ore extraction refractory

ore extraction refractory

  • Extraction of lowgrade silver from a refractory AuAg ore in

    The occurrence state of the lowgrade silver (30.7 ppm) In refractory goldsilver ore from Beiya (Yunnan, China) was characterized. A pretreatment process of reductive leaching by cuprous in ammoniaammonium sulfate alkaline solution was reported in this paper. Cu metal was employed to reduce cupric to cuprous based 

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  • Improved gold and silver extraction from a refractory antimony ore by

    The latter mineral was identified to be the most important sulphide phase for the occurrence of gold and silver. Cyanide leaching of the ore consistently resulted in low extraction of gold (49%) and silver (18%) confirming the refractory nature of the ore. Alkaline sulphide treatment of the ore under suitable conditions was 

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  • Gold mineral processing Hatch

    Mining companies face a difficult decision. Do they process large, lowgrade deposits or look for smaller, often more complex ones in remote, often hardtoreach loions? To complie matters further, these ore bodies are often refractory, where the gold is locked within sulphide minerals or double refractory, in which 

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  • Synergistic extraction of gold from the refractory gold ore via NCBI

    Ultrason Sonochem. 2017 Jul37:471477. doi: 10.1016/j.ultsonch.2017.02.008. Epub 2017 Feb 9. Synergistic extraction of gold from the refractory gold ore via ultrasound and chlorinationoxidation. Fu L(1), Zhang L(1), Wang S(1), Cui W(1), Peng J(1). Author information: (1)State Key Laboratory of Complex Nonferrous 

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  • A new lease of life ZipaTank

    and deep primary sulphide ores extracted today were identified in 1951. By the time GPM acquired the Zod mine in 2007, ores with a low sulphide content had been nearly depleted, and the extraction technology at the associated Ararat plant was not adequate to process the remaining refractory sulphide ores. To tackle this 

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  • Gold Extraction from a High Carbon LowGrade Refractory Gold Ore

    A high carbon lowgrade gold ore, in which gold mainly occurs in carbonaceous matters, is a typical refractory gold ore whose conventional cyanide leaching extraction is only 12.9 %. In this paper,

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  • Processing of Konkola copper concen trates and Chingola SAIMM

    trates and Chingola refractory ore in a fully integrated hydrometallurgical pilot plant circuit by R.M. Whyte*, N. Schoeman†, and K.G. Bowes‡. Synopsis. The Konkola Deep Mining Project (KDMP) seeks to exploit the deep level potential of the Konkola Deeps orebody, producing high grade copper concentrates for treatment 

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  • evaluating process options for treating some refractory ores abstract

    Ore B. Figure 3: Precious metal extraction following cyanidation on both Ore A and Ore. B samples. Oxidation of Sulfides – Liberation of Gold and Silver. Most refractory gold ores and sulphide concentrates require some degree of oxidation of the sulphides to liberate gold locked as 'solid solution' or as very fine inclusions in 

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  • The reasons of gold refractory, Gold ore classifiion, and

    Nov 28, 2016 I. The reason of the gold mineral refractory The gold is finegrained or microscopic granular in the gold ore, and it is surrounded or infected in sulfide minerals(such as pyrite, arsenopyrite, pyrrhotite), and silie ore(such as quartz), or it is in the sulfide mineral Elvis Dai (BEIJING HOTMINING TECH Co.

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  • John T. Boyd Company – Refractory Ore Specialist Consultant

    Refractory Ores. It is well known throughout the mining industry that direct leaching gold deposits are becoming far less common and that the percentage of gold produced from refractory ore deposits will continue to increase for the foreseeable future. During the period from 1994 to 2009 the percentage of world gold 

    >>Details
  • Synergistic extraction of gold from the refractory gold ore via NCBI

    Ultrason Sonochem. 2017 Jul37:471477. doi: 10.1016/j.ultsonch.2017.02.008. Epub 2017 Feb 9. Synergistic extraction of gold from the refractory gold ore via ultrasound and chlorinationoxidation. Fu L(1), Zhang L(1), Wang S(1), Cui W(1), Peng J(1). Author information: (1)State Key Laboratory of Complex Nonferrous 

    >>Details
  • 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 pretreatment in order for 

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  • Extraction of lowgrade silver from a refractory AuAg ore in

