Refractory repairing device for arch top material distribution port of o-yuki gasifier and repairing method thereof

Abstract

The application discloses a kind of cupola gasification furnace arch top material distribution port refractory repair device and its repair method, after folding, the blanking plate is stretched into gasification furnace from distribution port, and the blanking plate is attached on distribution port;The pull bar on the lifting lug is welded on the inner wall of distribution port;The isolation cylinder is welded on blanking plate respectively;Use ceramic fiber cotton to seal the gap;Use high-temperature ceramic refractory in molten state to pour the pouring space between isolation cylinder and the inner wall of distribution port;After ceramic refractory solidification, burn the connecting point between isolation cylinder and blanking plate, and remove the isolation cylinder;Cut off the central part of first bottom plate and second bottom plate, complete the refractory repair of distribution port;The application can complete the repair work of distribution port within a few hours, greatly shorten the cycle of distribution port repair work, shorten the time of wind stop and shutdown, and relatively improve production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of top of European smelting furnace gasification furnace arch material repairing device and its repairing method. BACKGROUND

[0002] European smelting furnace is divided into gasification furnace and shaft furnace two parts, effective volume is 3000m 3, European smelting furnace arch cloth mouth due to cloth process friction cloth mouth inner wall, cause the inner wall of cloth mouth refractory to fall off, after falling off, repair needs high-altitude support and platform, high-altitude support and platform build long time, applicable to large quantities of repair, not suitable for local repair, can not quickly complete refractory falling repair work, and there is certain security risk to build high-altitude support and platform to repair work. SUMMARY

[0003] The present application provides a kind of top of European smelting furnace gasification furnace arch material repairing device and its repairing method, to solve the problem of refractory time-consuming of present repair gas furnace arch top cloth mouth, there is security risk.

[0004] To solve the above problems, the present application is realized by the following scheme:

[0005] A kind of top of European smelting furnace gasification furnace arch material repairing device, including the plugging plate for plugging cloth mouth, the plugging plate is provided with a plurality of lug along the circumference of plugging plate outer edge distribution, each described lug is provided with pull bar, the free end of each described pull bar is fixed with the inner wall of cloth mouth, plugging plate is provided with isolation cylinder, the pouring space for pouring refractory is formed between the inner wall of cloth mouth of isolation cylinder, the pouring space is filled with high-temperature ceramic refractory.

[0006] Further, the plugging plate includes inner plate, outer plate and connecting block, the connecting block is fixed between inner plate and outer plate.

[0007] Further, the inner plate includes two half-round plates, two described half-round plates are rotatably connected, outer plate includes two half-ring plates, two described half-ring plates are rotatably connected.

[0008] Further, each described lug is perpendicular to outer plate, the lug and outer plate are integrated structure.

[0009] Further, the isolation cylinder is fixed on the side of outer plate close to inner plate.

[0010] A kind of top of European smelting furnace gasification furnace arch material repairing method, specific steps are as follows:

[0011] S1: gasification furnace is stopped by wind;

[0012] S2: the inner plate and the outer plate are assembled respectively, the inner plate and the outer plate are connected together through the connecting block, after being folded, the inner plate and the outer plate are inserted into the gasification furnace from the material distribution port needing to be repaired, the outer plate is pasted on the material distribution port;

[0013] S3: the free end of the pull bar on each lifting lug is welded on the inner wall of the material distribution port;

[0014] S4: the isolation cylinder is welded on the outer plate;

[0015] S5: the gap between the outer plate and the material distribution port is sealed by using ceramic fiber cotton, the gap of the outer plate on the outside of the isolation cylinder is sealed, and the gap at the connecting position between the isolation cylinder and the outer plate is sealed;

[0016] S6: the pouring space between the isolation cylinder and the inner wall of the material distribution port is poured by using high-temperature ceramic refractory in a molten state; the pouring material is continuously poured, and is flush with the flange surface;

[0017] S7: after the ceramic refractory is initially solidified, the connecting position between the isolation cylinder and the outer plate is high-temperature melted, and the isolation cylinder is taken out;

[0018] S8: the connecting block is high-temperature melted, the inner plate is taken out, the inner refractory of the flange surface is cleaned, the refractory height is required to be lower than the flange surface, and the refractory repair of the material distribution port is completed.

