Mineral working burner apparatus

Claim 1

A FUEL INJECTOR DEVICE FOR A MINERAL WORKING BURNER WHICH COMPRISES: AN ELONGATED BODY HAVING A REAR END PORTION FOR CONNECTION TO A SOURCE OF FUEL AND A FRONT END PORTION FOR INSERTION INTO THE COMBUSTION CHAMBER OF THE BURNER, SAID FRONT END HAVING AN INVERTED FRUSTRO-CONICAL SHAPE, SAID BODY HAVING AN AXIAL LONGITUDINAL BORE THEREIN EXTENDING FROM SAID REAR END PORTION TO A POINT JUST SHORT OF THE FORWARD FACE OF SAID FRONT END; A PLURALITY OF SPACED DRILLINGS EXTENDING REARWARDLY FROM THE FRONT END PORTION OF SAID AXIAL LONGITUDINAL BORE TO A PLURALITY OF DISCHARGE PORTS ON THE PERIPHERY OF SAID BODY, SAID DIS CHARGE PORTS BEING LOCATED IN ALIGNMENT WITH LONGITUDINAL GROOVES ON THE EXTERNAL SURFACE OF SAID BODY WITHIN WHICH STREAMS OF OXIDANT MAY PASS TO MIX WITH THE FUEL DISCHARGED FROM SAID PORTS WHEREBY THE FUEL WILL BE PREHEATED PRIOR TO ITS MIXING WITH OXIDANT AND WHEREBY THE RESULTING FUEL-OXIDANT MIXTURE FORMED WILL BE GUIDED IN A SMOOTHLY CONVERGING CONICAL PATTERN WITHIN THE BURNER COMBUSTION CHAMBER BY THE EXTERNAL FRONT END SURFACE OF SAID BODY.