中南大学学报（自然科学版）2013，Vol.44Issue(7)：2669-2674,6.
硅酸镍在氨-硫酸铵-水溶液中的溶解机理
Dissolution behavior of nickel silicate in ammonia-ammonium sulfate aqueous solution
摘要
Abstract
The dissolution equilibrium of NiSiO3 with various structures in ammonia system was studied.The dissolution mechanism of nickel oxide ore in ammonia system was examined in terms of crystal structure.The influence of mineral structure of nickel oxide on the leaching of nickel was researched.The results show that with the increase of the temperature,the crystallinity and the grain size of NiSiO3 increase gradually.While the strain decreases,the crystal structure will be more completed,that is,the crystal has higher stability.When the total ammonia concentration is 3.5 mol/L,n(NH3)/n(NH4+) is 2∶3,temperature is 25 ℃,the mass concentrations of NiSiO3 with crystallinity of 0％ and 100％ are 7.000 g/L and 0.029 g/L,respectively.So NiSO3 with ideal structure is difficult to dissolve.关键词
硅酸镍/结晶度/晶粒尺寸/微观应变/溶解度Key words
nickel silicate/ crystallinity/ crystallite size/ strain/ solubility分类
矿业与冶金引用本文复制引用
刘智勇,李启厚,刘志宏,杨天足,姜波,李玉虎..硅酸镍在氨-硫酸铵-水溶液中的溶解机理[J].中南大学学报（自然科学版）,2013,44(7):2669-2674,6.基金项目
国家重点基础研究发展计划("973"计划)项目(2007CB613604) （"973"计划）
教育部新世纪优秀人才资助计划(NCET-11-0517) （NCET-11-0517）
