Roller Hearth Kiln (RHK), which is a roller conveyor type kiln, makes whole firing process from conveying the products to packing one continuous line. This contributes to the great reduction of manpower, and the shortened firing time results in the energy conservation. Since RHK is constructed tough enough to withstand rapid heat up and cool down, the flexible operation, which meets any firing condition, is available.
Firing kiln for lithium-ion battery materials
The Roller Hearth Kiln is a continuous rapid firing kiln that transports the products on rollers inside the kiln.
This system is able to provide firing conditions that meet our customers’ needs through the use of
atmosphere control for air, N,O,N+H, and other atmospheres, as well as precision temperature 2222
control for each temperature zone (preheating, firing, cooling).
We offer integrated systems for production of the cathode material and anode material used in lithium-ion batteries.
,O,N+H,Air Atmosphere N2222
Heater type SiC heater, Gas
Roller NEWSiC, Mullite
Features of Roller Hearth Kiln
1.Improves product performance.
Atmosphere control technology
OAtmosphere control compatible with O concentrations from below 50 ppm to 99% or more. 22
Flow of air supply/exhaust
Lateral cross section
Longitudinal cross section
Precision temperature control
Maintains even temperatures inside the kiln by creating an unheated zone in the kiln center that allows
superb temperature uniformity
2.Reduces costs (saves time, space, etc.). High productivity
NGK wide rollers allow 6-row, 1-level and 6-row, 2-level transport, increasing surface area productivity by 1.5 – 3 times conventional values.
The combination of low thermal conductivity insulator and 6-row transport reduces energy consumption by 30% or more.
Atmosphere gas volume
The use of a special seal structure and flat ceiling in the drive section reduces atmosphere gas volume by 20%.
3.Promises stable operation.
The use of ceramic components eliminates metal contact.
Total engineering for preceding and following systems
Complete powder handling from material supply to product exit.
Rollers for stable product transport
The use of a universal joint supported on both sides prevents meandering.
Sagger transport system for firing of lithium-ion battery cathode material (example)
NGK has an extensive successful record in firing kiln systems, including transport systems, for the cathode materials of lithium-ion batteries.
We will provide the optimal system for each type of cathode material and production volume.
NGK Kiln Components and Materials
NGK manufactures its own high-quality kiln components and materials.