Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination

Sun Yanwen; Yuan Chaoxin; Guo Chihao; Li Dajiang; Li Yibin; Mu Liangzhao

doi:doi:10.11648/j.ijmpem.20210602.11

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Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination

Sun Yanwen, Yuan Chaoxin, Guo Chihao, Li Dajiang, Li Yibin, Mu Liangzhao

Published in International Journal of Mineral Processing and Extractive Metallurgy (Volume 6, Issue 2)

Received: 21 April 2021 Accepted: 6 May 2021 Published: 14 May 2021

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Abstract

Cyanide tailings produced in gold smelting process contain a large number of heavy metals and cyanides, which are more and more harmful to the environment. In order to reduce environmental pollution, valuable metals from cyanide tailings are recovered. The amount of calcium chloride, chlorination time, the way of adding calcium chloride and other factors on the influence of gold and silver extraction by chlorination were studied by using the raw material of cyanide tailings with melting chlorination process in this paper, and how to reduce the melting chlorination temperature was explored, and a comprehensive experiment was carried out under the best conditions. The results showed that when the chlorination temperature is 1500°C, the chlorination time is 1 h, and the addition amount of CaCl₂ is 7%, the volatilization rate of gold is 85.38%, the content of gold in slag is 1.83 g/t, the volatilization rate of silver is 77.36%, and the content of silver in slag is 4.12 g/t; when the chlorination temperature is 1500°C, 7% CaCl₂ is added, and the chlorination time is 15 min, the volatilization rate of gold is 87.78%, the content of gold in slag is 1.23 g/t, the volatilization rate of silver is 59.40%, and the content of silver in slag is 7.39 g/t; the addition of 5% CaO can change the slag type, reduce the chlorination temperature by 50~100°C, increase the volatilization rate of gold and silver slightly, and decrease the content of gold and silver in slag; when CaCl₂ is added in five times, the volatilization rate of gold increases to 95.53%, the content of gold in slag decreases to 0.56g/t, the volatilization rate of silver increases to 77.80%, and the content of silver in slag decreases to 4.04 g/t; 7% CaCl₂ was added in five times, and the melting chlorination time was 15 min. the amount of CaO was 5%, and the melting chlorination temperature was 1450°C, the gold volatilization rate is 95.69%, and the gold content of slag is 0.54 g/t, the silver volatilization rate is 77.06% and the silver content of slag is 4.20 g/t.

Published in	International Journal of Mineral Processing and Extractive Metallurgy (Volume 6, Issue 2)
DOI	10.11648/j.ijmpem.20210602.11
Page(s)	20-23
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Cyanide Tailings, Melting Chlorination, Calcium Chloride, Calcium Oxide, Volatile Rate

References

[1]	Lv Cuicui, Ding Jian, Fu Guoyan, et al. Current situation and prospect of recovery of valuable elements from cyanide tailings [J]. CIESC Journal, 2016, 67 (4): 1079-1089.
[2]	Sun Liugen, Chang Yaochao, Xu Xiaohui, et al. Current status and development trend of main technologies for harmless and resource utilization of cyanide tailings [J]. China Comprehensive Utilization of Resources, 2017, 35 (10): 59-62.
[3]	GHOBEITIHASAB M, RASHCHI F, RAYGAN S. Chloride hypochlorite leaching and hydrochloric acid washing in multi-stages for extraction of gold from a refractory concentrate [J]. Hydrometallurgy, 2014, 142 (2): 56-59.
[4]	LYU C C, DING J, QIAN P, et al. Comprehensive recovery of metals from cyanidation tailing [J]. Minerals Engineering, 2015, 70: 141-147.
[5]	Wang Weida, Feng Yali, Li Haoran, et al. Recovery of gold from cyanide tailings by alkaline leaching desilication process [J]. The Chinese Journal of Nonferrous Metals, 2015, 25 (1): 233-240.
[6]	Sun Xudong, Pan Dean, Gong Yu, et al. Preparation of Ceramsite from Cyanide Tailings by Hi-temperature Chlorination Roasting Process [J]. Nonferrous Metals (Smelting Section), 2020 (6): 70-79.
[7]	Zhang Shuke, Qu Bangding. Experimental study on gold extraction from gold containing materials by high temperature chlorination volatilization [J]. China Comprehensive Utilization of Resources, 2020, 38 (2): 8-10.
[8]	Li Zhengyao, Wang Weiwei, Le Kun. Recovery of Gold and Iron from Cyanide Tailings by Chlorination Volatilization and Reduction Roasting with One-step Method [J]. METAL MINE, 2015, 44 (10): 173-177.
[9]	Zhang Zhaohui, Jiang Hanlong, LIU Bailong, et al. Research on recovery of gold and silver from molten salt treatment of cyanide tailings by roasting [J]. Bulletin of the Chinese Ceramic Society, 2016, 35 (2): 582-586.
[10]	Liu Hongxiao, Wang Weizhen, Yang Xingqing, et al. Research on Chlorination Roasting Process of Cyanide Tailings [J]. Mining and Metallurgy, 2016, 25 (1): 75-77.
[11]	Sun Liugen, Huang Haihui, Xu Xiaohui, et al. Experimental Study on Recovery of Valuable Metals from Roasting and Cyaniding Tailings [J]. Nonferrous Metals (Smelting Section), 2017 (2): 15-18.
[12]	Li Dajiang, Guo Zhihao, Yuan Chaoxin, et al. Research on the process and economy of gold extraction from cyanide tailings by chlorination roasting [J]. China Comprehensive Utilization of Resources, 2018, 36 (8): 45-46.
[13]	Hu Lei, Huo Songling, Guo Zhihao, et al. Experimental study on extraction of gold from chlorinated volatile gold slime [J]. Nonferrous Metals (Smelting Section), 2018 (8): 52-59.
[14]	Sun Yanwen, Guo Chihao, Li Yibin. Study on chlorination of cinder from a pyrite mine in Indonesia [J]. China Comprehensive Utilization of Resources, 2020, 38 (8): 1-4.
[15]	Liang Dongdong, Guo Zhihao, Yuan Chaoxin, et al. Experimental study on gold extraction from gold bearing materials by chlorination [J]. Nonferrous Metals (Metallurgical Section), 2019 (10): 63-66.

