Application of coal-based direct reduction-magnetic …
Non-Ferrous Metallurgical Wastes, including copper slag, red mud, jarosite residue, zinc-bearing dust, pyrite cinder, and nickel slag, are hazardous waste products released during the metal extraction process. Metallurgical solid wastes pose significant risks to the environment due to their content of hazardous elements, which may impact the quality of surface water and …
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Separation of Iron and Zinc Values from Blast Furnace Dust …
The roasting slag was separated by magnetic separation (350 mT), and the concentrate with the iron grade of 66.00%, the recovery rate of 85.54%, and the zinc grade of 0.15% was obtained under the conditions of roasting temperature of 700 ℃, roasting time of 30 min, and sawdust as 10% of the BFD mass.
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Investigation on purification of α-Fe2O3 from zinc …
by conventional magnetic separation technology. Iron oxide was the principal constituent in zinc smelting iron slag, which was commonly treated by roasting to get α-Fe 2 O 3. Consequently, the extraction of α-Fe 2 O 3 from the zinc smelting iron slag can help to protect the environment and achieve economic value. High gradient magnetic
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Steelmaking Slag Beneficiation by Magnetic …
After BOF slag was oxidized at 1300 ℃ for 240 min and cooled in the furnace (1 ℃/min), the grade of magnetic slag obtained by magnetic separation had a grade of 40.26%, a recovery of 70.95% ...
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Exploring the Efficiency of Magnetic Separation and Gravity
The presented work offers an innovative process scheme for valorizing Pb-Zn slag, which involves crushing, grinding, and separation techniques to concentrate valuable components (non-ferrous metals). This methodology could have a significant impact on the global beneficiation of metallurgical slags since it is significantly more simple, environmentally friendly, and cost …
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An air-fluidized magnetic separator and its separation …
The presence of magnetic inert minerals (RO phase, Fe 3 O 4, Fe) in steel slag powder 13 enables the separation of these minerals from the slag to enhance its gelling properties and facilitate iron resource recovery, thereby improving the activity of steel slag powder. 14 However, during wet magnetic separation operations, hydrated active minerals, …
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Recovery of valuable elements from pyrite pyrolysis slag using magnetic …
The pyrrhotite in the pyrolysis slag is magnetic, and lead and zinc mainly exist in the form of sulfide, which has good floatability. This inspired us to purify pyrolysis slag by magnetic separation and flotation method. The results show that when the grinding particle size of −0.040 mm accounts for 80.1 %, the content of Pb and Zn in ...
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Separation and stabilization of arsenic in copper smelting wastewater
Zinc slag dissolves in wastewater and releases iron and other ions (e.g., calcium and aluminum) to co-precipitate with arsenate into small irregular particles, which gradually converge into large clusters over time. ... Design and synthesis of magnetic microcapsules based on n-eicosane core and Fe 3 O 4 /SiO 2 hybrid shell for dual-functional ...
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Recovery of Zinc and Copper from Lead Slag by the …
The valuable metals copper and zinc were successfully recovered from a water-quenched lead smelting slag containing zinc in Gansu Province. This study focuses on the application of the direct reduction roasting-flotation process for extracting these metals from the slag phase. To comprehend the recovery principle of copper and zinc minerals in the slag …
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Recovery of Iron from Copper Tailings Using a Combined
Direct reduction refers to the process of reducing iron minerals in copper slag to metallic iron particles below the melting temperature of copper slag [].Using direct reduction–magnetic separation technology to recover iron resources in copper slag has fair recovery effect and short reaction time, which is the development trend of comprehensive …
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One-Step Synthesis of Magnetic Zeolite from Zinc Slag …
Report Hall [8] reported that the output of zinc metal was 5.681 million tons in 2018. The discharge of zinc slag in China was about 5.45 million tons, and its historical stockpiling volume exceeded to 100 million tons according to the production of each ton of zinc metal to discharge 0.96 tons of zinc slag [9].
