Electric Slag Cleaning Copper Smelting

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Copper Smelting Slag Cleaning in an Electric Furnace by

2020-10-16  Copper slag cleaning using the flotation method and/or in an electric furnace is widely adopted in industrial production.[2,3,4,5] The flotation method has the advantages of low energy consumption and low copper content in the slag, but the waste liquid treatment after flotation has always been an issue.

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Copper Smelting Slag Cleaning in an Electric Furnace by

Copper slag cleaning in an electric furnace is a critical process for reducing the excessive magnetite (Fe3O4) present in the copper slag to decrease the

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INNOVATIVE TECHNOLOGIES FOR COPPER SMELTING

Tenova Pyromet has developed innovative technologies for copper smelting and electric slag cleaning furnaces. Based on client feedback and requirements, innovative designs

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Development of Electric Furnace Slag Cleaning at a

2013-12-20  The use of an electric arc furnace for recovery of metal values from slag generated in a secondary copper smelter has been successfully demonstrated and commercialized. Blast furnace slag containing about 1.5% Cu, 1.0% Pb, 3.5% Zn, 1.0% Ni, 40% FeO and 1.0 opt Ag was retreated to recover better than 75% of the metal values. The addition of limestone and

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Cleaning of a copper matte smelting slag from a water

2009-5-30  Cleaning experiments of a copper matte smelting slag from the water-jacket furnace was undertaken by direct reduction in a laboratory-scale electric furnace. The effects of coal-to-slag ratio, w, and the reduction time, t, were considered for two different coal/slag mixing procedures. In the first procedure, metallurgical coal was added to the

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Slag cleaning in crossed electric and magnetic fields

2007-1-1  Smelting slag from Teniente Converter contains from 12% to 20% of magnetite and from 3% to 8% of copper. Two thirds of total copper is present in the form of copper matte inclusions of size from 5 to 1000 μm. One third of copper is dissolved in the slag. Slag cleaning in an electric furnace requires reduction of magnetite to the level 5–6%

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Minimization of Copper Losses in Copper Smelting Slag

2012-9-21  During the last few decades, the pyrometallurgical processes used for cleaning copper smelting slags have been steadily optimized. The electric furnace or rotary slag-cleaning furnace are now generally used to perform this task, giving a level of copper in discard slag typically in the range of 0.55 wt.% and 1.3 wt.%, with most plants reporting copper losses in

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Minimization of Copper Losses in Copper Smelting Slag

2017-8-29  namics of copper smelting was also established over this period.3 With the subsequent introduction of flash and bath smelting technologies, wherein smelter matte grades of 60–70 wt.% Cu were becoming common, new technologies such as the electric slag-cleaning furnace and the rotary slag-cleaning furnace evolved to replace the slag-cleaning

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MECHANISM OF BUILDUP FORMATION IN AN ELECTRIC

2015-9-7  The copper slag cleaning in an electric furnace is based on slag reduction and settling of copper matte inclusions. Copper recovery depends on the slag temperature, degree of magnetite reduction and slag residence time. The formation of solid buildup on the furnace hearth leads to the decrease of furnace volume and slag residence time, affecting

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Kinetics of Copper Reduction from Molten Slags

2014-10-27  from copper flash smelting slags. The flash smelting and slag cleaning processes are described in the introductory part. The studies are focused on the slag cleaning process in the three electrode electric furnace (EF), where components of the slag reduce to matte and EF slag in a periodic batch process.

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Copper Smelting Slag Cleaning in an Electric Furnace by

In view of the non-renewable reductant resources and carbon neutralization in the process of copper slag cleaning in an electric furnace, this study proposed to use waste cooking oil as reductant to replace fossil energy. Combined with the phase equilibrium theory and experimental results, the harm of excessive magnetite in the copper smelting slag to the cleaning process

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Reduction of Magnetite from Copper Smelting Slag

The copper smelting slag reduction experiments were carried out in a slag cleaning electric furnace as shown in Fig. 1. Six electrodes were settled in the upper zone of the electric furnace. As the reducing agents, petro-diesel or biodiesel was sprayed into the copper smelting slag layer with nitrogen through the spray guns settled in two ends of

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BACKGROUND REPORT PRIMARY COPPER SMELTING

2021-6-25  its copper content can be recovered in a slag cleaning furnace, often electric. The flash furnace offgas contains anywhere from 10 to 80 percent by volume sulfur dioxide (SO 2). In all domestic copper smelting facilities utilizing flash smelting technology, the

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Minimization of Copper Losses in Copper Smelting Slag

The experimental work was performed under slag-cleaning conditions for different levels of Fe in the matte and for a range of Fe/SiO2 ratios in the slag. All experiments were carried out under conditions where three phases were present (copper–matte–slag), which is the condition typically prevailing in many slag-cleaning electric furnaces.

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Dalmia Slag Cleaning

Slag Cleaning Furnace. In this furnace, copper rich oxide slags are melted in electric arc furnaces and cokecopper pyrite are added to reduce copper content in the slag. In order to increase reaction rate, slag is over-heated to produce low viscosity aggressive slag. Dalmia-OCL’s Co-clinker series Magnesia Chrome bricks have excellent

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Kinetics of Copper Reduction from Molten Slags

2014-10-27  from copper flash smelting slags. The flash smelting and slag cleaning processes are described in the introductory part. The studies are focused on the slag cleaning process in the three electrode electric furnace (EF), where components of the slag reduce to matte and EF slag in a periodic batch process.

