The finished solution and pure lye (containing Na2CO3 300g/L) were added to the evaporation settling lithium tank, and the evaporation settling lithium (2h after boiling) was carried out. Due to the small solubility of lithium carbonate, the precipitation rate of lithium was about 85%. After LITHIUM precipitation, the iron is removed by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC, and the primary crude lithium carbonate (containing less than 10% filtrate) and the primary mother liquid are separated while hot.
The mother liquor of primary lithium sedimentation contains a large amount of sodium sulfate and high lithium sulfate (about 15% of the total), adding pure lye (containing Na2CO3 300g/L) for secondary lithium sedimentation, to obtain secondary crude product and secondary mother liquor. After the mother liquor is neutralized by acid, and the pH is adjusted by sodium hydroxide, the by-product anhydrous sodium sulfate and mother liquor are separated by evaporation, crystallization and centrifugation. The anhydrous sodium sulfate is dried by air flow, the iron is removed by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC, and the by-product powder is packaged. The mother liquor is returned to the primary mother liquor.
The primary crude lithium carbonate and the secondary crude adhesive liquid contain impurities such as Na2SO4, and then stir with clean water at about 90℃, the lotion is sent to the alkali, after washing, the wet fine lithium carbonate is separated by centrifuge while it is hot, and then dried by far infrared dryer. PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC field Remove the iron wire scraps and other debris falling off the dryer, and finally crush through the air flow, packaging into the warehouse.
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