Birtley contraflow separator

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A pneumatic table for dry cleaning coal. It consists of perforated deck plates arranged in a series of lateral steps with a longitudinal inclination. A centrifugal fan provides a constant upward blast of air through the deck. The usual layering takes place, the refuse sinking to the deck plates. The capacity of the table ranges from 6 st/h per foot (17.8 t/h/m) of width for sizes 1-1/2 to 2 in (3.8 to 5.1 cm), down to 2 st/h/ft (5.9 t/h/m) for fines below 1/16 in. They are built in any width up to a maximum of about 8 ft (2.4 m). Nelson

Source: Dictionary of Mining, Mineral, and Related Terms


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