Processing of zinnwaldite waste to obtain Li2CO3

Extraction of lithium from lepidolite via iron sulphide roasting and water leaching

“…c o m / l o c a t e / h y d r o m e t (Jandová et al, 2010) and china clay in Cornwall, the United Kingdom (Siame and Pascoe, 2011) were tested to extract lithium. Limestone, gypsum and quenched lime were used to liberate lithium from zinnwaldite concentrates via roasting, and Li was then leached using water (Jandová et al, 2009(Jandová et al, , 2010Vu et al, 2013). The concentrates (1.21-1.4 wt.% Li) were first recovered from zinnwaldite wastes (0.21 wt.% Li) using dry magnetic and grain-size separations.…”

A novel process for extracting lithium from lepidolite

“…The insoluble residue (Li 2 CO 3 ) was then filtered. For carbonation reaction, carbon dioxide was sparged into the solution (250 ml) at a flow rate of 0.5 L/min for 120 min to ensure that almost all the lithium carbonate in the solution was converted to lithium bicarbonate and the impurities (Si, Al) were precipitated in residue (Jandová et al, 2010). The filtrate was heated at 90°C for 1 h to eliminate CO 2 and then filtered to obtain lithium carbonate crystals.…”

“…The solid lithium minerals could be considered as sub-economic resources if the price of lithium continues to rise. Various methods have been developed to produce lithium from lithium ores (Brandt and Haus, 2010;Büyükburç et al, 2006;Chen et al, 2011;Jandová et al, 2010;Robinson, 1961;Victor, 1953;Walter, 1935). The most important processes for the extraction of lithium from lepidolite are the sulfuric acid and the lime methods (Distin and Phillips, 1982).…”

Extração de lítio de amostras de β-espodumênio

“…O processamento de um mineral KLiFeAl(AlSi 3 ) O 10 (F,OH) 2 (zinnwaldite) para a retirada de lítio foi apresentado [6]. O processo consiste no aquecimento do material com CaCO 3 , seguido por lixiviação com H 2 O e como um dos métodos de precipitação do carbonato de lítio foi utilizando borbulhamento de CO 2 .…”