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A kind of preparation method of silicon core masterbatch

A technology of silicon core and masterbatch, which is applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of high cost and complicated process of reduction furnace improvement, and achieve the goals of shortening production cycle, increasing unit yield, and optimizing production process Effect

Active Publication Date: 2016-06-22
SICHUAN YONGXIANG POLY SILICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method of improving the reduction furnace to reduce energy consumption, the process is complicated and the cost of reduction furnace improvement is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing a silicon core masterbatch, comprising feeding trichlorosilane gas and hydrogen gas into a reduction furnace to react to prepare a polycrystalline silicon rod product material, and then selecting a polycrystalline silicon rod product material with a diameter of 110-130mm polysilicon rods meeting the requirements of silicon core masterbatch (it can be a whole piece or short sections), cut into the length required for drawing silicon cores, and get silicon core masterbatch after cleaning.

Embodiment 2

[0025] A method for preparing a silicon core masterbatch, comprising feeding trichlorosilane gas and hydrogen gas into a reduction furnace to react to prepare a polysilicon rod product material, the specific process is as follows, in the reduction furnace, the silicon core current Added to 140A, after 30 minutes of hydrogen air burning, the purified trichlorosilane gas and hydrogen were introduced into the reduction furnace, and at the same time, the current was applied to the silicon core for reaction. The reaction time was 80 hours, wherein: in the 0-10 hour reaction stage: The flow rates of trichlorosilane gas and hydrogen are increased uniformly from 0kg / h to 140kg / h and 340-kg / h respectively, and the silicon core current is evenly increased from 140A to 440A; 10-20h reaction stage: trichlorosilane gas Uniformly increased from 140kg / h to 240kg / h, hydrogen uniformly increased from 340kg / h to 490kg / h, silicon core current uniformly increased from 440A to 740A; 20-80h reaction...

Embodiment 3

[0028]A method for preparing a silicon core masterbatch, comprising feeding trichlorosilane gas and hydrogen gas into a reduction furnace to react to prepare a polycrystalline silicon rod product material, the preparation process of the polycrystalline silicon product material is as follows: in the reduction furnace, the silicon core is pressed Immediately after the success, the current of the silicon core is increased to 145A, and the hydrogen gas is fired for 45 minutes. The purified trichlorosilane gas and hydrogen gas are introduced into the reduction furnace, and the current is applied to the silicon core to react. -10h reaction stage: increase the flow rate of trichlorosilane gas and hydrogen from 0kg / h to 150kg / h and 350kg / h respectively, and the silicon core current from 145A to 450A; 10-20h reaction stage: three Chlorosilane gas is uniformly increased from 150kg / h to 250kg / h, hydrogen gas is uniformly increased from 350kg / h to 500kg / h, silicon core current is uniformly...

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Abstract

The invention provides a method for preparing a silicon core masterbatch, which comprises feeding trichlorosilane gas and hydrogen gas into a reduction furnace to react to prepare polycrystalline silicon rod product materials, and then selecting polycrystalline silicon rod product materials with a diameter of 110-130mm from the polycrystalline silicon rod product materials. The polycrystalline silicon rod required by the silicon core masterbatch is cut into the length required for drawing the silicon core, and the silicon core masterbatch is obtained after cleaning. The use of the invention to produce the silicon core masterbatch can reduce the amount of hydrogen used for reduction, and can effectively reduce the energy consumption for producing the silicon core masterbatch, thereby reducing the production cost.

Description

technical field [0001] The invention relates to the technical field of polysilicon production, in particular to a method for preparing a silicon core masterbatch. Background technique [0002] Among the production methods of polysilicon, the polysilicon production method (also known as the Siemens method) invented by German Siemens in 1954 is currently widely used: high-purity trichlorosilane gas and high-purity hydrogen are mixed together according to a certain ratio The raw material mixed gas is passed into the reduction reactor, and is continuously deposited on the heated high-purity silicon core, so that the diameter of the silicon core becomes thicker gradually to form polycrystalline silicon rods. There are two main production processes of the silicon core used here, one is the silicon core drawn by the silicon core furnace, and the other is the cut square silicon core. After improvement, the silicon core drawn by the silicon core furnace is drawn from the previous sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/035
Inventor 李川冯德志余昭辉甘居富李斌
Owner SICHUAN YONGXIANG POLY SILICON
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