流程结构对中低品位磷矿石的浮选研究

贵州大学本科毕业论文第I页贵州大学本科毕业论文（设计）诚信责任书本人郑重声明：本人所呈交的毕业论文（设计），是在导师的指导下独立进行研究所完成。毕业论文（设计）中凡引用他人已经发表或未发表的成果、数据、观点等，均已明确注明出处。特此声明。论文（设计）作者签名：日期：贵州大学本科毕业论文第II页流程结构对中低品位磷矿石的浮选研究摘要贵州织金含稀土磷矿是以碳酸盐为主的大型含稀土胶磷矿矿床资源，本课题以该矿床中某矿层样品作试验原料，以目前选别磷矿常用的硫酸、磷酸作抑制剂，NS作捕收剂作了相应流程结构的研究，并研究了以新型药剂——NS-1（磷酸与硝酸按一定浓度配制而成）作抑制剂，NS作捕收剂的流程。研究结果表明：（1）以硫酸作抑制剂，NS作捕收剂，在磨矿细度-0.074mm占92.6%的情况下，采用一粗二精一扫、中矿再选的流程进行浮选实验，可将P2O5的品位从原来的25.17%提高到32.44%，回收率达89.88%，MgO从2.52%降至1.14%。（2）以磷酸作抑制剂，NS作捕收剂，磨矿细度-0.074mm占93.7%的条件下，采用一粗一精、中矿返回的闭路流程进行浮选实验，可将P2O5的品位从25.17%提高至35.44%，回收率达92.65%，MgO从2.52%降至0.64%。（3）以NS-1作抑制剂，NS作捕收剂，磨矿细度-0.074mm占93.7%的条件下，采用一粗一精、中矿返回的闭路流程进行浮选实验，能使P2O5的品位从25.17%提高至33.68%，回收率达93.36%，MgO从2.52%降至0.78%。关键词:磷矿浮选流程结构贵州大学本科毕业论文第III页ProcessoflowgradeadhesivephosphaterockstructureofflotationresearchAbstractGuizhouzhijincontainingrarephosphateismainlycontainscarbonatelargedeposits,rareearthgluephosphateresourceswiththedepositinthistopicthroughasampletestmaterials,atpresentcommonlychosenphosphateinhibitor,sulfuricacid,phosphoricacidNSofcollectorforthecorrespondingprocessofstructure,andresearchesonthenewpotionacid,nitricacidandwater(accordingtocertainconcentrationprepared)inhibitors,NSofcollectorfortheprocess.Researchresultsshowthat:(1)sulfuricacidasinhibitors,NSofcollector,asingrindingfineness-0.074mm,underthesituationofstabilityforusingacoarse2fineasweepofthemiddlings,chooseflotationtests,theprocesscanbefromtheoriginaltasteofP2O5,25.17%32.44%toimproverecoveryof89.88%MgO,2.52%from1.14%dropped.(2)withphosphoricacidinhibitors,NSofcollectorforgrindingfineness,0.074-theconditionsofmm93.7%,usingathickonefine,middlingsclosed-circuitprocessreturns,willbeflotationtestsfrom25.17%improvethegradeofP2O5,recoveryof35.44%to92.65%MgO,2.52%fellfromwhilejust0.46%.(3)byacidwaterinhibitors,NSofcollectorforgrindingfineness,0.074-theconditionsofmm93.7%,usingathickonefine,middlingsclosed-circuitflowbackofflotationtests,canmakethegradeofP2O5,25.17%from33.68%toincreasetherecoveryrateoflead,from2.52%MgOto0.78%.Keywords:Phosphateflotationprocessstructures贵州大学本科毕业论文第IV页目录摘要...........................................................................................................................................................IIABSTRACT.........................................................................................................................................................III第一章绪论··················································································································1第一节磷元素简介..........................................................................................................................................1第二节世界磷矿资源概况............................................................................................................................1第三节贵州磷矿资源概况............................................................................................................................3第四节磷矿的主要选矿工艺现状................................................................................................................4第五节含稀土磷矿的选矿及综合利用现状................................................................................................5第二章织金含稀土胶磷矿浮选工艺的选择.············································································6第一节试样的采取和制备...............................................................................................................................6第二节试样粒度筛析.......................................................................................................................................7第四节浮选工艺的选择...................................................................................................................................9第五节本课题研究目的及意义.......................................................................................................................9第三章反浮选试验条件确定····························································································10第一节反浮选原理......................................................................................................................................10第二节磨矿细度试验..................................................................................................................................10第四节磨矿细度对粗选的影响....................................................................................................................12第五节抑制剂、捕收剂对粗选的影响......................................................................................................13第六节矿浆浓度及浮选时间对粗选的影响..................................................................................................16第七节正交实验对粗选条件的确定.............................................................................................................17第四章浮选流程结构的研究分析························································································27第一节浮选流程探索试验.............................................................................................................................27第二节浮选速率试验............................................................................