低品位钼精矿的钼提取研究-JournalofNortheasternUniversity-东北.PDFVIP

第32 卷第8期 东 北 大 学 学 报 ( 自 然 科 学 版 ) Vol32, No. 8 2 0 1 1 年 8 月 Journal of Northea tern U niver ity( Natural Science) Aug. 2 0 1 1 1 1 1 2 俞 娟 , 杨洪英 , 陈燕杰 , 范有静 ( 1. , 110819; 2. , 110819) : , , 600 , 2 h, 80 , 14, 467 kg/ t, 4 ( HCl) ( N a CO + NaOH) : 3492% , , 2 3 ; ( Na CO + NaOH) 533 kg/ t, 433 kg/ t 2 3 968% : ; ; ; ; ; : T F 841. 2 : A : 2011) 08114 104 Extraction of Molybdenum from LowGrade Molybdenum Concentrates 1 1 1 2 YU Juan , YANG Hongying , CHEN YanJie , FAN Youj ing ( 1. School of M ater ial M etallurgy, Northea tern Univer it y, Shenyang 110819, China; 2. School of Science , Northea tern Univer ity , Shenyang 110819, China. Corr e ponding author : YA NG Hongying, profe or, Email: yanghy @ mm. neu. edu. cn) Abstract: U ing roa ting , ammonia leaching and alkaline leaching, the ex traction of molybdenum from lowgrade molybdenum concentrate w a tudied. The ex perimental re ult how ed that the addition of the odium carbonate increa e the leaching rate of molybdenum by accelerating the decompo ition of calcium molybdate. The optimum condition for the molybdenum extraction are a follow : the roa ting tem perature i 600 , the roa ting time 2 h, the am monia leaching temperature 80 , the exce coeff icient of aqueou ammonia 14, the do age of the odium carbonate 467 kg/ t and the ratio of liquid to olid 41. The leaching re idue w a treated by hydrochloric acid leaching ( H Cl) method an