Polycrystalline silicon purification or silicon liquid leakage defense device of ingot furnace

Abstract

The invention provides a silicon liquid leakage protection device used for a polysilicon purification or ingot furnace, comprising a crucible and a platform; the crucible is arranged on the upper surface of the platform; the silicon liquid leakage protection device is characterized in that the device also comprises a chamfer and a coagulating basin; the upper surface of the platform is provided with a plurality of radial diversion troughs and a plurality of axial diversion troughs; the chamfer is arranged at the periphery of the bottom of the platform; the coagulating basin is arranged on the lower surface of the platform and surrounds the platform by one cycle; the internal circumference of the coagulating basin is arranged inside the chamfer and the external circumference thereof extends to the external surface of the platform; when the silicon liquid leakage protection device used for the polysilicon purification or ingot furnace is adopted, the leaked silicon liquid can completely flow into the coagulating basin by the diversion trough on the platform no matter where the leakage occurs on the crucible, thus preventing the occurrence of equipment damage and explosion and protecting the safety of operators in front of the furnace.

Description

technical field [0001] The invention belongs to the field of polysilicon purification or ingot casting, in particular to a silicon liquid leakage protection device for polysilicon purification or ingot casting furnace. Background technique [0002] When vacuum smelting and purifying solar polysilicon or polysilicon ingot casting, due to various reasons, the crucible carrying the silicon material will inevitably rupture, resulting in leakage of silicon liquid. Once the silicon liquid leaks, it will damage the mechanism supporting the crucible (usually graphite). In serious cases, the bottom of the furnace will be melted through, and the cooling water on the furnace wall will come into contact with the high-temperature silicon liquid, resulting in an explosion and even personal injury or death. [0003] Leakage of silicon liquid is caused by many reasons, such as invisible defects in the crucible itself, chemical reaction between silicon liquid and the crucible or its surface ...

AI Technical Summary

Problems solved by technology

Despite various measures, silicon liquid leakage is still unavoidable during polysilicon ingot casting and purification

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