磷石膏主要化学成分及重金属元素分析  

Analysis of the Main Chemical Components and Heavy Metal Elements of Phosphogypsum

作　　者：王先桥 龚浩擂 龚姝 黄华 王露 范开静 WANG Xianqiao;GONG Haolei;GONG Shu;HUANG Hua;WANG Lu;FAN kaijing(National Center for Supervision and Inspection of Phosphorus Product Quality(Hubei),Yichang 443000,China)

机构地区：[1]国家磷产品质量监督检验中心(湖北),湖北宜昌443000

出　　处：《云南化工》2025年第4期51-54,共4页Yunnan Chemical Technology

摘　　要：分析磷石膏的化学成分,包括主要化合物及杂质元素的含量,为磷石膏综合利用及风险评价提供理论指导。以磷石膏及改性磷石膏为研究对象,利用X射线粉末衍射法(XRD)、X射线荧光光谱法(XRF)、电感耦合等离子体发射光谱法(ICP-OES)等确定其化学成分及含量。结果表明,磷石膏主要矿物由二水硫酸钙、半水及无水硫酸钙的混合相组成,主要杂质为硅酸钙及硅、铝、磷、氟等的混合盐;磷石膏中的主要氧化物有CaO、SO_(3)、SiO_(2)、Fe_(2)O_(3)、K_(2)O、Na_(2)O、Al_(2)O_(3)、SrO、BaO、P_(2)O_(5)、TiO_(2)、MgO、CuO、NiO,次量元素有Pb、Cd、Cr、Hg、As、Zn、Sb、Mn、Mo、V,微量元素有Be、Se、Pt、Au、W、Pd、Sn。The chemical composition of phosphogypsum,including the content of major compounds and impurity elements is analyzed,to provide theoretical guidance for the comprehensive utilization risk assessment of phosphogypsum.Taking phosphogypsum and modified phosphogypsum as the research object,the chemical composition and content were determined by X-ray powder diff(XRD),X-ray fluorescence spectrometry(XRF),and inductively coupled plasma emission spectrometry(ICP-OES).The results show the main minerals of phosphogypsum are composed of a mixed phase of dihydrate calcium sulfate,hemihydrate,and anhydrous calcium sulfate,the main impurities are calcium silicate and mixed salts of silicon,aluminum,phosphorus,and fluorine;the main oxides in phosphogypsum include CaO,SO_(3),SiO_(2),Fe_(2)O_(3),K_(2)O,Na_(2)O,Al_(2)O_(3),SrO,BaO,P_(2)O_(5),TiO_(2),MgO,CuO,NiO,and the trace elements include Pb,Cd,Cr,Hg,As,Zn Sb,Mn,Mo,V,and the trace elements include Be,Se,Pt,Au,W,Pd,Sn.

关 键 词：磷石膏 化学成分 重金属 二水硫酸钙 工业固体废物 综合利用 

分 类 号：TD923[矿业工程—选矿]