Ammonia leaching of slag from direct-to-blister copper ...

Ammonia leaching of slag from direct-to-blister copper smelting technology ... An alternative to the currently used method of processing flash smelting slag

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Direct-to-Blister Copper Smelting with the ISASMELT ...

2017-2-9  Various slag systems have been considered for direct-to-blister smelting. They have been evaluated computationally, using the MPE thermodynamic modelling package

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Ammonia leaching of slag from direct-to-blister copper ...

2020-8-25  Smelting of copper concentrates in a flash furnace directly into a copper blister results in the production of slag with high copper and lead content. The

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(PDF) Fluxing options in the direct-to-blister copper smelting

Direct smelting of sulphidic copper concentrates to blister copper involves clear benefits in the smelting operation, in particular if modern flash smelting

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FLUXING OPTIONS IN THE DIRECT- TO-BLISTER COPPER

2015-9-7  The history of making blister copper in a Flash Smelting Furnace dates back to the late 1960’s, when Outotec’s predecessor Outokumpu first piloted the

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Leaching of Lead and Copper by Citric Acid from Direct

2019-9-4  The high content of copper in the slag results from the significant oxidation of the concentrate components in the furnace reaction shaft. This procedure is

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Development of Ferrous-Calcium Silicate Slag for the ...

2020-3-23  To mitigate possible environmental pollutions, the direct to blister (DTB) route is an important process for copper making because a single, SO 2-concentrated

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Freeze-lining formation and microstructure in a direct-to ...

2014-7-8  The fluxing of any direct-to-blister slag is demanding task as it must be fluid and maintain suitable properties in oxidising conditions of copper makingthe

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Biorecovery of copper from converter slags: Slags ...

2009-6-1  The heaviest molten phase obtained is periodically tapped from the furnace and sent to a converter for its conversion to blister copper. 2. Slag is subjected to

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Rodney Jones, Mintek Phillip Mackey, PJ ... - MINTEK

2015-7-15  copper, using the surrounding forest to supply energy for the process, and adding fluxing materials from areas close to the mines. • The smelting of copper sulfide

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Extractive Metallurgy of Copper

2021-2-27  1.2.4. Direct-to-Copper Smelting 7 1.2.5. Fire Refining and Electrorefining of Blister Copper 7 1.3. Hydrometallurgical Extraction of Copper 8 1.3.1. Solvent Extraction 8 1.3.2. Electrowinning 9 1.4. Melting and Casting Cathode Copper 10 1.4.1. Types of Copper Product 10 1.5. Recycle of Copper and Copper-Alloy Scrap 11 1.6. Summary 12 ...

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Biorecovery of copper from converter slags: Slags ...

2009-6-1  The heaviest molten phase obtained is periodically tapped from the furnace and sent to a converter for its conversion to blister copper. 2. Slag is subjected to cooling/solidification, crushing, grinding and flotation to obtain a 30 to 60% Cu-concentrate (Rao and Nayak, 1992).

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Leaching of lead and copper from flash smelting slag by ...

2019-5-1  As a direct-to-blister copper flash smelting slag contains important levels of copper (14%) and lead (2–4%) it is subjected to a process of high temperature reduction. To recover copper as well as lead the slag is subjected then to a process of decopperization by reducing the

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Blister Copper - an overview ScienceDirect Topics

Blister copper. The unrefined copper of about 98.5% purity produced from the converting step of copper smelting. Calcium ferrite slag. A slag based on CaO that contains FeO and Fe 2 O 3, which can absorb highly oxidized iron and thus is used in continuous copper converting under higher oxygen partial pressures than in conventional converting processes. ...

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Hydrometallurgical recovery of lead from direct-to-blister ...

2017-9-1  Furnace slag from direct-to-blister smelting of copper concentrates contains 12–15% of copper and 2.5–4% of lead. In this form it cannot be deemed as waste material, and thus it is subjected to a high-temperature process of slag decopperization; after this, converting process is performed on the Cu–Pb–Fe alloy being the product of ...

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Investigation on Direct-to-Blister Smelting of Chalcocite

2020-12-24  Direct-to-blister copper smelting is an important smelting process due to its short process, low energy consumption and environmental protection. This study attempts to use high-grade chalcocite as the raw material for direct-to-blister smelting to realize the production of blister in a single furnace.

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Fluxing Strategies for the Direct to Blister Smelting of ...

The slag make per unit of copper was 1.4 for the un-fluxed system, 2.4 for the iron oxide flux and 1.9 for the lime and silica fluxed systems. A series of pilot scale direct to blister smelting tests were conducted on the lime and silica fluxing system. The copper content of slag varied between 7 and 10% and increased slightly with excess ...

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Development of Ferrous-Calcium Silicate Slag for the ...

