Celep 11 Implementation Of Naoh Pretreatment For Refractory

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Implementation of sodium hydroxide pretreatment for ...

01-06-2011· Alkaline pretreatment of a refractory gold–silver ore containing antimony minerals such as stibnite, andorite (Sb 3 PbAgS 6) and zinkenite (Pb 9 Sb 22 S 42) was tested using sodium hydroxide in order to determine its effectiveness in improving the recovery of gold and silver.Mineralogical investigations show that silver was present as andorite and Au/Ag alloy.

Implementation of sodium hydroxide pretreatment for ...

Oktay Celep and co-authors implemented sodium hydroxide pretreatment for refractory antimonial gold and silver ores. 19) They indicated that the extraction ratio of gold Fig. 4.

Influence of potassium hydroxide pretreatment on the ...

01-05-2014· We have shown that alkaline sulphide leaching is an effective pretreatment method ahead of cyanide leaching for the extraction of gold and silver from antimonial refractory ores containing sulphide minerals such as zinkenite (Pb 9 Sb 22 S 42) and andorite (Sb 3 PbAgS 6) (Alp et al., 2010, Celep et al., 2011a).

Implementation of Sodium Hydroxide Pretreatment for ...

Implementation of Sodium Hydroxide Pretreatment for Refractory Antimonial Gold and Silver Ores 2011 Hydrometallurgy - Free download as PDF File (.pdf), Text File (.txt) or read online for free.

Celep 11 - Improved Gold and Silver Extraction From a ...

Celep 11 - Improved Gold and Silver Extraction From a Refractory Antimony Ore by Pretreatment With Alkaline Sulphide Leach - Free download as PDF File (.pdf), Text File (.txt) or read online for free. pre-tratamientos con hidróxido de sodio para mejorar la lixiviacion y obtención de plata

Pretreatment of a refractory arsenopyritic gold ore using ...

01-03-2015· Celep et al., 2011a, Celep et al., 2011b and Alp et al. (2014) increased silver and gold extraction, in a subsequent cyanidation from a refractory antimony ore, using an alkaline pretreatment with Na 2 S and NaOH (2011a), NaOH (2011b) and KOH (2014), achieving up to 94% silver extraction and 87% of the gold with 86% antimony removal for the KOH case.

Influence of potassium hydroxide pretreatment on the ...

23-07-2020· Celep et al. (2011a,b) and Alp et al. (2014) increased silver and gold extraction, in a subsequent cyanidation from a refractory antimony ore, using an alkaline pretreatment with Na 2 S and NaOH ...

The development of a caustic pre-leaching step for the ...

01-06-2018· Alp et al., 2010, Celep et al., 2011a, Celep et al., 2011b indicated that gold losses (up to 13%) occur when pre-treating antimonial refractory ore with a mixture of Na 2 S and NaOH with the losses increasing at high temperatures and high concentrations of sulphide.

Improved gold and silver extraction from a refractory ...

01-01-2011· The pretreatment of an antimonial refractory gold and silver ore was investigated using alkaline sulphide leaching. The ore assayed 20 g/t Au and 220 g/t Ag and contained predominantly quartz/clay and barite, and to a lesser extent, sulphides such as pyrite, stibnite, sphalerite, zinkenite (Pb 9 Sb 22 S 42) and andorite (Sb 3 PbAgS 6).The latter mineral was identified to be the most important ...

(PDF) The Application of Roasting Pretreatment for ...

The Application of Roasting Pretreatment for Antimonial Refractory Gold and Silver Ores. ... were leached by adjusting to pH 10.5 with NaOH ... 11.50 min for grinding time, ...

Implementation of Sodium Hydroxide Pretreatment for ...

Implementation of Sodium Hydroxide Pretreatment for Refractory Antimonial Gold and Silver Ores 2011 Hydrometallurgy - Free download as PDF File (.pdf), Text File (.txt) or read online for free.

refractory ore gold and pretreatment - dinykoekoek.nl

refractory ore gold and pretreatment shaheenpublicschool. The gold ore must be pretreated to oxidize sulfide minerals associated with for the pretreatment of refractory ores are roasting, high or low pressure oxidation, Get Now A two stage bacterial pretreatment process for double refractory …

Precious Metals Extraction Research Summary Alkaline ul e ...

ing for the extraction of Ag.12,13 Celep et al. reported that pretreatment ... Pretreatment of refractory ores is a prerequisite to ... NaOH) on the pretreatment process

Celep 11 - Improved Gold and Silver Extraction From a ...

Celep 11 - Improved Gold and Silver Extraction From a Refractory Antimony Ore by Pretreatment With Alkaline Sulphide Leach - Free download as PDF File (.pdf), Text File (.txt) or read online for free. pre-tratamientos con hidróxido de sodio para mejorar la lixiviacion y obtención de plata

Influence of potassium hydroxide pretreatment on the ...

23-07-2020· Celep et al. (2011a,b) and Alp et al. (2014) increased silver and gold extraction, in a subsequent cyanidation from a refractory antimony ore, using an alkaline pretreatment with Na 2 S and NaOH ...

