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A Type 450 Ingot Casting Furnace and Its Ingot Casting Process

A technology of ingot casting furnace and furnace cavity, which is applied in the direction of polycrystalline material growth, crystal growth, single crystal growth, etc., and can solve the problem of increasing the charging amount of 450 type ingot casting furnace

Inactive Publication Date: 2011-12-07
JIANGXI SORNID HI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a 450-type ingot furnace and its ingot-casting process to solve the problem of increasing the charging capacity of the 450-type ingot furnace

Method used

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  • A Type 450 Ingot Casting Furnace and Its Ingot Casting Process
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  • A Type 450 Ingot Casting Furnace and Its Ingot Casting Process

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Embodiment Construction

[0013] It includes a heat insulation cage 1, an upper furnace chamber 2, a lower furnace chamber 3 and a plate heat exchanger 4, and the top of the upper furnace chamber 2 is provided with

[0014] The heater on the top of the furnace body is provided with three graphite support columns 5 at the bottom of the lower furnace chamber. As shown in the accompanying drawings, the length of the three graphite support columns 5 is 685-689cm.

[0015] 2-4 boron nitride nuts are arranged at the four corners of the heater on the top of the furnace body.

[0016] Ingot casting process, including heating, melting, crystal growth, annealing, and cooling, the heating time is 6-7 hours, and the heating temperature is 1540°C; the melting time is 12-14 hours, and the melting temperature is 1430°C; crystal growth The time is 16-18 hours, and the crystal growth temperature is 1370°C; the annealing time is 5-6 hours, and the annealing temperature is 900°C; the cooling time is 12-14 hours, and the ...

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Abstract

A 450-type ingot casting furnace and its ingot casting process, including a heat insulation cage, an upper furnace chamber, a lower furnace chamber and a plate heat exchanger, the top of the upper furnace chamber is equipped with a furnace top heater, and the bottom of the lower furnace chamber is equipped with three Graphite support columns, the length of the three graphite support columns is 685-689cm. Its ingot casting process includes heating, melting, crystal growth, annealing, and cooling. The heating time is 6-7 hours, and the heating temperature is 1540°C; the melting time is 12-14 hours, and the melting temperature is 1430°C; The time is 16-18 hours, and the crystal growth temperature is 1370°C; the annealing time is 5-6 hours, and the annealing temperature is 900°C; the cooling time is 12-14 hours, and the cooling temperature is 400°C. Therefore, the problem of increasing the charging amount of the 450-type ingot furnace is solved. The utility model has the characteristics of simple structure and low cost. It is suitable for energy-saving transformation of 450-type ingot furnace.

Description

technical field [0001] The invention relates to a 450-type ingot furnace and its ingot-casting process, a polycrystalline silicon chip manufacturing process for solar silicon-based batteries, and in particular to a 450-type ingot casting process applied to the polycrystalline silicon chip manufacturing process for solar silicon-based batteries. The ingot furnace and its ingot production process whose charging capacity is increased from 450kg to 550kg. Background technique [0002] Polycrystalline silicon wafers are commonly used raw materials for the preparation of solar silicon-based cells. The polysilicon raw material is cast into a polysilicon ingot by an ingot casting furnace, and then cut into strips, and then sliced ​​to become a polysilicon wafer. Therefore, the ingot furnace is the basic equipment for the production of polycrystalline silicon ingots. At present, the commonly used GT450 polysilicon ingot furnace can only produce silicon ingots weighing 420-450Kg. Me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B28/06C30B29/06
Inventor 张泽兴吴彬辉
Owner JIANGXI SORNID HI TECH
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