chemicals may have been added earlier in the process or while the sand was entering the chopper screw conveyer 103 or the crusher 106 in certain embodiments liquids and chemical additives may be added to the sand through injection ports 110 on eductor 109 after the sand exits a first portion of the diffuser the sand is drawn into a second portion of the diffuser which again changes the velocity of the flow creates additional turbulence and recirculation zones the flow then enters a second throat of the diffuser and exits through a conduit which also changes the velocity of the flow and creates additional turbulence and recirculation as the flow of sand and fluids exits eductor 109 all material including the chemical additives are mixed and effectively entrained in the mixture due to the design of the eductor 109 second hopper 107 provides a shear source that may provide a shear rate of about 6000 reciprocal seconds at a flow rate of about 800 gallons per minute gpm the second hopper 107 design also provides a vacuum to draw the sand into eductor 109 and promotes mixing of the sand liquids and chemical additives as the flow exits second hopper 107 the additional shear and mixing may thereby increase the dispersion of the chemicals throughout the sand and liquid enhancing separation and allowing for additional downstream separation to proceed more efficiently and or with greater ease depending on the requirements of the operation the flow rate of the sand fluid mixture may be adjusted to.