Lance and operation method using the same

Patent metadata

Field	Value
Publication number	US-9863014-B2
Application number	US-201314653376-A
Country	US
Kind code	B2
Filing date	Dec 16, 2013
Priority date	Dec 18, 2012
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

Provided is a lance and an operation method using the same, in which a suction hole allowing source gas to be injected into a container, in which a reaction gas is generated, is included. The suction hole is formed in a source gas passage where the reaction gas is introduced into the passage. Thus the temperature of the gas injected into the container may be easily increased without using any separate heating device, and secondary combustion efficiency may be increased. In addition, the gas sprayed at a high temperature is provided, and thus additional heat may be supplied into the container. Thus, excessive use of fuel used to increase the temperature of the container may be avoided, and thus operation costs may be reduced and operation efficiency and productivity may be increased.

First claim

What is claimed is:

1. A lance for blowing a source gas into a container in which a reaction gas is generated, the lance comprising:
a wall body forming a vertical gas passage inside thereof, a source gas being capable of flowing downwards through the vertical gas passage;
a gas storage part formed in an upper portion of the vertical gas passage of the wall body, wherein the gas storage part accommodates the source gas;
a mixing part formed under the gas storage part, the mixing part having a predetermined vertical length, wherein the source gas accommodated in the gas storage part is discharged into the mixing part;
a suction hole formed to penetrate the wall body toward the mixing part at a position between the gas storage part and the mixing part, the suction hole being inclined towards the mixing part in such a way that a first reaction gas is suctioned into the mixing part from outside the vertical gas passage and reacted with the source gas discharged from the gas storage part to form a second reaction gas; and
a discharge part formed under the gas mixing part, the discharge part having a predetermined vertical length, wherein the second reaction gas is discharged through the discharge part, wherein the mixing part is gradually narrowed toward the discharge part.

2. The lance of claim 1 , wherein the storage part is gradually narrowed toward the mixing part.

3. The lance of claim 1 , wherein the storage part includes a discharge hole at an end of the storage part, wherein the source gas temporarily accommodated in the gas storage part is discharged through the discharge hole into the mixing part.

4. The lance of claim 3 , wherein
the discharge hole is gradually broadened toward the mixing part.

5. The lance of claim 1 , wherein the discharge part is gradually broadened in a downward direction.

Assignees

• Posco

Inventors

• Ha Chang Su
• Choi Hyeon Soo

Classifications

• C21C2100/02

  Treatment of the exhaust gas · CPC title

• F27D3/16

  Introducing a fluid jet or current into the charge (F27D3/18 takes precedence) · CPC title

• F27D2003/169

  Construction of the lance, e.g. lances for injecting particles · CPC title

• F27D2003/163

  the fluid being an oxidant · CPC title

• C21C7/072

  Treatment with gases (C21C7/06, C21C7/064, C21C7/068 take precedence) · CPC title