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author:

Lin, Hong-fu (Lin, Hong-fu.) [1] | Weng, Wei (Weng, Wei.) [2] (Scholars:翁威) | Zhong, Shui-ping (Zhong, Shui-ping.) [3] (Scholars:衷水平) | Qiu, Guan-zhou (Qiu, Guan-zhou.) [4]

Indexed by:

EI SCIE CSCD

Abstract:

High-efficiency recovery of Zn and Pb from silicon-rich zinc leaching residues is realized in a rotary kiln. Characterizations by means of XRD, SEM, EDS and ICP reveal that the leaching residue contains 12.4 wt.% SiO2, 16.1 wt.% Zn, and 7.4 wt.% Pb. Thermodynamic analysis shows that metallic vapor of Zn and Pb can be easily generated from the zinc leaching residue at 1150-1250 degrees C inside the rotary kiln. Viscosities and melting points of 13 slag compositions were analyzed and three slag compositions (47wt.%SiO2-23wt.%CaO-30wt.%FeO, 40wt.%SiO228wt.%CaO-32wt.%FeO, and 40wt.%SiO2-30wt.%CaO-30wt.%FeO) possessed the desirable physical properties, with the melting point and viscosity in the range of 1150-1280 degrees C and 0.2-0.5 Pa center dot s, respectively. The industrial tests show that adopting the optimized slag composition can contribute to very high recovery rates of Zn and Pb (97.3% for Zn and 94.5% for Pb), corresponding to slags with very low average contents of Zn and Pb (0.51 wt.% Zn and 0.45 wt.% Pb). The National-Standard leaching tests of the water-quenched slags result in 1.82 mg/L Zn, similar to 0.01 mg/L Cu, 0.0004 mg/L As,similar to 0.01 mg/L Cd, 0.08 mg/L Pb, and similar to 0.02 mg/L Hg in the leachate, verifying the detoxification of the zinc leaching residue at the same time.

Keyword:

detoxification metals recovery rotary kiln slag composition optimization zinc leaching residues

Community:

  • [ 1 ] [Lin, Hong-fu]Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China
  • [ 2 ] [Qiu, Guan-zhou]Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China
  • [ 3 ] [Lin, Hong-fu]Zijin Min Grp Co Ltd, State Key Lab Comprehens Utilizat Low Grade Refra, Shanghang 364200, Peoples R China
  • [ 4 ] [Weng, Wei]Zijin Min Grp Co Ltd, State Key Lab Comprehens Utilizat Low Grade Refra, Shanghang 364200, Peoples R China
  • [ 5 ] [Zhong, Shui-ping]Zijin Min Grp Co Ltd, State Key Lab Comprehens Utilizat Low Grade Refra, Shanghang 364200, Peoples R China
  • [ 6 ] [Weng, Wei]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 7 ] [Zhong, Shui-ping]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China

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Source :

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

ISSN: 1003-6326

CN: 43-1239/TG

Year: 2022

Issue: 9

Volume: 32

Page: 3110-3122

4 . 5

JCR@2022

4 . 7 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:91

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 14

SCOPUS Cited Count: 12

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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