Influencing Factor of Lithium Extraction in Lithium Ion Sieve Precursor from Ocean Polymetallic Noddle

The effects of lithium-to-manganese ratio,time,temperature,acid concentration,particle size,liquid-to-solid ratio,and agitation rate on the extractive lithium and resolutive manganese are investigated.The optimal technological conditions derived from experiment are: time 210min,temperature 60℃,acid concentration 1.0mol/L,particle size-38μm,liquid-to-solid ratio 50:1,lithium-to-manganese ratio 0.7 and agitation rate 350r/min.The extractive rate of lithium is up to 82.9% and the rate of resolutive manganese is equal to 5.72% under optimal condition.By XRD characterizing,after lithium extraction,the ion sieve still shows spinel structure,but the cell becomes small.