中文摘要：

采用生物质还原氧化锰矿得到一氧化锰替代碳酸锰作为电解锰原料,通过调整电解锰的生产工艺,将浸出液的Ni,Co完全沉淀,使其得到有效富集。首先研究了硫酸量、浸出温度和浸出时间等酸浸条件对还原得到的一氧化锰中Ni,Co浸出率的影响。然后以二氧化锰为氧化剂,研究了中和剂的种类和酸碱度对沉铁的影响。并且确定了沉淀剂福美钠的使用量和沉淀pH对富集Ni,Co的影响。研究表明,最佳浸出条件是液固比为5.5∶1,浸出温度为90℃,浸出时间为30 min,镍钴的浸出率分别为94.45%,98.56%。以（NH4）2CO3代替氨水作为中和剂,可以减少铁渣吸附镍钴离子,增加镍钴回收率。沉淀最佳pH为4.2～5.0,镍钴的损失率为10%以下。沉淀最佳条件为SDD与钴镍最佳摩尔比为4∶1,pH为5.0。改进后的镍钴的总回收率分别为80%和83%,富集物中镍和钴的品味为12.13%,3.23%。

英文摘要：

Instead of manganese carbonate,MnO materials produced by reducing manganese oxide ore by biomass were used as raw material of EMM.From the acid-leaching solution of the MnO materials,Ni,Co were precipitated and enriched by adjusting EMM production process.Firstly,the effects of the amount of sulfuric acid,leaching temperature,leaching time on Ni and Co leaching rate were studied.Then using MnO2 as oxidant,the deferrization conditions（kinds of precipitant and acidity） were also examined.The factors of precipitant conditions（dosages of precipitant and acidity） were finally investigated.The results showed that 94.45%,98.56% of the Ni,Co leaching rate respectively could be achieved under the optimal conditions of liquid-solid ratio of 5.5∶ 1,leaching temperature of 90 ℃ for 30 min;the loss of Ni,Co could be lower than 10% when using（NH4）2CO3 to replace ammonia as alkali and keeping pH=4.2～5.0 which could effectively reduce the iron slag′s adsorption of Ni,Co;the optimal precipitation condition was the mole ratio of SDD to Ni,Co at 4∶ 1,pH at 5.It indicated that recovery of Ni,Co could exceed 80% and 83% and the content of Ni and Co reached 3.23% and 12.13% in suitable condition.