Steel / sponge and pellet plants Chemical plants / Brine clarifiers Waste water treatment plants etc. Our main product offeringis the High Rate Thickener (HRT) which has several special features that provide advantages over conventional thickeners. We can also offer Conventional thickeners, High compression thickeners and clarifiers. HiFlo High Rate Thickeners / Clarifiers. PHOENIX HiFlo High Rate Thickeners clarify wash plant effluent water while thickening the slurry to 40-45% solids, greatly reducing the underflow slurry rate to the slurry pond. PHOENIX Thickeners use sedimentation technology to maximize the water recovery rate, providing clarified overflow water that can be recycled and reused in the process.