FLSmidth’s new Reflux Flotation Cell (RFC) is an innovative flotation system that is proving to transform the hydrodynamics of traditional flotation. This novel flotation system has proven to reduce the flotation volume required by an order of magnitude when compared to traditional systems. Enhanced kinetics are achieved by increasing operating bubble surface area flux by as much as ten times more than is possible with existing technologies. The cell operates to maximise recovery while producing a high-grade flotation product. This is achieved by operating an effective sparging system, promoting bubble-particle attachment by producing optimum bubble sizes at high shear rates. The addition of wash water allows for grade control/rejection of slimes and ensures positive bias flow in the separator to maximise separation efficiency. FLSmidth has tested this technology on a pilot scale at a Queensland copper mine. A continuous sample in the form of slipstream from the feed to the existing rougher flotation circuit was tested. This paper aims to detail the testing campaign and relay the results achieved, comparing the RFC’s performance to that of the existing plant rougherscavenger flotation circuit. Copper recoveries and grades equivalent to that of the production circuit were readily achieved at retention times in the order of 10–15 per cent of the production circuit requirements. Direct comparison to plant performance as well as conventional laboratory flotation kinetic tests will be discussed along with the impact of these results and implementation of this technology on copper rougher flotation circuit design.