低品位多金屬鉍礦的濕法浸出工藝及其基礎(chǔ)理論研究.pdf

1、Y97主3S7分類號UDC密級編號YIJNNANNORMALUNIVERSITY碩士研究生學(xué)位論文低品位多金屬鉍礦的濕法浸出工藝及其基礎(chǔ)理論研究學(xué)院絲堂絲王蘭醫(yī)專業(yè)名稱物堡絲堂研究方向丞也塹撻抖研究生姓名昱緝垡學(xué)號03070304008導(dǎo)師姓名蘭差蟲職稱熬撞2006年5月10日低品位多金屬鉍礦的濕法漫出及其基礎(chǔ)理論研究Thecurrentsituationofleachingofbismuthfromthelowgrademineral

2、wassummedupThelowgradecomplexmulti—metalbismuthoreusedinthisexperimentcontains725percentofbismuthand2553percentofsulfurThepurposeofthisexperimentwastOprobeanewhydrometallurgicalapproachtoextractbismuthfromthelowgradeandc

3、omplexmultimetalsulfideoresathighrecoveriesbutlowcosts，lowpoHutionbyMn02Basedontheanalysisofthermodynamicsandmechanismoftheleachingprocess，laboratorialsealeexperimentsaboutDewtechnologyhadbeeninvestedsystematicaUyinthisp

4、aperundernormalpressureandroomtemperatureTheoptimumconditionsWeobtainedasfollows：concentrationofhydrochloricacid=4。0mol／L，stirringspeed=800rpm，particlesize=01050074mm，concentrationofsodiumchloride=15mol／L，solid／liquidmil

5、e=l：5，leachingtime=180minUndertheoptimumconditions，thecomprehensiveleachingrateismorethan96％ThekineticsofleachingbismuthfromlowgradeandcomplexmultimetalsulfideoreswasalsoinvestigatedRcsuRsshowedthattheleachingprocessCall

6、besimulated謝thasbri：nkmgcoremodell一，7弦=kt髓eactiva曲nenergycalculatedaccordingt0theArrheniusequationWas56868kl／moLThereWaSalinearrelationbetweentheapparentmteconstantandthereciprocalofthemeanparticlediameterTheresultsofkin

7、eticanalysisoftheleachingdataundervariousexperimentalconfionsindicatedareactioncontrolledbythesolutiontransportofprotonsthroughtheproductlayer；thefollowingrateequationWaSestablished：№穢臘】=等r=等州淞】0”唧(≠筍)rThecementationofbi