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1、第34卷第6期礦冶工程Vo1.34№62014年12月blININGANDMETALLURGICALENGINEERINGDecember2O14某銻金礦綜合回收銻、金的試驗(yàn)研究①楊永斌,劉波,李騫,姜濤(中南大學(xué)資源加工與生物工程學(xué)院,湖南長(zhǎng)沙410083)摘要:采用酸法浸銻.浸銻渣焙燒脫硫-氰化浸金工藝從某銻金精礦中分離提取銻、金。酸法浸銻最佳工藝條件為:溫度為95℃、[H]=4mol/L、液固比為4:1、FeC1,過(guò)量系數(shù)為1.1、浸出時(shí)間為0.5h,在此條件下,銻浸出率為99.05%,進(jìn)入浸銻液的金僅為0.99%,實(shí)現(xiàn)了銻、金良好的選擇性浸出。
2、對(duì)浸銻渣直接氰化浸金,浸金率僅為71.93%。為了提高浸金率,在分析酸性浸銻渣的礦物組成的基礎(chǔ)上,對(duì)浸銻渣進(jìn)行氧化焙燒,結(jié)果表明:碚砂中硫品位僅為O.18%,硫脫除率達(dá)到了99.81%,渣中的單質(zhì)硫及硫化物顯著減少,主要以赤鐵礦和脈石礦物為主。最終金浸出率達(dá)到95.92%,比浸銻渣直接氰化浸金提高了約24個(gè)百分點(diǎn)。關(guān)鍵詞:浸銻渣;氧化焙燒;脫硫;氰化浸出中圖分類(lèi)號(hào):TF111文獻(xiàn)標(biāo)識(shí)碼:Adoi:10.3969/j.issn.0253—6099.2014.06.024文章編號(hào):0253—6099(2014)06-0097-04Comprehensive
3、RecoveryofAuandSbfromanAntimony-goldConcentrateYANGYong—bin,LIUBo,LIQian,JIANGTao(SchoolofMineralProcessingandBioengineering,CentralSouthUniversity,Changsha410083,Hunan,China)Abstract:ComprehensiverecoveryofSbandAufromanantimony—goldconcentrateisstudiedbyadoptingaprocessofSbleac
4、hingwithacidsolution—oxidizingroastingoftheantimonyresidue—cyanideleachingofgold.Underthefollowingoptimumconditions,thatis,leachingat95℃for0.5hwithHCIconcentrationat4.0mol/L,liquid—solidrateat4:1,excesscoeficientofFeC13being1.1,afavorableselectiveleachingefectcanberealizedforSba
5、ndAu,withtheleachingrateofSbupto99.05%andonly0.99%Aurecoveredintoantimonyleachate.However.thefollowingdirectcyanideleachingonlyresultedintheAuleachingrateof71.93%.ForthepurposeofincreasingtheleachingrateofAu,theantimonyleachingresiduewassubjectedtooxidizingroastingprocessbasedon
6、theanalysisofitsmineralcompositions,leadingtoonly0.18%Sinthecalcinedproduct,withremovalrateofsulfurupto99.81%.Itisfoundthathematiteandganguemineralsarethedominantmineralsintheresidue,withthecontentofsulfurandsulfideremarkablydecreased.TheultimateleachingrateofAureached95.92%,24p
7、ercentagepointshigherthanthatbydirectcyanideleachingprocess.Keywords:antimonyleachingresidue;oxidizingroasting;desulfurization;cyanideleaching濕法煉銻工藝具有適應(yīng)性強(qiáng)、產(chǎn)品靈活、環(huán)境污染煉銻具有銻浸出率高,處理銻金礦時(shí)金、銻具有良好的小等優(yōu)點(diǎn),主要包括酸性濕法煉銻和堿性濕法煉銻2選擇性分離特性。目前,國(guó)內(nèi)應(yīng)用最多的是氯化浸出種工藝。堿法煉銻作為一種成熟的煉銻方法,常被用脫銻一銻渣脫硫(砷)一氯化提金工藝J,脫硫方
8、法主要來(lái)處理銻金礦。堿法煉銻Nas增生嚴(yán)重,浸出過(guò)有焙燒法、煤油浸硫、加熱蒸餾等J,這些方法中