abstract |
The present specification comprises the steps of preparing a mixture by mixing aluminum oxide, silicate mineral, binder and zero iron; Extruding the mixture to produce an extrudate; And drying and calcining the extrudate; The calcining step, the calcination by heat treatment in a temperature range of 1000 ℃ to 1300 ℃, or Disclosed is a method for manufacturing a ceramic ball, characterized in that it is fired by a first microwave treatment. |