Abstract：The silicate-calcium, silicon-calcium-barium, silicon-aluminum-calcium-barium and other calcium alloys are deoxidizer for steelmaking. The calcium oxide impurities in alloy are not effective deoxidation component, which however would introduce oxygen and affect the product quality greatly. It is significant to establish a method for determining calcium oxide in calcium alloys. Under heating conditions, calcium oxide in calcium alloy reacted with the mixed solution of glycerol and absolute alcohol, producing weakly-alkaline complex which was then titrated by benzoic acid standard solution. Thus, a potentiometric titration method for the rapid determination of calcium oxide in calcium alloy was established. In the reaction, the solvent used in the method only reacted with the calcium oxide in the calcium-containing alloy quantitatively, forming corresponding compound which was free from interference by other forms of calcium. The proposed method has been applied to the determination of calcium oxide in calcium alloy samples. The relative standard deviation (RSD) was less than 2.5%, and the recoveries were between 99% and 106%.
李文博,包燕平,王敏,等.不同钙合金对钢液脱砷作用的实验研究[J].工程科学学报,2016,38(4):484-493.LI Wen-bo,BAO Yan-ping,WANG Min,et al.Experimental study on dearsenization of molten steel with different Ca alloys[J].Chinese Journal of Engineering,2016,38(4):484-493.
[2]
王世栋,高晓雷,李权,等.金属钙、钙合金的制备与应用研究进展[J].材料导报,2012,26(4):1-5.WANG Shi-dong,GAO Xiao-lei,LI Quan,et al.Research progress in the preparation and applications of metal calcium and its alloys[J].Materials Review,2012,26(4):1-5.
[3]
李韶梅,侯艳冰.X射线荧光光谱法测定硅钙合金中的硅和钙[J].河北冶金,2001(3):23-24.LI Shao-mei,HOU Yan-bing.Determination of silicon and calcium in silicon-calcium alloy with fluorescent X-ray chromatography[J].Hebei Metallurgy,2001(3):23-24.
[4]
周垣,太井超,杨觎.X射线荧光光谱法分析硅钙复合脱氧剂中的硅、钙含量[J].天津冶金,2013(4):58-60.ZHOU Yuan,TAI Jing-chao,YANG Yu.Measurement of silicon and calcium contents in Si-Ca complex deoxidizer with X-ray fluorescence spectrometry[J].Tianjin Metallurgy,2013(4):58-60.
[5]
郑会清,王翠翠,张有毅.ICP-OES 法测定硅钙钡合金中主量和微量元素[J].广州化工,2013,41(21):98-99.ZHENG Hui-qing,WANG Cui-cui,ZHANG You-yi.The content determination of main and micro content elements in Si-Ca-Ba alloy by ICP-OES[J].Guangzhou Chemical Industry,2013,41(21):98-99.
[6]
孟平,陆军,龙如成.ICP-AES内标法测定硅钙钡合金中的元素[J].金属制品,2005,31(1):45-46.MENG Ping,LU Jun,LONG Ru-cheng.Elements determination in silicon-calcium-barium alloy with internal standard by ICP-AES[J].Steel Wire Products,2005,31(1):45-46.
[7]
牟新玉,王昔文.ICP-AES法测定硅钙合金中钙、铁含量[J].安徽冶金,2011(3):16-17.MOU Xin-yu,WANG Xi-wen.Determination of Ca and Fe contents by ICP-AES method[J].Anhui Metallurgy,2011(3):16-17.
[8]
张兴梅.ICP-AES法测定硅钙合金中Si和Ca的试验[J].哈尔滨理工大学学报,2001,6(6):67-68.ZHANG Xing-mei.ICP-AES method for Si and Ca content mesurment in Si-Ca alloy[J].Journal of Harbin University of Science Technology,2001,6(6):67-68.
[9]
薛光荣,沈志希.硅钙合金中钙含量的测定[J].光谱实验室,2006,23(1):55-57.XUE Guang-rong,SHEN Zhi-xi.Measurement of calcium in the silicon calcium alloy[J].Chinese Journal of Spectroscopy Laboratory,2006,23(1):55-57.
[10]
刘建华,戴文杰,常欢.EDTA络合滴定法联合测定硅钙钡镁合金中钙钡镁[J].冶金分析,2015,35(2):70-73.LIU Jian-hua,DAI Wen-jie,CHANG Huan.Combined determination of calcium,barium,magnesium in silicon-calcium-barium-magnesium alloy by EDTA complexometric titration[J].Metallurgical Analysis,2015,35(2):70-73.
[11]
董丙成,沈彬彬,董洪壮.EGTA 滴定法测定硅钙钡合金中钙钡方法的研究[J].莱钢科技,2012(3):65-67.DONG Bing-cheng,SHEN Bin-bin,DONG Hong-zhuang.Research on the determination of Ca and Ba in Si-Ca-Ba alloy by EGTA titration[J].Laigang Science & Technology,2012(3):65-67.
[12]
沙艳梅,赵学沛,王明军,等.硅钙钡镁合金中钡钙镁的测定[J].岩矿测试,2004,23(4):308-310.SHA Yan-mei,ZHAO Xue-pei,WANG Ming-jun,et al.Determination of barium,calcium,magnesium in Si-Ca-Ba-Mg alloy[J].Rock and Mineral Analysis,2004,23(4):308-310.
[13]
雷利珑,沈九凤.硅钙合金中硅钙联合测定[J].铁合金,2009(3):47-48.LEI Li-long,SHEN Jiu-feng.Determination of silicon and calcium in silicon-calcium alloy[J].Ferro-alloys,2009(3):47-48.
[14]
张建珍,樊晓红,薛丽华. EDTA 络合滴定法连续测定铁矿石中钙和镁[J].冶金分析,2011,31(8):74-78.ZHANG Jian-zhen,FAN Xiao-hong,XUE Li-hua.Continuous determination of calcium and magnesium in iron ore by EDTA complexometric titration[J].Metallurgical Analysis,2011,31(8):74-78.
[15]
邢春会,王丽晖,张秋会,等.XRF熔融法测定铁矿石中的铁硅钙镁铝锰磷[J].辽宁化工,2009,38(10):767-769.XING Chun-hui,WANG Li-hui,ZHANG Qiu-hui,et al.XRF analysis of iron ores by fusion[J].Liaoning Chemical Industry,2009,38(10):767-769.
