CN214218767U - Blast furnace cooling wall - Google Patents
Blast furnace cooling wall Download PDFInfo
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- CN214218767U CN214218767U CN202023174456.XU CN202023174456U CN214218767U CN 214218767 U CN214218767 U CN 214218767U CN 202023174456 U CN202023174456 U CN 202023174456U CN 214218767 U CN214218767 U CN 214218767U
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Abstract
The utility model provides a blast furnace cooling wall belongs to metallurgical equipment technical field. The blast furnace cooling wall comprises a cooling wall body, the cooling wall body is a copper-steel composite plate component, one side of a copper plate of the copper-steel composite plate component is close to the inner side of the blast furnace, and one side of a steel plate of the copper-steel composite plate component is arranged on the wall of the blast furnace; the blast furnace cooling wall also comprises a water channel cover, a water channel is arranged on one side of the steel plate far away from the copper plate, and the water channel cover is a convex cover body protruding towards one side far away from the copper plate; the water channel cover is arranged at the open end of the water tank and is connected with the steel plate, and the water channel cover and the water tank are enclosed to form a water channel. The utility model provides a blast furnace stave covers and sets up the basin in steel sheet one side through setting up the water course of welding on the steel sheet to this encloses jointly and closes the formation water course, and sets up the water course lid into convex lid through covering, increases the water cross sectional area of water course under the condition of not increasing steel sheet and copper thickness excessively, so that blast furnace stave reaches predetermined cooling effect, reduces the volume and the weight of blast furnace stave.
Description
Technical Field
The utility model belongs to the technical field of metallurgical equipment, more specifically say, relate to a blast furnace stave.
Background
In order to improve the heat transfer performance of the furnace body cooling wall in the high heat load area of the blast furnace, researchers developed copper cooling walls. The copper cooling wall has the characteristics of strong heat transfer capacity, excellent heat flow impact resistance, excellent thermal shock resistance and the like. The cooling water channel in the copper cooling wall is obtained by drilling, so that the defect of poor heat transfer performance caused by a high-heat-resistance coating and an air gap between the cooling water pipe and the wall body of the nodular cast iron cooling wall is overcome. However, during the application process, the applicant finds that the copper cooling wall is easy to generate abrasion damage and bending deformation.
So that the copper-steel cooling wall can be produced. The copper-steel cooling wall has high strength and strong bending resistance, and overcomes the defects of easy abrasion and damage and bending deformation of the copper cooling wall. In the copper-steel cooling wall, the cooling water channel is generally a round hole channel and is arranged on one side of a steel plate or a copper plate through drilling. In order to achieve a certain cooling effect, the aperture of the cooling water channel is usually large, which also results in that the thickness of the steel plate or the copper plate must be large enough, which results in that the copper-steel cooling wall is heavy and heavy as a whole and has high manufacturing cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blast furnace stave aims at solving current blast furnace stave and exists in order to reach the cooling effect and lead to the whole comparatively heavy, the high technical problem of manufacturing cost of stave.
In order to achieve the above object, the utility model adopts the following technical scheme: the cooling wall body is a copper-steel composite plate component, one side of a copper plate of the copper-steel composite plate component is close to the inner side of the blast furnace, and one side of a steel plate of the copper-steel composite plate component is installed on the wall of the blast furnace;
the blast furnace cooling wall also comprises a water channel cover, a water tank is arranged on one side of the steel plate, which is far away from the copper plate, and the water channel cover is a convex cover body which is convex towards one side, which is far away from the copper plate; the water channel cover is arranged at the opening end of the water channel and is hermetically connected with the steel plate, the water channel cover and the water channel are enclosed to form a water channel,
the blast furnace cooling wall also comprises a water pipe for communicating an external cooler with the water channel, and the water pipe is connected with the water channel cover.
Further, the water tank extends to the copper plate in a depth direction to enhance a cooling effect of the copper plate.
Furthermore, the water tank is of a rectangular tank body structure, and the water channel cover is a convex arc cover body which is convex towards one side far away from the copper plate.
Further, the water channel cover is a semicircular pipe type cover body, and the diameter of the water channel cover is equal to the width of the water tank.
Further, the blast furnace cooling wall further comprises a sleeve assembly, the sleeve assembly comprises an inner side sleeve sleeved on the outer side of the water pipe and an outer side sleeve sleeved on the outer side of the inner side sleeve, and the inner side sleeve and the outer side sleeve are respectively connected with the water channel cover.
Further, a gap is formed between the inner sleeve and the water pipe, and a gap is formed between the outer sleeve and the inner sleeve.
Furthermore, one side of the copper plate, which is far away from the steel plate, is provided with a groove, a fireproof material is arranged in the groove, and the distance between the groove bottom of the groove and the groove bottom of the water groove is greater than 20 mm.
Furthermore, one side of the copper plate, which is far away from the steel plate, is provided with a plurality of first reinforcing ribs, and each first reinforcing rib is connected to the edge of the steel plate in a closed structure in an end-to-end connection manner.
Furthermore, one side of the copper plate, which is far away from the steel plate, is provided with a plurality of second reinforcing ribs, the second reinforcing ribs are positioned inside the closed structure and are perpendicular to the extending direction of each water channel, and the second reinforcing ribs are connected with the first reinforcing ribs.
Furthermore, the second reinforcing rib is provided with a gap matched with the water tank cover, and the second reinforcing rib is also connected with the water tank cover.
