Axial flow, bi-rotor concrete reclaimer

Abstract From the Canadian patent

A concrete reclaimer having a pair of concentric mesh cylinders for separating wet concrete into its original components. The invention includes a hopper and feed screw for feeding wet concrete into the inner cylinder at a constant rate. The concrete is washed by a water spray as it passes through the cylinders. The inner cylinder is made from coarse mesh which allows sand and cement, but not gravel to pass, through. Gravel is deposited from the outlet end of the inner cylinder. The outer cylinder is made from fine mesh, allowing cement, but not sand to pass, through. Sand is deposited into the bottom of at least one dewatering screw, which allows water to drain as it elevates the sand. The …