Analysis and solution of the problem of slag sticking in converter oxygen lance

April 30, 2019

At present, the converter top-blown oxygen steel-making technology is widely promoted and applied in most domestic steel mills, and the oxygen blowing at the top accelerates the rhythm of steel-making. However, in the fast-paced converter smelting process, the phenomenon of oxygen gun sticking steel (sticky slag) often occurs.

Reasons for sticking steel to oxygen lance:

(1) During the blowing process, the slag is not well permeable, and the fluidity is poor, so the molten metal surface cannot be well covered.

(2) The gun position is too low, causing the slag to “dried back”. The metal splash is severe and adheres to the oxygen lance.

(3) The nozzle structure is unreasonable.

(4) The industrial oxygen pressure also has a certain influence on the sticky slag of oxygen lance.


Damage of sticking steel to oxygen lance:

(1) Oxygen gun slag causes local heat dissipation of the gun body, leads to gun burning and high replacement frequency of oxygen gun.

(2) It is very difficult to remove the steel slag mixture stuck on the oxygen lance, increasing the labor intensity of the workers.

(3) When the slag sticking (steel sticking) of the oxygen lance is serious, the gun body will become thicker, which may cause the failure of oxygen gun rising and falling, and affect normal production.

The new materials for converter oxygen lances developed by our company meets the European E0 standard. Environmental protection, no pollution and odorless. The promotion and application of this new product guarantees the efficiency of steel smelting and meets the needs of the development of the steel industry.

Characteristics of our company's new materials for converter oxygen lance:

(1) Green, environmental protection, no pollution, does not affect the quality of the steel itself.

(2) Reduce the thickness of the sticky slag, easy to clean, and reduce the labor intensity of workers.

(3) Increased the use rate of the oxygen lance, increased the converter production capacity, and reduced the production cost.

(4) Preventing the molten iron from splashing, causing melt leaking oxygen lance, effectively protecting the smoothness of the lance, thereby enhancing the safety of production.