Patent · US Active

Method of operating regenerative heaters in blast furnace plant

US8992823B2 · kind B2 · utility

1Cited by

0References

11Claims

0Family size

Assignees

Paul Wurth S.A. · LU
Paul Wurth Refractory & Engineering GmbH · DE

Inventors

Friedrich Eschmann · Ginsheim-Gustavsburg, DE
Ralf Allmannsdörfer · Mainz, DE
Johannes Münzer · Schlangenbad, DE
Sylvia Heilhecker · Nauheim, DE
Jean-Paul Simoes · Luxembourg, LU

Key dates

Filing date	Aug 13, 2012
Grant date	Mar 31, 2015
Priority date	—
Expiry date	Aug 13, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/25
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

In a blast furnace plant, at least three regenerative heaters are cyclically operated on blast and on gas: while a regenerative heater is operated on gas, hot flue gas is produced and caused to flow through the regenerative heater so as to heat the heat storage elements; and while a regenerative heater is operated on blast, process gas, i.e. a CO-rich fraction of the top gas, is blown through the regenerative heater so that the process gas takes up heat from the heat storage elements, such that during a changeover of a regenerative heater from on-blast to on-gas operation, the regenerative heater is purged from process gas using flue gas collected after having flown through at least one of the regenerative heaters.

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