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Silica core connecting method

A connection method and silicon core technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of unusable, waste, and unreachable length, and achieve the effect of improving cutting yield and reducing waste

Active Publication Date: 2016-02-17
YELLOW RIVER PHOTOVOLTAIC IND TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of using raw polycrystalline silicon rods to cut silicon cores, due to the influence of stress, tools, fixtures and other factors, some silicon cores are broken, and the length does not meet the requirements for loading in the reduction furnace, so it cannot be used
At present, silicon cores broken due to cutting are usually recycled as waste materials, but the production cost of silicon cores is relatively high, and if discarded, it will cause a lot of waste

Method used

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  • Silica core connecting method

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Embodiment Construction

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, the embodiments are provided to explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to particular intended uses. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements.

[0018] It will be understood that, although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another...

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Abstract

The invention discloses a silica core connecting method which is used for connecting and recovering a first fracture silica core and a second fracture silica core. The silica core connecting method comprises a step A of heating the first fractured end of the first fracture silica core and the second fractured end of the second fracture silica core to 1100-1250 DEG C; a step B of causing the first fractured end to be in contact with the second fractured end, continuing heating the first fractured end and the second fractured end to 1300-1350 DEG C, and causing the first fractured end to be in fusion connection with the second fractured end; a step C of cooling the first fractured end and the second fractured end which are in fusion connection, and connecting and recovering the first fracture silica core and the second fracture silica core. According to the silica core connecting method, the fractured silica cores can meet the required length after being connected and recovered and can react in a reduction furnace to generate polycrystalline silicon, the production requirements are met, the silica core waste is reduced greatly, and the cutting yield is improved.

Description

technical field [0001] The invention belongs to the technical field of polysilicon preparation, and in particular relates to a method for connecting silicon cores. Background technique [0002] At present, the production method of polysilicon mainly adopts the Siemens method, which mainly produces polysilicon by reducing the silicon core in a reduction furnace. The principle is: the silicon core reduction reaction is carried out in a closed reduction furnace. Before the furnace is installed, the silicon cores are lapped into several closed loops in the reduction furnace. Each closed loop consists of two vertical silicon cores and a Root horizontal silicon core composition. The two vertical silicon cores of each closed circuit are respectively connected to two electrodes on the bottom of the furnace, and the electrodes are respectively connected to the positive and negative poles of the DC power supply, and then the silicon cores are heated. During heating, a group of lapped...

Claims

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Application Information

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IPC IPC(8): C01B33/035
CPCC01B33/035
Inventor 李春松吴良杨紫琪高亚丽王素贤
Owner YELLOW RIVER PHOTOVOLTAIC IND TECH CO LTD
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