Heat treatment process is to aluminum sulfate and/or ammonium sulfate ammonia alum

摘要

In the present invention, the heat treatment process for being disclosed a kind of ammonia alum is dehydrated aluminum sulfate and/or ammonium sulfate in single-stage and thermal decomposition: the method proposed is characterized in that, by being dehydrated alum, by heating in fluidized bed and there is the period minute that continuous temperature is 10 to 60 from room temperature to 350 degC by multiple regions. Then,Dehydrated products particle size is adjusted less than 0.4 millimeters and be then subjected to thermal decomposition by be heated to range be 550 to 700 15 to 75 minutes degC times, to provide crystallization aluminium sulfate. It obtains by absorbing the thermal decomposition of gaseous component ammonium sulfate solution and crystalline ammonium sulfate is then crystallized by optional its and can be obtained.