Efficient performance of pulp lifters to discharge ground rock is critical to the effective performance of SAG and AG mills. The paper covers developments in the design of pulp lifters and associated grates, of both conventional straight-radial and curved types, and of the inner discharge cone. Issues covered include the discharge performance of both the slurry and rock components of the discharge, reverse flow back into the mill through open grates and backflow down the pulp lifters of material that fails to discharge from the mill. The design experience is interpreted in the light of developments in particle flow modelling of the flow of charge in pulp lifters._x000D_
FORMAL CITATION:Royston, D, 2004. Charge flow in pulp lifters, in Proceedings Metallurgical Plant Design and Operating Strategies 2004, pp 95-104 (The Australasian Institute of Mining and Metallurgy: Melbourne).