The utility model provides a blast furnace stave's beneficial effect lies in, through setting up the basin of welding the water course lid on the steel sheet and seting up in steel sheet one side to this encloses jointly and closes and form the water course, and through setting up the water course lid into convex lid, increase the water cross sectional area of water course under the condition of not increasing steel sheet and copper thickness excessively, so that blast furnace stave reaches predetermined cooling effect, reduces the volume and the weight of blast furnace stave, reduction manufacturing cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for manufacturing a blast furnace stave according to an embodiment of the present invention;
FIG. 2 is a schematic view showing arrangement of copper plates and steel plates before explosion welding in a method of manufacturing a blast furnace stave according to an embodiment of the present invention;
FIG. 3 is a schematic view of a cooling wall of a blast furnace according to an embodiment of the present invention;
fig. 4 is a sectional view at a in fig. 3.
In the figure: 1. a steel plate; 2. a copper plate; 3. a water passage cover; 4. a water pipe; 5. an outer casing; 6. an inner casing; 7. a first reinforcing rib; 8. a second reinforcing rib; 9. grooving; 10. a butter buffer layer; 11. a explosive layer; 12. a spacer bracket; 13. and (5) foundation construction.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 3 to 4, a blast furnace stave according to the present invention will now be described. The blast furnace cooling wall comprises a cooling wall body, wherein the cooling wall body is a copper-steel composite plate component. One side of the copper plate 2 of the copper-steel composite plate component is close to the inner side of the blast furnace, and one side of the steel plate 1 of the copper-steel composite plate component is arranged on the wall of the blast furnace.
The blast furnace cooling wall also comprises a water channel cover 3 and a water pipe 4, one side of the steel plate 1, which is far away from the copper plate 2, is provided with a water channel, the water channel cover 3 is covered on the open end of the water channel and is hermetically connected with the steel plate 1, and the water channel cover 3 and the water channel are enclosed to form a water channel. The water channel cover 3 is a convex cover body protruding towards one side far away from the copper plate 2, and can be a convex arc-shaped cover body or a convex square-shaped cover body, so as to increase the cross-sectional area of the water channel, that is, the cooling water in the water channel can be positioned in the water channel or in the area enclosed by the water channel cover 3. The water pipe 4 is used for communicating the external cooler with the water channel, and the water pipe is connected with the water channel cover 3.
Therefore, the water channel formed by the water channel cover 3 and the water channel in a surrounding mode can increase the water passing sectional area of the water channel under the condition that the thickness of the steel plate 1 is not excessively increased, so that the thickness of the steel plate 1 is reduced, the size and the weight of the whole copper-steel composite plate are reduced, and the manufacturing cost is reduced.
The embodiment of the utility model provides a blast furnace stave, compared with the prior art, through setting up the basin of welding the water course lid on the steel sheet and seting up in steel sheet one side to this encloses jointly and closes and form the water course, and through setting up the water course lid into the convex lid, increase the water cross sectional area of water course under the condition of not excessively increasing steel sheet and copper thickness, so that blast furnace stave reaches predetermined cooling effect, reduce the volume and the weight of blast furnace stave, reduce manufacturing cost.
Referring to fig. 3 to 4, in an embodiment of the cooling stave of the blast furnace of the present invention, the water tank extends to the copper plate 2 along a depth direction to enhance a cooling effect of the copper plate 2.
As a specific example of the blast furnace stave provided by the present invention, the depth range of the water tank extending to the copper plate 2 is 5mm to 15 mm. The basin stretches into copper 2 one side and helps the heat transfer of water course and copper 2, but the basin should not stretch into copper 2 one side too deeply to avoid transition to detract from the intensity of copper 2.
Referring to fig. 3 to 4, in an embodiment of the cooling wall of the blast furnace of the present invention, the water tank has a rectangular tank structure, and the water channel cover 3 is a convex arc-shaped cover body protruding toward one side away from the copper plate 2.
Referring to fig. 3 to 4, in an embodiment of the cooling wall of the blast furnace of the present invention, the water channel cover 3 is a semi-circular pipe type cover body, and the diameter of the water channel cover 3 is equal to the width of the water tank. The groove is a rectangular groove, so that the groove bottom is flat, the water passing cross section area is increased as much as possible (compared with the grooves with other shapes) under the condition that the water groove is not deep into the copper plate 2, and meanwhile, the semicircular pipe type water channel cover 3 encloses to form a larger water passing cross section area under the condition that the material of the water channel cover 3 is saved.
Please refer to fig. 3 to 4, which are specific embodiments of the present invention, the present invention provides a cooling wall for a blast furnace, which further includes a sleeve assembly, the sleeve assembly includes an inner sleeve 6 disposed outside the water pipe 4 and an outer sleeve 5 disposed outside the inner sleeve 6, and the inner sleeve 6 and the outer sleeve 5 are respectively connected to the water channel cover 3.
As the blast furnace cooling wall is finally installed on the blast furnace, the water pipe 4 needs to pass through a through hole on the blast furnace wall to be communicated with an external cooler, the temperature of the blast furnace wall is extremely high, the water pipe 4 is in direct contact with the blast furnace wall, the water pipe 4 and the joint of the water pipe 4 and the water channel cover 3 are likely to be damaged at high temperature, and a sleeve pipe assembly is additionally arranged outside the water pipe 4 to avoid the direct contact of the water pipe 4 and the blast furnace wall. Meanwhile, the sleeve assembly can avoid cracking and water leakage caused by the influence of thermal shock on the cooling wall in the working process.
