Investigation on the segregation roasting condition of manganese nodule

Akskadi Djohari*, Shuji Owada, Taneomi Harada, Sakichi Goto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In order to find an economical system for recovering Cu, Ni, and Co from manganese nodules segregation, several conditions in calcination and segregation roasting were examined. Calcination is found necessary before segregation roasting because high water content of the nodule may cause the evolution of excess hydrogen which reduces metal oxides without passing through a series of segregation reactions. The best calcination temperature and time are 950°C and 30 min, respectively. Many factors affect the segregation results. Considering the reducibility and recovery of Ni, Cu, and Co, the following conditions would be suitable form of chloride: CaCl2·2H2O, CaCl2·2H2O addition: 26%, segregation roasting temperature: 900°C, segregation roasting time: 2 hr, coke addition: 14%, nodule size: 53-75μm, and coke size: 300-425μm. Under these conditions, 88%, 70%, and 56% recoveries of Cu, Ni, and Co were obtained.

Original languageEnglish
Pages (from-to)615-620
Number of pages6
JournalNihon Kogyokaishi
Issue number1207
Publication statusPublished - 1988

ASJC Scopus subject areas

  • Engineering(all)


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