Steel vacuum treatment in the ladle with application of argon blow (VD process) allows performing almost all processes for steel refining such as degassing, deoxidation, desulphurization, removal of non-metallic inclusions per one treatment cycle. This technology is of great significance as it is the only process that can accomplish two tasks in one operation, namely degassing and desulphurization of steel. In such case due to intense interchange of matters “metal-slag”, the desulphurization is performed in parallel with actual vacuum treatment. The main advantage of this system comparatively with others is more compact design, low capital investment and low operating expenses during down time.