CN216080986U

CN216080986U - Special-shaped ceramic plate and composite structure for refractory lining

Info

Publication number: CN216080986U
Application number: CN202120301903.9U
Authority: CN
Inventors: 刘礼龙
Original assignee: Tianjin Nanji Star Insulating Material Co ltd
Current assignee: Tianjin Nanji Star Insulating Material Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-03-18
Anticipated expiration: 2031-02-03

Abstract

The utility model provides a special-shaped ceramic plate and a composite structure thereof for a refractory lining. The composite structure of the refractory lining comprises a special-shaped ceramic plate, a pull-fixing rod and a connecting piece, wherein the pull-fixing rod penetrates through a through hole of a boss and is used for connecting a plurality of ceramic plates; the connecting piece is used for connecting the pull-fixing rod and the steel plate. And a thermal insulation material is arranged on one surface of the steel plate facing the special-shaped ceramic plate, and a pouring material is filled in a gap between the thermal insulation material and the special-shaped ceramic plate. The composite structure of the utility model enables the ceramic panel and the refractory castable material to be firmly combined. And the construction is very convenient, and the service life is ensured.

Description

Special-shaped ceramic plate and composite structure for refractory lining

Technical Field

The utility model belongs to the field of refractory materials, and relates to a mounting structure of a refractory material, in particular to a special-shaped ceramic plate and a composite structure thereof for a refractory lining.

Background

When two layers of different materials are used in a common refractory material, the material is generally built or cast in layers with a certain thickness, the thickness of the material must be large to a certain extent, for example, above 65mm, the material forms a self-stable structure, and if the thickness is too thin, the two materials delaminate due to different thermal expansion coefficients at high temperature, and an integral refractory lining cannot be well synthesized. The excessive thickness of the hot-face material can cause excessive cost, and the actual use condition can achieve the aim without the excessive thickness of the hot-face material.

If the thickness of the hot-face material is thin, for example, a plate-shaped hot-face material with the thickness of 10-50 mm is sufficient as a high-temperature-resistant anti-stripping anti-thermal shock-resistant anti-abrasion hot-face material of the hot face, but the thin hot-face material and the back refractory material are compounded and fixed into a problem, generally a high-temperature binder is adopted for cementation, but the hot-face material is very easy to fall off in high-frequency thermal shock and abrasion resistance, and the service life is very short. In addition, the installation method of the high-temperature metal pull-fixing rod is adopted, although the installation method can achieve a certain service life, the high-temperature metal pull-fixing rod is high in cost, and meanwhile, the slow oxidation ablation exists at high temperature, so that the service life is not stable and ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a composite structure of a special-shaped ceramic plate and a refractory lining thereof.

The technical scheme adopted by the utility model for solving the technical problem is as follows:

a special-shaped ceramic plate comprises a plate body, wherein a boss is integrally formed on one surface of the plate body and is perpendicular to the plate body, and a through hole is formed in the boss.

Preferably, the boss is formed on the longest symmetry axis of the plate body, and the length of the boss is slightly shorter than the longest symmetry axis of the plate body.

Preferably, the two through holes are symmetrically arranged at the middle lower part of the boss.

Preferably, one end of the boss connected with the plate body is made into a frustum shape, wherein an included angle between one surface of the frustum, which is in contact with the plate body, and the side wall of the frustum is 30-45 degrees; the other end of the boss is connected with the middle part of the boss through a transition frustum, and the included angle between the side wall of the transition frustum and the contact surface of the other end of the boss is 45-60 degrees.

A composite structure of a refractory lining comprises the special-shaped ceramic plate, and comprises the special-shaped ceramic plate, a pull fixing rod and a connecting piece, wherein the pull fixing rod penetrates through a through hole of a boss and is used for connecting a plurality of ceramic plates; the connecting piece is used for connecting the pull-fixing rod and the steel plate.

Preferably, the connecting piece is U-shaped, the opening end of the connecting piece is connected with the steel plate, and the sealing end of the connecting piece is connected with the two pull-fixing rods.

Preferably, the high-temperature ceramic fiber board is embedded between the board surface of the special-shaped ceramic board and the connecting piece.

Preferably, the casting material is filled in the gap between the steel plate and the special-shaped ceramic plate.