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APA Style

Sun Yanwen, Yuan Chaoxin, Guo Chihao, Li Dajiang, Li Yibin, et al. (2021). Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination. International Journal of Mineral Processing and Extractive Metallurgy, 6(2), 20-23. https://doi.org/10.11648/j.ijmpem.20210602.11

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ACS Style

Sun Yanwen; Yuan Chaoxin; Guo Chihao; Li Dajiang; Li Yibin, et al. Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination. Int. J. Miner. Process. Extr. Metall. 2021, 6(2), 20-23. doi: 10.11648/j.ijmpem.20210602.11

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AMA Style

Sun Yanwen, Yuan Chaoxin, Guo Chihao, Li Dajiang, Li Yibin, et al. Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination. Int J Miner Process Extr Metall. 2021;6(2):20-23. doi: 10.11648/j.ijmpem.20210602.11

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@article{10.11648/j.ijmpem.20210602.11,
  author = {Sun Yanwen and Yuan Chaoxin and Guo Chihao and Li Dajiang and Li Yibin and Mu Liangzhao},
  title = {Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination},
  journal = {International Journal of Mineral Processing and Extractive Metallurgy},
  volume = {6},
  number = {2},
  pages = {20-23},
  doi = {10.11648/j.ijmpem.20210602.11},
  url = {https://doi.org/10.11648/j.ijmpem.20210602.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmpem.20210602.11},
  abstract = {Cyanide tailings produced in gold smelting process contain a large number of heavy metals and cyanides, which are more and more harmful to the environment. In order to reduce environmental pollution, valuable metals from cyanide tailings are recovered. The amount of calcium chloride, chlorination time, the way of adding calcium chloride and other factors on the influence of gold and silver extraction by chlorination were studied by using the raw material of cyanide tailings with melting chlorination process in this paper, and how to reduce the melting chlorination temperature was explored, and a comprehensive experiment was carried out under the best conditions. The results showed that when the chlorination temperature is 1500°C, the chlorination time is 1 h, and the addition amount of CaCl2 is 7%, the volatilization rate of gold is 85.38%, the content of gold in slag is 1.83 g/t, the volatilization rate of silver is 77.36%, and the content of silver in slag is 4.12 g/t; when the chlorination temperature is 1500°C, 7% CaCl2 is added, and the chlorination time is 15 min, the volatilization rate of gold is 87.78%, the content of gold in slag is 1.23 g/t, the volatilization rate of silver is 59.40%, and the content of silver in slag is 7.39 g/t; the addition of 5% CaO can change the slag type, reduce the chlorination temperature by 50~100°C, increase the volatilization rate of gold and silver slightly, and decrease the content of gold and silver in slag; when CaCl2 is added in five times, the volatilization rate of gold increases to 95.53%, the content of gold in slag decreases to 0.56g/t, the volatilization rate of silver increases to 77.80%, and the content of silver in slag decreases to 4.04 g/t; 7% CaCl2 was added in five times, and the melting chlorination time was 15 min. the amount of CaO was 5%, and the melting chlorination temperature was 1450°C, the gold volatilization rate is 95.69%, and the gold content of slag is 0.54 g/t, the silver volatilization rate is 77.06% and the silver content of slag is 4.20 g/t.},
 year = {2021}
}

