MXPA06008740A - Metallurgical vessel - Google Patents

Abstract

Cooling panels (31) are attached to the shell (11) of a metallurgical vessel to form an internal lining of the shell. Each panel (31) comprises a coolant flow tube (36) bent to form inner and outer panel sections (37, 38) of zig-zag formation. Panel mounting pins (43) connected to the outer panel section (38) by connector straps project laterally outwardly from the panel through openings (45) in the shell and tubular shell protrusions (46) surrounding the openings (45). The ends of pins (43) are connected to the outer ends of protrusions (46) by welding metal discs (47) thus forming connections exteriorly of the shell in a way which seals the openings (45). Coolant inlet and outlet connectors (42) for the panel project outwardly through openings (48) in the shell and surrounding tubular protrusions (49) and connections are made by welding discs (51) between the connectors (42) and protrusions (49).

Description

METALLURGICAL RECIPIENT FIELD OF THE INVENTION The present invention relates to the construction of metallurgical containers in which metallurgical processes are performed. The invention has a particular, but not exclusive, application in containers used to perform direct casting to produce molten metal in pure form or alloy of a metalliferous feedstock such as minerals, partially reduced minerals and waste streams containing metal. BACKGROUND OF THE INVENTION A known direct smelting process, which is mainly aided in a layer of molten metal as the reaction medium, and generally referred to as the Hlsmelt process (high smelting), is described in US Patent 6267799 and Publication. International Patent WO 96/31627 in the name of the applicant. The Hlsmelt process as described in these publications comprises: (a) forming a bath of molten iron and slag in a container; (b) injecting into the bath: (i) a metal feed material, usually metal oxides; and (ii) a solid carbonaceous material, normally REF.174823 carbon, which acts as a reducing agent for metal oxides and a source of energy; and (c) melt. the metalliferous metal feed material in the metal layer. The term "smelting" in the present is understood to be the thermal processing where the chemical reactions that reduce the metal oxides to produce liquid metal occur. The Hlsmelt process also includes the post-combustion reaction gases, such as CO and H2 released from the bath, in the space above the bath with oxygen-containing gas and the heat transfer generated by the post-combustion to the bath to contribute to the energy thermal required to melt metalliferous feed materials. The Hlsmelt process also comprises forming a transition zone on the nominal resting surface of the bath in which there is a favorable mass of ascending and then descending droplets or splashes or streams of molten metal and / or slag which provide an effective means for transferring to the bath the thermal energy generated by the post-combustion reaction gases on the bath. "In the Hlsmelt process, the metalliferous feed material and solid carbonaceous material is injected into the metal layer through a number of nozzles / nozzles that are inclined to the vertical to extend downwardly and internally through the side wall from the melting vessel and in the lower region of the vessel to supply the solids material in the metal layer at the bottom of the vessel To promote the subsequent combustion of the reaction gases in the upper part of the vessel, a blast of hot air , which can be enriched oxygen, is injected into the upper region of the container through the hot air injection lance that extends downwards.The gaseous discharge resulting from the post-combustion of the reaction gases in the container is Removes from the upper part of the container through a conduit for the gas discharge. The Hlsmelt process allows large quantities of molten metal to be produced by direct casting in a single compact container. This container must function as a pressure vessel containing solids, liquids and gases at very high temperatures through a melting operation that can last for a long period. As described in U.S. Patent 6322745 and the International Patent Publication WO 00/01854 in the name of applicant, the container may consist of a steel cover with a crucible contained therein formed of refractory material having a base and sides in contact with at least the molten metal and the lateral walls extending upwardly from the sides of the crucible that are in contact with the slag layer and the continuous gas space, with at least part of the side walls consisting of panels cooled in water. Such panels may be of double serpentine shape with the tamped or compressed refractory material intermixed. Other metallurgical vessels have been provided with internal refractory and refractory cooling systems. In a blast furnace that makes conventional iron for example, the cooling system generally comprises a series of cooling stoves of robust cast iron construction capable of withstanding the forces generated by the large amounts of load that extend up through the column of the blast furnace. These stoves are replaced only during a liner change, during which the blast furnace is switched off for a prolonged period. Currently, the period between a change of lining for a blast furnace that operates continuously can be around twenty years and a lining change is prolonged over a number of months. Electric arc furnaces, such as those used for the production of steel batches, on the other hand, can use cooling panels that are simply suspended from a support