Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction

Sheng Jianlin; Sun Yin; Zhu Wujin; Zeng Zongjie; Ma Guoqiang; He Hucheng; He Mingdong

doi:doi:10.11648/j.ijmpem.20180303.13

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Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction

Sheng Jianlin, Sun Yin, Zhu Wujin, Zeng Zongjie, Ma Guoqiang, He Hucheng, He Mingdong

Published in International Journal of Mineral Processing and Extractive Metallurgy (Volume 3, Issue 3)

Received: 20 July 2018 Accepted: 15 October 2018 Published: 29 November 2018

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Abstract

The fire assay gravimetry is an old and classical method. It is one of most commonly used and most effective methods for the separation and analysis of precious metals due to strong representativeness, high accuracy and good stability. However, the fire assay gravimetry also has some disadvantages such as long analytical procedure and systemic lower analytical results (especially for silver). If the second or secondary assaying is use, the analytrcal procedure will be longer and the operation cost will be higher. Through the exploration and analysis of the test principle of smelting and ash blowing in the fire test analysis, under the premise of the control test analysis conditions, according to the merging silver content and lead buckle quality of one test gold, theoretically derived The mathematical model for correcting the amount of silver loss during smelting and ash blowing, and then the method of measuring the silver by the fire test weight method combined with the mathematical correction method, can completely eliminate the operation steps of the second test. The content of silver in three representative samples (including crude copper, copper concentrate and copper anode slime) was determined by the experimental method and fire assay-recovery correction method in the experiment. In the latter method, the lost silver in residue and cupel was determined by second fire assaying to obtain the corrected ralue of silver. The results showed that the relative difference between two methods were within ± 0.5%. The relative standard deviation (RSD) of crude copper (n = 11) and copper concentrate (n = 12) with proposed method was 0.9% and 1.2%. In addition, in this article, the optimum lead button mass with various samples and assay ingredient schemes was obtained by higher mathematics derivation, and the lead button mass in national related analysis standards was reasonably and scientifically reviewed.

Published in	International Journal of Mineral Processing and Extractive Metallurgy (Volume 3, Issue 3)
DOI	10.11648/j.ijmpem.20180303.13
Page(s)	65-75
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), 2018. Published by Science Publishing Group

Keywords

Fire Assay, Gravimetry, Ingredient, Smelting, Cupellation, Lead Button Mass, Silver Loss, Mathematic Model, Correction Coefficient

References

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[3]	SHENG Jian-lin. Application of computer in lead-test Gold ingredients [J]. Gold, 1999,11(8):41-45.
[4]	XU Cun-sheng. Practice of fire test analysis work [J]. Gold, 1997, 18 (9): 53-56.
[5]	RONG Sha-sha, Niu Jin. Detailed discussion on the operation of lead gold testing method [J]. Low-carbon world, 2015(25):149-150.
[6]	TANG Wen-hui. The possible errors in the analysis of fire gold and the measures to be taken. [J]. Gold, 1991,12 (6): 62-63.
[7]	XIAO Wen-kang and ZHANG Wen-gang. Error source analysis of the determination of gold and silver content in copper concentrate by fire gold assay [J]. New technology and products of China, 2013(16):159-159.
[8]	JIANG Shui-ying, XIAO Hua yun, WU Sheng-dong, WU Bo, QIN Yun-he. Evaluation of uncertainty of determination of gold content in copper concentrate by fire assay method [J]. Rock ore test, 2008,27(4):299-301.
[9]	YANG Zuo-ge, HE Ming-zhong. Improved the precision and accuracy of Gold determination in copper concentrate [J]. Gold, 2002,23(3):40-43.
[10]	SHENG Jian-lin. Cupellation loss of silver in silver assay and its correction [J]. Chinese Journal of Analysis Laboratory, 1992,11 (4): 66-68.
[11]	CHEN Li-qing, WANG Ping, ZHANG Li-ming. Silver correction by using magnesium sand cupel in pyro-assa-ying [J]. Copper Engineering, 2003(2):73-75.
[12]	SHENG Jian-lin. Research on the effect of ash material on the analysis results [J]. Chinese Journal of Analysis Laboratory, 2009,28 (z1): 282-285.
[13]	MA Li-jun, LI Zheng-xu, ZHONG Yi-nan, KAN Chun-hai, XIAO Qian-peng. Discussion on the influence of impurity elements on the determination of Gold content in crude Gold by fire Gold weight method [J]. Gold, 2017,38(4):73-76.
[14]	JIANG Xin. Analysis of the influence of sample size on the analysis results of gold and silver in copper concentrate by fire gold assay [J]. Science and technology and innovation, 2014(11):7-8.
[15]	ZHANG Meng-jie, HOU Bao-jun, ZHOU Zhi-ming, WU Bai-yang. Effects of different ash blowing temperatures on the detection results of lead fire assay [J]. China test, 2015, 23(4):12-14.
[16]	People's Republic of China State General Administration of quality supervision, inspection and quarantine. SN/T 1789-2006, determination of gold and silver in coarse copper, fire test weight method [S]. Beijing: China Standard Press, 2006.
[17]	People's Republic of China State Administration for quality supervision, inspection and quarantine, China National Standardization Management Committee, GB/T 3884.2- 2012 copper concentrate chemical analysis methods second parts: Determination of gold and silver content, flame atomic absorption spectrometry and fire test method [S].: China Standard Publishing Agency, 2012.
[18]	Department of industry and information technology of People's Republic of China. YS/T 745.2-2010 copper anode slime chemical analysis method: second part: Determination of gold and silver content of fire test gold weight method [S].: China Standard Press, 2010.
[19]	Department of industry and information technology of People's Republic of China. YS/T 521.2-2009 method for chemical analysis of crude copper, part second: Determination of gold and silver, fire test weight method [S]., Beijing: China Standard Press, 2009.

