NOZZLE FOR INJECTING GAS CONTAINING OXYGEN INTO A PIG IRON DEVICE HAVING AN INJECTOR INSERTION PIPE

摘要

The invention relates to a nozzle (4) for injecting gas containing oxygen into a pig iron production device, wherein an injector insertion pipe (5) made of refractory material is arranged in the gas channel of the nozzle, wherein an intermediate space (7) surrounding the injector insertion pipe is present between the wall of the gas channel and the outer wall of the injector insertion pipe (5) over the entire length of the injector insertion pipe (5). The injector insertion pipe (5) extends at least to the end face (11) of the nozzle containing the outlet of the gas channel. The space enclosed by the injector insertion pipe (5) is connected to an incoming line for gas (6) containing oxygen, and the intermediate space (7) between the wall of the gas channel and the outer wall of the injector insertion pipe (5) is connected to the feed line for protective gas (8) or to a feed line for gas containing oxygen. The invention further relates to the injector insertion pipe (5) and to a method for injecting gas containing oxygen from a nozzle (4) according to the invention, wherein gas containing oxygen is introduced into a space enclosed by the inner wall of the injector insertion pipe, and the gas containing oxygen enters the pig iron production device at an oxygen gas inlet speed after flowing through the injector insertion pipe, and at the same time a gas flows through an intermediate space (7) present between the outer wall of the injector insertion pipe and the wall of the gas channel, wherein said gas flows out into the pig iron production device at a gas outlet speed after flowing through the intermediate space (7), wherein the oxygen gas inlet speed is greater than the gas outlet speed.