Silicon refining process

Details Silicon refining process Silicon refining process

1996-09-10

1998-10-13

Straub, Gary P.

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

423DIG5, C01B 3302

Patent

active

058208429

ABSTRACT:
The process calculates the amount of silica and oxidizing agent to use in a refining process for metallurgical-grade silicon. The calculation for silica takes into account (1) the aluminum content of the previous batch of refined silicon; (2) the calcium content of the previous batch of refined silicon; (3) the trend in the aluminum content of the unrefined silicon; and (4) the age of the ladle used for refining. The process then calculates the amount of silica based on a predetermined minimum amount of silica to add, a predetermined maximum amount of silica to add and the amount of silica added to the previous batch of refined silicon. The calculation for oxidizing agent is based on (1) the aluminum content of the previous batch of refilled silicon; (2) the calcium content of the previous batch of refined silicon; and (3) the age of the ladle. The process then calculates the amount of oxidizing agent to add based on a maximum amount of oxidizing agent to add and the amount of oxiziding agent added to the the previous batch of refined silicon. By following this process, an increase in the amount of chemical-grade silicon is obtained.

REFERENCES:
patent: 1037713 (1912-09-01), Allen
patent: 4249988 (1981-02-01), Lavigna et al.
patent: 5021221 (1991-06-01), Gould et al.
patent: 5244639 (1993-09-01), Aratani et al.
Tuset, Johan. "Fundamental principles and data of relevans to the oxidative process," Nov. 13, 1994 Silicon & Ferrosilicon Refining Seminar Opryland Hotel, Nashville, TN U.S.A. Iron and Steel Society, Inc.
Tuset, Johan, "Carbon Refined Silicon", Nov. 13, 1994 Silicon & Ferrosilicon Refining Seminar Iron and Steel Society, Inc. Opryland Hotel, Nashville Tennesse USA.
Tuset, Johan. "Material and Heat Balance", Nov. 13, 1994 Silicon and Ferrosilicon Refining Seminar Iron and Steel Society, Inc. Opryland Hotel Nashville Tennessee USA.
Dosaj, Vishu. "Refining Program Lecture Notes", Nov. 13, 1994 Silicon and Ferrosilicon Refining Seminar Iron and Steel Society, Inc. Opryland Hotel, Nashville Tennesse USA.
Holta, Halvor. "Why the need for refining?", Nov. 13, 1994 Silicon and Ferrosilicon Refining Seminar Iron and Steel Society, Inc. Opryland Hotel, Nashville Tennessee USA.
Ritzer, Alan and Tabit, George E. "Strategic Alliance: Silicon Metal for Silicone Manufacturing", Jun. 1992 Conference on Silicon for Chemical Industry Geiranger, Norway.
"Expert System Boosts Process Output 15 Percent", PI Quality Jan./Feb. 1993, p. 34 by Ritzer et al.
Tuset, J. Kr. "Principles of Silicon Refining", Aug. 1985 International Seminar on Refining and Alloying of Liquid Aluminum and Ferro-Alloys, Trondheim Norway.
Tuset, J.Kr.; Ottem, L.; Livik, R. "Principles of Silicon Refining", Jun. 1992 Silicon for Chemical Industry, Edited by .O slashed.ye and Rong Institute of Inorganic Chemistry 7034 Trondheim Norway.
Haaland, D.; Lindstad, L.H.; Tuset, J.Kr. "Use of Alkali Oxide Slags in Silicon Refining", Jun. 1994.

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