Auriferous sulfidic hydrothermal quartz vein gold ore A

Auriferous sulfidic hydrothermal quartz vein gold ore from the Miocene of Slovakia 10 3 cm across at its widest This is a beautiful sulfide bearing hydrothermal quartz vein sample The whitish and light to medium gray colored material is quartz The brassy gold colored areas are chalcopyrite CuFeS2 copper iron sulfide The silvery gray areas some appear blue colored from reflecting

Analysis of Silver and Gold in Lead and Zinc Ore Minerals

Conclusion The ARL PERFORM X XRF spectrometer has an excellent sensitivity allowing the analysis of silver and gold in lead and zinc ore minerals with excellent precision and accuracy This ability helps provide a more cost effective and profitable mining operation This information has been sourced reviewed and adapted from materials provided by Thermo Fisher Scientific Elemental Analyzers

Ore genesis Wikipedia

Ore deposits formed by lateral secretion are formed by metamorphic reactions during shearing which liberate mineral constituents such as quartz sulfides gold carbonates and oxides from deforming rocks and focus these constituents into zones of reduced pressure or dilation such as faults This may occur without much hydrothermal fluid flow

Hypochlorite Pretreatment of a Low Grade Carbonaceous Gold

Hypochlorite pretreatment of a refractory carbonaceous gold ore showed promise as a method for oxidizing sulfidic and carbonaceous materials prior to conventional cyanide heap leaching However previous studies showed hypochlorite consumption is high and gold extraction is proportional to hypochlorite consumption

Gold Bearing Jasperoid in the Drum Mountains Juab and

The manganes e ore bodies are largely in the I ower carbonate beds above the basal quartzite and contain little copper or gold Crittenden and others 1961 p 507 508 The copper gold ore is chiefly associated with ferruginous jasperoid bodies that replaced

Sulphide Gold Gekko

Sulphide Gold Recovery Pre concentration of coarse 350 – 500 micron sulphide associated gold ore using the InLine Pressure Jig is required to reject gangue from the high value material The IPJ a classic pre concentration device is effective in gangue rejection prior to further processing of valuable gold bearing material Other turnkey modular systems for pre concentrating coarse

Auriferous sulfidic hydrothermal quartz vein gold ore A

Dec 04 2014 · Auriferous sulfidic hydrothermal quartz vein gold ore from the Miocene of Slovakia 10 5 cm across at its widest This is a beautiful sulfide bearing hydrothermal quartz vein sample The whitish and light to medium gray colored material is quartz The brassy gold colored areas are chalcopyrite CuFeS2 copper iron sulfide The silvery gray areas some appear blue colored from

GOLD RECOVERY OF REFRACTORY SULFIDE CONCENTRATES

The problem of refractory sulfide gold ore that has a gold recovery less than 50 when direct cyanidation applied still exists until now It needs oxidative pretreatment for cyanidation to be effective in gold recovery the objective of this study is figuring out the effect of sodium nitrite as an oxidizing reagent on cyanidation of refractory gold ore

Biooxidation of Refractory Gold Ores The Geobiotics Process

Brierley JA Biooxidation heap technology for pretreatment of refractory sulfidic gold ore In Biomine 84 Adelaide Australia Australian Mineral Foundation 1994

Sulphide Gold Ore Treatment by Leaching and Flotation Process

There are many arrangements and combinations using flotation in conjunction with treatment of gold ores The two gold process flowsheets shown with some variations are probably the most commonly used In Gold Flowsheet the ore is ground in water to such a size as to free the minerals sufficiently to produce a tailing by flotation low enough in value that it may be discarded

Economic evaluation of biooxidation of gold ores

Many parameters need to be considered during the project of sulfidic refractory gold ore process Capital and operation costs are among the most important ones Run of mine heap biooxidation could be very inexpensive and the smaller the crush size particle size the more expensive the capital and operating costs for biooxidation application

Comparative investigations on sulfidic gold ore processing

Gold was associated with pyrite tennantite or enargite in sulfidic refractory ores Gold occurs as native gold with calaverite petzite hessite and goldfieldite Gravity concentration didn t work well but

Barrick Thiosulfate Leaching of Double Refractory Ore

Double refractory ores present a unique challenge to the traditional method of gold recovery in mining Double refractory ores are ores that contain sulfides and carbons as opposed to single refractory ores which contain only sulfides In general the cyanide solution pulls the gold out of the ore and into solution

