Off-domain desulfurization of cast iron: theoretical foundations, modern technologies and analytical and computational processing of desulfurization indicators
Received 25.05.2021, Revised 09.10.2021, Accepted 19.11.2021, Published 17.12.2021
Abstract
The aim of the work is to analyze the experience of modern technologies of off-domain desulfurization of cast iron and on their basis analytical and calculation processing of known experimental and calculated data of indicators of pig iron desulfurization. The set goal in the work is solved by the following tasks: to determine the most technically and cost-effective desulfurizer reagent for off-domain desulfurization of cast iron; to analyze modern methods of off-domain desulfurization of cast iron; on the basis of known experimental and calculated data to offer analytical and calculation processing of indicators of desulfurization of pig-iron. A comprehensive approach was used in the generalization and analysis of scientific and technical literature in the direction of modern review of Ukrainian and foreign experience of off-domain desulfurization of cast iron. Analytical and calculation processing of known experimental and calculated data of the dependence of the degree of use of magnesium on the desulfurization of cast iron on the concentration of sulfur in the metal when used as a reagent-desulfurizer granular magnesium brand MGP-99 according to TU 1714-004-43055164-2004 and a mixture of granular magnesium and fluidized lime and according to TU U 26.5-00193714-042-2001 it was carried out by correlation-regression method in Excel (with an estimate of the coefficient of determination). The dependence of the degree of use of magnesium on the desulfurization of cast iron, done on the example of naturally alloyed and processed cast iron, on the concentration of sulfur in the metal when used as a reagent-desulfurizer granular magnesium and a mixture of granular magnesium and fluidized lime. Analytical and computational processing of known experimental and computational data with estimation of the coefficient of determination, which shows the possibility of increasing the degree of use of magnesium for the desulfurization of cast iron to 90%, has been further developed. The results of the theoretical analysis of the effectiveness of modern technologies of off-domain desulfurization of cast iron can be used in the teaching of special disciplines for applicants for the first (bachelor's) level of higher education in the specialty 136 «Metallurgy». The possibilities of Ukrainian and foreign metallurgical enterprises to achieve the degree of pig iron desulfurization in the range of 50–99 % and sulfur content after desulfurization up to 0.005 % when using different reagent desulfurizers for off-domain iron desulfurization are shown.
Keywords:
pig- iron desulfurization; desulfurizer reagent; degree of desulfurization; degree of use of magnesium for desulfurization
Vodennikova, О., Vodennikova, L., Baboshko, D., & Golovkov, P.
(2021).
Off-domain desulfurization of cast iron: theoretical foundations, modern technologies and analytical and computational processing of desulfurization indicators.
Journal of Kryvyi Rih National University,
19(2),
28-35.
https://doi.org/10.31721/2306-5451-2021-1-53-28-35