cage that can be reached when the lid is removed and treated almost like materials consumables They can be replaced and / or repaired during other programmed times or between warm-ups. The metallurgical vessel for carrying out the Hlsmelt process presents unique problems AS the process operates continuously, and the container must be closed with a pressure vessel for long periods, normally of the order of one year or more and then "must be returned to lining up rapidly in a short period of time as described in US Patent 6565798 on behalf of the applicant This requires the installation of internal water cooling panels in an area to which access is limited. It is convenient that the damaged panels can be replaced without interfering with the integrity of the outer shell and its operation as a pressure vessel BRIEF DESCRIPTION OF THE INVENTION The present invention provides a metallurgical vessel comprising: an outer shell; and a plurality of cooling panels forming an inner liner for at least one upper part of the container, each panel having internal passages for the flow of the cooling liquid therethrough; wherein the outer cover is provided adjacent to each cooling panel with a plurality of openings surrounded by tubular projections protruding outwardly from the cover and each panel is provided with a plurality of projections projecting laterally of the panel through the openings on the outer casing and connected to the outer ends of the tubular projections in connections connecting the cooling panel to the outer casing and sealing the openings. The cooling panels can be lined inside the container with refractory material to form an inner refractory lining for the container, the cooling panels are operable by the flow of the cooling liquid through the passages to cool the refractory material. The projections may be of elongated formation and may project laterally from the panel in mutually parallel relation to each other. The projections can include a series of bolts. The projections may further comprise tubular coolant inlet and outlet connectors for the panel. The container cover may include a generally cylindrical section lined with a series of cooling panels. The panels of such a series may be of elongated arcuate formation with a curvature to equalize the curvature of the generally cylindrical section of the container.

The arched panels can be placed in vertically spaced rows of the panels circumferentially spaced from the container. The panels can be spaced narrowly and to reduce the required spacing between the circumferentially spaced panels to allow removal of each panel by body movement thereof, there can be at least six panels circumferentially spaced in each row. More specifically, these may be in the order of eight panels in each row. The panels can be comprised of cooling flow tubes made in zigzag formations to form the panels. In that case, the projections can be comprised of bolts attached to the zigzag tube formations and the tubular coolant inlet and outlet connectors extending from the ends of the zigzag tubular formations. Each panel may have internal and external zigzag formations that form internal and external panel sections relative to the container cover. During the use of the container, the water can be passed through the internal passages of the panels to serve as a coolant. The invention also provides a method of mounting a cooling panel in an outer shell of a metallurgical vessel to form part of an inner liner of the shell, comprising: providing the cooling panel with a plurality of projections projecting laterally from the shell. panel, provide the outer cover of the container with a plurality of openings to receive the projections of the panel and with tubular protrusions surrounding the openings and protruding outwardly from the cover, extending the projections through the openings in the cover to put the panel in a position in which it forms part of the interior of the cover, and form connections between the projections and the outer ends of the tubular projections on the outside of the cover whose connections mount the panel on the outer cover and seal the openings. The invention further provides a cooling panel for mounting to an outer shell of a metallurgical vessel to form part of an inner liner of the shell, comprising: a panel body having an internal passage means for the flow of the cooling liquid to Through it, and a plurality of projections projecting laterally of the panel on one side of the panel body and capable of supporting the panel as it extends through the openings in the cover and connected to the cover externally of the container. The panel body may comprise a tube of the coolant flow made in a zigzag formation. More specifically, the panel body can be formed from a single coolant tube made to form adjacent internal and external panel sections of zigzag formation and such projections can project laterally and externally from the outer panel section. The panel may be of elongated arched formation. The outer panel section can be placed on the outer side of the panel curve with the projections projecting laterally and externally in parallel relation to each other and to be parallel to a central plane extending laterally of the panel and radially of the curvature of the bread l. The projections may comprise a series of tubular coolant inlet and outlet tubing pins and connectors extending from the ends of the coolant flow tube. The tubular coolant connectors can be placed at one end of the panel and the bolts can be spaced across the panel between their ends.

