Mineral phase and structure changes during roasting of fine-grained carbonaceous gold ores and their effects on gold leaching efficiency

doi:10.1016/j.cjche.2018.08.006

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (5): 1184-1190.DOI: 10.1016/j.cjche.2018.08.006

• Energy, Resources and Environmental Technology • 上一篇下一篇

Mineral phase and structure changes during roasting of fine-grained carbonaceous gold ores and their effects on gold leaching efficiency

Jianping Jin^1,2, Yuexin Han¹, Hui Li³, Yangyang Huai⁴, Yongjun Peng⁴, Xiaotian Gu¹, Wei Yang³

1 School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China;
2 Xi'an Northwest Geological Institute Company of Nonferrous Metals Co., Ltd., Xi'an 710054, China;
3 College of Material and Resource, Xi'an University of Architecture and Technology, Xi'an 710055, China;
4 School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane 4072, Australia

收稿日期:2018-07-01 修回日期:2018-08-07 出版日期:2019-05-28 发布日期:2019-06-27
通讯作者: Jianping Jin
基金资助:
Supported by the National Natural Science Foundation of China (51704059, 51474169).

Mineral phase and structure changes during roasting of fine-grained carbonaceous gold ores and their effects on gold leaching efficiency

Jianping Jin^1,2, Yuexin Han¹, Hui Li³, Yangyang Huai⁴, Yongjun Peng⁴, Xiaotian Gu¹, Wei Yang³

1 School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China;
2 Xi'an Northwest Geological Institute Company of Nonferrous Metals Co., Ltd., Xi'an 710054, China;
3 College of Material and Resource, Xi'an University of Architecture and Technology, Xi'an 710055, China;
4 School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane 4072, Australia

Received:2018-07-01 Revised:2018-08-07 Online:2019-05-28 Published:2019-06-27
Contact: Jianping Jin
Supported by:
Supported by the National Natural Science Foundation of China (51704059, 51474169).

摘要/Abstract

摘要： While roasting has been widely applied to reduce the negative effect of carbonaceous matters on gold extraction from fine-grained carbonaceous gold ores, the phase and structure changes of minerals during roasting and their influences on the leaching rate of gold have not been fully understood. This limits the extraction of carbonaceous gold deposits. The current work examines the oxidation process of a fine-grained carbonaceous gold ore during roasting using a range of techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy Dispersive Spectrometer (EDS) analysis and pore structure analysis together with gold leaching tests. The results show that during the process of oxidative roasting, the carbonaceous matters (organic carbon and graphitic carbon) and pyrite were completely decomposed at 600℃ with the carbonaceous components burned and pyrite oxidized into hematite. At 650℃, while dolomite was decomposed into calcia, magnesia, calcium sulfate etc., the calcine structure became loose and porous, leading to a high gold leaching rate from the roasted product. Above 750℃, the porous calcite structure started to collapse along with the agglomeration, leading to the secondary encapsulation of gold particles, which contributed to the sharp drop in the gold leaching rate of the roasted product. This study suggests optimum phase and structure changes of minerals during roasting to achieve maximum gold extraction from fine-grained carbonaceous gold deposits.

关键词: Carbonaceous gold ore, Roasting, Leaching, X-ray diffraction (XRD), Scanning electron microscopy (SEM)

Abstract: While roasting has been widely applied to reduce the negative effect of carbonaceous matters on gold extraction from fine-grained carbonaceous gold ores, the phase and structure changes of minerals during roasting and their influences on the leaching rate of gold have not been fully understood. This limits the extraction of carbonaceous gold deposits. The current work examines the oxidation process of a fine-grained carbonaceous gold ore during roasting using a range of techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy Dispersive Spectrometer (EDS) analysis and pore structure analysis together with gold leaching tests. The results show that during the process of oxidative roasting, the carbonaceous matters (organic carbon and graphitic carbon) and pyrite were completely decomposed at 600℃ with the carbonaceous components burned and pyrite oxidized into hematite. At 650℃, while dolomite was decomposed into calcia, magnesia, calcium sulfate etc., the calcine structure became loose and porous, leading to a high gold leaching rate from the roasted product. Above 750℃, the porous calcite structure started to collapse along with the agglomeration, leading to the secondary encapsulation of gold particles, which contributed to the sharp drop in the gold leaching rate of the roasted product. This study suggests optimum phase and structure changes of minerals during roasting to achieve maximum gold extraction from fine-grained carbonaceous gold deposits.

