Why chooseing vertical graphitis furnace?
Release time:
2025-07-10
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Abstract
1. High temperature uniformity and product quality
Small temperature gradient: Vertical structure facilitates natural convection of hot air flow, more uniform temperature distribution in the furnace, especially suitable for the production of temperature-sensitive high-end graphite materials (e.g., isostatically pressed graphite, high purity graphite), reducing internal stress and improving product consistency.
Reduce the impurity pollution: the material moves from top to bottom, less contact with the heating element (e.g. graphite electrode), reduce the risk of contamination, suitable for high purity requirements (e.g. semiconductor, graphite for nuclear industry).
2. Energy saving and thermal efficiency
Less heat loss: the vertical design of the furnace body reduces the surface area and lowers the radiation and convection heat loss; the high temperature zone is concentrated in the middle of the furnace body, which results in a higher heat utilisation rate (the energy consumption can be 15-30% lower than that of a horizontal furnace).
Waste heat recovery: Some vertical furnace designs can integrate a preheating zone, using the waste heat from the cooling stage to preheat the new material, further saving energy.
3. Space efficiency and scaled production
Small footprint: Vertical stacking designs are suitable for scenarios where plant height is adequate but floor space is limited (e.g. industrial parks).
Continuous production: Some vertical furnaces support a continuous charging-graphitising-cooling process to increase capacity (e.g., the modified vertical furnace for the Acheson process).
4. Process adaptability
Multi-field application:
Lithium battery anode materials: when dealing with artificial graphite, the uniform heating of the vertical furnace can optimise the structure of the carbon layer and improve the specific capacity and cycle life.
Special carbon materials: e.g. pre-oxidation of carbon fibre, high temperature treatment of graphene precursor.
Flexible temperature control: Through zoned heating (e.g. multi-electrode design), the rate of temperature rise/fall at different stages can be precisely controlled.
5. Maintenance and longevity
Low loss of refractory material: less thermal shock to the furnace lining in the vertical configuration, prolonging the service life (especially in scenarios where inert gas protection is used).
Easy automation: the vertical layout facilitates the integration of robotic or automatic feeding systems, reducing manual intervention.
6. Disadvantage avoidance compared to horizontal furnaces
Solving the pain point of horizontal furnaces:
The material in the horizontal furnace is easily deformed by its own weight, while the vertical furnace avoids this problem through the support design.
It is more difficult to control the temperature uniformity in the long axis of the horizontal furnace.
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Zhuzhou Chi Carbon Automation Equipment Co., Ltd
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