Direct reduction of ferrous oxide

Claim 1

IN APROCESS OF REDUCING IRON OXIDES BY DIRECT REDUCTION WITH REDUCING GASES, THE IMRPOVEMENT WHICH COMPRISES ESTABLICHING A BED OF FLUIDIZED FE AND FEO FINE PARTICLES AT AN FEO REDUCING TEMPERATURE, FLOWING INTO SAID BED COARSE HEAT CARRIER PARTICLES AT A TEMPERATURE HIGHER THAN THE REDUCING TEMPERATURE OF SAID BED THAT ARE SETTLED DISPERSED THROUGH SAID BED OF FINE PARTICLES INTO A TOP LEVEL INTERFACE WITH THE BASE OF SAID BED HAVING A TOP LEVEL INTERFACE WITH THE BASE OF SAID BED OF FLUDIZED FINE PARTICLES, FORMING IN SAID MOVING BED A REDUCING GAS WHICH FLOWS UPWARDLY THERETHROUGH UNIFORMLY DISTRIBUTED AND AT A VELOCITY BELOW THAT AT WHICH TURBULENCE IS CREATED IN THE TOP LAYER OF THE MOVING BED TO PREVENT ENTRAPMENT OF FINES IN THE MOVING BED, DISCHARGING CARRIER PARTICLES FREE OF FINES FROM A BOTTOM PART OF SAID MOVING BED TO MAINTAIN SAID LEVEL INTERFACE, AND INJECTING ADDITIONAL REDUCING GAS INTO A BOTTOM PART OF SAID FLUIDIZED FINES BED ABOVE SAID INTERFACE.