TWI407069B - Slag door for metallurgical furnaces - Google Patents

Abstract

The invention relates to a slag door for metallurgic furnaces, wherein a slag door opening is provided in the upper receptacle of the furnace with a door tunnel having a sill plate and the slag door can be actuated by a closure mechanism. The closure mechanism is disposed outside the furnace wall and in front thereof, and the clear cross section of the slag door opening can be closed by means of at least two horizontally pivotable door leaves.

Description

Metallurgical furnace slag door

The invention is directed to a slag door of a metallurgical furnace, wherein a slag door opening in an upper vessel of the metallurgical furnace is provided with a door tunnel having a sill, and the slag door can be caused by a closing mechanism move.

WO 2007/147248 discloses a slag door formed from three parts. The upper door portion or door leaf is formed by a flap that is rotatable about a horizontal axis, and below the upper door leaf, two finger-shaped door leaves are provided that are rotatable about an upright axis.

Both the rotating mechanism of the rotating plate and the adjusting or closing mechanism of the lower door leaf are disposed in the furnace wall of the furnace vessel.

It is an object of the present invention to provide a slag door which is less complex in construction and which, in particular, allows the slag door to be subsequently installed in an existing metallurgical furnace without large-scale transformation.

The above object is achieved according to the invention by a slag door of a metallurgical furnace, wherein a slag door opening of the container above the metallurgical furnace is provided with a door passage having a door sill, and the slag door can be actuated by a closing mechanism, The feature is that the closing mechanism is disposed outside the furnace wall of the metallurgical furnace and in front of the furnace wall, and the clear cross-sectional area of the slag door opening can be closed by at least two horizontally rotatable door leaves, wherein the door leaf can be Locked in at least three positions, including a first position in which the door leaf is substantially in a common plane; a second position that is perpendicular to the common plane and presents an open position; and a third position in which the door leaf forms a direction facing the interior of the metallurgical furnace An acute angle and an opening gap is released between the door leaves.

The appendix of the scope of the patent application shows a preferred embodiment in which four door leaves are provided, and these door fans are arranged in pairs so that one pair is above the other pair, and wherein the door leaves can be actuated independently of each other.

The door leaf can also preferably be locked to a position where the door leaf opens outward at an acute angle such that controlled slag discharge can be performed via a gap formed between the edges of the door leaf.

The invention will be described below with reference to the drawings.

In the schematic diagram of the drawings, the wall of the metallurgical furnace indicated by 1 is only a suggested property.

The door opening 2 is provided to the furnace wall 1. The schematically indicated frame 3 is shown in front of the door opening 2 or, more precisely, in front of the surface of the furnace wall formed by the furnace wall. The door fans 4, 5, and 6 to 9 are fastened to the frame 3 or are held by the frame 3.

A closing mechanism not shown is attached to the frame 3 for the respective door leaf.

The individual parts of the drawing show where the door leaf can occupy. The closed state is shown in the upper part of Figures 1 and 2.

One or both of the door leaves can be opened depending on the requirements of the interior of the metallurgical furnace.

The particular features are shown at the bottom of Figures 1 and 2, wherein the door leaf forms an acute angle in the direction of the interior of the metallurgical furnace such that the gap remains between the opposite edges of the door leaf. This movability of the door leaf allows the door fence to be cleaned by pushing the slag back.

Finally, another position of the door leaf not shown in the figure is opened at an acute angle. In this case, as in the inwardly facing position, the gap is opened between the opposite edges of the door leaf, which allows the slag to flow out in a controlled manner.

Of course, the door leaf can also be locked in any other position, but the important position is at least as described above.

For example, when the door leaf can be individually adjusted and locked in different positions, this provides the possibility to control the amount of slag flowing out of the metallurgical furnace and/or the level of slag in the metallurgical furnace.

Finally, Figure 3 shows the different positions of the door leaf, in which case there are four door leaves arranged in pairs.

In the open position, the lower door leaf is used to monitor the slag and to clean the door rail, while the upper door leaf allows for continuous access to the inside of the metallurgical furnace in its open position, for example to perform maintenance work.

1. . . Metallurgical furnace wall

2. . . Door opening

3. . . frame

4. . . Door leaf

5. . . Door leaf

6. . . Door leaf

7. . . Door leaf

8. . . Door leaf

9. . . Door leaf

Figure 1 is a schematic illustration of the construction of a slag door having two door leaves, wherein the two door leaves are shown in different positions.

Figure 2 is another embodiment of two door leaves.

Figure 3 is an embodiment with four door leaves.

1‧‧‧ furnace wall of metallurgical furnace

2‧‧‧ door opening

3‧‧‧Frame

6‧‧‧ door leaf

7‧‧‧ door leaf

8‧‧‧ door leaf

9‧‧‧ door leaf

Claims (7)

A slag door of a metallurgical furnace, wherein a slag door opening of a container above the metallurgical furnace is provided with a door passage having a door sill, and the slag door is actuatable by a closing mechanism, wherein the closing mechanism is disposed at The outer side of the furnace wall of the metallurgical furnace and in front of the furnace wall, and the clear cross-sectional area of the slag door opening can be closed by at least two horizontally rotatable door leaves, wherein the at least two door leaves can be Locked in at least three positions, including a first position, wherein the at least two door leaves are substantially in a common plane; a second position that is perpendicular to the common plane and presents an open position; and a third position, wherein the at least two The door leaf forms an acute angle in a direction facing the interior of the metallurgical furnace and releases an open gap between the at least two door leaves. A slag door of a metallurgical furnace according to claim 1, wherein four door leaves are provided, and the door fans are arranged in pairs so that one pair is above the other pair. A slag door of a metallurgical furnace according to claim 1, wherein the door leaves are actuatable independently of each other. A slag door of a metallurgical furnace according to claim 2, wherein the door leaves are actuatable independently of each other. The slag door of the metallurgical furnace according to claim 3, wherein the door leaf can be individually adjusted and can be locked in different positions such that the amount of slag flowing out of the metallurgical furnace and/or the inside of the metallurgical furnace The slag level can be controlled. The slag door of the metallurgical furnace according to claim 4, wherein the door leaf can be individually adjusted and can be locked in different positions such that the amount of slag flowing out of the metallurgical furnace and/or in the metallurgical furnace The slag level can be controlled. The slag door of the metallurgical furnace according to any one of claims 1 to 6, wherein the door leaf can be locked in a position where the door leaf opens outward at an acute angle.