Patent · US Expired

Method and apparatus for the reduction of ores, especially iron ores

US4001008A · kind A · utility

6Cited by

3References

5Claims

0Family size

Assignee

Vereinigte Osterreichische Eisen- und Stahlwerke - Alpine Montan Aktiengesellschaft · AT

Inventor

Kurt Stift · Leoben, AT

Key dates

Filing date	Oct 1, 1975
Grant date	Jan 4, 1977
Priority date	—
Expiry date	Oct 1, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC21B13/06
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of reducing iron ores in a shaft furnace. The furnace has an enlarged lower portion which is joined to an upper portion by an intermediate portion of reduced cross-sectional area. Iron ores are introduced in the upper portion of the furnace without addition of fuel (such as coke), and hot reducing gases are produced outside the furnace through partial combustion. The hot reducing gases and carbon in powder form are introduced into the lower portion of the furnace in a generally downward direction toward the iron bath in the lower portion of the furnace, and heat produced by electric energy is supplied to the furnace lower portion. Exceptionally accurate control is provided of the amount of carbon to the iron ore is very rapid.

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