The bolts can be connected to the panel by means of connection fasteners each fastened at their ends to the adjacent tubular segments of the inner panel section and extending between their ends externally through a tubular segment of the outer panel section. The connecting fasteners may be generally V-shaped with the root of the V-shape curved to fit over the respective tube segment of the outer panel section. The bolts can be welded to the connecting fasteners to extend outwardly from the roots of the V shapes. BRIEF DESCRIPTION OF THE FIGURES In order to more fully explain the invention, a particular embodiment will be described in some detail with reference to the accompanying figures, in which: Figure 1 is a vertical cross section through a direct casting container provided with cooling panels according to the present invention; Figure 2 is a plan view of the container shown in Figure 1; Figure 3 illustrates the arrangement of the cooling panels that line a part of the main cylindrical barrel of the container; Figure 4 is a mode of the cooling panels shown in Figure 3; Figure 5 is a modality schematically showing the complete system of cooling panels adapted to the container; Figure 6 is an elevated view of one of the cooling panels adapted to the cylindrical barrel section of the container; Figure 7 is a flat view of the panel shown in figure 6; . Figure 8 is a cross-section on line 8-8 of Figure 6; Figure 9 is a front view of the cooling panel illustrated in Figure 6; Figure 10 illustrates a detail of the cooling panel; and Figures 11 and 12 illustrate details of the connection of a cooling panel to the container cover. DETAILED DESCRIPTION OF THE INVENTION Figures 1 and 2 illustrate a convenient direct casting vessel for the operation of the process of Hlsmelt as described in U.S. Patent 6267799 and International Patent Publication WO 96/31627. The metallurgical vessel is generally denoted by the number 11 and has a crucible 12 including a base 13 and sides 14 formed of refractory bricks, a feeder 15 for discharging the molten metal continuously and a pouring hole 16 for discharging the molten slag. The base of the container is fixed to the lower end of an outer cover of the container 17 made of steel and comprising a main cylindrical barrel section 18, internally tapered ascending ceiling section 19, and an upper cylindrical section 21 and the lid section 22 defining a gas discharge chamber 26. The upper cylindrical section 21 is provided with a large diameter outlet 23 for gas discharge and the cover 22 has an opening 24 in which a gas injection lance is mounted which extends down to supply a burst of hot air in the upper region of the container. The main cylindrical section 18 of the cover has eight circumferentially spaced tubular assemblies 25 through which the solids injection lances extend for injecting iron ore, carbonaceous material, and flows in the lower part of the container. In use, the vessel contains a molten iron and slag bath and the upper part of the vessel must contain the hot gases under pressure and extremely high temperatures of the order of 1200 ° C. Therefore the vessel is required to operate as a pressure vessel for long periods and must be of robust construction and completely sealed. The access to the interior of the container is extremely limited, the access is essentially limited during the closing through opening of the lid 24 and during the change of lining of the access doors 27. The cover 11 of the container is internally lined with a system of individual cooling panels 107 through which the cooling water circulates and these cooling panels are wrapped with refractory material to provide an internal refractory liner cooled with water for the container over the casting zone. It is important that the refractory lining be virtually continuous and that all refractory material be "subjected to cooling because the uncooled refractory material will rapidly erode." The panels are formed and attached to the cover in such a way that they can be installed internally within the cover 11 and can be removed and replaced individually during stoppage without interfering With the integrity of the roof, the cooling panels consist of a system of forty-eight panels 31 that line the main cylindrical barrel section 18 of the roof and a system of sixteen panels 32 that line the section of tapered roof 19. The first four panel system 33 lines a lower part of the gas discharge chamber 26 immediately above the tapered roof section 19. Twenty panels 34 line the section of the gas discharge chamber 26 on the first four panel system 33. Eleven panels 35 cover the cover 22 and eight panels 40 cover the exit 23. The panels of the gas discharge chamber and the lower row ior of panels in the barrel section are formed of a single layer of tubes, while the remaining panels of the barrel section 31 and also of the section 19 of tapered roof are formed of a