Patent ID: 9657939
Date: 2017-05-23
CPC Classifications: F23D,F27D

Claim:
1. A burner for use on a flash smelting furnace having a roof and a reaction shaft, the burner comprising: a burner structure that integrates with the roof of the furnace, having a nozzle that defines an opening therethrough to communicate with the reaction shaft of the furnace; a gas supply channel to supply reaction gas to the reaction shaft through the nozzle; a feed supply for delivering pulverous material; an injector having a sleeve for delivering the pulverous material into the furnace, the injector extending through the nozzle, defining therewith an annular channel through which the reaction gas flows into the reaction shaft, with the reaction gas flow having at least one boundary layer within the annular channel; a fluidic control system having at least one port to direct a stream of fluidic control regulating fluid at an angle to the direction of flow of the reaction gas through the annular channel; wherein the stream of fluidic control regulating fluid is used to manipulate the at least one boundary layer and thereby adjust the cross-sectional area of the reaction gas flow within the annular channel so as to alter the exit velocity of the reaction gas flow into the reaction shaft.