Slit lance burner for flash smelter

摘要

A burner for a flash smelting furnace. The burner includes 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 of the furnace. The central lance has an annular slot at its tip for creating a substantially continuous air curtain.

主权项

1. A burner for a flash smelting furnace, comprising:
a burner block that integrates with a roof of the flash smelting furnace, the burner block having a nozzle opening therethrough to communicate with a reaction shaft of the flash smelting furnace; a wind box to supply combustion gas to the reaction shaft through the nozzle opening, the wind box being mounted over the nozzle; an injector having a sleeve for delivering pulverous feed material to the flash smelting 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 burner block, defining therewith an annular channel through which combustion gas from the wind box is supplied into the reaction shaft; wherein the central lance comprises an annular slot defined in a tip structure of the central lance for creating a substantially continuous encircling air curtain about the central lance tip structure.