赞比亚某硫化镍精矿氧压酸浸研究  

Oxidative Pressure Leaching of Nickel Sulfide Concentrate from Zambia

作　　者：谢铿 刘三平 王海北 XIE Keng;LIU San-ping;WANG Hai-bei(BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]北京矿冶科技集团有限公司

出　　处：《有色金属（冶炼部分）》2019年第10期6-10,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51434001);国家重点基础研究发展计划项目(2014CB643405)

摘　　要：以赞比亚某铜镍矿浮选得到的硫化镍精矿为研究对象,采用加压湿法冶金工艺处理,研究镍、铜、铁的浸出行为,考察了浸出温度、硫酸用量、氧分压、液固比、反应时间等因素的影响。在200℃、硫酸用量每吨精矿100 kg、氧分压0.5 MPa、液固比4∶1、反应时间3 h的优化条件下进行浸出,镍和铜的浸出率均大于99.5%。高温和高氧分压条件利于镍的浸出,镍浸出速度更快。维持上述条件不变,将氧分压增大到0.8 MPa时,仅需浸出1.5 h,镍的浸出率就可达到99%左右。Nickel sulfide concentrate produced from copper-nickel ore in Zambia by flotation was treated by pressure hydrometallurgy.Leaching behaviors of nickel,copper and iron were studied.Effects of leaching temperature,sulfuric acid dosage,oxygen partial pressure,L/S and reaction time were investigated.Leaching rate of nickel and copper are both 99.5%above under the optimum conditions including temperature of 200℃,sulfuric acid dosage of 100 kg/t,oxygen partial pressure of 0.5 MPa,L/S=4/1,and reaction time of 3 h.Nickel extraction rises with increase of leaching temperature and oxygen partial pressure.It is feasible to leach nickel in a relatively shorter time under higher temperature and oxygen partial pressure.Leaching rate of nickel is about 99%after only 1.5 h with oxygen partial pressure rising to 0.8 MPa.

关 键 词：硫化镍精矿 镍 铜 铁 氧压酸浸 

分 类 号：TF815[冶金工程—有色金属冶金]