working of copper slag cleaning furnace
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working of copper slag cleaning furnace

Copper Smelting Slag Cleaning in an Electric Furnace

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

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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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Minimization of Copper Losses in Copper Smelting

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 the discard slag in the range of ...

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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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EFFICIENCY OF COPPER RECOVERY FROM A SLAG IN THE

2015-9-7  slag cleaning reactor. It creates the conditions that the furnace is over-dimensioned for the amount of slag from Teniente Converter together with charged solid reverts. Efficiency of copper recovery from a slag in an electric furnace depends on number of factors. The furnace dimensions play significant role, determining slag circulation pattern

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Recovery of cobalt, nickel, and copper from slags,

Conventional slag cleaning furnaces (typically AC submerged-arc) rely largely on a gravity settling mechanism, whereby the entrained sulphide and metallic droplets are simultaneously collected. Sometimes, a quantity of matte is added to the slag, to enhance the coalescence of

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Slag cleaning: The chilean copper smelter experience ...

2000-8-1  Chile has seven copper smelters, four that are linked to primary producers (three owned by Codelco and one by Disputada) and three custom smelters (two owned by Enami and one by Noranda). Each smelter employs a different strategy for slag cleaning, thus each smelter obtains different results. This article outlines and compares the different slag-cleaning systems that are currently in operation ...

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Post-mortem Study of Magnesia–Chromite Refractory

2018-8-15  Slag cleaning in furnaces usually occurs in submerged arc furnaces (SAF) in which the settling of the matte/copper droplets is boosted by reducing viscosity and turbulence. In operation, the temperature is increased by using electrodes (adding fuel, in some cases) that generate minimum turbulence in the bath.

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Effect of Cooling Rate and Slag Modification on the

2020-7-31  The decrease in cooling rate in a temperature range from 1300 to 1000 °C increased the average size of the copper-rich droplets in the slag, which is beneficial for the recovery of copper in the subsequent slag cleaning by flotation.

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Effect of Cooling Rate and Slag Modification on the

2020-9-14  concentration of copper in the discarded slag is not large, typi-cally about 0.8–1 wt%, the total amount contained in slags is significant[5,6].Asaresult,itisnecessarytorecoverthecopper in the slags by suitablemethodsin aseparate slag cleaning step. In the past few years, methods like flotation [ 7, 8], leaching [9, 10], and bioleaching [11] have been proposed. Milling and

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working of copper slag cleaning furnace - satone.co.za

equipment used in the recovery of iron from copper slag. Mintek has been working on the recovery of cobalt, and the associated valuable metals, from slags, since 1988, using DC-arc furnace technology to effect selective carbothermic reduction of the oxides of cobalt, nickel, copper, (and zinc, where present), while retaining the maximum possible quantity of iron as oxide in the slag ...

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Cleaning of a copper matte smelting slag from a water ...

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 ...

Read More
Cleaning of a copper matte smelting slag from a water ...

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 molten slag, whereas in the second procedure, coal...

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copper slag cleaning furnace - wesolyskrzat.pl

Conventional slag cleaning furnaces (typically AC submerged-arc) rely largely on a gravity settling mechanism whereby the entrained sulphide and metallic . Get Price; Slag cleaning furnace - RHI AG. A well-established method of slag cleaning is the Electric Arc Furnace (EAF) process to clean copper and nickel slag. The slag cleaning furnace is ...

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12.3 Primary Copper Smelting

2015-9-10  Slag produced by flash furnace operations contains significantly higher amounts of copper than reverberatory or electric furnaces. Flash furnace slag is treated in a slag cleaning furnace with coke or iron sulfide. Because copper has a higher affinity for sulfur than oxygen, the copper in the slag (as copper oxide) is converted to copper sulfide.

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Diagnose for valorisation of reprocessed slag cleaning ...

2018-9-1  The commercial slag is produced in the slag cleaning furnace (SCF), where under high temperature (1250 °C) and reducing atmosphere its remaining copper content (5%, approximately) decrease (below to 1%), and flue dust, mainly enriched of Zn and Pb among other metals, is formed [Seetharaman et al., 2014, Schlesinger et al., 2011].

