Calcination furnace

A calcination furnace comprising:

• a furnace chamber including at least one furnace chamber section;
• and
• heat source units;
• said furnace chamber section being divided into a plurality of regions in which calcined intermediate products are received;
• said regions being arranged so as to cause heat interference to occur among said regions;
• said heat source units being arranged in said regions of said furnace chamber section, respectively;
• said heat source units being driven while exhibiting time-temperature characteristic patterns in which exotherm is varied with time so as to cause a time delay to occur among the time-temperature characteristic patterns.

A calcination furnace comprising:

• a furnace body in which a furnace chamber is defined, said furnace chamber including a first furnace chamber section constituting a calcination chamber and at least one second furnace chamber section;
• said second furnace chamber section including a combustion heater means;
• said second furnace chamber section being arranged adjacent to said calcination chamber and partitioned from said calcination chamber through a heat transfer partition;
• and
• an additional heat source means arranged in said calcination chamber.