Ladle bottom and ladle

Patent metadata

Field	Value
Publication number	US-9849508-B2
Application number	US-201414769712-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Apr 26, 2013
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A ladle bottom being part of a metallurgical ladle for treating a metal melt as well as a corresponding metallurgical ladle.

First claim

The invention claimed is:

1. Ladle bottom made of a refractory ceramic body with an upper surface, a lower surface and a pouring channel extending between upper surface and lower surface, wherein said pouring channel extends from a diffusor box, being defined by a deepened section of said upper surface, wherein the diffusor box is characterized by the following features:
a) it is arranged at a horizontal distance to a surface area of the ladle bottom used as an impact area for a metal melt poured onto said ladle bottom,
b) it has a vertical step at least along its border facing the impact area, wherein said step has a height of between 40 and 200 mm,
c) it has a minimum horizontal area

A

m
⁢

⁢
i
⁢

⁢
n

=

Π
4

⁢

(

0.37
⁢
r

)

2

+
0.3

and a maximum horizontal area

A
max

=

Π
4

⁢

(

0.08
⁢
r

)

2

+
0.3

wherein r=radius of the ladle bottom and r≧0.75 m with r max =2 m for all ladle bottoms with an effective radius of ≧2 m,
d) an inlet end of said pouring channel is arranged offset the step along its border facing the impact area.

2. Ladle bottom according to claim 1 , wherein the step extends along at least 75% of the border of the diffusor box.

3. Ladle bottom according to claim 1 , wherein the step extends along the complete border of the diffusor box.

4. Ladle bottom according of claim 1 , wherein the border defining the outer geometry of the diffusor box has a rectangular, circular or oval shape.

5. Ladle bottom according to claim 1 wherein the horizontal area of the diffusor box corresponds to 3.7 to 32.9% of the total surface area of the ladle bottom.

6. Ladle bottom according to claim 5 wherein the horizontal area of the diffusor box is equal or larger than 5.8% of the total surface area of the ladle bottom.

7. Ladle bottom according to claim 5 wherein the horizontal area of the diffusor box is equal or smaller than 25.5% of the total surface area of the ladle bottom.

8. Ladle bottom according to claim 1 wherein the pouring channel is arranged at a distance to the step along its border facing the impact area being equal or larger 3 times its maximum horizontal extension.

9. Ladle bottom according to claim 1 with a distance between a central point along the upper surface of the impact area and a central point along the upper surface of the diffusor box being 30 to 75% of the maximum horizontal extension of the ladle bottom.

10. Ladle bottom according to claim 1 with a distance between a central point along the upper surface of the impact area and a central point along the upper surface of the diffusor box being 50 to 65% of the maximum horizontal extension of the ladle bottom.

11. Ladle bottom according to claim 1 with a distance between a central longitudinal axis of a gas purging plug arranged in the ladle bottom and a central point along the upper surface of the diffusor box being 30 to 75% of the maximum horizontal extension of the ladle bottom.

12. Ladle bottom according to claim 1 with a distance between a central longitudinal axis of a gas purging plug arranged in the ladle bottom and a central point along the upper surface of the diffusor box being 50 to 65% of the maximum horizontal extension of the ladle bottom.

13. Ladle bottom according to claim 1 with a dam like protrusion between impact area and diffusor box, extending substantially perpendicular to a direction along which a corresponding metal melt will flow from the impact area into the diffusor box after hitting the impact area.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Kohler Sarah
• Maranitsch Alexander
• Servos Kerry

Classifications

• B22D41/08 Primary

  for bottom pouring (B22D41/14, B22D41/50 take precedence) · CPC title

• F27B14/08

  Details specially adapted for crucible or pot furnaces · CPC title

• F27D3/1518

  Tapholes · CPC title

• F27D1/0043

  Floors, hearths · CPC title

• F27D1/0006

  Linings or walls formed from bricks or layers with a particular composition or specific characteristics · CPC title