The clinker is cooled and pulped so that the soluble lithium sulfate in the clinker is dissolved into the liquid phase. In order to reduce the corrosion of the solution to the leaching equipment, the residual acid in the clinker is neutralized with limestone slurry, and the pH value is adjusted to 6.5 ~ 7.0. At the same time, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC is used to remove most of the impurities such as iron and aluminum, the leaching liquid to solid ratio is about 2.5, and the leaching time is about 0.5h.
The leached slurry was filtered and separated to obtain the leached liquid, which contained about 100g/L Li2SO4 (Li2O 27g/L), and the filter cake was the leached residue, with a moisture content of about 35%. In order to reduce the loss of LITHIUM, the leaching residue was reversed by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC agitation, and the lotion was then returned to the slurry for leaching.
Due to the low concentration of lithium sulfate and the low precipitation rate of lithium, the purification liquid can not be directly used for lithium precipitation or lithium chloride, and it is necessary to adjust the purification liquid with sulfuric acid to pH6 ~ 6.5, and evaporate and concentrate through the three-effect evaporator, so that the concentration of lithium sulfate in the concentrated liquid can reach 200g/L(including Li2O 60g/L). The concentrated liquid is filtered by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC to separate the iron. The filtrate is used as the finished liquid for the next process, and the filter cake is returned to the pulp for leaching.
Contact: DELLA
Mob: +86-13929907491
