Abstract: An apparatus for manufacturing cement clinker is disclosed in which raw material powder of cement pre-heated and partially pre-calcined by a pre-heating unit such as a suspension pre-heater (or a provided pre-calciner') is charged into a granulating furnace as to be granulated, thus-obtained granulated material is charged into a sintering furnace as to be sintered, and the sintered material is cooled and recovered by a cooling unit, the apparatus having a granulating furnace so that the granulating performance of the granulating furnace is improved.

Abstract: An apparatus for sintering a cement clinker in which preheated powdered raw materials are granulated and sintered in a single fluidized bed granulating and sintering furnace. The apparatus includes a first classifying station having a discharging grooved portion extending from the fluidized bed furnace to an opening in a radial direction and communicating with a gas distributor. The space above the discharging grooved portion diverges from the opening to a fluidized bed upstream of the gas distributor so that the total velocity of air blown through the opening and from nozzles in the discharging groove is constant. A second classifying station is in communication with the opening for blowing back small particles to the fluidized bed. In a third classifying station, a discharge chute is connected to a fluidized bed cooling unit for quenching granulated and sintered clinker while small particles are blown back to the granulating and sintering furnace.

Abstract: A sintering method of cement clinkers in which preheated cement raw material powder is granulated and sintered in a fluidized bed granulating and sintering furnace, and granulated and sintered clinkers are introduced into a cooling device, for manufacturing high-quality cement clinkers by use of a single fluidized bed-granulating and sintering furnace efficiently with a small heat loss, wherein clinkers are discharged from the fluidized bed granulating and sintering furnace through a clinker dropping hole which is provided in a fluidizing gas distributor of the furnace or in a radial direction extending from the gas distributor, an opening area of the clinker dropping hole is regulated by a gate portion to maintain the differential pressure in a fluidized bed within a predetermined range, air for classifying and cooling the clinkers is blown into a discharge chute connected to the clinker dropping hole, the amount of the blown air is regulated to make the flow velocity of the air blowing from the clinker drop

Abstract: A method of sintering cement clinker is provided including the steps of introducing raw material for cement to a spouted fluidized bed granulating furnace which includes a perforated distributor having a plurality of nozzle holes; passing fluidizing gas through at least one of the plurality of nozzle holes into the spouted fluidized bed granulating furnace while simultaneously blowing classifying gas at a selected flow velocity that is different from the flow velocity of the fluidizing gas into the spouted fluidized bed granulating furnace through a dropping port arranged facing and between the fluidized bed of the spouted fluidized bed granulating furnace and in communication with a fluidized bed sintering furnace; granulating the raw material in the spouted fluidized bed granulating furnace; discharging granules formed in the spouted fluidized bed granulating furnace into the fluidized bed sintering furnace while classifying the granules with the classifying gas; and sintering the granules injected into the

Abstract: An apparatus for sintering cement clinker with a spouted fluidized bed granulating furnace and a fluidized bed sintering furnace is provided which includes a perforated distributor having a multiplicity of nozzle holes through which gas for granulating injected raw material for cement while spouting and fluidizing the same is introduced; a dropping port through which granulated raw material for cement is discharged and which is disposed to face a spouted fluidized bed, wherein classifying gas is introduced through the dropping port at a classifying flow velocity which is selected to be different from a flow velocity of gas to be introduced through the multiplicity of nozzle holes into the spouted fluidized bed granulating furnace, and means is provided therein to discharge the granulated raw material for cement while classifying the same by using the effect of the classifying gas which is introduced through the dropping port; and an injection chute for injecting the granulated raw material for cement from the

Abstract: An apparatus for manufacturing cement clinker is disclosed in which raw material powder of cement pre-heated by a pre-heating unit such as a suspension pre-heater and pre-calcined by a calciner is charged into a granulating furnace as to be granulated, thus-obtained granulated material is charged into a sintering furnace as to be sintered, and the sintered material is cooled and recovered by a cooling unit, the apparatus having a granulating furnace so that the granulating performance of the granulating furnace is improved.

Abstract: A valve having a flow path in the form of a Venturi tube having a throttle and flow path sections extending and flaring from the opposite sides of the throttle to an inlet and outlet, respectively, and a cylindrical valve plug provided at the throttle and selectively movable at right angles to the flow path to present a flow path end into the flow path and having a semi-spherical valve head at the flow path end with a notch having a length in the direction of movement of the valve plug less than the diameter of the throttle formed in a portion of the valve head and the remaining portion of the valve head containing a diametrical line connecting opposite portions of the valve head in contact with the wall of the throttle while occupying a major portion of the surface of the valve head facing a flow in the flow path.