Gas injection device
A gas injection device for introducing a process gas into a non-ferrous metal melt and/or slag, in particular a copper melt and/or copper slag, including a hollow-cylindrical lance which is formed from a refractory material and/or graphite, preferably includes a refractory material and/or graphite. The lance has an inlet opening for the process gas and a gas injection module connected to the hollow-cylindrical lance and formed from a refractory material and/or graphite, preferably including a refractory material and/or graphite, with at least one outlet opening for the process gas. The outlet opening includes at least one through-flow element formed from a ceramic material via which the process gas can be introduced into the melt.
1 . A gas injection device for introducing a process gas into a copper melt and/or copper slag, comprising:
a hollow-cylindrical lance which includes a refractory material and/or graphite, wherein the hollow-cylindrical lance has an inlet opening for the process gas and a gas injection module connected to the hollow-cylindrical lance and including a refractory material and/or graphite, with at least one outlet opening for the process gas, wherein the at least one outlet opening has at least one through-flow element formed from a ceramic material via which the process gas can be introduced into the melt;
the gas injection module is in a form of an impeller wheel and the at least one outlet opening is arranged centrally in the impeller wheel,
the through-flow element formed from the ceramic material is in a form of a sleeve that is closed on one side and is inserted into the at least one outlet opening and is firmly connected to the impeller wheel, and
the sleeve has at least one outlet channel arranged perpendicular to its longitudinal axis.
2 . The gas injection device according to claim 1 , wherein the ceramic material is selected from a group comprising silicon carbides, silicon nitrides, silicon aluminum oxide nitrides, boron nitrides, zirconium oxides, titanium oxides, aluminum titanates and/or mixtures thereof.
3 . The gas injection device according to claim 1 , wherein the hollow-cylindrical lance is formed from at least one individual hollow-cylindrical lance body that can be connected to other individual hollow-cylindrical lance bodies.
4 . The gas injection device according to claim 1 , wherein the gas injection module is formed in a cup-shape and the at least one outlet opening is arranged in a lateral surface of the gas injection module formed in a cup-shape.
5 . The gas injection device according to claim 4 , wherein the through-flow element formed from the ceramic material is in a form of a nozzle which is inserted into the at least one outlet opening and is firmly connected to the gas injection module.
6 . The gas injection device according to claim 5 , wherein the nozzle is arranged in the at least one outlet opening such that its longitudinal axis has an angle of 45° to 90° with regard to the longitudinal axis of the lance.
7 . The gas injection device according to claim 5 , wherein the nozzle is formed as a Laval nozzle.
8 . The gas injection device according to claim 1 , wherein the gas injection module is formed in the form of a shower head and has several outlet openings aligned in the direction of the inlet opening.
9 . The gas injection device according to claim 8 , wherein the through-flow element formed from the ceramic material is in a form of a perforated plate or a porous plate which is inserted into the respective outlet openings of the shower head and is firmly connected to it.
10 . The gas injection device according to claim 8 , wherein the outlet openings are arranged such that their longitudinal axis has an angle of 0° to 45° with regard to the longitudinal axis of the lance.
11 . The gas injection device according to claim 1 , wherein the sleeve is a cylindrical sleeve.
12 . A plant for the extraction of copper metals, comprising a gas injection device according to claim 1 .
13 . A plant for treating, cleaning and/or refining of copper slags, comprising a gas injection device according to claim 1 .