کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
673166 | 1459479 | 2015 | 5 صفحه PDF | دانلود رایگان |
• β-Spodumene was roasted with calcium chloride to extract lithium.
• The optimal conditions of the chlorination process are 900 °C and 120 min.
• The products of the reaction are lithium chloride, anorthite, and silica.
Chlorination roasting was used to extract lithium as lithium chloride from β-spodumene. The roasting was carried out in a fixed bed reactor using calcium chloride as chlorinating agent. The mineral was mixed with CaCl2 on a molar ratio of 1:2. Reaction temperature and time were investigated. The reactants and roasted materials were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD) and atomic absorption spectrophotometry (AAS). The mineral starts to react with CaCl2 at around 700 °C. The optimal conditions of lithium extraction were found to be 900 °C and 120 min of chlorination roasting, under which it is attained a conversion degree of 90.2%. The characterization results indicate that the major phases present in the chlorinating roasting residue are CaAl2Si2O8, SiO2, and CaSiO3.
Journal: Thermochimica Acta - Volume 605, 10 April 2015, Pages 63–67