Abstract：After the sample of blast furnace slag was decomposed completely by hot dilute nitric acid and hydrofluoric acid, three portions of this test solution were taken. One of the test solution was used for determination of silicon dioxide by silicon molybdenum blue differential spectrophotometry at 680 nm wavelength after adjusting the acidity with hydrochloric acid The other two test solutions were used respectively for the determination of calcium oxide and total calcium oxide and magnesium oxide by EDTA titration with calcium indicator and PAN indicator to indicate the titration end point, and then the content of magnesium oxide was obtained by subtractionThis method has been applied to the determination of silicon dioxide, calcium oxide and magnesium oxide in blast furnace slag and standard samples The results by this method were compared with Xray fluorescence spectrometry determination results The results displayed the testing results of two methods in line The relative standard deviations were smaller than 2.7% (n=8)
王鹏辉. 高炉渣中硅、钙、镁的湿法分析[J]. 冶金分析, 2012, 32(5): 70-74.
WANG Peng-hui. Wet chemical analysis of silicon, calcium and magnesium in blast furnace slag. , 2012, 32(5): 70-74.