double layer of tubes, placed one in front of the another relative to the cover of the container 17. The lowermost row of the panels 31 in the barrel section is located behind the refractory material of the crucible and is closer to the molten metal. In the case of significant refractory erosion or chipping, there is a potential for these panels to come into contact with the molten metal and therefore are preferably constructed of copper. The remaining panels in the barrel section and also the gas discharge chamber 26 can be constructed of steel. The construction of the panels 31 and the manner in which they are mounted on the main cylindrical barrel 18 of the container cover is illustrated in Figures 6-12. As shown in figures 3, 4 and 5, these panels are placed in 6 vertically spaced rows of arched panels circumferentially spaced from the container, with eight individual panels 31 in each row. Each panel 31 is comprised of a cooling liquid flow tube 36 inclined to form the inner and outer panel sections 37, 38 of zigzag formation. The inner and outer panel sections 37, 38 are also vertically offset such that the horizontal tube segments of a panel section are located intermediate to the horizontal tube segments of the other panel section. The tubular coolant inlet and outlet connectors 42 extend from the inner panel section in preferably one end of each panel, although they may also extend from other sections of, or locations in, the panel. The panels 31 are of elongated arcuate formation having greater length than height and with a curvature to equal the curvature of the main cylindrical barrel section 18 of the cover. As can be seen from Figures 3 and 4, a series of openings 55 are formed within the group of barrel panels 31. These openings 55 are aligned with the circumferentially spaced tubular mounts 25 and operate to provide sufficient clearance for the lances of injection of solids into the interior of the container 11. Normally the openings are formed to generally accommodate the injection spears of cylindrical solids that extend through the cover of the container 17 and the panels 31 so as to form an angle in a vertical plane tangential to the cover of the container 17 at the central point of the penetration. The openings 55 are formed by the alignment of two or more panels having grooves formed along one edge. The slots can be along the vertical or horizontal edges or they can be in one or more corners. The tubular assemblies 25 are circumferentially spaced from the container at a common height. The panels forming the openings 55 are of a length corresponding to the circumferential distance between the tubular assemblies 25 such that normally the center line of each lance is aligned with the vertical edge of two or more adjacent panels. This arrangement results in panels in the region of solids injection lances having grooves along both vertical edges. These slots can extend to the upper or lower corner of the panel. A group of four mounting bolts 43 are connected to the zigzag tubular formation of the outer panel section 38 by means of connection fasteners 44 to project laterally and externally from the panel. Each connecting fastener 44 is fastened at its ends to the adjacent tubular segments of the inner panel section and extends between its ends externally through a tubular segment of the outer panel section in the manner shown more clearly in Figure 10. The connecting fasteners 44 are generally V-shaped with the root of the curved V-shape to fit snugly over the tubular segment of the outer panel section. The bolts 43 are welded to the connecting fasteners to thereby extend outwardly from the roots of the V-shaped shapes. The connecting brackets serve to secure the panels by clamping the tubular segments stably in spaced relation at the multiple locations distributed through the panels. , resulting in a strong but flexible panel construction. The mounting bolts 43 extend through the openings 45 in the cover 17 and the tubular projections 46 that surround the openings 45 and protrude outwardly from the cover 17. The ends of the bolts 43 project beyond the flanges 57 located at the outer ends of the tubular projections 46. The bolts 43 are connected to the flanges 57 by welding the annular metal discs 47 to the pins 43 and to the flanges 57 thereby forming connections externally of the cover in a manner that seals the openings 45. In a similar way, the input and output connectors 42 for the panel project outwardly through the openings 48 in the cover 17 and through and beyond the tubular projections 49 surrounding these openings and projecting outwardly from the cover and the connections are made soldering the annular discs 51, between the connectors 42 and the flanges 59 located at the end of the projections 49. In this way, each panel 31 is mounted on the cover through the four pins 43 and the coolant connectors 42 a the individual connections externally