ore leaching sulphide

  • Copper Mining and Extraction Sulfide Ores

    The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. For example FeO(s) + SiO 2 (s) FeO.SiO 2 (slag) This is

    Live Chat
  • Oxidative Hydrometallurgy of Sulphide Minerals InTech

    Moreover , oxidative leaching of coal containing iron sulphide might also have a positive impact on coal cleaning prior to its use in energy related applications. The hydrometallurgy of different sulphide

    Live Chat
  • Leaching of Sphalerite with Hydrogen Peroxide and Nitric

    The conventional hydrometallurgical processes for the extraction of a base metal from a sulphide concentrate consist of a catalytic sulphating, roast, leaching of the metallic values, solvent extraction and selective stripping.

    Live Chat
  • High Pressure Leaching Hazen Research

    High Pressure Leaching. Some leaching operations require elevated temperatures and pressures to achieve the desired extraction. Examples of this include pressure oxidation (POX) of sulfide ores and concentrates, high pressure acid leaching (HPAL) of nickel laterites, and wet air oxidation of organics.

    Live Chat
  • Process Intensification of Zinc Oxide Leaching Process

    Keywords leaching, process intensification zinc oxide ore I. INTRODUCTION Zinc in ores occurs mainly as sulphide which is known as sphalerite (ZnS). The suphide is roasted to produce an oxide. Zinc oxide ores are the main source of zinc after zinc sulphide ores. With escalating depletion of zinc sulphide ores, zinc

    Live Chat
  • Alkaline sulfide leach of cinnabar ore and electrolytic

    of Californiaquot; experimented with California cinnabar ores using an alkali sulfide leach. In his work he found that ocher and other iron compounds caused trouble in the leaching process by using up sulfide in forming colloidal suspensions of iron sulfide. In ores containing little iron this problem is not important.

    Live Chat
  • A Novel Technique for Silver Extraction from Silver

    A Novel Technique for Silver Extraction,S. AYATA, H. YILDIRAN In this study, a novel method for silver extraction from silver sulphide ore is described. The leaching process is based on the reaction between SO 2 and H 2S, with thiosulphate as the complexing reagent. Experimental Materials and reagents The technical grade Na 2S 2O 4,Na 2SO 3

    Live Chat
  • Sulfide Ore Processing 171; TCB Metals and Refining

    Processing Sulfide Ores. Historically, miners have shipped their sulfide concentrates to overseas smelters that have little to no regulations or emissions controls. However, with the implementation of the Mercury Export Ban of 2008 and the high costs of installing equipment to prepare sulfide ores for

    Live Chat
  • WO2007042604A1 A method for leaching metal sulphide

    The invention relates to a method for the sulphate based leaching of metal sulphide minerals, such as chalcopyrite, CuFeS2, containing ore in atmospheric conditions. It is beneficial for the leaching of metal sulphides that the sulphide to be leached is treated before leaching or at the beginning of leaching with a sulphide salt that is more noble than the sulphide or the components it includes.

    Live Chat
  • Leaching of a low grade, coppernickel sulfide ore. 3

    Interactions between copper ions and selected sulfide mineral concentrates were investigated in flask and column tests under conditions relevant to heap leaching in order to understand why copper recovery from a coppernickel complex sulfide ore was significantly less than nickel recovery.

    Live Chat
  • Copper Ore Types Sulfides versus Oxides Nasdaq

    Copper sulfide ores. Secondary sulfides formed by supergene secondary enrichment are resistant to sulfuric leaching. When rich enough, native copper ore bodies may be treated to recover the contained copper via a gravity separation circuit. Supergene ores rich in sulfides may be concentrated using froth flotation.

    Live Chat
  • Oxidative Hydrometallurgy of Sulphide Minerals InTech

    Sulphide minerals are one of the most important sources of value metals, such as gold, silver, copper, zinc, etc. Due to the strong sulphur binding to these minerals, metals are usually extracted by pyrometallurgical route or hydrometallurgy with chemical oxidation.

