酸浸法从低品位氧化锌矿及含锌废石制备碱式碳酸锌  

Preparation of basic zinc carbonate from low-grade zinc oxide ore and zinc-bearing waste rock by acid leaching

作　　者：沈卫卫 沈贤德 林海彬 谢洪珍 SHEN Weiwei;SHEN Xiande;LIN Haibin;XIE Hongzhen(Xinjiang Zijin Zinc Industry Co.,Ltd.,Wuqia 845450,China;Xiamen Zijin Mining and Metallurgical Technology Co.,Ltd.,Xiaman 361000,China)

机构地区：[1]新疆紫金锌业有限公司,新疆乌恰845450 [2]厦门紫金矿冶技术有限公司,福建厦门361000

出　　处：《中国矿业》2022年第S01期444-450,共7页China Mining Magazine

摘　　要：采用酸浸法从新疆紫金低品位氧化锌矿及含锌废石制备碱式碳酸锌。在磨矿细度为-74μm占30%,液固比2,硫酸用量52 kg/t矿,浸出时间2 h,终点pH值1.5~2.0,锌浸出率为63%,氧化锌浸出率97%;浸出液采用碳酸钙预中和-碳酸钠沉锌工艺回收锌,在预中和终点pH值4.5~5.0,碳酸钠沉锌终点pH值8.0左右,最终获得锌沉淀率为99%,锌品位约50%的碱式碳酸锌产品,该产品可作为生产电锌的原料。Sulfuric acid leaching process for Xinjiang Zijin low grade zinc oxidized ore and waste rock contained zinc is studied to prepare basic zinc carbonate.About 63%of zinc is extracted under the following conditions grinding size at 30%passing-74μm,liquid to solid ratio at 2,sulfuric acid dosage with 52 kg per ton ore,final pH of 1.5-2.0 and leaching time for 2 h.As high as 99%of zinc in leaching solution is recovered by the process of pre-neutralization using limestone and precipitation reaction using sodium carbonate with the conditions of pre-neutralization at pH 4.5-5.0 and precipitation reaction at pH around 8.0.The zinc grade of basic zinc carbonate could reach 50%,which could be used as raw material for electrolytic zinc production.

关 键 词：酸浸法 低品位氧化锌矿 含锌废石 碱式碳酸锌 

分 类 号：TF813[冶金工程—有色金属冶金]