复杂铂钯精矿制得高冰镍的湿法精炼  

Hydrometallurgical Refining of High-grade Nickel Matte from Complex Platinum-Palladium Concentrates

作　　者：高起方 谢铿 王海北 邹发夔 邓彤 高亮[1] 刘三平 赵旭 杨必文 李达 GAO Qifang;XIE Keng;WANG Haibei;ZOU Fakui;DENG Tong;GAO Liang;LIU Sanping;ZHAO Xu;YANG Biwen;LI Da(Yunnan Gold Mining Group Co.,Ltd.,Kunming 650200,China;BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]云南黄金矿业集团股份有限公司,昆明650200 [2]矿冶科技集团有限公司,北京100160

出　　处：《有色金属（冶炼部分）》2024年第10期172-180,共9页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2019YFC1907403)。

摘　　要：以金宝山铂钯精矿熔炼—吹炼得到的高冰镍为研究对象,采用一段常压浸出—两段加压浸出湿法冶金工艺处理,研究镍、钴、铜、铁、硫的浸出行为及贵金属的精炼富集,考察了浸出终点pH、浸出温度、液固比、氧分压、反应时间、初始酸度等因素的影响。结果表明:常压浸出控制条件为浸出温度70℃、浸出时间8 h、液固比6;一段加压浸出控制条件为溶液用量500 mL(H_(2)SO_(4)10 g/L,Cu 3.19 g/L)、液固比10、氧分压0.2 MPa、浸出时间1 h、反应温度150℃;二段加压浸出控制条件为溶液用量500 mL(H_(2)SO_(4)40 g/L)、液固比10、反应温度180℃、氧分压0.1 MPa,反应时间2 h。浸出后,高冰镍中的镍和铜的浸出率可以达到99%以上,铂、钯基本不被浸出,金、银、铂、钯总量的富集程度可以达到88倍以上。Taking the high-grade nickel matte obtained from the smelting and converting of Jinbaoshan platinum-palladium concentrates as the research object,a hydrometallurgical process of one-stage atmospheric pressure leaching followed by two-stage pressure leaching was used to study the leaching behavior of nickel,cobalt,copper,iron and sulfur,as well as the refining and enrichment of precious metals.The effects of leaching endpoint pH value,leaching temperature,liquid-solid ratio,oxygen partial pressure,reaction time,initial acidity and other factors were investigated.The results show that the control conditions for atmospheric pressure leaching are leaching temperature of 70℃,leaching time of eight hours,liquid-solid ratio of 6,and the control conditions for the first stage pressure leaching are solution dosage of 500 mL(H_(2)SO_(4)10 g L,Cu 3.19 g L),liquid-solid ratio of 10,oxygen partial pressure of 0.2 MPa,leaching time of one hour,and reaction temperature of 150℃.The control conditions for the second stage pressure leaching are solution dosage of 500 mL(H_(2)SO_(4)40 g L),liquid-solid ratio of 10,reaction temperature of 180℃,oxygen partial pressure of 0.1 MPa,and reaction time of two hours.The leaching rate of nickel and copper in high-grade nickel matte can reach more than 99%,and platinum and palladium are basically not leached,and the enrichment degree of total content of Au,Ag,Pt and Pd is more than 88 times.

关 键 词：铂 常压浸出 加压浸出 选择性分离 贵金属富集 

分 类 号：TF815[冶金工程—有色金属冶金] TF803