CN114621776B - Coke tank bottom gate lining plate compounded with high-temperature ceramic piece and preparation method - Google Patents
Coke tank bottom gate lining plate compounded with high-temperature ceramic piece and preparation method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
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- C04B2235/3427—Silicates other than clay, e.g. water glass
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- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3481—Alkaline earth metal alumino-silicates other than clay, e.g. cordierite, beryl, micas such as margarite, plagioclase feldspars such as anorthite, zeolites such as chabazite
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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Abstract
The coke tank bottom gate lining plate compounded with the high-temperature ceramic parts comprises a bottom plate, wherein at least two high-temperature ceramic parts are connected to the position, which is easy to be impacted, of the bottom gate lining plate through bolts, and the rest part is at least two castable layers; the pouring material layer consists of a positioning bracket connected to the bottom plate, a reinforcing piece connected with the positioning bracket and pouring materials. The preparation method comprises the following steps: firstly, mixing all solid raw materials and liquid raw materials of a high-temperature ceramic part; manufacturing a high-temperature ceramic piece; fastening the bottom plate with bolts; welding a positioning bracket on the bottom plate, connecting the reinforcing piece to the positioning bracket, and naturally drying for 1-2 days after pouring of the pouring material layer is completed; the baking is carried out before the use and then the baking is put into use. The invention has good rapid cooling and rapid heating resistance, is not easy to crack, can solve the problems of rapid heat transfer, low strength, easy burning loss and the like of the lining plate of the coke tank bottom gate, prolongs the service cycle of the lining plate to more than 4.5 months, can reduce the temperature of the outer surface of the bottom of the coke tank bottom gate by at least 100 ℃ and reduces the cost by at least 30 percent.
Description
Technical Field
The invention relates to the technical field of dry quenching in the coking industry, in particular to a coke tank bottom gate lining plate compounded with a high-temperature ceramic piece and a preparation method thereof.
Background
The rotary coke tank mainly comprises a coke tank body, a lining plate, a suspender, a transmission rod, an annular octagonal beam, a guide wheel set, a bottom gate, a buffer seat, refractory materials, a lubricating pipeline and the like. The coke drum lining plate is used as a component in direct contact with red and hot coke, and the part of the material needs to have strong heat resistance and wear resistance, strength and toughness in a hot state and the capability of adapting to alternating cold and hot. The lining plate material cone section and the lining plate of the bottom gate part are made of heat-resistant cast steel ZG35Cr24Ni7SiN, heat-resistant stainless steel 20X23H18 and the like, and the lining plate has good wear resistance and heat resistance and can resist 1100 ℃ in a short time. Some lining plates of coke tank parts of companies are made of heat-resistant stainless steel, and connecting bolts contacted with red coke are made of large square head structures and stainless steel, so that the lining plates are firmly and reliably connected with a coke tank framework; so as to prolong the service life of the lining board and avoid the premature damage of the lining board.
The bottom gate lining plate of the coke dry quenching tank has a service life of only 3 months or even lower due to the direct impact and abrasion of coke; the replacement of the coke tank bottom gate lining plate is too frequent, the maintenance cost is high, and if the damaged lining plate falls into the dry quenching furnace, the body health of an maintainer can be seriously threatened in the treatment process; the lining board falls off and burns out in the using process of the coke tank bottom gate lining board, various equipment problems are caused, and the normal production of the dry quenching is affected.
And (3) searching:
the document with the Chinese patent publication number of CN212316016 discloses an anti-falling fast-assembled wear-resistant composite coke tank lining plate and a dry quenching coke tank. The lining board consists of a supporting plate and a wear-resistant composite layer; the supporting plate is positioned at the outer side of the wear-resistant composite layer, and a lining plate fixing mechanism for fixing the lining plate and the dry quenching coke tank is arranged at the outer side surface of the supporting plate. The tank body is provided with a straight rib plate and a reinforcing ring, the reinforcing ring is arranged along the circumferential direction of the tank body, the straight rib plate and the reinforcing ring are intersected to form a plurality of frames, and the lining plate fixing mechanism comprises a locker, a locking hook frame, a movable locking hook and a lower locking plate; the lining board is installed on the corresponding frame, the lock hook frame is connected with the movable lock hook to be correspondingly interlocked, and the lower lock plate extends downwards from the lining board and is limited and supported on the reinforcing ring. Its advantages are high resistance to high temp, high antiwear nature, low heat conductivity, and less burning loss. The problem is that the thin part of the coke tank bottom gate is only 20mm, namely 60-80mm thick, and if the straight rib plate and the reinforcing ring are arranged, the coke tank bottom gate cannot be protected and is easy to burn.