As a specific example of the blast furnace stave provided by the utility model, the clearance has between inboard sleeve pipe 6 and water pipe 4, the clearance has between outside sleeve pipe 5 and the inboard sleeve pipe 6, the clearance has between inlayer sleeve pipe 6 and the water pipe 4, the clearance has between outer sleeve pipe 5 and the inlayer sleeve pipe 6, can make the isolated blast furnace oven of water pipe 4 to the extrusion pressure and the high temperature of water pipe 4 better.
Referring to fig. 3, as a specific embodiment of the cooling wall of the blast furnace provided by the present invention, a slot 9 is formed on one side of the copper plate 2 away from the steel plate 1, a refractory material is installed in the slot 9, and the distance between the bottom of the slot 9 and the bottom of the water tank is greater than 20 mm. The refractory material can effectively reduce the high-temperature damage of the cooling wall of the blast furnace, and the interval between the bottom of the open groove 9 and the bottom of the water groove is more than 20mm so as to avoid the strength of the copper plate 2 from being reduced by transition.
As a specific example of the blast furnace stave provided by the present invention, the refractory material is a refractory brick or a refractory coating material coated in the slot 9.
Referring to fig. 3, as an embodiment of the cooling wall of the blast furnace provided by the present invention, a plurality of first reinforcing ribs 7 are disposed on one side of the copper plate 2 away from the steel plate 1, and each first reinforcing rib 7 is connected to the edge of the steel plate 1 in an end-to-end closed structure.
Referring to fig. 3, as an embodiment of the cooling wall of the blast furnace provided by the present invention, a plurality of second reinforcing ribs 8 are disposed on one side of the copper plate 2 away from the steel plate 1, and the second reinforcing ribs 8 are disposed inside the closed structure and perpendicular to the extending direction of each water channel. The second reinforcing bead 8 is connected to the first reinforcing bead 7. The first reinforcing ribs 7 and the second reinforcing ribs 8 can effectively enhance the strength and rigidity of the blast furnace cooling wall.
Referring to fig. 3, as an embodiment of the cooling stave of the present invention, the second rib 8 is provided with a notch adapted to the water tank cover 3, and the second rib 8 is further connected to the water tank cover 3 to further enhance the rigidity of the cooling stave body.
Referring to fig. 1 to 4, the present invention further provides a method for manufacturing a cooling wall of a blast furnace, which corresponds to the above-mentioned cooling wall of a blast furnace. Now, a method for manufacturing a blast furnace stave according to the present invention will be described. Fig. 1 shows a flow of implementation of a method for manufacturing a blast furnace stave according to an embodiment of the present invention, which is detailed as follows:
in step S100, an operation of manufacturing a copper-steel composite plate is performed, which mainly includes obtaining a steel plate 1 and a copper plate 2, and connecting the steel plate 1 and the copper plate 2 to obtain the copper-steel composite plate.
In step S200, a waterway manufacturing operation is performed. S200, the water channel manufacturing method specifically comprises the following steps:
s210, a water tank is arranged on one side of the steel plate 1 of the copper-steel composite plate. One side of the steel plate 1 is the cold side of the blast furnace cooling wall, and one side of the copper plate 2 is the hot side of the blast furnace cooling wall.
S220, a water channel cover 3 is obtained, where the water channel cover 3 is a convex cover body protruding toward a side away from the copper plate 2, and may be a convex arc cover body or a convex square cover body, so as to increase a water passing area.
S230, the water channel cover 3 is welded with the steel plate 1, so that the water channel is enclosed by the water tank and the water channel cover 3 to form a water channel.
The water channel formed by enclosing in this way can increase the cross-sectional area of the water channel without excessively increasing the thickness of the steel plate 1, thereby reducing the thickness of the steel plate 1, further reducing the volume and weight of the whole copper-steel composite plate and reducing the manufacturing cost.
In step S300, the water pipe 4 is welded. In step S300, after the water pipe 4 is welded, the water pipe 4 is connected to the water channel, and the water pipe 4 is used to connect an external cooler to the water channel, so that the coolant in the cooler can be supplied to the water channel through the water pipe 4.
In step S800, a water pressure test operation is performed: and (4) injecting water into the prepared water channel (after the water pipe 4 is welded) and maintaining pressure to test the tightness of the water channel. And if the tightness of the water channel does not meet the tightness, judging that the water channel is unqualified and needing to be repaired or scrapped.
According to the above embodiment, the embodiment of the utility model provides a manufacturing approach of blast furnace stave makes the water course lid of welding on the steel sheet and the basin of seting up in steel sheet one side enclose jointly and closes and form the water course to through setting up the water course lid into the convex lid, increase the water cross sectional area of water course under the condition of not excessively increasing steel sheet and copper thickness, so that the blast furnace stave reaches predetermined cooling effect, reduces the volume and the weight of blast furnace stave, reduction in manufacturing cost.
As a specific embodiment of the manufacturing method of the blast furnace cooling stave provided by the utility model, the step S100 of manufacturing the copper-steel composite plate specifically comprises the steps of S110 obtaining a copper plate 2 and a steel plate 1; and S120, manufacturing and obtaining the copper-steel composite plate by using the copper plate 2 as a base plate and the steel plate 1 as a composite plate through an explosive welding mode. The welded connection of copper 2 and steel sheet 1 can be realized to explosive welding, and the copper steel composite sheet mechanical properties after the explosive welding is better, and explosive welding's welding process is fast moreover, efficient, can make copper steel composite sheet with copper 2 and steel sheet 1 fast. The explosion welding can be metal welding compounding which can rapidly realize the great difference of two or more materials, is hardly limited by performance parameters such as melting point, strength, thermal expansion coefficient and the like of the materials, has very short action time and rapid temperature change of the materials in the explosion welding process, and does not generate interface reaction. One side of the steel plate 1 is the cold side of the blast furnace cooling wall, and one side of the copper plate 2 is the hot side of the blast furnace cooling wall.
