Home » Rotary Kiln For Lithium-ion Battery Material Production

Rotary Kiln For Lithium-ion Battery Material Production

Fully Automatic

Large Output

Uniform Heating

lithium ion battery material rotary kiln

Heating Temperature: 100-1300℃

Protective Atmosphere: N2, O2, C2H2

Kiln Length: 9-30m

Kiln Width: 800-1600mm

Temperature Control Precision: ± 3℃

Running Way: continuous feeding and discharging

Application: li ion battery anode and cathode material sintering

Heating Mode: fuel combustion (natural gas/ coal/ oil) and electric heating


With the steady increase in the demand for lithium-ion batteries from 3C products, the production scale of lithium-ion batteries has been expanding year by year. Cathode and anode materials are crucial raw materials required for lithium-ion battery production. They not only directly determine the quality of the batteries but also affect their cost. The cost of cathode materials accounts for approximately 35% of the total cost, while anode materials account for about 12%.

Cathode active materials mainly include ternary materials, lithium iron phosphate, lithium cobalt oxide, and lithium manganese oxide.

Anode active materials are mainly divided into carbon-based and non-carbon-based materials. Carbon-based materials are widely used in mass-produced lithium batteries, with artificial graphite accounting for 84% of the usage.

The preparation processes for cathode and anode materials are complex and distinct, but both include a high-temperature sintering step, with the core equipment being the sintering kiln. Various raw materials are mixed and dried before entering the kiln for high-temperature sintering to form the cathode and anode materials, followed by procedures such as crushing and grading. The temperature control, atmosphere control, continuity, capacity, energy consumption, and kiln automation degree are all crucial indicators for production. Currently, the equipment commonly used for sintering cathode and anode materials includes pusher kilns, roller hearth kilns, and rotary kilns. The design, temperature control, and automation of the first two kilns still need improvement. The rotary kiln is currently considered the developmental direction for the next generation of sintering equipment for lithium-ion battery materials.

AGICO is a professional rotary kiln manufacturer. Our indirect rotary kiln is an energy-efficient sintering kiln specially designed for the preparation of lithium-ion battery cathode and anode materials. The kiln environment can be customized to provide a reducing atmosphere, an inert atmosphere, or tailored to the specific process requirements of the customer, and it features an integrated mechanical seal. In terms of temperature control, the AGICO rotary kiln uses PLC multi-point segmented temperature control, allowing the heating rate to be set arbitrarily within the equipment’s rated power range.

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Why Choose A Rotary Kiln?

The rotary kiln realizes dynamic sintering, ensuring more uniform and stable mixing and heating of materials, thereby enhancing product stability and consistency.

The overall design concept of the rotary kiln is more advanced and scientific, featuring a compact structure, small footprint, and high sintering efficiency.

The rotary kiln effectively achieves high efficiency, energy savings, and emission reduction goals, significantly enhancing the reactivity of materials inside the kiln. It allows for much more precise temperature control compared to other equipment, especially in the second calcination process of cathode materials. For instance, for LiFeCoPO4 material, static state calcination may require 1200 degrees Celsius, whereas dynamic sintering only needs 950 degrees Celsius.

The rotary kiln can save production costs, achieve full automation, avoid excessive manual intervention and complex system operations, and reduce training and operational costs. Using LiFeCoPO4 cathode material as an example, one rotary kiln can handle the sintering capacity equivalent to that of 6 roller hearth kilns.

Highlights Of AGICO Rotary Kiln

The rotary kiln is equipped with well-designed guide plates and a material flipping structure, ensuring even heating of materials and minimal dust generation.

Our equipment is designed with energy efficiency in mind, utilizing various techniques such as waste heat recovery systems to improve overall energy utilization and reduce operational costs.

The heating chamber can achieve compartmentalized control with independent baffles in each compartment, ensuring minimal temperature interference between heating sections.

AGICO rotary kilns are equipped with controlled atmosphere systems, allowing precise control over the atmosphere inside the kiln, which is crucial for sensitive materials used in lithium-ion batteries.

The rotary kiln utilizes a programmable intelligent control system, combined with high-precision detection instruments, offering features such as high accuracy, ease of operation, convenient process adjustments, and stable operation. It incorporates functions for monitoring, controlling, interlocking, fault display, alarm, and protection related to operation, temperature, pressure, and other states.

agico lithium ion battery material rotary kiln
negative material carbonization furnace
li ion battery anode and cathode material production kiln
rotary kiln control system details

AGICO Li Ion Battery Material Rotary Kiln Design

Rotary Cylinder

The main body of the rotary kiln is a large, cylindrical shell usually made of 304/310S steel or other materials capable of withstanding high temperatures and corrosion. This cylinder is mounted at a slight angle to facilitate the movement of material through the kiln by gravity.

Support Rollers & Tyres

The kiln cylinder is supported on stationary support rollers and riding rings (tyres) that are attached around the shell circumference. These rollers and tyres help to maintain the kiln’s stability and allow it to rotate smoothly on its axis. The rotation speed is around 2-5 rpm.

Refractory Lining

The interior of the rotary kiln is lined with refractory bricks or castable refractory material. This lining protects the kiln shell from the high temperatures generated inside and helps to maintain thermal efficiency by minimizing heat loss.

Drive System

A rotary kiln is driven by a motor and gear mechanism that rotates the kiln slowly and steadily. This drive system ensures the controlled rotation of the kiln, which is critical for the uniform heating and processing of materials inside.

Gas Flow and Control Systems

For processes requiring controlled atmospheres or gas flow, rotary kilns can be equipped with gas injection systems, ductwork, and control valves to regulate the atmosphere inside the kiln during processing.

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.

rotary kiln and cooler
Rotary Kiln & Cooler Design
rotary kiln and cooler design
Rotary Kiln & Cooler Design

Why Choose AGICO

free consultation
One-to-one Free Consultation
after sales service
Attentive After-sales Services
Kiln Installation & Trial Operation
spare part supply
Full Range Spare Part Supplying
safe delivery
Safe & On-time Delivery