tteffect of sulphur on gold ore

tteffect of sulphur on gold ore

Sulphur Refining of Gold - 911 Metallurgist

2016-3-23  It may be that other investigators found that the alkaline sulphides attacked gold by actually reducing some sodium compound to metallic sodium in contact with gold; this would alloy with the gold, and if sulphur was present at the same time the effect would be the same as described on adding sulphur to a prepared alloy.

More

The effect of sulfide minerals on the leaching of gold

2006-8-1  Jeffrey and Breuer (2000) used gold containing 5% silver rather than high purity gold to investigate the effect of sulfur species and suggested that soluble sulfide hinders the rate of gold leaching by forming a protective layer of the type Au/S x. They showed that this was a monolayer of sulfur which forms at potentials negative of the bulk sulfur deposition potential.

More

Sulfur isotopes in sediment-hosted orogenic gold

This implies that the Au and S are transported together in the ore fluid, and added to the rock during the ore-forming process. The relationship between S isotopes in gold-ore pyrite and the seawater sulfate curve through time revealed here is compelling evidence that the ore fluid for Sukhoi Log and most other sediment-hosted orogenic deposits contained a major proportion of seawater S.

More

CHAPTER 7 EFFECT OF CONDITIONING pH ON SULPHUR,

2021-2-3  was investigated on No. 2 Gold Plant feed. After the initial conditioning for 1 minute, 1.25kg/t of sulphuric acid was added and the pH decreased from 7.8 to 1.9. At the same time, the pulp potential increased from 0.3V to 0.6VΩ. The pulp was conditioned for 10 minutes, the pH rose to 3.7 and the potential decreased to 0.5V.

More

Influence of structural setting on sulphur isotopes in ...

2008-10-14  Removal of H 2 S from the ore fluid into the vapour phase during phase separation also causes a decrease in the total activity of sulphur (aΣS) in gold ore fluids, which destabilises gold–bisulphide complexes and shifts the fluid from the pyrite stability field to the pyrite–hematite equilibrium curve (Fig. 10). This results in a rapid decrease in gold solubility and the precipitation of

More

Pretreatment Process on Refractory Gold Ores with As

Cigna corporation has made experiments on gold ore of most deposit in the world. 20) The result showed that the effect on ore bearing sulphur of 1%–50% was good and time of oxidation pretreatment was short. But it is not beyond the scope of high temperature and pressure.

More

Oxidative pre-treatment in thiosulphate leaching of ...

2010-2-19  Elemental sulphur and copper sulphide were believed to form at the gold surface preventing the leach solution from diffusing to the gold surface and hence, inhibiting the gold dissolution. However, the leach solution possibly caused the decrease of the leaching rate after a certain time of leaching.

More

Modelling and simulation of gold ore leaching

2009-11-20  A leaching model for gold ore that takes into account the impact of cyanide and oxygen concentrations as well as gold surface exposure on leaching performance is developed. Cyanide consumption is estimated by an empirical model that is a function of ore particles size distribution as well as cyanide, copper and sulphur concentrations. The proposed model has been validated by data from laboratory leaching tests on the Sleeping Giant gold mine ore.

More

Hydrothermal alteration and mineralization of Baiyun

In addition, the release of sulphur from the syn‐ore stage 1 pyrite was likely another trigger for the gold precipitation. Most of syn‐ore stage 2 invisible gold occurred as nano‐particles. The ore‐forming fluids consist mainly of primary magmatic fluids mixed with minor metamorphic fluids. The ore metals may have sourced mainly from the magmatic fluid and the sillimanite‐mica schist of the Gaixian Formation.

More

Mineralogical Characteristics and in-situ Sulfur

2021-3-4  We study the Qilishan gold deposit in the northwestern Jiaodong Peninsula with detailed mineralogical observation and in-situ sulfur isotope analyses, in order to reveal the gold occurrence and the origin of ore-forming fluids. The Qilishan gold deposit is mainly clastic altered rock-type in mineralization, and ore minerals are visible native gold, electrum, pyrite, chalcopyrite and galena,

More

Genesis of hydrothermal gold mineralization in the

2021-2-15  Here we present results from an integrated study involving field investigation, ore petrology, in situ sulphur isotopes, and trace elements analysis of gold‐bearing pyrite with a view to understanding the genesis of the hydrothermal gold mineralization.

More

Atmospheric alkaline pre-oxidation of refractory

Four iron-sulphide-containing gold ores from the White Mountain mine in the Jilin Province, China were studied to examine the benefits of using oxidative treatment prior to conventional cyanidation to leach gold. This pre-treatment consisted of bubbling air into an ore/water mixture for eight hours while adding enough caustic sodium hydroxide to maintain a pH of 11 throughout the test. Three ...

More

Rare sulphur dominates the deep Nature

2011-2-24  A form of sulphur rarely seen on Earth's surface, similar to that which gives the mineral lapis lazuli its deep-blue colour, may be the predominant form of the element in Earth's lower crust and ...

More

Transport of metals and sulphur in magmas by

2015-2-23  Emissions of sulphur 1,2 and metals 3,4 from magmas in Earth’s shallow crust can have global impacts on human society. Sulphur-bearing gases emitted into

More

Hydrothermal alteration and mineralization of Baiyun

The syn‐ore stage 1 K‐feldspar also altered to minor secondary quartz at syn‐ore stage 2. In addition, the release of sulphur from the syn‐ore stage 1 pyrite was likely another trigger for the gold precipitation. Most of syn‐ore stage 2 invisible gold occurred as nano‐particles.

