What is the reason for the uneven temperature of silicon rods in the reduction furnace?
Thread Content
Recently, after increasing the air intake volume, the temperature of the silicon rods varied from one end to another; the temperature at the lower part was on average 30 degrees higher than that at the upper part. Has anyone encountered a similar problem?
It’s normal; when the amount of material fed into the reaction process is increased, the crossbeam area receives an adequate supply of material. The gas flow inside the furnace moves from the inner circle downward, in a turbulent manner. As a result, the temperature at the lower part of the silicon rod is significantly higher than that at the upper part. There’s no need to worry about this – it’s sufficient to ensure that the current is adjusted in a timely manner during operation, so as to prevent excessive temperature differences from causing the rod to collapse.
That makes sense. I agree with what was said above; logically, the temperature at the upper part of the silicon rod should be higher than that at the lower part. However, the fact that the temperature at the lower part is higher than at the upper part is due to an increased amount of reactant material, which results in more material being present at the lower part and thus absorbing the heat from there.
I believe this problem can be solved from a technical perspective by reducing the temperature difference between the upper and lower parts of the silicon rod, especially the temperature gradient between the inner and outer sections of large reduction furnaces
It seems that everyone upstairs is from the polysilicon industry; impressive! In my opinion, attention should be paid to the overall shape of the silicon rod to prevent deformities or even the rod from tipping over during the growth process
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As mentioned above, a temperature difference between the upper and lower parts of the silicon rod is normal; the temperature is higher in the central area and at the bottom of the crossbeam, while it is lower at the top of the crossbeam and at the bottom of the silicon rod. This temperature difference can be reduced by controlling the volume and distribution of air
Not bad, I’ve learned it, hehe
I’ve learned it, thank you:handshake