Method and device for introducing dust into a metal melt of a pyrometallurgical installation
View Patent ↗A device for introducing dust into a molten bath of a pyrometallurgical installation is provided. An electrodeless plasma torch includes an essentially tubular housing, wherein the housing allows a passage of a carrier gas containing dust particles, and wherein the housing is coaxially surrounded by an inductive load coil which forms a heating zone.
1. A device for blowing dust into a metal melt of a pyrometallurgical installation, comprising:
an electrodeless plasma torch with an essentially tubular housing,
wherein an injection tube protrudes centrally into the housing on an inlet side,
wherein the injection tube is coaxially surrounded by a gas delivery tube,
wherein the housing allows a passage of a carrier gas containing dust particles,
wherein the housing is coaxially surrounded by an inductive load coil which forms a heating zone,
wherein an inductive preheating zone is arranged upstream of the heating zone,
wherein the inductive preheating zone is formed by a preheating coil located within the gas delivery tube, coaxially surrounding the injection tube.
2. The device as claimed in claim 1 , wherein the injection tube extends to the heating zone.
3. The device as claimed in claim 1 , wherein an annular channel is provided between the injection tube and the gas delivery tube.
4. The device as claimed in claim 1 , wherein an annular channel is provided between the injection tube and the housing.