Under these conditions, the TC slag (average total copper in slag similar to 6 wt-% Cu) contains less than 1 wt-% Cu as soluble copper with approximately 90% of total copper in the slag is ...
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. …
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 …
Copper slag cleaning in an electric furnace consists of two steps: high-temperature reduction, and melt separation through sedimentation. High-temperature reduction, which primarily reduces the excessive Fe 3 O 4 in slag to FeO, is a critical step as it involves a chemical process that depends on many variables. On the contrary, the …
Magnetite stratification and a corresponding gradient in copper content occurred in the slag. The experimental results, combined with an analysis of the phenomena taking place in an electric furnace, led to an improved understanding of the slag cleaning mechanism and contributed to the successful start up of the slag …
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 …
Outotec Slag Cleaning. Slag cleaning at copper and nickel smelters is typically done using an electric furnace process. The design of Outotec slag cleaning furnaces is based on our extensive experience with diferent slag compositions and …
The advantages of flash smelting over roasting/electric furnace melting are that flash smelting: (1) requires much less energy than electric smelting and (2) avoids the electric furnace's emission of weak SO 2 gas [ 31 ]. It is also a high production rate process, perfectly matched to the 50–100-μm particles in froth flotation concentrates.
Conventionally, converter slag with a high copper content is processed in electric furnaces to recover the copper before being discarded. The formation and motion of copper droplets in electric slag cleaning furnace is an ongoing area of research.[31,32,33,34,35]
Slag Cleaning Furnace. In this furnace, copper rich oxide slags are melted in electric arc furnaces and coke & copper 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 ...
The typical process steps in the pyrometallurgical processing are smelting, converting, fire-refining and anode casting followed by tankhouse electrorefining to …
This is followed by the slag cleaning furnace (CL-furnace) which features a slag overflow and matte syphon directing the molten impure copper to the converting furnace (C-furnace). The concentrates mixed with fluxes and other raw materials are rapidly melted as they are injected through the top blowing lances with oxygen enriched …
Copper slag, a by-product of copper pyrometallurgy, inevitably contains a certain amount of copper. Oxygen-enriched smelting technologies increase the copper content in slag …
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 …
Entrained copper can be recovered via pyrometallurgical slag cleaning in a settling furnace, where the slag viscosity and copper droplet size distribution (CDSD) …
The operations in slag-cleaning furnaces are improved by nitrogen purging through porous plugs, the main considerations being minimal metal losses to the slag (entrained particles and copper oxide ...
The slag sample was modified by heating in an electric furnace for 2 h in a nitrogen atmosphere and subsequently cooled slowly at a controlled rate to improve the liberation characteristics. ... Upgrading copper slag cleaning tailings for re-use. Miner. Eng., 133 (2019), pp. 35-42, 10.1016/j.mineng.2018.12.026. View PDF View article View …
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 the most commonly used furnace for increased metal recoveries and slag-cleaning operations. In many applications, SAFs are also employed …
The copper slag produced by the slag cleaning furnaces as a final by-product, yields copper in the range of 0.55–1.3 wt.% in the discarded slag, with copper …
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 …
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 slag viscosity, which can promote the ...
Copper oxide reduction accomplished with the injection of different reducing media (oil, natural gas, and hydrogen) for several tuyere/plug arrangements in a slag refining …
From the World Copper Smelter Survey 2004 it can be estimated that at that time 37% of the smelters used electric furnaces for slag cleaning, 26% used ... (2019) Ugrading copper slag cleaning tailings for re-use. Miner Eng 133:35–42. Article CAS Google Scholar Vadillo A, Mostaghel S, Barati M (2019) Air-blast cross-flow atomization …
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 ...
This study explored the influence of using copper slag as an alternative sand for producing cement mortar bricks and its effect on γ-ray attenuation property, strength, and consistency of mortar.
Slag cleaning can be divided into two types, first being the pyrometallurgical reduction and settling of liquid slag, which is performed in slag-cleaning furnaces, and the second type being the mineral processing-based slag cleaning of solidified or granulated slag by crushing and/or grinding followed by gravity concentration or froth flotation ...
Kansanshi Copper Smelter began operation in March 2015. The smelter features a single Isasmelt furnace for smelting, one 6-in-line electric furnace for matte-settling and slag-cleaning duties ...
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.
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 …
The corresponding slag bath to lining hot face convective heat transfer coefficient ranges between 600 and 1000 W/m 2 K. This is a high heat transfer coefficient compared to most other furnace ...
The results of an investigation on copper losses in industrial slag from the Teniente converter (TC) and from the electrical slag cleaning furnace (EF) at the Paipote smelter in Chile are presented.
Download Citation | New process for treating Slag Cleaning Furnace (SCF) flue dust at Atlantic Copper | Atlantic Copper is one of the largest copper producers in Europe. Its production facilities ...
For these conditions, the copper losses in the slag are roughly 75% as dissolved copper and 25% as entrained matte and copper. Such conditions include operating the electric furnace at metallic ...
Abstract The traditional fossil reductant used in the copper slag cleaning process cannot fulfill the requirements of sustainable development of the copper industry. Therefore, a new approach of employing waste motor oil (WMO) instead of a non-renewable fossil reductant to clean copper slag (reduce magnetite concentration and improve …
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 ...