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Simultaneous Extraction of Zinc and Manganese Dioxide from Zinc Sulphide Concentrate and Manganese Ore

IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur


Field	Value

Title	Simultaneous Extraction of Zinc and Manganese Dioxide from Zinc Sulphide Concentrate and Manganese Ore

Creator	Pande, A M Prasad, Sanjay Premchand,

Subject	Metallurgy

Description	Direct leaching studies of mixture of zinc sulphide concentrate (concentrate) of Himalayan origin and manganese ore (ore) in stoichiometric proportion according to the reaction : ZnS + Mn02 + 2H2SO4 = ZnSO4 + MnSO4 + S° + 2H20 in dilute sulphuric acid (present in spent liquor from electro-winning cells) were carried out to test its amenability to a novel process developed at National Metallurgical Laboratory (NML). The liberated sulphur in the sludge was extracted in pure form. The effects of controlling parameters viz. acid-concentration, temper-ature and duration of leaching were investigated to opti-mize the leaching conditions. Extraction efficiencies of zinc and sulphur under best condition were —82% each, while that of manganese was —95%. The inextricable portion of zinc sulphide was investigated with the help of XRD analysis of the concentrate and the final residue. The leach solution purified by conventional hydro-metallur-gical technique was fed to an electrolytic cell for simultaneous electro-winning of zinc and electrolytic manganese dioxide (EMD). The EMD was y-variety as shown by TG/DTA and XRD analyses.

Date	1997-07

Type	Conference or Workshop Item PeerReviewed

Format	application/pdf

Identifier	http://eprints.nmlindia.org/6565/1/389-393.PDF Pande, A M and Prasad, Sanjay and Premchand, (1997) Simultaneous Extraction of Zinc and Manganese Dioxide from Zinc Sulphide Concentrate and Manganese Ore. In: Recent advances in metallurgical processes Vol - 1, 16th-19th July 1997, IIS, Bangalore.

Relation	http://eprint.nmlindia.org/6565 http://eprints.nmlindia.org/6565/