Method and apparatus for continuously producing a cement clinker
OwnerTadashi Ogawa, Shunichiro Ono +1inventors
InventorsTadashi Ogawa, Shunichiro Ono, Kyoichi Shibuya
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Abstract
A cement clinker is produced by utilizing a combustible waste material as a fuel for preheating or calcining a cement material, by using an apparatus comprising a cement material feeder, a preheater or calcinator, a rotary kiln, cooler and means for flowing an exhaust gas from the rotary kiln to the preheater or calcinator, which apparatus is characterized by a heat-decomposer which is located between the preheater or calcinator and the rotary kiln and in which a combustible material is heat decomposed with an exhaust gas from the rotary kiln and the resultant combustible gas is burnt in the preheater or calcinator.
Claims11
An improved method for continuously producing a cement clinker, comprising the steps of:
- feeding a cement material into a preheating or calcining region;
- preheating or calcining said fed cement material in a predetermined temperature range;
- forwarding said preheated or calcined cement material into a heating region;
- heating said preheated or calcined cement material at a predetermined temperature to convert said cement material to a cement clinker;
- moving said cement clinker into a cooling region;
- cooling said cement clinker with cooling air to a decreased temperature, and;
- flowing an exhaust gas from said heating region through said preheating or calcining region, which method is characterized by the steps of:
- feeding a combustible material into a heat-decomposing region located betwen said heating region and said preheating or calcining region;
- introducing at least a portion of said exhaust gas from said heating region into said heat-decomposing region to heat-decompose said combustible material and to generate a combustible gas therefrom;
- introducing said combustible gas from said heat-decomposing region into said preheating or calcining region, and;
- burning said combustible gas in said preheating or calcining region to preheat or calcine said cement material.
Dependencies are inferred from the claim text.