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APA Style

Sheng Jianlin, Sun Yin, Zhu Wujin, Zeng Zongjie, Ma Guoqiang, et al. (2018). Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction. International Journal of Mineral Processing and Extractive Metallurgy, 3(3), 65-75. https://doi.org/10.11648/j.ijmpem.20180303.13

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ACS Style

Sheng Jianlin; Sun Yin; Zhu Wujin; Zeng Zongjie; Ma Guoqiang, et al. Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction. Int. J. Miner. Process. Extr. Metall. 2018, 3(3), 65-75. doi: 10.11648/j.ijmpem.20180303.13

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AMA Style

Sheng Jianlin, Sun Yin, Zhu Wujin, Zeng Zongjie, Ma Guoqiang, et al. Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction. Int J Miner Process Extr Metall. 2018;3(3):65-75. doi: 10.11648/j.ijmpem.20180303.13

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@article{10.11648/j.ijmpem.20180303.13,
  author = {Sheng Jianlin and Sun Yin and Zhu Wujin and Zeng Zongjie and Ma Guoqiang and He Hucheng and He Mingdong},
  title = {Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction},
  journal = {International Journal of Mineral Processing and Extractive Metallurgy},
  volume = {3},
  number = {3},
  pages = {65-75},
  doi = {10.11648/j.ijmpem.20180303.13},
  url = {https://doi.org/10.11648/j.ijmpem.20180303.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmpem.20180303.13},
  abstract = {The fire assay gravimetry is an old and classical method. It is one of most commonly used and most effective methods for the separation and analysis of precious metals due to strong representativeness, high accuracy and good stability. However, the fire assay gravimetry also has some disadvantages such as long analytical procedure and systemic lower analytical results (especially for silver). If the second or secondary assaying is use, the analytrcal procedure will be longer and the operation cost will be higher. Through the exploration and analysis of the test principle of smelting and ash blowing in the fire test analysis, under the premise of the control test analysis conditions, according to the merging silver content and lead buckle quality of one test gold, theoretically derived The mathematical model for correcting the amount of silver loss during smelting and ash blowing, and then the method of measuring the silver by the fire test weight method combined with the mathematical correction method, can completely eliminate the operation steps of the second test. The content of silver in three representative samples (including crude copper, copper concentrate and copper anode slime) was determined by the experimental method and fire assay-recovery correction method in the experiment. In the latter method, the lost silver in residue and cupel was determined by second fire assaying to obtain the corrected ralue of silver. The results showed that the relative difference between two methods were within ± 0.5%. The relative standard deviation (RSD) of crude copper (n = 11) and copper concentrate (n = 12) with proposed method was 0.9% and 1.2%. In addition, in this article, the optimum lead button mass with various samples and assay ingredient schemes was obtained by higher mathematics derivation, and the lead button mass in national related analysis standards was reasonably and scientifically reviewed.},
 year = {2018}
}

