Patent · US Active

Method and device for producing pig iron

US9428818B2 · kind B2 · utility

1Cited by

11References

11Claims

0Family size

Assignee

Primetals Technologies Austria GmbH · AT

Inventors

Hado Heckmann · Linz, AT
Robert Millner · Loosdorf, AT
Gerald Rosenfellner · Griffen, AT

Key dates

Filing date	Sep 10, 2012
Grant date	Aug 30, 2016
Priority date	—
Expiry date	Mar 1, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/122
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for reducing material containing iron oxide in a solid bed in a reduction shaft and converting the material to pre-reduced material in the reduction shaft by introducing pre-reduction gas into the solid bed at a pressure p1. Pre-reduced material is introduced from the reduction shaft into a melter gasifier and there finally reduced by reduction gas under a pressure p2. A top gas at pressure p3 is diverted from above the solid bed out of the reduction shaft. A dust exhaust gas having a pressure p4 is diverted from the solid bed out of the reduction shaft. The relationships p1>p4 and p1>p3, and preferably also p4>p3, apply. A device carries out such a method.

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