Optimizing the alkaline oxidation pretreatment of a ...

28-09-2018· Celep O, Alp İ, Paktunç D and Thibault Y 2011 Implementation of sodium hydroxide pretreatment for refractory antimonial gold and silver ores Hydrometallurgy 108 109–14 Crossref Google Scholar [11]

Alkaline leaching of antimony from natural stibnite - Rudy ...

The paper is an overview of alkaline leaching of stibnite by mixed Na2S + NaOH or by NaOH leaching solutions. The behaviour of minor constituents, such as mercury, ... Celep O. et al.: Implementation of sodium hydroxide pretreatment for refractory antimonial gold and silver ores.

Ultrasound-intensified Leaching of Gold from a Refractory …

Oktay Celep and co-authors implemented sodium hydroxide pretreatment for refractory antimonial gold and silver ores. 19) They indicated that the extraction ratio of gold was improved from 49.3% to 85.4% after pretreated for 120 min with 3 mol/L NaOH at 80°C.

Improved gold and silver extraction from a refractory ...

Improved gold and silver extraction from a refractory antimony ore by pretreatment - Hydrometallu...

(PDF) Improved gold and silver extraction from a ...

PDF | On Nov 8, 2013, Oktay Celep and others published Improved gold and silver extraction from a refractory antimony ore by pre-treatment with alkaline sulphide leach, Hydrometallurgy, 105, 3-4 ...

Celep 11 - Improved Gold and Silver Extraction From a ...

Celep 11 - Improved Gold and Silver Extraction From a Refractory Antimony Ore by Pretreatment With Alkaline Sulphide Leach - Free download as PDF File (.pdf), Text File (.txt) or read online for free. pre-tratamientos con hidróxido de sodio para mejorar la lixiviacion y obtención de plata

Ultrasound-intensified Leaching of Gold from a Refractory Ore

pretreatment. Oktay Celep and co-authors implemented sodium hydrox-ide pretreatment for refractory antimonial gold and silver ores.19) They indicated that the extraction ratio of gold Fig. 3. Effect of the ultrasound time on the morphology of the ore sample when the NaOH concentration is 15%. a) the original ore, b) 1 h, c) 3 h, d) 5 h. Fig. 4.

Improved gold and silver extraction from a refractory ...

Improved gold and silver extraction from a refractory antimony ore by pretreatment - Hydrometallu...

Characterization of refractory behaviour of complex gold ...

A suitable pretreatment process is often required to overcome the refractoriness and render the gold accessible to the lixiviant action of cyanide and oxygen [4]. Roasting, pressure oxidation, biooxidation, ultrafine grinding and modified cyanidation are the pretreatment methods currently practiced for refractory gold ores and concentrates[5−6].

Alkaline sulfide pretreatment of an antimonial refractory ...

Alkaline sulfide pretreatment of an antimonial refractory Au-Ag ore for improved cyanidation This paper presents the alkaline sulfide pretreatment of an antimonial refractory gold and silver ore. In the ore, gold occurs mainly as gold-silver alloys and as associated with quartz and framboidal pyrite grains, and, to a small extent, as the inclusions within antimonial sulfides.

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Characterization of an iron oxy/hydroxide(gossan type)bearing refractory gold and silver ore by diagnostic leaching Oktay CELEP,Vedat SERBEST Hydromet B&PM Group,Division of Mineral&Coal Processing,Department of Mining Engineering, Karadeniz Technical University,Trabzon61080,Turkey Received18August2014;accepted10December2014

Doç.Dr. OKTAY CELEP | AVESİS

A Preliminary Study on Nitric Acid Pre-treatment of Refractory Gold/silver Ores CELEP O. , YAZICI E. Y. , DEVECİ H. 25th International Mining Congress and Exhibition of Turkey (IMCET), Antalya, Türkiye, 11 - 14 Nisan 2017, ss.463-468

ehow extracting gold with sodium hydroxide

Implementation of sodium hydroxide pretreatment for refractory antimonial gold and silver ores ... Sep 13, 2013· As it is the sodium hydroxide (NaOH) in the bleach keeping its pH over 12, and sodium hydroxide is a base, we need an acid to neutralize the base.

Karadeniz Teknik Üniversitesi Akademik Bilgi Sistemi

Alp İ., Celep O., Paktunc D., Thibault Y., "Influence of potassium hydroxide pretreatment on the extraction of gold and silver from a refractory ore", HYDROMETALLURGY, vol.146, pp.64-71, 2014 Celep O., Yazici E.Y., "Ultra Fine Grinding Of Silver Plant Tailings Of Refractory Ore Using Vertical Stirred Media Mill", TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, vol.23, …

Impacts of Chemical-Assisted Thermal Pretreatments on ...

pretreatment methods in the literature [3,5,14–17]. In this study, it was proposed to combine the cost-e ective integrated process of chemical-assisted thermal pretreatment and anaerobic digestion for the improvement of methane production from FVHW. The impacts of sodium hydroxide (NaOH) and hydrochloric acid (HCl) assisted thermal pretreatment