《Table 1 Chemical compositions of kaolin, high-silica bauxite, roasted kaolin and clinker (wt.%)》

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《还原焙烧高岭土中氧化铝和氧化硅的碱浸高效分离（英文）》

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The chemical compositions of kaolin，roasted kaolin，clinker and high-silica diasporic bauxite are shown in Table 1.The major chemical compositions in kaolin are Al2O3 and SiO2，accounting for 37.09%and45.10%，respectively.Moreover，other impurities，such as Fe2O3，TiO2 and K2O，are also observed in small quantities and the quartz content in kaolin is about 1.46%calculated by A/S.After roasting at 1273 K for 60 min，the chemical compositions in roasted kaolin significantly increase compared with those in kaolin for dehydration.As for the clinker，besides Al2O3 and SiO2，Fe2O3 is also one of the major chemical compositions.In high-silica diasporic bauxite，the A/S is 3.65 with 59.53%Al2O3 and16.30%SiO2.