    Live Chat
  • Heap Leach Mining's breakthrough technology MINING

    Aug 20, 20150183;32;This would result in a dramatic expansion of the technology as ~80% of total ore types are sulfide in nature. Heap Leaching, at first sight, seems to be a

    Live Chat
  • Accelerating Copper Leaching from Sulfide Ores in Acid

    This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini columns in acid nitrate chloride media. Ten pretreatment tests were conducted to evaluate different variables, namely the addition of nitrate as NaNO3 (11.7 and 23.3 kg/ton), chloride as NaCl (2.1 and 19.8 kg/ton), curing time (20 and 30 days) and

    Live Chat
  • Sulphide Gold Ore Treatment by Leaching and Flotation Process

    Sulphide Gold Ore Treatment by Leaching and Flotation Process. For many years, after introduction of the cyanide process for dissolution of gold, the usual practice was to grind all the ore with little or no concentration before cyanidation. There were two general cyanidation flowsheets; sand leaching and all

    Live Chat
  • Leaching of Primary Copper Sulfide Ore in Chloride Ferrous

    Leaching tests were conducted in columns loaded with approximately 50 kg of agglomerated ore; the ore was rst cured for 14 days and then leached for 90 days. The highest copper extraction, 50.23%, was achieved at 32.9 C with the addition of 0.6 kg of H 2SO4 per ton of ore, 0.525 kg of NaCl per ton of ore, and 0.5 kg of FeSO4 per ton of ore

    Live Chat
  • Sulphide Gold Gekko

    Sulphide complex gold can occur in a wide range of particle sizes. Because cyanide cannot always leach sulphide associated gold, regrinding the ore is typically required to expose the free gold for recovery by intensive leaching .

    Live Chat
  • Copper extraction

    Copper extraction. As in all mining operations, the ore must usually be beneficiated (concentrated). The processing techniques depend on the nature of the ore. If the ore is primarily sulfide copper minerals (such as chalcopyrite ), the ore is crushed and ground to liberate the valuable minerals from the waste ('gangue') minerals.

    Live Chat
  • Ore column leaching with thermophiles I, copper sulfide

    The concentrations of ferrous iron in ore column effluents and the pH of the effluents during the leaching of a copper sulfide ore were followed as an indication of the activity of the microbial populations that were established in the ore columns.

    Live Chat
  • Copper Mining and Processing Processing of Copper Ores

    B. Processing of Sulfide Ore. The heated liquid is poured into a slag settling furnace. This step produces a combination of matte, a mixture of copper, sulfur and iron, and slag, a dense, glassy material made of iron, silica, and other impurities. The copper matte created by

    Live Chat
  • CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING

    Chloridehypochlorite oxidation and leaching of refractory sulfide gold concentrate 67. chlorous acid species to chlorine species occurred at higher pHs. Thus, chlorine gas could be formed easier, and due to escaping of the chlorine oxidant from the solution, Eh drops rapidly. Fig.

    Live Chat
  • method to leach sulphide ore with high cyanide tcfuwhr

    US20120304828A1 Process of leaching gold Google Patents. The flotation method is a method for separating and recovering the objective In case where sulfide ore of the objective metal contains gold, it is difficult to leach is lower compared to the case where cyan is used, resulting in a higher cost. . compared to the cyanide process, that is, the prior process for leaching gold.

    Live Chat
  • Heap leaching

    Heap leaching. Heap leaching is an industrial mining process to extract precious metals, copper, uranium, and other compounds from ore via a series of chemical reactions that absorb specific minerals and then re separates them after their division from other earth materials. Similar to in situ mining,

    Live Chat
  • Effect of Pretreatment on Leaching Primary Copper Sulfide

    of 93% copper dissolution was obtained when the ore was treated with 90 kg Cl /t ore, 40 d of repose time and 50 C in ask leaching. Without any ore pretreatment, 53% copper dissolution was achieved. Using reactor leaching, an 85% copper dissolution was obtained using pretreatment stage.

    Live Chat
  • What is the best method for sulfide copper leaching?

