Graphite protection board for ingot crucible
A graphite shield and crucible technology, which is applied in the field of polysilicon ingot furnace equipment, can solve the problems of deformation and damage of the cover plate, and the shield plate is easily damaged, and achieves the effects of saving production costs, facilitating assembly and disassembly, and having a simple structure.
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[0023] The specific implementation of the present invention is as follows:
[0024] Such as figure 2 As shown, when in use, four graphite guard plates 1 are connected in sequence to form a rectangular parallelepiped space that can surround the crucible, and two pieces are realized by the bolts passing through the positioning hole 3 and the threaded holes 2 on the adjacent graphite guard plate 1 on the left. The connection of the graphite guard plate 1; after the assembly is completed, cover the cover plate for polysilicon ingot casting. During the ingot casting process, argon gas is continuously introduced to the surface of the silicon liquid through the ventilation hole 4, and the precipitated impurities are guided and discharged by the airflow, thereby improving the ingot quality;
[0025] When the bolt expands due to thermal expansion, there will be a gap in the anti-breaking groove to allow the bolt to play a certain buffering effect; and when the bolt is broken in the thread...
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