摘要
为深入探究贵州某赤泥中铝铁钛矿物组成、嵌布特征及元素赋存形式,明确适宜的回收方法,对其开展了工艺矿物学研究。分别采用化学多元素分析、激光粒度仪分析和SEM-EDS-BPMA矿物自动定量分析系统对赤泥的化学组成、粒度特性、元素分布和矿物嵌布特征进行了详细分析。研究结果表明,赤泥样品中富含铁、铝和钛等可具回收价值的金属成分;赤泥粒度极细,-25μm的产率高达77.60%。矿物组成复杂,主要矿物包括赤铁矿、铝硅酸铁、铁铝硅酸钙和钙铁氧化物。赤铁矿富连生体较多,嵌布粒度较粗;然而,硬水铝石和金红石等矿物含量较低,嵌布粒度细小,分布稀散,分离提取难度较大。本研究进一步明确了铝、铁、钛在赤泥中的赋存形式,为拜耳法赤泥制定高效利用方案提供了重要矿物学依据。
A process mineralogy study was carried out to investigate the mineral composition,embedding characteristics and elemental distribution of aluminum,iron and titanium in a red mud in Guizhou Province,and to identify suitable recovery methods.The chemical composition,particle size characteristics,elemental distribution and mineral embedding characteristics of the red mud were analyzed in detail by chemical multi-element analysis,laser particle sizer analysis and SEM-EDS-BPMA automatic quantitative mineral analysis system.The results showed that the red mud samples are rich in iron,aluminum and titanium,which can be recycled;Its particle size is very fine,and the yield of-25μm is as high as 77.60%.The mineral composition is complex,and the main minerals include hematite,iron aluminum silicate,calcium iron aluminum silicate,and calcium iron oxide.Hematite-rich concretions are more abundant and have a coarse embedded grain size;However,minerals such as stibnite and rutile are low in content,have a fine embedded grain size,are sparsely distributed,and are difficult to separate and extract.The present study further clarifies the forms of aluminum,iron and titanium elements in red mud,which provides an important mineralogical theoretical basis for the development of an efficient utilization scheme for Bayer process red mud.
作者
刘文宝
张覃
王永伦
沈岩柏
刘文刚
LIU Wenbao;ZHANG Qin;WANG Yonglun;SHEN Yanbai;LIU Wengang(Guizhou Academy of Sciences,Guiyang 550001,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2024年第9期118-124,共7页
Metal Mine
基金
贵州省省级科技计划项目(编号:黔科合支撑[2023]一般142)
中国博士后科学基金项目(编号:2022M720927)。
关键词
拜耳法赤泥
工艺矿物学
解离度
元素赋存状态
Bayer red mud
process mineralogy
dissociation degree
state of element′s assignment
