Ceramic protective tuyere small sleeve

Abstract

A ceramic protection tuyere small sleeve comprises a flange, an inner sleeve, an outer sleeve, a fluid director and a ceramic protective cover, the ceramic protective cover comprises an outer conical surface protective cover and / or a front end face protective cover, and the ceramic protection tuyere small sleeve is characterized in that the outer conical surface protective cover comprises a plurality of outer conical surface ceramic protective pieces, and a plurality of first pressing strips are arranged on the outer conical surface of the front portion of the tuyere small sleeve; a first limiting slot is formed between every two adjacent first pressing strips, and each outer conical surface ceramic protection sheet is mounted in the corresponding first limiting slot; the front end face protective cover comprises a plurality of end face ceramic protective pieces, a plurality of second pressing strips are arranged on the front end face of the tuyere small sleeve, a second limiting inserting groove is formed between every two adjacent second pressing strips, and the end face ceramic protective pieces are installed in the corresponding second limiting inserting grooves respectively. The ceramic protective tuyere small sleeve has good wear resistance and impact resistance, the ceramic protective cover is easy to process and not easy to damage, and the service life of the tuyere small sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to cooling equipment for an air supply system of an iron-making blast furnace, in particular to a small tuyere sleeve protected by ceramics. Background Art

[0002] The tuyere sleeve of a blast furnace is an important process component for air supply and coal injection in an iron-making blast furnace. Hot air of more than 1,000 degrees Celsius can be transported into the blast furnace through the tuyere sleeve. Most of the existing tuyere sleeves are made of copper through casting. They are in a high-temperature environment. Due to the impact and scouring of the high-speed rotating coke particles and furnace charge in the cyclotron of the blast furnace, as well as the shedding of slag skin, the front outer wall and front end of the tuyere sleeve are quickly worn, and the service life of the tuyere sleeve is sharply reduced.

[0003] In order to solve the problem of burning, wear and corrosion on the front outer wall and front end of the tuyere sleeve, resulting in a short service life, the applicant's prior patent with authorization announcement number CN214032562U (authorization announcement date is August 24, 2021) discloses a collision-resistant and wear-resistant tuyere sleeve, including a flange, an inner sleeve, an outer sleeve and a deflector, the outer sleeve is arranged on the outside of the inner sleeve, the rear end of the outer sleeve and the rear end of the inner sleeve are fixedly connected to the flange, the outer sleeve, the inner sleeve and the flange form an internal cavity, and the deflector is arranged in the internal cavity; it also includes a front protective cap, a plurality of first fixing screws, an outer protective cover and a plurality of second fixing screws; the front protective cap is installed on the front end surface of the outer sleeve, and the head of each first fixing screw and the front end surface of the outer sleeve jointly lock the front protective cap; the outer protective cover is sleeved on the front part of the outer sleeve, and the head of each second fixing screw and the outer side wall of the front part of the outer sleeve jointly lock the outer protective cover. The front protective cap and the outer protective cover of the tuyere cover are both integral. Although the integral front protective cap and the outer protective cover can enhance the impact resistance and wear resistance of the front part of the tuyere cover, due to the brittleness of the ceramic material, once the integral front protective cap and the outer protective cover are damaged in one place due to collision, the entire front protective cap and the outer protective cover are easily broken and scrapped, and the entire front protective cap and the outer protective cover need to be replaced. In addition, the front protective cap and the outer protective cover are integral and have many through holes, which are difficult to manufacture and have high costs. Summary of the invention

[0004] The problem to be solved by the utility model is to provide a small tuyere cover with ceramic protection, which not only has good wear resistance and impact resistance, but also the ceramic shield is easy to process and not easy to be damaged, which is conducive to extending the service life of the small tuyere cover.

[0005] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0006] A ceramic-protected tuyere sleeve comprises a flange, an inner sleeve, an outer sleeve, a deflector and a ceramic shield, wherein the outer sleeve, the inner sleeve and the flange form an internal cavity, and the deflector is arranged in the internal cavity; the ceramic shield comprises an outer cone shield and / or a front end face shield, and is characterized in that: the outer cone shield comprises a plurality of outer cone ceramic protective sheets, a plurality of first pressure strips are arranged on the outer cone surface of the front part of the tuyere sleeve, a first limiting slot is formed between two adjacent first pressure strips, and each outer cone ceramic protective sheet is respectively installed in the corresponding first limiting slot; the front end face shield comprises a plurality of end face ceramic protective sheets, a plurality of second pressure strips are arranged on the front end surface of the tuyere sleeve, a second limiting slot is formed between two adjacent second pressure strips, and each end face ceramic protective sheet is respectively installed in the corresponding second limiting slot.