Referring to fig. 3 to 4, as a specific example of the method for manufacturing the blast furnace stave according to the present invention, the step S210 of forming a water tank on one side of the steel plate 1 of the copper-steel composite plate specifically includes:
s211, milling a water tank on one side of a steel plate 1 of the copper-steel composite plate, wherein the water tank is of a rectangular groove structure with an opening at the upper end, and the lower end of the water tank extends downwards to the copper plate 2 (layer), so that cooling liquid in the water tank can directly exchange heat with the copper plate 2 for cooling, and the cooling effect of a cooling wall of the blast furnace is improved; certainly, the lower end of the water tank cannot penetrate into one side of the copper plate 2 too deeply, otherwise, the wall of the water channel is easy to crack due to the overhigh temperature of the copper plate 2. Moreover, the lower end of the water tank cannot penetrate into one side of the copper plate 2 too deeply, and the copper plate 2 cannot be guaranteed to have certain strength.
S212, polishing the inner wall of the water tank, wherein the roughness of the inner wall surface of the water tank is less than Ra6.3, so that the resistance of the cooling liquid in the water channel is reduced.
As a specific example of the manufacturing method of the blast furnace stave provided in the present invention, when the water tank is milled on the steel plate 1 side of the copper-steel composite plate in step S211, the conventional milling cutter is first used to keep the low speed to open the groove on the steel plate 1, and the groove depth is reached until the copper-steel composite layer interface. And after entering the copper layer, replacing a fly cutter or an alloy cutter to keep high-speed grooving, wherein the grooving width is kept smaller than the grooving width of the steel plate, namely, a space for rounding off is reserved.
Referring to fig. 3 to 4, as an embodiment of the method for manufacturing the cooling wall of the blast furnace of the present invention, the step S220 obtains the water channel cover 3, and the water channel cover 3 is a convex cover body protruding toward the side far away from the copper plate 2, and specifically includes: a semicircular pipe type waterway cover 3 is obtained, and the diameter of the waterway cover 3 is equal to the width of the water tank (the extending direction and the depth direction of the non-water tank). The water channel is a rectangular groove, so that the bottom of the water channel is flat, the water cross-sectional area of the water channel is increased as much as possible (compared with the grooves with other shapes) under the condition that the water channel is not deep into the copper plate 2, and meanwhile, the semicircular pipe type water channel cover 3 encloses and forms a larger water cross-sectional area under the condition that the material of the water channel cover 3 is saved.
Step S230 is to weld the water channel cover 3 to the steel plate 1, so that the water channel and the water channel cover enclose to form a water channel specifically includes: the water channel cover 3 is covered above the water channel (on one side of the opening), and the water channel cover 3 is connected with the steel plate 1 in a sealing welding mode, so that the water channel and the water channel cover 3 are enclosed to form a water channel. It should be understood that the two ends of the waterway cover 3 are necessarily provided with blocking structures or are welded and blocked with some structures on the copper-steel composite plate, so that the waterway is relatively closed and does not leak the cooling liquid.
As a specific example of the manufacturing method of the cooling stave of the blast furnace provided by the present invention, the step S221 of obtaining the waterway cover 3 of the semicircular pipe type specifically includes:
obtaining a circular tube;
the circular tube is cut in the axial direction thereof to obtain two semicircular tube-shaped waterway covers 3.
The semicircular pipe type waterway cover 3 can be obtained by cutting a standard circular pipe so as to reduce the manufacturing cost of the waterway cover 3.
As a specific example of the manufacturing method of the cooling wall of the blast furnace provided by the present invention, the water channel cover 3 is made of the same material as the steel plate 1, so as to facilitate welding.
As a specific example of the manufacturing method of the cooling stave of the blast furnace provided by the present invention, the step S221 of obtaining the semicircular pipe type of the water passage cover further includes:
the two ends of the water channel cover 3 in the axial direction are respectively provided with a communicating port so as to facilitate the conduction of the water channel and the water pipe 4, and the connecting port is positioned on the arc-shaped outer wall of the water channel cover 3. The water pipe 4 is connected with the water channel cover 3 in a welding mode, and the communication opening is communicated with the water pipe 4. The step of opening the communication port may be located after the circular tube is cut or before the circular tube is cut.
As a specific example of the manufacturing method of the cooling wall of the blast furnace provided by the present invention, the water pipe 4 and the water channel cover 3 are made of the same material so as to facilitate welding.
As a specific example of the manufacturing method of the cooling stave of the blast furnace provided by the present invention, the step S221 of obtaining the semicircular pipe type of the water passage cover further includes:
the inner wall of the waterway cover 3 is polished to have a surface roughness of Ra6.3 or less of the inner wall of the waterway cover 3, to reduce the resistance of the coolant in the waterway. This step should be performed after the step of opening the communication port.
