The SO_2 leaching of ocean manganese nodules is studied,investigating the effect of SO_2 consumption, retention time, nodule size and TA,TB additives on the metal extraction.

La doped ferrite was prepared by solid state reaction with marine manganese nodules from East Pacific seafloor as raw material, NaOH as flux, La(NO3)3 as doping agent.

Leaching and further conversion of manganese from seabed manganese nodules;

Technologies for processing deep-sea manganese nodules and their developmental trends;

The liquid-phase oxidation kinetics of deep-sea manganese nodules in high concentration potassium hydroxide medium is investigated by the effects of factors on the conversion rate of manganese in the deep-sea manganese nodules such as reaction time,reaction temperature as well as oxygen partial pressure.

The precursor of lithium ion sieve is composed by solid-phase synthesis reaction using deep-sea manganese nodules and lithium salt.

In this paper, some comments on the newly discovered “nanometer scale ultra microfossils ” (Spirisosphaerospora pacifica and Miniactinomyces chinensis) in pelagic manganese nodules from the East Pacific Ocean are made.

Consequently, the pelagic manganese nodule is a manganese oncolite.

The preparation of manganese sulfate from manganese dioxide/oceanic manganese nodule ore by catalytic reduction with refined zincblende/plumbag ore;

Thin technology is related to the preparation of manganous sulfate from low grade manganese dioxide/oceanic manganese nodule and manganese glance concentrate by one-step recycling with direct leaching method.