rotary kiln used in the production of lithium iron phosphate

Rotary Kiln for LFP Calcination

Kiln Body Length: 15 m

Production Capacity: 4 T/H

Calcination Temperature: 600~1100 ℃

Application: Calcination of Lithium Iron Phosphate (LFP)

Rotary Kiln for Energy-Efficient LFP Calcine

As the global clean energy industry continues to thrive, the demand for lithium-ion batteries is increasing rapidly. To meet this growing international need, AGICO CEMENT has developed a state-of-the-art indirect rotary kiln specifically designed for calcining lithium iron phosphate (LFP), a critical cathode material for lithium-ion batteries. Our rotary kiln is engineered with the unique characteristics of LFP materials in mind, offering an advanced, highly mechanized calcining solution.

Our rotary kiln stands out with its low resistance to fluid flow through the cylinder, ensuring minimal energy consumption and robust adaptability to various materials. It is an ideal solution for the high-temperature solid-phase synthesis method, the most widely used and mature process for industrial LFP production.

In the industrial production of lithium-ion battery cathode materials, achieving a controlled high-temperature environment is crucial. Our rotary kiln provides this precise environment, enabling the LFP precursor to undergo the necessary reactions at elevated temperatures. The result is LFP material with excellent crystalline structure and superior electrochemical performance.

Experience the pinnacle of efficiency and innovation with our LFP rotary kiln, designed to power the future of energy storage solutions. Contact us now to get a quote!

The indirect rotary kiln for cathode material

High LFP Quality Achieved by Dynamic Heating

The material to be calcined is added to the inner cylinder of the rotary kiln. The cylinder is heated uniformly by electric resistance wires, creating a consistent radiant heat environment that ensures the material reaches the desired calcination temperature effectively.

During the calcination process, the rotary kiln cylinder rotates slowly to form dynamic calcination. Compared to static crucible loading method, it overcomes issues such as under-burning, over-burning, and uneven burning, thereby improving the reaction time and quality uniformity of the powder materials. In addition, compared to static calcination, the dynamic calcination of LFP requires a lower temperature, saving energy consumption in the production process.

LFP Rotary Kiln Design Highlights

Our rotary kilns are designed with cutting-edge technology to offer outstanding performance in the calcination of lithium iron phosphate (LFP) and other cathode materials. Crafted with meticulous attention to detail, AGICO rotary kilns incorporate advanced materials and innovative engineering to ensure superior performance and reliability.

High-Temperature Resistant Inner Kiln

The inner kiln chamber is constructed from seamless stainless steel SUS310S, renowned for its exceptional high-temperature resistance. This ensures longevity and consistent performance even under the most demanding conditions.

Efficient Heating Principle

The kiln utilizes cavity-type resistance wire plate heating, which boasts high thermal efficiency and excellent temperature uniformity. This design ensures that the LFP materials are heated evenly, promoting optimal reaction conditions and high-quality output.

Precision Mechanical Transmission System

The rotary kiln features a robust mechanical transmission system with AC variable frequency speed control. This allows for precise and intuitive speed adjustments, ensuring smooth and reliable operation tailored to the specific requirements of the calcining process.

Advantages of Rotary Kiln LFP Calcine

Uniform Heating and Mixing

The rotary kiln’s rotational motion ensures the dynamic calcining of materials, promoting thorough mixing and even heating. This uniformity is crucial for the performance of LFP materials, as it prevents issues like localized overheating or under-burning, ensuring the stability and consistency of the final product.

Precision Atmosphere Control

Our rotary kiln features a dynamic sealing system with excellent airtightness. The indirect heating method allows for precise control of the kiln atmosphere, enabling the maintenance of an inert gas environment (such as nitrogen) or a reducing atmosphere (such as hydrogen). This capability prevents oxidation or unwanted reactions with moisture in the air at high temperatures, safeguarding the integrity of the materials.

Continuous Production Capability

Designed for large-scale continuous production, our rotary kiln can handle uninterrupted feeding and discharging of materials. This continuous operation significantly boosts production efficiency, making it ideal for meeting the growing market demand for lithium iron phosphate materials.

Advanced Energy Management

Equipped with an advanced energy management system, our LFP rotary kiln optimizes fuel usage and incorporates heat recovery systems to minimize energy consumption. This not only reduces production costs but also aligns with environmental sustainability goals.

Product Specifications

  • Dimensions: L15000 × W1800 × H2850 mm
  • Rotary Body Size: Hexagonal inscribed circle diameter Ф800 × 13000 mm
  • Operating Temperature Range: 600℃ to 1100℃
  • Temperature Zones: 4 zones with 4 control points (designed according to process requirements)
  • Heating Elements: Electric resistance wires
  • Cylinder Material: Heat-resistant alloy SUS310S
  • Cylinder Rotation Speed: 1-5 RPM (adjustable)
  • Heating Power: Rated power 100 KW

LFP Rotary Kiln Structural Components

1. Rotary Drum

The rotary drum is constructed from 310S heat-resistant steel, capable of withstanding temperatures up to 1500°C and resistant to corrosion from common acids, bases, and salts. Inside the drum, lifter plates are installed to ensure that the materials are evenly heated as they tumble during rotation. Materials are fed into the drum at the front end and move towards the rear as the drum rotates, undergoing preheating, calcination, and finally discharge.

2. Transmission and Support Mechanism

The drum is supported by front and rear support rollers and features a drive gear ring mounted on its outer wall. It is driven by a variable frequency motor, a reducer, and a pinion gear. The rotational speed of the rotary drum can be adjusted between 1 and 5 RPM. The transmission mechanism and the heating furnace body are all mounted on an integrated base for stability and ease of installation.

3. Feeding Mechanism

The feeding mechanism comprises a feed hopper, a feeder, and a feeding platform. The feed hopper and feeder are made of 304 stainless steel. The feeding speed is controlled by a variable frequency motor to ensure precise and adjustable material input.

4. Feeding and Discharging End Hoods

The end hoods are constructed from 304 stainless steel and feature clean-out ports at the bottom for the periodic removal of accumulated material. The flexible and elastic sealing method between the hoods and the drum minimizes dust leakage and maintains a clean operating environment.

5. Heating Furnace

The heating furnace is situated in the middle part of the drum, heating the outer wall of the drum externally. The heating elements are positioned beneath the drum, ensuring uniform heating of the materials as the drum rotates. These elements are high-temperature alloy rod-type elements, made from 0Cr27Al7Mo2, which are easy to replace and highly durable. The elements are installed at the furnace base, supported by high-alumina ceramic tubes for stability and reliability.

6. Refractory Lining

The furnace lining is composed of refractory bricks, insulating castable, and high-alumina castable materials, providing excellent insulation, minimal heat retention, rapid heating, and energy efficiency. The furnace shell is constructed from steel plates and structural steel, fixed to the transmission support frame, and secured to the integrated base for enhanced stability and durability.

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