[0019] Further, in the step S3, the axis direction of the pull bar points to the vertical line where the center of the inner plate is located.

[0020] Further, in the step S4, the isolation cylinder and the outer plate are connected by spot welding, and the distance between the isolation cylinder and the inner wall of the material distribution port is the thickness of the refractory needing to be repaired.

[0021] Further, in the step S6, the pouring height of the high-temperature ceramic refractory is the height of the isolation cylinder, the pouring solidification time of the high-temperature ceramic refractory is two hours, and the inner side of the isolation cylinder is baked after pouring.

[0022] The application designs a repairing device and a repairing method, the refractory of the material distribution port is repaired, the repairing work of the material distribution port can be completed within 6 hours, the period of the repairing work of the material distribution port is greatly shortened, the time of blowing off and stopping the furnace is shortened, and the production efficiency is relatively improved.

[0023] The application does not need workers to enter the inside of the gasification furnace to perform the repairing work, but only needs to complete the repairing work of the material distribution port from the outside, the safety hidden danger existing in the repairing of the material distribution port from the inside of the gasification furnace is avoided, and the workers can safely and quickly complete the repairing work of the material distribution port.

[0024] The present application embeds the reinforcing rib in the ceramic refractory, strengthens the connection between the ceramic refractory and the inner wall of the distribution port, makes the connection between the ceramic refractory and the inner wall of the distribution port more firm, and improves the service life of the ceramic refractory. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application is further illustrated by the drawings and specific implementation cases.

[0026] Figure 1 It is an installation schematic view of the present application.

[0027] Figure 2 It is a structural schematic view of the present application.

[0028] In the figure: 1-distribution port, 2-plugging plate, 201-inner plate, 202-outer plate, 203-connection block, 3-lifting lug, 4-reinforcing rib, 5-isolation cylinder, 6-pouring space. DETAILED DESCRIPTION

[0029] As shown in Figure 1 , Figure 2 , the present application is a kind of Aojia furnace gasification furnace arch top distribution port refractory repair device, including the circular plugging plate 2 for plugging distribution port 1 close to the inside of gasification furnace one side for plugging distribution port 1, plugging plate 2 is composed of a inner plate 201 and a outer plate 202, four or six connection blocks 203 are connected between inner plate 201 and outer plate 202, connection block 203 is respectively spot welded together with inner plate 201 and outer plate 202, and inner plate 201 is fixed at the center of outer plate 202.

[0030] Inner plate 201 is rotatably connected together by pin shaft through two semicircular plates, and outer plate 202 is rotatably connected together by pin shaft through two semicircular plates.

[0031] The upper surface of outer plate 202 is provided with six annular distribution lifting lugs 3, each lifting lug 3 is perpendicular to the upper surface of inner plate 201 and outer plate 202, and is vertically arranged, the lifting lug 3 and the outer plate 202 can be integrally poured, or can be welded later, in the embodiment, the lifting lug 3 is welded on the outer plate 202.

[0032] Each lifting lug 3 is provided with a reinforcing rib 4, one end of the reinforcing rib 4 is fixed on the lifting lug 3, the other end is fixed on the inner wall of the distribution port 1 closest to the outer side, and is fixed on the inner wall of the distribution port by welding.

[0033] The outer plate 202 at the junction of inner plate 201 and outer plate 202 is fixed with an isolation cylinder 5, and the isolation cylinder 5 is perpendicular to the outer plate 202.

[0034] The space between the outer side of the isolation cylinder 5 and the inner wall of the material distribution port 1 is a pouring space 6 for filling high-temperature refractory material, and the high-temperature ceramic refractory material is filled in the pouring space 6, so that the high-temperature ceramic refractory material is attached to the inner wall of the material distribution port 1.

