作者：张珂, 吴园园, 董登超, 年季强

作者单位：江苏省(沙钢)钢铁研究院, 江苏 张家港 215625

关键词：镁碳砖;显微结构;成分分析;综合研究

摘要：

为对镁碳砖的物理显微结构及化学含量组分进行系统研究,采用光学显微镜、电子探针及能谱仪、X射线衍射仪等物理设备对微观结构和物相组成进行分析,并利用X射线荧光光谱仪、碳硫分析仪对主要成分进行含量测定,同时利用电感耦合等离子体发射光谱仪和湿法分析进行结果验证。结果表明:镁碳砖的基本结构由块状MgO及间隙中大量C元素组成,部分还含有Al单质颗粒,或少量片状Ca、Si化合物且多分布于MgO边缘。X射线衍射等物理方法方便快捷,检出物相全面,可根据需要选择K值法或全谱拟合法进行半定量分析,更适合对镁碳砖质量的优劣进行初步筛选判断,化学检测手段准确度高,相互配合使用更适合进行成分的准确测定。

Comprehensive study on microstructure and composition analysis methods of magnesia-carbon brick

ZHANG Ke, WU Yuanyuan, DONG Dengchao, NIAN Jiqiang

Institute of Research of Iron and Steel, Jiangsu Province and Sha-Steel, Co., Ltd., Zhangjiagang 215625, China

Abstract: To analyze systematically the microstructures and compositions of magnesia-carbon bricks, have examined the microstructures and phase compositions with physical equipments such as optical microscope (OM), electronic probe micro-analyzer (EPMA), energy disperse spectroscopy (EDS) and X-ray diffractometer (XRD), determined the contents of main components with a X-ray fluorescence spectrometer (XRF) and a carbon-sulfur analyzer (CS), and verified the conclusions with the ICP-OES and chemical analytical methods. The test results show that the block-shaped MgO and the massive graphite filled in the gap are the essential components of the magnesia-carbon brick, and a number of Al particles or a small amount of flaky Ca, Si compounds are distributed at the edge of MgO. The physical phases are fully detected with the physical methods, which is more suitable for the preliminary judgment of brick quality. The K-value method and the full pattern fitting method are used for semi-quantitative analysis. However, the chemical methods with higher accuracy could cooperate with physical methods to determinate exact chemical composition.

Keywords: magnesia-carbon brick;microstructure;composition analysis;comprehensive study

2016, 42(2): 51-55  收稿日期: 2015-5-3;收到修改稿日期: 2015-7-28

基金项目: 

作者简介: 张 珂(1982-),男,湖北京山县人,高级工程师,博士,主要从事钢材材料表征工作。

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