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Titolo:
Modified zinc sulphate solution purification technique to obtain low levels of cobalt for the zinc electrowinning process
Autore:
Raghavan, R; Mohanan, PK; Verma, SK;
Indirizzi:
Hindustan,Zinc Ltd, Zinc Lead Smelter, Visakhapatnam 530015, Andhra Pradesh Hindustan Zinc Ltd Visakhapatnam Andhra Pradesh India 530015 dhra Pradesh
Titolo Testata:
HYDROMETALLURGY
fascicolo: 2, volume: 51, anno: 1999,
pagine: 187 - 206
SICI:
0304-386X(199902)51:2<187:MZSSPT>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANTIMONY;
Keywords:
zinc sulphate; cobalt; zinc electrowinning process; down-stream electrowinning operation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Raghavan, R Hindustan,Zinc Ltd, Zinc Lead Smelter, Visakhapatnam 530015, Andhra Pradesh Hindustan Zinc Ltd Visakhapatnam Andhra Pradesh India 530015
Citazione:
R. Raghavan et al., "Modified zinc sulphate solution purification technique to obtain low levels of cobalt for the zinc electrowinning process", HYDROMETALL, 51(2), 1999, pp. 187-206

Abstract

Zinc sulphate solution purification is very critical in the conventional 'roast-leach-electrowin' process when adopting the hydrometallurgical route for the production of zinc metal. Various purification methods are used in practice to achieve high quality neutral zinc sulphate electrolyte with minimum levels of impurities. A modified single-stage zinc sulphate solution purification process is described in this paper with an aim to bring down cobalt to low levels. It involves a single-stage purification with two-stage operation using potassium antimony tartrate (PAT), copper sulphate and zincdust for the removal of impurities. The results obtained at both laboratory scale and plant scale and the optimum parameters to achieve the high quality solution are described. Chemical kinetics, copper requirement, zinc dust dosage and temperature for the removal of impurities and the composition of the final purified zinc sulphate solution obtained are discussed. The paper also compares the existing operating performance of the plant and the results obtained through this modified solution purification technique. Thissuggested new process is very simple and provides an improved electrolyte for the down-stream electrowinning operation. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 15:01:06