有色金属(冶炼部分)

以过氧化氢为氧化剂,采用氧化酸浸工艺使镍钴高温合金废料中的镍、钴、铼等进入溶液,钨、铪等富集在浸出渣中。结果表明,在下述最佳条件下,镍、钴、铼的浸出率均可达到99%以上:合金粉100g,粒度0.075⁰.100mm,盐酸浓度6mol/L,液固比6∶1,30%过氧化氢用量200mL,反应温度85℃,反应时间3h。

Ni,Co,Re and other metals were leached from superalloy scrap by oxidizing leaching with H2O2 as oxidant,and W,Hf were enriched in slag.The results show that the leaching rate of Ni,Co and Re is all 99%above under the optimum conditions including alloy powder of 100g,particle size of 0.075⁰.100 mm,hydrochloric acid concentration of 6mol/L,ratio of liquid to solid of 6∶1,dosage of H2O2(30% mass concentration)of 200mL,temperature of 85℃,and leaching duration of 3h.