[0007] The ceramic shield may include only an outer cone shield, or only a front end shield, or may include both an outer cone shield and a front end shield.

[0008] In the utility model, a plurality of outer cone ceramic protection sheets constitute an outer cone protection cover, and a plurality of end face ceramic protection sheets constitute a front face protection cover, which protects the front outer wall and the front end of the tuyere sleeve, so that it has good wear resistance and impact resistance, and reduces wear. Since the outer cone ceramic protection sheet and the end face ceramic protection sheet have a small area, they have strong impact resistance and are not easily damaged by collision; and if a certain outer cone ceramic protection sheet or end face ceramic protection sheet is damaged by collision, it is sufficient to replace the outer cone ceramic protection sheet or the end face ceramic protection sheet, without replacing the entire outer cone protection cover and the front face protection cover, which can save materials and costs. In addition, the outer cone ceramic protection sheet and the end face ceramic protection sheet with a smaller area are easier to manufacture and install, which can save costs. In the case where the thickness of the first layer is greater than that of the outer cone ceramic protection sheet and the thickness of the second layer is greater than that of the end face ceramic protection sheet, when the iron slag in the blast furnace falls, part of the iron slag falls on the first layer and the second layer, which can reduce the occurrence of the outer cone ceramic protection sheet and the end face ceramic protection sheet being damaged.

[0009] Usually, when manufacturing the tuyere sleeve of the utility model, after completing the installation and connection of the flange, inner sleeve, outer sleeve, and deflector, first install each first pressure strip and form a first limiting slot, install each second pressure strip and form a second limiting slot, and then install each outer cone surface ceramic protection sheet and each end surface ceramic protection sheet. The first limiting slot formed by each first pressure strip is used to limit the outer cone surface ceramic protection sheet to prevent the outer cone surface ceramic protection sheet from being displaced or separated from the tuyere sleeve; the second limiting slot formed by each second pressure strip is used to limit the end surface ceramic protection sheet to prevent the end surface ceramic protection sheet from being displaced or separated from the tuyere sleeve.

[0010] Typically, the first limiting slots are the same in number and correspond one-to-one with the outer conical ceramic protective sheets, and the first limiting slots match the shape and size of the outer conical ceramic protective sheets; the second limiting slots are the same in number and correspond one-to-one with the end face ceramic protective sheets, and the second limiting slots match the shape and size of the end face ceramic protective sheets.

[0011] In a preferred embodiment, the above-mentioned multiple first pressure strips are arranged in sequence along the circumference of the air outlet sleeve. In a more preferred embodiment, the above-mentioned first pressure strips are all in a front-to-back direction, the width of the first limiting slot gradually decreases from back to front, and the width of the outer conical ceramic protective sheet gradually decreases from back to front; the rear end of the first limiting slot has an insertion opening for the outer conical ceramic protective sheet. When installing the outer conical ceramic protective sheet, the outer conical ceramic protective sheet is inserted into the first limiting slot from the insertion opening of the outer conical ceramic protective sheet, and then moved forward into place. The above-mentioned multiple first pressure strips are usually arranged at equal intervals along the circumference of the air outlet sleeve, and the outer conical ceramic protective sheets are of the same size (so that the outer conical ceramic protective sheets can be mass-produced, which is conducive to reducing costs).

[0012] In a more preferred embodiment, the cross-sectional shape of the first bead is a trapezoid; in the cross-sectional shape of the first bead, the length of the outer side is greater than the length of the inner side. In a further preferred embodiment, the cross-sectional shape of the first bead is an isosceles trapezoid. The inner side refers to the side of the outer conical surface close to the front part of the tuyere sleeve in the cross-sectional shape of the first bead, and the outer side refers to the side of the outer conical surface away from the front part of the tuyere sleeve in the cross-sectional shape of the first bead; in the cross-sectional shape of the first bead, the inner side and the outer side constitute the two bases of the trapezoid, and the other two sides constitute the waist of the trapezoid. In this way, the first limiting slot formed between the two first pressure strips has a cross-sectional shape that is roughly trapezoidal (similar to a dovetail groove), and its slot width is smaller than its slot bottom width (the slot bottom of the first limiting slot refers to the portion of its outer conical surface close to the front part of the air outlet sleeve; the slot of the first limiting slot refers to the portion of its outer conical surface away from the front part of the air outlet sleeve). Therefore, the first limiting slot can reliably limit the outer conical ceramic protective plate therein through the inclined slot walls on both sides; even if the first pressure strip is partially burned after a long period of operation, the first pressure strip as a whole can still maintain the limitation on the outer conical ceramic protective plate.

