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roasting sulfide concentrates for gold

Gold concentrate roasting, most commonly known as dead roasting, uses Outotecs circulating fluidized bed technology. When using a dead roasting process for concentrates, the sulfides are completely transformed into oxides. The gas temperature in this type of plant is typically between 600 and 700°C.

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  • Roasting  an overview | ScienceDirect Topics

    Roasting an overview | ScienceDirect Topics

    Gold roasting is a process, applicable to refractory ores and concentrates that contain sulfide sulfur, organic carbon, and potentially arsenic. Removal of these compounds is necessary to achieve high gold recovery (>90%) during cyanide leaching. Gold roasting is typically a metallurgical fluidized bed process.

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  • HIGH OXIDATIVE PROCESS FOR DEAD ROASTING OF

    HIGH OXIDATIVE PROCESS FOR DEAD ROASTING OF

    sulfide minerals rich in precious metals: silver and gold. Basically, these minerals contain: chalcopyrite, CuFeS2, pyrite, FeS2, as well as lead and zinc sulfide. Oxidation roasting of sulfide compound is the first stage of processing sulfide concentrates. The laboratory tests indicate the …

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  • roasting antimony sulfides

    roasting antimony sulfides

    process sulfide silver ore without roasting A method for roasting sulphide ores or ore concentrates , without having a , effect on this process stage When leaching gold or silver from the . ... roasting iron from antimony ore - mayukhportfoliocoin. roasting iron from antimony ore The metallurgy of antimony - MIT , process sulfide silver ore without roasting processing antimony sulfide ...

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  • OUTOTEC ROASTING SOLUTIONS

    OUTOTEC ROASTING SOLUTIONS

    DEAD ROASTING FOR ZINC SULFIDE, PYRITE, AND GOLD-BEARING SULFIDE MINERALS Dead roasting is the most commonly used roasting process and is mainly applied in our zinc and pyrite roasters. When using a dead-roasting process for concentrates, the sulfides are completely transformed into oxides. The gas temperature in this type of plant is

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  • Smelting tips for the Mocrowave Gold Kiln GPK

    Smelting tips for the Mocrowave Gold Kiln GPK

    Roasting Your Concentrates: Heres a suggestion from us and a couple of GPK users that can help with some types of black sand concentrate and is absolutely necessary for sulfide and partially oxidized ore concentrates. Remember: the less junk in your crucible, the easier it is to smelt out your precious metals from the concentrates and the ...

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  • US5254320A  Method for roasting sulphide ores  Google

    US5254320A Method for roasting sulphide ores Google

    A method for roasting sulphide ores or ore concentrates containing precious metals is practiced in a furnace, typically in a fluidized bed. The ore and a sulphur-binding lime-containing material are supplied to a roasting furnace in which the ore is roasted with the emission of heat and sulphur dioxide. The lime-containing material--such as calcium hydroxide--is mixed into the cooling water ...

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  • PYRITE ROASTING AN ALTERNATIVE TO SULPHUR BURNING

    PYRITE ROASTING AN ALTERNATIVE TO SULPHUR BURNING

    increase this maximum capacity for a single roasting line up to 1,800 t/d of concentrate. From an economic and technical standpoint, this throughput can only be achieved for one line by applying circulating fluid bed technology. In similar applications, the throughput e.g. in whole ore gold roasting plants can reach up to 3,800 t/d.

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  • Sulfide Ore Processing  TCB Metals and Refining

    Sulfide Ore Processing TCB Metals and Refining

    Sulfide Ore Processing; Placer Gold; Sulfide Ore Processing. Home → Sulfide Ore Processing . 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 ...

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  • Recovery of Copper from Copper Sulfide Concentrate by

    Recovery of Copper from Copper Sulfide Concentrate by

    Sulfation roasting was studied to extract copper from the copper sulfide concentrate. Sodium sul-fite was added as sulfation agent to the copper sulfide concentrate during roasting in this study. Sulfur removal rate at different roasting temperatures was investigated, and the effects of roasting

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  • Roasting and Leaching Bulk CopperZinc Sulfide

    Roasting and Leaching Bulk CopperZinc Sulfide

    Roasting and Leaching Bulk Copper-Zinc Sulfide Concentrates With the Subsequent Recovery of the Metals by Electrolysis. Introduction The standard practice for the treatment of copper-zinc sulfide ores involves the separation of their sulfides by selective flotation, follow-

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  • Froth Flotation Method | Gold and Silver Ore Flotation

    Froth Flotation Method | Gold and Silver Ore Flotation

    The froth Flotation method is widely used to treat various veins of gold and silver ores for the following reasons: (1) In most cases, froth flotation process can enrich gold and silver in sulfide concentrate to the greatest extent and discard a large number of tailings, thus reducing the smelting cost.

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  • Procedure for processing sulphide gold containing arsenic

    Procedure for processing sulphide gold containing arsenic

    The task is solved in that in the method for processing sulfide gold-arsenic-antimony concentrates and ores, including rihtovanie, roasting, condensation of gaseous compounds of antimony and arsenic, gold leaching of the calcine, according to the invention the mixture is prepared by mixing the concentrate or ore and chloride and/or ammonium ...

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  • Roasting metallurgy  Wikipedia

    Roasting metallurgy Wikipedia

    In roasting, the ore or ore concentrate is treated with very hot air. This process is generally applied to sulfide minerals. During roasting, the sulfide is converted to an oxide, and sulfur is released as sulfur dioxide, a gas. For the ores Cu 2 S and ZnS , balanced equations for the roasting are:

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  • Procedure for processing sulphide gold containing arsenic

    Procedure for processing sulphide gold containing arsenic

    The task is solved in that in the method for processing sulfide gold-arsenic-antimony concentrates and ores, including rihtovanie, roasting, condensation of gaseous compounds of antimony and arsenic, gold leaching of the calcine, according to the invention the mixture is prepared by mixing the concentrate or ore and chloride and/or ammonium ...

