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Polysilicon ingot furnace

A technology of polysilicon ingot casting furnace and furnace body, which is applied in the direction of polycrystalline material growth, crystal growth, single crystal growth, etc., to achieve the effect of eliminating the danger of explosion

Active Publication Date: 2014-03-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to avoid such an explosion hazard when silicon liquid leaks, it is necessary to improve the structure of the existing polysilicon ingot furnace to solve the explosion hazard that exists when silicon liquid leaks

Method used

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  • Polysilicon ingot furnace

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Embodiment Construction

[0023] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings, which are not drawn to scale for the convenience of illustration.

[0024] Such as figure 1 As shown, a 450-type polysilicon ingot casting furnace in the prior art is provided with a crucible 1 in the furnace body, a cooling water interlayer 3 at the bottom of the furnace body, and a steel pipe 2 for extending thermocouples into the furnace. The steel pipe 2 is connected with the bottom center 4 of the furnace body by welding. In actual production, the high-temperature silicon liquid flows out from the crucible 1, which will melt the steel wall, especially the weld at the center of the bottom 4 is easy to be melted through, thus causing the cooling water in the cooling water interlayer 3 to enter the furnace body. Under the high temperature above 1000℃ in the furnace, the water evaporates rapidly to form high-temperature water vapor, and part of ...

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Abstract

The invention discloses a polysilicon ingot furnace which comprises a furnace body, a cooling water interlayer penetrating through the bottom of the furnace body, a cooling water inlet and a cooling water outlet, wherein the cooling water inlet and the cooling water outlet are communicated with the cooling water interlayer respectively; three-way valves are arranged at the cooling water inlet and the cooling water outlet respectively and used for guiding cooling water into the cooling water inlet or out of the cooling water outlet and can be connected with the outside atmosphere; and a water escape valve opened from the outside is arranged at the bottom of the furnace body and communicated with the cooling water interlayer. According to the polysilicon ingot furnace, when a silicone fluid in a crucible is leaked, the cooling water in the interlayer of the furnace body can be evacuated timely, so that the explosion danger after the silicone fluid is leaked is eliminated.

Description

technical field [0001] The invention relates to polycrystalline silicon ingot casting technology, in particular to a polycrystalline silicon ingot casting furnace. Background technique [0002] The polysilicon ingot furnace is mainly used for the large-scale production of solar-grade polysilicon ingots. It adopts polysilicon directional solidification technology, melts the silicon material at high temperature and then directional condenses and crystallizes it through a special process, so as to meet the quality requirements of polysilicon for solar cell production. It is an applicable It is an intelligent large-scale production equipment with high precision, high reliability and high degree of automation, which can work continuously for a long time. Among them, the 450-type polysilicon ingot furnace is more commonly used. This type of equipment can complete the ingot casting process automatically or manually, with high efficiency and energy saving. It uses advanced computer ...

Claims

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Application Information

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IPC IPC(8): C30B28/06C30B29/06F27D1/12
Inventor 周继承刘涵坚朱贝黄凯欣苏炯锋魏铭军李家栋
Owner CENT SOUTH UNIV
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