褐铁型红土镍矿活化预处理后选择性浸出镍钴  

Selective Leaching of Nickel and Cobalt from Limonitic Laterite after Activation Pretreatment

作　　者：杨玮娇[1,2] 马保中[2] 蒋兴明 王华[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]北京矿冶研究总院,北京100160

出　　处：《有色金属（冶炼部分）》2018年第1期16-19,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51304023)

摘　　要：以褐铁型红土镍矿为原料,研究了其活化预处理后镍、钴和铁的选择性浸出。考察了温度、时间、液固比、搅拌转速及氟化钠加入量对金属浸出效果的影响,得出最佳工艺条件为:温度85℃、浸出时间3h、液固比5∶1(mL/g)、搅拌速度400r/min及NaF添加量4%,镍、钴浸出率高达85.62%和94.26%,铁以黄钠铁矾的形式进入渣相,浸出率低至2.43%。活化预处理可以实现褐铁型红土镍矿中镍、钴和铁的选择性浸出。Selective leaching of nickel and cobalt from limonitic laterite ores after activation pretreatment was studied.The effects of temperature,duration,L/S,stirring speed and sodium fluoride addition on metals extraction were investigated.Ni and Co extraction rate is 85.62% and 94.26% respectively under the optimum conditions including temperature of 85℃,duration of 3 h,L/S=5∶1（mL/g）,stirring speed of 400 r/min,and NaF dosage of 4%.Iron comes into residue in form of sodium jarosite with leaching rate of only 2.43%.Selective leaching of nickel,cobalt and iron can be efficiently achieved by activation pretreatment of limonitic laterite ores.

关 键 词：褐铁型红土镍矿 水浸 镍 钴 

分 类 号：TF19[冶金工程—冶金物理化学]