摘要
Abstract
Recovery of Mo ,Co and Ni from spent catalyst by air oxidation-NaOH leaching-HNO3 acidification process was studied .Experimental results show that the leaching of Mo is 99 .8% under the conditions of air flow of 30 L/min ,NaOH usage of doubled the theoretical Mo consumption ,leaching temperature of 70 ℃ .The iron is removed from the residue by HNO 3 acidification and H2 O2 oxidation at the conditions of 70 ℃ and H2 O2 usage of 2-3 times iron consumption .When filtrate pH is controlled at 9 .5 ,Ni and Co are precipitated in the forms of hydroxides ,and then are separated by acid dissolving and solvent extraction using P 507 .The method can avoid MoO3 evaporation ,and has low production cost and high metal recovery .关键词
废催化剂/钼/空气氧化/氢氧化钠/浸出/有价金属/回收Key words
spent catalyst/molybdenum/air oxidation/sodium hydroxide/leaching/valuable metal/recovery分类
矿业与冶金
