中南大学学报（自然科学版）2017，Vol.48Issue(3)：553-561,9.DOI:10.11817/j.issn.1672-7207.2017.03.001
机械活化强化高磷粗铁精矿酸浸脱磷的工艺及机理
Technology and mechanism of mechanical activation enhancing acid leaching dephosphorization of high phosphorus rough iron ore concentrate
摘要
Abstract
High pressure grinding roller (HPGR) was used to mechanically activate high phosphorus rough iron ore concentrate which was obtained by magnetization roasting-magnetic separation of oolitic high phosphorus iron ore, and sulfuric acid leaching was used to remove phosphorus of high concentrate phosphorus rough iron ore with different activation degrees. The influence and mechanism of mechanical activation on sulfuric acid leaching dephosphorization of high concentrate phosphorus rough iron ore were studied. The results show that the iron grade of high phosphorus rough iron ore concentrate is 54.92%, and phosphorus mass fraction is 0.76%. The phosphorus mass fraction reduces to 0.33% after direct acid leaching, iron grade is 55.74%, dephosphorization rate is 63.79%, and iron recovery rate is 84.64%. However, with mechanical activation treatment of HPGR, the phosphorus content reduces to 0.10% after acid leaching, iron grade is 58.02%, dephosphorization rate is 88.99%, and iron recovery rate is 88.42%. The reasons are that mechanical activation makes high phosphorus rough iron ores refined and scattered, cracks and selective dissociation are produced within particles, the diffusion resistance of reactant drops, which makes it easy to spread to the particle surface and its internal reaction and promote dephosphorization. In addition, the particle morphology and crystal structure are destroyed, and the particles are in metastable state, which further promotes the dephosphorization.关键词
高磷粗铁精矿/机械活化/选择性解离/颗粒形貌/硫酸浸出/晶体结构Key words
high concentrate phosphorus rough iron ore/mechanical activation/selective dissociation/particle morphology/sulfuric acid leaching/crystal structure分类
矿业与冶金引用本文复制引用
朱德庆,王浩,潘建,李晓波..机械活化强化高磷粗铁精矿酸浸脱磷的工艺及机理[J].中南大学学报（自然科学版）,2017,48(3):553-561,9.基金项目
国家科技部火炬计划项目(2011GH561685) (Project(2011GH561685) supported by the National Torch Program of Department of Science and Technology) （2011GH561685）