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JRM | One-Step Synthesis of Magnetic Zeolite from Zinc Slag …
One-Step Synthesis of Magnetic Zeolite from Zinc Slag and Circulating Fluidized Bed Fly Ash for Degradation of Dye Wastewater. Zhichao Han, Yaojun Zhang *, Panyang He. College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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Recovery of valuable elements from pyrite pyrolysis slag …
When the pyrolysis slag is treated by the magnetic separation process, due to the loose structure of the pyrrhotite, a strong magnetic agglomeration is formed, and the …
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Exploring the Efficiency of Magnetic Separation and Gravity …
An air-fluidized magnetic separator and its separation …
In order to address the issue of magnetic agglomeration leading to poor magnetic separation efficiency and low activity enhancement, resulting in limited utilization of steel slag …
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Recovery of zinc from galvanizing dross by a method of …
DOI: 10.1016/J.JALLCOM.2017.11.385 Corpus ID: 140007627; Recovery of zinc from galvanizing dross by a method of super-gravity separation @article{Wang2018RecoveryOZ, title={Recovery of zinc from galvanizing dross by a method of super-gravity separation}, author={Zhe Wang and Jintao Gao and Anjun Shi and Long Meng and Zhancheng Guo}, …
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Superconducting magnetic separation of ground steel …
Steel slag was obtained from a steel making company in Korea. The slag was in granular type with diameter of 5-7 mm and the slag was milled before the magnetic separation. The ground slag powder was sieved with a 200 mesh sieve and the finer than 75 µm was used for the magnetic separation experiment. The particle size distribution of slag
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Comprehensive recovery of zinc, iron and copper from copper slag …
In this study, a novel method to recover copper, zinc and iron from copper slag by SO 2 –O 2 roasting-leaching-magnetic separation was proposed. The effect of roasting experiment conditions were roasting temperature of 900 °C, holding time of 120 min, and φ SO2 (The volume fraction of SO 2 in the mixed gas of SO 2 and O 2) of 90%.Under the leaching …
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A review on lead slag generation, characteristics, and …
Based on the aforementioned results, iron in lead slag was recovered by direct reduction after magnetic separation. Lead and zinc are effectively volatilized under high temperature reducing conditions. Through the recovery of lead and zinc from lead slag, zinc and lead can be resourcefully utilized and environmental problems can be solved.
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Slag Separation
Slag processing. George C. Wang, in The Utilization of Slag in Civil Infrastructure Construction, 2016 5.4.2.12 Self-dissolving. In this method, hot steel slag is put into a sealed pressure tank, holding approximately 100 kg (220 lb) of steel slag (it can be a smaller or larger amount depending on the trial scale) (SRIM, 1982).Molten steel slag can produce large amounts of …
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Application of coal-based direct reduction-magnetic …
However, the iron content in non-ferrous metallurgical solid wastes such as copper slag, red mud and zinc-containing dust can often reach 30–50%, which is higher than the average iron grade (27%) of the iron ores found in China and has a high utility value. ... A novel process to upgrade the copper slag by direct reduction-magnetic separation ...
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WET MAGNETIC SEPARATION OF IRON FROM FINE …
efficient recycling of iron mainly include dry magnetic separation of bulk slag, wet stage grinding and magnetic separation, wet magnetic separation for full grain level, fine-grained level …
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Separation of Iron and Zinc Values from Blast Furnace …
In the present work, roasting BFD with sawdust and mag-netic separation was proposed to separate iron and zinc from blast furnace dust and recover iron eficiently. The optimal …
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Novel Process for Comprehensive Utilization of Iron …
The content of arsenic is about 0.4–1.5% in the iron concentrate recovered from zinc kiln slag, which also restricts the concentrate's application in iron and steel industry . Silver occurs mostly as silver sulfide with a fine particle size in zinc kiln slag, and the silver sulfide is usually encapsulated in FeS and Fe 3 O 4.
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JRM | One-Step Synthesis of Magnetic Zeolite from Zinc Slag …
In this study, a magnetic P zeolite was directly synthesized by utilization of industrial solid wastes of zinc slag (ZS) and circulating fluidized bed fly ash (CFBFA) via one …
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Recovery of iron from pyrite cinder by suspension …
Mineralogical characterization and speciation of sulfur, zinc and lead in pyrite cinder from Bergvik, Sweden. Appl. Geochem., 131 ... Reclaiming of ironresource from sulfuric acid slag by magnetizing roasting-magnetic separation and transformation of iron phase therein. Mining and Metallurgical Engineering, 38 (4) (2018), pp. 41-44.
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Magnetic separation-sulphuric acid leaching of Cu–Co–Fe …
Slag minerals processing is not suitable for the treatment of slag containing nickel, cobalt and zinc, because these metal values generally are recycled continuously from slag to concentrate (and vice versa) ... Combining magnetic separation test results, the total recoveries of cobalt and copper by MS-SAL process were calculated to be 95.57% ...
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Comprehensive recovery of lead, zinc, and iron from
Lead, zinc, and iron were recovered from jarosite residues using direct reduction followed by magnetic separation. The influence of the coal dosage, reduction temperature, …
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Innovative methodology for comprehensive and harmless …
Copper slag is a waste generated from pyro-metallurgical production of copper (Potysz et al., 2015).Typically, copper smelting slag contains about 1 wt.% Cu and 40 wt.% Fe with a great deal of silica (SiO 2) and minor amounts of other elements (Ni, Pb, Zn, As) (Gbor et al., 2000).It is estimated that for every ton of copper metal produced, approximately 2–3 tons …
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Exploring the Efficiency of Magnetic Separation and Gravity
Pb-Zn slag separation under low magnetic field conditions was not successful, according to the data presented. More specifically, the Cu content in thi s fraction wa s lower than that of the input raw
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Eco-friendly iron extraction from fe-containing copper smelting slag
The zinc content of the raw ore is very low, with most of the zinc in the form of zinc oxide (ZnO) ... A novel process to upgrade the copper slag by direct reduction-magnetic separation with the addition of Na2CO3 and CaO. Powder Technol., 347 (2019), pp. 159-169, 10.1016/j.powtec.2019.02.046.
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