CAJ | 학술논문

本文对某铜金精矿进行了高温加压氧化—氰化工艺试验研究,探讨了浸出时间、浸出温度、氧分压和初始NaCl浓度等工艺参数对铜浸出率的影响以及后续氰化条件对金银浸出率的影响.结果表明,在综合条件下,即粒度-325目占90%、初始NaCl浓度40 g/L、浸出温度180℃、氧分压0.6 MPa、液固比5∶1、浸出时间2.5 h以及搅拌速度750 rpm,在氰化条件:振荡氰化、液固比2∶1、NaCN加入量10 kg/t浸铜渣和氰化时间24 h,金、银、铜的浸出率分别为98.3%、94.7%和99.7%.该铜金精矿采用加压酸浸—氰化提取金银铜工艺具有对3种有价金属回收率高、氧化速度快、对矿石中杂质不敏感及对环境污染小等优点,具有较好的工业化前景.
본문대모동금정광진행료고온가압양화—청화공예시험연구,탐토료침출시간、침출온도、양분압화초시NaCl농도등공예삼수대동침출솔적영향이급후속청화조건대금은침출솔적영향.결과표명,재종합조건하,즉립도-325목점90%、초시NaCl농도40 g/L、침출온도180℃、양분압0.6 MPa、액고비5∶1、침출시간2.5 h이급교반속도750 rpm,재청화조건:진탕청화、액고비2∶1、NaCN가입량10 kg/t침동사화청화시간24 h,금、은、동적침출솔분별위98.3%、94.7%화99.7%.해동금정광채용가압산침—청화제취금은동공예구유대3충유개금속회수솔고、양화속도쾌、대광석중잡질불민감급대배경오염소등우점,구유교호적공업화전경.
Hot pressure oxidation-cyanidation process was used for selectively extracting valuable metallic eleme-nts from a copper bearing gold concentrate.Detailed experiments were performed to study the effects of hot pressure oxidation processing parameters,such as leaching time,leaching temperature,partial pressure of oxygen, concentr-ate of sodium chloride,on the leaching rate of copper during hot pressure oxidation process,as well as the leaching rates of gold and silver in the course of subsequent cyanidation process.The results showed that under the optimiz-ed conditions the leaching rates of gold,silver, and copper could reach 98.3%,94.7%,and 99.7%, respectively. These suggest that hot pressure oxidation-cyanidation process is a feasible technique with good prospect for industrialization for processing copper bearing gold concentrate.