电感耦合等离子体原子发射光谱法用于锰矿石中碳酸锰、氧化锰和硅酸锰的物相分析  

Application of inductively coupled plasma atomic emission spectrometry in phase analysis of manganese carbonate,manganese oxide and manganese silicate in manganese ore

作　　者：姜云 周鑫 陈明桂 夏传波 JIANG Yun;ZHOU Xin;CHEN Minggui;XIA Chuanbo(Shandong Institute of Geological Sciences,Ji'nan 250013,China;Shandong Provincial Key Laboratory of Metallogenic Geological Process and Resource Utilization,Ji'nan 250013,China)

机构地区：[1]山东省地质科学研究院,山东济南250013 [2]山东省金属矿产成矿地质过程与资源利用重点实验室,山东济南250013

出　　处：《冶金分析》2024年第1期81-86,共6页Metallurgical Analysis

基　　金：山东省地质勘查项目(鲁勘字[2021]8号);国家重点研发计划(2021YFC2903001)。

摘　　要：锰矿石中含锰矿物种类繁多、分类复杂,但目前锰矿石物相分析手续繁琐,流程不统一,缺少操作细节描述。实验选择了不同矿区、不同类型含量的锰矿石,通过单矿物实验选择浸取剂,建立了50 g/L硝酸铝沸水浴60 min浸取碳酸锰,30 g/L硫酸羟胺-1%(V/V)硫酸沸水浴60 min浸取氧化锰,残渣经酸分解得到硅酸锰,使用电感耦合等离子体原子发射光谱法(ICP-AES)测定处理的溶液中锰,建立了锰矿石化学物相分析方法。方法的检出限分别为(以锰计):碳酸锰相0.000 3%,氧化锰相0.000 5%,硅酸锰相0.000 3%。按照实验方法测定1个碳酸锰原矿和1个氧化锰原矿,测定结果的相对标准偏差(RSD,n=12)小于5.0%,满足DZ/T 0130.3—2006《地质矿产实验室测试质量管理规范》的要求。实验方法用于测定锰矿石化学物相分析标准物质GBW(E)070256(碳酸锰矿)和GBW(E)070258(氧化锰矿),主相态测定结果的相对误差(RE)小于1%,其他相态相对误差小于10%,同样满足DZ/T 0130.3—2006的要求。There is a great variety of manganese-containing minerals in manganese ore,and the classification is complex.However,the current methods for phase analysis of manganese ores have some disadvantages such as tedious operations,inconsistent procedures,and lack of detail description.In experiments,the manganese ores with different types and contents from various mining areas were selected.The monomineral test was conducted to select the leaching agent.Manganese carbonate was leached with 50 g/L aluminum nitrate in boiling water bath for 60 min.Manganese oxide was leached with 30 g/L hydroxylamine sulfate-1%(V/V) sulfuric acid in boiling water bath for 60 min.The residue was decomposed with acid to obtain manganese silicate.The content of manganese in treated solution was determined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The method for the chemical phase analysis of manganese ore was established.The limits of detection were(in manganese):0.000 3% for manganese carbonate phase,0.000 5% for manganese oxide phase,and 0.000 3% for manganese silicate phase.One manganese carbonate raw ore and one manganese oxide raw ore were determined according to the experimental method.The relative standard deviations(RSDs,n=12) of determination results were less than 5.0%,which could meet the quality management requirements in DZ/T 0130.3-2006 The specification of testing quality management for geological laboratories.The proposed method was applied for the determination of certified reference materials of manganese ore for chemical phase analysis,i.e.,GBW(E)070256(manganese carbonate ore) and GBW(E)070258(manganese oxide ore).The relative errors(REs) of determination results of main phases were less than 1%.For other phases,the REs were less than 10%,which also could meet the requirements in DZ/T 0130.3-2006.

关 键 词：锰矿石 物相分析 碳酸锰 氧化锰 硅酸锰 电感耦合等离子体原子发射光谱法(ICP-AES) 

分 类 号：O657.31[理学—分析化学] TF031[理学—化学]