DOI: 10.52150/2522-9117-2018-32-176-181

Manachyn Ivan Oleksandrovych, PhD (Engin.), Senior Researcher, Iron and Steel Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: ovoch-isi@outlook. com, manachyn@gmail.com, ORCID 0000-0001-9795-6751

Shevchenko Anatoliy Pylypovych, Dr. Sci. (Engin.), Professor, Leading Researcher, Iron and Steel Institute named after Z.I. Nekrasovof the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; email: ovoch-isi@outlook.com, ORCID 0000-0003-0867-6825

Petrusha Victoria Petrovna, Lead Engineer, Iron and Steel Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: ovoch-isi@outlook.com

Rudenko Alexander Leonidovich, PhD (Engin.), Senior Researcher, Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: ovochisi@outlook. com

Calculative assessment of the quantity of rehabilitators for realization of the process of interaction of calcium oxide with ceronic sulfur

Abstract. The purpose of the work is to study the amount of reducing agents required for reactions of the interaction of calcium oxide with sulfur in the desulphurization of pig iron. The possible reactions of the interaction of calcium oxide with pig iron are given. Required amounts of reducing agents ([Si], Mg, Al) are calculated for providing interaction of calcium oxide with sulfur iron. It was shown that the cost of reducing agents is in the range of 0,044 – 1,004 kg / t of pig iron, depending on the change in the input and final content of sulfur in the pig iron and the type of reducing agent – the participant in the process of pig iron desulphurisation with calcium oxide. The dependence of their expenses on the type of recovery and sulfur content is obtained. The specific costs of reducing agents significantly increase with the increase in the
amount of sequestered sulfur, the dependence is linear. It is shown that magnesium monoindex is a logical and rational way of its application and does not require the use of a mixture of magnesium and lime. When using lime deuxulphurants, the most reasonable use of aluminum, which is also more technologically and cheap reagent for deoxidizing the melt. The diagrams and dependences of the cost of [Si], Mg and Al in the reaction of interaction of calcium oxide with sulfur dioxide on the amount of withdrawn sulfur [S] are given. Analysis of the calculated and actual results of off-stage pig iron desulphurization shows that the parameters of the resulting calculation chart are an integral part of the technological factors in the substantiation or evaluation of the process.
Keywords: desulphurization of cast iron, reductant, magnesium, aluminum, calcium oxide, flow diagrams

Reference
1. Shevchenko A.F. Vnepechnaya desul’furatsiya v kovshakh. Tekhnologiya. Issledovaniya. Analiz. Sovershenstvovaniye. Shevchenko A.F., Manachin I.A., Vergun A.S., Dvoskin B.V., Kislyakov V.G., Shevchenko S.A., Ostapenko A.V. Dnepr. Izd.Dnípro VAI2017. S. 253
2. Shevchenko A.F., Bol’shakov V.I., Bashmakov A.M. Tekhnologiya i oborudovaniye desul’furatsii chuguna magniyem v bol’shegruznykh kovshakh. – K. Naukova Dumka. 2011. 207 s