Materials — magnesia, high alumina clinker and zircon sand were used Meilv refractory clinker. In the calcined materials, is now the end of their physical and chemical changes, magnesia 
alumina refractory ball during sintering and Al2O3 in magnesia MgO and high alumina clinker will generate magnesia alumina spinal and its formation temperature began to 800~10001200~1300 DEG C to generate speed to accelerate, 1500 to 1600 DEG C and the production rate of up to 95% near the end. Therefore magnesium refractory ball in firing in the physical and chemical changes is relatively simple, only mg Al spinal formation and again present in liquid phase, dissolved attack, crystallization, crystallization, crystal growth with large length and, at the end of the sample reaches the sintering.
alumina refractory ball during sintering and Al2O3 in magnesia MgO and high alumina clinker will generate magnesia alumina spinal and its formation temperature began to 800~10001200~1300 DEG C to generate speed to accelerate, 1500 to 1600 DEG C and the production rate of up to 95% near the end. Therefore magnesium refractory ball in firing in the physical and chemical changes is relatively simple, only mg Al spinal formation and again present in liquid phase, dissolved attack, crystallization, crystallization, crystal growth with large length and, at the end of the sample reaches the sintering.
Magnesia refractories if in the down draft kiln firing, understanding high fever to temperature 1500~1580 DEG C insulation time for 12 ~ 15 h, in the kiln to weak oxidizing atmosphere.
Magnalium refractory material in the kiln internal use brick scaffolding, in brick frame with mg Al ball billet should be using neutral kiln sand separated, to echo each other anti firing.
High pressure forming of magnesia refractories in stomata rate, compressive strength, heat capacity of expensive, heat conduction rate, thermal stability and load softening temperature etc. function than shapes technology of (i.e. low or medium pressure to form a ball) magnesia alumina refractory ball to winning more. Magnalium refractory material especially in high temperature, thermal shock, volume density, thermal storage ability is better than aluminum ball. Therefore in the magnesium ball furnace to medium-sized, large ball can replace the aluminum ball.
