METHOD AND APPARATUS FOR FLAME WORKING MINERAL BODIES

摘要

Flame cutting mineral bodies with an improved form of flame jet to produce spalling is employed to carry out a channelling operation wherein a vertical channel is cut in an exposed vertical face of granite in a quarry. Emission of a stream of products of combustion from a burner at superatmospheric pressure is controlled by means of a specially formed exit orifice in a flame jet nozzle to provide a jet flame which is distorted out of the normally conical shaped configuration so as to provide a fan shaped flame operative over a relatively extended area of impingement on a vertical face of stone with more efficient utilization of flame energy being realized in spalling.