Apparatus for the production of molten iron

Patent metadata

Field	Value
Publication number	US-2022411888-A1
Application number	US-202017780461-A
Country	US
Kind code	A1
Filing date	Nov 27, 2020
Priority date	Nov 28, 2019
Publication date	Dec 29, 2022
Grant date	—

Abstract

Apparatus for the production of molten iron including a metallurgical vessel, having a surrounding wall, a cyclone part provided on top of a smelt reduction part, the cyclone part being in open connection with the smelt reduction part and having at least one supply apparatus around the circumference of the surrounding wall adjusted to introduce oxygen gas into the cyclone part, wherein the at least one supply apparatus is further adjusted to introduce a mixture of oxygen gas and a combustible gas.

First claim

1 . An apparatus for the production of molten iron comprising a metallurgical vessel having a surrounding wall, a cyclone part provided on top of a smelt reduction part, the cyclone part being in open connection with the smelt reduction part and having at least one supply means around the circumference of the surrounding wall adjusted to introduce oxygen gas into the cyclone part, characterised in that the at least one supply means is further adjusted to introduce a mixture of oxygen gas and a combustible gas.

2 . The apparatus for the production of molten iron according to claim 1 , wherein the combustible gas is selected from the group of coke oven gas, converter gas, natural gas, hydrogen gas and liquefied petroleum gas.

3 . The apparatus for the production of molten iron according to claim 2 , wherein the combustible gas contains less than 20% nitrogen gas.

4 . The apparatus for the production of molten iron according to claim 1 , wherein the supply means are located at the top of the smelt reduction part.

5 . The apparatus for the production of molten iron according to claim 1 , wherein the supply means are symmetrically distributed over the circumference of the surrounding wall of the cyclone part.

6 . The apparatus for the production of molten iron according to claim 1 , wherein the supply means are symmetrically distributed over the circumference of the surrounding wall at the top of the smelt reduction part.

7 . The apparatus for the production of molten iron according to claim 1 , wherein the supply means are adjusted to mix the oxygen gas and the combustible gas before entering the cyclone part.

8 . The apparatus for the production of molten iron according to claim 1 , wherein the supply means are configured such that a group of oxygen gas outlets is surrounded by one or more combustible gas outlets.

9 . The apparatus for the production of molten iron according to claim 1 , wherein the supply means are configured such that a group of combustible gas outlets is surrounded by one or more oxygen gas outlets.

10 . A method of producing molten iron by means of a metallurgical vessel having a surrounding wall, a cyclone part provided on top of a smelt reduction part, the cyclone part being in open connection with the smelt reduction part and having at least one supply means around the circumference of the surrounding wall introducing oxygen gas into the cyclone part, wherein a mixture of oxygen gas and a combustible gas is introduced by means of the at least one supply means.

11 . The method of producing molten iron according to claim 10 , wherein the combustible gas is selected from the group of coke oven gas, converter gas, natural gas, hydrogen gas and liquefied petroleum gas.

12 . The method of producing molten iron according to claim 11 , wherein the combustible gas contains less than 20% nitrogen gas.

13 . The method of producing molten iron according to claim 10 , wherein the supply means are symmetrically distributed over the circumference of the surrounding wall of the cyclone part.

14 . The method of producing molten iron according to claim 10 , wherein the supply means are symmetrically distributed over the circumference of the surrounding wall at the top of the smelt reduction part.

15 . The method of producing molten iron according to claim 10 , wherein the oxygen gas and the combustible gas are mixed by the supply means before entering the cyclone part.

Assignees

• Tata Steel Ijmuiden Bv

Inventors

• Meijer Hendrikus Koenraad Albertus
• Broersen Petrus Gerardus Jacobus

Classifications

• C21B13/0026 Primary

  introduction of iron oxide in the flame of a burner or a hot gas stream · CPC title

• C21C2250/04

  Liquid gas · CPC title

• C21B11/08 Primary

  in hearth-type furnaces · CPC title

• C21B7/007

  Controlling or regulating of the top pressure · CPC title

• C21C2250/02

  Hot oxygen · CPC title