3平台上，对入口边界条件进行了二次开发，模拟了熔体散落于沉淀池的真实状态，实现了沉淀池流场及温度场数值模拟；通过对2个放渣口与4个放锍口的不同组合工况下的沉淀池内流场与温度场的数值模拟，并以速度与温度分布均匀、减少炉结为目标，提出了应优先采用靠近渣口的铜锍口放锍的优化操作措施；对典型炉结工况下沉淀池内熔体流

2、场与温度的进行了数值模拟，结果表明：沉淀池内正常量的炉结，不会对沉淀池内熔体流动态势造成太大影响，且炉结使熔池内流场趋于均匀，但同时显著提高熔体流速，缩短锍液滴沉降时间，其综合结果是炉结的存在不利于渣锍分离。关键词：沉淀池，炉渣粘度，数值模拟，锍沉降ⅡABSTRACTThecopperflashsmeltingtechnologyhasattractedgreatattentionsofcopper-smeltingprofessionalsworldwidewithitstechnicaladvantagesandbeRereconomicbenefits，a

3、ndfurtheropenedaneweraofhighertechnologylevelincopperindustrysincetheworkingsystemof“fourhigh'’hasbeenputinpractical．Howeveralongwimenhancedsmeltingintensityandsmeltingnorms．theproblemofcopperlosinginslagbecomesmoreserious．Asoneofthemainequipmentofflashfurnace，thestructureandoperatio

4、nruleofseRlerhasasignificanteffectonthecopperloseinslag．Thusitisnecessarytosystemresearchsomebasicproblems，suchasthep11ysicalandchemicalform，andthedistributionofvelocityandtemperatureofmeltinthesettler．XRD(X-rayDiffraction)，oremicroscopyanalysis，SEM(scanningelectronmicroscope)，chemic

5、alelementanalysisandchemicalphaseanalysismethodwereusedtoqualitativelyandquantitativelyanalyzethemineralcompositionoftheiJlletmeltandtheoutletslagoftheseRIer．TheresultsshowthatthereiShigherconcentrationofFe304intheinletmelt，whichisthemainreasonofformingthefrozenmeltintheseRler．Copper

6、sulfideisthemainlycompositionofcopperloseinslagandisintheformof1211一settlingmareparticleswithdiametersmO．0017-4)．0052mm．Therefore．itisobviousthatacceleratingthesettlingofmaReparticleswithsmalldiameteriSthemainmeRnstoreducethecopperinslag．Themeltparticlemassandsizedistributionalongrad

7、ialdirectionattheinletcrosssectionweremeasured．TheresultsindicatethattheaveragediameterofmeltparticlesattheseRlerinletis849．51am,andtheparticlesmainlyfallintotheareaaroundtheshaftinacircleofdiameterabout3m．Basedontheprinciplethatthemeltflowlengthinthehorizontalpipelineisininverseprop

8、ortiontothes