[0013] The above-mentioned first pressure strip can be welded to the outer conical surface of the front part of the tuyere sleeve; the first pressure strip can also be fixedly installed on the outer conical surface of the front part of the tuyere sleeve by a connecting piece (such as a screw); the first pressure strip can also be fixedly installed on the outer conical surface of the front part of the tuyere sleeve by a combination of welding and a connecting piece (such as a screw).

[0014] In a preferred embodiment, the above-mentioned multiple second pressure strips are arranged in sequence along the circumference of the air outlet sleeve. In a more preferred embodiment, the above-mentioned second pressure strips are arranged radially, the width of the second limiting slot gradually decreases from the outside to the inside, and the width of the end face ceramic protection plate gradually decreases from the outside to the inside; the outer end of the second limiting slot has an end face ceramic protection plate insertion port. When installing the end face ceramic protection plate, the end face ceramic protection plate is inserted into the second limiting slot from the end face ceramic protection plate insertion port, and then moved inward into place. The above-mentioned multiple second pressure strips are usually arranged at equal intervals along the circumference of the air outlet sleeve, and the end face ceramic protection plates are of the same size (so that the end face ceramic protection plates can be mass-produced, which is conducive to reducing costs).

[0015] In a more preferred embodiment, the cross-sectional shape of the second bead is trapezoidal; in the cross-sectional shape of the second bead, the length of the front side is greater than the length of the rear side. In a further preferred embodiment, the cross-sectional shape of the second bead is an isosceles trapezoid. The rear side refers to the side of the cross-sectional shape of the second bead that is close to the front end face of the tuyere sleeve, and the front side refers to the side of the cross-sectional shape of the second bead that is away from the front end face of the tuyere sleeve; in the cross-sectional shape of the second bead, the rear side and the front side constitute the two bottoms of the trapezoid, and the remaining two sides constitute the waist of the trapezoid. In this way, the second limiting slot formed between the two second pressure strips has a trapezoidal cross-sectional shape (similar to a dovetail slot), and its slot width is smaller than its slot bottom width (the slot bottom of the second limiting slot refers to the part close to the front end face of the air outlet sleeve; the slot of the second limiting slot refers to the part away from the front end face of the air outlet sleeve). Therefore, the second limiting slot can reliably limit the end face ceramic protection plate through the inclined slot walls on both sides; even if the second pressure strip is partially burned after a long period of operation, the second pressure strip as a whole can still maintain the limitation of the end face ceramic protection plate.

[0016] The above-mentioned second pressure strip can be welded to the front end face of the tuyere sleeve; the second pressure strip can also be fixedly installed on the front end face of the tuyere sleeve by a connecting piece (such as a screw); the second pressure strip can also be fixedly installed on the front end face of the tuyere sleeve by a combination of welding and a connecting piece (such as a screw).

[0017] The first pressure strip and the second pressure strip can be made of copper, copper alloy or steel.

[0018] The plurality of outer cone ceramic protection sheets can be arranged in a circle (the plurality of outer cone ceramic protection sheets are usually arranged at equal intervals) to cover the entire outer cone surface of the front part of the tuyere sleeve. The plurality of end surface ceramic protection sheets can be arranged in a circle (the plurality of end surface ceramic protection sheets are usually arranged at equal intervals) to cover the entire front end surface of the tuyere sleeve.

[0019] Since the top of the outer cone surface of the front part of the tuyere sleeve and the top of the front face of the tuyere sleeve are the parts most likely to be hit by the iron slag in the blast furnace, the outer cone surface protection cover can be designed as a partial protection cover, and the above-mentioned multiple outer cone surface ceramic protection sheets can cover the top of the outer cone surface of the front part of the tuyere sleeve; similarly, the front face protection cover can be designed as a partial protection cover, and the above-mentioned multiple end face ceramic protection sheets can cover the top of the front face of the tuyere sleeve. In this way, the materials of the outer cone surface protection cover and the front face protection cover can be saved, and the production cost can be saved.

