Re: Aerated Cement Flow
Dear Velan.
if your cement has good fluidisation you could unload approx 100- to 200 m/h from cement sometimes up to 250m/h through a outlett diameter 300. The normal flow rate by free falling will be approxly 100-150m The screw you descript will transport approxly 100 m/h. So it´s normally necessary that the screw is climbing up between 5-10 °. Otherwise the material can overflow the screw. Also it will be good if there is a flat gate between hopper and screw ( one Hand and one pneumatic or motoral flat gate if no unloading is avaible. With the flat gate ( handwheel) you can dosate the material. The fluidisation must work with impuls. So make the fluidisation approx 5 sec. blowing and than 10-15 sec. pause. For erection cement you only need a small part of air. Be carefull with to much air !!!
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Aerated Cement Flow
We have a hopper 2m dia x 2 m height with a conical bottom which is sloping at 30 degrees to the horizontal and which is fully aerated using polypropylene fabric + air.The hopper is filled with cement. The hopper outlet is 300mm dia and connects to a 500 mm dia horizontal screw conveyor running at 60 rpm. Can the experts tell us what rate of flow we can expect from the hopper to the screw? ■