Electrolytic aluminum waste residue is the waste material generated in the process of electrolytic production of aluminum. The electrolyte is composed of cryolite, alumina and other salt additives, and its waste residue contains a large amount of sodium, aluminum, fluorine, lithium and other elements, which can be extracted after grinding, acid leaching, reduction and other links, and can be used in new energy vehicles, energy storage equipment, mobile communication equipment and other fields.
A variety of methods can be used to extract lithium from electrolytic aluminum waste residue, among which the more mature and economical methods are acid leaching and alkali leaching. The acid leaching method mainly uses acidic media such as sulfuric acid and hydrochloric acid to leach the waste residue, and then uses alkaline substances such as lithium hydroxide to precipitate the lithium out. The alkaline leaching method is to use alkaline media such as sodium hydroxide to leach the waste residue, and then use acidic substances to precipitate the lithium out. Both methods have their advantages and disadvantages, and the choice depends on the composition and characteristics of the residue.
Whether it is acid leaching method or alkali leaching method, it is necessary to pretreat the electrolytic aluminum waste residue by grinding first. First of all, the waste residue is dried to reduce its water content to less than 5%. Then, the powder with a particle size of less than 100 mesh is obtained by grinding through the mill, which provides better conditions for the subsequent links.
In view of the grinding fineness and common capacity requirements of electrolytic aluminum waste slag, the European mill and vertical mill can meet their processing needs.
The European version of the mill is the fourth generation of the traditional Raymond mill and pendulum mill upgraded products, using new technologies such as grinding roller linkage pressurization and bevel gear integral transmission, the output of the table is increased several times compared with the past, and the thin oil lubrication replaces the butter lubrication, and the oil is changed once in about 4-5 months, which can save 3-50,000 oil costs per year.
The vertical mill integrates drying, grinding, powder selection and transportation, and can cope with the treatment of slag, steel slag, water slag, aluminum slag, nickel slag and other refractory waste slag, with an output of 6-80 tons per hour of the vertical mill table, which is suitable for medium and large-scale milling and processing projects.
Relatively speaking, the European version of the mill is more economical and practical, and the output of the vertical mill is larger, which can be selected according to the actual production demand.
Extracting lithium from electrolytic aluminum waste residue can not only realize the ** and reuse of lithium resources, reduce the mining volume and production cost of lithium, but also solve the problem of waste residue discharge and avoid environmental pollution. This approach can provide a sustainable solution for lithium resources**, creating both economic and environmental benefits.