    More Details
  • Smelting tips for the Mocrowave Gold Kiln GPK

    Smelting tips for the Mocrowave Gold Kiln GPK

    Roasting Your Concentrates: Heres a suggestion from us and a couple of GPK users that can help with some types of black sand concentrate and is absolutely necessary for sulfide and partially oxidized ore concentrates. Remember: the less junk in your crucible, the easier it is to smelt out your precious metals from the concentrates and the ...

    More Details
  • Smelting high sulfides Gold concentrates  Gold Refining

    Smelting high sulfides Gold concentrates Gold Refining

    Jun 26, 2019 · New to the forum, thank you for you help. I have high sulfide ore from Colorado, I roasted my cons for 3hrs, I ran a magnet thru the cons, I mixed 40g of my ore with 120g of standard flux from Action Mining. ... Smelting high sulfides Gold concentrates. Post by Barren Realms 007 » October 29th ... Depending on the type of sulfides you have and ...

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  • Process for treating refractory gold ores by roasting

    Process for treating refractory gold ores by roasting

    The potential for leaching gold directly from a refractory Au-Cu sulfide concentrate, to replace the current treatment of roasting and cyanidation, was investigated using ammoniacal thiosulfate ...

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  • Roasting of Gold Ore in the Circulating FluidizedBed

    Roasting of Gold Ore in the Circulating FluidizedBed

    Gold roasting is a process, applicable to refractory ores and concentrates that contain sulfide sulfur, organic carbon, and potentially arsenic. Removal of these compounds is necessary to achieve high gold recovery (>90%) during cyanide leaching. Gold roasting is typically a metallurgical fluidized bed process.

    More Details
  • Effect of Pretreatment of Sulfide Refractory Concentrate

    Effect of Pretreatment of Sulfide Refractory Concentrate

    gold in iron sulfide minerals such as pyrite and arsenopy- rite. Such deposits are called refractory gold ores due to the encapsulation of fine particles of gold in the ore host. A clear boundary between refractory and non-refractory ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold

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  • US6699302B1  Treatment of metal sulphide concentrates by

    US6699302B1 Treatment of metal sulphide concentrates by

    A process for treating a metal sulphide concentrate which includes the steps of: a) roasting the concentrate to reduce the sulphide content of the concentrate, to a negligible value and b) melting the concentrate, under reducing conditions, in an electrically stabilized open …

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  • Gold Ore Processing Volume 15  2nd Edition  Elsevier

    Gold Ore Processing Volume 15 2nd Edition Elsevier

    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 ...

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  • Smelting Shaker Table Concentrates  Gold Refining

    Smelting Shaker Table Concentrates Gold Refining

    Jun 29, 2015 · Re: Smelting Shaker Table Concentrates At 5% gold in cons you have only a leaching proposition, not a smelting proposition. Base metals will drag a lot, if not all, of your gold values into the slag irrespective of the form of the base metals. You have two options for commercial operation.

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  • Roasting metallurgy  Wikipedia

    Roasting metallurgy Wikipedia

    In roasting, the ore or ore concentrate is treated with very hot air. This process is generally applied to sulfide minerals. During roasting, the sulfide is converted to an oxide, and sulfur is released as sulfur dioxide, a gas. For the ores Cu 2 S and ZnS , balanced equations for the roasting are:

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  • Fluidized roastingstage leaching of a silver and gold

    Fluidized roastingstage leaching of a silver and gold

    The process of fluidized roasting-stage leaching has been developed in this paper to extract silver and gold and their associated metals including copper, zinc and antimony from a complex polymetallic sulfide concentrate.

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  • Controlling SO2 emissions in the roasting of gold concentrate

    Controlling SO2 emissions in the roasting of gold concentrate

    Acid pressure oxidation is generally believed to be the most effective pretreatment for refractory sulfide gold ores and concentrates, although it is ineffective for some ores. For such ores and concentrates (usually those containing both carbonaceous and sulfide materials), roasting remains the most effective pretreatment before cyanidation.

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  • Leaching of a Gold Bearing Partially Roasted Sulphide

    Leaching of a Gold Bearing Partially Roasted Sulphide

    gold bearing sulphide and arsenide concentrate that was partially roasted and dumped by the 1960s when Santo António mine closed. Gold occurs in this concentrate as free particles in the range of 10-100 µm, most of them still enclosed in the pyrite and arsenopyrite matrix. Its content varies from

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  • 12.3 Primary Copper Smelting

    12.3 Primary Copper Smelting

    Pyrometallurgical techniques use heat to separate copper from copper sulfide ore concentrates. Process steps include mining, concentration, roasting, smelting, converting, and finally fire and electrolytic refining. 12.3.2 Process Description2-4 Mining produces ores with less than 1 percent copper. Concentration is accomplished at the

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  • Froth Flotation Method | Gold and Silver Ore Flotation

    Froth Flotation Method | Gold and Silver Ore Flotation

    The froth Flotation method is widely used to treat various veins of gold and silver ores for the following reasons: (1) In most cases, froth flotation process can enrich gold and silver in sulfide concentrate to the greatest extent and discard a large number of tailings, thus reducing the smelting cost.

    More Details
  • Controlling SO2 emissions in the roasting of gold concentrate

    Controlling SO2 emissions in the roasting of gold concentrate

    Acid pressure oxidation is generally believed to be the most effective pretreatment for refractory sulfide gold ores and concentrates, although it is ineffective for some ores. For such ores and concentrates (usually those containing both carbonaceous and sulfide materials), roasting remains the most effective pretreatment before cyanidation.

    More Details

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