Using the Rosin Rammler method to correlate recovery with

As gold ores become more challenging to treat it is increasingly important that the impact of refractory behaviors on recovery is understood For example gold extraction and recovery faces many challenges when associated with or occluded by sulfides as the gangue material can produce cyanicidic complexes or even passivating films on the

Process for treating refractory gold ores by roasting

Recently the U S Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores comparing various treatment methods in which a ground ore pulp is

Bioleaching of Gold Ore Essay Example Graduateway

6 ADVANTAGES OF BIOLEACHING OF GOLD ORE Bioleaching of gold ore has many advantages when compared to other traditional pretreatment techniques such as roasting and pressure leaching Appendix A One of the greatest advantages of bioleaching is that it

US5013359A Process for recovering gold from refractory

A process for recovering gold from a refractory sulfidic ore which has been suspended in an aqueous slurry and oxidized using nitric acid so that substantially all of the gold in the ore is made available for recovery and at least a portion of the sulfidic components present during the oxidation are oxidized to elemental sulfur comprises bubbling air as a discontinuous phase upwardly through

Solvometallurgical process for extraction of copper from

sulfide minerals 28–30 Copper containing sulfidic gold ores have been leached in ionic liquids 31 Different authors have investi gated the leaching of copper from the sulfidic copper ore chal copyrite using ionic liquids 32–36 The addition of polar organic solvents such as

Schist Gold Ore Fp Search

Super High Grade Gold Silver Ore Samples Super high grade gold and silver ore we removed from some high grade gold quartz veins Assay results at the end of the video Samples contain free gold Pyrite Stockwork Veins With Gold Silver In A Schist Zone A heavily mineralized schist zone with pyrite veins found as a stockwork deposit

10007514 Centers for Disease Control and Prevention

In this environment a refractory ore alteration gold extraction and recovery on activated carbon occurs With highly carbonaceous ores cicl achieved a higher recovery than with primarily sulfidic refractory ores Basic cyanide amenability testing of two carbonaceous ores achieved only 5 5 and 46 pct recoveries respectively

Sulfide Ore Article about Sulfide Ore by The Free Dictionary

Sulfide Ore any of several natural mineral formations consisting of metal sulfides Metal selenides tellurides arsenides and antimonides are also classified among the sulfide ores Sulfide ores are an important source for the production of Ni Co Cu Zn Pb Mo Bi Sb and Hg They contain not only sulfides but also other minerals including

Bioleaching Wikipedia

Bioleaching is the extraction of metals from their ores through the use of living organisms This is much cleaner than the traditional heap leaching using cyanide Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper zinc lead arsenic antimony nickel molybdenum gold silver and cobalt

Rcovery of gold in pyritic ores Mine Engineer Com

Sulfide ores and pyrites in particular have caused and continue to cause difficulty in recovering the gold values from these ores In most instances visible gold can not be seen under microscopic examination of pyrite gold ores However if the ore is ground to 200 mesh most times a few specs of gold can be visibly seen under microscopic

PDF Biooxidation of sulfidic refractory gold ores

The past years have confirmed that Biooxidation is a viable technology which is used commercially to treat certain refractory sulfide gold concentrates There are several processes applied to achieve the oxidation of the sulfidic compounds

Gold Ore Processing Volume 15 2nd Edition

Gold Ore Processing Project Development and Operations Second Edition brings together all the technical aspects relevant to modern gold ore processing offering a practical perspective that is vital to the successful and responsible development operation and closure of any gold ore processing operation This completely updated edition features coverage of established newly implemented

Process for treating refractory gold ores by roasting

Microscopic gold inclusions in sulfide minerals cannot typically be extracted by conventional cyanidation The gold ore must be pretreated to oxidize sulfide minerals associated with gold and to remove other minerals and chemical compounds that interfere in the cyanidation leaching process The recovery of gold from refractory sulfidic carbonaceous ores after roasting pretreatment was studied

Tailings Wikipedia

Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore Tailings are distinct from overburden which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed The extraction of minerals from ore can be done two ways placer mining which uses water

Gold and Silver Pollutants Identified Using XRF

In the pyrometallurgical process ore concentrate containing lead zinc or both is fed in some cases after sintering into a primary smelter Lead concentrations can be 50 70 and the sulfur content of sulfidic ores is in the range of 15 20 Zinc concentration is in the range of 40 60 with sulfur content in sulfidic ores in the range of

