C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
110/18, 249/2, 3
C21B 7/00 (2006.01) B65G 53/66 (2006.01) C21B 5/00 (2006.01)
Patent
CA 1213729
"Apparatus and method for feeding pulverized coal into an air line to a blast furnace" ABSTRACT OF THE DISCLOSURE Pulverised coal feed tanks are emptied in sequence via a transport line into the hot blast of a blast furnace. Each tank is carried by three load cells whose outputs are summed and differentiated to obtain the actual feed rate. Gas pressure in the tank is controlled in dependence on the actual feed rate so as to achieve a desired feed rate. To reduce the possibility of inaccurate feeding of coal, the outputs of the respective load cells are compared, and if deviation from a predetermined weight distribution over the load cells is detected, feed from the tank is stopped. The load cells may be duplicated in series, and the summed outputs of the two sets of load cells compared to detect malfunctioning of a load cell, again resulting in cessation of feeding from that tank.
444569
Brandenburg Jan H.
Cornelissen Johannes J.m.
Hoogovens Groep Bv
Ridout & Maybee Llp
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