There are three crystal forms of spodumene, the natural one is called α-type spodumene; After heating to 1150℃~1200℃, will be transformed into β-type spodumene; At higher temperatures, beta spodumene transforms into Y spodumene. α-type spodumene is monoclinic crystal system, compact structure, high chemical inertness, except hydrofluoric acid almost does not react with a variety of acids and bases, so it is not suitable to directly extract lithium. PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC can remove iron from spodumene.
β-type spodumene is tetragonal, because the physical and chemical properties of the crystalline transformation minerals also have obvious changes, can react with acid and base, suitable for lithium extraction. Therefore, the crystal conversion roasting process of spodumene is the basis of the whole process of LITHIUM extraction by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC. The quality of crystal conversion roasting directly affects the recovery rate of lithium.
Generally, the spodumene concentrate containing 5.5% ~7.5% Li2O obtained from mineral processing is roasted in a rotary kiln at 1050-1100 ℃ at high temperature, so that the ore density decreases from 3.15g/cm3 to 2.4g/cm3 to become β-spodumene. The disadvantages of sulfuric acid process for lithium carbonate production are long process and high energy consumption. LITHIUM carbonate was prepared by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC process, which is superior to sulfuric acid process.
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