Technospheric Mining of Critical and Strategic Metals from …
The technosphere consists of material stocks accumulated by human activities, which can include processing residue, such as slag. Various smelting processes generate slag, and some valuable elements are concentrated in this by-product. In this review, the extraction of critical and strategic metals from non-ferrous slags is discussed. Critical and strategic metals …
Development of a Flowsheet for Recovering Copper and …
The European Journal of Mineral Processing and Environmental Protection Vol. 2, No. 2, 1303-0868, 2002, pp. 94-102 Technical Note Development of a Flowsheet for Recovering Copper and Tin from Copper Refining Slags F. Arslan 1*, K. Giray2, G. Önal1, V. Gürkan 1 Istanbul Technical University, Mining Faculty, Mining Engineering Department
VII International Conference on Molten slags, fluxes
Mining and Metallurgy, particularly Karen du Toit and Nazli Mamdoo, for doing the bulk of the practical work with regards to receipt of the papers and arranging for refereeing, and Dawn van der Walt and Zuliakha Malgas for the production of this well- ... Plenary Address: Electrochemical processing using slags, fluxes and salts
How can metal mining impact the environment?
Modern mining operations actively strive to mitigate potential environmental consequences of extracting metals, and such operations are strictly regulated in the United. ... Slag is a by-product of the smelting process. Most slags, because they are composed primarily of oxidized, glassy material, are not as significant a potential source of ...
Clean recycling of Zn-bearing slags by a plasma fuming process
Slag fuming is a traditional technology for the treatment of Zn-bearing slags [10], [11]. In this process, oxides, such as zinc oxide (ZnO) and lead oxide (PbO), are reduced by various reductants such as carbon (C), carbon monoxide (CO), and pyrolysis gas and evaporate from the molten slag bath [12], [13], [14].
The recycling and reuse of steelmaking slags — A review
During the steelmaking process, various slags are produced as by-products (Shen and Forssberg, 2003). The first stage of steel production is blast furnace steelmaking, in which raw iron ore is converted into pig iron, which contains various amounts of carbon, silicon, manganese, sulfur and phosphorus. ... with the advantages of lowering mining ...
Recovery of metal values from copper slags by flotation and …
The recovery of copper and cobalt from ancient copper slags from the Küre region of Turkey was investigated. A fayalitic-type of ancient copper slag containing 1.24% Cu, 0.53% Co and 53.16% Fe were subjected to an experimental study. Two different routes were followed to recover the metal values. The first route was roasting the slag with pyrite followed by leaching. …
Current State Of Copper Smelting Slags And Their Processing…
The review article is devoted to the current state and ways of solving one of the most pressing and complex problems in copper metallurgy - the reduction of irrecoverable losses of metal with dump slags and the creation of environmental technology. A comprehensive solution to the problem with the use of physicochemical methods of influence on the melt is proposed.
A review on the metallurgical recycling of vanadium from slags…
This process is aimed at breaking down the iron phases which have surrounded the vanadium and chromium spinels (Eqs. (1), (2)) [43, 59, 62, 63], thereby enabling the self-formation of acid leachable species such as CaV 2 O 7 and Mg 2 VO 7. Thus, the process is subjected to treat slags containing high CaO/MgO.
The Importance of Metallurgical Slags and Their Evaluation
Smelting, the process of extracting base metals from their natural states (ores), has been used since the bronze age to create precious and useful metals. Ore is decomposed in smelting with heat and a chemical reducing agent such as calcium, driving off other elements as gases or slag and leaving the metal base behind.
