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| Improving the Analytical Method for Determination of Calcium Oxide in Blast Furnace Slag |
| Received:May 26, 2011 Revised:June 28, 2011 |
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| DOI：10.3969/j.issn.2095-1035.2011.03.0013 |
| KeyWord:blast furnace slag; calcium oxide; EDTA titrimetric method |
| Author | Institution |
| FU Yongji |
湖南东港锑品有限公司, 湖南 永州 |
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| Abstract: |
| Based on the methodology of DHF83B high speed multi-element analysis instrument, we improved the analytical method for determination of calcium oxide in blast furnace slag. We used (1+1) hydrochloric acid to dissolve sample, and use triethanolamine as the masking agents for the residual elements including iron, aluminum, manganese and so on. At pH bigger than 12, EDTA standard solution was used to titrate calcium oxide using calcium indicator as the titration indicator and the content of calcium oxide was determined. Relative standard deviation (RSD) of the EDTA titrimetric method is 2.82%, and the analytical results are basically consistent with those obtained according to the DHF83B methodology. It concluded that our method is accurate, fast and simple and is suitable for application in determination of calcium oxide in melt furnace slag. |
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