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Pusher Kiln

pusher kiln

Pusher Kiln Specification

Fuel: electricity, natural gas

Maximum temperature: 1650℃

Application: Lithium-ion battery anode materials, lithium-ion battery cathode materials, electronic ceramics, functional ceramics, magnetic materials, electronic powders, and electronic components.

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A pusher kiln (also known as a pusher furnace or pusher slab kiln) is a continuous sintering kiln used for material heating in high-temperature sintering processes. Pusher kilns are widely used in the production of lithium-ion battery anode and cathode materials, ceramics, powder metallurgy, abrasives, and chemical products.

Working Process of Pusher Kiln with Continuous Operation and Stable Production

The working principle of a pusher kiln is relatively simple. Materials are placed on the pusher plates, and through the continuous movement of these pusher plates, the materials slowly move along the kiln body. The interior of the pusher kiln is divided into several heating zones, with the temperature gradually increasing in each zone until it reaches the sintering temperature, after which it gradually decreases. This entire process is continuous, with the materials undergoing heating, constant temperature, and cooling phases in different zones, ultimately achieving the purpose of sintering.

pusher kiln working process
Pusher kiln working process

Loading: The materials are placed on the pusher plate, and the pusher plate is pushed into the kiln through mechanical or hydraulic devices.

Heating: The material moves slowly with the pusher plate, enters different heating zones in turn, and gradually heats up to the sintering temperature.

Sintering: In the high-temperature zone, the materials are kept at a constant high temperature for sintering to ensure that the physical and chemical properties of the materials meet the expected requirements.

Cooling: After sintering is completed, the material continues to move to the cooling zone and gradually cools down to prevent material cracks or deformation caused by sudden temperature drops.

Discharge: The cooled material is pushed out of the kiln by the pusher plate to complete the entire sintering process.

The Structural Design of Each Part of the Pusher Plate Kiln is Reasonable

Pusher plate system
Pusher plate system
Pusher kiln outlet
Pusher kiln outlet
Propulsion device
Propulsion device

Kiln body: The main body of the pusher furnace is composed of the kiln body, which is usually made of refractory materials and can withstand high temperatures.

Pusher plate system: The pusher plate is the key component of the pusher kiln. Materials are placed on the pusher plate and pushed along the length of the kiln body through mechanical or hydraulic devices, and the materials placed on it pass through the kiln. This design ensures that the material remains in a stable position during the firing process and avoids possible damage during movement.

Track structure: The track structure inside the pusher slab kiln is designed to support and guide the movement of the pusher plate. Tracks are usually made of high-strength, heat-resistant materials that can withstand long-term use in high-temperature environments.

Heating system: There are usually multiple heating zones in the kiln, which can be heated either electrically or by natural gas. The temperature of each heating zone can be controlled independently to meet the sintering curve requirements of different materials and different stages.

Refractory materials: The interior of the pusher kiln is usually lined with refractory materials to prevent high temperature damage to the kiln body while maintaining the stability and uniformity of the temperature within the pusher kiln.

Cooling zone: After the sintering is completed, the material needs to be cooled through the cooling zone to ensure that the physical and chemical properties of the material are stable.

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The Production Process of the Pusher Kiln has Numerous Advantages

Because the heating zones of the pusher kiln can be independently controlled, it offers precise temperature management to meet the sintering requirements of different materials. The pusher slab kiln is suitable for large-scale continuous production, effectively enhancing production efficiency. It is also versatile for materials of various shapes and sizes, particularly for larger or heavier products. The pusher slab kiln’s structure is relatively simple, making maintenance easy, and it ensures uniform heating within the kiln, resulting in more consistent product quality. The high level of mechanization and automation in the feeding and pushing systems reduces manual operation, further increasing production efficiency.

Pusher Kiln has Numerous Advantages
Pusher Kiln has Numerous Advantages

Large bend cavity structure offers good stability and uniform furnace temperature.

The stable transmission method ensures smooth advancement without creeping or shaking.

Fully automated rotary motion, controlled by PLC, enhances reliability.

The temperature control system uses silicon-controlled rectifiers (SCR) for automatic voltage adjustment, featuring soft start, soft shutdown, constant current, and constant voltage functions.

Intelligent control instruments provide precise control.

Pusher Kiln is Suitable for Various Process Flows and Application Fields

The pusher kiln is suitable for various process workflows

Pusher Kiln is Suitable for Various Process Flows
Pusher Kiln is Suitable for Various Process Flows

Calcination

Sintering

Pyrolysis

Carbonization

Degreasing

Rapid cooling

Other special processes

The pusher kiln can be applied to the manufacturing of products in various industries

Lithium-ion battery industry: lithium-ion battery cathode materials, lithium-ion battery anode materials.

Electronic Ceramics Industry: Ceramic capacitors, structural ceramics, alumina ceramics, varistors.

Solar Cell Industry: New materials for solar energy, polycrystalline silicon, monocrystalline silicon.

Powder Metallurgy Industry: Cobalt powder, ultrafine nickel powder, vanadium pentoxide, high-tin copper alloy powder.

Glass Industry: VFD glass heat treatment, coating and encapsulation, liquid crystal display substrate glass.

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