《Table 3 Leaching results of clinker in alkaline solution at 383 K and Na OH concentration of 160 g/

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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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Clinker:Roasting raw meal with Fe2O3/Al2O3/C molar ratio of 1.2:2.0:1.2 at 1373 K for 60 min

In general，natural minerals such as hercynite，quartz and cristobalite are difficult to dissolve in dilute alkali solution at atmospheric pressure，while the amorphous silica decomposed from kaolinite by the traditional roasting is readily soluble as mentioned in Section 4.2.1.Nevertheless，there is doubt that the quartz solid solution and cristobalite solid solution are able to dissolve in such a system.Thus，the separation of alumina and silica in clinker was conducted experimentally in alkali solution and the results are shown in Table 3.