[0020] Generally, the tuyere jacket mentioned above can be a tuyere jacket of various structural forms, such as a tuyere jacket with a single cooling water channel, or a tuyere jacket with multiple cooling water channels independent of each other.

[0021] Typically, when the outer conical ceramic protection sheet is installed in place in the first limiting slot, two side walls of the outer conical ceramic protection sheet are in contact with two side walls of the first limiting slot respectively.

[0022] After the outer conical ceramic protective sheet is installed in place in the first limiting slot, there is usually a small gap between the outer conical ceramic protective sheet and the inner wall of the first limiting slot, and the outer conical ceramic protective sheet needs to be further fixed. The fixing method can be: (1) high temperature resistant glue is injected into the gap between the outer conical ceramic protective sheet and the inner wall of the first limiting slot, and the outer conical ceramic protective sheet is bonded to the outer conical surface of the front part of the air outlet sleeve and the side of the first pressure strip through the high temperature resistant glue; or (2) a through hole is provided on the outer conical ceramic protective sheet, and a screw hole is correspondingly provided on the outer conical surface of the front part of the air outlet sleeve, and a fixing screw is installed in the screw hole, and the rod of the fixing screw passes through the corresponding through hole, and the head of the fixing screw and the outer conical surface of the front part of the air outlet sleeve jointly lock the corresponding outer conical ceramic protective sheet; or (3) a metal sheet or a metal wedge is inserted into the gap between the outer conical ceramic protective sheet and the inner wall of the first limiting slot. The above three fixing methods can be used alone or in combination.

[0023] Typically, when the end surface ceramic protection sheet is installed in place in the second limiting slot, two side walls of the end surface ceramic protection sheet are in contact with two side groove walls of the second limiting slot respectively.

[0024] After the above-mentioned end face ceramic protection sheet is installed in place in the second limiting slot, there is usually still a small gap between the end face ceramic protection sheet and the inner wall of the second limiting slot, and the end face ceramic protection sheet needs to be further fixed. The fixing method can be: (1) high temperature resistant glue is injected into the gap between the end face ceramic protection sheet and the inner wall of the second limiting slot, and the end face ceramic protection sheet is bonded to the front end face of the front part of the air outlet sleeve and the side of the second pressure strip through the high temperature resistant glue; or (2) a through hole is provided on the end face ceramic protection sheet, and a screw hole is correspondingly provided on the front end face of the front part of the air outlet sleeve, and a fixing screw is installed in the screw hole, and the rod of the fixing screw passes through the corresponding through hole, and the head of the fixing screw and the front end face of the air outlet sleeve jointly lock the corresponding end face ceramic protection sheet; or (3) a metal sheet or a metal wedge is inserted into the gap between the end face ceramic protection sheet and the inner wall of the second limiting slot. The above three fixing methods can be used alone or in combination.

[0025] In a preferred embodiment, the thickness of the outer cone ceramic protection sheet and the end surface ceramic protection sheet are both 5-30 mm.

[0026] The inner side surface of the outer cone ceramic protection sheet is a curved surface or a flat surface. Preferably, the length of the outer cone ceramic protection sheet is 30-200 mm.

[0027] The utility model arranges a plurality of outer cone ceramic protection sheets to form an outer cone protection cover, and arranges a plurality of end face ceramic protection sheets to form a front face protection cover, so that the front part of the air outlet sleeve has good wear resistance and impact resistance; and because the outer cone ceramic protection sheets and the end face ceramic protection sheets are small in area, they have strong impact resistance and are not easily damaged by collision, which is beneficial to prolonging the service life of the air outlet sleeve. The outer cone ceramic protection sheets and the end face ceramic protection sheets with smaller areas are easier to manufacture and install, which can save costs. Moreover, the first limiting slots formed by each first pressure strip are used to limit the outer cone ceramic protection sheet, and the second limiting slots formed by each second pressure strip are used to limit the end face ceramic protection sheet, so that each outer cone ceramic protection sheet and the end face ceramic protection sheet can maintain a stable position for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0029] Figure 2 yes Figure 1 AA section view;

[0030] Figure 3 yes Figure 1 The K1 direction view of the tuyere sleeve is shown;

