CAJ | 학술논문

针对某地铜铅锌复杂多金属精矿，研究了采用两段加压浸出法浸出锌、铜、铁。试验结果表明：以H2 SO4初始质量浓度105 g/L、Fe质量浓度约15 g/L、Zn质量浓度约55 g/L的溶液为浸出剂，在温度120℃、浸出时间2 h、液固体积质量比4 mL/g、总压力1．9 M Pa、搅拌转速600 r/min、添加剂加入量为矿石质量的0．3％条件下进行一次浸出，锌浸出率为72％左右，铜基本不被浸出，溶液中铁去除率为95％；对一次浸出渣，在硫酸初始质量浓度140 g/L、液固体积质量比4 mL/g、总压力1．9 M Pa、搅拌转速600 r/min、温度160℃、浸出时间3 h、添加剂加入量为一次浸出渣质量的0．3％的条件下进行二次浸出，锌、铜、铁浸出率分别为85．91％，77．76％和58．84％；二次浸出液配制浸出剂用于一次浸出。一次浸出液中，H2 SO4及Fe质量浓度较低，便于后续工序净化除杂、获得符合锌电积要求的净化液。
침대모지동연자복잡다금속정광，연구료채용량단가압침출법침출자、동、철。시험결과표명：이H2 SO4초시질량농도105 g/L、Fe질량농도약15 g/L、Zn질량농도약55 g/L적용액위침출제，재온도120℃、침출시간2 h、액고체적질량비4 mL/g、총압력1．9 M Pa、교반전속600 r/min、첨가제가입량위광석질량적0．3％조건하진행일차침출，자침출솔위72％좌우，동기본불피침출，용액중철거제솔위95％；대일차침출사，재류산초시질량농도140 g/L、액고체적질량비4 mL/g、총압력1．9 M Pa、교반전속600 r/min、온도160℃、침출시간3 h、첨가제가입량위일차침출사질량적0．3％적조건하진행이차침출，자、동、철침출솔분별위85．91％，77．76％화58．84％；이차침출액배제침출제용우일차침출。일차침출액중，H2 SO4급Fe질량농도교저，편우후속공서정화제잡、획득부합자전적요구적정화액。
T he experimental sample is a Cu-Pb-Zn complex polymetallic ore .Leaching of Zn ,Cu and Fe from the ore by a two-stages pressure leaching process was researched .Using the solution in which H2 SO4 initial concentration is 105 g/L ,Fe concentration is 15 g/L ,Zn concentration is 55 g/L as leaching agent ,the first-stage leaching was conducted under the conditions of leching temperature of 120 ℃ ,leaching time of 2 h ,the ratio between liquid and solid of 4 mL/g ,total pressure of 1 .9 MPa , stirring speed of 600 r/min ,additive usage of 0 .3% ,the leaching rate of Zn was about 72% ,while Cu wasn’t leached ,the removal rate of Fe was 95% .The second-stage leaching of the first-stage leaching residue was conducted under the conditions of H2SO4 initial concentration of 140 g/L ,the ratio between liquid and solid of 4 mL/g ,total pressure of 1 .9 MPa ,stirring speed of 600 r/min ,leaching temperature of 160 ℃ ,leaching time of 3 h ,additive usage of 0 .3% ,leaching rate of Zn ,Cu and Fe were 85 .91% ,77 .76% and 58 .84% ,respectively .The second-stage leaching solution was used to prepare the leaching agent for the first-stage leaching .The first-stage leaching solution with lower concentation of H2 SO4 and Fe is easy to be purified in subsequent ,the purified solution meets with the requirement of zinc electrodepositing .