... Recovery of Cu, Ni, Co and Mn from Sea Nodules by Direct Reduction Smelting Sanjay Agarwal, K.K. Sahu, R.K. Jana, and S.P. Mehrotra Metal Extraction & Forming Division, National Metallurgical Laboratory Jamshedpur, Jharkhand, India ABSTRACT Polymetallic nodule contains various metals like copper...

.... The processes for four metal recovery are based on acid leaching in the presence/absence of reductants like S02 and charcoal. The processes for three metal recovery are primarily based on ammoniacal leaching routes in the presence of reductants. Under ammoniacal conditions the extent of manganese extraction...

... ABSTRACT: For the extraction of metal values from poly-metallic nodule several alternative techniques have been used. Out of these, the most promising ones are based on selective reduction of metal oxides / hydroxides in aqueous slurry. The present work on metallurgical process development...

... ARSTRACT: National Metallurgical Laboratory has developed a reduction roast-ammonia Leach-solvent extraction-electro winning process operational at pilot sale for the recovery of Cu, Ni and Co from sea nodules of Central Indian Ocean. This paper describes the effect of the various process...

... Abstracts: The leaching characteristics of manganese nodules were investigated in ammonium chloride solution by using sodium sulfite as a reductant. Experiments were conducted in leaching of manganese, cobalt nickel, copper and iron using sodium sulfite in the ammonium chloride solution...