Nov 20, 2013· Aiming at recovering iron from high-iron-content copper slag, this article introduced a combination technology of deep reduction and magnetic beneficiation, investigated the iron recovery efficiency and optimized the technical conditions. When coke powder with 86wt% fixed carbon was used as a reductant, iron was successfully extracted from the copper slag. Under the optimized condition …
Abstract Leaching and recovery processes for zinc and copper from brass slag by sulfuric acid were carried out and iron and aluminum were also precipitated as hydroxides in addition to silica gel.
Recovery of copper from smelting slag by sulphation roasting and water leaching 411 Materials and experimental methods Experiments were conducted using a reverberatory furnace slag from the Bor Copper Concentrator, Serbia. The slag was sampled from the crushing line before entering the milling section of the concentrator.
minerals Article E ciency of Chemical and Biological Leaching of Copper Slag for the Recovery of Metals and Valorisation of the Leach Residue as Raw Material in Cement Production Päivi Kinnunen 1,*, Jarno Mäkinen 1, Marja Salo 1, Ratana Soth 2 and Konstantinos Komnitsas 3 1 VTT Technical Research Centre of Finland Ltd, Visiokatu 4, 33101 Tampere, Finland; jarno.makinen@vtt.fi (J.M.); marja ...
considered as a copper slag. Recovery of pig iron containing copper from copper smelting slag by reduction smelting was also recently examined, and successfully performed, and produced the pig iron [ 9-11 ]. The flotation concentrate from gold mining tailings in Jeonnam Province was used in this research. The experiments included the
Sep 11, 2009· This discarded slag contains important amounts of metallic values such as copper and iron. The recovery of copper values from an Indian smelter slag that contains 1.53% Cu, 39.8% Fe and 34.65% SiO 2 was the focus of the present study. A complete investigation of the different phases present in the slag has been carried out by means of optical ...
copper slag characterized as hazardous materials, due to the increasing environmental concern for disposal of copper slag. In recent years, extensive studies have been carried out to recover the valuable metals from copper slag. Basically, they can be classified into three main categories, namely physical separation process,
The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coal-based direct reduction. Under the best reduction conditions of 1300 °C reduction temperature, 30 min reduction time, 35 wt.% coal dosage, and 20 wt.% CaO dosage (0.75 binary basicity), the Fe grade of obtained iron concentration achieved 91.55%, and the Fe recovery was 98.13%.
penetrator is of a different colour than the slag in the vicinity of those penetrators where it was agitated by the CO, and CO. 2. gases generated by the reactions of the slag reductions. The slag in the layer under the penetrator contained more copper than the slag above this layer. Key words: copper recovery, Outokumpu direct-to-copper ...
Copper slag usually has a low content of CaO; granulated copper slag exhibits pozzolanic properties as CaO content in copper slag increases, it can exhibit cementitious properties. Studies [8-12] indicated that a copper slag, which contains approximately 19% CaO, show a good cementitious property under the activation of NaOH.
The recovery of copper from smeltery furnace slag by flotation has been studied. By analysis the slag containing 1.61% copper and 27.80g/t silver is available to recovery. The effective factors such as particle size, the amount and type of collector were examined. The combination of the collectors was also examined. With the process utilized in this work, a copper concentrate of 26.47% Cu with ...
Waste copper slag is a refractory material with high iron content, but it is difficult to recovery iron minerals from the slag because the iron mainly occurs in fayalite. A new technology of coal-based direct reduction-magnetic separation process was developed to recover iron from the slag assaying 39.85% Fe total and 0.33% Cu.
Recovery of Copper and Cobalt from Converter Slag with a New Flotation Method Using H2S 71 Table 1 The spectral wavelength of metal for AAS. Metal Wavelength (nm) Silit (nm) Current (mA) Oxidant-Fuel Copper 324.75 0.5 3 Air-Acetylene Cobalt 240.73 0.2 10 Air-Acetylene Table 2 …
mining conglomerate "Zambia Consolidated Copper Mines", Chambishi Cobalt Plant was packaged with the 20 million tonnes slag stockpile. The cobalt grade of the slag ranged from 0.34% to 4.5% where as copper averaged 1.2%.The stockpile was created over a period of 60 years since 1935 by dumping the slag generated from the
PII: S 0 3 0 4 - 3 8 6 X ( 0 2 ) 0 0 1 3 8 - X 64 A.N. Banza et al. / Hydrometallurgy 67 (2002) 63–69 Ghatsila smelter copper slag containing 4.03% Cu, Table 1 0.48% Co and 1.98% Ni by pressure leaching at 130 Chemical composition of the sample from the Lubumbashi copper slag dump jC.
