· 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
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A considerable amount of heat energy is contained in the molten slag tapped from blast furnace.At present,the BF slag is treated by impinging much water for granulation and the energy is wasted without recovery.Thus,dry granulation technology has attracted more and more attention.The basic problems and technical difficulties of dry granulation were
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· After the link between crystallography and grain size distribution was understood, solutions could be pursued. Already during the second world war, compositional limits for disintegrating slags were defined (Parker and Ryder, 1942) defined, based on the stability field of C 2 S in the CaO–MgO–SiO 2 –Al 2 O 3 slag system, with an adjustment
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:Slag HeatHot SlagSlag From Steel ProductionTianhua ZhangThe RecHeat (Recovery of Heat from molten slag) technology innovation is based on the idea of an “as simple as possible to use”, heat exchanger type of technology for molten
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· Batch reactors were used to assess the technical feasibility of calcium carbonate recovery and its use for pre-treatment of acid mine drainage (AMD) from coal mines. The effects of key process parameters, such as the amount of acid (HCl/calcium molar ratio), the pH and the CO 2 flow rate were considered.
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In 2021, the crude steel production in the world was 1,951 million tons, with an average growth rate of 4.06% from 2000 to 2021. In the process of steel making, 12-15% of the steel output is waste
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· Iron Recovery from Waste Copper Slag by Using Coal and Secondary Aluminum Dross as Co-Reductants. In this work, a new and carbon-free reductant, i.e., secondary aluminum dross, is used to replace coal to recycle valuable metals from copper slag by smelting reduction. The influence of substitution….
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The temperature of molten steel slag produced by the steelmaking process is 1500°c~1700°c, and the total amount of energy contained is considerable. Therefore, the efficient recovery and utilization of sensible heat of steel slag has always been the focus of attention of the metallurgical field all over the world. However, at present, the average
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· To determine slag properties and the factors influencing these properties for optimization of operating conditions in the copper flash smelting process, the composition and microstructures of the quenched
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· Abstract and Figures. Using a software-based experiment design, the application of the leaching process for the extraction of manganese from Zinc Plant Slag (ZPS) was investigated. In this study
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· The second factor is that metal recovery from slag must be low cost (Wu et al., 2010). Since these criteria generally cannot be met, a large amount of the slag produced as a by-product is stored as waste in the plants ( Zheng and Kozinski, 1996 ).
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· By applying mineral processing technologies, such as crushing, grinding, magnetic separation, eddy current separation, flotation and so on, leaching or roasting, it is possible to recover metals such as Fe, Cr, Cu, Al, Pb, Zn, Co, Ni, Nb, Ta, Au, and Ag etc. from the slags. Recovery of metals from the slags and utilisation of the slags are
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· In the present paper, recovery of valuable metals from copper smelter slag of Balkhash copper plant (Kazakhstan) was investigated. To recover Fe, Zn and Cu to water-soluble form, the mixture of
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· 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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· Almost all copper slags contain a considerable amount of Cu (0.5–3.7%) close to or even higher than copper ores. Depending on the origins, some slags contain Co and/or Ni at levels worthy of recovery and utilization. Toxic elements (As) and heavy metals (Pb) exist in some copper slags (see slag 3 and slag 6).
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· Research highlights Bioleaching and recovery of metals from final smelter slag was studied. Metal yields after 29 days of leaching were 41% Fe, 62% Cu, 35% Zn and 44% Ni. Metals were subsequently precipitated using biogenic sulfide. Over 98% of Cu precipitated at pH ⩾ 2.8 and over 99% of Zn precipitated at pH ⩾ 3.9. The precipitation of
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Abstract. Silicate slags produced from smelting copper concentrates contains valuables such as Cu and Fe as well as heavy metals such as Pb and As which are considered hazardous. In this paper, various slags were characterized with several techniques: SEM-MLA, XRD, TG-DTA and ICP-MS. A recovery process was developed to separate the valuables
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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
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· Pyrometallurgical processing of lateritic ore produces huge amounts of ferronickel slags, which may contain valuable metals. This paper describes a novel hydrometallurgical route to recover metals from ferronickel slag samples and reduce liability matters using oxidative acidic leaching. Hydrochloric acid and hydrogen peroxide were
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· 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 and tabling of the −1 mm material would help recover 10 tpd of metal from the 18 tpd of mixed metal. Based on the studies, a plant is now operational at the Ferro-Alloy Plant (FAP
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· The recovery of copper and cobalt from ancient copper slags from the Küre region of T urkey was investigated. A fayalitic-type of ancient copper slag containing 1.24% Cu, 0.53% Co and 53.16% Fe
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· This slag, if cooled to 150 °C through the proposed system, can generate as much as 106 Nm 3 of CO + H 2 (molar ratio of H 2 :CO = 3:1) exiting the reactor at 1100 °C. This would represent chemical energy recovery of 0.24 GJ/ton crude steel (0.81 GJ/ton slag) or 51% of the slag thermal energy.
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: Felix Firsbach, Dieter Senk, Alexander Babich · The energy consumed in high temperature processing of metals is distributed between metal, slag, off-gas, and the natural losses to the atmosphere. The
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recovery of metalic slag from hotslag.md Find file Blame History Permalink first · ce629dbe liach2022 authored Oct 25, 2022 ce629dbe
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:Recovery From High Temperature SlagsM. Barati, S. Esfahani, T.A. Utigard · This review article evaluated and summarized various extraction methods including magnetic separation, roasting, pyrometallurgical method, hydrometallurgical and bio
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Spent automotive catalyst is a valuable source of platinum group metals (PGMs), making them crucial secondary resources. Currently, the main process for recovering PGMs from these catalysts is metal capture method. The smelting process would produce a significant amount of residual slags containing various components like SiO 2, Al 2 O 3, CaO
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· Carbothermal reduction at elevated temperature (near 1440 °C) helped recover a majority of the metal values (e.g., Fe, Cu and Mo) into the iron-rich alloy product which can be a feed material for steel making. On the other hand, the non-metallic residue, the secondary slag, can be used in the glass and ceramic industries.
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· In a small amount of works, Al 2 O 3 was used as a component for the oxygen potential controller in the process of slag refining. For example, Barati et al. [17, 20] have made some studies about
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· The recovery of cobalt from a copper converter slag, which contained over 2.4% Co and was accumulated as industrial waste, by reduction-sulfurization smelting was explored. Quantitative analysis of treated slag showed that activated carbon and ferrous sulfide can be used to settle cobalt into matte as Co–Fe alloy.
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· The alloy with a Cr grade of 70.84% and a V grade of 2.36% can be obtained by keeping SSS and stone coal at a ratio of 50 : 31 at 1600 C for 120 min. The corresponding recovery rates of Cr and V are as high
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