Referring to fig. 3 to 4, as a specific embodiment of the method for manufacturing a cooling wall of a blast furnace provided by the present invention, the method for manufacturing a cooling wall of a blast furnace further includes a step S400 of welding the sleeve assembly, the step S400 of welding the sleeve assembly is performed after the step S300 of welding the water pipe, of course, the step S400 of welding the sleeve assembly may be performed before or after the step 700 of water pressure testing, these two steps are not affected by each other, and generally, we adopt the step S400 of welding the sleeve assembly to be performed immediately after the step S300 of welding the water pipe. Step S400 of welding the sleeve assembly specifically includes the following operations:
s410, obtaining an outer-layer sleeve 5 and an inner-layer sleeve 6;
s420, the outer-layer sleeve 5 and the inner-layer sleeve 6 are connected with the water channel cover 3 in a welded mode respectively, the inner-layer sleeve 6 is wrapped on the outer side of the water pipe 4, the outer-layer sleeve 5 is wrapped on the outer side of the inner-layer water pipe 6, a gap is formed between the inner-layer sleeve 6 and the water pipe 4, and a gap is formed between the outer-layer sleeve 5 and the inner-layer sleeve 6.
Because the blast furnace stave is installed on the blast furnace at last, water pipe 4 need pass the perforation on the blast furnace wall and come to communicate with the cooler of peripheral hardware, blast furnace wall temperature is high, water pipe 4 is in blast furnace wall direct contact, probably can make water pipe 4 and the junction high temperature damage of water course lid 3, consequently increase the thimble subassembly in the water pipe 4 outside, with avoid water pipe 4 and blast furnace wall direct contact, the clearance has between inlayer sleeve 6 and the water pipe 4 simultaneously, the clearance has between skin sleeve 5 and the inlayer sleeve 6, can make the high temperature of water pipe 4 isolated blast furnace wall better. Meanwhile, the sleeve assembly can avoid cracking and water leakage caused by the influence of thermal shock on the cooling wall in the working process.
As a specific example of the manufacturing method of the blast furnace stave provided by the present invention, the depth range of the water tank extending to the copper plate 2 is 5mm to 15 mm. The basin stretches into copper 2 one side and helps the heat transfer of water course and copper 2, but the basin should not stretch into copper 2 one side too deeply to avoid transition to detract from the intensity of copper 2.
Referring to fig. 3 to 4, as a specific embodiment of the method for manufacturing a cooling stave of a blast furnace provided by the present invention, the method for manufacturing a cooling stave of a blast furnace provided by the embodiment of the present invention further comprises a step S1000 of milling the slot 9 and installing a refractory material. The step S1000 of milling the groove and installing the refractory material specifically comprises the following steps:
milling a slot 9 on one side of the copper plate 2 far away from the steel plate 1, wherein the interval between the bottom of the slot 9 and the bottom of the water tank is more than 20 mm;
a refractory material is obtained and installed in the slot 9.
The refractory material can effectively reduce the high-temperature damage of the cooling wall of the blast furnace, and the interval between the bottom of the open groove 9 and the bottom of the water groove is more than 20mm so as to avoid the strength of the copper plate 2 from being reduced by transition.
As a specific example of the method for manufacturing the cooling stave of the blast furnace of the present invention, the refractory material is a refractory brick or a refractory coating material coated in the open groove 9.
Referring to fig. 3, as an embodiment of the method for manufacturing the cooling stave of the blast furnace of the present invention, the water passage has a plurality of parallel water passages arranged at intervals, and the extending direction of the water passage is perpendicular to the extending direction of the slot 9.
Referring to fig. 3, as a specific embodiment of the method for manufacturing a cooling stave of a blast furnace provided by the present invention, the method for manufacturing a cooling stave of a blast furnace provided by an embodiment of the present invention further includes a step S900 of welding the reinforcing rib, and the step S900 of welding the reinforcing rib includes:
obtaining a plurality of first reinforcing ribs 7, welding each first reinforcing rib 7 on one side surface of the steel plate 1 far away from the copper plate 2, and connecting each first reinforcing rib 7 to the edge of the steel plate 1 in a closed structure in a tail-ending connection manner;
and obtaining a plurality of second reinforcing ribs 8, welding each second reinforcing rib 8 on one side surface of the steel plate 1 far away from the copper plate 2 in parallel and at intervals, wherein each second reinforcing rib 8 is positioned in the closed structure and is perpendicular to the extending direction of each water channel.
The first reinforcing ribs 7 and the second reinforcing ribs 8 can effectively enhance the strength and rigidity of the blast furnace cooling wall.
As a specific embodiment of the manufacturing method of the blast furnace stave provided by the utility model, the second strengthening rib 8 is provided with the opening matched with the water channel cover 3, and the second strengthening rib 8 is welded with the water channel cover 3 to strengthen the connection rigidity of the whole blast furnace stave.
As a specific example of the manufacturing method of the blast furnace stave provided in the present invention, an arc transition structure is provided between the vertical wall of the water tank and the surface of the steel plate 1, and an arc transition structure is provided between the vertical wall of the water tank and the bottom of the water tank. The optimized design of the circular arc transition structure can reduce the cooling dead zone and enhance the heat transfer effect.
As a specific example of the manufacturing method of the cooling wall of the blast furnace provided by the present invention, the step S800 is a hydraulic pressure test: carry out water injection and pressurize to the water course to the leakproofness of test water course specifically includes:
s810, sealing one end of the water channel;
s820, injecting water from the other end of the water channel to enable the water pressure in the water channel to reach 2.0 Mpa;
s830, closing the water injection end of the water channel and keeping the water channel in a closed state for 3 hours;
s840, if the water pressure of the water channel can be kept above 1.9Mpa within 3 hours of the water channel being kept in a closed state, judging that the water channel is qualified in sealing property; otherwise, judging that the water channel sealing performance is unqualified, and repairing or scrapping the cooling wall of the blast furnace.
