What are the specific processes used in large-scale domestic polysilicon projects?
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In terms of which aspects do the technologies of large-scale polysilicon projects in China perform well currently? Let’s talk about it if you know. I understand that it’s more common in Leshan, Sichuan. What are everyone’s thoughts on the overall trend? Thank you! ! ! Communicate with each other. . .
Currently, the main process is cold hydrogenation; the necessary process packages are available in China, provided by institutions such as the Sixth Academy and Zhongsi； Abroad, there are 3P, GT, LXE, DEI, etc
For large-scale polysilicon projects, it is better to adopt an improved Siemens process; other metallurgical methods or silane-based methods are inevitably a form of deception by some people.
There are many improved Siemens models available in China, but the silane method is also widely used by Americans – so how can it be considered deception?
Reply to 3# zhangweicheng: If it’s all nonsense, it would be good if there was something real after all. What do you think? Take Ningxia Yinxing and Shanxi Nake as examples – do you have any idea to what extent deception goes?
The main domestic processes include the modified Siemens method, the metallurgical method, and the silane method. But within this, detailed classification is also required
Reply to 4# hilul418: It seems you have misunderstood my meaning. When I said that the silane method and physical methods are prone to being exploited by some people, I was referring to the fact that there are currently individuals who pose as experts; they actually have only a superficial understanding of these two processes and exaggerate their benefits, in an attempt to take advantage of business owners’ eagerness to reduce costs during this tough period for polysilicon production. I in no way intend to deny the silane method or physical methods; please be assured of this.
Reply to 6# qingfengzhiyou: I really know very little about these two companies you mentioned. Additionally, the meaning of “deceive” as I use it is different from what you understand by it; perhaps you could provide more details about these two companies or about the current development of the “metallurgical method”.
Polysilicon can be produced through physical and chemical methods; the improved Siemens process, which is currently the most widely used, belongs to the chemical method. The metallurgical method is used for processing materials; several companies are currently employing this process. Its drawback is that the precision is not high enough to meet electronic-grade requirements