Abstract:The leaching behavior of calcium aluminate slag from blast furnace under microwave radiation heating was investigated.The influences of microwave radiation power,the concentration of leaching solution Na_2O_c and the ratio of liquid to solid on the slag leaching reaction are discussed and compared with traditional heating.The results indicate that the alumina leaching rate and temperature of reaction system both increase with microwave power,and the temperature of reaction system is not constant before the leaching solution reaches the boiling point.Compared the microwave radiation heating with traditional heating,it is found that the leaching rate of alumina from slag is much faster heated by microwave radiation,the mass concentration of Na_2O_c solution can be reduced with shortened time under microwave radiation heating.