中南大学学报（自然科学版）2011，Vol.42Issue(4)：853-858,6.
热处理对黑色岩系镍钼矿富集的影响
Influence of heat treatment on enrichment of Ni-Mo black shale ore
摘要
Abstract
In order to provide theoretical foundation for the combination of separation-metallurgy of Ni-Mo ores.X-ray diffraction (XRD) analysis was measured for Ni-Mo crude ores roasted in 800 ℃ atmosphere for 1.5 h, differential thermal (DTA) and thermo gravimetric (TG) analysis of the Ni-Mo ores in air and argon were conducted.Simultaneously,flotation test were conducted for Ni-Mo crude ores and roasted ores.The results show that the organic matter in Ni-Mo ores burns rapidly in the air atmosphere at 300-800 ℃ and DTA curves show a big exothermic peak which indicates that the mass loss rate of the ores is 20％; reactions of volatilization, vulcanization and combination occur in the argon atmosphere, and a small exothermic peak which indicates a mass loss rate of 18％ is observed.Decomposition reaction occurs all the time in the air atmosphere at above 800 ℃; while in the argon atmosphere, decomposition reaction stops and combination reaction begins when the temperature is higher than 1 320 ℃.The roasted Ni-Mo ores can be easily floated, with the molybdenum concentrate grade increasing by 0.88％ and the recovery by 7.91％, respectively.关键词
镍钼矿/差热与热重分析/焙烧/浮选Key words
Ni-Mo ores/ differential thermal and thermo gravimetric analyses/ roasting/ flotation分类
矿业与冶金引用本文复制引用
孙伟,刘建东,胡岳华,耿志强..热处理对黑色岩系镍钼矿富集的影响[J].中南大学学报（自然科学版）,2011,42(4):853-858,6.基金项目
国家高技术研究发展计划("863"计划)项目(2007AA06Z129) （"863"计划）
