TPO法测定磷矿中不同类型碳物种分布特性  

Determination of Distribution Characteristics of Different Carbon Species in Phosphorite by TPO Method

作　　者：唐石云[1,2] 杨长斌 彭禹 杨秀艳 郭俊江 谢渝春[1] 唐安江 Tang Shiyun;Yang Changbin;Peng Yu;Yang Xiuyan;Guo Junjiang;Xie Yuchun;Tang Anjiang(Guizhou Institute of Technology,Guiyang,Guizhou,China;Engineering Technology Research Center of Fluorine Silicon Material,Guiyang,Guizhou China)

机构地区：[1]贵州理工学院,贵州贵阳550003 [2]氟硅材料工程技术研究中心,贵州贵阳550003

出　　处：《矿产综合利用》2020年第2期106-113,共8页Multipurpose Utilization of Mineral Resources

基　　金：国家地区科学基金项目(21766005);贵州省科技计划项目(黔科合LH字[2016]7104);大学生创新创业训练项目(201714440098,2018520685);黔科合服企GY字[2015]4009;黔教合KY字[2016]014;高层次人才科研启动经费项目资助。

摘　　要：目前,对磷矿中不同类型碳物种分布特性的研究报道很少且往往采用分步法,本文以瓮安磷矿和织金磷矿为原料,采用TPO技术实现了一步法对不同磷矿中不同类型碳物种分布的快速准确测定,并通过EDS、XRD及TG-DSC对两种磷矿在TPO试验前后进行了表征分析。TPO结果表明,两种磷矿中均存在Tmax约为480 oC和540 oC两种有机碳物种,无机碳物种则为Tmax约在700-725℃的MgCO3和870-900℃的CaCO3;EDS结果显示磷矿中碳元素分布存在局部富集现象;XRD结果表明磷矿主成分Ca5(PO4)3F在1000 oC以下十分稳定,而磷矿中无机碳酸盐白云石[MgCa(CO3)2]在纯氧中经过990℃煅烧后分解完全;TG-DSC结果显示两种磷矿在程序升温过程中TG和DSC信号变化都不太显著,仅能定性部分碳物种变化趋势。可见,TPO法能很好地鉴别磷矿中包含的有机碳物种及无机碳物种,并通过峰面积对各碳物种进行定量分析。At present,there are few reports on the distribution characteristics of different carbon species in phosphorite,and the step-by-step method is often used.In this paper,using Weng'an and Zhijin phosphorite as raw materials,the TPO technology is used to achieve a one-step method for rapid and accurate determination of the distribution of different carbon species in different phosphorite,and the two kinds of phosphorite were characterized and analyzed by EDS,XRD and TG-DSC before and after TPO experiment.The TPO results showed that there are two kinds of organic carbon species with Tmax is about 480℃and 540℃ in the phosphorite,meanwhile inorganic carbon species are mainly MgCO3 and CaCO3 with Tmax about 700-725℃ and 870-900℃,respectively.The EDS results revealed that the C element is locally enriched in phosphorite.The XRD results showed that the main component of Ca5(PO4)3F in phosphorite was very stable below 1000℃,while the inorganic carbonate of dolomite[MgCa(CO3)2]was completely decomposed after calcination at 990℃ in pure oxygen.The TG-DSC results suggested that the TG and DSC signals for the two phosphate rocks did not change significantly during the temperature programmed process,and only partial carbon species could be distinguished.Thus,both organic and inorganic carbon species in the phosphate rocks could be well identified from the TPO curves,and the content of each carbon species was calculated by corresponding peak area.

关 键 词：铅锌矿 工艺矿物学 赋存状态 矿石 

分 类 号：TD989[矿业工程—选矿]