Patent ID: 9103592
Filing Date: 2015-08-11
Classification: C21C,C22B,F27B,F27D,Y02P

Abstract:
1. A burner for a flash smelting furnace having a reaction shaft, comprising: a burner block that integrates with the roof of the furnace, the block having a nozzle opening therethrough to communicate with the reaction shaft of the furnace; a wind box to supply combustion gas to the reaction shaft through the nozzle opening at a controllable velocity, the wind box being mounted over the nozzle; an injector having a sleeve for delivering pulverous feed material to the furnace and having a central lance within the sleeve to supply compressed air for dispersing the pulverous feed material in the reaction shaft, the injector mounting within the wind box so as to extend through the nozzle opening in the block, defining therewith an annular channel through which combustion gas from the wind box is supplied into the reaction shaft, the annular channel having a cross-sectional area transverse to the axis of the injector and the nozzle opening; and an injector surrounding structure extending from the wind box through the nozzle opening in the block; wherein one of the surrounding structure and the injector is movable relative to the other by control means exterior of the wind box so as to adjust the cross-sectional area of the annular channel and thereby control a velocity of the combustion gas supplied into the reaction shaft.