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Original Research Physicochemical, Mineralogical

top-blown smelting, slag cleaning electric furnace and converter blowing. The studied CEFS is one of the CSS, which generate from an electric furnace for cleaning the copper slag after oxygen-enriched top-blown smelting. Preparation and Experimental Process A flowsheet of copper and iron recovery route developed in this study is shown in Fig. 1

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Heavy Metal Recovery from Slags of Copper Production

2021-8-17  coke from 9.6 wt.% to content less than 0.1 wt.% in the final slag. [5] 4 Slag cleaning by using additives The copper recovery from slag during smelting is generally related to the settling be-haviour of the matte. The settling velocity mainly depends on the size of the particles.

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RECOVERY OF IRON FROM COPPER FLASH SMELTING

2015-9-7  The flash smelting process has been used in copper industry for a number of years and has replaced some conventional copper smelting processes in Chile. The high copper content in the slag in this process, require a further cleaning in an electric furnace. Also, the converter

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Extractive Metallurgy of Copper

2021-2-27  10.8. Electric Furnace Cu-from-Slag Recovery 186 10.8.1. Glogo´w 187 10.8.2. Olympic Dam 187 10.9. Cu-in-Slag Limitation of Direct-to-Copper Smelting 187 10.10. Direct-to-Copper Impurities 187 10.11. Summary 188 References 189 Suggested Reading 189 11. Copper Loss in Slag 191 11.1. Copper in Slags 191 11.2. Decreasing Copper in Slag I

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Reduction of Magnetite from Copper Smelting Slag

The copper smelting slag reduction experiments were carried out in a slag cleaning electric furnace as shown in Fig. 1. Six electrodes were settled in the upper zone of the electric furnace. As the reducing agents, petro-diesel or biodiesel was sprayed into the copper smelting slag layer with nitrogen through the spray guns settled in two ends of

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Recovery of Copper from the Slag of Khatoonabad Flash

2013-6-5  Copper loss in the slag of Khatoonabad flash smelting furnace is estimated to be about 1–3 %. At present, the electric slag cleaning furnace is used for the recovery of copper from slag. However, due to low recovery efficiency of electric furnace along with high consumption of electrical energy and water, selection of a method to enable minimum energy consumption

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Copper smelting combined with slag cleaning Inco Limited

Copper smelting combined with slag cleaning . United States Patent 4802916 applicant has found that the silica-based slags used in the patented process require a difficult slag cleaning operation in an electric furnace or slow cooling and flotation of copper metal to achieve good copper recovery. In addition, when blister copper is produced

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Minimization of Copper Losses in Copper Smelting Slag

The experimental work was performed under slag-cleaning conditions for different levels of Fe in the matte and for a range of Fe/SiO2 ratios in the slag. All experiments were carried out under conditions where three phases were present (copper–matte–slag), which is the condition typically prevailing in many slag-cleaning electric furnaces.

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RECOVERY OF COPPER FROM SMELTING SLAG BY

2015-11-11  and converter slag which contain 0.5-2% Cu and 2-8% Cu, respectively. The following three methods are generally utilized for recovering the copper from these slags on an industrial scale: (i) recycling of the converter slag to the smelting furnace, (ii) cleaning of smelting and/or converter slags in electric furnaces and (iii) flotation.

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Heavy Metal Recovery from Slags of Copper Production

2021-8-17  coke from 9.6 wt.% to content less than 0.1 wt.% in the final slag. [5] 4 Slag cleaning by using additives The copper recovery from slag during smelting is generally related to the settling be-haviour of the matte. The settling velocity mainly depends on the size of the particles.

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Understanding the bottom buildup in an electric copper

2020-4-9  possible influence on the buildup formation in an electric copper smelting furnace. The impact of parameters such as Fe/SiO 2 ratio, partial pressure of oxygen and the content of the oxides ZnO, Al 2O 3 and Cr 2O 3 in the slag were investigated with respect to the liquidus temperature of the slag.

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Improving Copper Recovery from Production Slags by

2013-10-14  Keywords: slag cleaning, stirring mode, copper slag, submerged arc furnace, stirring reactor Abstract Slags resulting from pyrometallurgical copper processes are important by-products to be controlled in structure and composition. Due to the significant volumes of slag compared with those of the

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Extractive Metallurgy of Copper

2021-2-27  10.8. Electric Furnace Cu-from-Slag Recovery 186 10.8.1. Glogo´w 187 10.8.2. Olympic Dam 187 10.9. Cu-in-Slag Limitation of Direct-to-Copper Smelting 187 10.10. Direct-to-Copper Impurities 187 10.11. Summary 188 References 189 Suggested Reading 189 11. Copper Loss in Slag 191 11.1. Copper in Slags 191 11.2. Decreasing Copper in Slag I

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Copper Environmental Profile

2019-3-4  Copper has six major life cycle phases: mining, smelting and refining, semi-fabrication, product manufacture, use phase and recycling. Recycling takes place both at smelters for copper production and at fabricators for production of semi-finished products. The International Copper Association’s Copper Cathode Life Cycle

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