Method and apparatus for calcining mineral raw materials...

F - Mech Eng,Light,Heat,Weapons – 27 – B

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39/46, 39/52

F27B 1/02 (2006.01) C04B 2/12 (2006.01) F27B 1/00 (2006.01) F27B 1/04 (2006.01)

Patent

CA 1160045

Abstract of the Disclosure Fine particulate solid fuel is utilized in the calcining or uniflow shaft of a uniflow regenerative shaft furnace having outlet openings of fuel lances of the furnace arranged with a uniform distribution over the cross-section of the furnace shaft in a horizontal plane between the preheating zone and the calcining zone of the furnace. The fuel feed is maintained constant with time by a dosing system through which fuel is supplied through feed lines to the fuel lances. Due to the uniform distribution of solid fuel which is accomplished, a calcined material is obtained which has a quality comparable to that which may be achieved through calcining with gaseous or liquid hydrocarbons.

387813

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