Off-domain desulfurization of cast iron: choice of rational technology and analytical and computational processing of desulfurization indicators
Received 07.06.2021, Revised 14.10.2021, Accepted 19.11.2021, Published 17.12.2021
Abstract
To find rational ways to reduce the sulfur content after off- domain desulfurization of cast iron to obtain low-sulfur steel. The goal in the work is solved by the following tasks: to analyze modern technologies of extradomain desulfurization with the use of various desulfurizer reagents; to determine the most rational technologies of off-domain desulfurization of cast iron, which allow to achieve the degree of desulfurization of cast iron up to 80–99% and sulfur content after desulfurization of cast iron up to 0.003%; on the basis of known experimental and calculated data to offer analytical and calculation processing of indicators of pig iron desulfurization. General (empirical, complex and theoretical) and special (graphic and correlation) methods of scientific knowledge were used in the work. Thus, a comprehensive approach was used in the generalization and analysis of scientific and technical literature on the analysis of modern experience in extradomain iron desulfurization technologies. Analytical and calculation processing of known experimental (actual) and calculated data of the dependence of magnesium content in cast iron on sulfur content after desulfurization of cast iron was performed by correlation-regression method in Excel (with estimation of the coefficient of determination). The interference of content in cast iron from sulfur content after pig iron desulfurization is shown when using granulated magnesium, passivated magnesium in pieces, magnesium flux cored wire, mixture of granulated magnesium and fluidized lime as desulfurizing reagent. Analytical and computational processing of known experimental (actual) and calculated data with estimation of the coefficient of determination has been further developed, which indicates the possibility of reducing the sulfur content after extradomain desulfurization of cast iron to 0.003%. The results of the search for rational ways to increase the degree of desulfurization of cast iron to obtain low-sulfur steel can be used in teaching special disciplines for first (bachelor) students in specialty 136 «Metallurgy» (eg, discipline «Physical and chemical processes of non-aggregate metal refining»). Technological aspects of application of modern technologies of off-blast iron desulfurization at metallurgical enterprises of Ukraine and abroad are analyzed.which allow to achieve values of the degree of desulfurization of cast iron in the range of 80–99% and sulfur content after desulfurization of cast iron to 0.003%.
Keywords:
pig iron desulfurization; low sulfur steel; desulfurizer reagent; degree of desulfurization; sulfur content
Vodennikova, О., Vodennikova, L., Skidin, І., Saitharieiev, L., & Golovkov, P.
(2021).
Off-domain desulfurization of cast iron: choice of rational technology and analytical and computational processing of desulfurization indicators.
Journal of Kryvyi Rih National University,
19(2),
57-64.
https://doi.org/10.31721/2306-5451-2021-1-53-57-64