Discuss the pressures in the reduction furnaces of various polysilicon companies in the country currently; everyone is welcome to share their views actively
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This post was last edited by jindin312 on 2011-3-16 at 17:43. What is the normal operating pressure for reduction furnaces in China currently? I heard from a friend in the past that it was 3 kilograms. It is said that the higher the pressure, the faster and better the polycrystalline silicon deposition will be, right?
Actually, it has more to do with the temperature inside the furnace; temperature is the more significant and effective determining factor! !
High pressure also increases the risk; when the pressure is high, the sealing gaskets are often squeezed out, which can lead to leaks.
Currently, normal-pressure production is mainly used, with a pressure of about 0.08 MPa. Pressure-driven production mainly increases the density of the gas mixture, which in turn speeds up the reaction; however, this makes the corn-like structure on the silicon rods more severe. The pressure method has shortened the production cycle of polysilicon. At the same time, it also increases the requirements for the equipment and raises the risk factor. Some of the newly built factories now even use 0.6 MPa, but they have not yet started operation.
Our factory is 0. 5MP, but it hasn’t been put into production yet, haha
0.5MPa？ ? 5 atmospheres? It’s LS, right?
After 2008, it was basically 0.6 MPaG, with production starting earlier! 80-100 hours per furnace, 12 rod pairs; over 1.5T per furnace
At normal pressure, 3 barg, 5 barg, and 6 barg are all available
Indeed, 0.6 kilograms of pressure is quite high
It depends on whether your process design is for high pressure or low pressure; those designed for high pressure can reach 4 kilograms.