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Arsenic is the 20th abundant metalloid element in the earth's crust, with a terrestrial abundance of 2–3 mg/kg (Sarkar and Paul, 2016), naturally occurs in over 300 different minerals major in the form of arsenates, sulfides, sulphosalts or oxides (Drahota and Filippi, 2009; Long et al., 2012), and seeps into the human production chain and living environment mainly through …
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The microwave irradiation is used to the oxidative roasting of copper sulfide concentrate in the presence of CaCO 3 with the aim of eliminating sulfur dioxide emissions and accelerating roasting process. The calcine obtained is leached with NH 3 –(NH 4) 2 CO 3 solution for the recovery of copper. It is shown that the copper extractions from the calcine roasted with …
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Industrial processes like mining, metallurgy produce metallic wastewater, which is a potential source for recovering valuable metals. The distinctive properties of this wastewater include high levels of heavy metals and low pH and COD levels (Kumar et al., 2021; Liang et al., 2022).Sulfide minerals found in ores and tailings in mining operations are oxidized upon …
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Recently, microwave technology has been widely used in various mineral processing and metallurgical extraction processes, such as microwave calcination, microwave carbothermal reduction of ilmenite, microwave roasting of sulfide ore, microwave-assisted waste activated carbon regeneration and microwave-assisted treatment of waste, due to its rapid …
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We address the synthesis of six environmentally friendly binary MSs that have been obtained by microwave-assisted heating: ZnS, SnS x (x = 1,2), CuS, Fe 2 S, Bi 2 S 3, …
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Microwave-assisted smelting and reduction in mineral processing are gaining recognition for their efficiency and environmental benefits. A review of the microwave treatment of minerals indicates that while some minerals are transparent to microwave radiation, others, …
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The microwave irradiation is used to the oxidative roasting of copper sulfide concentrate in the presence of CaCO 3 with the aim of eliminating sulfur dioxide emissions and accelerating roasting process. The calcine obtained is leached with NH 3 –(NH 4) 2 CO 3 solution for the recovery of copper. It is shown that the copper extractions from the calcine roasted with …
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The invention relates to a multifunctional microwave smelting equipment which has sulfide ore powder desulfurizing-baking and nitriding functions and belongs to ore smelting equipments. A main machine consists of a structural machine frame, a micro generation and control device, an infrared temperature measuring device, an automatic control device, a continuous feeding …
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Alkaline sulphide leaching processes have been widely used for the arsenic selective removal from metallurgical wastes. However, high consumption of energy and chemicals as well as long extraction time have forced the industries to find more cost-effective and eco-friendly separation techniques. ... Microwave-enhanced selective leaching of ...
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Copper smelting flue dust (CFD) is a byproduct of pyrometallurgical copper production, containing valuable metals like lead, zinc, and copper, but also hazardous arsenic, which complicates its handling and recycling. Traditional methods for arsenic removal from CFD, such as pyrometallurgical and hydrometallurgical processes, are often inefficient or result in the …
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A novel microwave roasting technology for formation of ZnO from zinc sulfide concentrate is presented. The dielectric properties and thermal behaviors of zinc sulfide concentrate and ZnS, CaO, MgO ...
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Smelting happens to be one of the main steps in extraction of metals from sulfide and oxide minerals via the pyrometallurgical route. It is essentially an operation of melting and slag/metal ...
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methods, such as matte smelting for copper–iron separation, can show ... Oxide–sulfide anion exchange chemistry exacerbates the thermodynamic differences between metal compounds, illustrated ...
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Antimony sulfide (Sb 2 S 3) concentrate is the main source for the production of antimony oxides and metallic antimony.Few researches have focused on preparing Sb 2 O 3 crystals and Sb 2 O 3 nanomaterials from minerals directly. In this research, a clean, short, direct preparation of Sb 2 O 3 crystals and nanomaterials via microwave oxidation roasting using …
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Download Citation | Sulfide Smelting | In recent years, roasting and smelting of sulfide concentrates are simultaneously carried out in a single furnace. The process known as flash... | Find, read ...
