DE2653042A1 - Blast furnace lining cooling system - with dual purpose cooling boxes of specified dimensions - Google Patents

Abstract

Elements of the cooling system of the lining of a blast furnace are fixed to the masonry from the inside. Each cooling box has a length which exceeds the width and depth by a factor of 3-10 and is arranged in a vertical pattern. Each cooling box consists of a base plate to which an outer and an inner trough are welded by watertight joints. The coolant enters through connections and leaves through connections. The length L is 3-10 times the width and depth of each element.

Description

description

Cooling rod and cooling system made of cooling rods for Ho @@ ofenmanerwerk Die so far known cooling elements from Kühlsystomen for the masonry of shaft furnaces, preferably Blast furnaces are used as coolers, cooling boxes or cooling plates from the outside through cutouts shoved in the furnace armor into the fireproof masonry. This has the advantage that a cooling element can be replaced relatively easily in the event of damage.

On the other hand, the armor is made of many cutouts for cooling elements very weakened. Another major disadvantage of this method of banking is that that the armor in the lower area does not adequately shield the heat from the furnace, because the cooling elements are not tight at all because of the cutouts that weaken the armor enough to be able to be joined together.

As a result, cooling plates (staves) have recently been installed in the blast furnace building. enforced, which are attached to the inside of the tank.

Without weakening armor cutouts, these cooling plates can leak tight placed side by side and on top of each other. They then shield the entire inner surface of the tank completely against heat from the furnace as long as all of your cooling tubes without Water loss ensure an even heat transfer from the cooling plates.

But show up inside a plate or on the connecting pipes Water losses through leaks must be through a leaky pipe Cooling plate flowing cooling water are shut off. This plate will then only be incomplete, especially unevenly cooled. This has further spreading damage the once damaged cooling plate result. But you can have a scliadliafte Iilllplatte As is well known, only replace the blast furnace beforehand empty was driven. With the Houtigen large blast furnaces, that means a smell of loss Standstill in the blast furnace plant or in the smelter, which means that the iron delivery is undisturbed is aligned.

The present Nenerung to such a cooling system has to Task, the large-area bucket effect of the cooling plates (staves) through new types To achieve cooling rods, which do not have the defects of the cooling plates (staves) and what kind of mutual heat influence in the event of damage can be switched to an emergency water circuit if necessary.

For this cooling system, therefore, cooling elements in the Ferm of Suggested cooling rods arranged vertically in the blast furnace armor close to one another, in which the water flow advantageously only runs from bottom to top.

Furthermore, each vertical cooling channel runs in a completely independent one Cooling rod that can stretch independently and the neighboring rods cannot Heat transfer or crack formation influenced. Everyone standing upright as a precaution According to the invention, the cooling rod also has a second, preferably intended for hot cases Cooling duct that, in the event of damage, can replace the cooling rod with a second cooling circuit connects.

The new cooling elements in the form of cooling rods must also like cooling plates (staves) are attached to the inside of the armor to armor cutouts to avoid. In the event of damage, however, the ones that are close or close to one another will be Cooling rods from an interruption of the water cooling in a defective cooling rod not affected with /. In places, the cooling plate is no longer cooled by water would have a risk of cracking in the non-cooled part due to other thermal expansion the water-cooled sections of the cooling plate on the right and left.

Furthermore, according to the invention, a loose cooling rod will cause leak damage connected to an emergency cooling system with separate water connections. In the end the hollow rods can be manufactured from heat and wear-resistant cast steel whose wall thickness allows for reliable surface cooling, without that pipes at risk of cracking must be poured in.

The details of these cooling rods are expedient in some exemplary embodiments explained in Figs.

Fig. 1 is a view of the cooling rod from the inside of the squat furnace in direction on the tank.

Fig. 2 is a section through the cooling rod in the vertical center plane.

Fig. 3 is a plan view, in section, of an armor section P. All 3 figures show the outer tub 1 and inner tub 2, which are on the base plate 3 are attached watertight.

4 shows a pre-large section IV for obscuration the water guide rib 15.

Fig. 5 corresponds to Fig. 1, with only the retaining bolts 11 and the Long holes 12 from Fig. 1 nunme @ r are perpendicular to the tub 1 and the holes 12 '' crawls under tub 1. Hierdurc @ reduces the bar boards from B. B ', Fig. 6 shows variants of the Rchrstuizen 41, 51, 61 and 71, to which in the further description is to be given.

In Fig. 2, the cooling water entry is in the cavity between the inner trough 2 and Anssenwanne 1 shown through the opening 4 and the cooling water drain through the opening 5. A second cooling water flow through the cooling steel can be formed by entering the water through opening 6 and draining through @ i @ opening 7, as soon as this is considered to be two-way or becomes necessary as a result of a Lockse @ adens on the @@ sseren @ ü @ oil flow from 4 to 5.

According to the invention, the cooling box length L is a multiple, namely 3 to 10 times width B or depth T. It is shown in Fig. 1 and 2 in abbreviated form. The outer trunk 1, which is caused by the Cfen gases rising in the Cfenraum and through the descending Möller is exposed to erosion and wear and tear, can be caused by ribs 13 and 14 reinforce @erden.

