فلوتاسیون کانسنگ ایلمنیت: تاثیر انحلال سطحی بر سینتیک فلوتاسیون و سینتیک جذب کلکتور

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترا دانشگاه امیرکبیر

2 Mining & Metallurgical Eng. Department

3 دانشگاه امیرکبیر

چکیده

اثر انحلال سطحی با اسید اگزالیک بر سینتیک فلوتاسیون و سینتیک جذب کلکتور برای ایلمنیت در حضور کانی‌های گانگ الیوین - پیروکسن، ترمولیت – کلینوکلر و کوارتز بررسی شد. برازش مدل سینتیکی مرتبه اول بر روی نتایج فلوتاسیون قبل و بعد از انحلال سطحی نشان داد که ثابت سینتیک و بازیابی زمان بینهایت ایلمنیت افزایش و این مقادیر برای کانی‌های گانگ کاهش یافته است. اندیس انتخابی سینتیکی ایلمنیت پس از انحلال سطحی در حضور کانی‌های الیوین - پیروکسن، ترمولیت - کلینوکلر و کوارتز به ترتیب از 1/28 به 1/98 ،از 1/42 به3/02 و از 3/05 به 3/58 افزایش یافته است که نشان‌دهنده تاثیر مثبت فرآیند انحلال سطحی است. بررسی نشان داد که جذب کلکتور از مدل سینتیکی مرتبه دوم پیروی می‌کند و پس از انحلال سطحی سینتیک جذب کلکتور و نرخ جذب اولیه کلکتور بر سطح ایلمنیت از 3/85 به8/44 گرم بر مول دقیقه افزایش و برای کانی‌های الیوین - پیروکسن، ترمولیت – کلینوکلر و کوارتز به ترتیب از 6/33 به 5/03 ،از 7/3 به 6/22 و از 7/77 به 7/37 گرم بر مول دقیقه کاهش یافته است. این نتایج با نتایج جذب کلکتور توسط آنالیز فرابنفش مطابقت داشت بطوریکه پس از انحلال سطحی میزان جذب کلکتور روی سطح ایلمنیت افزایش و در مورد کانی‌های گانگ کاهش می‌یابد. نتایج میکروسکوپ الکترونی نشان داد پس از انحلال سطحی، سطح ذرات ایلمنیت هموارتر و یکنواخت تر شده و در مورد کانی‌های گانگ، به دلیل انحلال بیشتر کاتیون‌های سطحی، حفراتی در سطح ذرات ایجاد می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Impact of surface dissolution on flotation kinetics and kinetics of collector adsorption on ilmenite ore

نویسندگان [English]

  • Omid Salmani Nuri 1
  • mehdi Irannajad 2
  • Akbar Mehdilo 3
1 Amirkabir University of Technology
3 AUT
چکیده [English]

In this study, the effect of surface dissolution by oxalic acid was investigated on the flotation kinetics and kinetics of collector adsorption for ilmenite in the presence of olivine-pyroxene, tremolite-clinochlore and quartz. Fitting of first-order kinetic model on the results of flotation before and after surface dissolution showed that flotation kinetic constant (K) and ultimate recovery (R∞) of ilmenite is increased after surface dissolution and they are decreased for gangue minerals. The results showed that the kinetic selectivity index of ilmenite in the presence of olivine-pyroxene, tremolite-clinochlore and quartz are increased from 1.28 to 1.98, 1.42 to 3.02, and 3.58, respectively, after surface dissolution indicating the positive effect of surface dissolution process. Investigating the kinetics of collector adsorption showed that the collector adsorption is conforming to second[1]order kinetic model. After surface dissolution, the kinetics of collector adsorption and initial rate of collector adsorption on ilmenite surface is increased from 3.85 to 8.44 g.mol-1 min-1 and it is decreased for olivine-pyroxene, tremolite-clinochlore and quartz from 6.33 to 5.03, 7.3 to 6.22 and 7.77 to 7.37 g.mol-1 min-1, respectively. These results are in good agreement with the results of collector adsorption via UV analysis which the collector adsorption on ilmenite surface is increased and it is decreased for gangue minerals after surface dissolution. The results of SEM showed that the surface of ilmenite becomes smoother and uniform and about the gangue minerals, some cavities are produced due to dissolution of surface cations.

