CN102560138A - Pretreatment method of refractory gold ore ...

The invention discloses a pretreatment method of refractory gold ore, which is characterized by comprising the following steps of: adopting a dry-wet two-level ball grinder activating and impregnation process; carrying out first-level dry grinding by adopting a vibratory ball grinder and efficiently improving the mineral activity on the basis of energy conservation through adjusting the ...

Improved gold and silver extraction from a refractory ...

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 ...

refractory ore gold and pretreatment - residence-archambeau.be

refractory ore gold and pretreatment; refractory ore gold and pretreatment. refractory ore gold and pretreatment. álogo de fabricantes de Filtro De Cerámica Porosa de alta . Espuma porosa filtros cerámicos para fundición de metal. US $1-100 / Unidad. 1 Unidad/es (Pedido mínimo). 4 YRS Honesty Refractory.

Effect of Pretreatment of Sulfide Refractory Concentrate ...

Many of the gold deposits contain finely disseminated gold in iron sulfide minerals such as pyrite and arsenopy- rite. Such deposits are called refractory gold ores due to the encapsulation of fine particles of gold in the ore host. A clear boundary between refractory and non-refractory ore in terms of gold recovery is not well defined, but

pretreatment of refractory ores prior to gold leaching

Pre-treatment of a refractory gold sulfide ore by means of - SciELO. Abstract Cyanidation is a relatively simple and cheap technology to treat Biological oxidation (biooxidation) as pre-treatment of refractory gold ores is based on the Before inoculation, sulfuric acid consumption was 67.5 g H2SO4/kg ore

Developments in the pretreatment of refractory gold ...

Developments in the pretreatment of refractory gold minerals by nitric acid D.-X. LI College of Environmental Science and Engineering, China The paper covers many literature reports of processes using nitrogenous species as an oxidant for processing refractory gold ores, especially development in the pretreatment of refractory gold

Recovery Refractory Resources - sgs.com

most common pre-treatment options, and speaks to some companies that offer or use the processes A refractory gold ore is gold-containing ore that is resistant to recovery by direct cyanidation and carbon adsorption processes. More specifically, it is an ore that has a gold recovery rate of less than 80% when direct cyanidation is applied to it.

acidic pretreatment of gold refractory ore processing

refractory gold ore and pretreatment mining equipment . ore mining process for gold ore high performance. Aug 20 2018nbsp018332Refractory gold ore pretreatment Treatment of refractory gold ore (whole ore and flotation concentrates) has become more prominent since the 1980s with many gold discoveries often including ores that are wholly or partially refractory.

Gold Sulphide Ore Oxidation by Alkaline Pressure

carbonaceous matter (CM), the ore is said to be double refractory (Nyavor and Egiebor, 1992). In such ores, gold particles may sometimes be occluded or included in the sulfide minerals and pretreatment is necessary to decompose the mineral structure to liberate gold for …

Microwave pretreatment of a double refractory gold ore

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.

refractory ore gold and pretreatment - essentialgap.co.za

Improved gold and silver extraction from a refractory antimony ore by pretreatment with alkaline sulphide leach Oktay Celep, İbrahim Alp⁎, Hacı DeveciTreatment of copper-rich gold ore by cyanide … The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal ...

The reasons of gold refractory, Gold ore classification ...

Nov 28, 2016· The reason of the gold mineral refractory There are so many types of reasons that caused the difficulty of gold ore processing, including physical element, chemical element, and mineralogical element.

Gold extraction - Wikipedia

A "refractory" gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. These refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold.

acidic pretreatment of gold refractory ore processing

Leaching of a gold bearing partially roasted sulphide... An usual approach for processing complex refractory gold ores is a pre-...Pressure oxidation is a technology where sulfuric acid can play an …

refractory ore gold and pretreatment - elthamlodge.co.za

refractory ore gold and pretreatment 2012 – Grinding . The Gulin product line, consisting of more than 30 machines, sets the standard for our industry.

Gold mineral processing - Hatch Ltd

Refractory gold ore pretreatment Treatment of refractory gold ore (whole ore and flotation concentrates) has become more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory. Refractory pre-treatment processes include pressure oxidation, biological oxidation and various forms of ...

refractory ore gold and pretreatment - vph-picture.eu

Gold ore which is difficult to concentrate often referred to gold or refractory gold ore, which use conventional cyanide process cannot effectively extract most of the gold ore Therefore, it is commonly said that the treatment of gold is the case of the cyanide method

pretreatment of sulfide gold ores - tcfuwhr.org

Chloride-hypochlorite oxidation and leaching of refractory sulfide . In this research, oxidation of sulfide minerals and leaching of gold from a Keywords: refractory gold ore, oxidative pretreatment, noncyanide leaching.

Refractory Gold Ore Treatment Methods

Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and …

Review Pretreatment Process on Refractory Gold Ores with As

mainly about the refractory gold leaching easily through arsenic removal to expose gold, changing the composition, physic-chemical and electro-chemical properties of the ore. Currently, there are four main methods of pretreatments of refractory gold ores with As. Pretreatment options for deal-ing with refractory gold ores are illustrated in Fig ...

pretreatment of refractory ores in gold leaching process congo

Refractory gold ore pretreatment Treatment of refractory gold ore (whole ore and flotation concentrates) has become more prominent since the 1980s, with many gold discoveries often including ores that are wholly or partially refractory. Pretreatment Of Refractory Ores In Gold …

Pretreatment Process on Refractory Gold Ores with As

Jun 24, 2017· The problem of the refractory nature of gold bearing arsenide ores is described. The basic principle, characteristics and application of pretreatment technique of arsenic-bearing gold ores are presented in this paper. Several different classes of process options for pretreating refractory ores …

The Application of Roasting Pretreatment for Antimonial ...

B12 THE APPLICATION OF ROASTING PRETREATMENT FOR ANTIMONIAL REFRACTORY GOLD AND SILVER ORES O Celep1, I Alp2 and H Deveci3 ABSTRACT The Akoluk ore deposit is located in southwest of Ordu city (Turkey) and in the western part of the Eastern Pontides, which consists mainly of volcanic-sedimentary rock units.

ALTA Gold 2012 E-Doc - albionprocess.com

A significant contemporary challenge for gold mining companies is to define economic process options for treating more complex ore bodies as the less refractory ores become depleted. Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves.

acidic pretreatment of gold refractory ore processing

For double refractory gold ores, the most crucial unit operation is performed by the roaster by creating a high temperature oxidation of the ore. ..... roasting lies in the process for a typical gold operation using oxidative pretreatment. .... process, and organic acids with functional groups that have an ability to disrupt the gold...

Controlling SO2 emissions in the roasting of gold concentrate

Acid pressure oxidation is generally believed to be the most effective pretreatment for refractory sulfide gold ores and concentrates, although it is ineffective for some ores. For such ores and concentrates (usually those containing both carbonaceous and sulfide materials), roasting remains the most effective pretreatment before cyanidation.

Pretreatment of a refractory arsenopyritic gold ore using ...

Gold ores are catalogued as refractory if the extraction by direct cyanidation is less than 80%. With the cyanide bottle roll for the mineral concentrate, the gold recovery was only 23%, clearly indicating the refractoriness of this arsenopyritic gold ore.

ECONOMICS OF REFRACTORY GOLD ORE PROCESSES

Refractory gold ores present a number of problems to the gold producer. Much has been written about the suitability of particular pretreatment processes for specific gold ores. We at Hazen Research have had the opportunity to participate in the development and application of a number of gold ore processes and to review others'