Selective removal of arsenic from high arsenic dust in the …
DOI: 10.1016/J.HYDROMET.2021.105607 Corpus ID: 234864351; Selective removal of arsenic from high arsenic dust in the NaOH-S system and leaching behavior of lead, antimony, zinc and tin
A novel process for the treatment of steelmaking converter dust …
A large amount of converter dust (CD) is generated annually, posing serious environmental problems due to its zinc content. Moreover, zinc mainly exists in the form of inert ZnFe 2 O 4 in CD, which negatively affects the leaching efficiency of zinc. On the other hand, the photocatalytic activity of hydrothermal carbonation carbon (HTCC) is …
Alternative Method for Treating Electric Arc Furnace Dust: …
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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Experimental Study on Arsenic Removal from Leaching …
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 …
Extraction of zinc from blast furnace dust in ammonia leaching …
In this research, the extraction of zinc from the blast furnace dust in the ammonia leaching system containing different leaching agents (NH 3, (NH 4 ) 3 AC, (NH 4 ) 2 CO 3, (NH 4 ) 2 SO 4, NH 4 Cl) was investigated. Meanwhile, the effects of different total ammonia concentrations, ammonia/ammonium ratios, solid-liquid ratios, stirring …
Selective removal of As from arsenic-bearing dust rich in …
The optimum conditions for the removal of arsenic from arsenic-bearing dust are 10% sulfur addition with L/S ratio of 8 in 3 mol/L NaOH solution at 90 °C for 1.5 h. Under these conditions, the arsenic leaching efficiency of 99.84% is achieved with little dissolution of antimony and lead, resided in the leaching residue. 4 Conclusions (1) A ...
Selective removal of arsenic from high arsenic dust in the …
In this work, a feasible microwave-enhanced leaching process was developed for arsenic selective removal from copper smelter dusts, and arsenic leaching efficiency could reach ∼98 % after ...
Zinc recovery from metallurgical slag and dust by …
1. Introduction. Currently, the main source of zinc metal is the traditional zinc resource—zinc sulfide ores. However, as the zinc consumption increases and the zinc sulfide ore grades deteriorate, the …
Recovery of bismuth and other metals from blast furnace …
A leaching efficiency of 94.9% Bi was achieved at the most suitable conditions (stirring speed: 300 rpm, liquid-solid ratio: 5 mL/g, temperature: 70°C, time: …
Dust Extraction Buyers Guide
A typical hobby level high volume dust extractor will be supplied with a cloth filter, with a rating of 5 microns. That means it will filter out 99% of dust particles at 5 micron size or …
Removal of zinc from dusts and sludges from basic oxygen furnaces …
A large amount of converter dust (CD) is generated annually, posing serious environmental problems due to its zinc content. Moreover, zinc mainly exists in the form of inert ZnFe 2 O 4 in CD, which negatively affects the leaching efficiency of zinc. On the other hand, the photocatalytic activity of hydrothermal carbonation carbon (HTCC) is …
Pyrometallurgical removal of zinc from basic oxygen steelmaking dust
Pyrometallurgical removal of zinc from basic oxygen steelmaking dust – A review of best available technology. ... Characterization of basic oxygen furnace dust and zinc removal by acid leaching. Miner. Eng., 17 (2) (2004), pp. 285-291, 10.1016/j.mineng.2003.10.030. View PDF View article View in Scopus Google Scholar.
Efficient bromine removal and metal recovery from waste …
A novel two-stage leaching method for Br removal and metal recovery from waste printed circuit boards (WPCBs) smelting flue dust was developed. The effects of leaching conditions on Cu, Zn, Pb and Sn extraction behavior and Br removal were studied systematically. ... The chemical composition of WPCBs smelting flue dust and leaching …
The Design And Construction Of A Dust Extractor
for removing dust particles from a flowing air-stream prior to discharge. A typical dust extractor consists of a suction blower, suction hose, filter, filter-cleaning system, and …
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Hydrometallurgical Treatment of Copper Smelting Dust …
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 …
Removal of iron from waste printed circuit board dust
Iron content in printed circuit board (PCB) dust consumes complexing agents, compromises recovery and contaminates leach solution during precious metals recovery from this waste stream. This study evaluated the prospects of iron removal from PCB dust via wet magnetic separation (WMS) versus sulphuric acid leaching. Chemical …
Leaching behavior of metals from high-arsenic dust by …
Under these conditions, the average leaching efficiencies of arsenic, antimony, lead, tin and zinc are 92.75%, 11.68%, 0.31%, 29.75% and 36.85%, respectively. The NaOH–Na 2 S alkaline leaching process provides a simple and highly efficient way to remove arsenic from high-arsenic dust, leaving residue as a suitable lead resource. …
Selective removal of arsenic from high arsenic dust in the …
A selective removal of arsenic from lead‑antimony-zinc-containing high arsenic dust in NaOH-S system was proposed. • NaOH-S system could solve the problem of high antimony leaching efficiency in the process of arsenic removal in NaOH-Na 2 S system.. 98.17% of Sb, 99.85% of Pb and 99.75% of Zn remained in the leaching …
Arsenic removal from acid extraction solutions of copper smelting flue dust
Multi-metal extraction of flue dust from copper smelting is being pursued to meet the increasingly appealing environmental requirements of our modern life. In this paper, the thermodynamic analysis of acid leaching solution was carried out. Ferric arsenate deposits were found in the range of pH = 0–11.63, in the form of FeAsO 4 and …
How To Easily Remove Sawdust From Your Grass – …
I had some tall old trees on my lawn that needed to go because they gave me anxiety every time strong winds hit. Without thinking too …
One-step extraction of zinc and separation of iron from …
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; …
Efficient bromine removal and metal recovery from waste …
Download Citation | Efficient bromine removal and metal recovery from waste printed circuit boards smelting flue dust by a two-stage leaching process | A novel two-stage leaching method for Br ...
Dust Collection Basics: Semi-Industrial Dust Extractors
Toolmate FM300 Single Bag Dust Extractor. The ideal dust collector for home or light industrial use. The 125 mm inlet splits in 2 x 100mm outlets-ideal to use on …
Pyrometallurgical removal of zinc from basic oxygen steelmaking dust
Approximately 20 kg of dust and sludges are produced per ton of liquid steel produced via the blast furnaces (BF)/basic oxygen furnace (BOF) production route. Many of these dusts are recycled through the sinter plant or blast furnace route without issue, but high zinc content dusts are routinely landfilled. Hydrometallurgical techniques, such as …
Hydrometallurgical Recovery of Gold from Mining Wastes
2.1 Cyanide leaching. Cyanide is a cheap but highly toxic reagent that is very effective in leaching gold from low-grade minerals and mining wastes. Therefore, cyanidation is the most widely used method for the extraction of gold from mining wastes.
Selective Removal of Zinc from BOF Sludge by Leaching …
Although sulfuric acid can leach high amounts of zinc, the high iron co-dissolution represents a main disadvantage. A process for removing zinc from BOF sludge by leaching with spent pickling liquor (HCl) was reported, where iron co-dissolution can be reduced by keeping the pH at 4–5 [].Organic acids have also been investigated for the …