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Blast furnace smelting is the dominant ironmaking method around the world. Blast furnace operations cover not only blast furnace smelting but also a set of auxiliary processes and equipments,…
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It was found that the maximum Ga and Zn leaching efficiencies of 81.22% and 96.72% were obtained at optimum leaching conditions: the leaching temperature of 90°C, the leaching time of 60 min, 3 M ...
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molybdenite dust leaching solution, the remaining filtrate containing 109mg/dm3 Re, 63mg/dm3 Mo, 16mg/dm3 Cu and 3.1mg/dm3 Ca was used for adsorption of Re by ion exchange resins. 2.2 Procedures and analysis The resins viz. Purolite A-170 and Purolite A-172 used in the experimental study were subjected to the pretreatment using H 2SO 4 ...
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Arsenic is selectively extracted from high-arsenic dust by NaOH–Na 2 S alkaline leaching process. In the leaching arsenic process, the effects of alkali-to-dust ratio, sodium sulfide addition, leaching temperature, leaching time and liquid-to-solid ratio on metals leaching efficiencies were investigated.
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Arsenic impurities in zinc oxide fume leaching solution were removed by ferric salt precipitation combined with oxidation. The effects of reaction time, reaction temperature, pH value of solution, oxygen flow rate, and ultrasonic power on arsenic removal were studied. The experimental results show that, under the conditions of …
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By using different acidic solvents and leaching conditions to treat the bag dust, the best leaching conditions of K, Na and Zn elements were explored. The results show that the optimal leaching conditions of harmful elements in water solution are: 4 ml/g liquidsolid ratio, 50°C temperature, 30 min stirring time.
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Crude zinc oxide (C.Z.O.) is one of the important resource of zinc metal extraction. The main source of crude zinc oxide includes: a. zinc dust collected from EAF (electrical arc furnace); b. fume dust collected from zinc leaching residue treatment by waelz kiln; c. zinc fume dust collected from lead slag treatment by fuming furnace; d. zinc skim from steel …
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The paper deals with the extraction of copper from the deposited material of the liner of the electrostatic precipitator (ESP) of the copper smelter plant. These precipitates of ESP liner (ESP dust) generally contain mixed phases of copper and arsenic. An attempt is made to extract copper from ESP dust, subsequently removing arsenic …
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In addition, one of the common methods of treating secondary resources is the acid-leaching method [16][17][18]. In the acid leaching process, the soluble zinc phases in the dust are dissolved in ...
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In this paper, water leaching and acid leaching were combined to treat secondary dust of a rotary hearth furnace to achieve zinc enrichment. First, the solubles ZnCl 2, KCl, and NaCl in the dust were dissolved into the water solution through water leaching treatment, and separated from the other insoluble components in the …
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This work focuses on the leaching of blast furnace (BF) dust under normal conditions of temperature and pressure in dilute sulphuric acid. Leaching experiments were carried out using a solution of ...
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Combined water leaching-Na 2 CO 3 leaching is an efficient approach for significant debromination and selective separation of Cu, Pb, and Zn from WPCBs smelting flue dust. 63.55% Br and 96.34% Zn were separated during water leaching, while Cu, Pb and Sn mainly enriched in the residue.
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The separation of Cu, Pb, Zn, and As from copper smelting dust through oxidative alkali leaching and sulfide precipitation, as well as the subsequent recovery of As through calcification precipitation and carbothermal reduction, were realized in this study to utilize resources from and safely treat copper smelting dust. The binding behavior of …
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Li et al. (2015) adopted acid leaching treatments with flue dust as the raw material, but the treatment effect was sub-optimal. Valuable metals were not separated or recovered at high rates. Xing et al. (2014) used sulfuration roasting to treat highly concentrated As-containing Zn dust. The As removal rate was only 70.39%.
