Development of industry led to a change in scale and quality stainless steel. These changes alter our perceptions and the extent of production of steel in general. Annual steel production of 710 – 750 million tons / year. Development of engineering and other steel consuming industries make to develop the industry of metallurgy. The development is to increase the purity of steel (due to secondary treatment). According to available data count on the continuing changes in the organization of steelmaking. These changes are related to the success of engineering solutions: Using the converter process technology; Creating a high- EAF; Development of methods for secondary metallurgy; The transition from pouring into molds, a continuous casting; Pre-treatment of hot metal and blowing a refined pig iron in a converter with small amount of slag.
This procedure can reduce material consumption, while increasing quality are steel with a minimum content of undesirable impurities. 15 – 20 years ago, calls for new branches of technology to quality of steel many brands has increased dramatically and continues to grow. This in turn led to what extent the production of steel and alloys containing a negligible amount of gases, nonmetallic inclusions and other undesirable impurities markedly increased. The possibility of obtaining steel with guaranteed low content of harmful impurities, respectively, with minimal development of liquation processes provides an opportunity to increase industrial production growth without increasing the number of steel. The main tasks before the metallurgists to date are: high quality, cleanliness and reliability of metal.