Method and apparatus for injecting liquid oxygen

US5522916A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Pierre Karinthi · Vélizy-Villacoublay, FR
• Marc Buffenoir · Voisins-le-Bretonneux, FR
• Eric Streicher · Viroflay, FR

Key dates

• Filing date: Oct 31, 1994
• Grant date: Jun 4, 1996
• Expiry date: Oct 31, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27B1/16
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A high-speed jet of liquid oxygen (21) with a speed higher than 100 meters per second is delivered into the tuyeres of a blast furnace of cupola furnace together with pulverised carbon. The jet reaches the opposite wall of the cavity (9) formed at the outlet of the tuyere (6) in the mass of material contained in the shaft. Supplying oxygen to the bottom of the cavity improves the burning of the remaining coal, whereby higher injection levels may be achieved. The shape of the cavity may also be altered, and, in particular, faster reactions may be achieved in the axial region of the shaft.