Use of Electrolytic Zinc Powder for Cementation of Gold from Cyanide Solutions

Metallurgist ◽  
2018 ◽  
Vol 62 (5-6) ◽  
pp. 456-463 ◽  
Author(s):  
S. A. Yakornov ◽  
K. D. Naumov ◽  
V. G. Lobanov ◽  
P. A. Kozlov ◽  
Ya. D. Zelyakh ◽  
...  
Keyword(s):  
Zinc Powder ◽  
Electrolytic Zinc ◽  
Cyanide Solutions

scholarly journals Features of gold cementation in percolation mode by electrolytic zinc powders

2020 ◽  
pp. 19-26
Author(s):  
K. D. Naumov ◽  
V. G. Lobanov
Keyword(s):  
Particle Size ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Fine Powder ◽  
Zinc Powder ◽  
Gold Deposition ◽  
Electrolytic Zinc ◽  
Zinc Powders ◽  
Cyanide Solutions

The study covers physicochemical features of dendritic zinc powders and their effect on gold cementation from cyanide solutions. Three zinc powders were obtained in a laboratory environment by electroextraction at different conditions, and these powders featured various particle size and specific surface area. The properties of zinc powders obtained and powder currently used for gold cementation were evaluated using SEM (Jeol JSM-6390LA), BET (Gemini VII 2390) and laser diffraction (Sympatec HELOS & RODOS) methods. It is shown that electrolytic powders have high specific surface area (1.3–2.6 times more) and a low bulk density (3.1–3.8 times less), relative to zinc powder currently used for gold cementation. It was found that due to specific physical properties electrolytic powders have low hydraulic resistance, which eliminates the need for inert additives introduced during cementation, increases unit capacity and reduces the load on equipment. Inert additives elimination will additionally increase the gold content in the resulting product. The dendritic morfology of zinc powders obtained compensates high particle size resulting in the high efficiency of gold precipitation. At the long cementation cycle the effective gold deposition area (with gold extraction of more than 97 %) turned out to be shorter for electrolytic powder compared to fine powder currently used. However, in practice, the cementation cycle is always limited by fine powder throughput and it is not possible to achieve the full zinc potential. The resulting cementation product usually contains 25–35 % of unused zinc. These studies show the effectiveness of using electrolytic zinc powder for gold cementation from cyanide solutions.

Production of electrolytic zinc powder from zinc anode casing of spent dry cell batteries

2015 ◽  
Vol 157 ◽  
pp. 60-71 ◽  
Author(s):  
Ashour Owais ◽  
Mohamed Abdel Hady Gepreel ◽  
Essam Ahmed
Keyword(s):  
Zinc Powder ◽  
Zinc Anode ◽  
Electrolytic Zinc ◽  
Dry Cell

The effect of cyanide and lead ions on the cementation rate, stoichiometry and morphology of silver in cementation from cyanide solutions with zinc powder

2005 ◽  
Vol 76 (3-4) ◽  
pp. 193-205 ◽  
Author(s):  
G. Viramontes Gamboa ◽  
M. Medina Noyola ◽  
A. López Valdivieso
Keyword(s):  
Zinc Powder ◽  
Lead Ions ◽  
Cyanide Solutions

High-Power Alkaline Zn-MnO2 Batteries Using γ-MnO2 Nanowires/Nanotubes and Electrolytic Zinc Powder

2005 ◽  
Vol 17 (22) ◽  
pp. 2753-2756 ◽  
Author(s):  
F. Y. Cheng ◽  
J. Chen ◽  
X. L. Gou ◽  
P. W. Shen
Keyword(s):  
High Power ◽  
Zinc Powder ◽  
Electrolytic Zinc ◽  
Mno2 Nanowires

Characteristics of electrolytic zinc powder produced from zinc dross

1979 ◽  
Vol 24 (2) ◽  
pp. 245-250 ◽  
Author(s):  
I.F. Hewaidy ◽  
H.O. Sabra ◽  
E.H. Nassif
Keyword(s):  
Zinc Powder ◽  
Electrolytic Zinc ◽  
Zinc Dross

scholarly journals Technogenic Zinc Usage Possibilities Investigation for Gold Cementation

2017 ◽  
Vol 2 (2) ◽  
pp. 28
Author(s):  
Naumov K.D. ◽  
Lobanov V.G. ◽  
Zelyah Y.D. ◽  
Yakornov S.A. ◽  
Skopin D.Y.
Keyword(s):  
Zinc Content ◽  
Zinc Powder ◽  
Alkaline Solutions ◽  
Technological Properties ◽  
Hydrometallurgical Processing ◽  
Ferrous Metals ◽  
High Zinc ◽  
Zinc Powders ◽  
Cyanide Solutions

<p>Industrial dusts with high zinc content are formed in nonferrous and ferrous metals metallurgy. Hydrometallurgical processing of such dusts can be used. In this case, alkaline solutions with high impurities content are formed. It is possible to produce zinc powder with different technological properties by electroextraction from mentioned alkaline solutions. This work describes investigation of zinc powders usage possibilities to gold cementation from cyanide solutions.</p>

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