Method of feeding green pellets onto grate of pretreatment...

Details Method of feeding green pellets onto grate of pretreatment... Method of feeding green pellets onto grate of pretreatment...

G - Physics

01

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39/34, 201/78

G01G 11/08 (2006.01) B65G 43/08 (2006.01) B65G 47/19 (2006.01) F27D 3/00 (2006.01) F27D 19/00 (2006.01)

Patent

CA 1051813

ABSTRACT OF THE DISCLOSURE In the production of reduced pellets such as, for example, re- duced iron pellets by the grate-kiln system for firing, a distributor and a belt conveyor provided with a weighing machine are arranged between a siev- ing machine that sieves produced green pellets to predetermined grain sizes and a travelling grate of a pretreatment furnace. The weight of green pellets fed from the sieving machine through the distributor onto the belt conveyor is continuously measured on the belt conveyor by means of the weighing machine, and a signal indicative of the measured value is fed back to the distributor. The distributor operates in response to the signal and regulates the supply of green pellets so that the supply of green pellets to the belt conveyor, and hence the supply of green pellets to the grate is kept substantially constant without changing the speed of the grate. As a result of the constant feeding of green pellets, the time during which the pellets undergo drying, preheating and hardening in the pretreatment furnace does not vary. This ensures stable operation for the production of pellets which are always stable in quality. The distributor itself is of such a construction as will not significantly crush green pellets, thereby enabling production of reduced pellets which are always regular in shape.

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