Determination of metals in base metal ores using the

GCR 06 High grade chromite ore Cr Fe Phosphoric sulfuric acid OREAS 78 Nickel cobalt sulfide Co Ni Aqua regia OREAS 171 Manganese ore Mn Aqua regia OREAS 189 Nickel laterite ore Fe Mn Ni Phosphoric acid OREAS 701 High grade tungsten cop per gold magnetite ore Cu Fe W Phosphoric acid CCU 1d Sulfidic copper concen trate Cu Fe Pb Zn

World Gold 2019 proceedings AusIMM

preconcentration of sulfidic gold ores 111 S S Bacchuwar N P Mkandawire T McGrath C L Lin and J D Miller INCO cyanide destruction insights from plant reviews and laboratory evaluations 130 P L Breuer and D M Hewitt WORLD GOLD 2019 CONTENTS

sulfidic ores in the philippines

There are sulfidic and lateritic nickel ores Philippines mines the most nickel Other major mining countries are Russia Canada and Australia History Edit Nickel was found when a coppercoloured ore did not make copper metal Later it was found out that the ore was actually a nickel containing ore Nickel was isolated as a metal in 1751 Read

Understanding the heap biooxidation of sulfidic refractory

Title Understanding the heap biooxidation of sulfidic refractory gold ores Creator Bouffard Sylvie Date Issued 2003 Description An investigation has been conducted into the nature and rates of the physical chemical biological and thermal processes involved in the heap biooxidation of pyrite from refractory gold ores

Optimizing the alkaline oxidation pretreatment of a

The addition of 60 L h −1 of hydrogen peroxide in a slurry 60 w w solids of gold ore containing sulphides 2 5 w w FeS at a rate of 150 t h dry ore resulted in an increase in dissolved oxygen DO and the metallurgical recovery of Au from an average of 91 3 to 92 5 and overall reduction of NaCN consumption from an average of 0 52

Gold ore processing project development and operations

Gold Ore Processing Project Development and Operations Second Edition brings together all the technical aspects relevant to modern gold ore processing offering a practical perspective that is vital to the successful and responsible development operation and closure of any gold ore

Numerical modeling microwave roasting of refractory gold ore

The recovery of gold with sulfidic ore was higher because it got roasted at the limited power levels that was applied Scanning electron microscope studies showed size reduction of the ore particles which suggested capabilities of improved mass transfer of the lixiviant and promise of enhanced recoveries

Double Refractory Carbonaceous Sulfidic Gold Ores

This is just a small illustration of the variability of ore components and gold carriers key factors on selecting the processing method for a given ore Download Download full size image Figure 50 1 Gold deportment of two double refractory carbonaceous sulfidic ores a b and an oxide ore c

The recovery of gold from refractory ores by the use of

Recently the U S Bureau of Mines examined the recovery of gold by chlorination of refractory carbonaceous and sulfidic ores comparing various treatment methods in which a ground ore pulp is contacted with chlorine gas and activated carbon is added to the pulp for a carbon in chlorine leach CICL The objective of this research was to demonstrate the basic feasibility of CICL technology

Microbial recovery of metals from solids FEMS

Gold ore Au Chromobacterium violoceum Chlorella vulgaris Carbon containing gold ore Au Thiobacillus sp heterotrophic fungal and bacterial strains Sulfidic gold ore Au Ag Cu Thiobacillus ferrooxidans Manganiferous silver ore Ag Bacillus sp Bacillus polymyxa Sulfidic ore Au Ag Cu

PDF Cyanidation of Refractory Gold Ores A Review

The degree of refractoriness has been classified based on the proportion of gold recovered Table 1 Marsden and House 2009 The gold in refractory sulfide gold ores is surrounded by sulfide

Tailings info What Are Tailings Their nature and production

Tailings characteristics can vary greatly and are dependent on the ore mineralogy together with the physical and chemical processes used to extract the economic product Ritcey 1989 reported that tailings of the same type may possess different mineralogy and therefore will have different physical and chemical characteristics

steps on how to process gold from ore at home BINQ Mining

Hard Rock Mining Gold and Silver Ore and processing it The first step in pocket hunting is to This cyanide method is used to process Nevada s Micron Gold Ores Processing Rich Gold Ores Affordable Home More detailed

Barrick Thiosulfate Leaching of Double Refractory Ore

recover gold from double refractory ores instead of single refractory ores gold has a strong affinity for the carbon in the ore slurry along with the activated carbon used to capture the gold Double refractory ore is comprised of sulfidic and carbonaceous materials The

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