A novel hydrometallurgical method was developed to recycle valuable metals of Si, Fe and Cu from copper slag. The leaching rates of 98%, 99% and 91% for SiO2, Fe and Cu, respectively, were obtained under optimized parameters: solid-to-liquid ratio is 1:10; concentration of hydrochloric acid is 35%; the reaction time is 2 hours and at 80-90°C.
Leaching and recovery processes for zinc and copper from brass slag by sulfuric acid were carried out and iron and aluminum were also precipitated as hydroxides in addition to silica gel. The factors affecting the performance and efficiency of the leaching processsuch as agitation rate, leaching time, acid concentration and temperature were ...
An approximate amount of 2 million tons of copper slag has been lying on the northern part of Turkey from ancient time. This slag contains 0.43% cobalt and 1% copper. This paper reports work ...
Recovery of cobalt from slag in a DC arc furnace at Chambishi, Zambia. More recently, attention has been focused on the Nkana slag dump on the Zambian Copperbelt. More than six decades of copper mining and smelting at the site near Kitwe, 250 km north of Lusaka, have left behind about 20 million tons of slag grading between 0.3 and 2.6% cobalt ...
Recovery of Copper and Cobalt from Copper Slags as Selective 390 Table 2 Operating conditions for ICP-OES. Parameter Power (W) 1,450 Plasma gas flow rate (L·min-1) 15 Auxiliary gas flow rate (L·min-1) 0.2 Nebulizer gas flow rate (L·min-1) 0.8 Sample flow rate (L·min-1) 1.5 View mode Axial-radial
copper content in the slag id decreased to less than 0,6 %mass, which was successfully confirmed by the obtained results. It is illustrated by the data presented in Figure 5. SUMMARY The research on reduction of copper flash smelting slag using various carbon reducers showed a small de-gree of iron transfer to the metal alloy. The maximum
Hydrometallurgical treatment is widely used for the recovery of copper slag, including direct leaching in sulfuric acid, and leaching in sulfuric acid through H 2 S gas or ferric chloride [10, 11 ...
Jun 05, 2013· 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 and maximum recovery …
copper, molten slag containing iron oxides plus gangue and flux oxides, and offgas. The slag typically contains as much as two percent copper. This slag can be recycled to the flash furnace, or its copper content can be recovered in a slag cleaning furnace, often electric. The flash furnace
Apr 28, 2018· RECOVERY OF PIG IRON FROM COPPER SMELTING SLAG BY REDUCTION SMELTING Copper slag is a by-product obtained during smelting and refining of copper. Copper smelting slag typically contains about 1 wt.% copper and 40 wt.% iron depending upon the initial ore quality and the furnace type. Main components of copper slag are iron oxide and silica.
Copper slag is a by-product obtained during smelting and refining of copper. Copper smelting slag typically contains about 1 wt.% copper and 40 wt.% iron depending upon the initial ore quality and the furnace type. Main components of copper slag are iron oxide and silica. These exist in copper slag mainly in the form of fayalite (2FeO ·SiO2). This study was intended to recover pig iron from ...
The grade of the matte is defined as the copper grade of matte A matte of 40 percent means, it has 40% copper, so matte is always given in terms of copper, because it is used to produce copper not iron Slag in matte smelting is mixture of oxides e.g. in smelting of copper ore concentrate the slag may contain SiO 2, Al 2 O 3, calcium oxide, FeO ...
obtained revealed that zinc and copper are successfully recovered from these secondary resources, where the percent recovery amounts to 95% and 99% for zinc and copper, respectively. The exper-imental data of this leaching process were well interpreted with the shrinking core model under chemically controlled processes.