Selective Leaching Trace Elements from Bauxite Residue (Red Mud) without and with Adding Solid NH4Cl Using Microwave Heating

Bauxite residue (red mud), which is an industrial byproduct, contains valuable trace elements. Solid NH4Cl was used as a chlorinating agent during the microwave heating of red mud to convert elements into soluble metal chloride. Red heated using ovens under various conditions (i.e., with addition solid and range output powers times). Leaching tests were then conducted deionized (DI) water on microwave-heated leach from mud. V, Cr, As selectively leached slurry (30% content), whereas Mn, Cu, Co, Ni, Zn, Pb NH4Cl. The oxides in could be transformed chlorides by chlorination, are insoluble water, or easily volatilized when presence On other hand, rapidly irradiating, resulting Those relatively leading higher leaching efficiency for Experimental results suggest that can without