of the cover. The coolant bolts and connectors are adjusted separately inside the tubular projection tubes 46, 49. The projections 46, 49, the flanges 57, 59, the disks 47 and the bolts 43 are rigid and have sufficient strength to withstand the loading of the panels in a cantilevered manner from the end of the projections when the panels are operational and therefore filled with cooling water and wrapped in refractory material. The panels 31 are removed by grinding the weld between the bolts 43 and the flanges 57 and between the coolant connectors 42 and the flanges 59. In this way the panels are easily removed. The flanges 57, 59 can also be removed by grinding before replacement of the panels that are installed. This method allows the panels to be removed with limited damage to the flanges 57, 59, the projections 46, 49 and therefore to the container 11. The pins 43 and the coolant inlet and outlet connectors 42 are oriented to project sideways and externally from the panel in parallel relation to each other and thus be parallel with a central plane laterally extended through the panel radially of the container so that the panel can be inserted and removed by the body movement of the panel internally or externally of the barrel of the barrel. container. The slots 53 between the circumferential spaced panel 31 should be sufficient to allow the rear outer edges of a panel to be removed to release the inner edges of the adjacent panels when the panel to be removed is withdrawn inwardly along the direction of the panels. bolts 46 and connectors 42. The size of the grooves required is dependent on the length of the arched panels and therefore on the number of panels extending in the circumference of the barrel section 18. In the illustrated embodiment, there are eight panels circumferentially spaced in each of the six rows of panels 31. It has been found that this allows for minimal slits between the panels and ensures proper cooling of the refractory material in the slits. Generally for satisfactory cooling it is necessary to divide each row into at least six circumferentially spaced panels. Additionally, the arcuate length of an outer panel section may be less than the arcuate length of an inner panel section. Such an arrangement allows the slit 53 between the inner panel section of the adjacent panels to be minimized compared to an arrangement where the outer panel section and the inner panel section are of the same length. The refractory retaining bolts 50 are butt welded in the coolant tubes of the panels 31 so as to project internally from the panels and act as anchors for the refractory material when the panels are sprayed. The bolts 50 can be arranged in groups of these radiating bolts externally from the respective tube and arranged in regular spacing along the tube through the panel. The panels 33 and 34, adapted to the cylindrical curved sections of the container, are formed and assembled in the same manner as the panels 31 as described above, but some of the panels 34 are formed in the manner shown in Figure 5 for thus fit around the gas discharge outlet 23. Panels 32 and 35, which adapt to the tapered sections of the cover, are generally conically curved in the manner shown in the illustrated embodiment of Figure 5. Except for this variation in shape. However, these panels are also formed and mounted on the cover in the manner similar to panels 31, each fitting with the mounting bolts projecting laterally and externally from the panel and a pair of inlet coolant connectors. / outlet at the opposite ends of the panels, the bolts and connectors that extend through the openings in the cover and connected to the tubes that project laterally and externally from the cover to form the exterior connections of the cover that seal the openings and provide a secure mounting for the panels while allowing some freedom of movement of the panels. The illustrated embodiment of the invention has been advanced by way of example only. It should be understood that the invention is not limited to the construction detail of this embodiment. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (41)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property: 1. Metallurgical container, characterized in that it comprises: an external cover; and a plurality of cooling panels that form a liner. interior for at least one upper part of the container, each panel has internal passages for the flow of the refrigerant liquid therethrough; wherein the outer cover is provided adjacent to each cooling panel with a plurality of openings surrounded by tubular projections projecting outwardly from the cover and each panel is provided with a plurality of projections projecting laterally of the panel through the openings in The outer cover and are connected to the outer ends of the tubular projections in connections that connect the cooling panel to the outer cover and that seal the openings.