Key words: Carbonaceous gold ore, Roasting, Leaching, X-ray diffraction (XRD), Scanning electron microscopy (SEM)

Jianping Jin, Yuexin Han, Hui Li, Yangyang Huai, Yongjun Peng, Xiaotian Gu, Wei Yang. Mineral phase and structure changes during roasting of fine-grained carbonaceous gold ores and their effects on gold leaching efficiency[J]. 中国化学工程学报, 2019, 27(5): 1184-1190.

参考文献

[1] H.Y. Yang, Q. Liu, X.L. Song, J.K. Dong, Research status of carbonaceous matter in carbonaceous gold ores and bio-oxidation pretreatment, Chin. J. Nonferrous Met. 23(11) (2013) 3405-3411.
[2] Z.H. Fang, Mineral characteristic and extractive technology of carbonaceous gold ores, J. Gold Sci. Technol. 6(2003) 28-30.
[3] B. Nanthakumar, C.A. Pickles, S. Kelebek, Microwave pre-treatment of a double refractory gold ore, Miner. Eng. 20(11) (2007) 1109-1119.
[4] I. De Michelis, A. Olivieri, S. Ubaldini, F. Ferella, F. Beolchini, F. Vegliò, Roasting and chlorine leaching of gold-bearing refractory concentrate:Experimental and process analysis, Int. J. Min. Sci. Technol. 23(5) (2013) 709-715.
[5] J. Hammerschmidt, J. Guntner, B. Kerstiens, Roasting of gold ore in the circulating fluidized-bed technology, Dev. Miner. Process. 15(9) (2005) 433-453.
[6] Q. Li, Y. Zhang, X.L. Liu, B. Xu, Y.B. Yang, T. Jiang, Improvement of gold leaching from a refractory gold concentrate calcine by separate pretreatment of coarse and fine size fractions, Fortschr. Mineral. 7(5) (2017) 80-89.
[7] N.C. Choi, B.J. Kim, K. Cho, S. Lee, C.Y. Park, N.C. Choi, Microwave pretreatment for thiourea leaching for gold concentrate, Metals 7(10) (2017) 404-411.
[8] P. Schmitz, S. Duyvesteyn, W.P. Johnson, L. Enloe, J. Mcmullen, Ammoniacal thiosulfateand sodium cyanide leaching of preg-robbing Goldstrike ore carbonaceous matter, J. Hydrometallurgy 60(1) (2001) 25-40.
[9] J.D. Ford, D.C.T. Pei, High temperature chemical processing via microwave absorption, J. Microw. Power Electromagn. Energy. 2(2) (1967) 61-64.
[10] R.K. Amankwah, W.T. Yen, J.A. Ramsay, A two-stage bacterial pretreatment process for double refractory gold ores, Miner. Eng. 18(1) (2005) 103-108.
[11] K.S. Frser, R.H. Whlton, J.A. Wells, Processing of refractory gold ores, Miner. Eng. 4(1991) 1029-1041.
[12] P.M. Afenya, Treatment of carbonaceous refractory gold ores, Miner. Eng. 4(7-11) (1991) 1043-1055.
[13] A. Wang, Y.K. Zhang, H.Z. Liu, The property of carboniferous species and its effect on leaching of gold in Dongbeizhai Gold Mine, J. Mult. Util. Miner. Res. 3(2000) 4-8.
[14] B. Liu, Z. Zhang, L. Li, Y. Wang, Recovery of gold and Iron from the cyanide tailings by magnetic roasting, J. Rare Met. Mater. Eng. 42(9) (2013) 1805-1809.
[15] M. Hassanpour, H. Safardoust-Hojaghan, M. Salavati-Niasari, Degradation of methylene blue and rhodamine B as water pollutants via green synthesized Co₃O₄/ZnO nanocomposite, J. Mol. Liq. 229((2017) 293-299.
