REC fluidized bed granular silicon technology
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How much do you experts know about REC’s fluidized bed particle silicon technology that uses silane gas as the feed gas? The cost of this technology is 20% lower than that of the traditional Siemens method, and it has many advantages. I wonder how its development is progressing? It is said that the factory in the United States started operating in March, but due to some unstable parameters and for safety reasons, it was shut down for maintenance; it resumed operation in April. I’m not sure what happened afterwards Does anyone know anything? Let’s discuss it together!
I heard some time ago that production would be reduced by 3,500 MT
It seems that it would be better to use chlorosilanes as the raw material in the fluidized bed process…… Silane gas is expensive and highly dangerous
Silane gas deposition should have a higher efficiency than chlorosilane reduction deposition using hydrogen in a fluidized bed; otherwise, why would REC convert TCS into silane gas before feeding it into the fluidized bed to produce granular silicon? The reason for this is unknown; it might be related to the entire industrial chain and the whole manufacturing process
The purity obtained using silane gas should be higher than that of chlorosilanes; this might be a factor to consider
Which company is on the floor above?
REC’s fluidized bed technology offers significant advantages in terms of energy savings. Siemens TCS method: 70~120 kwh/kg; Siemens silane method: 70~120 kwh/kg; fluidized bed silane method: 10+kwh/kg. Its biggest drawback is the high level of danger involved.
The one-way process in a silane fluidized bed is relatively energy-efficient; however, the cost of producing silane is likely to be high. When taking everything into account, it’s unclear what the actual cost will be
The cost isn’t high; it’s just too dangerous, as silane gas is extremely unstable.
The FBR of REC operates for 6 months before it must be shut down for 3 months in order to clean its inner walls; otherwise, these walls thicken by 50 mm and need to be cleaned. If shutdown is not desired, it is still necessary to stop operation