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Extraction of gold from boulangerite ore using sodium cyanide

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Title: Extraction of gold from boulangerite ore using sodium cyanide

Authors: Sajjad Ali, Muhammad Hashim, A Ahmad, Y Iqbal

Journal: Journal of the Pakistan Institute of Chemical Engineers

HEC Recognition History
Category From To
Y 2023-07-01 2024-09-30
Y 2022-07-01 2023-06-30
Y 2021-07-01 2022-06-30
Y 2020-07-01 2021-06-30
Z 2018-05-11 2020-06-30
Y 2011-05-16 2018-05-10

Publisher: Pakistan Institute of Chemical Engineers

Country: Pakistan

Year: 2019

Volume: 47

Issue: 2

Language: English

Keywords: Extractionsodium cyanideboulangerite orehydrometallurgy

Categories
Metallurgy (544) Mining Engineering (399) Hydrometallurgy (7) Chemical Engineering (4680) Extraction Technology (31)

Abstract

Present study focuses over the extraction of gold via sodium cyanide (NaCN) from boulangerite ore. Since the presence of antimony hinders the extraction of gold by cyanidation therefore, the ore was first treated with sodium sulphide (Na2S) and sodium hydroxide (NaOH) to remove/minimize the antimony content. Gold extraction via cyanidation was then studied for different parameters including concentration of NaCN, time effect and influence of temperature on leaching of gold. It was observed that extraction of gold increases with increase in concentration of NaCN and ore amount. Maximum leaching of gold (52.89 - 76.53 %) was carried out at 80 oC, 100 minutes leaching time, 300 rpm and a pH level of 10.5.

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