Preferably, a heat insulating material is arranged on one surface of the steel plate facing the special-shaped ceramic plate, and a pouring material is filled in a gap between the heat insulating material and the special-shaped ceramic plate.

Preferably, the special-shaped ceramic plate is 100-300 mm long, 100-300 mm wide and 15-50 mm high, the boss is 180mm long, and the boss is 35-45 mm thick.

Further preferably, the special-shaped ceramic plate is 100-150 mm thick, the boss height is 65-100 mm, the boss thickness is 35-45 mm, the two ends of the boss are perforated to be 11mm in diameter, the distance between the two is 40-150 mm, a perforation is formed in the bottom end of the boss, and a heat-resistant steel bar with the diameter of 10mm penetrates through the perforation.

Further preferably, a layer of 28-30 mm high-temperature ceramic fiber board is adopted to insulate the gap between the 6-8 mmU-diameter connecting piece and the special-shaped ceramic plate.

The utility model has the advantages and positive effects that:

1. the hot surface of the refractory lining adopts a special-shaped ceramic plate, the cold surface is made of another refractory castable material, the special-shaped ceramic plate and the cold surface are welded and fixed on a steel plate through a heat-resistant steel pull-fixing rod and a U-shaped connecting piece to form the refractory lining with excellent composite performance, and the ceramic panel and the refractory castable material are firmly combined.

2. A high-temperature ceramic fiber plate with the thickness of 28-30 mm is extruded between the ceramic plate and the U-shaped round steel connecting piece, so that the temperature can be greatly reduced, the temperature of the hot surface of the heat-resistant steel pulling and fixing rod and the U-shaped connecting piece is far lower than the long-term allowable service temperature of the heat-resistant steel, and the long-term service life of the heat-resistant steel pulling and fixing and connecting piece is prolonged.

Drawings

Fig. 1 is a front view of a shaped ceramic plate;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a schematic view of a composite structure;

fig. 5 is a sectional view taken along line a-a of fig. 4.

Detailed Description

The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the utility model.

A special-shaped ceramic plate is shown in figures 1-3 and comprises a plate body 1, wherein a boss 1-1 is integrally formed on one surface of the plate body, the boss is perpendicular to the plate body, and a through hole 1-2 is formed in the boss.

A composite structure of a special-shaped ceramic plate refractory lining comprises a special-shaped ceramic plate 1, pull-fixing rods 4, a U-shaped connecting piece 5 and a pouring material 2, wherein the special-shaped ceramic plate is a hot surface, the pouring material is a cold surface, a heat insulation material 6 is arranged on the coldest surface, and the special-shaped ceramic plate and the pouring material are connected through the pull-fixing rods and the connecting piece. The special-shaped ceramic plate is a rectangular plate, the pull fixing rod penetrates through the through hole to be used for serially connecting boss through holes of the special-shaped ceramic plates, the pull fixing rod is combined to the steel shell 7 through the U-shaped connecting piece, and a layer of 28-30 mm high-temperature ceramic fiber plate 3 is adopted to insulate heat and serve as a heat insulation layer in a gap between the combination position of the pull fixing rod and the U-shaped connecting piece and the special-shaped ceramic plate.

The special-shaped ceramic plate is made of silicon carbide, sintered silicon carbide or silicon nitride combined silicon carbide, the length and width of the special-shaped ceramic plate are 100-300 multiplied by 100-300 mm, and the thickness of the special-shaped ceramic plate is 25-50 mm. The castable of the cold surface is generally made of refractory amorphous materials, the thickness is generally 150-200 mm, and the coldest surface is made of heat insulation materials of about 100 mm.

The boss structure of the special-shaped ceramic plate is characterized in that one end, connected with the plate body, of the boss is made into a frustum shape, and an included angle between one surface, contacted with the plate body, of the frustum and the side wall of the frustum is 30-45 degrees; the other end of the boss is connected with the middle part of the boss through a transition frustum, and the included angle between the side wall of the transition frustum and the contact surface of the other end of the boss is 45-60 degrees. Besides ensuring the perforation strength, the structure can also provide additional extrusion and tensile force on the boss of the special-shaped ceramic plate generated by the casting material because the structure is embedded in the casting material.