[0035] The repairing method for repairing the refractory material on the inner wall of the material distribution port 1 using the above repairing device, S1, the gasification furnace is shut down for maintenance;

[0036] S2, the inner plate 201 and the outer plate 202 are assembled respectively, and the inner plate 201 and the outer plate 202 are connected together through the connecting block 203, and after being folded, they are inserted into the gasification furnace from the material distribution port 1 which needs to be repaired, and then the inner plate 201 and the outer plate 202 are unfolded, and the outer plate 202 is attached to the material distribution port 1;

[0037] S3, the free end of the pull bar 4 on each lifting lug 3 is welded to the inner wall of the material distribution port 1, and when welding, the axis direction of the pull bar 4 is directed to the vertical line where the center of the inner plate 201 is located;

[0038] S4, the isolation cylinder 5 is welded to the outer plate 202, and the welding method is point welding, and only a few connection points are point welded to fix the isolation cylinder 5 on the outer plate 202, and there is no strength requirement, the diameter of the isolation cylinder 5 is controlled, and the distance between the isolation cylinder 5 and the inner wall of the material distribution port 1 is the thickness of the refractory material which needs to be repaired;

[0039] S5, ceramic fiber cotton is used to block the gap between the outer plate 202 and the material distribution port 1, and in this embodiment, the ceramic fiber cotton is high-aluminum ceramic fiber cotton, the long-term working temperature of which is 950-1280℃, and the actual use temperature is -50-1280℃, the gap of the outer plate 202 outside the isolation cylinder 5 is blocked, and the gap between the isolation cylinder 5 and the outer plate 202 is also blocked;

[0040] S6, high-temperature ceramic refractory material in a molten state is used to pour the pouring space 6 between the isolation cylinder 5 and the inner wall of the material distribution port 1, and the temperature of the high-temperature ceramic refractory material is 1200-1500℃, and the pouring height is the height of the isolation cylinder 5, and the isolation cylinder 5 is high to the outer end surface of the material distribution port 1 on the outside of the furnace, which is a flange surface, and is used to connect a sealing cover to block the material distribution port 1 when no material is added, and two hours are needed to wait for the ceramic refractory material to solidify after pouring, and the inner side of the isolation cylinder 5 is baked at high temperature to accelerate the solidification efficiency of the ceramic refractory material after pouring;

[0041] The above high-temperature ceramic refractory material is the ceramic refractory material disclosed in Chinese patent CN200710189737.2, and the main physicochemical indexes thereof are as follows:

[0042] Al2O3(%) ≥70;

[0043] Fire resistance temperature (℃) >1790;

[0044] Compressive strength (MPa) ≥60 (110℃×24h);≥140 (1450℃×3h);

[0045] Flexural strength (Mpa) ≥10 (110℃×24h);≥14 (1450℃×3h);

[0046] Linear change after firing (%) ±0.1 (110℃×24h);±0.1 (1450℃×3h);

[0047] Thermal shock resistance (times) >30 (1100℃ water cooling).

[0048] The ceramic coating layer after sintering reaction has a compressive strength of 161 and a flexural strength of 17.8, and can continuously and stably play its role.

[0049] S7, after the ceramic refractory is solidified, the connecting points of the isolation cylinder 5 and the outer plate 202 are melted by using a welding machine at high temperature, and the isolation cylinder 5 is taken out;

[0050] S8, the connecting block 203 between the inner plate 201 and the outer plate 202 is melted by using a welding machine at high temperature, the inner plate 201 is taken out, the cloth feeding port 1 is connected with the inside of the gasification furnace, the refractory repair of the cloth feeding port 1 is completed, and the outer plate 202 is left at the cloth feeding port 1 as a bottom support for repairing the refractory. In the later period, the outer plate 202 is melted together with the ore material for smelting iron due to high temperature.

[0051] In summary, the present application designs a repairing device and a repairing method to repair the refractory of the cloth feeding port 1, which can complete the repairing work of the cloth feeding port 1 within 6 hours, greatly shortens the period of the repairing work of the cloth feeding port 1, shortens the time of blowing off and stopping the furnace, and relatively improves the production efficiency.

[0052] The present application does not need staff to enter the inside of the gasification furnace to perform the repairing work, but only needs to complete the repairing work of the cloth feeding port from the outside, avoids the safety hidden danger existing in repairing the cloth feeding port from the inside of the gasification furnace, and enables the staff to safely and quickly complete the repairing work of the cloth feeding port.