According to the document of Chinese patent publication No. CN111978077A, the dry quenching coke tank and bin body working lining is made of a composite refractory material containing cordierite, and the raw material is prepared from, by weight, 20-45 parts of 1-3mm electric mullite, 10-45 parts of 3-5 mm electric mullite, 10-20 parts of 0-1mm cordierite, 15-40 parts of 1-3mm cordierite, 5-20 parts of 200-mesh corundum fine powder, 3-8 parts of silicon nitride fine powder, 4-15 parts of calcium aluminate cement, 2-6 parts of silicon fine powder, 1-7 parts of alumina fine powder and 0.5-2 parts of asbestos fiber, wherein the addition amount of the composite additive is 0.1-10% of the total weight of the raw material; the material has better smearing performance, is used for positions such as difficult construction, narrow space, irregular working surface and the like, solves the problem of low overall service life of the coke tank caused by serious deformation, crack and abrasion of the heat-resistant steel lining plate, improves the service life and the operation rate of the tank body, and saves energy and reduces consumption. The problem is that the coating has low strength, poor rapid cooling and rapid heating resistance and easy peeling and breakage.
In the document with the Chinese patent application number of CN202010270638.2, according to the energy-saving Jiao Guanchao temperature pouring method, the pouring space of the refractory lining is increased for the coke tank bottom gate; welding butterfly-shaped anchor nails on the inner wall of the coke tank, pasting the inner surface of the coke tank by using a low-heat-conduction polymer combined nanometer heat-insulating plate, and painting with asphalt paint twice; then supporting the mould, firstly pouring the bottom gate and the lower cone section, starting to support the mould by the inclined cone section after pouring and solidification are completed, and then pouring by the straight section; the invention solves the problems that the shell of the original coke tank has high temperature, the frame is easy to crack and deform, the lining plate is easy to oxidize, crack and deform, abrade and fall off and the lining plate is frequently replaced due to high temperature. The problem is that the water content of the castable is higher, the space on the bottom gate is limited and thinner, the self rapid cooling and rapid heating resistance of the castable is not strong, the expansion coefficient of the butterfly-shaped anchor nails is different from that of the castable, the use frequency of the bottom gate is 30-70 times per day, the service life of the bottom gate is generally 3-6 months or higher, the anchor nails are abnormally expanded, and the castable is cracked and peeled off, particularly at the bottom gate part, and the breakage is very serious.
The publication of journal of refractory materials at pages 2017,51 (1) 63-64 describes the use of lightweight refractory castable in the lining of a coke drum associated with a dry quenching furnace. In order to reduce material purchase and maintenance cost of the coke tank lining, improve heat preservation performance and heat recovery rate of the coke tank and reduce equipment faults of a coke dry quenching furnace, the use effect of using a light refractory castable to replace an alloy lining plate as the coke tank lining is explored. The high-strength mullite light castable and the high-strength light castable are respectively used as lining materials of the lower cone section and the straight section of the coke tank. Although the lining has good heat preservation effect, the temperature of the outer wall surface of the tank is reduced from 500 ℃ to 150 ℃, the heat loss of red coke and the damage of high temperature to the tank body and surrounding components are greatly reduced, the problem that a lining plate falls off and enters a dry quenching furnace to block a rotary sealing valve is solved, the potential safety hazard is eliminated, and the economic benefit is obvious, but the problem is that the light castable has low strength, poor wear resistance, no rapid cooling and rapid heating resistance and easy peeling and breakage.
The casting material of the document with the Chinese patent publication number of CN110668832A comprises the following components: alumina with the thickness of less than or equal to 5 mm: 30-68 parts; alumina hollow sphere with granularity less than or equal to 3 mm: 10-45 parts; alumina micropowder: 1-5 parts; silicon micropowder: 5-12 parts; pure calcium aluminate cement: 3-10 parts; dispersing agent: 0.1 to 1 part; explosion-proof agent: 0.1 to 1 part; tartaric acid: 0.02 to 0.03 portion. The wear-resistant castable for the coke tank has good compressive strength, flexural strength and wear resistance, but has the problems of poor rapid cooling and rapid heating performance, easiness in cracking and unsuitable use for a thin-layer bottom gate.
