The suction rate of solid particle was measured by using the simplest type of ejector feeder as shown in Fig. 1, 3 and 4. The relationship between the nozzle velocity of air (
uN) and the suction rate of solid (
W) was very complicate when the nozzle came into the bed of particle, as shown in Fig. 2. But relatively simple correlation between modified air velocity (
UN-
UNmin) and suction rate (
W) was tfound empirically as shown in Eq. 4 and Fig. 7., in he range of pure suction feeding.
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