Selective Extraction of Zinc from Zinc Ferrite

Kashyap, Vivek; Taylor, Patrick R.

doi:10.1007/s42461-020-00306-6

Cited by 7 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dutra [23] and Orhan et al [24] obtained 74% and 85% Zn recovery, respectively, by conventional alkaline leaching experiments and suggested that the insolubility of ZnFe 2 O 4 in the dust was the main reason for the low leaching rate. Due to the low aqueous solubility of zinc ferrite, most of the hydrometallurgical processes are not economically feasible for the extraction of zinc or iron as zinc residues typically contain only 15-20% of zinc and iron [25].…”

Section: Introductionmentioning

confidence: 99%

Separation of Zinc from Zinc Ferrite by Magnetization Roasting and Ammonia Leaching

et al. 2023

View full text Add to dashboard Cite

Zinc ferrite can be found in zinc-bearing dust in ironmaking and steelmaking. It is difficult to be recovered due to its stable properties. The magnetization roasting and ammonia leaching method were used to separate iron and zinc from zinc ferrite in this study. Thermodynamic analysis showed that the key to the selective reduction of zinc ferrite to zinc oxide and ferric oxide is to control the appropriate temperature and atmosphere. The influences of the selective reduction roasting process of zinc ferrite on the conversion rate, phase change, and microevolution behavior were investigated. The microstructure analysis showed that the distribution area of iron was mainly gray, and the distribution area of zinc was mainly white grid lines. The zinc content in the white area was higher than that in the gray area. With the increase in temperature and PCO, the white area expanded and the migration of zinc and iron was accelerated, but the iron in the white area still existed. The ammonia leaching of the magnetization-roasted product showed that a zinc leaching rate of 78.12% was achieved under the following conditions: the roasting atmosphere of PCO/P(CO+CO2) = 25%, the roasting temperature of 750 °C, roasting duration for 45 min, n(NH3-H2O):n(NH4Cl) = 1:1, the solid–liquid ratio of 40 g/L, leachate concentration of 6 mol/L, leaching duration of 90 min, the leaching temperature of 50 °C, and the stirring rate of 200 rpm.

show abstract

Section: Introductionmentioning

confidence: 99%

Separation of Zinc from Zinc Ferrite by Magnetization Roasting and Ammonia Leaching

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Some authors have studied other leaching methods for the processing of zinc ferrite residue by sulfuric acid [ 11 , 12 , 13 ], di-2-ethylhexyl phosphoric acid [ 14 ], sodium hydroxide [ 15 , 16 ], chloride solutions [ 17 , 18 , 19 ], and even by ionic liquids [ 20 ] and deep-eutectic solvents [ 21 ]. The methods using pyrometallurgical processing of such materials by reduction roasting [ 22 , 23 , 24 , 25 ], sulfiding roasting [ 26 , 27 ], roasting with the addition of sodium compounds [ 28 , 29 , 30 , 31 ], chloride volatilization process [ 32 ] were also reported. However, these methods are still hardly applicable in the industrial practice.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Study on the Mechanism of Sulfating Roasting of Zinc Plant Residue with Iron Sulfates

et al. 2021

View full text Add to dashboard Cite

Zinc plant residue (ZPR) is a secondary material generated during hydrometallurgical zinc production that contains considerable contents of valuable elements such as Zn, Cu, Fe, Pb, Cd, Ag, In, Ga, Tl. Zinc, copper and accompanying elements in ZPR are in different minerals, mainly in the ferrites. A promising approach for recycling ZPR is the sulfating roasting using iron sulfates followed by water leaching. In this study, the composition of ZPR and the obtained products were thoroughly investigated by various methods including X-ray diffraction analysis (XRD), chemical phase analysis and Mössbauer spectroscopy. The effect of temperature, amount of iron sulfates and roasting time on the conversion of valuable metals into a water-soluble form was thermodynamically and experimentally studied both using pure ferrites and ZPR. Based on the results of time-resolved XRD analysis and synchronous thermal analysis (STA), a mechanism of the sulfation roasting was elucidated. The rate-controlling step of zinc and copper sulfation process during the ZPR roasting was estimated. The sulfating roasting at 600 °C during 180 min with the optimal Fe2(SO4)3∙9H2O addition followed by water leaching enables to recover 99% Zn and 80.3% Cu, while Fe, Pb, Ag, In, Ga retained almost fully in the residue.

show abstract

“…Since zinc and iron tend to be companions in common use and zinc-bearing minerals, co-treatment of massive zinc and iron containing materials at the furnace brings about zinc ferrite, which is a stable phase causing trouble in recycling zinc [2,3]. Many solid wastes such as zincbearing flue dust and zinc leaching residue are reported to contain considerable amounts of zinc ferrite [4]. To realize resource recycle, carbothermal reduction method has been long used, followed by obvious drawbacks including coal consumption, slag stockpile and loss of non-volatile metals [5].…”

mentioning

confidence: 99%

A novel leaching process of zinc ferrite and its application in the treatment of zinc leaching residue

Zhang,

Wang,

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Zinc ferrite is a refractory phase generated in the pyrometallurgical process of zinc and steel production. Much energy is invested in the decomposition of zinc ferrite to recycle zinc since zinc ferrite is difficult to leach. In this work, a novel leaching process targeted at decomposition of zinc ferrite was proposed to save energy and improve metal recovery efficiency. The key of this novel leaching process was the use of copper powder as the reductant. Leaching of zinc ferrite in the presence of copper powder was investigated. The extraction of zinc was 100% when molar ratio of copper to zinc ferrite was 1.5 while the extraction of zinc was only 19.3% without copper. Effects of leaching temperature, acid concentration, the ratio of liquid to solid and reaction time were studied. Under the conditions: 60 °C, ≥ 70 g·L1 H2SO4, the ratio of liquid to solid ≥ 25 mL/g and the molar ratio of copper to zinc ferrite ≥ 1.5 at the open system, the synthetic zinc ferrite was dissolved completely within 60 min. Besides, the zinc ferrite-bearing zinc leaching residue from a roast-leach-electrowin plant was analyzed and leached under the optimal conditions. It was found that most of zinc ferrite in the zinc leaching residue was removed, remaining unreacted lead sulphate in the leached residue. The leaching efficiency of zinc in zinc leaching residue reached 94.2%. The results suggest that copper powder enhanced facile and efficient zinc extraction from zinc ferrite without concentrated acid, high temperature, long reaction time and specific investment. The recyclability of copper and its intrinsic commodity value showed the potential application in industrial zinc and iron containing wastes.

show abstract

Selective Extraction of Zinc from Zinc Ferrite

Cited by 7 publications

References 23 publications

Separation of Zinc from Zinc Ferrite by Magnetization Roasting and Ammonia Leaching

Separation of Zinc from Zinc Ferrite by Magnetization Roasting and Ammonia Leaching

Comprehensive Study on the Mechanism of Sulfating Roasting of Zinc Plant Residue with Iron Sulfates

A novel leaching process of zinc ferrite and its application in the treatment of zinc leaching residue

Contact Info

Product

Resources

About