Patent EA-000183-B1 (EA)
Title: Nozzle with a welded lance head for melt agitation by blowing
IPC: B23K15/00
Filed: 1996-06-24
Abstract: 1. Nozzle with a welded lance head (1) for pointing at a metallurgical melt bath or a chemical reaction vessel and comprising a front surface (40) and an assembly of at least two substantially concentric tubes (20, 30), wherein said front surface (40) being made of electrolytic copper characterized in that the front surface (40) is joined (52) to said tubes (20, 30) by high energy welding, which is electronic ray welding, the head is made of a number of head elements (15, 30, 31, 32, 33), each of which consists of a material specifically selected of different metals for the respective head element and all said head elements are joined in zones (52, 53, 54) of their connection by high energy connection 2. Nozzle with a welded lance head (1) for pointing at a metallurgical melt bath or a chemical reaction vessel and comprising a front surface (40) and an assembly of at least two substantially concentric tubes (20, 30), wherein said front surface (40) being made of electrolytic copper characterized in that connection (52) of said front surface (40) with said tubes (20, 30) is made by high energy welding which is laser welding and said is made of a number of head elements (15, 30, 31, 32, 33), each of which consists of a material specifically selected of different metals for the respective head element and all said head elements are joined in zones (52, 53, 54) of their connection by high energy connection 3. Nozzle according to Claims 1 or 2 characterized in that said lance head (1) comprises at least one connection copper-steel. 4. Nozzle, in particular oxygen, according to any of preceding Claims in which said lance head (1) in particular oxygen comprises an outlet nozzle (14) ending with an outlet orifice (16) characterized in that the end section (15) of said outlet nozzle is made of material having high wear resistance and abrasive durability. 5. Nozzle according to the preceding Claim characterized in that said nozzle is made of the said material. 6. Nozzle according to the preceding Claim characterized in that said material is a wear resistant at high temperatures. 7. Nozzle according to Claim 6 characterized in that said lance head is made of the sa9d material 8. Nozzle according to one of Claims 6 or 7 characterized in that the said material is an alloy based on nickel. 9. Nozzle according to any of preceding Claims 6-8 characterized in that said material is wear resistant bronze. 10. Nozzle according to any of preceding Claims 4-9 characterized in that a number of said outlet orifices (16) is at least 3. 11. Nozzle according to the preceding Claim characterized in that said outlet orifices (16) are arranged crown-like said crown is centred towards longitudinal axis (I) of said lance head (1). 12. Nozzle according to any of preceding Claims 4-9 characterized in that said outlet orifice has an annular shape, arranged around said longitudinal axis (I) of a nozzle-blowing device. 13. Nozzle according to any of preceding Claims 4-8 characterized in that each outlet nozzle (14) is oriented with divergence (α) towards the longitudinal axis (I) of the nozzle. 14. Nozzle according to any of the preceding Claims characterized in that deflector (60) is arranged on said lance head (1) almost by its centre so as to provide the regulation of outgoing turbulent flows (H). 15. Nozzle according to Claim 14 characterized in that said deflector (60) forms concave zones (63) on the outside surface of said lance head and being adapted to the velocity of the blowing outgoing flow. 16. Nozzle according to any of the preceding Claims 14 or 15 characterized in that said deflector (60) forms a protruding zone (61) inside said lance head. 17. Nozzle according to any of the preceding Claims 14-16 characterized in that said deflector (60) is made of the same material as said outlet nozzles (14). 18. Nozzle according to any of the preceding Claims characterized in that said front surface (40) is made of electrolytic copper or of material based on copper.