کلیدواژه‌ها [English]

  • Surface dissolution
  • Kinetics
  • Flotation
  • Collector adsorption
  • Ilmenite

مراجع

[1] S.Y. Cho, S.J. Kim, T.Y. Kim, H. Moon, S.J. Kim, Adsorption characteristics of 2, 4-dichlorophenoxyacetic acid and 2, 4-dinitrophenol in a fixed bed adsorber, Korean Journal of Chemical Engineering, 20(2) (2003) 365-374.
[2] P.E.N. B. eslami, E. Ghasemi, H. Azizi, M. Karabi, Investigation about adsorption of Cd ion from Aqouse solution by Nanocomposite based on Chitosan/ Nano Graphen Modified by TriEtylAmyl, Journal of Chemistry and chemistry emgineering, 2(63) (1396) 115-125.
[3] P. Somasundaran, Physico-chemical aspects of adsorption of surface active agents on minerals, Croatica Chemica Acta, 52(2) (1979) 67-86.
[4] P. Somasundaran, D. Wang, Solution chemistry: minerals and reagents, Elsevier, 2006.
[5] B. Rezai, Flotation Technology, Nahre Danesh Publishing, Tehran, 1394.
[6] A. Omar, E. Azzam, Relation between adsorption of some anionic surfactants on barite and solution/air interfaces, Surface and Interface Analysis: An International Journal devoted to the development and application of techniques for the analysis of surfaces, interfaces and thin films, 35(8) (2003) 709-713.
[7] R. Wick, P. Walde, P.L. Luisi, Light microscopic investigations of the autocatalytic self-reproduction of giant vesicles, Journal of the American Chemical Society, 4(117)(1995) 1435-1436.
[8] B.A. Wills, J. Finch, Wills' mineral processing technology: an introduction to the practical aspects of ore treatment and mineral recovery, Butterworth-Heinemann, 2015.
[9] J. Drzymała, Mineral processing: foundations of theory and practice of minerallurgy, University of Technology, 2007.
[10] A.M. M. Brozek, Wydaw, in, Insty. Gospo. Suro. Mine. i Ene, 2009.
[11] O. Guven, M.S. Celik, J.W. Drelich, Flotation of methylated roughened glass particles and analysis of particle–bubble energy barrier, Minerals Engineering, 79 (2015) 125-132.
[12] P.N. A. Bakalarz, M. Duchnowska, A. Konieczny, E. Kasinska-Pilut, W. Pawlos, R. Kaleta, P.B. Kowalczuk, J. Drzymala, A. Luszczkiewicz, Czasopismo CUPRUM,2(75)(2015) .
[13] Y. Xing, X. Gui, J. Liu, Y. Cao, Y. Zhang, S. Li, Flotation behavior of hard-to-separate and high-ash fine coal, Physicochemical Problems of Mineral Processing, 52 (2016).
[14] M. Gharai, R. Venugopal, Modeling of flotation process—an overview of different approaches, Mineral Processing and Extractive Metallurgy Review, 37(2) (2016) 120-133.
[15] X. Bu, G. Xie, Y. Chen, C. Ni, The order of kinetic models in coal fines flotation, International Journal of Coal Preparation and Utilization, 37(3) (2017) 113-123.
[16] D. Brown, H. Smith, The flotation of coal as a rate process, Trans. AIME, 113 (1954) 1001.
[17] E. Cilek, Estimation of flotation kinetic parameters by considering interactions of the operating variables, Minerals Engineering, 17(1) (2004) 81-85.
[18] O.S. Nuri, E. Allahkarami, A. Abdollahzadeh, Modeling and Optimization of SE and SI of Copper Flotation via Hybrid GA–ANN, Transactions of the Indian Institute of Metals, 70(9) (2017) 2255-2263.
[19] X. Fan, K.E. Waters, N.A. Rowson, D.J. Parker, Modification of ilmenite surface chemistry for enhancing surfactants adsorption and bubble attachment, Journal of colloid and interface science, 329(1) (2009) 167-172.
