Sanyuan's Prototype Cathode Material LineThe simplified process mainly includes salt, alkali, and ammonia mixing, crystallization reaction, constant-temperature aging, and washing and drying steps.
The liquid nickel sulfate, cobalt sulfate from the previous process, and newly purchased crystalline manganese sulfate are first accurately weighed using an automatic scale. They are then mixed with pure water in a salt-making kettle to form a solution of a specific ratio of sulfates (the salt-making kettle must be equipped with heating wires for heating purposes).60℃Unfortunately, the provided content does not contain any Chinese text to translate. Please provide the Chinese content for translation.32%Sodium hydroxide solutions are pumped through precision filters and then into the respective storage tanks for use. Sulfate solutions and alkaline water solutions, along with ammonia water purchased externally or recycled from water treatment, are stored in two separate tanks for later use. After passing through iron removal pipes, the three solutions are separately pumped into their respective balance tanks. The salt and alkali balance tanks require heating elements for temperature maintenance.40℃The aforementioned three materials are pumped into the titanium reactor via a metering pump, with adjustments made to the reactor's flow rate and agitation speed.pHAutomatic Control &PLCTemperature control and the introduction of nitrogen gas enable the uniform complex precipitation of the nickel cobalt manganese hydroxide matrix. Subsequently, it enters the aging kettle for保温aging (using electric heating wire,).60℃Chen Hua4-8(After a few hours), after aging is complete, the material is pumped into the washer via a rotor pump. During the washing process, hot water is used to rinse sodium ions, alkali water is used to remove sulfate roots, and compressed air is used to dry and achieve solid-liquid separation. The material is then transferred to a pulping kettle, where it is pulped with hot pure water. After pulping is completed, the mixture is pumped into a centrifuge to control the moisture content of the nickel cobalt manganese hydroxide matrix.10%Next, the material is transferred into the drum dryer. After drying, it is conveyed to the blender via a vacuum feeder. It then undergoes screening and iron removal, eliminating不合格 materials and magnetic impurities, improving dispersibility, and producing a qualified precursor of ternary cathode materials (nickel cobalt manganese hydroxide). The mother liquor and washing liquid are collected in storage tanks and pumped into an ammonia evaporation tower for treatment. The ammonia water recovered during the ammonia evaporation process is returned to the ammonia water storage tank for reuse, while the ammonia-free wastewater is directed to the wastewater treatment station. Some distilled water can also be reused by being transferred to the pure water storage tank.