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Recovery of cobalt, nickel, and copper from slags,

Mintek has been working on the recovery of cobalt, and the associated valuable metals, from slags, since 1988, using DC-arc furnace technology to effect selective carbothermic reduction of the oxides of cobalt, nickel, copper, (and zinc, where present), while retaining the maximum possible quantity of iron as oxide in the slag.

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Diagnose for valorisation of reprocessed slag cleaning ...

Slag cleaning furnace flue dust is generated in the cleansing of copper slag and their reprocessing produces wastes considered hazardous materials. Due to their high metals content their disposal not offers any economic either environmental benefit. In view of this fact, the main objective was to gain basic information for the reuse of these ...

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Diagnose for valorisation of reprocessed slag cleaning furnace ...

2018-5-12  Slag cleaning furnace flue dust is generated in the cleansing of copper slag and their reprocessing produces wastes considered hazardous materials. Due to their high metals content their disposal not offers any economic either environmental benefit.

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Behavior of copper and lead during mineralurgical

2021-2-13  There are only a few smelters processing copper concentrates directly into blister copper. Despite the many advantages of this process, a serious challenge of this technology is the need to process the resulting flash smelting slag. It contains 12–15% copper

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copper slag cleaning furnace - charlyshop.ch

working of copper slag cleaning furnace SMS Group submerged -arc furnace and electric 2011-10-19 Enami Chile Cu-slag cleaning furnace 22 SELECTED... Know More. Smelter Plant. SMELTER smelter refinery in the slag cleaning furnace The matte is further oxidized to form blister copper Cu 985 in the converting furnace Mitsubishi...

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Copper Smelting Slag Cleaning in an Electric Furnace

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 was clarified.

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12.3 Primary Copper Smelting

2015-9-10  Slag produced by flash furnace operations contains significantly higher amounts of copper than reverberatory or electric furnaces. Flash furnace slag is treated in a slag cleaning furnace with coke or iron sulfide. Because copper has a higher affinity for sulfur than oxygen, the copper in the slag (as copper oxide) is converted to copper sulfide.

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Development of Electric Furnace Slag Cleaning at a ...

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 coke was required to improve fuming of ...

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Copper losses to slags obtained from the El Teniente ...

2013-7-18  Results obtained show that the main part of copper losses in the slag from the El Teniente furnace are mechanically entrapped or floated unsettled droplets of the co-existing matte phase. Conversely, the very low copper losses in the slag from the slag cleaning furnace are limited by the physicochemical form.

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THE SUBMERGED ARC FURNACE (SAF) STATE OF ART IN

2017-4-3  Chemical slag cleaning process . The Metals in smelting and converting slags are present either dissolved, present mostly as ions (e.g. for copper slag as Cu + ions) or as entrained droplets of matte. The dissolved metals is associated eithe r with O. X- ions (i.e. Cu. 2. O) or with S. X-ions (e.g. Cu. 2. S). Electric furnace slag cleaning uses ...

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MICROSTRUCTURE CHARACTERISATION OF FREEZE

2015-2-2  lining microstructure forming on water cooled steel surface in a high-silica, slag cleaning furnace slag of a direct-to-blister copper smelter is mostly glassy or amorphous. It contains 5-30 µm magnetite crystals, very small and larger copper droplets as well as small magnetite and silicate nuclei embedded in the glassy silica-rich matrix.

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LINEAR REGRESSION ANALYSIS OF COPPER

ZHOU Jun (Jinlong Copper CoLtd,Tongling,Anhui 244021,China) Operation data from Jinlong flash smelting slagcleaning furnace are analyzed with multifactor linear regressionThe linear equation of relating copper content of slag with some factors is establishedAnalysis of square difference indicates that the regression equation is highly prominent,and there is a close linear relationship between ...

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Oxidation Potentials in Matte Smelting of Copper and ...

2014-8-1  Kemori and co-workers18,19 measured oxidation potentials in an Outokumpu design copper flash smelting furnace and its associated converter and electric slag-cleaning furnace at the Toyo smelter of Sumitomo Metal Mining Co. Averages of five measurements of each (normalized to 1250°C) gave potentials of [−7.5/1250] in the reaction shaft; [−7 ...

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Behavior of copper and lead during mineralurgical

2021-2-13  There are only a few smelters processing copper concentrates directly into blister copper. Despite the many advantages of this process, a serious challenge of this technology is the need to process the resulting flash smelting slag. It contains 12–15% copper

Read More
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