地质实验测试中高品位铁的测定  

Determination of High Grade Iron in Geological Experimental Testing

作　　者：王长萍 蔡万山 WANG Changping;CAI Wanshan(Baiyin mineral exploration institute,Gansu Non-ferrous Metal Geological Exploration Bureau,Baiyin 730900,China)

机构地区：[1]甘肃有色金属地质勘查局白银矿产勘查院,甘肃白银730900

出　　处：《化工管理》2024年第6期63-66,共4页Chemical Engineering Management

摘　　要：文章介绍了一种新的测铁方法——重铬酸钾法,其利用盐酸对样品进行加热分解后,让铁矿石中的铁变成氧化铁,并用氯化亚锡将Fe^(3+)转化为Fe^(2+),以钨酸钠为指示试剂,再用三氯化钛将余下的小部分Fe^(3+)转化成Fe^(2+)至颜色变成钨蓝色,然后用重铬酸钾标准液将其氧化,直至蓝色变淡到无色为止,之后加入配制好的硫磷混酸,以二苯胺磺酸钠作为指示剂,再用重铬酸钾溶液滴定,最后对铁矿石中的铁含量进行分析计算。对试验结果的准确度、精密度进行数据统计分析,并同时进行方法比对试验,结果表明该方法操作简便、分析速度快、灵敏度高、具有良好的准确度和精密度,并且此次试验方法与国家标准方法的测定结果没有显著性差异。This paper introduces a new method for measuring iron——potassium dichromate method.Using hydrochloric acid to heat and decompose the sample,the iron in the iron ore is transformed into iron oxide.Using Tin(II)chloride to convert Fe^(3+)into Fe^(2+),using sodium tungstate as the indicator reagent,and then using Titanium(III)chloride to convert a small part of the remaining Fe^(3+)into Fe^(2+)until the color becomes tungsten blue.Then,using the standard solution of potassium dichromate to oxidize it until the blue turns pale to colorless.The iron content in iron ore was analyzed and calculated by adding the prepared mixed acid of sulfur and phosphorus,sodium diphenylamine sulfonate as the indicator reagent,and titrating with potassium dichromate solution.By conducting data statistical analysis on the accuracy and precision of the experimental results,and conducting method comparison experiments,the results showed that the method was simple to operate,fast in analysis speed,high in sensitivity,and had good accuracy and precision.There was no significant difference between the measurement results of this experimental method and the national standard method.

关 键 词：地质实验测试 高品位铁 重铬酸钾法 

分 类 号：P5[天文地球—地质学]