A study on the influence of the ratio of pig iron and metal scrap in the of electric melting charge on the technical and economic performances of the rail steel production

摘要

The article contains the results of the statistical study on the influence of the ratio of pig iron and metal scrap in the charge for the production of rail steel on the main technical and economic performances of the electric furnace shop. The regression curves obtained and substantiated from a technological point of view indicate a linear decrease in the specific consumption of electricity and an increase in the specific consumption of oxygen according to the parabolic law with an increase in the proportion of both hot and cold iron in the metal scrap. Also, a linear reduction in the manganese content at the tapping was observed with an increase in the proportion of pig iron in the metal charge. The dependence of the duration of melting on the ratio of the charge components in the metal scrap has a pronounced nonlinear character and indicates the presence of a pronounced minimum. The statistical model constructed on the basis of the dependencies obtained is an effective tool for optimizing the share of pig iron in the metal charge in the production of rail steel for a specific period of time, taking into account the level of prices for materials and energy carriers.