Selective leaching of zinc from blast furnace dust with mono-ligand and mixed-ligand complex leaching systems

Zhang, Duchao; Zhang, Xinwang; Yang, Tianzu; Rao, Shuai; Hu, Wei; Liu, Weifeng; Chen, Lin

doi:10.1016/j.hydromet.2017.02.003

Cited by 49 publications

(23 citation statements)

References 17 publications

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“…[13]. Cu, Ni, Cr, Cd, Pb, and Zn are among the most common heavy metal contaminants of industrial pollution [14,15]. The impacts of these chemicals in terms of impurities can be arranged according to the environmental risk indicator for heavy metals, where Cd > Zn > Cu > As > Pb [16].…”

Section: Impurities In the Ironmaking Processmentioning

confidence: 99%

“…In addition, the loading of Pb increases the coke rate [23]. Lastly, Pb vapor discharges outside the furnace, thereby causing potential safety hazards, environmental pollution, and Pb poisoning [15].…”

Section: Effect Of Pb On Ironmakingmentioning

confidence: 99%

“…Then, PbO and ZnO are converted into Pb solution and Zn steam through a carbonaceous reductant, respectively. Under high-temperature reduction, ZnO and ZnFe 2 O 4 are reduced to Zn steam [15]. Pb is directly produced by the interaction reaction among PbS, PbO, and PbSO 4 .…”

Section: Present Situation Of the Pb-zn Metallurgical Reduction Processmentioning

confidence: 99%

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Effect of Lead and Zinc Impurities in Ironmaking and the Corresponding Removal Methods: A Review

Mustafa

Luo

Zheng

et al. 2021

Metals

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This paper reviews the effects of Pb and Zn impurities and their removal in the ironmaking process. The phase changes during ironmaking were investigated, along with the removal techniques of such impurities and their environmental impact. Results show that distribution of Pb–Zn–Fe in Fe ore is complicated, the particles are fine, and the removal of mineral phase at high temperature is difficult. Therefore, the production and occurrence of Pb and Zn impurities in the ironmaking process were analyzed; such impurities reduced the overall productivity of the process. In addition, the important treatments for the removal of these impurities were investigated. Most of these processes eliminated the Pb and Zn impurities from the dust or sludge, but the main impact of the reduced productivity of the ironmaking process in the furnaces was still observed.

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Section: Impurities In the Ironmaking Processmentioning

confidence: 99%

Section: Effect Of Pb On Ironmakingmentioning

confidence: 99%

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Effect of Lead and Zinc Impurities in Ironmaking and the Corresponding Removal Methods: A Review

Mustafa

Luo

Zheng

et al. 2021

Metals

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“…Novel leaching agents has been used for the treatment of EAF, BF and BOF dust as is shown in Table 2. Organic acid as butyric, citric or iminodiacetic have been studied to extract zinc from basic oxygen sludges or dust and electric arc furnace dust by using the coordination reaction between the organic ligand and zinc ions [20][21][22][23]. According to results shown in the table, in some case high Zn removal are obtained (up to 100%) with low Fe loss.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Leaching of Zinc and Alkalis from Iron Blast Furnace Sludge

Aguilar

Dávila-Pulido

Pedroza

et al. 2019

Metals

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The sludge from a wet-off gas cleaning system of the iron blast furnace (BF) contains significant amounts of iron; however, they cannot be recycled due to their high content of zinc and alkalis. These compounds are detrimental to the optimal performance of iron and steelmaking furnaces. In this work, a comparative laboratory study to reduce zinc and alkali contained in the blast furnace sludge (BFS) is presented. The effect of leaching parameters such as oxidant (i.e., ferric ion, oxygen or ozone), aqueous solution media (i.e., 0.2 M NH4Cl, 0.2 M HCl and 0.1 M H2SO4) and temperature (i.e., 27 and 80 °C) on Zn and alkalis (Na2O and K2O) removal were studied by applying an experimental design. The results obtained show that Zn and K2O removal of 85% and 75% were achieved under the following conditions: Ozone as an oxidant agent and 0.1 M H2SO4 as an aqueous medium, temperature had no significant effect. The results are supported by thermodynamic diagrams and the possible chemical reactions are mentioned. Although the results also indicate that leaching under the above conditions dissolves up to 9% of iron, this loss is much less than leaching without the oxidizing conditions generated by the ozone. The BFS obtained from this treatment could be recirculated to the iron or steelmaking processes to recover iron values.

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“…Crystallization, ion exchange, solvent extraction, and oxidation followed by precipitation are all effective for controlling Fe leaching or removing leached Fe via a wet-acid process [13,14]. Although these previous methods increased the removal efficiency of Fe, they still required high temperatures and pressures, consumed significant energy, and required an additional step to separate Zn and Fe.…”

Section: Introductionmentioning

confidence: 99%

Toward high recovery and selective leaching of zinc from electric arc furnace dust with different physicochemical properties

Lee

Park

Hwang

et al. 2019

Environmental Engineering Research

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This work describes highly efficient recovery and selective leaching of Zn from electric arc furnace dust (EAFD) with different physicochemical properties, induced by acid leaching at ambient conditions. The chemical compositions, mineralogical phases, and particle sizes of the EAFDs were analyzed and compared. The effects of leaching time, liquid/solid ratio, acid type, and acid concentration on the selective leaching of Zn were also studied. The EAFD with high Fe/Zn ratio (>1, EAFD 3) was richer in ZnFe 2 O 4 and exhibited larger particle size than samples with low Fe/Zn ratio (<1, EAFD 1,2). ANOVA analysis revealed that the Fe/Zn ratios of the EAFDs also have a significant effect on Zn extraction (p <0.005). Selective leaching of Zn with minimum Fe dissolution was obtained at pH >4.5, regardless of other parameters or sample properties. The maximum Zn extraction rate obtained by the pH control was over 97% for EAFD 1 and EAFD 2 , 76% for EAFD 3 , and 80% for EAFD 4. The present results confirm that the Fe/Zn ratio can be used to identify EAFDs that permits facile and high-yield Zn recovery, and pH can be used as a process control factor for selective leaching of Zn regardless of any differences in the properties of the EAFD sample.

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Selective leaching of zinc from blast furnace dust with mono-ligand and mixed-ligand complex leaching systems

Cited by 49 publications

References 17 publications

Effect of Lead and Zinc Impurities in Ironmaking and the Corresponding Removal Methods: A Review

Effect of Lead and Zinc Impurities in Ironmaking and the Corresponding Removal Methods: A Review

Oxidative Leaching of Zinc and Alkalis from Iron Blast Furnace Sludge

Toward high recovery and selective leaching of zinc from electric arc furnace dust with different physicochemical properties

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