roller hearth kiln

By Lucille Rice,2014-07-11 10:06
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roller hearth kiln


    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.


    Temperature 1000?C,1200?C,1400?C

    ,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.

Energy saving

    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.

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