Engineering and Contracting . e kiln. This storage basin has its bottom 16 ft. be-low floor level and is mechanically agitated by three ver-tical agitators. The almost universal practice previously has been topump the slurry from the storage basin to the kilnfeeder, using three plunger vertical motor driven to the nature of the material it is hard to pump,and the wear on piston plungers is great, as is the ex-pense of renewing packing, which must be of the highestgrade; also a large quantity of oil is required for lubri-cation. If the packing is not perfect, the pumps soon December
Engineering and Contracting . e kiln. This storage basin has its bottom 16 ft. be-low floor level and is mechanically agitated by three ver-tical agitators. The almost universal practice previously has been topump the slurry from the storage basin to the kilnfeeder, using three plunger vertical motor driven to the nature of the material it is hard to pump,and the wear on piston plungers is great, as is the ex-pense of renewing packing, which must be of the highestgrade; also a large quantity of oil is required for lubri-cation. If the packing is not perfect, the pumps soon December 27, 1916Vol. XLVI. No. 26 become very dirty and the floor covered with semi-liquidslurry. To overcome this, the writer designed a reinforced con-crete continuous bucket elevator casing as shown in , 7 ft. 6 in. by 6 ft. 6 in. outside, and 70 ft. 52 in. inheight. In order that continuous operation might be as-sured, a center partition divides the elevator into twoseparate units, so that in case of trouble on one side the. Fig. 2—View Looi<ing Up atTop of Elevator. Fig. 2—General View of Elevatorand Feed End of Kiln. other side may be placed into service, and used to feedthe kiln; or should a chain break with slurry in the leg,by closing a valve to the storage basifi, the other eleva-tor can be used to empty the damaged one for repairs. It will be noted that the slurry is fed into the bottomof the two elevators, through 8-in. pipes connected eachthrough a gate valve and tee to a common 8-in. pipe,concreted into the bottom of the storage basin. There-fore the slurry stands at the same level in the elevatorlegs as it does in the basin, and the elevators must standthe bursting pressure of a head of 26 ft. of slurry weigh-ing about 108 lb. per cubic foot, and containing about40 per cent water. The walls as built are only 9-in. thick, and are abso-lutely watertight. No waterproofing solution was used,nor were the walls plastered. The concrete mixture for the first 31 ft.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