Application examples

Cement clinker is often easily adhered to the cone body, the necking, the flue gas chamber, the high temperature of the wear-resistant pier of the grate cooler and other parts of the cement kiln, so that the smooth production is influenced, in order to clean the clinker adhered with the ring, the manual cleaning of production needs to be stopped, and the safety accident that high-temperature clinker burns workers often occurs.

The boss type silicon carbide deformed ceramic plate which is not adhered with cement clinker is adopted in a necking and a flue gas chamber simultaneously, the dimension of the deformed ceramic plate is 200 multiplied by 35mm and is used for contacting the hottest surface of a cement clinker refractory castable, the deformed ceramic plate is penetrated and fixed through a 2520 heat-resistant steel bar (a pull fixing rod) with the diameter of 10mm, then the deformed ceramic plate and a 304U-shaped heat-resistant round steel connecting piece with the diameter of 8mm are welded and fixed on a steel shell of the necking and the flue gas chamber, a 30mm ceramic fiber plate is extruded between the U-shaped connecting pieces and between the ceramic plates for heat insulation, and a heat insulation material of 100mm is laid on the side of the steel plate. When the castable is constructed, the castable enters a space between the special-shaped ceramic plate and the heat insulation material on the coldest surface, the thickness of the castable is 100-250 mm, and after the castable is solidified, dried, calcined and molded, the ceramic panel and the refractory castable form firm combination.

In the necking of a flue gas chamber for annual production of 5000 tons of cement clinker, a boss-shaped special-shaped ceramic plate pulling and fixing structure with the square length of 50 meters is adopted, so that the problem that the cement clinker is frequently adhered to a side wall refractory castable is completely solved, and after the original outcrop metal pulling and fixing rod structure is used for 6-12 months, the pulling and fixing rod is easy to burn and oxidize, so that a hot-face ceramic plate falls off; after the novel structure is adopted, the hot-face special-shaped ceramic plate is used for more than 20 months without any loosening and falling signs, the service life is synchronous with the pouring material of the cold face, and the improvement effect is very good.

Claims

1. A heterotype ceramic plate is characterized in that: the plate comprises a plate body, wherein a boss is integrally formed on one surface of the plate body, the boss is perpendicular to the plate body, a through hole is formed in the boss, one end, connected with the plate body, of the boss is made into a frustum shape, an included angle formed between one surface, in contact with the plate body, of the frustum and the side wall of the frustum is 30-45 degrees, the other end of the boss is connected with the middle of the boss through a transition frustum, and an included angle formed between the side wall of the transition frustum and the other end contact surface of the boss is 45-60 degrees.

2. A profiled ceramic plate as claimed in claim 1, wherein: the boss is formed on the longest symmetrical axis of the plate body, and the length of the boss is slightly shorter than the longest symmetrical axis of the plate body.

3. A profiled ceramic plate as claimed in claim 1, wherein: the two through holes are symmetrically arranged at the middle lower part of the boss.

4. A composite structure comprising a refractory lining of the profiled ceramic sheet defined in any one of claims 1 to 3, wherein: the special-shaped ceramic plate pulling device comprises a special-shaped ceramic plate, a pulling and fixing rod and a connecting piece, wherein the pulling and fixing rod penetrates through a through hole of a boss and is used for connecting a plurality of ceramic plates; the connecting piece is used for connecting the pull-fixing rod and the steel plate.

5. The composite structure of claim 4, wherein: the connecting piece is U-shaped, the opening end is connected with the steel plate, and the sealing end is connected with the two pull-fixing rods.

6. The composite structure of claim 4, wherein: the high-temperature ceramic fiber board is embedded in the gap between the board surface of the special-shaped ceramic board and the connecting piece.

7. The composite structure of claim 4 or 6, wherein: and filling a casting material in a gap between the steel plate and the special-shaped ceramic plate.

8. The composite structure of claim 4 or 6, wherein: and a thermal insulation material is arranged on one surface of the steel plate facing the special-shaped ceramic plate, and a pouring material is filled in a gap between the thermal insulation material and the special-shaped ceramic plate.

9. The composite structure of claim 8, wherein: the thickness of the plate body of the special-shaped ceramic plate is 25-50 mm, the thickness of the casting material is 150-200 mm, and the thickness of the heat insulation material is 90-110 mm.