[0053] The present application embeds the reinforcing bar 4 in the ceramic refractory, reinforces the connection between the ceramic refractory and the inner wall of the cloth feeding port 1, makes the connection between the ceramic refractory and the inner wall of the cloth feeding port 1 more firm, and improves the service life of the ceramic refractory.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "inboard", "outboard", "top", "end", "side" and the like refer to the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. At the same time, unless otherwise specifically stated and limited, the terms "mounting", "setting", "connecting" and the like should be broadly understood, for example, "connecting" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] Obviously, the above only describes one embodiment of the present application, not all embodiments. Based on the embodiments in the present application, other modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application, as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A device for repairing refractory material of a top distribution port of a gasification arch of a cupola, characterized in that, The application relates to a refractory repairing device for a material feeding port of a gasification furnace arch top of a OYM furnace, which comprises a blocking plate (2) for blocking the material feeding port (1), wherein a plurality of hanging ears (3) are arranged along the outer edge circumference of the blocking plate (2), a reinforcing rib (4) is arranged on each of the hanging ears (3), the free end of each of the reinforcing ribs (4) is fixed to the inner wall of the material feeding port (1), an isolation cylinder (5) is arranged on the blocking plate (2), a pouring space (6) for pouring refractory material is formed between the isolation cylinder (5) and the inner wall of the material feeding port (1), and the pouring space (6) is filled with high-temperature ceramic refractory material.

2. The cupola furnace arch top distribution port refractory repairing device according to claim 1, characterized in that, The blocking plate (2) comprises an inner plate (201), an outer plate (202) and a connecting block (203), and the connecting block (203) is fixed between the inner plate (201) and the outer plate (202).

3. The cupola furnace arch top distribution port refractory repairing device according to claim 2, characterized in that, The inner plate (201) comprises two half-circular plates, the two half-circular plates are rotationally connected, the outer plate (202) comprises two half-ring plates, and the two half-ring plates are rotationally connected.

4. The cupola furnace arch top distribution port refractory repairing device according to claim 2, characterized in that, Each of the hanging ears (3) is perpendicular to the outer plate (202), and the hanging ear (3) and the outer plate (202) are in an integrated structure.

5. The cupola furnace arch top distribution port refractory repairing device according to claim 2, characterized in that, The isolation cylinder (5) is fixed on one side of the outer plate (202) close to the inner plate (201).

6. A repairing method using the refractory repairing device for a material feeding port of a gasification furnace arch top of a OYM furnace, and the specific steps are as follows: S1: stopping the gasification furnace; S2: assembling the inner plate (201) and the outer plate (202) respectively, connecting the inner plate (201) and the outer plate (202) through the connecting block (203), folding and then stretching into the gasification furnace from the material feeding port (1) which needs to be repaired, unfolding the inner plate (201) and the outer plate (202), and pasting the outer plate (202) on the material feeding port (1); S3: welding the free end of the reinforcing rib (4) on each of the hanging ears (3) on the inner wall of the material feeding port (1); S4: welding the isolation cylinder (5) on the outer plate (202); S5: sealing the gap between the outer plate (202) and the material feeding port (1) by using ceramic fiber cotton, sealing the gap of the outer plate (202) on the outer side of the isolation cylinder (5), and sealing the gap at the connecting position between the isolation cylinder (5) and the outer plate (202); S6: pouring the pouring space (6) between the isolation cylinder (5) and the inner wall of the material feeding port (1) by using high-temperature ceramic refractory material in a molten state; the pouring material is continuously poured, and the outer end face of the material feeding port located on the outside of the furnace is flush with the outer end face which is a flange face; S7: after the ceramic refractory material is initially solidified, the connecting position between the isolation cylinder (5) and the outer plate (202) is high-temperature melted, and the isolation cylinder (5) is taken out; S8: high-temperature melting the connecting block (203), taking out the inner plate (201), cleaning the inner refractory material of the flange face, requiring that the refractory material is lower than the flange face, and completing the refractory repairing of the material feeding port (1).

7. The repair method of claim 6, wherein In the step S3, the axis direction of the reinforcing rib (4) points to the vertical line where the center of the inner plate (201) is located.

8. The repair method according to claim 7, characterized in that, In the step S4, the isolation cylinder (5) and the outer plate (202) are connected by spot welding, and the distance between the isolation cylinder (5) and the inner wall of the material feeding port (1) is the thickness of the refractory material which needs to be repaired.

9. The repair method of claim 7, wherein, In the step S6, the pouring height of the high-temperature ceramic refractory is the height of the isolation cylinder (5), and the pouring and solidification time of the high-temperature ceramic refractory is two hours, and the inner side of the isolation cylinder (5) is baked after pouring.

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