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FIG. 5.23.5 Dust pickup for drum filling. (Reprinted, with permission, from Opila, 1993.)

45 in minimum slope

45 in minimum slope

FIG. 5.23.8 Slot type hood mounted on a ribbon mixer. (Reprinted, with permission, from Opila, 1993.)

12 in minimum

Side baffles

6 in freeboard

FIG. 5.23.8 Slot type hood mounted on a ribbon mixer. (Reprinted, with permission, from Opila, 1993.)

35"

FIG. 5.23.5 Dust pickup for drum filling. (Reprinted, with permission, from Opila, 1993.)

A slot-type hood used with a ribbon mixer (see Figure 5.23.8)

Maintaining the conveying velocity throughout the collection system is important. If conveying velocities are too low, saltation (deposition of particles within a duct) occurs until the duct is reduced to a point where conveying velocity is obtained. This material buildup can be trou

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