2. 2. Container according to claim 1, characterized in that the projections and projections are rigid and the connections between them provide the panel assemblies to support the loading of the panel.
3. 3. Container according to claim 2, characterized in that the connections comprise plate members having openings that locate the projections, the plate members are welded to the projections and to the outer ends of the projections to seal the openings.
4. Container according to any of the preceding claims, characterized in that the cooling panels are lined inside the container with refractory material to form an inner refractory lining for the container, the cooling panels are operable by the flow of the cooling liquid through of the passages to cool the refractory material.
5. Container according to any of the preceding claims, characterized in that the projections are of elongated formation and project laterally of the panel in mutual relation and parallel to each other.
6. Container according to any of the preceding claims, characterized in that the projections include a series of bolts.
7. 7. Container in accordance with the claim 6, characterized in that the projections additionally comprise tubular inlet and outlet connectors of the coolant for the panel.
8. Container according to any of the preceding claims, characterized in that the container cover includes a generally cylindrical section lined with a series of cooling panels.
9. 9. Container in accordance with the claim 8, characterized in that the panels of such series are of elongated arcuate formation with a curvature to equalize the curvature of the generally cylindrical section of the container.
10. 10. Container in accordance with the claim 9, characterized in that the panels of such series have greater length than height.
11. 11. Container according to claim 9 or 10, characterized in that the projections project laterally and externally in parallel relation to each other and thus be parallel with a central plane extending laterally of the panel and radially of the curvature of the panel.
12. Container according to any of the preceding claims 8 to 11, characterized in that the panels of such series are placed in vertically spaced rows of circumferentially spaced panels of the container.
13. 13. Container according to claim 12, characterized in that the panels are closely spaced but with slots between the circumferentially spaced panels sufficient to allow the removal of each panel by the body movement thereof.
14. Container according to claim 13, characterized in that there are at least six circumferentially spaced panels in each row.
15. 15. Container according to any of the preceding claims, characterized in that the panels comprise coolant flow tubes made in zigzag formations to form the panels.
16. 16. Container according to claim 15, characterized in that the projections comprise bolts attached to the zigzag tube formations and the tubular coolant inlet and outlet connectors extending from the ends of the zigzag tubular formations.
17. 17. Container in accordance with the claim 15 or 16, characterized in that at least a portion of the panels have internal and external zigzag formations forming the inner and outer panel sections relative to the container cover.
18. 18. Container in accordance with the claim 17, characterized in that the arcuate length of the outer panel section is smaller than the arcuate length of the inner panel section such that it allows a slit between the vertical edges of the adjacent panels to be minimized.
19. 19. Container according to claim 17 or 18, characterized in that the inner panel section and the outer panel section are offset vertically such that one or more horizontal tube segments of a panel section - are intermediate horizontal tube segments located at the other panel section.
20. 20. Container according to any of the preceding claims, characterized in that it additionally comprises a refractory lined crucible, a barrel section placed on the refractory lined crucible and a gas discharge chamber positioned on the barrel section.
21. 21. Container in accordance with the claim 20, characterized in that a portion of the barrel section is lined with double layer panels and the gas discharge chamber is lined with single layer panels.
22. 22. Container in accordance with the claim 21, characterized in that only a lower row of panels in the barrel section comprises single layer panels.
