Evaluating Optimal Operational Solutions For Heavy Intermediate Cyclone And Flotation Circuits Of Mamradco-Tabas Coal Washing Plant

Ahmadi, Rahman; Alidokht, Mehdi; Jannesar Malakooti, Sajjad; Zare, Saeed

doi:10.22034/ijme.2025.2039035.2017

Evaluating Optimal Operational Solutions For Heavy Intermediate Cyclone And Flotation Circuits Of Mamradco-Tabas Coal Washing Plant

Document Type : research - paper

Authors

Rahman Ahmadi ¹

Mehdi Alidokht ²

Sajjad Jannesar Malakooti ³

Saeed Zare ⁴

¹ Associate Professor, Technical and Engineering Faculty, Department of Mining Engineering - Mineral Processing, Imam Khomeini International University (RA), Qazvin

² Supervisor of the processing control department of Tabas Parvadeh coal Preparation plant

³ Tabas Coal Mining Complex, Iran Mines and Mineral Industries Development and Modernization Organization (IMIDRO)

⁴ Master of Mineral Processing, Faculty of Mining Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

10.22034/ijme.2025.2039035.2017

Abstract

In this article, the efficiency of the gravity circuits of the heavy intermediate cyclone and the flotation of the current coal-washing circuit of the Tabas Mamradco plant have been investigated, along with providing operational and corrective suggestions. In this regard, sampling of the 11 main streams of the factory, during three working days, and the performance of heavy intermediate cyclone circuits and flotation (rafter and cleaner) in different dimensional ranges, respectively, by performing analyses of release, sinking, and flotation on the representative feed sample. And its comparison with the actual condition of the device was monitored. Due to the wide dimensional range (0.5-0.5 mm) of the flotation feed and the presence of clay, the efficiency of flotation is low in dimensions below 75 microns, and the recovery and separation efficiency of this part of the particles is 30 and 23.8 percent, respectively. In addition, based on the results of sinking and flotation of different dimensional ranges of heavy intermediate cyclone products, the low Ep value of particles in the dimensional range of 0.5-1 and 0.5 mm, which are 0.17 and 0.21 respectively, shows The poor performance of the cyclone is the heavy intermediary in the separation of particles below 1 mm from the incoming feed. Based on the obtained results, limiting the dimensions of the flotation inlet to -150 microns makes it possible to increase the efficiency from 36 to 59%. On the other hand, gravity processes have a better performance than flotation in large dimensional ranges (0.15+ -0.7 mm) due to the simplicity of the operation and the low separation error, with a 7% increase in efficiency in these dimensions with the gravity method. Compared to flotation can be achieved. Therefore, using equipment such as a spiral to enrich particles of +0.15-1 mm will lead to a 3% increase in the efficiency of the factory.

Keywords

Mamradko coal washing

heavy media cyclone

flotation

fine particles

Subjects

Mineral Processing

M. Ito, Recent developments in advanced coal cleaning, J. MMIJ 124 (2) (2008) 865–870, https://doi.org/10.2473/JOURNALOFMMIJ.124.865. ##

D. Dou, J. Yang, J. Liu, H. Zhang, A novel distribution rate predicting method of dense medium cyclone in the Taixi coal preparation plant, Int. J. Miner.Process. 142 (2015) 51–55, https://doi.org/10.1016/j.minpro.2015.04.015. ##

I. Plessis, Processing strategy for different coal types, J. S. Afr. Inst. Min. Metall. 110 (2010) 663–669. ##

Jameson, G. J. 2010. New directions in flotation machine design. Minerals Engineering 23 (11–13):835–41. doi:10.1016/j.mineng.2010.04.001. ##

Jena, M. S., S. K. Biswal, S. P. Das, and P. Reddy. 2008. Comparative study of the performance of conventional and column flotation when treating coking coal fines. Fuel Processing Technology 89:1409–15. doi:10.1016/j. fuproc.2008.06.012. ##

لورک آقا، غلام عباس، بنیسی، صمد، حاجی امین شیرازی، حسن، یوسف الهی، مهدی" ارزیابی عملکرد واحد واسطه سنگین کارخانه زغالشویی زرند، کنفرانس مهندسی معدن ایران، دانشگاه تربیت مدرس، 14-12 بهمن 1383. ##

اسماعیلی، محمدجواد و صلحی، سیدمحمد و بنیسی، صمد،1387، مدلسازی عملکرد هیدروسیکلون کارخانه زغالشویی اینترکربن (زرند) بر اساس مدلهای پلیت و ناکسوارا رائو، دومین کنفرانس مهندسی معدن. ##

