【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Re₂O₇,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%。更多还原

【Abstract】 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 Re₂O₇. 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%.更多还原