THERMODYNAMIC MODELING OF AGGLOMERATION OF MANGANESECONTAINING RAW MATERIALS USING OIL AND BITUMINOUS ROCKS

In Kazakhstan, manganese is one of the most widely used alloying elements of steel, increasing its hardenability, hardness, tensile strength and yield strength. Manganese in ferromanganese and silicomanganese is a deoxidizer and alloying agent for steel and alloys. The development of ferroalloy production requires an increase in output up to 100 thousand tons per year to meet the needs of metallurgical plants within the state and beyond. Moreover, the main goal is to obtain manganese sinter for further redistribution, allowing to obtain better ferroalloys, including metallic manganese. Methods of chemical and physico-chemical analysis establish the characteristics and composition of manganese-containing raw materials and oil tar rocks. Derivatogram of manganese ore and a mixture for agglomeration using oil bituminous rock is characterized by two noticeable effects. The first exoeffect in the range of 500–520K is characteristic of the process of dehydration of manganese hydrates. The endoeffect in the region of 950-1010K indicates a significant absorption of heat during the decarbonization of manganese carbonates, as well as calcium carbonate compounds characteristic of the mineral part of the ore. Derivatives of a mixture of manganese ore with coke with a coke to oil bituminous rock ratio of 1:1, 1:2 are characterized by a two-stage exoeffect in the range of 280-320 and 480-520K, indicating the removal of crystalline hydrate in the first case of oil bituminous rock compounds.
Using the Astra software package, thermodynamic modeling of 2MnO₂ -C₂H₂-3O₂; 3Mn₂O₃-C₂H₆-3O2; Mn₃O₄-C₂H6-3O₂ systems was carried out, which is typical for the working compositions of agglomeration of manganese-containing raw materials in the presence of oil bituminous rocks.

1. Baysanov S.O., Tolymbekov M.ZH., Gabdullin S.T. Perspektivy razvitiya margantsevoy otrasli Kazakhstana // Sovremennyye problemy metallurgii// Sb.nauch.trudov. Dnepropetrovsk. Dnepr. «Sistemní tekhnologíí»,2001. –T.2.S.55-58.

2. Svyatov B.A., Tolymbekov M.ZH., Baysanov S.O. Stanovleniye i razvitiye margantsevoy otrasli Kazakhstana.-Almaty. «Iskander», 2002.–146s.

3. Buketov Ye.A., Gabdullin T.G., Takenov T.D. Metallurgicheskaya pererabotka margantsevykh rud Tsentral’nogo Kazakhstana. Alma-Ata: Nauka KazSSR, 1979. –184s.

4. Tleuova S.T., Kapsalyamov B.A., Shevko V.M., Tleuov A.S., Karakhodzhayev T.R. Izucheniye protsessa aglomeratsionnogo obzhiga marganetssoderzhashchego syr’ya s ispol’zovaniyem neftebituminoznykh porod. Tr.MNPK, «Auyezovskiye chteniya - 8» Shymkent, 2009g.

5. Gurevich L.V., Veyts I.V., Medvedev V.A. Termodinamicheskiye svoystva individual’nykh veshchestv.-M:Nauka,1982. –S.125-130.

6. Sinyarev G.B., Vatolin N.A. Primeneniye EVM dlya termodinamicheskikh raschetov metallurgicheskikh protsessov. –M.:Metullurgiya, 1982.–264s.