摘要
采用化学分析、X射线衍射、光学显微镜和BPMA等多种手段,从工艺矿物学角度研究山东某拜耳法赤泥的物质组成、粒度组成等,重点分析了及赤泥中铁和铝的赋存状态。研究结果表明:赤泥的粒度微细,其矿物组成与化学成分均复杂;赤泥中所含的主要铁矿物为赤铁矿和针铁矿,主要铝矿物为一水软铝石和三水铝石;主要含铁和铝的物质有铁铝氧化物和微粒泥状硅酸盐混合物(钠硅渣),且2种物质中铁、铝含量变化较大,赤泥中铁铝氧化物质量分数为18.28%;铁铝氧化物各元素含量不均一,其中铝平均质量分数为12.78%,铁平均质量分数为45.81%。赤泥中的赤铁矿和褐铁矿中均存在铁铝类质同象;含铝赤铁矿、铝针铁矿和铁铝氧化物的存在以及赤泥粒度微细粒钠硅渣容易聚团包裹铁、铝矿物等导致赤泥中的铁铝大部分难以分离。
A study on a Bayer red mud from Shandong province from the perspective of process mineralogy was conducted through chemical analysis,XRD,optical microscope and BPMA automatic analyser.The material composition and particle size composition of red mud were studied in detail,and the occurrence state of iron and aluminum in red mud was emphatically analyzed.The results show that the particle size of red mud is fine,and its mineral composition and chemical composition are complex.The main iron minerals contained in red mud are hematite and goethite,and the main aluminum minerals are boehmite and gibbsite.The main substances containing iron and aluminum are iron-aluminum oxide and particulate muddy silicate mixture(sodium-silicate slag),and the content of iron and aluminum in the two substances varies greatly.The mass fraction of ironaluminum oxide in red mud is 18.28%.The content of each element in iron-aluminum oxide is uneven,in which the average mass fraction of aluminum is 12.78%,and the average mass fraction of iron is 45.81%.There are ironaluminum isomorphisms existing in hematite and limonite in red mud.Due to the existence of the isomorphism of iron and aluminum in hematite and goethite,and the existence of a considerable amount of iron-aluminum oxides,as well as the complex embedding characteristics of iron minerals,aluminum minerals and sodium-silicate slag,most of iron and aluminum in red mud are difficult to separate.
作者
柳晓
韩跃新
何发钰
高鹏
袁帅
LIU Xiao;HAN Yuexin;HE Fayu;GAO Peng;YUAN Shuai(College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;State Key Laboratory of Mineral Processing,Beijing 100070,China;China Minmetals Corporation,Beijing 100010,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第12期4620-4630,共11页
Journal of Central South University:Science and Technology
基金
国家重点研发计划项目(2023YFC2909000)
矿物加工科学与技术国家重点实验室开放基金资助项目(BGRIMM-KJSKL-2023-22)
山东科技大学菁英计划(skr21-3-C-108)。
关键词
拜耳法赤泥
工艺矿物学
铁铝赋存
类质同象
铁铝氧化物
Bayer red mud
process mineralogy
occurrence of iron and aluminum
isomorphism
iron-aluminum oxide
