A multiple shear mixing apparatus for forming or treating solid-liquid mixtures including a pump selected for handling the solid-liquid mixtures, a rigid shear filter, a jet nozzle, a vacuum chamber surrounding the jet nozzle and having at least one port for introducing materials, a venturi tube coupled with the jet nozzle, a storage tank for the mixture having an internal jet mixer therein, the above components being connected in series such that storage tank contents are pumped through the screen filter, through the jet nozzle, through the chamber and through the venturi tube back to the storage tank. A bleed is fed preferably from between the shear filter and nozzle to drive the internal jet mixer. After cycling through this series of components until uniformly blended, product is withdrawn between the shear filter and nozzle.