Patent · US Expired

Process for treating silicon and ferrosilicon with slag

US4534791A · kind A · utility

6Cited by

3References

1Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Anton More · Burghausen, DE
Winfried Lang · Burghausen, DE
Rudolf Riedle · Burghausen, DE
Herbert Straussberger · Mehring, DE
Willi Streckel · Schweich, DE

Key dates

Filing date	Jul 30, 1984
Grant date	Aug 13, 1985
Priority date	—
Expiry date	Jul 30, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/20
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a process for treating elemental silicon and ferrosilicon with slag having the following analytical composition: ______________________________________ K.sub.2 O from 2 to 13% by weight Na.sub.2 O from 0 to 2% by weight .SIGMA. K.sub.2 O + Na.sub.2 O from 2 to 13% by weight SiO.sub.2 from 45 to 72% by weight Al.sub.2 O.sub.3 from 0 to 30% by weight .SIGMA. SiO.sub.2 + Al.sub.2 O.sub.3 from 60 to 78% by weight CaO from 0 to 30% by weight MgO from 0 to 30% by weight .SIGMA. CaO + MgO from 15 to 30% by weight CaF.sub.2 from 0 to 10% by weight MgF.sub.2 from 0 to 10% by weight .SIGMA. CaF.sub.2 + MgF.sub.2 from 0 to 10% by weight .SIGMA. CaO + MgO + CaF.sub.2 + MgF.sub.2 from 15 to 30 % by weight ______________________________________ and impurities resulting from the raw materials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.