A method for combined melting and refining to purify industrial silicon
A technology for refining, purifying, and industrial silicon, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of low efficiency, unstable products, and high energy consumption, reducing energy consumption, reducing entrainment, and improving purification efficiency. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0023] 10kg of industrial silicon blocks (brand 1101, produced in Hunan) were crushed and ground into particles with a particle size of less than 500 microns, and sieved to obtain silicon powder with a particle size of 150-500 microns. Get 100g silicon powder and wash, dry, obtain pretreatment silicon powder. Mix the pretreated silicon powder with metallic tin (purity 99.99%), heat to 1300°C to completely melt, and cool to room temperature at 3°C / min. The silicon crystals are separated by centrifugation, and the silicon crystals are made into particles with a particle size of less than 500 microns. They are pickled with 5wt% hydrofluoric acid at 70°C for 6 hours, and the reaction solid-to-liquid ratio is 1:10. After pickling, the silicon powder is rinsed and dried. Then pickle with 20wt% aqua regia at 70°C for 6 hours, the reaction solid-to-liquid ratio is 1:10, rinse and dry the silicon powder after pickling. The obtained silicon powder is mixed with metallic aluminum (purit...
Embodiment 2
[0028] 10kg of industrial silicon blocks (brand 1101, produced in Hunan) were crushed and ground into particles with a particle size of less than 500 microns, and sieved to obtain silicon powder with a particle size of 150-500 microns. Take 100g of silicon powder, wash with water, and dry to obtain pretreated silicon powder. The pretreated silicon powder was mixed with the centrifuged waste tin in Example 1, heated to 1300°C to completely melt, and cooled to room temperature at 3°C / min. The silicon crystals are separated by centrifugation, and the silicon crystals are made into particles with a particle size of less than 500 microns. They are pickled with 5wt% hydrofluoric acid at 70°C for 6 hours, and the reaction solid-to-liquid ratio is 1:10. After pickling, the silicon powder is rinsed and dried. Then pickle with 20wt% aqua regia at 70°C for 6 hours, the reaction solid-to-liquid ratio is 1:10, rinse and dry the silicon powder after pickling. The obtained silicon powder wa...
Embodiment 3
[0033] 10kg of industrial silicon blocks (brand 1101, produced in Yunnan) were crushed and ground into particles with a particle size of less than 500 microns, and sieved to obtain silicon powder with a particle size of 150-500 microns. Take 100g of silicon powder, wash with water, and dry to obtain pretreated silicon powder. Mix the pretreated silicon powder with metal tin (purity 99.9%), heat to 1250°C to completely melt, and cool to room temperature at 3°C / min. The silicon crystals are separated by centrifugation, and the silicon crystals are made into particles with a particle size of less than 500 microns. They are pickled with 5wt% hydrofluoric acid at 70°C for 6 hours, and the reaction solid-to-liquid ratio is 1:20. After pickling, the silicon powder is rinsed and dried. Then pickle with 20wt% aqua regia at 70°C for 6 hours, the reaction solid-to-liquid ratio is 1:20, rinse and dry the silicon powder after pickling. The obtained silicon powder was mixed with metallic a...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More