Reasons why silicon carbide rods are prone to burning out
Release time:
2025/02/26
The main reasons why silicon carbide rods are prone to burning out include the following points:
Usage time and temperature: The lifespan of silicon carbide rods is usually around 270 days. If the usage time is too long or the working temperature is too high, it can easily lead to the burning out of the silicon carbide rods. Especially when the furnace temperature exceeds 1600℃, the oxidation rate accelerates, significantly shortening the lifespan of the silicon carbide rods.
Poor cooling: Poor cooling of the electric arc furnace can lead to excessively high temperatures, causing severe damage to the silicon carbide rods, even burning them out.
Quality issues with cables and joints: If there are quality issues with the cables and joints, it can lead to unstable current, resulting in overheating and burning out of the silicon carbide rods.
Operating environment: In a high-temperature furnace, silicon carbide rods not only have to withstand high temperatures but also face rapid temperature changes. This frequent alternation of thermal expansion and contraction can cause stress concentration in the internal structure of the silicon carbide rods, ultimately leading to fracture or burning out. Additionally, the atmosphere inside the furnace can also affect the lifespan of the silicon carbide rods; an oxidative atmosphere can accelerate the oxidation of the silicon carbide rods, while a reducing atmosphere may lead to surface carbonization, and these chemical changes can weaken the mechanical strength of the silicon carbide rods.
Improper installation and use: Incorrect installation methods and usage habits are also reasons for the vulnerability of silicon carbide rods. For example, failing to ensure an even gap between the silicon carbide rod and the furnace wall during installation, or frequently starting and stopping, or overloading during use, can put tremendous pressure on the silicon carbide rods, accelerating their aging and damage.
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