The pretreatment of carbonaceous material in double refractory gold ores DRGO is necessary to decrease preg robbing of gold and maximize gold recovery
The effect of ultrasonic energy on the pretreatment and leaching of gold from the refractory ore was investigated Firstly the refractory ore was pretreated with sodium hydroxide under ultrasound
A study was carried out to process a sulfide mineral concentrate from Norwest of Mexico containing 97 g/t Au % Cu and 15% Fe An oxidative acid pretreatment was investigated using ferric sulfate as oxidant followed by leaching of gold with sodium cyanide Scanning electron microscopy SEM EDS and X ray diffraction XRD the analysis confirms
Nitric Acid Pretreatment Applied to a Refractory Gold‑Tellurides Ore Carlos Argumedo‑Jimenez 1 · Dairo E Chaverra 1 · Oscar J Restrepo‑Baena 1 Received 28 February 2023 / Accepted 23
Zhang et al studied gold telluride ores which are impor tant gold refractory ores due to the presence of suldes and other gangue materials For the conventional cyanide leaching process they found that pretreatment such as oxi dation is required to achieve high gold recovery [8 ] Zhong et al studied the leaching of pyrite with gold
condition for the leaching process of refractory gold ore with the change in the concentration of Ca OCl 2 as the main oxida tive agent pH of the solution and NaCl molar amount as an additive reagent 2 Material and Methods The gold ore samples were obtained from Selinsing Gold Mine in Peninsular Malaysia The samples were pre
The pretreatment of gold ores before cyanidation is a challenging problem due to the world s annual huge waste of refractory gold minerals Generally the leaching of gold by cyanidation without any pre oxidation causes an extraction lower than 90% In recent decades a variety of treatment and pretreatment methods have been used to increase the recovery of
The BIOX® process for the treatment of refractory gold concentrates has been in commercial operation for 35 years following the commissioning of the first plant at the Fairview Gold Mine in South Africa in 1986 To date 12 successful BIOX plants have been constructed in 10 countries with the 13th nearing completion in Zimbabwe
Due to the substantial reduction in the availability of high grade gold mines there has been a growing interest in recovering gold from refractory ores which account for approximately one third of the overall gold production from natural resources Asamoah 2021; Gui et al 2023; Qin et al 2021 Sulfidic ores also known as refractory ores RO are typically
Double refractory gold ores such as Barrick s Goldstrike ore contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching
Due to the substantial reduction in the availability of high grade gold mines there has been a growing interest in recovering gold from refractory ores which account for approximately one third of the overall gold production from natural resources Asamoah 2021; Gui et al 2023; Qin et al 2021 Sulfidic ores also known as refractory ores RO are typically
Improved gold and silver extraction from a refractory antimony ore by pretreatment with alkaline sulphide leach Oktay Celep İbrahim Alp⁎ Hacı Deveci Department of Mining Engineering
DOI / Corpus ID 93717030; Influence of potassium hydroxide pretreatment on the extraction of gold and silver from a refractory ore article{Alp2014InfluenceOP title={Influence of potassium hydroxide pretreatment on the extraction of gold and silver from a refractory ore} author={İbrahim Alp and Oktay Celep and
DOI / Corpus ID 259677822; Oxidative pretreatment of refractory gold ore using persulfate under ultrasound for efficient leaching of gold by a novel eco friendly lixiviant Demonstration of the effect of particle size and economic benefits
Analysis and Pretreatment of Arsenic Bearing Refractory Gold Concentrate Guangsheng Li Xingfu Zhu Mingming Cai Chao Xu and Juntong Zhang China Gold Industry 2021; Leietal 2021 The gold concentrate contains arsenic and carbon is complex and For arsenic containing refractory gold ore the main research methods include roasting
One of the refractory gold ores is the sulfide gold ore which is characterized by the fact that gold is mainly encapsulated by arsenopyrite and pyrite in the form of microscopic or sub microscopic resulting in the gold cannot effectively contact with the leaching agent Qin et al 2021 Wang et al 2020a Wang et al 2020b Therefore in
Carbon arsenic bearing gold ore is a typical complex refractory gold resource Traditionally xanthate was often used as a flotation agent to separate gold minerals But in this paper in order to reduce the cost of the agent kerosene was used as an auxiliary collector and the gold grade and recovery rate were increased by about 10 g/t and % respectively
In this study A novel method for gold recovery from refractory gold ore was proposed with the purpose of improving recovery efficiency of gold and reducing environmental pollution
DOI / Corpus ID 95526481; Improved gold and silver extraction from a refractory antimony ore by pretreatment with alkaline sulphide leach article{Celep2011ImprovedGA title={Improved gold and silver extraction from a refractory antimony ore by pretreatment with alkaline sulphide leach} author={Oktay Celep and İbrahim
A sodium hydroxide pretreatment at ambient temperature was evaluated to increase gold extraction from a high grade arsenopyrite mineral A 2 k factorial experimental design was established with the following variables NaOH concentration 3 M solid concentration 40 200 g/L and treatment time 6 48 h After applying the pretreatment
DOI / Corpus ID 259698283; Selective alkaline leaching of antimony from Low grade refractory gold ores and process optimization article{Zhang2023SelectiveAL title={Selective alkaline leaching of antimony from Low grade refractory gold ores and process optimization} author={Feiyu Zhang and Ya ru Cui and Xihong
This paper presents the results obtained by processing a gold and silver telluride mineral concentrate from a mine in Colombia An acid wash also known as acidification was carried out followed by oxidation with nitric acid as a pretreatment Cyanidations of the pretreatment residues were carried out and the results were compared with results from
The technological mineralogy of a gold deposit located in North Western province of Zambia was carried out by using X ray fluorescence spectroscopy XRF X ray diffraction spectroscopy XRD and scanning electron microscope SEM The results showed that gold was highly dispersed in gold bearing minerals such as pyrite arsenopyrite and some gangues in
DOI / Corpus ID 259677822; Oxidative pretreatment of refractory gold ore using persulfate under ultrasound for efficient leaching of gold by a novel eco friendly lixiviant Demonstration of the effect of particle size and economic benefits
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