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A kind of microwave desulfurization plasma smelting directly obtains the method for high ice nickel.This method has been got rid of the operation of bessemerizing in the copper nickel oxidized ore tradition metallurgical technology, adopts microwave desulfurization plasma metallurgy directly to obtain high ice nickel and elementary sulfur.The height ice nickel grade …
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Microwave technology has been confirmed to be suitable for use in a wide range of mineral leaching processes. Compared to conventional leaching, microwave-assisted leaching has significant advantages. It is a proven …
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Here, we propose a clean one-step microwave carbothermic reduction process for direct reduction of antimony sulfide concentrate to metallic antimony using ZnO as the sulfur …
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Pyrometallurgical smelting and refining is the dominant method of extracting Ni from sulfide concentrates [14, 15].Prior to refining, the concentrate is smelted in an oxidizing atmosphere to yield a Ni-rich matte while simultaneously oxidizing the iron to iron oxide; the iron oxide is fluxed with silica to form an iron silicate slag that is immiscible with the matte [[16], [17], …
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Microwave-Leaching of Copper Smelting Dust for Cu and Zn Extraction. Behrouz Sabzezari, 1 Seyed Mohammad Javad Koleini, 1, * Sina Ghassa, 2, * Behzad Shahbazi, 1 and Saeed Chehreh Chelgani 3, * ... The sulfide minerals (such as chalcocite) have a very low solubility on sulfuric acid. Thus, it would be essential to use an oxidant for increasing ...
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Sulfide smelting is one element in this transformation process that requires an interactive communication with geology, mining, processing, refining and products to provide in a sustainable manner, valuable metals to enrich modern life. Extraction 2018 is an effort to move into the right direction. For a few days, experts from different fields ...
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The invention discloses a smelting method of zinc sulfide concentrate, which comprises the steps of mixing and granulating the zinc sulfide concentrate and manganese dioxide, placing the mixture in a horizontal vacuum furnace with microwave radiation, carrying out microwave radiation for a certain time under a vacuum condition, and obtaining crude metal zinc and manganese-rich …
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Effect of sulfuric acid concentration (a), solid content (b), microwave power (c), HNO 3 concentration (d) and process time (e) on Cu recovery (other parameters are held at center level).
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In this study, the microwave absorption capabilities and heating rates of the main minerals in a typical complex copper–nickel sulfide ore in the Jinchuan deposit were …
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In this work, a feasible microwave-enhanced leaching process was developed for arsenic selective removal from copper smelter dusts, and arsenic leaching efficiency could …
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Another option for gold smelting is a 1,200-watt microwave. It is necessary that the magnetron in the microwave is located on the side or back rather than on the top. It is possible to purchase a microwave gold smelting kit or a kiln which you can then place on a kiln shelf in the microwave.
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The microwave irradiation is used to the oxidative roasting of copper sulfide concentrate in the presence of CaCO3 with the aim of eliminating sulfur dioxide emissions and accelerating roasting ...
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smelting furnaces is being hampered by high equipment ... sulfide ore, and microwave treatment of tailings.12–16 As compared with conventional roasting, microwave heating
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Materials 2019, 12, 1822 4 of 18 Figure 3. The microwave-leaching set-up (1: microwave chamber; 2: Teflon reactor; 3: controller; ‐ ‐ 4: mixer; 5: condenser reflux). 2.3. Leaching Procedure 2.3.1. Oxidant Presentation The sulfide minerals (such as chalcocite) have a …
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Advances in Sulfide Smelting Part of the Extraction 2018 global extractive metallurgy conference This technical scope of this symposium examines all aspects of sulfide smelting technology, including basic principles, technology, and current operating practice. Papers that describe innovative methods for achieving impurity separation and
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