The oxygen lances for electric arc furnace steelmaking can be divided into oxygen burning lance and blowing oxygen and burning carbon lance.

Based On the theory and practice of burner of power burning-furnace,this paper deals with fluidized- field distribution taws of six latest types of coal-burner guns in cool state, and points out that they possess the good heat performance including improvment in the mixture of coal with oxygen, stabiliztion in the firing and increase in the rate of combustibility.

In order to optimize glass furnace\'s burner structure,to improve quality and melting rate of glass and to prolong the life of oxy-fuel firing glass furnace,the three-dimensional mathematical model of a new oxy-fuel burner combustion space is set up in the paper.

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;

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.