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Bayer red mud (RM) is an alumina refinery waste product rich in aluminum oxides and alkalis which are present primarily in the form of sodium hydro-aluminosilicate desilication product (DSP). A hydrothermal process was employed to recover alumina and alkali from “Fe-rich” and “Fe-lean” RM, the two representative species of RM produced in China. The hydrothermal process objective phase is andradite-grossular...
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