2020-3-23  To mitigate possible environmental pollutions, the direct to blister (DTB) route is an important process for copper making because a single, SO 2-concentrated stream can be produced.In this study, the ferrous-calcium silicate (FCS) slag system for the DTB process with a CaO content of ~ 15 wt pct was studied, as well as its equilibria with spinel, blister, and gas phases.

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The Influence of the Carbon Surface on the Rate of

2016-3-22  modern copper-making processes, e.g. direct-to-blister, the produced slags are reduced in an electric slag clean-ing furnace. For this reason, in the present study, the rate of the overall reduction of the slag from the di-rect-to-blister process employed at the copper plant “Głogów” was investigated. In order to obtain a high prod ...

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Phase Equilibrium Studies of Iron Silicate Slag Under ...

2019-12-6  Direct to blister (DTB) accounts for a significant process for copper making due to its simplified process chain and the production of a single stable SO 2-concentrated off-gas.In this study, the phase equilibria of iron silicate slags in the Cu-Fe-Si-S-O system at controlled atmosphere were, for the first time, experimentally investigated in the spinel primary phase field.

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Fluxing Strategies for the Direct to Blister Smelting of ...

The slag make per unit of copper was 1.4 for the un-fluxed system, 2.4 for the iron oxide flux and 1.9 for the lime and silica fluxed systems. A series of pilot scale direct to blister smelting tests were conducted on the lime and silica fluxing system. The copper content of slag varied between 7 and 10% and increased slightly with excess ...

Get Price

Leaching of Lead and Copper by Citric Acid from Direct-to ...

2018-11-8  Direct-to-blister copper flash smelting slag contains up to 14% of copper and 2-4% of lead. Considering this fact, this material is subjected to the high-temperature reduction process. After this, converting process is performed on the Cu-Pb-Fe alloy being the

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Blister Copper - an overview ScienceDirect Topics

Blister copper. The unrefined copper of about 98.5% purity produced from the converting step of copper smelting. Calcium ferrite slag. A slag based on CaO that contains FeO and Fe 2 O 3, which can absorb highly oxidized iron and thus is used in continuous copper converting under higher oxygen partial pressures than in conventional converting processes. ...

Get Price

Leaching of lead and copper from flash smelting slag by ...

2019-2-18  As a direct-to-blister copper flash smelting slag contains important levels of copper (14%) and lead (2–4%) it is subjected to a process of high temperature reduction. To recover copper as well as lead the slag is subjected then to a process of decopperization by reducing the oxide metal compounds in an electric furnace. This study presents an alternative to the above process by recovering ...

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Phase Equilibrium Studies of Iron Silicate Slag Under ...

Direct to blister (DTB) accounts for a significant process for copper making due to its simplified process chain and the production of a single stable SO 2 -concentrated off-gas. In this study, the phase equilibria of iron silicate slags in the Cu-Fe-Si-S-O system at controlled atmosphere were, for the first time, experimentally investigated in the spinel primary phase field.

Get Price

Fluxing Strategies for the Direct to Blister Smelting of ...

Copper concentrates which have high silica but low iron contents are difficult to smelt using conventional two stage smelting processes. Direct to blister smelting is possible using either iron oxide fluxes to produce a fayalite type slag or silica and lime fluxes to produce a lime-silica-iron oxide slag. The benefits of lime and silica fluxing option, have been quantified using both ...

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Phase Equilibrium Studies of Iron Silicate Slag Under Direct ...

2019-12-6  Direct to blister (DTB) accounts for a significant process for copper making due to its simplified process chain and the production of a single stable SO 2 -concentrated off-gas. In this study, the phase equilibria of iron silicate slags in the Cu-Fe-Si-S-O ...

Get Price

Investigation on Direct-to-Blister Smelting of Chalcocite

2020-12-24  Direct-to-blister copper smelting is an important smelting process due to its short process, low energy consumption and environmental protection. This study attempts to use high-grade chalcocite as the raw material for direct-to-blister smelting to realize the production of blister in a single furnace.

Get Price

Biorecovery of copper from converter slags: Slags ...

2009-6-1  The heaviest molten phase obtained is periodically tapped from the furnace and sent to a converter for its conversion to blister copper. 2. Slag is subjected to cooling/solidification, crushing, grinding and flotation to obtain a 30 to 60% Cu-concentrate (Rao and Nayak, 1992).

Get Price

Extractive Metallurgy of Copper

2021-2-27  1.2.4. Direct-to-Copper Smelting 7 1.2.5. Fire Refining and Electrorefining of Blister Copper 7 1.3. Hydrometallurgical Extraction of Copper 8 1.3.1. Solvent Extraction 8 1.3.2. Electrowinning 9 1.4. Melting and Casting Cathode Copper 10 1.4.1. Types of Copper Product 10 1.5. Recycle of Copper and Copper-Alloy Scrap 11 1.6. Summary 12 ...

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