in refractory ore types

Gold extraction - Wikipedia

OverviewRefractory gold processesHistoryTypes of oreConcentrationLeachingGold smeltingGold refining and parting

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. A refractory ore generally contains sulfide minerals, organic carbon, or both. Sulfide minerals are impermeable minerals that occlude gold particles, making it difficult for the leach s

China Vertical Type Vertical Shaft Oven Of Lead Ore

Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a Blast furnaces are used to produce pig iron from iron ore for subsequent. Schematic diagram of modern blast furnace (right) and hot-blast stove (left). The hearth and bosh are thick

Refractory ore chemistry Britannica

Other articles where Refractory ore is discussed: gold processing: Extraction from refractory ores: Many gold-bearing ores and concentrates are not readily amenable to cyanidation, owing to the presence of substances that consume the cyanide reagent before it can dissolve the gold, preferentially adsorb the gold as it dissolves (a phenomenon called preg-robbing), or completely surround the

The process mineralogy of gold: The classification of ore ...

The main causes of refractory gold ores are submicroscopic gold, the Au-Ag tellurides, and very fine-grained gold (<10 µm) locked in sulfides. Other types of problem gold ores include copper-gold ores and preg-robbing carbonaceous ores. This is a preview of subscription content, log in to check access.

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

Pyrite, Arsenical pyrite, realgar, orpiment, and Arsenic antimony sulfur gold ore The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite.

Types Of Refractories - Different 10 Types of Refractories

Silica refractory products consist of 93% silica. They are the most widely used high-temperature refractory bricks. They are acidic refractories, they resist acidic slag attack but attacked by basic slags. Depending on the final we can two final products.

(PDF) Cyanidation of Refractory Gold Ores: A Review

Th ese types o fgoldmineralisation are referred ... the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1 ...

Establishing thE ProcEss MinEralogy of gold orEs

Refractory ores are defined as those that give low gold recoveries or give acceptable gold recoveries only with the use of significantly more reagents or more complex pre-treatment processes. Based on the mineralogical characteristics and mineral processing techniques required, gold ores can be classified into 11 types (Table 1).

Refractory - Wikipedia

Refractory materials. Refractory materials must be chemically and physically stable at high temperatures. Depending on the operating environment, they must be resistant to thermal shock, be chemically inert, and/or have specific ranges of thermal conductivity and of the coefficient of thermal expansion.. The oxides of aluminium (), silicon and magnesium are the most important materials used

Types of Refractory Materials and Their Applications

26.10.2015 Alumina refractories containing more than 45% alumina are generally termed as high alumina materials. The alumina concentration ranges from 45 to 95%. Commonly used refractory are sillimanite...

Types Of Refractories - Different 10 Types of Refractories

Silica refractory products consist of 93% silica. They are the most widely used high-temperature refractory bricks. They are acidic refractories, they resist acidic slag attack but attacked by basic slags. Depending on the final we can two final products.

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

Pyrite, Arsenical pyrite, realgar, orpiment, and Arsenic antimony sulfur gold ore The most of refractory ore is gold bearing sulfide. Sulfide iron ore includes many kinds of pyrite and arsenopyrite.

(PDF) Cyanidation of Refractory Gold Ores: A Review

Th ese types o fgoldmineralisation are referred ... the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32 ppm Au, 1 ...

Refractory and Non-Refractory Ore - Gold Companies

Non-refractory ore is where cyanide can be used to extract the gold. This is desirable as it means the process will be cheaper. Refractory and Non-refractory are relative terms, and the degree to which any ore is amenable to cyanide extraction will range from near 0% through to near 100%. Whether gold is refractory or non-refractory has a huge bearing on a potential mine's viability. A deposit ...

Refractory Gold Mining SGS

The other parameter that SGS experts consider when designing refractory gold treatments is whether or not to preconcentrate the gold-bearing ore. This is usually done by flotation of arsenopyrite, pyrite, or other gold-bearing sulfides. To be economically justifiable, preconcentration should meet two objectives. First, the gold recovery to the concentrate should be sufficiently high that the ...

Calcined Ore - refractorysupplier

Because of the different calcined ore properties, the chemical reaction is not same, so the calcining principle is not same. According to the chemical reaction, can be divided into the following three types: reductive calcination, neutral calcination and oxidation calcination. Bauxite: The principal ore of aluminum. Geology

What is Refractory or Fire Bricks? Types, Composition ...

Refractory bricks are also known as firebrick or fire brick. ... - Made from fire clay containing 50% of chrome iron ore, 30% iron oxide (Ferrous oxide) and 20% bauxite with little silica - Resists temperature upto 2000℃ ii) Carborundum - A special type of natural refractory bricks - Made from fire clay containing a higher percentage of silicon carbide - Used in electric furnaces - Resists ...

