1. A ROTARY BROOM ASSEMBLY FOR MATERIAL HANDLING INCLUDING A SUPPORT FRAME STRUCTURE, AN IMPELLER ASSEMBLY ROTATABY MOUNTED IN SAID SUPPORT FRAME STRUCTURE, A SHROUD ATTACHED TO SAID SUPPORT FRAME STRUCTURE AND EXTENDING AT LEAST PARTIALLY AROUND THE PERIPHERY OF SAID IMPELLER ASSEMBLY, SAID IMPELLER ASSEMBLY INCLUDING AN IMPELLER SHAFT HAVING FLEXIBLE IMPELLER BLADES EXTENDING RADIALLY OUTWARDS THEREFROM, THE ANGLE BETWEEN SAID BLADES AND AXIS OF SAID IMPELLER SHAFT BEING ADJUSTED SUCH THAT ROTATION OF SAID IMPELLER ASSEMBLY WILL MOVE SAID MATERIAL SUBSTANTIALLY AXIALLY WITH RESPECT TO SAID IMPELLER ASSEMBLY AND DISCHARGE FROM SAID IMPELLER AT A SUBSTANTIAL VELOCITY, TURBINE MEANS POSITIONED AT THE DISCHARGE OF SAID IMPELLER ASSEMBLY TO INCREASE THE VELOCITY OF SAID DISCHARGE MATERIAL, THE SAID TURBINE MEANS INCLUDING A TURBINE SHAFT AND FLEXIBLE TURBINE BLADES EXTENDING RADIALLY OUTWARDS FROM SAID TURBINE SHAFT AND INCLUDING A TURBINE CASING AT LEAST PARTIALLY ENCLOSING SAID TURBINE BLADES AND HAVING A DISCHARGE OUTLET.