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Polycrystalline silicon furnace

A polysilicon and silicon furnace technology, applied in the field of energy-saving polysilicon furnaces and polysilicon ingot furnaces, can solve the problems of high energy consumption of polysilicon, achieve long service life, good energy-saving effect, and stable performance

Inactive Publication Date: 2012-10-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polysilicon furnace of the above invention generally has the disadvantage of high energy consumption for preparing polysilicon

Method used

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Effect test

Embodiment 1

[0020] An energy-saving polysilicon furnace, see figure 1 , consisting of heat-resistant steel 1, potassium hexatitanate whisker insulation brick 2, heating device 3, Al 2 o 3 It is composed of refractory brick 4, crucible 8 and low carbon steel plate 9, etc. The shell of the polysilicon furnace is a Q235 low-carbon steel plate 9 with a thickness of 12mm, and a potassium hexatitanate whisker heat insulation brick 2 is added in the shell. % of silica sol (silica sol grade GRJ-26, see Ministry of Aerospace Standard HB5346-1986) mixed to make heat insulation bricks, and baked at 750 ° C for 3 hours. Add Al with a thickness of 35mm inside the insulation brick 2 2 o 3 refractory brick 4, and place the crucible 8 in the polysilicon furnace, place the heating device 3 (composed of 7 independent heaters) outside the crucible 8, and set a retrieving cover above the polysilicon furnace, the retrieving cover is The potassium hexatitanate whisker insulation brick 2 is embedded in the...

Embodiment 2

[0022] An energy-saving polysilicon furnace that will figure 1 , made of heat-resistant steel, potassium hexatitanate whisker insulation brick, heater, Al 2 o 3 Composed of refractory bricks, crucibles and low carbon steel plates. The shell of the polysilicon furnace is Q235 low-carbon steel plate 9 with a thickness of 15mm, and the potassium hexatitanate whisker heat insulation brick 2 is added in the shell. % of silica sol (silica sol grade GRJ-30, see Ministry of Aerospace Standard HB5346-1986) mixed to make heat insulation bricks, and baked at 800 ° C for 2 hours. Add Al with a thickness of 50mm inside the insulation brick 2 2 o 3 refractory brick 4, and place the crucible 8 in the polysilicon furnace, place the heating device 3 (composed of 8 independent heaters) outside the crucible 8, and set a retrieving cover above the polysilicon furnace, the retrieving cover is The potassium hexatitanate whisker insulation brick 2 is embedded in the heat-resistant steel 1, and ...

Embodiment 3

[0024] An energy-saving polysilicon furnace that will figure 1 Made of heat-resistant steel, potassium hexatitanate whisker insulation brick, heater, Al 2 o 3 Composed of refractory bricks, crucibles and low carbon steel plates. The shell of the polysilicon furnace is Q235 low-carbon steel plate 9 with a thickness of 14mm, and potassium hexatitanate whisker heat insulation brick 2 is added in the shell. % of silica sol (silica sol grade GRJ-26, see Ministry of Aerospace Standard HB5346-1986) mixed to make heat insulation bricks, and baked at 750 ° C for 3 hours. Add Al with a thickness of 40mm inside the insulation brick 2 2 o 3 refractory brick 4, and place the crucible 8 in the polysilicon furnace, place the heating device 3 (composed of 6 independent heaters) outside the crucible 8, and set a retrieving cover above the polysilicon furnace, the retrieving cover is The potassium hexatitanate whisker insulation brick 2 is embedded in the heat-resistant steel 1, and the he...

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Abstract

The invention discloses a polycrystalline silicon furnace and belongs to the technical field of polycrystalline silicon furnaces. The polycrystalline silicon furnace consists of heat resistant steel, potassium hexatitanate whiskers insulating bricks, heating devices, AL2O3 fireproofing tiles, a crucible and a steel plate, wherein the shell of a furnace body of the polycrystalline silicon furnace adopts the steel plate, the inner layers of the steel plates are pasted with the potassium hexatitanate whiskers insulating bricks, the inner layers of the insulating bricks are provided with the AL2O3 fireproofing tiles, the crucible is arranged in a cavity formed by the AL2O3 fireproofing tiles, the heating devices are arranged in paces between the crucible and fireproofing tile layers, a material taking cover is also arranged above the polycrystalline silicon furnace, is used for embedding the potassium hexatitanate whiskers insulating bricks in the heat resistant steel, and then is directly covered on the furnace body of the energy-saving polycrystalline silicon furnace. The polycrystalline silicon furnace has good energy-saving effect.

Description

technical field [0001] The invention relates to a polysilicon ingot furnace for producing polysilicon, in particular to an energy-saving polysilicon furnace and belongs to the technical field of polysilicon adding furnaces. Background technique [0002] Solar energy is an important, effective, renewable and clean energy, with huge reserves, inexhaustible, inexhaustible, no environmental pollution, full of attractive prospects. Solar photovoltaic power generation, with its advantages of mature technology, convenient application, absolute safety, long life and maintenance-free, has become the most important way to utilize solar energy, and it is also one of the most promising clean energy sources for large-scale application in the 21st century. Polysilicon, as a material capable of generating electricity from solar energy, is increasingly being used in the era of renewable energy shortages. The preparation process of polysilicon is the purification process of silicon raw mate...

Claims

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Application Information

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IPC IPC(8): C30B29/06C30B28/06C22C38/54
Inventor 符寒光蒋志强冯锡兰刘建伟魏永强
Owner BEIJING UNIV OF TECH
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