铁矿石灼烧减量测试新方法——热重分析法.pdf

2010年08月
岩矿测试
Vol 29, No 4
August 2010
ROCK AND MINERAL ANALYSIS
399405
文章编号:0254-5357(2010)04-0399-07
铁矿石灼烧减量洳试新方法一热重分析法
陈贺海',张爱珍',余清,任春生,廖海平',应海松,杨勇2,华正江3,刘尊武4
(1.宁波出人境检验檢疫局铁矿检测中心国家级重点实验室,浙江宁波315800;
2.上海出人境检验检疫局,上海200135;3.宁波出人境检验检疫局技术中心,浙江宁波315012;
4. Mettler- Toledo仪器(上海)有限公司,上海200233)
摘要:采用热重分析法(TGA)测量铁矿石样品灼烧减量,对保温时间、加热温度、加热速率和工作气氖等
工作条件进行了系统研究,确立TGA法适宜的工作条件为:20℃/min加热至1000℃,保温30min,全程选
用高纯気为工作气体。对多种进口铁矿石样品采用TGA法和常规马弗炉加热法进行测量,对比结果表
明,TGA法具有方便快捷、准确可靠、适用范围宽、样品消耗量小等优点,且可以清楚监控样品失重全过
程,为铁矿石挥发分的成分分析提供有力的数据参考
关键词:灼烧减量;铁矿石;热重法
中图分类号:0655.1;P578.12
文献标识码:B
A New Method for the Determination of Loss on Ignition in Iron Ores
Thermogravimetry
CHEN He-hai, ZHANG Ai-zhen YU Qing, RE Chun-sheng, LIAO Hai-ping
YING Hai-song YANG Yong, HUA Zheng-jiang, LIU Zun-wu
1 State Key Laboratory of iron Ore, Iron Ore Test Center of Ningbo Entry-exit Inspection and
Quarantine Bureau, Ningbo 315800. China
2. Shanghai Entry-exit Inspection and Quarantine Bureau, Shanghai 200135, China
Technique enter of Nin Entry-exit Inspection and Quarantine Bureau, Ningbo 315012, China
4. Mettler-toledo Apparatus Ltd. Shanghai 200233, China)
Abstract: A new method for the determination of loss on ignition in iron ores-thermogravimetry analysis(TGA)
was developed. The measurement conditions were systematically studied and optimized. Samples were heated
to 1000C with heating rate of 20C/min and held for 30 min under the protection with high pure argon flow rate
of 50 ml/min throughout the experiments. The results of comparative test of TGA with traditional method(mul
furnace burning )for various kinds of imported iron ores showed that the TGV method provided the advantages of
higher accuracy and reliability, more convenience, wide application range, smaller sample consumption and was
especially suitable for the analysis of volatile components in iron ores
Key words: loss on ignition; iron ore; thermogravimetry
近年来随着我国钢铁工业的迅猛发股,铁矿石石品质的要求越来越严格。铁矿石灼烧减量
进口量逐年上升,价格居高不下,贸易各方对铁矿(LOI)不仅关系到铁矿石有效利用量,更与治炼过
收稿日期:2009408-26;修订日期:2009-11
基金项目:直属局方法研究项目资助(甬FO6-2009)
作者简介:陈贺海(1979-),男,河北邯郸人,博土,工程师,从事岩石学、矿物学及地球化学研究工作。
E-mail: bl. chenhh@ nbeiq gov cn
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