امین آقایی، صبا و مظفری، پرویز و قاسمی، علی،1393، طراحی، ساخت و بهینهسازی سیکلون فقط آب،دومین کنگره ملی زغالسنگ ایران،کرمان،https://civilica.com/doc/331120 . ##

علیدخت، مهدی، معاونت فنی و مهندسی، اصلاح مدار تغلیظ کارخانه زغالشویی طبس از طریق نصب مدار سیکلون - تیتربد – اسپیرال، شرکت زغالسنگ پروده طبس، 1395. ##

Kohmuench, J.N., Mankosa, M.J., Honaker, R.Q., Bratton, R.C. (2006) Applications of the CrossFlow teeter-bed separator in the U.S. coal industry, Minerals and Metallurgical Processing, 23(4), 187-195. ##

Honaker, R. Q., Jain, M., Parekh, B. K., and Saracoglu, M., 2007, “Ultrafine coal cleaning using spiral conentrators”, Minerals Engineering, Vol. 20, No.14, pp. 1315- 1319. ##

Burt, R.O., 1984, Gravity Concentration Technology, Elsevier. Amsterdam, pp. 261-287. ##

Palowitch, E.R., Deurbrouck, A.W., Parsons, T.H. 1991, Wet fine particle concentration, Section 2, Hydraulic Concentration, in: Coal Preparation, Leonard, J.W. (Ed.), SME, Littleton, CO, 435-449. ##

Kapur, P. C., and Meloy, T. P., 1998, “Industrial modeling of spirals for optimal configuration and design: spiral geometry, fluid flow and forces on particles”, Powder Technology, Vol. 102, No.3, pp. 244-252. ##

Luttrell, G. H., and Honaker, R. Q., 2003, “OPERATING GUIDELINES for COAL SPIRAL CIRCUITS”, Coal Age, Vol. 108, No.8, pp. 26. ##

Bethell, P. J., and Arnold, B. J., 2003, “Comparing a two-stage spiral to two stages of spirals for fine coal preparation”, Advances in Gravity Concentration, by Honaker, R. Q., and Forrest, W. R. (Ed), SME, Littleton, CO, pp. 107-114. ##

DE KORTE, G.J.. Coal preparation research in South Africa. J. S. Afr. Inst. Min. Metall. online. 2010, vol.110, n.7, pp.361-364. ISSN 2411-9717. ##

Yusuf Enes Pural, Ayhan Ali Sirkeci & Feridun Boylu (2022) Simulation and Performance Evaluation of Three Product Dense Medium Cyclone, International Journal of Coal Preparation and Utilization, DOI: 10.1080/19392699.2022.2110085 . ##

V. Hornn, M. Ito, H. Shimada, C.B. Tabelin, S. Jeon, I. Park, N. Hiroyoshi, Agglomeration–flotation of finely ground chalcopyrite using emulsified oil stabilized
by emulsifiers: implications for porphyry copper ore flotation, Metals 10 (2020) 912, https://doi.org/10.3390/met10070912. ##

Driessen, H.H„ 1975, "Stamicarbons Heavy Medium Cyclone Process for the Separation of Minerals and Coal", Internal Stamicarbon/DSM Publication. ##

Driessen, M.G. 1948, "The Use of Hydraulic Cyclones as Thickeners and Washers in Modem Coal Preparation", Trans. AIME, Vol.177, pp.240-261. ##

DANIEL JOSE SUASNABAR, 2000, "Dense Medium Cyclone Performance Enhancement Via Computational Modelling of the Physical Processes", DOI: https://doi.org/10.26190/unsworks/18389 . ##

Michael J. Mankosa1, Jaisen N. Kohmuench1, Gerald H. Luttrell2, John A. Herbst3 and Aaron Noble3, 2016, "SPLIT-FEED CIRCUIT DESIGN FOR PRIMARY SULFIDE RECOVERY", 2Department of Mining & Minerals Engineering 100 Holden Hall, Virginia Tech Blacksburg, Virginia USA 24061. ##

Trahar, W.J., & Warren, L.J. (1976). The floatability of very fine particles – A review. International Journal of Mineral Processing, 3(2), 103–131. ##

Yianatos, J.B., Finch, J.A., & Laplante, A.R. (1988). Selectivity in column flotation froths. International Journal of Mineral Processing, 15(2), 279–292. ##

Laskowski, J. (1989). Frothing in Flotation, Gordon and Breach. ##