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TY  - JOUR
T1  - Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction
AU  - Sheng Jianlin
AU  - Sun Yin
AU  - Zhu Wujin
AU  - Zeng Zongjie
AU  - Ma Guoqiang
AU  - He Hucheng
AU  - He Mingdong
Y1  - 2018/11/29
PY  - 2018
N1  - https://doi.org/10.11648/j.ijmpem.20180303.13
DO  - 10.11648/j.ijmpem.20180303.13
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  - 65
EP  - 75
PB  - Science Publishing Group
SN  - 2575-1859
UR  - https://doi.org/10.11648/j.ijmpem.20180303.13
AB  - The fire assay gravimetry is an old and classical method. It is one of most commonly used and most effective methods for the separation and analysis of precious metals due to strong representativeness, high accuracy and good stability. However, the fire assay gravimetry also has some disadvantages such as long analytical procedure and systemic lower analytical results (especially for silver). If the second or secondary assaying is use, the analytrcal procedure will be longer and the operation cost will be higher. Through the exploration and analysis of the test principle of smelting and ash blowing in the fire test analysis, under the premise of the control test analysis conditions, according to the merging silver content and lead buckle quality of one test gold, theoretically derived The mathematical model for correcting the amount of silver loss during smelting and ash blowing, and then the method of measuring the silver by the fire test weight method combined with the mathematical correction method, can completely eliminate the operation steps of the second test. The content of silver in three representative samples (including crude copper, copper concentrate and copper anode slime) was determined by the experimental method and fire assay-recovery correction method in the experiment. In the latter method, the lost silver in residue and cupel was determined by second fire assaying to obtain the corrected ralue of silver. The results showed that the relative difference between two methods were within ± 0.5%. The relative standard deviation (RSD) of crude copper (n = 11) and copper concentrate (n = 12) with proposed method was 0.9% and 1.2%. In addition, in this article, the optimum lead button mass with various samples and assay ingredient schemes was obtained by higher mathematics derivation, and the lead button mass in national related analysis standards was reasonably and scientifically reviewed.
VL  - 3
IS  - 3
ER  -

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Author Information

Sheng Jianlin

Testing Center of Zhejiang Fuye Group Co, Ltd, Fuyang, China
Sun Yin

Testing Center of Zhejiang Fuye Group Co, Ltd, Fuyang, China
Zhu Wujin

Testing Center of Zhejiang Fuye Group Co, Ltd, Fuyang, China
Zeng Zongjie

Testing Center of Zhejiang Fuye Group Co, Ltd, Fuyang, China
Ma Guoqiang

Testing Center of Zhejiang Fuye Group Co, Ltd, Fuyang, China
He Hucheng

Testing Center of Zhejiang Fuye Group Co, Ltd, Fuyang, China
He Mingdong

Testing Center of Zhejiang Fuye Group Co, Ltd, Fuyang, China

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Plain Text BibTeX RIS

APA Style

Sheng Jianlin, Sun Yin, Zhu Wujin, Zeng Zongjie, Ma Guoqiang, et al. (2018). Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction. International Journal of Mineral Processing and Extractive Metallurgy, 3(3), 65-75. https://doi.org/10.11648/j.ijmpem.20180303.13

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ACS Style

Sheng Jianlin; Sun Yin; Zhu Wujin; Zeng Zongjie; Ma Guoqiang, et al. Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction. Int. J. Miner. Process. Extr. Metall. 2018, 3(3), 65-75. doi: 10.11648/j.ijmpem.20180303.13

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AMA Style

Sheng Jianlin, Sun Yin, Zhu Wujin, Zeng Zongjie, Ma Guoqiang, et al. Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction. Int J Miner Process Extr Metall. 2018;3(3):65-75. doi: 10.11648/j.ijmpem.20180303.13

