Coarse mineral particles with sizes of up to 200 mm can be pumped energy-effectively together with sands (<1 mm) under nearly pseudohomogeneous conditions at volumetric solids concentrations of up to 40%. Recent experimental results indicate that particles with sizer of 0.1-0.5 mm play an important role in reducing pipe wall friction. Experimental results in pipelines with diameters of up to 0.44 m have here been used in a brief demonstration of industrial applications : integrated systems for waste rock transportation together with fine grained tailings, coarse mineral particle pumping from open-pit mines or to disposal areas with dry deposition and recirculation of water and fine particles. Experiments with a crushed rock product (20-38 mm) pumped at a volumetric concentration of 13% showed that the friction losses were reduced considerably by particle degradation during the circulation in the pipeline loop. Circulatory effects must therefore be carefully considered when using coarse-particle loop results in the design of industrial once-through systems.