Graphitization Furnace

Graphitization Furnace Description:

The graphitization furnace uses medium-frequency induction heating technology. A thyristor frequency conversion device is used to pass intermediate frequency current into the spiral tube induction coil to generate an alternating magnetic field. The graphite heating element in the coil generates an induced current under the action of the alternating magnetic field. Due to the obvious skin effect, its outer layer forms an extremely dense short-circuit current loop. Under the action of its graphite resistor, a concentrated and powerful heating effect is produced. The temperature of the heating zone can be as high as 3000°C in good heat preservation, vacuum, or protective atmosphere.

Graphitization involves heating the product to a high temperature above 2400°C in the presence of a protective medium. A high-temperature heating process that transforms amorphous turbostratic carbon into three-dimensional ordered graphite crystals. Graphitization improves the product’s volume density, electrical conductivity, thermal conductivity, corrosion resistance, and machining performance.

Application:

Graphitization of new carbon materials. Including lithium battery negative electrode artificial graphite, carbon fiber, graphene, high thermal conductivity graphite, carbon fiber composite materials (C/C composite materials, C/ceramic composite materials), and other materials
Natural graphite purification

Graphitization Furnace features:

• Depending on the materials that need to be graphitized, you can choose the horizontal front/rear door loading and unloading structure. Or the vertical top/bottom door loading and unloading method. The working hot zone is available in cylindrical and square shapes.
• Using the induction heating method, the maximum temperature can reach 3000°C under an inert atmosphere, with a high heating rate and energy saving.
  It uses graphitized soft felt as insulation material and high-purity graphite as heating element material. High-purity graphite has a specific gravity of 1.7g/cm2, a thermal conductivity of 116w/mk, and a surface void ratio of <3%. Effectively improve the thermal insulation performance, and temperature uniformity and extend the service life of the furnace. Under a limited power supply, it reduces heat dissipation. It greatly reduces the heating power at the same temperature. Thermal field materials are easy to replace.
• The induction coil is made of high-purity oxygen-free copper and has low electrical loss. It uses corundum curved bricks as an insulation layer, which is high temperature resistant, easy to replace, and has good insulation and heat preservation properties.
• Use an optical pyrometer to measure and control temperature (1000℃-3200℃). It equips a thermocouple (0-1600°C) for the low-temperature section, which can automatically switch between high and low temperatures to achieve full temperature control.
• The main components are imported from well-known brands, with high measurement and control accuracy.
• The furnace has high safety, safety interlocking, and automatic alarm. The furnace body equips an explosion-proof valve, cooling water alarm device, over-temperature alarm in the furnace, over-current and over-voltage protection, etc.
• Fully automatic control (retaining manual control), human-machine interface operation, full data monitoring and storage

Technical Parameters:

Optional configuration:

• One power cabinet for two/ three/ four furnace body configurations. One power supply and control cabinet can heat and control multiple furnace bodies in turn, saving time and cost.
• Chiller/Cooling Tower – for closed-loop cooling
• Gas purifiers – used to remove impurities from gas supplies
• High vacuum