Copy | Download

@article{10.11648/j.ijmpem.20180303.13,
  author = {Sheng Jianlin and Sun Yin and Zhu Wujin and Zeng Zongjie and Ma Guoqiang and He Hucheng and He Mingdong},
  title = {Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction},
  journal = {International Journal of Mineral Processing and Extractive Metallurgy},
  volume = {3},
  number = {3},
  pages = {65-75},
  doi = {10.11648/j.ijmpem.20180303.13},
  url = {https://doi.org/10.11648/j.ijmpem.20180303.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmpem.20180303.13},
  abstract = {The fire assay gravimetry is an old and classical method. It is one of most commonly used and most effective methods for the separation and analysis of precious metals due to strong representativeness, high accuracy and good stability. However, the fire assay gravimetry also has some disadvantages such as long analytical procedure and systemic lower analytical results (especially for silver). If the second or secondary assaying is use, the analytrcal procedure will be longer and the operation cost will be higher. Through the exploration and analysis of the test principle of smelting and ash blowing in the fire test analysis, under the premise of the control test analysis conditions, according to the merging silver content and lead buckle quality of one test gold, theoretically derived The mathematical model for correcting the amount of silver loss during smelting and ash blowing, and then the method of measuring the silver by the fire test weight method combined with the mathematical correction method, can completely eliminate the operation steps of the second test. The content of silver in three representative samples (including crude copper, copper concentrate and copper anode slime) was determined by the experimental method and fire assay-recovery correction method in the experiment. In the latter method, the lost silver in residue and cupel was determined by second fire assaying to obtain the corrected ralue of silver. The results showed that the relative difference between two methods were within ± 0.5%. The relative standard deviation (RSD) of crude copper (n = 11) and copper concentrate (n = 12) with proposed method was 0.9% and 1.2%. In addition, in this article, the optimum lead button mass with various samples and assay ingredient schemes was obtained by higher mathematics derivation, and the lead button mass in national related analysis standards was reasonably and scientifically reviewed.},
 year = {2018}
}

Copy | Download

TY  - JOUR
T1  - Determination of Silver by Fire Assay Gravimetry Combined with Mathmetic Correction
AU  - Sheng Jianlin
AU  - Sun Yin
AU  - Zhu Wujin
AU  - Zeng Zongjie
AU  - Ma Guoqiang
AU  - He Hucheng
AU  - He Mingdong
Y1  - 2018/11/29
PY  - 2018
N1  - https://doi.org/10.11648/j.ijmpem.20180303.13
DO  - 10.11648/j.ijmpem.20180303.13
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  - 65
EP  - 75
PB  - Science Publishing Group
SN  - 2575-1859
UR  - https://doi.org/10.11648/j.ijmpem.20180303.13
AB  - The fire assay gravimetry is an old and classical method. It is one of most commonly used and most effective methods for the separation and analysis of precious metals due to strong representativeness, high accuracy and good stability. However, the fire assay gravimetry also has some disadvantages such as long analytical procedure and systemic lower analytical results (especially for silver). If the second or secondary assaying is use, the analytrcal procedure will be longer and the operation cost will be higher. Through the exploration and analysis of the test principle of smelting and ash blowing in the fire test analysis, under the premise of the control test analysis conditions, according to the merging silver content and lead buckle quality of one test gold, theoretically derived The mathematical model for correcting the amount of silver loss during smelting and ash blowing, and then the method of measuring the silver by the fire test weight method combined with the mathematical correction method, can completely eliminate the operation steps of the second test. The content of silver in three representative samples (including crude copper, copper concentrate and copper anode slime) was determined by the experimental method and fire assay-recovery correction method in the experiment. In the latter method, the lost silver in residue and cupel was determined by second fire assaying to obtain the corrected ralue of silver. The results showed that the relative difference between two methods were within ± 0.5%. The relative standard deviation (RSD) of crude copper (n = 11) and copper concentrate (n = 12) with proposed method was 0.9% and 1.2%. In addition, in this article, the optimum lead button mass with various samples and assay ingredient schemes was obtained by higher mathematics derivation, and the lead button mass in national related analysis standards was reasonably and scientifically reviewed.
VL  - 3
IS  - 3
ER  -

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