As a specific embodiment of the present invention, the present invention provides a method for manufacturing a cooling wall of a blast furnace, which further comprises a step S500 of annealing, wherein the step S500 of annealing is performed after the step S400 of welding the sleeve assembly. The annealing treatment in step S500 specifically includes:
and annealing the copper-steel composite plate, wherein the annealing temperature is controlled to be 400-600 ℃, and the annealing time is controlled to be 8.5-11 h.
Since the welding operation in the steps of manufacturing the water channel in the step S300 and welding the sleeve assembly in the step S400 may generate a large stress on the cooling wall of the blast furnace, the annealing process in the step S500 is performed to help the cooling wall of the blast furnace to release the stress rapidly.
As a specific embodiment of the manufacturing method of the blast furnace stave provided in the present invention, the embodiment of the present invention provides a manufacturing method of a blast furnace stave further comprising the operation of leveling the cover 3 in step S600, wherein the leveling the cover 3 in step S600 specifically comprises: the height of the waterway cover 3 at the side far from the steel plate 1 is leveled.
As a specific embodiment of the manufacturing method of the blast furnace cooling wall provided by the utility model, the copper plate 2 is a TU1 oxygen-free copper plate, in order to ensure the rigidity of the cooling wall and meet the requirement that the cooling wall still does not deform or damage under the conditions of high temperature and large pressure, the steel plate 1 is a Q345R low-alloy high-strength steel plate, and the thickness value range of the copper plate 2 is 50mm-70 mm; the thickness of the steel plate 1 ranges from 20mm to 30 mm. The copper-steel composite plate with good mechanical property can be obtained by explosion welding of the TU1 oxygen-free copper plate and the Q345R low-alloy high-strength steel plate, the TU1 oxygen-free copper plate is low in impurity element content and excellent in heat conduction property, the heat efficiency can be enhanced, and hydrogen embrittlement and the like caused by overhigh temperature in the blast furnace can be avoided. Meanwhile, the thickness range of the TU1 oxygen-free copper plate is 50-70 mm through measurement and calculation, and the thickness range of the Q345R low-alloy high-strength steel plate is 20-30mm, so that the heat dissipation and strength performance of the cooling wall of the blast furnace can be met.
Referring to fig. 2, as an embodiment of the method for manufacturing a cooling stave of a blast furnace according to the present invention, the step S120 of manufacturing and obtaining the copper-steel composite plate by using the copper plate 2 as a base plate and the steel plate 1 as a composite plate through an explosive welding method specifically includes:
s121, the welded surface of the copper plate 2 is placed on an explosive foundation in a flat mode, and the explosive foundation is preferably a flat foundation 13.
S122, the welded surface of the steel plate 1 faces downward and is parallel to the copper plate 2 at a distance, so that a gap is formed between the steel plate 1 and the copper plate 2. In the present embodiment, the steel plates 1 and the copper plates 2 are not disposed at a regular inclination, but the steel plates 1 and the copper plates 2 are disposed in parallel, so that the connection performance of the steel plates 1 and the copper plates 2 welded in a wide range can be kept consistent everywhere after welding.
S123 the butter buffer layer 10 and the explosive layer 11 are laid in sequence in the region to be exploded on the upper surface of the steel plate 1 respectively, the butter buffer layer 10 is tightly attached to the upper surface of the steel plate 1, the explosive layer 11 is located on the upper portion of the butter buffer layer 10, and the butter buffer layer 10 can prevent the explosive force and the thermal reaction of the explosive layer 11 from damaging the upper surface of the steel plate 1.
And S124, arranging detonators on the upper part of the explosive layer 1.
S125, detonating the detonator, and connecting the copper plate 1 and the steel plate 2 by using the reaction and acting force of explosive welding to obtain the copper-steel composite plate. After the explosive is detonated, chemical energy instantaneously released can generate certain high pressure (up to 700MPa) and high temperature (locally up to 3000 ℃), impact force generated by energy waves enables the composite plate to fly downwards and violently collide with the substrate, and a contact interface generates jet flow at a collision point. The jet flow generates scouring action on the surface of the plate, and can remove an oxide film, impurities and the like on the surface, so that the clean surface forms metal bond combination. And (3) continuously moving the bonding transition layer forwards along with the continuous consumption of the explosive to form a continuous bonding transition layer so as to finish the compounding.
Referring to fig. 2, as an embodiment of the method for manufacturing a cooling stave of a blast furnace according to the present invention, the step S122 of disposing the welded surface of the steel plate 1 facing downward and in parallel with the copper plate 2 at an interval specifically includes:
acquiring four spacing brackets 12;
placing four spacing brackets 12 at the four corners of the copper plate 2;
the welded surface of the steel plate 1 faces downwards and is arranged in parallel with the copper plate 2 at intervals by means of the interval supports 12, the copper plate 2 and the steel plate 1 are rectangular plate bodies, the four interval supports 12 with the same size are placed at four corners of the copper plate 2, and the four corners are also places where the copper plate 2 cannot be subjected to explosive welding with the steel plate 1. The steel plate 1 is placed on the spacer bracket 12 to achieve a parallel spaced arrangement of the copper plate 2 and the steel plate 1. The explosive layer 11 is not coated on the steel plate 1 at the positions (four corners) corresponding to the spacing brackets 12, and the grease cushioning layer 10 and the explosive layer 11 are coated on the middle position of the steel plate 1.