[0031] Figure 4 It is a schematic diagram of the structure of the outer cone ceramic protection sheet in Example 1 of the utility model;

[0032] Figure 5 yes Figure 4 A top view of the ceramic protective sheet with inner and outer conical surfaces;

[0033] Figure 6 yes Figure 4 Left view of the middle and outer conical ceramic protection plate;

[0034] Figure 7 This is a schematic diagram of the structure of the end surface ceramic protection sheet in Example 1 of the utility model;

[0035] Figure 8 yes Figure 7 A top view of the mid-end ceramic protection sheet;

[0036] Fig. 9 yes Figure 7 Left view of the middle end ceramic protection plate;

[0037] Fig.10 yes Figure 3 BB section view (partial);

[0038] Fig.11 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0039] Fig.12 It is a structural schematic diagram of Embodiment 3 of the present utility model;

[0040] Fig.13 yes Fig.12 CC profile of ;

[0041] Fig.14 yes Fig.12 The K2 direction view of the tuyere sleeve is shown;

[0042] Fig.15 It is a structural schematic diagram of embodiment 4 of the present utility model. DETAILED DESCRIPTION

[0043] Example 1

[0044] like Figure 1-3 , Fig.10As shown, this ceramic-protected tuyere sleeve includes a flange 1, an inner sleeve 2, an outer sleeve 3, a deflector 4 and a ceramic shield. The outer sleeve 3, the inner sleeve 2 and the flange 1 form an internal cavity 5, and the deflector 4 is arranged in the internal cavity 5; the ceramic shield includes an outer cone shield and a front face shield; the outer cone shield includes a plurality of (such as 10) outer cone ceramic protective sheets 6, and a plurality of (such as 11) first pressure strips 7 are provided on the outer cone surface 01 at the front of the tuyere sleeve, and a first limiting slot 8 is formed between two adjacent first pressure strips 7, and each outer cone ceramic protective sheet 6 is respectively installed in the corresponding first limiting slot 8; the front face shield includes a plurality of (such as 8) end face ceramic protective sheets 9, and a plurality of (such as 9) second pressure strips 10 are provided on the front face 02 of the tuyere sleeve, and a second limiting slot 11 is formed between two adjacent second pressure strips 10, and each end face ceramic protective sheet 9 is respectively installed in the corresponding second limiting slot 11. The first limiting slots 8 are the same in number (e.g., 10 each) as the outer conical ceramic protective sheet 6 and correspond one to one, and the first limiting slots 8 match the shape and size of the outer conical ceramic protective sheet 6; the second limiting slots 11 are the same in number (e.g., 8 each) as the end face ceramic protective sheet 9 and correspond one to one, and the second limiting slots 11 match the shape and size of the end face ceramic protective sheet 9.

[0045] refer to Figure 2 and Figure 3 , the above-mentioned multiple first pressure strips 7 are arranged in sequence along the circumference of the air outlet small sleeve; in this embodiment, multiple first pressure strips 7 are arranged at equal intervals along the circumference of the air outlet small sleeve, and the sizes of the outer cone surface ceramic protection sheets 6 are consistent. All the first pressure strips 7 are in a front-to-back direction, the width of the first limiting slot 8 gradually decreases from the back to the front, and the width of the outer cone surface ceramic protection sheet 6 gradually decreases from the back to the front (refer to Figure 4-6 , the width of the rear end 61 of the outer conical ceramic protection sheet 6 is greater than its front end 62); the rear end of the first limiting slot 8 has an outer conical ceramic protection sheet insertion opening 81.

[0046] refer to Figure 2 and Figure 3 , the cross-sectional shape of the first bead 7 is a trapezoid (in this embodiment, the cross-sectional shape of the first bead 7 is an isosceles trapezoid); in the cross-sectional shape of the first bead 7, the length of the outer side 71 is greater than the length of the inner side 72. In the cross-sectional shape of the first bead 7, the inner side 72 and the outer side 71 constitute the two bottoms of the trapezoid, and the other two sides 73 and 74 constitute the waist of the trapezoid. The first limiting slot 8 formed between the two first beadings 7 has a cross-sectional shape that is roughly trapezoidal (similar to a dovetail groove), and the width of its notch 82 is smaller than the width of its groove bottom 83. The first limiting slot 8 limits the outer conical ceramic protective plate 6 therein through the inclined groove walls on both sides thereof.

