Through applying ladle argon-blowing technology by two gas supply bricks,the ladle bottom blowing rate is increased,the dead band of ladle argon bottom blowing is reduced,the composition and temperature of the molten steel are made more uniformity,and then the inclusions in steel and the composition segregation are dererased.

The flow field in liquid Wood's metal with centric gas bottom-blowing was predicted by a mathematical model.

The critical value of liquid steel drawing slag is calculated out according to the relation between the bottom-blowing gas quantity of ladle and flowing speed on interface between molten steel and slag.

Realization of control programs of bottom blowing for No.1 converter in Baogang;

Reform of computer controlling system of converter bottom blowing;

The design and application of an automatic control system for the bottom blowing of a combined top-bottom blown converter;

In the present study,a water model of slag ladle was used with a photographic technique to determine the effect of viscosity and bottom stirring gas flow rate on surface spout characteristics of the solution.

Over all and free surface gas liquid volumetric mass transfer coefficient in water model which is 1∶7 scale of 30 t bottom stirring EAF is determined from the relations of pH value and CO 2 content.

Practice on bottom argon bubbling for 80t ladle with single permeable bricks;

Factors influencing the hit rate of ladle bottom argon bubbling are analyzed,including the anti-molten steel permeate function of the permeable brick,the anti-flag permeate function of the permeable brick,hot earthquake of the permeable brick,the tidying up and maintenance of the brick,the piping of the bottom blow,tapping operation,argon source pressure and the temperature drop of ladle.