Study on Microwave Roasting of Diaspore

Roasting process of diaspore by microwave was tested in order to decrease the digestion temperature,the effects of operation parameters such as NaOH addition,roasting temperature and roasting time were investigated,the digestion performance of roasting ore and head ore were comparatively studied,and the microstructure of roasting ore was analyzed by SEM.The optimal conditions is 100 kg/t NaOH addition,535℃ roasting temperature,and 5 min roasting time,short microwave irradiation time has obvious influence on microstructure of roasting ore.