Iron Recovery From Slags
Oxidative modification of industrial basic oxygen furnace …
The iron recovery of the oxidation slags is calculated from the recorded grade and mass of magnetic slag by Eq. (4), as shown in Fig. 10 . (4) Recovery % = Q m × α m Q × α × 100 % Where Qm is the mass of the magnetic slag, αm is the grade of the magnetic slag, Q is the mass of the corresponding initial slag, and α is the grade of the ...
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Iron recovery from lead smelting water-quenching slag by …
This study explored the recovery of valuable metal elements in the lead smelting water-quenching slag using the method of "roasting–grinding–magnetic …
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Recovery of low phosphorus iron from steel slag using …
To produce low phosphorus iron from steel slag, a smelting reduction method was used with secondary aluminum dross (SAD) as a new reductant. The effects of …
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Recovery of iron from copper flash smelting slags
Copper slag contains iron in the range of 42–45%, which can be recovered and recycled along with the contained copper to obtain an iron–copper alloy and a final …
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High-Performance Method of Recovery of Metals from EAF …
Furthermore, these slags contain up to 2% zinc, which is lost. Other processes like RHF, PRIMUS, OXYCUP, OXYFINES and Ausmelt [1,13,18,19,20] are less significant. These processes are intended for either zinc or iron recovery. ... It also allows recovery of iron in the form of an alloy suitable for further processing. It should also be ...
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Effects of Na2O additions to copper slag on iron recovery …
A new process for green and efficient utilization of copper slag was put forward. • Addition of Na 2 O in slag promoted magnetite growth but decrease magnetite quantity.. Slag with 4 % Na 2 O had a markedly decreased viscosity and iron recovery rate of 81.08 %.. Na 2 O in ceramics reduced sintering temperature but meantime degraded …
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Recovery of Metals from Copper Smelting Slag Using Coke …
With the purpose of recovering the metal values, in this study the copper slag was reduced by coke and biochar at 1250 °C in an argon gas atmosphere using the isothermal reduction/drop quenching technique. The phase compositions of metal, matte, and slag were determined using electron probe microanalysis (EPMA). The effects of …
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Innovative approach to recovery of iron from steelmaking slags
The iron element in electric arc furnace (EAF) slag is extremely difficult to recycle due to the low specific magnetic susceptibility of the RO phase (a solid solution of FeO, MgO, CaO, and MnO).
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Recovery of iron and removal of hazardous elements from …
Furthermore, copper slag is mainly composed of the fayalite (2FeO⋅SiO 2) phase, which means that iron could potentially be recovered from waste copper slag.Thus, we proposed adding a reduction stage as an additional step to the conventional copper smelting process in order to achieve both removal of hazardous elements and recovery …
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Recovery of iron from copper flash smelting slags
Flash smelting slags are cleaned in an electrical arc furnace, where coke is used as reductant and the copper content of the final slag decreases.1, 2 In addition, several practices of recovering metals from slags have been reported.3 – 7 However, copper slags contain other metals with commercial value than copper, such as iron, …
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Energy recovery from high temperature slags
Metallurgical slags are conventionally divided into ferrous and non–ferrous, based on the metal produced in each process. The typical chemical composition and generation rate of various slags for the major metal manufacturing processes are provided in Table 1, Table 2.As seen, the relative amount of slag produced per ton of iron/steel is …
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Granulation and Heat Recovery from Metallurgical Slags
A detailed evaluation of the cost and benefits of any heat recovery method is necessary based on the slag type and rate, target by-products, energy value to the plant and consumers, and processing costs. For example, the limitations of dry granulation could be the inability to recover iron from steel slags, post granulation.
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Hydrometallurgical Processes for the Recovery of Metals …
Abstract The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a blast furnace (BF), basic oxygen furnace (BOF), electric arc furnace (EAF), and sinter plant, as well as oily mill scale and pickling sludge. The review …
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Recovery of iron and removal of hazardous elements from …
A novel aluminothermic smelting reduction (ASR) process was investigated for cleaning waste copper slag; this process is not only able to recover valuable iron, but also eliminates hazardous elements from the end-of-life slag product.The effect of adding Al on the reduction of iron oxide and subsequent iron recovery from waste copper slag at …
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Copper Slag as a Source of Iron: An Overview | SpringerLink
The recovery of iron from copper slag is an economically feasible and environmentally significant process due to the increasing volume of slag in primary copper production and the potential for metal losses in discarded slag. ... Applying ausmelt technology to recover Cu, Ni and Co from slags. J. Met. 52(8), 30–33 (2000) Google Scholar
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Iron Recovery from Copper Slag Through Oxidation …
Large amounts of copper slag containing about 40 wt% iron is generated during the process of producing copper. Recovery of iron from the copper slag is very essential not only for recycling the valuable metals and mineral resources but also for …
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Recovery of iron from copper slag via modified roasting in …
A novel technology, modified roasting in CO–CO 2 mixed gas and magnetic separation, was presented to recover iron from copper slag. The effects of various parameters such as dosage of flux (CaO), gas flowrate of CO and CO 2, roasting temperature, roasting time, particle size of modified slag and magnetic flux density on …
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Iron Recovery from Nickel Slag by Aluminum Dross: …
Viscous behavior of slags during iron recovery from nickel slag by aluminum dross has been studied from 1773 to 1873 K. Additionally, the evolution of viscosity and structure in early and later periods of reduction process has been discussed, respectively. The following conclusions can be drawn based on the experimental results.
