Technological principles of the production of clean cold-resistant steels from pig iron with low contents of manganese and silicon

The effects of several technological parameters on the degree of sulfur removal in oxygen converters and the success in attaining the desired final sulfur content in steel were discussed. A technology was developed for making steel in converters from desulfurized low-silicon, low-manganese pig iron. The technology involves repeated (3-5 times) use of the final slag in converter steel-making (cyclic slag formation) with a partial addition of fresh lime. The results show that the technology for obtaining a standard semifinished product significantly increases the efficiency of the processes used in the ladle metallurgy and makes it possible to obtain quality steel of any composition, regardless of its complexity.