The role of the pulp-froth interface on particle detachment and selectivity

The region between the pulp and the froth also known as pulp/froth interface in mineral flotation processes separates the pulp horn the froth. Various researchers suggest particle detachment occurs around this region significantly affecting mineral recovery and grade. One of the causes pointed out is sudden deceleration of bubble-partide aggregate upon collision with the interface while another theory suggests detachment to be caused by bubble coalescence. A possible cause of divergence in views may be in the different methods of investigation employed. Though, more than several researchers indicate that detachment occurs, it is not conclusive whether kinetic energy changes or bubble coalesce or a combination of the two is responsible for detachment if any. Thus, this review examines and presents work that has been done on the role of the pulp-froth interface on particle detachment and selectivity. The review also considers the behaviour of a bubble with various interface as found in literature with a view of inferring the dominant cause of detachment at the interface. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

The region between the pulp and the froth, known as the pulp/froth interface, plays a crucial role in mineral flotation processes, affecting particle detachment and recovery rate. Despite differing opinions among researchers on the detachment mechanism, a conclusive conclusion has not been reached, requiring further investigation.