[20] X. Fan, N. Rowson, The effect of Pb (NO3) 2 on ilmenite flotation, Minerals Engineering, 13(2) (2000) 205--215.
[21] X.-f. Fan, N. Rowson, Fundamental investigation of microwave pretreatment on the flotation of massive ilmenite ores, Developments in Chemical Engineering and Mineral Processing, 8(1‐2) (2000) 167-182.
[22] A.S. M. Maleki Moghadam, H. Haji Amin Shirazi, Investigation about Surface activating and acid treatment in ilmenite recovery, Journal of Chemistry and chemistry engineering, 1(31) (1391) 81-88.
[23] W. Sutton, M. Brooks, I. Chabinsky, Microwave processing of materials, Pittsburgh, PA (USA); Materials Research Society, 1988.
[24] Y.-g. Zhu, G.-f. Zhang, Q.-m. Feng, D.-c. Yan, W.-q. Wang, Effect of surface dissolution on flotation separation of fine ilmenite from titanaugite, Transactions of nonferrous metals society of china, 21(5) (2011) 1149-1154.
[25] P.S. Parapari, M. Irannajad, A. Mehdilo, Modification of ilmenite surface properties by superficial dissolution method, Minerals Engineering, 92 (2016) 160-167.
[26] S. Bulatovic, Flotation of titanium minerals, in, Elsevier Amsterdam, 2010, pp. 175-207.
[27] R. Zheng, Z. Ren, H. Gao, Y. Qian, Flotation behavior of different colored fluorites using sodium oleate as a collector, Minerals, 7(9) (2017) 159.
[28] R. Sripriya, P. Rao, B.R. Choudhury, Optimisation of operating variables of fine coal flotation using a combination of modified flotation parameters and statistical techniques, International Journal of Mineral Processing, 68(1-4) (2003) 109-127.
[29] G. Agar, B. TJ, Optimizing the design of flotation circuits, (1980)
[30] M. Xu, Modified flotation rate constant and selectivity index, Minerals Engineering, 11(3) (1998) 271-278.
[31] .K. Lagergren, About the theory of so-called adsorption of soluble substances, Sven. Vetenskapsakad. Handingarl, 24 (1898) 1-39.
[32] Y.-S. Ho, Review of second-order models for adsorption systems, Journal of hazardous materials, 136(3) (2006) 681-689.
[33] D. Guerra, I. Mello, R. Resende, R. Silva, Application as absorbents of natural and functionalized Brazilian bentonite in Pb2+ adsorption: Equilibrium, kinetic, pH, and thermodynamic effects, Water Resources and Industry, 4 (2013) 32-50.
[34] P.S. Parapari, M. Irannajad, A. Mehdilo, Effect of acid surface dissolution pretreatment on the selective flotation of ilmenite from olivine and pyroxene, International Journal of Mineral Processing, 167 (2017) 49-60.
[35] G.E. Agar, Simulation in mineral processing, in:  Mineral Processing Design, Springer, 1987, pp. 268-287.
[36] B. Wills, T. Napier-Munn, Mineral Processing Technology, Butterowrth, Heinemann, Oxford, edn, 6 (1997) 284-316.
[37] G. Agar, J. Chia, L. Requis-c, Flotation rate measurements to optimize an operating circuit, Minerals Engineering, 11(4) (1998) 347-360.
[38] S. Ilhan, A. Kalpakli, C. Kahruman, I. Yusufoglu, The investigation of dissolution behavior of gangue materials during the dissolution of scheelite concentrate in oxalic acid solution, Hydrometallurgy, 136 (2013) 15-26.
[39] M.Abdollahi, Flotation chemistry, jahad daneshghahi Taarbiat Modarres, Amirkabir unit, 1382.
 
نشریه مهندسی عمران امیرکبیر
دوره 52، شماره 6
شهریور 1399
صفحه 1469-1484

فایل ها

هم رسانی

ارجاع به این مقاله

آمار