GAS AND PARTICULATE DELIVERY SYSTEM AND METHOD FOR METALLURGICAL VESSEL

摘要

A method and an apparatus for charging a particulate, for example lime, with a carrier gas, for example oxygen, through a lance into a metallurgical vessel or furnace. The apparatus comprises a metallurgical lance having an inner barrel communicating with the tip of the lance and a lance header, an outer tube having one end in open communication with the inner particulate barrel at the header and a second end sealed on the outside of a particulate inlet tube. The particulate inlet tube extends a first portion coaxially within the outer tube, and a second portion extends outside the outer tube. The second portion includes a shut-off valve. An auxiliary gas tube is in communication with the outer tube upstream of the particulate inlet tube opening within the outer tube.