Referring to fig. 2, as an embodiment of the method for manufacturing a cooling stave of a blast furnace according to the present invention, the spacer 12 is a W-bent plate structure. The W-shaped bent plate structure is a bent structure formed by bending or stamping a plate, and the upper part and the lower part of the W-shaped bent plate structure are ground into planes. Since the interval between the copper plate 2 and the steel plate 1 may be in the order of millimeters, a large support block cannot satisfy the interval in the order of millimeters, and may not be strong enough to support the steel plate 1 without bending.
As a specific example of the manufacturing method of the blast furnace stave provided by the present invention, according to the measurement and calculation, in order to obtain a better explosive welding effect, the value range of the interval h between the copper plate 2 and the steel plate 1 is 3mm to 7 mm.
As a specific example of the manufacturing method of the cooling wall of the blast furnace provided by the present invention, according to the measurement and calculation, the thickness range of the butter cushioning layer 10 is 0.5mm to 1.5mm in order to obtain better explosive welding effect.
As an embodiment of the method for manufacturing a blast furnace stave according to the present invention, in order to obtain a better explosive welding effect according to the measurement and calculation, the composition of the explosive layer 11 is a powdery emulsion explosive, and the charge amount of the explosive layer 11 is 2.0g cm-2-3.0g·cm-2The explosive layer 11 has a charge density of 0.8g cm-3-1.2g·cm-3。
As a specific embodiment of the method for manufacturing the blast furnace stave, the detonation velocity of the explosive is usually very high, and a density regulator is required to be added to control the explosive velocity, in this embodiment, the detonation velocity is controlled by adding a certain amount of sodium chloride on the basis of the powdery emulsion explosive. Drying and sieving the emulsion explosive, adding 10-30% (mass ratio) of sodium chloride, fully mixing, and uniformly stirring to obtain the more optimized components of the explosive layer 11.
As a specific example of the manufacturing method of the blast furnace stave provided in the present invention, the prepared explosive is placed on the butter buffer layer 10 when laying the explosive layer 11 in the butter buffer layer 10 and the explosive layer 11 respectively laid in sequence in the region to be exploded of the upper surface of the steel plate 1 in step S123, and is scraped with the stuff, thereby ensuring the consistency of the explosive thickness as much as possible, and fixing the explosive with the explosive frame made of kraft paper, thereby playing the role of restraining the explosive.
As a specific example of the manufacturing method of the blast furnace stave provided in the present invention, step S125 detonates the detonator, and the copper plate 2 and the steel plate 1 are welded by explosion, and the copper-steel composite plate is obtained by:
detonating a detonator, and welding the copper plate 2 and the steel plate 1 by explosion to obtain a first-grade copper-steel composite plate; it should be noted that, since the corners (for example, the spacing brackets 12) of the first-stage copper-steel composite plate after explosion welding are not welded, the first-stage copper-steel composite plate cannot be directly used for the step S200 to manufacture the water channel;
cutting one-level copper steel composite board, obtaining the copper steel composite board of predetermineeing the size, the cutting here except cutting the corner, it is great that one-level copper steel composite board size still can be, and the composite board size that explosive welding once obtained is greater than a copper steel composite board size, can obtain polylith copper steel composite board after the cutting.
As a specific example of the manufacturing method of the cooling wall of the blast furnace provided by the present invention, the manufacturing method of the cooling wall of the blast furnace provided by the embodiment of the present invention further includes step S700 of performing nondestructive inspection on the (welded) copper-steel composite plate. Step S700 of performing nondestructive inspection on the (welded) copper-steel composite plate is performed after leveling the water channel cover and before the water pressure test of step S800.
Step S700, the nondestructive inspection of the copper-steel composite plate specifically comprises the following steps:
s710 obtains the comparative sample and the attenuation coefficient of the comparative sample, where the attenuation coefficient of the comparative sample is also obtained through data analysis of nondestructive inspection, and the obtaining of the attenuation coefficient of the comparative sample belongs to the prior art and is not described herein again.
S720, carrying out ultrasonic detection on the copper-steel composite plate and obtaining the attenuation coefficient of the copper-steel composite plate.
S730, scanning and detecting the flaw of one side of the copper plate 2 of the copper-steel composite plate to obtain the defect condition of scanning and detecting the flaw.
S740, comparing the attenuation coefficient of the comparative sample with the attenuation coefficient of the copper-steel composite plate, and if the attenuation coefficient of the copper-steel composite plate and the attenuation coefficient of the comparative sample are out of the range of 0.9-1.1, judging that the copper-steel composite plate is unqualified; and if the defect condition of scanning flaw detection does not meet the expected condition, judging that the copper-steel composite plate is unqualified, and repairing or scrapping the unqualified copper-steel composite plate. And the qualification of the copper-steel composite plate can be judged only if the attenuation coefficient of the copper-steel composite plate and the attenuation coefficient of the comparative sample are within the range of 0.9-1.1 and the defect condition of scanning flaw detection is in accordance with the expected condition. And if the copper-steel composite plate is unqualified, repairing the copper-steel composite plate until the copper-steel composite plate is qualified.
As a specific embodiment of the manufacturing method of the blast furnace cooling stave provided by the utility model, the copper plate with the same thickness as the copper-steel composite plate is adopted as the comparison sample.