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(PDF) Metallurgical Processing Strategies for …
Slag produced as a byproduct in industrial processes, contains considerable metals contents, which need to be recovered to avoid environmental contamination. In present review, the types,...
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Recovery of iron from copper flash smelting slags
Copper slag is produced in large amounts in seven copper smelter plants in Chile, and it is estimated that around four million tons of slag are disposed every year, and another 40–45 million tons are historically cumulated. Copper slag contains iron in the range of 42–45%, which can be recovered and recycled along with the contained copper …
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Response characteristics of iron smelting reduction of copper slags
Abstract. The response characteristics of iron smelting reduction of copper slags were studied in this paper. With the molten slag basicity of 1·4, the γ (FeO) takes nearly a maximum value equalling to 4·27. The diffusion of (FeO) through the molten slag boundary layer to the molten slag–iron interface is found to be the rate-limiting step …
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Innovative approach to recovery of iron from steelmaking slags
Innovative approach to recovery of iron from steelmaking slags A. Semykina1,2, V. Shatokha*1 and S. Seetharaman2 The present work is aimed at the development of a new sustainable method for the utilisation of valuable elements from the steelmaking slag. In the framework of the innovative concept earlier proposed by the authors for utilisation ...
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(PDF) Recovery of iron from electric arc furnace slag: effect …
When n C/n O=0.8, and reduction-melting time is 60 min at 1320°C, the recovery rate of iron is greater than 86.1%, and the mass fraction of iron in iron nugget is about 94.8%. Read more Article
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Effect of CaO Addition on Iron Recovery from Copper …
Recently, some studies have attempted to recover iron from copper slags. Copper slags can be considered a novel "mining resource" because they contain iron of a very high grade, viz., 40 to 50 mass pct total Fe, which means that 14 to 15 million …
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Recovery of iron from lead-zinc metallurgical slags by bath smelting
The recovery of iron from iron sinking slag and lead smelter slag was investigated by desulfurization-reduction bath smelting. The effects of lead smelter slag (LSS) to iron sinking slag (ISS) mass ratio and temperature were investigated in desulfurization experiments. The X-ray diffraction (XRD) and X-ray fluorescence (XRF) …
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An approach of cobalt recovery from waste copper converter slags …
In this study, an approach was developed to recover Co from copper converter slags using pig iron as capturing agent. The recycle of Cu and Sn was also investigated. After the copper converter slag treated by the proposed process, the Co, Cu and Sn were effectively recovered in a Cu–Co–Sn–Fe alloy.
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Synergistic treatment of blast furnace slag and basic oxygen …
Therefore, BOF slag crushing-free to recover iron resources is the goal. In the future research, iron recovery from BOF slag without crushing by adjusting the physical phase composition was intended. To reduce the energy consumption in the actual production. At the same time, the iron recovery rate was improved to increase the …
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Recovery of iron from copper flash smelting slags
Hughes S: 'Applying Ausmelt technology to recover Cu, Ni and Co from slags', J. Met., 2000, 52, (8), 30–33. ... Iron recovery; Zero waste; Rights and permissions. 2011 Institute of Materials,Minerals and Mining and The AusIMMPublished by Maney on behalf of the Institute and The AusIMM.
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Recovery of low phosphorus iron from steel slag using …
2.2. Experimental procedure. The iron recovery experiment was performed in an electric tube furnace under an Ar atmosphere. First, the steel slag and quartz powder were mixed with various mass ratios according to Table 2.The mixtures were pressed into briquettes with a diameter of around 45 mm by a hydraulic press and then put into high …
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Recovery of Iron from Nickel Slag in Water Vapor at …
recovery of iron from nickel slags. MATERIALS AND METHODS Materials Nickel slag is a by-product of nickel smelting and was collected from a plant in China. It was crushed to particle sizes of less than 0.096 mm. The compo-sition of the raw nickel slag in …
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