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TY  - JOUR
T1  - Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination
AU  - Sun Yanwen
AU  - Yuan Chaoxin
AU  - Guo Chihao
AU  - Li Dajiang
AU  - Li Yibin
AU  - Mu Liangzhao
Y1  - 2021/05/14
PY  - 2021
N1  - https://doi.org/10.11648/j.ijmpem.20210602.11
DO  - 10.11648/j.ijmpem.20210602.11
T2  - International Journal of Mineral Processing and Extractive Metallurgy
JF  - International Journal of Mineral Processing and Extractive Metallurgy
JO  - International Journal of Mineral Processing and Extractive Metallurgy
SP  - 20
EP  - 23
PB  - Science Publishing Group
SN  - 2575-1859
UR  - https://doi.org/10.11648/j.ijmpem.20210602.11
AB  - Cyanide tailings produced in gold smelting process contain a large number of heavy metals and cyanides, which are more and more harmful to the environment. In order to reduce environmental pollution, valuable metals from cyanide tailings are recovered. The amount of calcium chloride, chlorination time, the way of adding calcium chloride and other factors on the influence of gold and silver extraction by chlorination were studied by using the raw material of cyanide tailings with melting chlorination process in this paper, and how to reduce the melting chlorination temperature was explored, and a comprehensive experiment was carried out under the best conditions. The results showed that when the chlorination temperature is 1500°C, the chlorination time is 1 h, and the addition amount of CaCl2 is 7%, the volatilization rate of gold is 85.38%, the content of gold in slag is 1.83 g/t, the volatilization rate of silver is 77.36%, and the content of silver in slag is 4.12 g/t; when the chlorination temperature is 1500°C, 7% CaCl2 is added, and the chlorination time is 15 min, the volatilization rate of gold is 87.78%, the content of gold in slag is 1.23 g/t, the volatilization rate of silver is 59.40%, and the content of silver in slag is 7.39 g/t; the addition of 5% CaO can change the slag type, reduce the chlorination temperature by 50~100°C, increase the volatilization rate of gold and silver slightly, and decrease the content of gold and silver in slag; when CaCl2 is added in five times, the volatilization rate of gold increases to 95.53%, the content of gold in slag decreases to 0.56g/t, the volatilization rate of silver increases to 77.80%, and the content of silver in slag decreases to 4.04 g/t; 7% CaCl2 was added in five times, and the melting chlorination time was 15 min. the amount of CaO was 5%, and the melting chlorination temperature was 1450°C, the gold volatilization rate is 95.69%, and the gold content of slag is 0.54 g/t, the silver volatilization rate is 77.06% and the silver content of slag is 4.20 g/t.
VL  - 6
IS  - 2
ER  -

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Author Information

Sun Yanwen

BGRIMM Technology Group, Beijing, China
Yuan Chaoxin

BGRIMM Technology Group, Beijing, China
Guo Chihao

BGRIMM Technology Group, Beijing, China
Li Dajiang

BGRIMM Technology Group, Beijing, China
Li Yibin

BGRIMM Technology Group, Beijing, China
Mu Liangzhao

BGRIMM Technology Group, Beijing, China

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Plain Text BibTeX RIS

APA Style

Sun Yanwen, Yuan Chaoxin, Guo Chihao, Li Dajiang, Li Yibin, et al. (2021). Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination. International Journal of Mineral Processing and Extractive Metallurgy, 6(2), 20-23. https://doi.org/10.11648/j.ijmpem.20210602.11

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ACS Style

Sun Yanwen; Yuan Chaoxin; Guo Chihao; Li Dajiang; Li Yibin, et al. Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination. Int. J. Miner. Process. Extr. Metall. 2021, 6(2), 20-23. doi: 10.11648/j.ijmpem.20210602.11

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AMA Style

Sun Yanwen, Yuan Chaoxin, Guo Chihao, Li Dajiang, Li Yibin, et al. Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination. Int J Miner Process Extr Metall. 2021;6(2):20-23. doi: 10.11648/j.ijmpem.20210602.11

