Investigation into the Influence of Sodium Lignosulfonate, Anionic Surfactants, and Their Mixtures on the Copper Cementation Rate by Zinc

Kolmachikhina, E. B.; Sviridov, A. V.; Naumov, K. D.

doi:10.3103/s1067821220050077

Cited by 3 publications

(1 citation statement)

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“…The sulfating roasting at 600 °C during 180 min with addition of 48% Fe 2 (SO 4 ) 3 ∙9H 2 O to 100% ZPR and subsequent water leaching led to the recovery of 99.0% Zn, 80.3% Cu, 55.0% Cd, 39.0% Tl into the solution, as well as retaining of 99.6% Fe, 98.1% Pb, 99.6% In, 99.8% Ga, 96.6% Ag in the solid residue. Copper and cadmium can be conventionally extracted and separated from the leached solution by zinc dust cementation [ 6 , 100 ], then the zinc-containing solution after its appropriate purification can be used for zinc electrowinning. Lead, which is in the solid residue as PbSO 4 , can be recovered using leaching by NaOH solution [ 101 , 102 ].…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2021

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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.

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Section: Discussionmentioning

confidence: 99%