[0047] In this embodiment, the first pressure strip 7 is welded to the outer conical surface 01 at the front of the tuyere sleeve.

[0048] refer to Figure 2 and Figure 3 , the above-mentioned multiple second pressure strips 10 are arranged in sequence along the circumference of the air outlet small sleeve; in this embodiment, multiple second pressure strips 10 are arranged at equal intervals along the circumference of the air outlet small sleeve, and the sizes of the end surface ceramic protection sheets 9 are consistent. The second pressure strips 10 are arranged radially, the width of the second limiting slots 11 gradually decreases from the outside to the inside, and the width of the end surface ceramic protection sheets 9 gradually decreases from the outside to the inside (refer to Figure 7-9 , the width of the outer end 91 of the end surface ceramic protection sheet 9 is greater than that of the inner end 92 thereof); the outer end of the second limiting slot 11 has an end surface ceramic protection sheet insertion opening 111.

[0049] refer to Fig.10 , the cross-sectional shape of the second bead 10 is a trapezoid (in the present embodiment, the cross-sectional shape of the second bead 10 is an isosceles trapezoid); in the cross-sectional shape of the second bead 10, the length of the front side 101 is greater than the length of the rear side 102. In the cross-sectional shape of the second bead 10, the rear side 102 and the front side 101 constitute the two bottoms of the trapezoid, and the other two sides 103 and 104 constitute the waist of the trapezoid. The second limiting slot 11 formed between the two second beadings 10 has a trapezoidal cross-sectional shape (similar to a dovetail slot), and the width of its slot 112 is smaller than the width of its slot bottom 113. The second limiting slot 11 limits the end ceramic protective plate 9 therein through the inclined slot walls on both sides thereof.

[0050] In this embodiment, the second pressure strip 10 is welded to the front end surface 02 of the tuyere sleeve.

[0051] The first pressure strip 7 and the second pressure strip 10 can be made of copper, copper alloy or steel.

[0052] In this embodiment, the inner side surface of the outer conical ceramic protection sheet 6 is a plane. The inner side surface of the outer conical ceramic protection sheet 6 can also be a curved surface, and its curvature matches the outer conical surface 01 of the front part of the tuyere small sleeve.

[0053] The thickness of the outer cone ceramic protection sheet 6 is 5-30 mm, the thickness of the end surface ceramic protection sheet 9 is 5-30 mm, and the length of the outer cone ceramic protection sheet 6 is 30-200 mm.

[0054] In this embodiment, the outer cone protection cover is designed as a partial protection cover, and the above-mentioned multiple outer cone ceramic protection sheets 6 cover the top of the front outer cone surface 01 of the air outlet sleeve; similarly, the front end face protection cover is designed as a partial protection cover, and the above-mentioned multiple end face ceramic protection sheets 9 cover the top of the front end face 02 of the air outlet sleeve.

[0055] The tuyere sleeve can be a tuyere sleeve of various structural forms, such as a tuyere sleeve with a single cooling water channel (such as Figure 1 The tuyere sleeve shown in the figure) or a tuyere sleeve having multiple independent cooling water channels.

[0056] When manufacturing the air outlet sleeve of this embodiment, after completing the installation and connection of the flange 1, the inner sleeve 2, the outer sleeve 3, and the deflector 4, first install each first pressure strip 7 and form the first limiting slot 8, install each second pressure strip 10 and form the second limiting slot 11, and then install each outer cone surface ceramic protection sheet 6 and each end surface ceramic protection sheet 9. When installing the outer cone surface ceramic protection sheet 6, the outer cone surface ceramic protection sheet 6 is inserted into the first limiting slot 8 from the outer cone surface ceramic protection sheet insertion port 81, and then moved forward to position. When installing the end surface ceramic protection sheet 9, the end surface ceramic protection sheet 9 is inserted into the second limiting slot 11 from the end surface ceramic protection sheet insertion port 111, and then moved inward to position.