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DOI: 10.1016/J.MINENG.2003.10.030 Corpus ID: 95695647; Characterization of basic oxygen furnace dust and zinc removal by acid leaching @article{Kelebek2004CharacterizationOB, title={Characterization of basic oxygen furnace dust and zinc removal by acid leaching}, author={Şadan Kelebek and Sedat …
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Copper smelting open-circuit (CSO) dust contains various valuable metals, such as copper, lead, and zinc, as well as undesirable toxic elements such as arsenic. Thus, the comprehensive recovery of valuable elements from CSO dust is highly significant from both economic and environmental perspectives. In this review, …
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It was found that the maximum Ga and Zn leaching efficiencies of 81.22% and 96.72% were obtained at optimum leaching conditions: the leaching temperature of 90°C, the leaching time of 60 min, 3 M H 2 SO 4, the solid-to-liquid ratio of 1:5 (g/mL), and the ultrasound power of 750 W. In all cases, the leaching effect of Zn is not significantly ...
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DOI: 10.1016/j.jclepro.2021.129054 Corpus ID: 239086677; Efficient bromine removal and metal recovery from waste printed circuit boards smelting flue dust by a two-stage leaching process
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In addition to dust removal, it effectively eliminates odors, pet dander, and volatile organic compounds (VOCs) from the air. Specs. Specification. Honeywell HPA300. Coverage area: 465 sq. ft. CADR: 300 CFM (Smoke) 300 CFM (Dust) 300 CFM (Pollen) Filter Type: Pre-filter Carbon and True HEPA filters.
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Learn why wiping or vacuuming is better than blowing off the dust before applying finish to your wood projects. Blowing off the dust can damage the wood and …
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The leaching residue (mainly Fe 2 O 3) can be used as raw material in the iron-making industry. The flow chart of the technological process is shown in Fig. 1. The iron-rich leaching residue can be utilized to produce high-value materials [34], [35], [36]. Download: Download high-res image (206KB) Download: Download full-size image; Fig. 1.
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Ma AY, Zheng XM, Li S, Wang YH, Zhu S (2018) Zinc recovery from metallurgical slag and dust by coordination leaching in NH 3 –CH 3 COONH 4 –H 2 O system. R Soc Open Sci 5:180660. Article Google Scholar Chen WS, Shen YH, Tsai MS, Chang FC (2011) Removal of chloride from electric arc furnace dust. J Hazard Mater …
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The technical and environmental aspects of treating electric arc furnace dust (EAFD) using a novel process including alkaline roasting and organic acid leaching were evaluated and compared to the globally applied conventional Waelz process. The global warming potentials of the roasting–organic acid leaching process (with co …
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Zn and Ge were selectively extracted from zinc oxide dust (ZOD) by the ultrasonic-H 2 O 2 (UH) combined oxidation-leaching process. In the leaching process, the effects of the dosage of H 2 O 2 (6–29.5 mL), ultrasonic power, initial acidity (100–200 g L −1), liquid/solid mass ratio (4–8 : 1), leaching temperature (50–90 °C), and leaching time (30–240 min) …
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Learn 20 easy ways to create a dust-free home, from using doormats and humidifiers to vacuuming properly and changing air filters. Find out how to reduce dust …
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Leaching is the key unit operation in metallurgical processes. It is the dissolution of metals from their natural ores into a liquid medium. Leaching processes are classified based on the method used for the leaching of metals, i.e. hydrometallurgy (chemicals) or bio-hydrometallurgy (microbial mediated leaching).
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Alternative Methods for Cement Dust Removal. While vinegar and commercial cement removers are effective, alternative methods and tools can provide added flexibility and options. Consider trying: Steam Cleaning: Invest in a steam cleaner, which can effectively soften and loosen stubborn cement dust. Steam cleaning is …
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A similar standpoint was also reported and proved in the work of Ding et al. and Xin et al. Ding et al. discovered that the Zn contained in a corundum flue dust was almost completely leached (leaching recovery of 99.57%) using ultrasound-assisted sulfuric acid leaching, whereas the leaching ratio achieved by conventional leaching was only …
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In this study, we report the recovery of metals from copper smelting dust by oxidation leaching and fractional precipitation technology. Under the optimum conditions, the leaching efficiencies achieved for Cu, As, Fe, Cd, and Zn are 93.4%, 94.2%, 39.7%, 98.1%, and 90.7%, respectively. Fractional precipitation technology is then …
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