[16] H. Safardoust-Hojaghan, M. Salavati-Niasari, O. Amiri, Preparation of highly luminescent nitrogen doped graphene quantum dots and their application as a probe for detection of Staphylococcus aureus, and E. coli, J. Mol. Liq. 241(2017) 1114-1119.
[17] O. Amiri, M. Salavati-Niasari, N. Mir, Plasmonic enhancement of dye-sensitized solar cells by using Au-decorated Ag dendrites as a morphology-engineered, Renew. Energy 125(2018) 590-598.
[18] G.M.K. Abotsi, K. Osseo-Asare, Surface chemistry of carbonaceous gold ores:I. Characterization of the carbonaceous matter and adsorption behaviour in aurocyanide solution, Int. J. Miner. Process. 18(3) (1986) 217-236.
[19] G.M.K. Abotsi, K. Osseo-Asare, Surface chemistry of carbonaceous gold ores, Ⅱ. Effects of organic additives on gold adsorption from cyanide solution, Int. J. Miner. Process. 21(3) (1987) 225-239.
[20] D.M. Hausen, C.H. Bucknam, Study of preg robbing in the cyanidation of carbonaceous gold ores from Carlin, Proc. SecondInt. Congress on Applied Mineralogy in the Minerals Industry, Metallurgical Society of AIME, Warrendale 1984, pp. 833-856.
[21] M.C. Jha, Refractoriness of certain gold ores to cyanidation:Probable causes and possible solutions, Miner. Process. Extr. Metall. Rev. 2(4) (1987) 331-352.
[22] T. Quach, D. Koch, F. Lawson, Adsorption of gold cyanide on gangue minerals, Twenty-first Australasian Chemical Engineering Conference, Institution of Engineers, Australia 1993, pp. 101-106.
[23] J.Y. Tang, Y.M. Zhang, S.X. Bao, The influence of roasting temperature on the flotation properties of muscovite, Fortschr. Mineral. 6(2) (2016) 53-63.
[24] G. Hu, K. Dam-Johansen, S. Wedel, Decomposition and oxidation of pyrite, J. Prog. Energy Combust. 32(3) (2006) 295-314.
[25] Y. Zhou, H. Yang, X.X. Xue, S. Yuan, Separation and recovery of iron and rare earth from Bayan Obo tailings by magnetizing roasting and (NH₄)₂SO₄ activation roasting, Metals 7(6) (2017) 195-203.
[26] J.P. Wang, Y.M. Zhang, T. Liu, J. Huang, Evaluation of microwave intensified vanadium bearing-high carbonaceous shale acid extraction process, Fortschr. Mineral. 8(3) (2018) 113-120.
[27] M.M. Dubinin, Fundamentals of the theory of adsorption in microporess of carbon adsorbents:Characteristics of their adsorption properties and microporous structures, Carbon 27(3) (1990) 457-467.
[28] R.R. Xu, W.Q. Pang, Chemistry-Zeolite and Porous Materials, Science Press, Beijing. China, 2005146-147.
[29] L. Deng, B. Qu, S.J. Su, S.L. Ding, W.Y. Sun, Extraction of iron and manganese from pyrolusite absorption residue by ammonium sulphate roasting-leaching process, Metals 8(1) (2018) 38-45.

Mineral phase and structure changes during roasting of fine-grained carbonaceous gold ores and their effects on gold leaching efficiency

Mineral phase and structure changes during roasting of fine-grained carbonaceous gold ores and their effects on gold leaching efficiency

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