Polycrystal ingot casting furnace for preventing silicon leakage in thermal field

Abstract

The invention discloses a polycrystal ingot casting furnace for preventing silicon leakage in a thermal field. The polycrystal ingot casting furnace comprises a furnace body and a ceramic crucible arranged in the furnace body, wherein a heat exchange block is arranged at the bottom of the ceramic crucible. The polycrystal ingot casting furnace is characterized in that a silicon leakage prevention mechanism is arranged at the bottom of the furnace body and comprises at least two layers; the first layer is an aluminum oxide fiber felt or a magnesium oxide fiber felt, and the second layer is carbon fiber woven cloth. The polycrystal ingot casting furnace is simple in structure; due to the adoption of the simple multilayer design, an effect that the polycrystal ingot casting furnace prevents silicon leakage in the thermal field can be achieved, and melted silicon liquor with the temperature of more than 1,415 DEG C, which exudates out of the aluminum oxide or magnesium oxide fiber felt, can be effectively avoided after silicon is leaked; meanwhile, a contact area between high-purity quartz glass and metal at the bottom of the furnace is small, so that the heat conduction coefficient is low, flow out of heat is effectively prevented, and an effect of guaranteeing the safety is achieved.

Description

technical field [0001] The invention relates to an ingot casting furnace, in particular to a polycrystalline ingot casting furnace capable of preventing silicon leakage in a thermal field. Background technique [0002] The polysilicon ingot furnace is a special equipment designed for the solar energy industry and is a necessary equipment for polysilicon ingot casting. This type of equipment can complete the ingot casting process automatically or manually, with high efficiency and energy saving. It uses advanced computer control technology to achieve stable and directional solidification. The polycrystalline silicon ingots produced are of high quality and large specifications. However, in the process of polysilicon ingot casting, there will be silicon leakage, that is, silicon crystals will leak from the bottom of the furnace body, which will easily cause accidents. However, the existing anti-leakage technology is to use alumina fiber felt or Magnesium oxide fiber felt is us...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the defect that the existing polysilicon ingot furnace is easy to leak silicon crystals or the leak-proof material is easy to cause corrosion of stainless steel, and provides a polycrystalline ingot furnace that prevents silicon leakage in the thermal field to solve the above problems

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