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Registration Number

0221U101001, 0119U102381 , R & D reports

Title

Minimization of destructive influence of alkali compounds on refractory lining of blast furnace in conditions of use of secondary resources

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Head

Tsyupa Natalia O., Кандидат технічних наук

Registration Date

12-01-2021

Organization

Iron and Steel Institute of Z.I.Nekrasov National Academy of Sciences of Ukraine

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 The topical problem of development of criteria of an estimation of alkaline capacity and ways of the directed formation of properties of alkali-containing slags of blast-furnace smelting for the purpose of the maximum removal of alkaline connections from the furnace, increase of efficiency of control of a slag mode and technical and economic indicators of smelting process is solved. Empirical equations for predicting the alkaline capacity of blast furnace slag have been developed, which allow estimating the sorption capacity of slag melt in relation to alkaline compounds and increase the efficiency of control actions in optimizing the slag regime of blast furnace smelting. The method of operative estimation of optimum alkaline capacity of blast furnace slag based on interrelation of alkaline capacity of blast furnace slag and alkaline loading is offered. Their ratio is recommended as a criterion that allows to control the accumulation of alkaline compounds in the blast furnace space and reasonably choose control effects for timely adjustment of the composition and mass ratio of charge components to obtain cast iron and slag optimal composition in specific charge and technological conditions. In order to quickly control the accumulation of alkaline compounds in the blast furnace as part of the control system and control of the slag mode of blast furnace "Slag" developed subsystem "Alkalis", which based on the assessment of alkaline capacity of blast furnace slag allows adjusting the composition of the charge, which provides a regulated ratio of alkaline capacity and alkaline load. Studies have shown that when smelting using the algorithm, the yield of cast iron increased by 793 tons, the consumption of coke decreased by 155 tons, the output of alkaline compounds from the furnace with slag increased by 77.12 tons.

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Snihura Iryna R.
Stepanenko Dmytro O.
Tsyupa Natalia O.

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2021-01-12