Chemical and Technological Thermally Activated Process Research of Roasting Pellets in Dense Bed of Conveyor Indurating Machine

Abstract:

The work focuses on an important scientific problem of modeling thermal processes of thermal technology, which are complicated with non-isothermal chemical reactions during the thermal preparation of raw materials in a dense layer. A mathematical model is presented for heat and mass transfer in a dense layer. The firing phosphate pellets parameters analysis calculated according to the model and performed on a kiln machinery in the scheduled mode was conducted. The features of the course of processes of drying, agglomeration and dissociation of carbonates in the pellets are revealed at their heat treatment. The received results, allow defining the temperature and gas dynamic condition of roasting the pellets for achievement of the required moisture content, necessary extent of dissociation of carbonates and the acceptable durability.

• Periodical: Solid State Phenomena (Volume 265)
• Pages: 925-930
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.265.925
• Online since: September 2017
• Authors: Vladimir I. Bobkov*, M.I. Dli, A.S. Fedulov
• Keywords: Chemical Engineering, Drying Process, Modeling, Sintering, Thermal Physics, Thermal Technology

References

[1] V.I. Bobkov, V.V. Borisov, M.I. Dli, V.P. Meshalkin, Modeling the calcination of phosphorite pellets in a dense bed, Theoretical Foundations of Chemical Engineering, 49(2) (2015) 176-182.

DOI: 10.1134/s0040579515020025

[2] V.I. Bobkov, V.V. Borisov, M.I. Dli, V.P. Meshalkin, Intensive technologies for drying a lump material in a dense bed, Theoretical Foundations of Chemical Engineering, 51(1) (2017) 70-75.

DOI: 10.1134/s0040579517010031

[3] V.I. Bobkov, V.V. Borisov, M.I. Dli, V.P. Meshalkin, Multicriterial optimization of the energy efficiency of the thermal preparation of raw materials, Theoretical Foundations of Chemical Engineering, 49(6) (2015) 842-846.

DOI: 10.1134/s0040579515060020

[4] P. Luis, B. van der Bruggen, Exergy analysis of energy-intensive production processes: advancing towardsa sustainable chemical industry, Journal of Chemical Technology and Biotechonology, 89(9) (2014) 1288-1303.

DOI: 10.1002/jctb.4422

[5] S. Elgharbi, K. Horchani-Naifer, M. Férid, Investigation of the structural and mineralogical changes of Tunisian phosphorite during calcinations, Journal of Thermal Analysis and Calorimetry, 119(1) (2015) 265-271.

DOI: 10.1007/s10973-014-4132-5

[6] V.P. Meshalkin, S.V. Panchenko, D.S. Panchenko, V.V. Men'shikov, A.S. Kazak Computer-aided simulation of heat- and mass-transfer processes in an ore-reduction electrothermal reactor, Theoretical Foundations of Chemical Engineering, 49(5) (2015).

DOI: 10.1134/s004057951505022x

[7] S.V. Panchenko, V.P. Meshalkin, M.I. Dli, V.V. Borisov, Computer-visual model of thermophysical processes in electrothermal reactor, Tsvetnye Metally, 4 (2015) 55-60.

DOI: 10.17580/tsm.2015.04.10

[8] L.L. Tovazhnyansky, P.O. Kapustenko, S.I. Bukhkalo, O.P. Arsenyeva, O. Yu. Perevertaylenko, V.P. Meshalkin, Energy efficiency of complex technologies of phosphogypsum conversion, Theoretical Foundations of Chemical Engineering, 47(3) (2013).

DOI: 10.1134/s0040579513030135

[9] Yu.A. Baikov, V.P. Meshalkin, Statistical thermodynamics of the two-phase transition region for one-component metallic melts, Inorganic Materials, 35(9) (1999) 899-901.

[10] P.D. Sarkissov, Yu.A. Baǐkov, V.P. Meshalkin, Order-disorder processes in crystals when crystallizing binary metallic melts, Doklady Physics, 48(6) (2003) 290-295.

DOI: 10.1134/1.1591316

[11] L. Montastruc, C. Azzaro-Pantel, B. Biscans, M. Cabassud, S. Domenech, A thermochemical approach for calcium phosphate precipitation modeling in a pellet reactor, Chemical Engineering Journal, 94(1) (2003) 41-50.

DOI: 10.1016/s1385-8947(03)00044-5

[12] A.A. Butkarev, A.P. Butkarev, P.A. Zhomiruk, V.V. Martynenko, N.V. Grinenko, Pellet heating on modernized OK-124 roasting mashine, Steel in Translation, 40(3) (2010) 239-242.

DOI: 10.3103/s0967091210030101

[13] A.A. Palant, Pelletizing of sulfide molybdenite concentrates, Russian metallurgy (Metally), 2 (2007) 109-111.

DOI: 10.1134/s0036029507020048

[14] X. -H. Fan, M. Gan, T. Jiang, L. -S. Yuan, X. -L. Chen, Influence of flux additives on iron ore oxidized pellets, Journal of Central South University of Technology (English Edition), 17(4) (2010) 732-737.

DOI: 10.1007/s11771-010-0548-7

[15] A.A. Butkarev, A.P. Butkarev, Reversible pellet-cooling system at roasting machines, Steel in Translation, 35(4) (2005) 1-3.

[16] X. -F. Yang, Mechanism of roasting and agglomeration on the pellets produced by blended iron ore fines of hematite and magnetite, Journal of Iron and Steel Research, 22(2) (2010) 6-8.

[17] D. Chen, D. -Q. Zhu, Y. Chen, Preparation of prereduced pellets by pyrite cinder containing nonferrous metals with high temperature chloridizing-reduction roasting technology, ISIJ International, 54(10) (2014) 2162-2168.

DOI: 10.2355/isijinternational.54.2162

[18] V.M. Abzalov, V.V. Bragin, V.I. Klein, S.N. Evstyugin, A.A. Solodukhin, Thermal systems of conveyer roasting machines, Steel in Translation, 40(9) (2010) 813-815.

DOI: 10.3103/s0967091210090081

[19] S.G. Melamud, B.P. Yur'ev, Oxidation of iron ore at moderate and high temperatures, Steel in Translation, 46(6) (2016) 384-389.

DOI: 10.3103/s0967091216060085

[20] B.P. Yur'ev, V.A. Gol'tsev, V.V. Lugovkin, V.F. Yarchuk, Hydraulic drag of dense beds consisting of different shape, Steel in Translation, 45(9) (2015) 662-668.

DOI: 10.3103/s096709121509017x

[21] V.P. Meshalkin, I.V. Soboleva, V.G. Dovi, Method and algorithm for bayesian estimation of kinetic parameters of chemical processes with fluctuating independent variables, Theoretical Foundations of Chemical Engineering, 43(6) (2009) 861-868.

DOI: 10.1134/s0040579509060037

[22] B.P. Yur'ev, V.A. Gol'tsev, Thermophysical properties of kachkanar titanomagnetite pellets, Steel in Translation, 46(5) (2016) 329-333.

DOI: 10.3103/s0967091216050168