镍基含铼废合金氧化酸浸工艺  

Oxidizing Acid Leaching of Nickel-based Waste Superalloys Containing Rhenium

作　　者：邬建辉[1] 苏涛[1] 刘刚 张文宏[1] 魏涛[1] 罗妹妹 

机构地区：[1]中南大学冶金与环境学院,湖南长沙410083

出　　处：《过程工程学报》2015年第3期406-411,共6页The Chinese Journal of Process Engineering

摘　　要：在硫酸体系中，采用熔融雾化制粉、硫酸体系双氧水氧化酸浸工艺浸出铼，钨钽等稀有金属富集在渣中，研究了酸度、双氧水用量、温度、粒度、液固体积／质量比、时间对浸出的影响．结果表明，最佳浸出条件为：在硫酸体系中，废合金雾化粉20g，粉末粒度71～100μm，温度75℃，液固比8mL／g，硫酸浓度3．5mol／L，滴加30％双氧水65mL，反应6h．该条件下铼、镍和钴的浸出率均超过99％，钨钽浸出率均低于1％，钼浸出率为28％，实现了铼浸出与稀有金属在渣中富集．The melting atomization for powder preparation and oxidizing acid leaching of nickel-based waste superalloys containing rhenium with addition of hydrogen peroxide in sulfuric acid system were adopted for leaching of rhenium, molybdenum, tungsten, tantalum and other rare metals, nickel and cobalt were leached from waste superalloys, and tungsten, tantalum and other rare metals enriched in the leaching residue. The effects of sulfuric acid concentration, volume of hydrogen peroxide, temperature, particle size, ratio of liquid to solid and leaching time on the leaching rates of metals were examined. The optimized leaching conditions were obtained as the alloy powder 20 g, particle size 71-100/am, temperature 75 ~C, ratio of liquid to solid 8 mL/g, sulfuric acid concentration 3.5 mol/L, volume of 30%（co） hydrogen peroxide 65 mL, which was dropwise added, and reaction for 6 h in sulfuric acid system. Under the above conditions, the leaching rates of nickel, cobalt and rhenium were all over 99%, those of tungsten and tantalum less than 1%, and that of molybdenum is 28%. So. Re was completely leached into solution, and rare metals were enriched in residue.

关 键 词：含铼合金 氧化酸浸 硫酸 双氧水 回收 富集 

分 类 号：TF841.8[冶金工程—有色金属冶金]