Preparation method for ultra pure silicon material used in solar energy photovoltaic industry

A solar photovoltaic, industrial technology, applied in the manufacture of final products, chemical instruments and methods, silicon compounds, etc., can solve the problems of restricting the development of high-tech industries and technological upgrading, and achieve the effect of improving application value and simple process

Active Publication Date: 2011-10-26
JIANGSU SHENGDA QUARTZ PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no mass production of ultra-pure silicon materials used in the domestic solar photovoltaic industry. If it cannot catch up wit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Prepare ultrapure silicon material according to the following specific steps:

[0023] (1) Mineral processing: select quartz ore with a total content of aluminum, iron, calcium, magnesium, titanium, nickel, manganese, copper, lithium, sodium, potassium, and boron at 50ppm and a silica content of 99.95%; The mined mines are first observed directly with the naked eye, and then brought back for inspection, testing, testing, and re-inspection, and finally determine whether they can meet the requirements for use;

[0024] (2) Cleaning of quartz ore: Clean the selected quartz ore with water to remove useless soil and other mineral impurities as well as foreign objects during mining and transportation; the cleaning method is to flush the quartz ore with the tap, and the cleaning process Turn the quartz ore in the middle, easy to rinse;

[0025] (3) Primary selection: crush the cleaned quartz ore to obtain quartz blocks with a diameter of 5 cm, and remove mica, f...

Embodiment 2

[0038] Embodiment 2: prepare ultrapure silicon material according to the following specific steps:

[0039] (1) Mineral processing: select quartz ore with a total content of aluminum, iron, calcium, magnesium, titanium, nickel, manganese, copper, lithium, sodium, potassium, and boron at 50ppm and a silica content of 99.95%; The mined mines are first observed directly with the naked eye, and then brought back for inspection, testing, testing, and re-inspection, and finally determine whether they can meet the requirements for use;

[0040] (2) Cleaning of quartz ore: Clean the selected quartz ore with water to remove useless soil and other mineral impurities as well as foreign objects during mining and transportation; the cleaning method is to flush the quartz ore with the tap, and the cleaning process Turn the quartz ore in the middle, easy to rinse;

[0041] (3) Primary selection: crush the cleaned quartz ore to obtain quartz blocks with a diameter of 5 cm, and remove mica, fel...

Embodiment 3

[0054] Embodiment 3: prepare ultrapure silicon material according to the following specific steps:

[0055] (1) Mineral processing: select quartz ore with a total content of aluminum, iron, calcium, magnesium, titanium, nickel, manganese, copper, lithium, sodium, potassium, and boron at 50ppm and a silica content of 99.95%; The mined mines are first observed directly with the naked eye, and then brought back for inspection, testing, testing, and re-inspection, and finally determine whether they can meet the requirements for use;

[0056] (2) Cleaning of quartz ore: Clean the selected quartz ore with water to remove useless soil and other mineral impurities as well as foreign objects during mining and transportation; the cleaning method is to flush the quartz ore with the tap, and the cleaning process Turn the quartz ore in the middle, easy to rinse;

[0057] (3) Primary selection: crush the cleaned quartz ore to obtain quartz blocks with a diameter of 5 cm, and remove mica, f...

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PUM

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Abstract

The invention discloses a preparation method for an ultra pure silicon material used in solar energy photovoltaic industry. The method is characterized by comprising the steps of ore dressing, quartz ore cleaning, primary selection, first chemical treatment, secondary selection, first high temperature treatment, third selection, magnetic separation treatment, multielement chemical treatment, ultrasonic treatment, treatment with a flotation machine, high temperature chlorination treatment, centrifuge dewatering and drying, deshydroxy treatment and magnetic separation. The ultra pure silicon material prepared by the method provided in the invention can be used to fabricate solar energy photovoltaic products; therefore, developmental demands in domestic solar energy photovoltaic industry andother high and new technology industries are satisfied, and the passive situation that ultra pure silicon materials used in the solar energy photovoltaic industry are depended on import is changed.

Description

technical field [0001] The invention relates to a preparation method of an ultra-pure silicon material, in particular to a preparation method of an ultra-pure silicon material used in the solar photovoltaic industry. Background technique [0002] Ultra-pure silicon materials for solar photovoltaic industry are upstream materials in high-tech fields such as semiconductor electronics, optical fiber communications, special light sources, aerospace, and national defense. They support industries worth trillions of dollars. Ultra-pure silicon for solar photovoltaic products Materials have always been dependent on imports, which has severely restricted the rapid development and technological upgrading of my country's related high-tech industries. At present, the ultra-pure silicon materials used in the domestic solar photovoltaic industry have not yet been mass-produced. If they cannot catch up with the world's advanced level, it will inevitably restrict the further development and ...

Claims

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Application Information

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IPC IPC(8): C01B33/021H01L31/18
CPCY02P70/50
Inventor 段其九段玉伟谢大春
Owner JIANGSU SHENGDA QUARTZ PROD CO LTD
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