23. 23. Container according to any of the preceding claims, characterized in that the container locates a plurality of solids injection lances each extending through a plurality of openings in the outer cover in an interior region of the container and the plurality of panels Cooling provides a plurality of openings corresponding to the openings in the outer cover whereby the lances extend through the panels' inside the container.
24. 24. Container in accordance with the claim 23, characterized in that at least one opening is provided by a slot located in an edge of at least one panel.
25. 25. Container in accordance with the claim 24, characterized in that at least one opening is provided by the alignment of at least two grooves located along the edges or at the corners of two or more panels.
26. Container according to any of claims 23 to 25, characterized in that the lances are located at a common height in the container cover of at least some of the panels located at the height of the lances with a length corresponding substantially to the arched distance between the spears.
27. 27. Cooling panel for mounting to an external cover of a metallurgical vessel to form part of an inner liner of this cover, characterized in that it comprises: a panel body having an internal passage means for the flow of the cooling liquid through the same, and a plurality of projections projecting laterally of the panel on one side of the panel body and capable of supporting the panel as they extend through the openings in the cover and connected to the cover externally of the container.
28. 28. Cooling panel according to claim 27, characterized in that the panel body comprises a cooling liquid flow tube made in a zigzag formation.
29. Cooling panel according to claim 28, characterized in that the panel body is formed from a single coolant tube made to form the adjacent inner and outer panel sections of the zigzag formation and the projections project laterally and laterally. externally from the outer panel section.
30. 30. Cooling panel according to claim 29, characterized in that the inner panel section and the outer panel section are offset vertically such that one or more horizontal tube segments of a panel section are located intermediate horizontal tube segments of the other panel section.
31. Cooling panel according to claim 29 or 30, characterized in that the length of the "external" panel section is less than the length of the inner panel section whereby, in use, it allows a slit between the edges
32. 32. The cooling panel according to any of claims 29 to 31, characterized in that the panel is of elongated arched formation and the outer panel section is placed on the outer side of the panel curve. with the projections projecting laterally and externally in parallel relation to each other and to be parallel with a central plane extending laterally of the panel and radially of the panel curvature
33. 33. Cooling panel according to any of claims 29 to 32, characterized in that the panel is of elongated arcuate formation having a greater length than height
34. 34. Cooling panel in accordance with n any of the preceding claims 29 to 33, characterized in that the projections comprise a series of bolts and tubular coolant inlet and outlet connectors extending from the ends of the coolant flow tube.
35. 35. Cooling panel according to claim 34, characterized in that the tubular coolant connectors are placed at one end of the panel and the bolts are spaced through the panel between their ends.
36. 36. Cooling panel according to claim 34 or 35, characterized in that the bolts are connected to the panel by means of connection fasteners each fastened at their ends to adjacent tubular segments of the inner panel section and extending between their ends externally through a tube segment of the outer panel section.
37. 37. Cooling panel according to claim 36, characterized in that the connecting fasteners are generally V-shaped with the root of the V-shape curved to fit over the respective tube segment of the outer panel section.
38. 38. Cooling panel according to claim 36, characterized in that the bolts are welded to the connection fasteners to extend externally from the roots of the V-shapes.
39. 39. Method for mounting a cooling panel on an external cover of a Metallurgical container to form part of an inner liner of this cover, characterized in that it comprises: providing the cooling panel with a plurality of projections projecting laterally from the panel, providing the external cover of the container with a plurality of openings to receive the panel projections and with tubular protrusions surrounding the openings and protruding outwardly from the cover, extending the projections through the openings in the cover to bring the panel into a position in which it forms part of the interior of the cover, and form connections between the projections and the. external ends of the tubular projections on the outside of the cover whose connections mount the panel on the outer cover and seal the openings.
40. 40. Method according to claim 39, characterized in that the cover is provided with tubular projections that surround the openings and protrude externally from the cover and the connections are formed between the projections and the outer ends of the tubular projections.
41. 41. Method according to claim 39 or claim 40, characterized in that the cooling panel is in accordance with any of claims 28 to 39.