Can industrial multi temperature zone rotary furnaces burn battery materials?

The industrial multi temperature zone rotary furnace can be used for firing battery materials, especially in the large-scale production of positive and negative electrode materials for lithium-ion batteries. Its multi temperature zone independent temperature control, dynamic heating, and atmosphere control technology can accurately meet the material synthesis requirements, improve battery performance and consistency. The following is a specific analysis:

1. Sintering of positive electrode materials for lithium-ion batteries
Three element materials (NCM/NCA):
It needs to be sintered at 800-900 ℃ and is sensitive to oxygen content (high nickel materials require a high-purity oxygen atmosphere). The industrial multi temperature zone rotary furnace can achieve precise curve management of heating constant temperature cooling through multi-stage temperature zone control, avoiding thermal stress cracking. For example, when NCM811 material is sintered in an oxygen atmosphere, a temperature control accuracy of ± 5 ℃ in the temperature zone can ensure ordered growth of the layered structure and improve the efficiency of initial charge and discharge.
Lithium iron phosphate (LFP):
The sintering temperature is about 750-780 ℃, and it needs to be carried out in an ammonia or nitrogen protective atmosphere to prevent Fe ² ⁺ oxidation. The dynamic rotation of the rotary furnace evenly heats the material, combined with inert atmosphere control, which can suppress the generation of impurities and improve the conductivity of the material. Some processes also optimize performance through the synergistic effect of carbon coating and reducing atmosphere.

2. Treatment of negative electrode materials for lithium-ion batteries
Silicon based material processing:
When processing silicon-based negative electrode materials in a rotary furnace, multi temperature zone control can alleviate the problem of volume expansion and improve cycling stability.
Silicon carbon composite material:
Silicon particles are prone to expansion at high temperatures, and the dynamic motion of the rotary furnace promotes the uniform bonding of silicon and carbon, forming a stable structure. By controlling the temperature in multiple temperature zones, the lithium insertion path of silicon particles can be optimized, reducing the damage to the electrode caused by volume changes.

3. Technological advantages support the firing of battery materials
Temperature uniformity:
Dynamic rotation causes the material to continuously roll, eliminating local overheating. The temperature control accuracy within the temperature range is within ± 53 ℃, ensuring consistent crystal structure of the material. For example, during the sintering of ternary materials, a smooth transition in the temperature range can avoid lattice defects and improve material capacity.
Accurate control of atmosphere:
Support oxidizing/reducing atmosphere and inert gas protection to meet different material requirements. For example, sintering lithium iron phosphate in nitrogen can prevent Fe ² ⁺ oxidation, while sintering lithium cobalt oxide in oxygen can promote lithium diffusion.
Continuous homework ability:
Materials are continuously added from one end and discharged from the other end, achieving 24-hour uninterrupted production.