Optimization of oxygen lance nozzle for BOF;

Application of warm-hot extrusion technique in formation of oxygen lance nozzle;

Brazing structure and microstructure of brazed seam analyses of oxygen lance nozzle with Ag-based alloy in-furnace brazing;

Using the technology of high frequency induction brazing,under the different temperature of brazing and heat treatment,the sample of carbide gundrill tip was manufactured.

Design of Special CNC Milling Machine for Steelmaking Lance-tip;

Compared with original cast 4-hole lance-tip, it improves slagging, reduces splashlug,largely raises the durability and anti-deformation and increases the average lance-tiplife up to 830 heats.

The large heat loading in converter leads to the easily distortion of oxygen hole in lance tip,which has influence on the efficiency of steel-making and the life-span of oxygen lance tip.

The principle that the lance must guarantee the steelmaking first,then it can also be used for slag splashing has been followed in dual lance designing After deep theoretical study and investigation in site,the lance nozzle has been designed,which can be applied to small size converters The parameters of the lance nozzle are as follows:the dip is 11°,the nozzle divergence is 1

The trial usage of φ 168mm lance nozzle that is localized to make shows us that the service life is as long as that of imported one.