Studi Pelindian Mangan secara Reduksi dengan Menggunakan Larutan Asam Sulfat
Abstract
The leaching of manganese from manganese dioxide ores in sulfuric acid solution was investigated. The effects of agitation, sulfuric acid concentration and solid/liquid mass ratio on the leaching efficiency of manganese were studied. In this study, manganese dioxide ores were treated by reduction roasting using charcoal as a reductant at 700 oC for 120 min. Then, roasted samples were subjected to extract manganese by sulfuric acid leaching. in each leaching test, 75 g of sample was put and leached in a glass reactor with 750 mL sulfuric acid solution. At the end of each leaching experiment, the slurry was filtered and filtrate was analyzed by Atomic Absorption Spectrometer. The experimental results indicated that the leaching rate increases with the increases of the agitation, sulfuric acid concentration and with the decreases of solid/liquid mass ratio. The optimal condition for leaching manganese from manganese dioxide ores was determined as the agitation of 400 rpm and sulfuric acid concentration of 12% for 180 min at 75 oC. Under the optimal condition, the leaching efficiency of manganese can reach 84.61%.
Keywords : leaching, manganese ore, manganese sulfate, sulfuric acid
ABSTRAK
Proses pelindian mangan dari bijih mangan dioksida dalam larutan asam sulfat telah berhasil dilakukan. Tujuan penelitian untuk mempelajari pengaruh dari kecepatan pengadukan, konsentrasi asam sulfat dan perbandingan massa padatan/larutan terhadap mangan yang terekstrak. Dalam penelitian ini, bijih mangan dipreparasi melalui proses reduksi menggunakan arang pada 700 oC selama 120 menit selanjutnya dilindi menggunakan larutan asam sulfat. Pada setiap percobaan, sebanyak 75 gram sampel dimasukkan dan dilindi dengan 750 ml larutan H2SO4dalam gelas reaktor. Setelah proses pelindian, kemudian disaring dan dianalisa dengan menggunakan Atomic Absorption Spectrometer. Hasil percobaan menunjukkan bahwa laju pelindian meningkat dengan naiknya kecepatan pengadukan dan konsentrasi asam serta menurunnya rasio perbandingan persen padatan. Kondisi optimum diperoleh pada kecepatan pengadukan 400 rpm, konsentrasi asam sulfat 12% pada 75 oC selama 180 menit dengan mangan terekstrak sebesar 84,61%.
Kata kunci : asam sulfat, bijih mangan, pelindian, mangan sulfat
Keywords
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Das, S.C, Sahoo, P.K, Rao, P.K. Extraction Of Manganese from Low grade Manganese Ores by Ferrous Sulfate Leaching. Hydrometallurgy. 1982;Vol. 8 (I): pp. 35-47.
ESDM. 2015. Data Pertambangan Mineral dan Batu bara. http://www.tekmira.esdm.go.id/, (diakses pada tanggal 1 September 2015 pukul 14.00 WIB).
Habashi,F. Handbook of Extractive Metallurgy Vol II. Primary Metals, Secondary Metals, Light Metals. New York:Wiley-VCH. 1997.
Jianrong, X., Zhong, H., Wang, S., Changxin, L., Jinzhong, L., and Fangfang W. Kinetics of reduction leaching of manganese dioxide ore with Phytolacca americana in sulfuric acid solution.Journal of Saudi Chemical Society. 2014; Vol.20: pp.437-442.
Levenspiel,O.Chemical Reaction Engineering. 3th edition. New York: John Willey and Sons. 1999.
Nayl, A.A., Ismail, I.M., Aly, H.F.Recovery of pure MnSO4∙H2O by reductive leaching of manganese from pyrolusite ore by sulfuric acid and hydrogen peroxide. International Journal of Mineral Processing. 2011; Vol. 100: pp. 116–123.
Suere, E., Olsen, Metere Tangstad.Production Of Manganese ferro Alloys. Tapir Academic Press. 2003.
Xike, T., Xiaoxia, W., Yang, C., Liang, Y., Zhengbang, P., and Wang, Y. Reductive leaching of manganese from low-grade manganese dioxide ores using corncob as reductant in sulfuric acid solution.Hydrometallurgy. 2010; Vol.100 (Issues 3–4): pp. 157–160.
Youcai, L., Qingquan, L., Lifeng, L., Jiangang, F., Zhongsi, Z., Wang, C., and Dong, Q. Study on hydrometallurgical process and kinetics of manganese extraction from low-grade manganese carbonate ores.International Journal of Mining Science and Technology. 2014; Vol. 24 ( Issue 4):pp. 567–571.
Yuanbo, Z., Zhixiong, Y., Guanghui, L., Tao, J .Manganese extraction by sulfur-based reduction roasting–acid leaching from low-grade manganese oxide ores. Hydrometallurgy. 2013;Vol. 133: pp. 126–132.
Zhang, W., Cheng, C,Y. Manganese Metallurgy Review Part I: Leaching of Ore/Secondary Materials and Recovery of Electrolytic/Chemical Manganese Dioxide.Hydrometallurgy. 2007; Vol. 89: pp. 137-159.
Zhao, Y., Zhu, G., Cheng, Z. Thermal analysis and kinetic modeling of manganese oxide ore reduction using biomass straw as reductant.Hydrometallurgy.2010; Vol.105: pp 96-102.
DOI: http://dx.doi.org/10.26578/jrti.v11i1.1724
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