In a well-known manner, the cooling rods can also protect against wear and burn-off are protected by fire-proof manerwork, which is not shown and what lies between or from the cooling rods.

Because the long water-cooled cooling rods have a different thermal expansion as the tank, they are vertical only at one altitude, for example held by means of the Belzen and holes li, or by the nozzle 51 in Fig. 6, while the remaining holes 12 or the breakthroughs, not shown, through the Panzer P can be made with play.

It is left to the individual case of use, @@ @lle 4 openings 4, 5, 6, 7 in the cooling rod for the cooling water flows already through holes in the tank P, cf. Fig. 6 @ ierdure @ are connected to roller lines 4 ', 5', 7 ', or whether the connections 6 ', 7' only required in the event of damage only after a Leckse @ adess with the leches cooling rod by @ making the holes for the @ nse @ l @ sse 6 ', 7' can be produced at the Nochofen. In Fig. 6 only the cooling water supply would be 7 'and the hole 6' 'in tank P is indicated. Was shown at at this point that the cooling water space @@ 2 'in the cooling rod may be at @ontage is shielded by capper 62. @ie @ohrverbindungen 7 'then only becomes in case of failure bergestell '.

If there are several coolers in between of a tank P against each other, the lateral flanges @ c in the @round plate 3 led Betzen 11 ans fig. 1 and Fig. @ @ Rset @@ by corresponding connecting elements 11, which, for example, according to FIG. 5 in the longitudinal axis the cooling rods are to be accommodated. This changes the cooling rod width B (Fig. 1 and 3) in D '(Fig. 5).

The connection between a cooling rod and the tank can of course can also be done by welding the base plate 3 to the armor, if the Cooling rod can be mounted without play between the armor and the base plate 3, and if there are no concerns about thermal stresses between armor P and base plate 3.

Furthermore, the cold of a cooling rod in the cooking armor can still FIG. 6, for example, through the connecting piece 51 or cast onto the base plate 3 welded connection piece 41 in the vertical direction and tangential to the armor P direction are formed. For this purpose, not shown, welded to the Parzer Can be used cold.

The radial distance between the cooling rod and the armor can, for example with the help of bolts 11 that are spot welded on the tank P and by means of the spacers 111 can be produced. @ierbei the bolt 11 is only in one place of the long Cooling rod fixed immovably in the base plate 3, while for the purpose of thermal flattening all other holes 12 and 12 '' for the bolts 11 and 11 'play in the base plate 3 received. The holes in the tank P are dimensioned according to the same idea.

Fig. 6 finally shows that the connecting pipes 4 and 5 'can be connected to the connecting pieces 41 and 51 by welding, with 2, 3 and 4 show the gas-tight seals that are still required is not shown at the armor breakthroughs. Fig. 2 and 3 show as connecting means Pipe threads on the nozzles 41, 51, 61 and 71 which if necessary by protective caps 62 must be shielded.

Claims (8)

P a t e n t a n s p r ü c h e 1. Cooling rod and cooling system made of cooling rods for blast furnace masonry, fixed in the armor from the inside, for connection to one or several cooling water flows, indicating that the length of the cooling rod (L) in the shell is approximately vertical and 3 to 10 times its width (B) and depth (T). 2. Cooling system with cooling rods according to claim 1, d a d u r c h g e k It is noted that the cooling rods are close together or spaced apart equal to or smaller than (B) or (T) attached next to and on top of each other in the tank will. 3. Cooling rod according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that this consists of an elongated base plate (3) on which an inner trough (2) is attached and a cooling water space (2 ') with inlet (6) and outlet (7) limited, and that above this inner trough (2) an outer trough (1) is attached and a second cooling water space (1 ') with cooling water inlet (4) and outlet (5) encloses. 4. cooling rod according to claim 1 and 3, d a d u r c h g e k e n n- @ e i c h n e t that the two tubs (1) and (2) made of @ itze- and wear-resistant Rod cast exist, while the base plate (3) consists of a well weldable with the tubs @ is manufactured from salt steel or cast steel. 5. cooling rod according to claim 4, d a d u r c h g e k e n nz e i c h n e t that the tubs (1) are protected against wear with ribs (13), that Ribs (14) for supporting the refractory material are provided, and that ribs (15) on the inner tub (2) the water flow between the outer tub (1) and the inner tub (2) direct. 6. cooling rod and cooling system of cooling rods according to claim 1 to 5, d a d u r c h e k e n n n z e i c h n e t that the water connections in the form of the Base plate (3) cast on or welded to socket (41) and (51) through 2 Holes in the armor (P) are plugged, and that these nozzles from the outside with connecting pipes (4 ', 6') are connected. 7. cooling rod according to claim 6, d a d u r c h g e k e n nzei c h n e t that the nozzles (41 and 51) of the water connections (4, 5) vertical and horizontal Press from @em cooling rod to transfer the hole reveals in the armor (P) while bolts inserted through the base plate (3) next to, above or below the tub (1) (11) with rings (111) absorb forces perpendicular to the armor. 8. cooling rod and cooling system made of cooling rods according to claim 1 to 7, d a d u r c h g e k e n n n n z e i c h n e t that for the nozzles (61) and (71) first if necessary, holes (6 ", 7") are cut in the armor (P), and that the openings (6 and 7) of which are covered by protective hoods (62).