    The occurrence state of the lowgrade silver (30.7 ppm) In refractory goldsilver ore from Beiya (Yunnan, China) was characterized. A pretreatment process of reductive leaching by cuprous in ammoniaammonium sulfate alkaline solution was reported in this paper. Cu metal was employed to reduce cupric to cuprous based 

    >>Details
  • Refractory ore chemistry Britannica

    In gold processing: Extraction from refractory ores. Many goldbearing 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 pregrobbing), 

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  • Pretreatment Process on Refractory Gold Ores with As JStage

    Arsenicbearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice. If use conventional cyanidation gold extraction process, the gold leaching rate is very low. Because gold in such ores is very fine particle 

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  • Gold extraction QueensMineDesignWiki

    The challenge of attaining economic extraction of gold from refractory ores is one of the main challenges in the mining industry today, as less refractory ores become more depleted. It is thus important to properly select an extraction method for refractory ores, based on mineralogy, precious 

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  • Improved gold and silver extraction from a refractory antimony ore by

    The latter mineral was identified to be the most important sulphide phase for the occurrence of gold and silver. Cyanide leaching of the ore consistently resulted in low extraction of gold (49%) and silver (18%) confirming the refractory nature of the ore. Alkaline sulphide treatment of the ore under suitable conditions was 

    >>Details
  • Ultra Fine Grinding A Practical Alternative to Oxidative Isamill

    Ultra Fine Grinding A Practical Alternative to Oxidative Treatment of. Refractory Gold Ores. S. Ellis. Kalgoorlie Consolidated Gold Mines. Kalgoorlie, WA. Abstract This paper details the operation of the ultra fine grinding process at KCGM as a non oxidative treatment for the extraction of gold from a refractory ores.

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  • Extraction of Gold from a LowGrade Double Refractory Gold Ore

    The treatment process of a lowgrade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work. The gold extraction of this ore by allsliming cyanidation was

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  • Refractory ore chemistry Britannica

    In gold processing: Extraction from refractory ores. Many goldbearing 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 pregrobbing), 

    >>Details
  • Refractory Gold Ore Treatment Methods 911 Metallurgist

    Graphite is present in the goldsilver ore in the Timmins Ochali Mining Co, mill in Columbia. It was noted that considerable carbonaceous schist occurs in the runofmine ore, not all of which is detrimental. However, small quantities of graphitic schist act as a 

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  • John T. Boyd Company – Refractory Ore Specialist Consultant

    Refractory Ores. It is well known throughout the mining industry that direct leaching gold deposits are becoming far less common and that the percentage of gold produced from refractory ore deposits will continue to increase for the foreseeable future. During the period from 1994 to 2009 the percentage of world gold 

    >>Details
  • Refractory Gold Processing ICMJ's Prospecting and Mining Journal

    Refractory gold ores are difficult to extract using a standard cyanide leach process, thus yielding a low gold extraction. There is a host of reasons an ore is refractory, such as the large size of the gold grains, the gold Graphite sample. grains are encapsulated in a sulfide, silica or nonporous mineral, minerals in the ore react 

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  • Extraction of Gold from a LowGrade Double Refractory Gold Ore

    The treatment process of a lowgrade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work. The gold extraction of this ore by allsliming cyanidation was

    >>Details
  • US5328669A Extraction of precious metals from ores and other

    Platinum group metals, gold and silver are extracted from complex ores, automobile scrap, refractory ores and as naturally occurring by leaching the precious metal containing materials with a solution containing halogen salts such as potassium or sodium iodide and bromide in the presence of ammonium ions and oxygen.

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  • Gold Extraction from a High Carbon LowGrade Refractory Gold Ore

    A high carbon lowgrade gold ore, in which gold mainly occurs in carbonaceous matters, is a typical refractory gold ore whose conventional cyanide leaching extraction is only 12.9 %. In this paper,

    >>Details
  • 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 pretreatment in order for 

    >>Details
  • A Novel Technique for Silver Extraction from Silver Sulphide Ore

    A novel technique for silver extraction from Ag2S is described. The method utilizes thiosulphate as complexing reagent and the redox reaction between SO2 added as Na2SO3 powder and H2S gas evolved. The parameters of the reaction such as pH, the reaction temperature, the complex equilibrium of Ag+ ion with 

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