OVERFLOW LAUNDER

摘要

An overflow launder for a separation cell where particles are fluidised and rise to the top of the cell, has a primary trough (1) surrounding the rim of the cell (2), and an array of secondary troughs (4) extending across the flu id surface from the side (5) of the rim to the opposite side (6). Fluidised particles can report directly to the secondary troughs (4) without travellin g across the surface of the cell, reducing the incidence of fallback. Alternative configurations with radial secondary troughs and external and/or internal primary troughs are also described.