The region between the pulp and the froth also known as pulp/froth interface in mineral flotation processes separates the pulp from 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-particle 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.

纸浆和泡沫之间的区域在矿物浮选工艺中也称为纸浆/泡沫界面，将纸浆与泡沫分离。各种研究人员认为，该区域周围会发生颗粒分离，从而严重影响矿物的回收率和品位。指出的原因之一是与界面碰撞时气泡颗粒聚集体的突然减速，而另一种理论则认为是由于气泡聚结引起的分离。意见分歧的可能原因可能是所采用的调查方法不同。尽管有许多研究人员指出发生了分离，但是动能的变化或气泡的聚结或两者的结合是否对分离负责（如果有的话）并不确定。从而，这篇综述检查并提出了关于纸浆-泡沫界面在颗粒分离和选择性上的作用的工作。该综述还考虑了文献中发现的具有各种界面的气泡的行为，以推断界面剥离的主要原因。