Abstract:Clay-type lithium deposit is a kind of important lithium resources. However, there are relatively few studies on this kind of lithium deposit until present. Ferric chloride solution was used to leach lithium element in carbonate-hosted clay-lithium deposit, and effects of calcination temperature, ferric chloride mass fraction, leaching temperature and reacting time on leaching efficiency of lithium were investigated. The results show that ferric chloride solution has a good selective leaching effect on lithium in sample, and leaching efficiency of lithium is 82.78% under the conditions including calcination temperature of 600 ℃, mass fraction of ferric chloride of 15%, L/S of 5 mL/g, leaching temperature of 80 ℃, reaction time of 240 min, and stirring speed of 240 r/min. XRD and SEM analysis of samples before and after leaching show that leaching of lithium may be the result of exchange of iron ions in ferric chloride solution with lithium ions in clay samples.