More

The geology and ore deposits of Goldfield, Nevada

2012-4-1  116 THE GEOLOGY AND ORE DEPOSITS OF GOLDFIELD, NEVADA. In June, 1907, W. J . Sharwood a published a drawing of a thin section of Mohawk ore in which he shows particles of native gold embedded in a dark "sulpho-telluride," which he found-gave 8lrong reactions for sulphur, tellurium, copper, and iron, also for arsenic, antimony, gold, and silver (about 6 per

More

Modelling and simulation of gold ore leaching

2009-11-20  • The space distribution of gold grain centres inside ore particles is uniform • Gold is unbreakable, therefore fragmentation is intergranular • Total liberation of gold grains occurs when at least 50% of the volume of gold is out of an ore particle • Gold grains positioned farther than a threshold

More

GOLD-SILVER ORE CERTIFIED REFERENCE MATERIAL

S, Sulphur (wt.%) 0.201 0.008 0.197 0.204 0.195 0.207 Aqua Regia Digestion Ag, Silver (ppm) 5.42 0.320 5.28 5.57 5.28 5.56 *Gold Tolerance Limits for typical 30g fire assay charge weight determined from 20 x 1g INAA results and the Sampling

More

Sulfides, Selenides and Tellurides: rebellious and ...

2012-4-18  Sylvanite: A rich telluride of gold and silver. After calaverite, sylvanite is probably the next most important telluride ore mineral. It can assay as high as 30% gold. It is found with other telluride minerals in some precious metal ore deposits. Petzite: A gold and silver telluride that is mostly silver. Silver content is usually three times ...

More

Chris Ralph's Gold Prospecting Encyclopedia:

2014-6-26  Chris' Prospecting Encyclopedia, Your best source of information on: Gold nuggets, gold panning, how to design and build your own mining equipment, metal detecting for nuggets, dredging for gold, prospecting books, California prospecting, 49ers, rock hounds, investing, mining stocks, mother lode, sulfides, turquoise, jewelry, silver, gold, gems, gold

More

Atmospheric alkaline pre-oxidation of refractory

Four iron-sulphide-containing gold ores from the White Mountain mine in the Jilin Province, China were studied to examine the benefits of using oxidative treatment prior to conventional cyanidation to leach gold. This pre-treatment consisted of bubbling air into an ore/water mixture for eight hours while adding enough caustic sodium hydroxide to maintain a pH of 11 throughout the test. Three ...

More

Rare sulphur dominates the deep Nature

2011-2-24  A form of sulphur rarely seen on Earth's surface, similar to that which gives the mineral lapis lazuli its deep-blue colour, may be the predominant form of the element in Earth's lower crust and ...

More

The geology and ore deposits of Goldfield, Nevada

2012-4-1  116 THE GEOLOGY AND ORE DEPOSITS OF GOLDFIELD, NEVADA. In June, 1907, W. J . Sharwood a published a drawing of a thin section of Mohawk ore in which he shows particles of native gold embedded in a dark "sulpho-telluride," which he found-gave 8lrong reactions for sulphur, tellurium, copper, and iron, also for arsenic, antimony, gold, and silver (about 6 per

More

CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING

2012-10-4  gold recovery. However, cyanidation after dissolving the ore sample in hydrochloric acid (HCl), sulfuric acid (H 2 SO 4), ferric chloride (FeCl 3) and nitric acid (HNO 3), re-spectively, increased the gold recovery to 98.1%. This shows that the ore is a sulfide refractory gold ore (Saba et al., 2011).

More

GOLD-SILVER ORE CERTIFIED REFERENCE MATERIAL

S, Sulphur (wt.%) 0.201 0.008 0.197 0.204 0.195 0.207 Aqua Regia Digestion Ag, Silver (ppm) 5.42 0.320 5.28 5.57 5.28 5.56 *Gold Tolerance Limits for typical 30g fire assay charge weight determined from 20 x 1g INAA results and the Sampling

More

Sulfides, Selenides and Tellurides: rebellious and ...

2012-4-18  Sylvanite: A rich telluride of gold and silver. After calaverite, sylvanite is probably the next most important telluride ore mineral. It can assay as high as 30% gold. It is found with other telluride minerals in some precious metal ore deposits. Petzite: A gold and silver telluride that is mostly silver. Silver content is usually three times ...

More

Biochemistry of Gold

0.25 mm ore particle or dust gold on a poor growth medium. After some time a change of gold into an ionic state in the zones of bacterial development was registered. Bacteria of the genera Bacillus and Pseudomonas dominated. The role of heterotrophs in the dissolution of gold was originally investigated by Pares (1964a,b, 1968).

More

Bioleaching of Phosphorus from Low Grade Ores and ...

Bioleaching experiments of phosphorus from low grade fluorapatite ore containing 8.2% P2O5 and from fluorapatite concentrate containing 29.8% P2O5 were carried out in shake flasks. Elemental sulphur was supplemented as an energy source for acid generation. Mixed and pure acidophilic bacterial cultures consisting of iron-and/or sulphur-oxidizing bacteria Acidithiobacillus ferrooxidans, A ...

More

Chris Ralph's Gold Prospecting Encyclopedia:

2014-6-26  Chris' Prospecting Encyclopedia, Your best source of information on: Gold nuggets, gold panning, how to design and build your own mining equipment, metal detecting for nuggets, dredging for gold, prospecting books, California prospecting, 49ers, rock hounds, investing, mining stocks, mother lode, sulfides, turquoise, jewelry, silver, gold, gems, gold

More

Ores Gold Mountain Wiki Fandom

2021-5-30  All Ores and minerals has its own characteristic. Strength is a minimal required level for one-hit ore mining; base amount is how many hits ore tile can withstand; amount for level up is a characteristic which shows current level ore limit in inventory, after its reaching you will rewarded. Full ores characteristic table is available here. Stone: Common material found in Free Mine, Gold Mine ...

More