摘要
研究了氧化挥发-离子交换法从低品位钼精矿中提取铼的工艺。通过两段高温氧化焙烧将铼氧化为Re_(2)O_(7),挥发进入烟气,实现钼和铼的有效分离,焙烧温度675℃时铼挥发率达到了85.42%。对含铼烟气进行淋洗,获得含铼溶液,再利用D201×7离子交换树脂实现溶液中铼的选择性分离提取,在溶液pH值为9、液固比50 mL/g、吸附温度35℃、吸附时间20 min时,铼吸附率达97.52%,钼吸附率低于20%。最后采用分步解吸浓缩结晶法制备了铼酸铵产品,铼总回收率达70.68%。
Extraction of rhenium from low-grade molybdenum concentrate by adopting a process of oxidative volatilization followed by ion exchange was explored in experiments.Firstly,a two-stage high-temperature oxidative roasting was adopted to oxidize rhenium into Re_(2)O_(7).Rhenium and molybdenum were effectively separated due to rhenium volatilizing into the flue gas.The volatilization rate of rhenium reached 85.42% after roasting process at 675℃.Then,the rhenium-containing flue gas was eluted to get rhenium-containing solution,in which rhenium was selectively extracted with D201×7 ion exchange resin.With the solution pH of 9,liquid/solid ratio of 50 mL/g,a 20 min adsorption at temperature of 35℃ brought the adsorption rate of Re up to 97.52% and the adsorption rate of Mo less than 20%.Finally,a product of ammonium rhenate was prepared by stepwise desorption followed by concentration and crystallization.By this process,the total recovery of Re can reach 70.68%.
作者
汪国靖
甘敏
范晓慧
陈许玲
黄康
王海波
WANG Guojing;GAN Min;FAN Xiaohui;CHEN Xuling;HUANG Kang;WANG Haibo(Hubei Three Gorges Laboratory,Yichang 443007,Hubei,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China)
出处
《矿冶工程》
北大核心
2025年第5期148-153,共6页
Mining and Metallurgical Engineering
基金
国家重点研发计划(2023YFC3207404)
湖南省战略金属矿产资源清洁高效利用协同创新中心资助
区域开发与环境响应湖北省重点实验室基金项目(2022(C)001)。
关键词
钼精矿
铼
氧化焙烧
淋洗
离子交换
离子交换树脂
烟气
氧化挥发
解吸
molybdenum concentrate
rhenium
oxidative roasting
elution
ion exchange
ion exchange resin
flue gas
oxidative volatilization
desorption
