Shumelchyk I. Increasing of blast furnace smelting efficiency based on the new criteria and methods for the thermal management

Blast furnace smelting. The development of criteria and new control methods based on them, for prediction and thermal management of blast furnace smelting for its stabilization and to provide the required quality of pig-iron while minimizing energy consumption. Modern research methods, as well as mathematical modeling, experimental research and industrial tests of the developed technical solutions. Based on the dependencies of parameters characterizing the distribution of the burden and the gas flow at the top of the furnace with silicon content in the pig-iron during the production, there have been developed a new criterion for assessing the thermal state of blast furnace smelting. Based on the established with the help of proposed exponent of balancing exponent of burden by gas for the conditions of the dry zone the behavior characteristics of the burden materials surface, that have been caused by the burden rising violations, there have been improved the method of burden lowering speeds calculation, based on the information of a stationary system of burden surface measurement on the top of the BF. For the first time there have been offered a method for a rapid evaluation of the thickness of the slag lining hearth whilst periods of BF blowing-in after its emergency stopping. For the first time there have been developed criteria of axial coke air-funnel, which is the ratio of the height of layers of coke in the central and central-intermediate zones of the BF top and set ranges of its change, that allow to substantiate the unloading of the additional coke in different zones of the furnace. The practical value is made by: a criteria for assessing the thermal state of blast furnace smelting, method of downloading the portions of additional coke based on the criteria of efficiency axial coke air-funnel, improved way of predicting the silicon content in pig-iron, improving the functionality of the control system residual thickness of the lining of the furnace based on the rapid evaluation of the thickness of the slag lining hearth, software implementation of the developed algorithms of the system "BURNING" for various design features of the lining and cooling system at the 7 Ukraine blast furnaces. The expected economic effect from the using of automation control system in the method of predicting of the silicon content in the pig-iron amounts to 2.9 mln UAH, the share part of the applicant - is 1.2 mln UAH. Metallurgy.