Patent · US Expired

Method of making ferroboron and ferroborosilicon alloys and the alloys made by this method

US4569691A · kind A · utility

3Cited by

1References

12Claims

0Family size

Assignee

GfE Gesellschaft fur Elektrometallurgie mbH · DE

Inventors

Rudolf Fichte · Nuremberg, DE
Friedrich Breuer · Eschweiler, DE
Reinhard Hahn · Vilsheim, DE
Hans-Joachim Retelsdorf · Zirndorf, DE

Key dates

Filing date	Mar 12, 1985
Grant date	Feb 11, 1986
Priority date	—
Expiry date	Mar 12, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C35/005
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of making ferroboron or ferroborosilicon alloys in a low-shaft electrical furnace wherein the burden or charge has at least as a major portion of its carbon carrier, wood chips or particles which are carbonized to wood charcoal during the process and thus the charge has a porosity which permits adsorption action to prevent loss of volatile boron compounds. The charge also contains iron oxide and boron oxide, the electrodes of the furnace effecting a reduction of the boron oxide at a reduction zone just above the floor of the furnace.

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