Copy | Download

@article{10.11648/j.ijmpem.20210602.11,
  author = {Sun Yanwen and Yuan Chaoxin and Guo Chihao and Li Dajiang and Li Yibin and Mu Liangzhao},
  title = {Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination},
  journal = {International Journal of Mineral Processing and Extractive Metallurgy},
  volume = {6},
  number = {2},
  pages = {20-23},
  doi = {10.11648/j.ijmpem.20210602.11},
  url = {https://doi.org/10.11648/j.ijmpem.20210602.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmpem.20210602.11},
  abstract = {Cyanide tailings produced in gold smelting process contain a large number of heavy metals and cyanides, which are more and more harmful to the environment. In order to reduce environmental pollution, valuable metals from cyanide tailings are recovered. The amount of calcium chloride, chlorination time, the way of adding calcium chloride and other factors on the influence of gold and silver extraction by chlorination were studied by using the raw material of cyanide tailings with melting chlorination process in this paper, and how to reduce the melting chlorination temperature was explored, and a comprehensive experiment was carried out under the best conditions. The results showed that when the chlorination temperature is 1500°C, the chlorination time is 1 h, and the addition amount of CaCl2 is 7%, the volatilization rate of gold is 85.38%, the content of gold in slag is 1.83 g/t, the volatilization rate of silver is 77.36%, and the content of silver in slag is 4.12 g/t; when the chlorination temperature is 1500°C, 7% CaCl2 is added, and the chlorination time is 15 min, the volatilization rate of gold is 87.78%, the content of gold in slag is 1.23 g/t, the volatilization rate of silver is 59.40%, and the content of silver in slag is 7.39 g/t; the addition of 5% CaO can change the slag type, reduce the chlorination temperature by 50~100°C, increase the volatilization rate of gold and silver slightly, and decrease the content of gold and silver in slag; when CaCl2 is added in five times, the volatilization rate of gold increases to 95.53%, the content of gold in slag decreases to 0.56g/t, the volatilization rate of silver increases to 77.80%, and the content of silver in slag decreases to 4.04 g/t; 7% CaCl2 was added in five times, and the melting chlorination time was 15 min. the amount of CaO was 5%, and the melting chlorination temperature was 1450°C, the gold volatilization rate is 95.69%, and the gold content of slag is 0.54 g/t, the silver volatilization rate is 77.06% and the silver content of slag is 4.20 g/t.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - Experiment of Gold and Silver Extraction from Cyanide Tailings by Melting Chlorination
AU  - Sun Yanwen
AU  - Yuan Chaoxin
AU  - Guo Chihao
AU  - Li Dajiang
AU  - Li Yibin
AU  - Mu Liangzhao
Y1  - 2021/05/14
PY  - 2021
N1  - https://doi.org/10.11648/j.ijmpem.20210602.11
DO  - 10.11648/j.ijmpem.20210602.11
T2  - International Journal of Mineral Processing and Extractive Metallurgy
JF  - International Journal of Mineral Processing and Extractive Metallurgy
JO  - International Journal of Mineral Processing and Extractive Metallurgy
SP  - 20
EP  - 23
PB  - Science Publishing Group
SN  - 2575-1859
UR  - https://doi.org/10.11648/j.ijmpem.20210602.11
AB  - Cyanide tailings produced in gold smelting process contain a large number of heavy metals and cyanides, which are more and more harmful to the environment. In order to reduce environmental pollution, valuable metals from cyanide tailings are recovered. The amount of calcium chloride, chlorination time, the way of adding calcium chloride and other factors on the influence of gold and silver extraction by chlorination were studied by using the raw material of cyanide tailings with melting chlorination process in this paper, and how to reduce the melting chlorination temperature was explored, and a comprehensive experiment was carried out under the best conditions. The results showed that when the chlorination temperature is 1500°C, the chlorination time is 1 h, and the addition amount of CaCl2 is 7%, the volatilization rate of gold is 85.38%, the content of gold in slag is 1.83 g/t, the volatilization rate of silver is 77.36%, and the content of silver in slag is 4.12 g/t; when the chlorination temperature is 1500°C, 7% CaCl2 is added, and the chlorination time is 15 min, the volatilization rate of gold is 87.78%, the content of gold in slag is 1.23 g/t, the volatilization rate of silver is 59.40%, and the content of silver in slag is 7.39 g/t; the addition of 5% CaO can change the slag type, reduce the chlorination temperature by 50~100°C, increase the volatilization rate of gold and silver slightly, and decrease the content of gold and silver in slag; when CaCl2 is added in five times, the volatilization rate of gold increases to 95.53%, the content of gold in slag decreases to 0.56g/t, the volatilization rate of silver increases to 77.80%, and the content of silver in slag decreases to 4.04 g/t; 7% CaCl2 was added in five times, and the melting chlorination time was 15 min. the amount of CaO was 5%, and the melting chlorination temperature was 1450°C, the gold volatilization rate is 95.69%, and the gold content of slag is 0.54 g/t, the silver volatilization rate is 77.06% and the silver content of slag is 4.20 g/t.
VL  - 6
IS  - 2
ER  -

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