Converter steelmaking furnace slag spitting inhibitors

Converter steelmaking furnace slag spitting inhibitors  

The converter LianZha steel appear the cause of the spillage

 Spitting in converter steelmaking process is very common, and in the ladle furnace of the density of around 7.0 t/m3, the density of blast furnace slag is about 3.2 t/m3, slag cover YuGangShui above, below 1470 ℃ in carbon oxygen reaction inhibition, and in 1470 ℃ above can be carried out smoothly, if improper operation, (such as the second batch of slag added material isn't properly, etc) will make slag temperature gather to 1470 ℃ below, caused by oxygen slag (FeO) enrichment, and then with the temperature to 1470 ℃ above, carbon oxygen reacting, instantaneous produce the large amount of CO gas, slag serious turning into a bubble-and because CO gas discharge too late, and cause explosive spray.

Reduce spillage measures

In order to control carbon oxygen furnace reaction rate, reduce slag spitting, at present the solutions are: one is through the change of oxygen supply in the system and establish position, but with this method after general relief response, belongs to the remedial measures, the effect is not ideal; Two timely change slag composition, appeared in the first appear before signs spillage or add spillage slag foaming inhibitors, and immediately and slag rapid response, increase the slag viscosity, reduce slag foaming (FeO) content, slow C-O reaction, make the metal droplet slag foaming settlement, can restrain the spitting happens. Comprehensive consideration, decided to adopt the slag foaming inhibitors to reduce spillage happens. According to the process of converting process of slag CaO content of stator slag viscosity and the influence of the melting point, it is known that CaO content slag viscosity rise increased influence, so design should be added with a certain volume inhibitors composition of CaO, add the flammable volatile substances, help to eliminate the CO bubbles trapped in the blast furnace slag.