Hot stage processing of metallurgical slags
To avoid landfill costs and ecological issues, the slags are usually processed into a secondary resource (Fig. 1).The first step in this slag treatment is often the recovery of valuable and hazardous metals from the slag (Shen and Forssberg, 2003).The metal fraction can be recovered by mechanical and/or physical processes including crushing, grinding, magnetic …
Sequential Bioleaching of Pyritic Tailings and Ferric Leaching …
In this work, we proposed a method for biohydrometallurgical processing of mining (old pyritic flotation tailings) and metallurgical (slag) wastes to recover gold and other nonferrous metals. Since this processing allows the removal of toxic metals or at least decreases their content in the solids, this approach may reduce the negative environmental impacts of …
Management of mineral processing tailings and …
Mining activities lead to substantial quantities of tailings and slags containing metallic trace elements (MTE), leave persistent pollutants in the environment and are toxic …
The volume stability of modern steelmaking slags
The main cause of volume instability is hydration of free lime, although hydration of free magnesia may also contribute in some cases. There are three key steps to effective use of this …
Mineralogical and geochemical characterization of high …
Here, we present detailed electron microprobe analyses and age data of high-medieval lead–silver smelting slags. The mineral composition data provide a database of all silicate and oxide phases in the slag. Bulk chemistry as well as mineral composition is used to reconstruct liquidus, solidus, and viscosity of the slag melt. By calculating the mass balance of …
Steel Slag
Carbon dioxide sequestration using steel slag—modeling and experimental investigation. Smitha Gopinath, Anurag Mehra, in Carbon Dioxide Sequestration in Cementitious Construction Materials, 2018. 4.1 Introduction. Steel slag is an industrial waste that is generated during the production of steel. In the production of steel, oxides of metal impurities in the iron combine …
Processing of Non-Ferrous Metallurgy Waste Slag for its …
The article presents an overview of the methods of processing slag from Waelz process, and various approaches employed by scientists globally, aimed at processing such slags. Despite several listed methods of processing slag from Waelz process, none entails a sufficient complex nature of its processing. In addition, the slag processed from the Waelz …
The volume stability of modern steelmaking slags
Mineral Processing and Extractive Metallurgy: Transactions of the Institutions of Mining and Metallurgy: Create email alert. Restricted access. Research article. ... MOTZ H., and GEISELER J.: 'Products of steel slags an opportunity to save natural resources', Waste Management, 2001, 21, 285–293. Crossref. Google Scholar.
How to Process Slags (with detailed process)?
What is slag? Slag is fully named ground-granulated blast-furnace slag (GGBFs), a by-product produced by metallurgical smelting plants. In addition to iron ore and fuel (coke), appropriate limestone and dolomite …
TENORM: Copper Mining and Production Wastes | US EPA
Converting: Finally, matte copper is converted into a copper-rich slag, which is then returned to the leaching process and separated from "blister copper," which is sent to another furnace for casting. Waste Generation. Copper mining wastes make up the largest percentage of metal mining and processing wastes generated in the United States.
pH Dependent Leaching Behavior of Zn, Cd, Pb, Cu and As from Mining
From the Middle Ages until the beginning of the twentieth century, extensive Zn–Pb mining and smelting was carried out in East-Belgium. By lack of waste treatment techniques and sustainable management practices, metal-bearing slags and unprocessed waste were dumped in huge tailings, which still represent an important source of contamination. A …
A Review on Environmental Concerns and Technological
Mineral process wastes, such as metallurgical slags nowadays, are of significant metals and materials resources in the circular economy. The usability of iron-making slag is …
Application of Physical and Chemical Methods for Processing Slags …
Almalyk Mining and Metallurgical Combine (AMMC) uses flotation slag processing tec hnology. The common disadva ntage of all these methods is that t hey process the already solidified slags and do ...
Utilization possibilities of steel slag as backfill material in …
Steel slags are identified with the waste code 10 02 01 (slag processing wastes) and 10 02 02 waste code (untreated slags) in the Annex-4 list (waste from the iron and steel industry) of the Waste ...
Management of mineral processing tailings and …
This study focused on the management of mineral processing tailings and metallurgical slags of the Congolese copperbelt. The aim was to analyse their storage …
Scoping Study of the Upgrading of Fluxed and Fluxless …
upgraded slag (UGS) process is established for upgrading titania slags with high levels of alkaline earth impurities, such as Ca and Mg (Borowiec et al., 1998; Doan, 1996). In the UGS process, the phase composition of the slag is modified to increase the leachability of the impurities. The UGS process is
Gold Solubility in Smelting Slags for the Recycling of
Gold mine tailings contain gold about 1-2 mg/kg. This is the reason why Au-containing materials such as e-wastes and mining wastes are highly important sources . From the viewpoint of pyrometallurgical processing, the distribution ratio of gold between metal and slag and the solubility of gold in slags have been scarcely reported.
Slag recycling and reuse – GREENY approach
In addition to the beneficiation process development, a new simulation tool is developed which can be used for planning and optimization of the process for various secondary raw materials. The simulation tool covers the whole refining process starting from slag by introducing respective modelling capabilities as a customization of the workflow.
Distribution of elements between copper and FeOx–CaO–SiO2 slags …
DOI: 10.1179/1743285513Y.0000000043 Corpus ID: 135799009; Distribution of elements between copper and FeOx–CaO–SiO2 slags during pyrometallurgical processing of WEEE @article{Anindya2013DistributionOE, title={Distribution of elements between copper and FeOx–CaO–SiO2 slags during pyrometallurgical processing of WEEE}, author={A. Anindya …