[0057] When the outer cone ceramic protection sheet is installed in place in the first limiting slot, usually two side walls of the outer cone ceramic protection sheet are in contact with two side groove walls of the first limiting slot respectively. After the outer cone ceramic protective sheet is installed in place in the first limiting slot, if there is still a small gap between the outer cone ceramic protective sheet and the inner wall of the first limiting slot, the outer cone ceramic protective sheet can be further fixed by the following methods: (1) high temperature resistant glue is injected into the gap between the outer cone ceramic protective sheet and the inner wall of the first limiting slot, and the outer cone ceramic protective sheet is bonded to the outer cone surface of the front part of the air outlet sleeve and the side of the first pressure strip through the high temperature resistant glue; or (2) a through hole is provided on the outer cone ceramic protective sheet, and a screw hole is correspondingly provided on the outer cone surface of the front part of the air outlet sleeve, and a fixing screw is installed in the screw hole, and the rod of the fixing screw passes through the corresponding through hole, and the head of the fixing screw and the outer cone surface of the front part of the air outlet sleeve jointly lock the corresponding outer cone ceramic protective sheet; or (3) a metal sheet or a metal wedge is inserted into the gap between the outer cone ceramic protective sheet and the inner wall of the first limiting slot. The above three fixing methods can be used alone or in combination.

[0058] When the end face ceramic protection sheet is installed in place in the second limiting slot, the two side walls of the end face ceramic protection sheet are usually in contact with the two side groove walls of the second limiting slot. After the end face ceramic protection sheet is installed in place in the second limiting slot, if there is still a small gap between the end face ceramic protection sheet and the inner wall of the second limiting slot, the end face ceramic protection sheet can be further fixed in the following ways: (1) high temperature resistant glue is injected into the gap between the end face ceramic protection sheet and the inner wall of the second limiting slot, and the end face ceramic protection sheet is bonded to the front end face of the front part of the air outlet sleeve and the side of the second pressure strip through the high temperature resistant glue; or (2) a through hole is provided on the end face ceramic protection sheet, and a screw hole is correspondingly provided on the front end face of the front part of the air outlet sleeve, and a fixing screw is installed in the screw hole, the rod of the fixing screw passes through the corresponding through hole, and the head of the fixing screw and the front end face of the air outlet sleeve jointly lock the corresponding end face ceramic protection sheet; or (3) a metal sheet or a metal wedge is inserted into the gap between the end face ceramic protection sheet and the inner wall of the second limiting slot. The above three fixing methods can be used individually or in combination.

[0059] Example 2

[0060] like Fig.11 As shown, the difference between the ceramic protective tuyere sleeve of this embodiment and embodiment 1 is that: a plurality of outer conical ceramic protective sheets 6 are arranged in a circle (a plurality of outer conical ceramic protective sheets are arranged at equal intervals), covering the entire outer conical surface 01 of the front part of the tuyere sleeve; a plurality of end surface ceramic protective sheets 9 are arranged in a circle (a plurality of end surface ceramic protective sheets 9 are arranged at equal intervals), covering the entire front end surface 02 of the tuyere sleeve.

[0061] The remaining structure of the ceramic-protected tuyere sleeve of the second embodiment is the same as that of the first embodiment.

[0062] Example 3

[0063] like Figure 12-14 As shown, the ceramic protective tuyere sleeve in this embodiment is different from that in Embodiment 1 in that:

[0064] In this embodiment, the first pressure strip 7 is fixedly mounted on the outer conical surface 01 of the front part of the tuyere sleeve by combining welding and connecting pieces. Specifically, the first pressure strip 7 is welded to the outer conical surface 01 of the front part of the tuyere sleeve, and the first pressure strip 7 is fixedly mounted on the outer conical surface 01 of the front part of the tuyere sleeve by connecting pieces (such as screws 12);

[0065] In this embodiment, the second pressure strip 9 is fixedly installed on the front end face 02 of the tuyere sleeve by combining welding and connecting parts. Specifically, the second pressure strip 9 is welded to the front end face 02 of the tuyere sleeve, and the second pressure strip 9 is fixedly installed on the front end face 02 of the tuyere sleeve by connecting parts (such as screws 13).

[0066] The remaining structure of the ceramic-protected tuyere sleeve of the third embodiment is the same as that of the first embodiment.

[0067] Example 4

[0068] like Fig.15 As shown, the difference between the ceramic-protected tuyere sleeve in this embodiment and that in Embodiment 3 is that: a plurality of outer conical ceramic protection sheets 6 are arranged in a circle (a plurality of outer conical ceramic protection sheets 6 are arranged at equal intervals), covering the entire outer conical surface 01 at the front of the tuyere sleeve; a plurality of end surface ceramic protection sheets 9 are arranged in a circle (a plurality of end surface ceramic protection sheets 9 are arranged at equal intervals), covering the entire front end surface 02 of the tuyere sleeve.