Treatment of Refractory Gold Ores - XPS

Treatment of Refractory Gold Ores Extractive Metallurgy Once the cause has been identified, there are a number of alternatives for treating the ore. Firstly, the gold can be made more amenable to cyanidation by ultra-fine milling, followed by a hot atmospheric leach –the Albion Process. A second solution is complete pressure oxidation (POX), which is effective for all conditions except ...

Treatment of carbonaceous refractory gold ores -

The first two of these types of refractory ore are of common occurrence. The current discussion will be focused on carbonaceous refractory ores. The deleterious effect of carbonaceous matter in gold ores on cyanidation has been recognized by the mining industry for many years. Prominent among the U.S.A. carbonaceous refractory gold deposits are those of Carlin Mines, Gold Quarry and Maggie ...

ALTA Gold 2012 E-Doc - Home Albion Process

ore reserves. Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide-leaching circuits, even when the ore is finely ground. The cause of low gold recoveries can be either through the presence of naturally occurring ‘preg robbing’ carbonaceous materials or gold physically ‘locked’ in sulphide minerals. The majority of gold ores are classified ...

Refractory and Non-Refractory Ore - Gold Companies

Non-refractory ore is where cyanide can be used to extract the gold. This is desirable as it means the process will be cheaper. Refractory and Non-refractory are relative terms, and the degree to which any ore is amenable to cyanide extraction will range from near 0% through to near 100%. Whether gold is refractory or non-refractory has a huge bearing on a potential mine's viability. A deposit ...

Treatment of Refractory Gold Ores - XPS

Treatment of Refractory Gold Ores Extractive Metallurgy Once the cause has been identified, there are a number of alternatives for treating the ore. Firstly, the gold can be made more amenable to cyanidation by ultra-fine milling, followed by a hot atmospheric leach –the Albion Process. A second solution is complete pressure oxidation (POX), which is effective for all conditions except ...

What is Refractory or Fire Bricks? Types, Composition ...

Refractory bricks are also known as firebrick or fire brick. ... - Made from fire clay containing 50% of chrome iron ore, 30% iron oxide (Ferrous oxide) and 20% bauxite with little silica - Resists temperature upto 2000℃ ii) Carborundum - A special type of natural refractory bricks - Made from fire clay containing a higher percentage of silicon carbide - Used in electric furnaces - Resists ...

Treatment of carbonaceous refractory gold ores -

The first two of these types of refractory ore are of common occurrence. The current discussion will be focused on carbonaceous refractory ores. The deleterious effect of carbonaceous matter in gold ores on cyanidation has been recognized by the mining industry for many years. Prominent among the U.S.A. carbonaceous refractory gold deposits are those of Carlin Mines, Gold Quarry and Maggie ...

Refractory, Definition, Types, Materials and Applications ...

Refractory, Definition, Types, Materials and Applications, a Guide. Refractory materials are used in some high-intensity and highly industrial applications, requiring robust protective materials. These applications range from furnaces and kilns to incinerators, and even reactors. They’re used to make crucibles and similar uses like moulds for casting glass, metals and for flame retardent and ...

Gold extraction - QueensMineDesignWiki

Gold ore can be classified as free-milling, complex, or refractory and each type of ore has different challenges when it comes to processing methods. Cyanidation with CIL/ CIP continues to be the most common method, although there are environmental concerns due to toxicity. As mining companies continue to face pressure to reduce environmental impact, and as free-milling ores become less and ...

ALTA Gold 2012 E-Doc - Home Albion Process

ore reserves. Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide-leaching circuits, even when the ore is finely ground. The cause of low gold recoveries can be either through the presence of naturally occurring ‘preg robbing’ carbonaceous materials or gold physically ‘locked’ in sulphide minerals. The majority of gold ores are classified ...

Refractory - Wikipedia

Refractory materials. Refractory materials must be chemically and physically stable at high temperatures. Depending on the operating environment, they must be resistant to thermal shock, be chemically inert, and/or have specific ranges of thermal conductivity and of the coefficient of thermal expansion.. The oxides of aluminium (), silicon and magnesium are the most important materials used

Gold Ore Roasting Techniques

An extensive investigation into this matter is reported in two recent papers published in Australia: “The Condition of Refractory Gold in Lake View and Star (Kalgoolie) Ore” by N. I. Haszard and “Roasting and Treatment of Auriferous Flotation Concentrates” by A. F. B. Norwood. The conclusion reached, as reported in the first of the above papers, was that of the three forms in which the ...

11.5 Refractory Manufacturing

from the ore crushing, grinding, material drying and storage, and brick firing and finishing processes used in producing these types of refractories. Tables 11.5-4 and 11.5-5 present emission factors for emissions of filterable PM, filterable PM-10, hexavalent chromium, and total chromium from the drying and firing of chromite-magnesite ore. The emission factors are presented in units of ...