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Cleaning experiments of a copper matte smelting slag from the water-jacket furnace was undertaken by direct reduction in a laboratory-scale electric furnace. ... In the first p … Cleaning of a copper matte smelting slag from a water-jacket furnace by direct reduction of heavy metals J Hazard Mater. 2009 May 30;164(2-3):856-62. doi: …
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Figure 1: Tuyere and purging plug arrangements in a slag cleaning furnace that are considered in the study. Figure 2: (a) Capillary plug integrated into furnace lining.
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rotary slag-cleaning furnace are now generally used to perform this task, giving a level of copper in dis- ... For the experimental work, the sulfide/copper mixtures thereby prepared were then ...
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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. ... slag cleaning in a settling furnace ...
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The effects of power input, electrode immersion, slag temperature and coke and solid revert additions on the rate of magnetite reduction and copper recovery were …
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The smelter features a single Isasmelt furnace for smelting, one 6-in-line electric furnace for matte-settling and slag-cleaning duties, four Peirce-Smith converters and two rotary anode furnaces.
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This paper highlights a new invention to improve slag cleaning, which shows great potential especially for the copper and nickel with PGM industry. The fundamental principles are presented together with the latest results of pilot-scale test work, carried out in a Chilean copper smelter. Figure 1. Conventional AC based slag cleaning furnace ...
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The future challenge for copper smelters is to increase metal yield by reducing copper losses and valorizing the slag as a marketable by-product. This can be achieved through further slag cleaning in a conventional submerged arc furnace (SAF) where remaining metallic oxides are reduced, and metal droplets have more settling …
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A significant source of copper losses from pyrometallurgical copper extraction is attributed to dissolved and entrained copper in discarded slag. Entrained copper can be recovered via pyrometallurgical slag cleaning in a settling furnace, where the slag viscosity and copper droplet size distribution (CDSD) are critical parameters. …
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The optimum slag cleaning conditions were determined as follows: reductive agent coke dosage of 6%, 2% pyrite addition of converter slag weight and smelting at 1350°C for 3 h. ... copper-zinc concentrate and matte of the blast furnace on the content of copper and magnetite in converter slags. The content of Cu in the slag …
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Sulfidation treatment of copper smelting slag. In the sulfidation experiment, the particle size of the synthesized slag was controlled below 80 mesh (178 µm).The mixture of CaSO 4 and anthracite was pelletized at a pressure of 1.0 MPa in a Ø 4 mm pressing tool, and the weight of every pellet was roughly controlled to be 0.04 g. Then …
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Learn how Outotec's Flash Smelting technology is the cleanest and most efficient method for producing copper and nickel from sulfide concentrates. Explore the benefits, …
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The smelting and converting El Teniente process for copper concentrates as well as slag cleaning furnace technologies to treat slags coming out from the El Teniente furnaces are widely applied ...
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Based on the physicochemical reaction of the melt, the process of copper slag cleaning in an electric furnace could be divided into two steps: reduction and settling. In the …
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A series of copper slag cleaning experiments with different WCO dosages along with various temperatures and settling durations was systematically carried out in …
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The submerged electric arc furnace (SAF) has proven a versatile unit in numerous metallurgical applications for more than a century. Countless innovations have made this furnace type become …
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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 …
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where c(x,y,z,t) is the concentration of copper (I) oxide, k is the reaction rate constant, and A(x,y,z,t) is the specific surface of contact between the area of bubbles and the slag (available as a result of DPM-multiphase flow simulation).The kinetic Eq. 1 is implemented with user-defined functions (UDF) in FLUENT [].The competing reaction of …
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Copper matte and slag continuously flow through a chute to the electric slag cleaning furnace for separation by precipitation; the copper matte, at a grade of around 70%, flows continuously through a chute into the converting furnace for converting; the cleaned slag contains 0.6–0.8% copper and is discharged continuously for water …
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This fraction is significant because it affects heavily on the copper recovery during the slag cleaning phase. Basically, the fraction of oxide copper is dependent on the amount of sulfur present, which was kept fixed at 0.9%. The higher the oxidation degree and thus the copper content in slag, the higher the oxidized copper content as a ...
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Converter copper slag can be viewed as an important secondary resource for valuable metals, considering its high commercial value. The current research investigates the recycling of copper by a combination of theoretical and experimental methods. Based on a modified Stokes equation, it was determined that copper droplets …
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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 ... copper layer at the bottom. Thus, the aim of this work is to evaluate the mechanisms of buildup formation on the electric furnace hearth. MOLTEN 2009. Santiago, Chile 1213
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Reduction of copper oxide is an important step of metal recovery and slag cleaning in copper production. This can be achieved by slag treatment with injected reducing agents.
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The growth of electric arc furnace (EAF) steelmaking in North America has occurred mainly in the past 40 years due to low electricity prices, an abundance of steel scrap (especially near large population centers), and the development of mini and macro steel mills based on metal recycling. Scrap availability and price has made steel …
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To recover copper from copper slag, a novel slag cleaning method was proposed. The thermodynamics and binary phase diagram of FeO–SiO 2 were calculated first. Then, the effects of experimental parameters on the reduction of Fe 3 O 4, recovery of copper, and slag cleaning mechanism were investigated.The results showed that the …
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in many electric slag-cleaning furnaces and in some rotary slag-cleaning furnaces. The ultimate objec-tive of the current work was to evaluate the mini-mum level of soluble copper that can be achieved in electric furnace slag-cleaning operations under conditions when a small layer of molten copper is present.
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slag cleaning unit. Thus, the furnace is a large, 13 m in diameter circular unit, equipped with three 1.0 m in diameter Söedeberg electrodes and 13.5 MVA transformer. Current-ly, the electric furnace operates as the slag cleaning unit, processing the liquid slag from Teniente Converter and solid reverts.
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NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. This is in keeping with our mission of promoting interest, research, and cooperation …
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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 …
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The purpose of this paper is to find differences in the performance of tuyeres and capillary plugs when they are used with high sulphur fuel oil (HSFO), natural gas, and hydrogen …
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