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Kaolin Processing To Obtain Alumina

The kaolin was calcined into metakaolin at a heating rate of 10176Cmin and the sample was kept for 25 h at 800176C to loosen the alumina components Chemical composition of Kaolin and Metakaolin is shown in Table 1 Then the metakaolin was leached with concentrated hydrochloric acid 6 M at 90176C under stirring for 35 h then suspension was

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