Lithium iron phosphate has been favored by many lithium battery material manufacturers due to its long cycle life and high safety. However, there have been problems with dust and unstable quality in previous production processes, making it difficult to meet the needs of large-scale production. The intelligent ingredient grinding solution designed by Langling can help customers produce lithium iron phosphate and assist in manufacturing upgrades.

Highlights of the plan:

(1) Standardization, digitization, and intelligence；

(2) Closed batching to reduce dust;

(3) Visualization of ingredients and stable quality;

(4) Reduce costs, save energy, and achieve lean production.

Scheme description:

  The intelligent batching and grinding scheme provided by Langling includes three parts: dust-free feeding, automatic batching, and premixed grinding. It is composed of multiple stages such as feeding, batching, premixing, rough grinding, precision grinding, iron removal, and storage, making the lithium iron phosphate production line highly automated.

Solution value:

  1. Closed powder feeding to reduce dust pollution; The material flows in an enclosed space starting from the ton bag feeding station. The material enters the mixing tank through vacuum feeding in the dust-free feeding room, and is then equipped with a back blowing dust removal device at the top of the mixing tank to control the dust content to ≤ 30mg/m ³, Reduced dust pollution to the environment.

Powder feeding

  2. Accurate ingredient measurement ensures product consistency; The accuracy of the formula is related to the consistency of product quality. The Langling automatic batching system is designed with a 0.2% batching accuracy, and a high-precision brand weighing module is selected to stably mix the materials.

measuring pocket

  3. Disperse and circulate grinding materials; When dispersing materials, the D50 particle size of the material can reach below 30um through the dual dispersion structure of a high shear homogenization pump and a mixing tank dispersion machine. After the material enters the cyclic grinding process, the Langling rod pin nano sand mill can be used for high flow continuous and cyclic grinding, with an efficiency increase of 30-50%. The discharge particle size can reach 200-400nm, taking into account both quality and efficiency.

Grinding section

  4. The pipeline is easy to clean and the slurry is not blocked; The pipeline for transporting slurry to the pre mixed tank has been arranged reasonably. Considering the possibility of congestion caused by excessive flow during the transportation of slurry to the pre mixed tank, the diameters of the main and branch pipes are designed based on the slurry flow rate. The slurry can smoothly pass through each branch pipe without pressure, without blockage, with fast discharge and easy cleaning.

Pipeline layout

Implement intelligent control and management:

  1. PLC modular automatic control; The device can achieve unmanned operation, and the operation of the control points on the display screen is controllable and observable, with the function of device abnormal alarm;

  2. Parameter management: Manage formula parameter adjustment, automatic recording of data, generation of instructions for automatic production, and monitoring of operating parameters through an intelligent production MES system;

  3. Centralized control management: The central control room can monitor the production situation of the entire workshop and synchronize with on-site management.

Central Control Room 

Practical experience:

  At present, this solution has been applied to multiple lithium iron phosphate production lines, helping enterprises achieve digital and intelligent production. Langling has verified through practice that the 10000 ton production line only requires 2-3 workers per shift.

  Langling has rich experience in production line construction, a highly qualified technical team, and over 160 successful EPC cases are produced according to standards. 80% of the components in the production line are processed in the factory, which can better adapt to the operation of the production line, promote production transformation and upgrading, and enhance the competitiveness of the enterprise!