[0069] The remaining structure of the ceramic-protected tuyere sleeve of the fourth embodiment is the same as that of the third embodiment.

[0070] In other embodiments, the ceramic shield of the tuyere sleeve may include only an outer conical shield (i.e., the front end face shield is omitted relative to the above embodiments 1-4), or only include a front end face shield (i.e., the outer conical shield is omitted relative to the above embodiments 1-4).

Claims

1. A ceramic-protected tuyere sleeve, comprising a flange, an inner sleeve, an outer sleeve, a deflector and a ceramic shield, wherein the outer sleeve, the inner sleeve and the flange form an internal cavity, and the deflector is arranged in the internal cavity; the ceramic shield comprises an outer cone shield and / or a front face shield, characterized in that: The outer cone protection cover includes multiple outer cone ceramic protection plates, and multiple first pressure strips are arranged on the outer cone surface of the front part of the air outlet sleeve, and a first limiting slot is formed between two adjacent first pressure strips, and each outer cone ceramic protection plate is respectively installed in the corresponding first limiting slot; the front end face protection cover includes multiple end face ceramic protection plates, and multiple second pressure strips are arranged on the front end surface of the air outlet sleeve, and a second limiting slot is formed between two adjacent second pressure strips, and each end face ceramic protection plate is respectively installed in the corresponding second limiting slot.

2. The ceramic protective tuyere sleeve according to claim 1 is characterized in that: The first limiting slots are the same in number and correspond one-to-one with the outer conical ceramic protective sheets, and the shape and size of the first limiting slots match the outer conical ceramic protective sheets; the second limiting slots are the same in number and correspond one-to-one with the end face ceramic protective sheets, and the shape and size of the second limiting slots match the end face ceramic protective sheets.

3. The ceramic protective tuyere sleeve according to claim 1 or 2, characterized in that: The plurality of first pressure strips are arranged in sequence along the circumferential direction of the tuyere sleeve.

4. The ceramic protective tuyere sleeve according to claim 3 is characterized by: Each first pressure strip runs forward and backward, the width of the first limiting slot gradually decreases from back to front, and the width of the outer cone ceramic protection sheet gradually decreases from back to front; the rear end of the first limiting slot has an outer cone ceramic protection sheet insertion opening.

5. The ceramic protective tuyere sleeve according to claim 1 or 2, characterized in that: The cross-section of the first layering strip is trapezoidal in shape; in the cross-section of the first layering strip, the length of the outer side is greater than the length of the inner side.

6. The ceramic protective tuyere sleeve according to claim 1 or 2, characterized in that: The plurality of second pressure strips are arranged in sequence along the circumferential direction of the tuyere sleeve.

7. The ceramic protective tuyere sleeve according to claim 6 is characterized by: The second pressure strip is arranged radially, the width of the second limiting slot gradually decreases from the outside to the inside, and the width of the end surface ceramic protection sheet gradually decreases from the outside to the inside; the outer end of the second limiting slot has an end surface ceramic protection sheet insertion opening.

8. The ceramic protective tuyere sleeve according to claim 1 or 2, characterized in that: The cross-section of the second pressure strip is trapezoidal; in the cross-section of the second pressure strip, the length of the front side is greater than the length of the rear side.

9. The ceramic protective tuyere sleeve according to claim 1 or 2, characterized in that: The first layering strip and the second layering strip are made of copper, copper alloy or steel; The first pressure strip is welded to the outer conical surface of the front part of the tuyere sleeve; or the first pressure strip is fixedly mounted on the outer conical surface of the front part of the tuyere sleeve by a connecting piece; or the first pressure strip is fixedly mounted on the outer conical surface of the front part of the tuyere sleeve by a combination of welding and connecting pieces; The second pressure strip is welded to the front end face of the tuyere sleeve; or, the second pressure strip is fixedly mounted on the front end face of the tuyere sleeve via a connector; or, the second pressure strip is fixedly mounted on the front end face of the tuyere sleeve by a combination of welding and a connector.

10. The ceramic protective tuyere sleeve according to claim 1 or 2, characterized in that: The thickness of the outer cone ceramic protection sheet and the end surface ceramic protection sheet are both 5-30 mm; the length of the outer cone ceramic protection sheet is 30-200 mm.

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