The sulfur recovery rate at 0–4 V; (b) and (c). The slag-metal cross section at 2 V and 4 V; (d) and (e). SEM and EDS results of Mo cathode and anode at 4 V; (f). ... And in the electric-field strengthening element recovery process, some slag-metal interface phenomena are also very important, such as interfacial capacitance, resistance to ...
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Copper slag is the main solid waste from the copper pyrometallurgical process [1].They are considered hazardous waste because they have significant concentrations of dangerous heavy metals [2].Every tonne of copper metal produced yields between 2.2 and 3 tonnes of copper slag, meaning that about 50 million tonnes of slag are produced annually worldwide [3], [4].
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Waste heat recovery from high temperature slags represents the latest potential way to remarkably reduce the energy consumption and CO2 …
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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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Currently, Electric Arc Furnace Slag (EAFS) is undervalued and is therefore only used in road construction, while blast furnace slag (BFS) is used as an interesting alternative in construction materials to replace natural aggregates in the manufacture of concrete. Steel slag (SS) represents a promising secondary resource due to its high content of critical metals, such …
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In order to identify the effect of the potassium cyanide (KCN) concentration on the metal recovery percentage for gold, silver and copper, a third experimental test was carried out. The results of this test showed that the highest percentage of gold recovery corresponds to the lowest concentration of KCN (0.06 g 1-1) used in the test .
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ORIGINAL ARTICLE Recovery of valuable metals from copper slag Changda Zhang1 & Bin Hu1 & Huaguang Wang2 & Mingyu Wang1 & Xuewen Wang1 Received: 15 February 2020/Accepted: 17 April 2020 # Society ...
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The effect of the initial (Al + Si)/MnO molar ratio and slag composition on MnO recovery from electroslag by remelting at 1773 K was investigated. High-purity aluminum metal and silicon were employed as the deoxidizers to effectively promote the recovery of manganese metal (MM). The reduction of MnO in slag, through the interaction between molten MM with a …
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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 highlights that dusts and …
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These findings could aid in the recovery of heavy metals from copper slag employing slow cooling and flotation, thereby lowering copper slag accumulation and mitigating environmental hazards. Graphical abstract. Download: Download high-res image …
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After the liquid steel slag is quenched and broken by high-pressure air, it enters the first waste heat recovery chamber to collect radiant heat, cools the slag into small crystal particles, and …
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Steel slag is a solid waste of the steel industry, produced during steel production. Three types of slag, namely electric arc furnace (EAF), basic oxygen furnace (BOF), and Linz-Donawitz processed slag (LD-slag) are the steel industry byproducts. That slag comprises precious elements including zinc (Zn), chromium (Cr), iron (Fe), nickel (Ni), silicon (Si), aluminum (Al), …
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In this paper, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag handling. The metals …
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The flotation concentrate was then subjected to bio-leaching in the presence of Acidithiobacillus Ferrooxidans bacterium for the recovery of metal values. The recovery values of about 74.0% of copper, 60.0% nickel, and 33.4% cobalt were achieved in the investigation.
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Metal from slag recovery plant at FAP, Bamnipal 6.1. The process 6.1.1. Comminution The comminution circuit is designed to produce a crushed slag with a narrow size distribution and to minimize the production of fines. Due to the abrasive nature of the slag, it was vital to select crushers which work on compressive crushing to minimize the wear ...
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Studies were carried out at R&D, Tata Steel to develop a flow sheet for the recovery of metal from metal–slag mix generated in its charge chrome (ferrochrome with 50–60% chromium) plant, Bamnipal. The studies showed that in the case of the charge chrome plant, crushing of mixed metal and slag to below 10 mm followed by jigging of the −10+1 mm material …
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The obtained distribution coefficients of Ni between matte or metal alloy and slag were well above 100, and values above 20 were reached for Co. For Cu, the values were generally 50 or higher after 60 min reduction. ... After leaching, the solution can be further processed through purification and metal recovery stages. Several recent review ...
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The recovery of metal from copper slag is of great signi cance to the resource utilization of copper slag and the . sustainable development of copper smelting industry.
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The main mechanism for the increased recovery of metals was through the chemical reduction of dissolved oxides by Si, ... Recovery of metal values from copper slag and reuse of residual secondary slag. Waste Manag., 70 (2017), pp. 272-281, 10.1016/j.wasman.2017.09.024.
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Gold Recovery Slag Granulation Process. chinese technology for blast furnace slag granulation process. gold recovery slag granulation process. Using dry slag granulation at integrated the last big heat recovery Check price recovery of metalic slag from hotslag In the basic oxygen process, hot liquid blast furnace metal… Read More
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In the past decade, pressure leaching has been employed for the recovery of valuable metals from minerals and has achieved favorable results (Liu et al., 2021a).Tian et al. (Tian et al., 2019) proposed a technology for vanadium extraction from VS under microwave and oxygen pressure, achieving an ideal leaching efficiency of 96 %.Wu et al. (Wu et al., 2018) …
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BF slag through a hydrometallurgy technique using H 2 SO 4 as a leaching agent. The recovery investigation has also reported that the codissolution of inorganic metal oxides such as MgO,
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Methods for metal recovery from solid/liquid waste streams are critically reviewed. ... 2018), and steel slag (Guo et al., 2019), can be used as the partial replacement for concrete production. These wastes can be used as the binding material since they contain high amount of silicates and alumina and also possess pozzolanic properties.
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Incineration slag is a relatively new ever-increasing slag. Over recent years, several studies have been reported on the treatment, utilisation and metal recovery from incineration slag, mostly in Germany and Japan (Kaulbarsch et al., 1997, Pretz and Meier-Kortwig, 2000, Schmelzer et al., 1996, Sakai et al., 2000).Incineration slag processing by mechanical separation can …
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Valorization of copper smelter slag through the recovery of metal values by a synergistic bioprocess system of bio‐flotation and bio‐leaching. May 2022; Environmental Quality Management 32(2)
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Reduction of CO 2 emissions from the steelmaking process is strongly required for prevention of global warming. One promising heat resource that is estimated to have great potential for …
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Studies were carried out at R&D, Tata Steel to develop a flow sheet for the recovery of metal from metal–slag mix generated in its charge chrome (ferrochrome with 50–60% chromium) plant, Bamnipal. The studies showed that in the case of the charge chrome plant, crushing of mixed metal and slag to below 10 mm followed by jigging of the −10 ...
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The crucibles were then weighed and broken to separate the metal (iron-rich alloy) and the secondary slag. Metal recovery was estimated from the weights and the hardness (VHN) and density (g/cc) of the secondary slag phase was also measured. As stated above, two starting compositions were examined by varying the amounts of fluxes so that the ...
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for recovery of metal from Ni con verter slag. The reduction processes were car- The reduction processes were car- ried out in electric furnace containing corundum (Al 2 O 3 ) crucibles t o melt the
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The copper smelting process produces plenty of copper slag every year, which is a hazardous solid waste, but a secondary resource. In the present study, the extraction of copper, nickel, and cobalt from copper slag was investigated through the process of sulfation roasting–water leaching and the process of sulfation roasting–sulfate decomposition …
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One of the greatest environmental challenges in metal extraction is the generation of a large amount of slag. Most of these slags contain insufficient amounts of valuable metals for economical revalorization, but these concentrations may be harmful for the environment. At present, more than 80% of the global copper products are obtained by the smelting process, …
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Compared with traditional water quenching method, the dry treatment method does not consume water resources, and it can recover the heat contained in blast furnace slag.
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