    Popular Answers ( 1) One of the important subject in copper sulfide leaching, Ore Characterisation and related method. Bacteria Heap Leaching and Oxidative bacterial heap leaching two methods that apply for low grade copper sulfide leaching. Is the better you done and detailed search in

    Live Chat
  • Sulphide Leaching Mineral Processing amp; Metallurgy

    Sulphide Leaching. Double decomposition Copper sulphate can be used to separate Copper from Nickel in a sulphide ore or Copper from Fe in Cu Fe sulphide ore. CuSO 4 solution can also be used for removing Pb, Zn, and Fe from copper sulphide ores.

    Live Chat
  • The Leaching of Sulphide Minerals in Chloride Media

    The new process involves leaching of the whole ore in two stages 1) a primary leach during which the pyrrhotite is leached with HCl assisted by MgCl2 to yield hydrogen sulphide (from which energy

    Live Chat
  • Bioleaching

    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.

    Live Chat
  • A Novel Technique for Silver Extraction from Silver

    A Novel Technique for Silver Extraction,S. In this study, a novel method for silver extraction from silver sulphide ore is described. 2S, with thiosulphate as the complexing reagent. 3 were used. The leaching process was carried out in a 1L beaker placed on a hot plate with a magnetic stirrer.

    Live Chat
  • CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

    Chloridehypochlorite oxidation and leaching of refractory sulfide gold concentrate 65 Fig. 3. Particles size analysis of gold concentrate Fig. 4. XRD analysis of gold concentrate obtained by flotation Table 1. Major elements composition of the ore and floated concentrate

    Live Chat
  • The bioleaching of sulphide minerals with emphasis on

    Chalcocite (Cu2S) is the main copper sulphide mineral mined at bioleaching operations. Some of the chalcocite heap operations began as oxide (chemical) leach operations and were converted to bioleach (oxidative) operations by heap aeration and/or inoculation, when the oxidised ore was depleted.

    Live Chat
  • Leaching of Sphalerite with Hydrogen Peroxide and Nitric

    The leaching of sulphide in oxidizing medium has been investigated by other researchers [3,5,9,10] and it has been established that the sulphide is oxidized to elemental sulphur and eventually to sulphate depending on the redox potential of the oxidant.

    Live Chat
  • Process Intensification of Zinc Oxide Leaching Process

    Keywords leaching, process intensification zinc oxide ore I. INTRODUCTION Zinc in ores occurs mainly as sulphide which is known as sphalerite (ZnS). The suphide is roasted to produce an oxide. Zinc oxide ores are the main source of zinc after zinc sulphide ores.

    Live Chat
  • Recovery of Gold in Pyritic Sulfide Ores Mine Engineer.Com

    Sulfide ores, such as chalcopyrite, sphaelerite, galena, and pyrrhotite, and mixtures of these ores have historically been found with micron size gold particles included in them. This generally involves frother, several collectors (promoters) and possibly some modifying or depressing agents as well.

    Live Chat
  • Copper sulfide ore value chain Outotec

    Extract maximum value with minimum environmental impact when processing sulfide copper ores. We understand the intricate challenges and have the expertise and experience to design and optimize solutions to suit your specific ore type and from complete concentrator plants to specific equipment.

    Live Chat
  • Mining and Extraction Oxide Ores processes for

    Pyroprocessing Sulfide Ores Provides Acid for Leaching. The process used to treat sulfide copper ores begins at the mine site, where the copper bearing minerals are physically separated from the rest of

    Live Chat
  • Acid leaching of oxidesulfide copper ore prior the

    Leaching of oxide sulfide copper ore The influence of time and H2SO4 concentration on the leaching degree of oxide copper, leached out from the ore sample, was determined and presented in Figure 3. Figure 3. Leaching efficiency vs. process time for different H2SO4 concentrations in the leaching solution.

    Live Chat
  • Leaching of Primary Copper Sulfide Ore in Chloride Ferrous

    Hence, different leaching techniques for copper sulde ores, especially chalcopyrite, need to be investigated in the future. Presently, the mining industry faces the challenge of extracting copper from low grade copper ores. In 2002 the average copper ore grade was 1.13%, while in 2011 it was 0.84% [3].

    Live Chat