As a specific embodiment of the manufacturing method of the cooling wall of the blast furnace provided by the utility model, the flaw detector of the embodiment uses an A-type display pulse reflection type flaw detector, the working frequency is at least 2.5-5 MHz, and the used longitudinal wave straight probe is in the range of 8-20 mm.
As a specific example of the manufacturing method of the cooling wall of the blast furnace provided by the present invention, the defect conditions include: the projected area between the water troughs (projected area of the area between the water troughs projected to the hot surface side of the copper plate) or the projected area between the water troughs and the edge of the copper plate 2 per m2The number of point defects smaller than 8mm in the workpiece solid and whether the copper plate 2 has defects such as inclusion, interlayer, looseness, cracks and the like. The expected situation is every m in the projected area between the water troughs or between the water trough and the edge of the copper slab 22The number of the point defects smaller than 8mm in the workpiece solid is less than or equal to 8, and the copper plate 2 has no defects such as inclusion, interlayer, looseness, cracks and the like. The condition that the scanning flaw detection defect conditions meet the expected conditions refers to that every m in the projection area between the water tanks or the projection area between the water tanks and the edge of the copper plate 22The number of the point defects smaller than 8mm in the workpiece solid is less than or equal to 8, and the copper plate 2 has no defects such as inclusion, interlayer, looseness, cracks and the like. The condition that the scanning flaw detection is not expected is that the projection area between the water tanks or the projection area between the water tank and the edge of the copper plate 2 is every m2The number of the point defects smaller than 8mm in the workpiece solid is larger than 8, or the copper plate 2 has defects of inclusion, interlayer, looseness, cracks and the like.
As a specific embodiment of the manufacturing method of the cooling wall of the blast furnace provided by the present invention, the optimized sequence operations of the steps in the manufacturing method of the cooling wall of the blast furnace provided by the embodiment of the present invention are:
s100, manufacturing a copper-steel composite plate;
s200, manufacturing a water channel;
s300, welding a water pipe;
s400, welding a sleeve assembly;
s500, annealing treatment;
s600 leveling the water channel cover;
s700, carrying out nondestructive inspection on the copper-steel composite plate;
s800, testing water pressure;
s900, welding reinforcing ribs;
s1000, milling and grooving and installing refractory materials.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The blast furnace cooling wall comprises a cooling wall body and is characterized in that the cooling wall body is a copper-steel composite plate component, one side of a copper plate of the copper-steel composite plate component is close to the inner side of a blast furnace, and one side of a steel plate of the copper-steel composite plate component is arranged on the wall of the blast furnace;
the blast furnace cooling wall also comprises a water channel cover, a water tank is arranged on one side of the steel plate, which is far away from the copper plate, and the water channel cover is a convex cover body which is convex towards one side, which is far away from the copper plate; the water channel cover is arranged at the opening end of the water channel and is hermetically connected with the steel plate, the water channel cover and the water channel are enclosed to form a water channel,
the blast furnace cooling wall also comprises a water pipe for communicating an external cooler with the water channel, and the water pipe is connected with the water channel cover.
2. The blast furnace stave of claim 1 wherein the water trough extends depthwise to the copper plate to enhance cooling of the copper plate.
3. The blast furnace stave of claim 2 wherein the water tank has a rectangular tank structure and the water passage cover is a convex arc-shaped cover projecting toward a side away from the copper plate.
4. The blast furnace stave of claim 3 wherein the water channel cover is a semi-circular pipe type cover having a diameter equal to a width of the water tank.
5. The blast furnace stave of any one of claims 1 to 4 further comprising a sleeve assembly comprising an inner sleeve disposed outside the water pipe and an outer sleeve disposed outside the inner sleeve, the inner sleeve and the outer sleeve being connected to the waterway cover, respectively.
6. The blast furnace stave of claim 5 wherein the inner sleeve has a gap with the water pipe and the outer sleeve has a gap with the inner sleeve.
7. The blast furnace stave of any one of claims 1 to 4 wherein the copper plate is provided with a slot on a side thereof remote from the steel plate, the slot having a refractory material disposed therein, the slot having a bottom spaced from the bottom of the water bath by more than 20 mm.
8. The blast furnace stave according to any one of claims 1 to 4 wherein the side of the copper plate remote from the steel plate is provided with a plurality of first ribs, each of the first ribs being connected to the edge of the steel plate in an end-to-end closed configuration.
9. The blast furnace stave according to claim 8 wherein the copper plate on a side thereof remote from the steel plate is provided with a plurality of second ribs, the second ribs being positioned within the closed structure and being arranged perpendicular to the direction of extension of the water passages, the second ribs being connected to the first ribs.
10. The blast furnace stave of claim 9 wherein the second ribs have notches adapted to the trough cover, the second ribs further connected to the trough cover.
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| CN112779375A (en) * | 2020-12-25 | 2021-05-11 | 河北万丰冶金备件有限公司 | Blast furnace cooling wall |
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| CN112779375A (en) * | 2020-12-25 | 2021-05-11 | 河北万丰冶金备件有限公司 | Blast furnace cooling wall |
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Denomination of utility model: blast furnace stave Effective date of registration: 20220824 Granted publication date: 20210917 Pledgee: China Construction Bank Corporation Zhangjiakou Xihuan Sub-branch Pledgor: HEBEI WANFENG METALLURGICAL SPARE PARTS Co.,Ltd. Registration number: Y2022980013496 |