我国典型拜耳法高铁赤泥的工艺矿物学研究  

Study on Process Mineralogy of Typical High-Iron Red Mud Derived from Bayer Process in China

作　　者：王相愚 王洪阳 赵宇琪 周慧丽 张震[3] 

机构地区：[1]安徽理工大学材料科学与工程学院,安徽 淮南 [2]安徽理工大学安徽省煤基固废新材料产业共性技术研究中心,安徽 淮南 [3]中冶长天国际工程有限责任公司,湖南 长沙

出　　处：《冶金工程》2024年第4期197-209,共13页Metallurgical Engineering

基　　金：本研究工作得到了矿物加工科学与技术国家重点实验室开放基金(BGRIMM-KJSKL-2024-08)、安徽理工大学高层次人才引进项目(2022yjrc25)、中国五矿科创基金(JHCX2024003)和安徽理工大学研究生创新基金(2024cx084)的支持,在此表示感谢。

摘　　要：采用化学分析、X射线衍射(XRD)、矿物特征自动定量分析系统(AMICS)、扫描电镜(SEM)、X射线能谱仪(EDS)等分析手段,对我国典型拜耳法高铁赤泥的化学组成、矿物组成、矿物嵌布及矿物解离度进行分析。结果表明:低温拜耳法高铁赤泥中Fe2O3和Al2O3质量分数分别为58.25%和18.87%;主要物相为铝针铁矿和赤铁矿,其质量分数分别为65.40%和13.05%;赤铁矿的平均粒径为15.54 μm,其解离度 ≥ 80%的质量百分数为10.61%。高温拜耳法高铁赤泥中Fe2O3和Al2O3质量分数分别为37.05%和21.36%;主要物相为赤铁矿、钙铁石榴石和钙霞石,其质量分数分别为36.48%、22.83%和13.88%;赤铁矿的平均粒径为18.66 μm,其解离度 ≥ 80%的质量百分数为30.57%。该研究为拜耳法高铁赤泥中有价组分提取新技术的开发提供指导。The chemical composition, mineral composition, mineral distribution, and mineral dissociation degree of typical high-iron red mud derived from Bayer process in China were systematically studies with the analysis methods of chemical analysis, X-ray diffraction, advanced mineral identification and characterisation system, scanning electron microscope, and energy dispersive spectrometer. The results show that the main minerals in low-temperature red mud, in which there are 58.25% of Fe2O3 and 18.87% of Al2O3, are alumogeothite and hematite with mass ratio of 65.40% and 13.05%, respectively. The mean particle size of hematite is 15.54 μm, and about 10.61% of hematite exists with dissociation degree of ≥80%. The content of Fe2O3 and Al2O3 in high-temperature red mud are 37.05% and 21.36%. The main minerals are hematite, andradite and cancrinite, with mass ratio of 36.48%, 22.83% and 13.88%, respectively. The mean particle size of hematite is 18.66 μm, and about 30.57% of hematite exists with dissociation degree of ≥80%. The results may provide a reference for developing a new technology for extracting valuable components from high-iron red mud derived

关 键 词：拜耳法 高铁赤泥 工艺矿物学 赤铁矿 铝针铁矿 

分 类 号：P57[天文地球—矿物学]