The slag ball is introduced in detail

The effective relative density of the slag ball is generally 4.2 ~ 4.5G/cm3. The appearance of the slag ball is spherical, and its management center generally uses raw materials such as cast iron block, cast iron pin pressing block, small scrap slab as the frame, and the external refractory mud is covered with refractory concrete, which can choose high aluminum refractory concrete and high aluminum vanadium earth refractory concrete or magnesium refractory mud. It only needs to meet the processing requirements of slag blocking, and should be simple in structure and cheap in cost.

Fully considering the problem of increasing corrosion of the steel outlet, the diameter of the slag ball should be slightly larger than the diameter of the steel outlet, so as to have the effect of slag blocking.

The slag ball is generally invested when the steel content reaches 1/2 ~ 2/3, and the slag blocking accuracy is high. The slag is too sticky, it is likely to harm the actual effect of the slag ball. The slag viscosity is large, and the appropriate investment in the slag ball in advance can improve the accuracy of the slag. Which is best to block the slag ball

Which is best to block the slag ball

2 pneumatic slag stopper

The basic principle of the pneumatic slag stopper is that when the steel is nearly finished, the mechanical equipment is used to plug the steel outlet with the slag stopper from the outside of the steel furnace, and the air is blown into the furnace for inspection to avoid the discharge of slag. This method has been used by Voestalpine and other factories in Europe, and has also been selected by Haempura No. 5 Plant and Shougang Group.

3 Slag cap

A cone type slag cap made of cold-rolled steel plate is blocked outside the steel outlet to block the primary slag when the steel is gradually drawn out. Wuhan Iron and Steel, Handan Iron and steel are used in this way.

Clay brick and aluminum magnesium raw materials are used in the lining of steel ladle in China before, because of the high pH and high reducibility of the final slag of steel furnace, the lining of steel ladle will be corroded, and the service life of steel ladle will be reduced. After the selection of slag stopper, the total amount of coal ash into the ladle is reduced, and low reducibility and low pH covering slag is added, which reduces the corrosion of coal ash to the ladle and improves the service life of the ladle.