The castable for the coke tank lining, disclosed in Chinese patent publication No. CN109704792A, comprises the following raw materials in percentage by weight: bauxite with granularity ranging from 5mm to 8 mm: 10% -22%; calcium hexaluminate with particle size ranging from 3mm to 5 mm: 20% -38%; calcined quartz with particle size ranging from 1mm to 3 mm: 6% -10%; forsterite with a particle size of less than or equal to 1 mm: 11% -21%; magnesium aluminate spinel with 180 mesh granularity: 9% -19%; ethyl silicate: 2% -7%; hydrated alumina having a particle size of less than 0.088 mm: 2% -10%; dextrin: 1% -4%; water reducing agent: 1 to 3 percent. The problem of the castable is the same as that of the document with the publication No. CN110668832A, namely, the castable with alumina has poor rapid cooling and heating performance, is easy to crack, and is not suitable for a thin-layer bottom gate.
Chinese patent publicationThe high thermal shock resistance wear-resistant prefabricated part for the dry quenching coke tank is prepared from the following raw materials in parts by weight: 20-30 parts of silicon carbide whisker; 40-60 parts of bauxite-based homogeneous material; 5-10 parts of silica micropowder; 1-3 parts of water; 0.2-0.6 part of water reducer; alpha-Al 2 O 3 15-20 parts of powder; 8-12 parts of MoSi2 powder; wherein the diameter of the silicon carbide whisker is 0.1-2 um, the length is 20-300 um, and the appearance is powdery; the alumina content in the alumina-based homogeneous material is 88wt%, the bauxite ore green compact with 75wt% alumina content is prepared by firing at 1500-1600 ℃ for 4h, and the volume density after firing is 2.92-3.43 g.cm -3 . The high thermal shock resistance wear-resistant prefabricated member for coke dry quenching tank uses silicon carbide whisker, alumina base homogeneous material and silicon dioxide micropowder as base material, and alpha-Al is sprayed on the surface 2 O 3 And MoSi 2 The powder is high-temperature resistant, corrosion resistant, wear resistant, thermal shock resistant and excellent in chilling and heat resistant performance. The problems of the gate are that the gate is poor in rapid cooling and rapid heating performance, easy to crack and unsuitable for a thin-layer bottom gate.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the coke tank bottom gate lining board provided with the prefabricated member, which prolongs the service life of the coke tank bottom gate lining board from no more than 3 months to more than 4.5 months, does not cause cracking caused by expansion, and can reduce the external temperature of the bottom gate by at least 100 ℃ and reduce the cost by at least 30%.
Measures for achieving the above object:
the utility model provides a with high temperature ceramic spare complex burnt tank bottom gate welt, includes bottom plate, its characterized in that: at least two high-temperature ceramic parts are connected to the position which is easy to be impacted on the bottom gate lining plate through bolts, and the rest part is at least two casting material layers; the pouring material layer consists of a positioning bracket connected to the bottom plate, a reinforcing piece connected with the positioning bracket and pouring materials.
The method comprises the following steps: the high-temperature ceramic part for compounding comprises the following raw materials in percentage by weight: sintered or fused mullite with granularity of 5-1 mm: 30-40%; sillimanite with granularity of 3-1 mm: 5-15%; andalusite with granularity smaller than 0.01 mm: 5-10%; sintered or fused mullite powder having a particle size of less than 0.088 mm: 25-40%; silicon carbide with granularity of 1-0.1 mm: 3-9%; cordierite powder with particle size less than 0.074 mm: 3-10%; magnesium sulfate: 0.1 to 1 percent; aluminum sulfate: 0.1 to 1 percent; 0.5 to 2 percent of calcium lignin sulfonate.
Preferably: the high-temperature ceramic piece is provided with a bolt hole; the bolts sink at least 5mm on the surface of the high-temperature ceramic piece.
The method comprises the following steps: the raw materials of the high-temperature ceramic piece are mixed and pressed into a compact blank body, and then baked for not less than 24 hours at the temperature of 110-200 ℃,
firing at 1350-1450 deg.C, preserving heat for 4-12h, and slowly cooling for standby.
The method comprises the following steps: the castable is high-alumina castable with alumina content not less than 60%; the performance index is as follows: the thermal shock resistance index is: the water cooling circulation times at 1100 ℃ are not less than 30 times, and the normal temperature compressive strength after burning at 1100 ℃ is not less than 80MPa.
The method comprises the following steps: the height of the positioning support is not more than two thirds of the thickness of the high-temperature ceramic piece.
The method comprises the following steps: the locating support and the reinforcing piece are coated with organic paint or oil paint.
The method comprises the following steps: the use temperature of the positioning support and the reinforcing piece is not lower than 1000 ℃.
A preparation method of a coke tank bottom gate lining plate compounded with a high-temperature ceramic piece comprises the following steps:
1) Firstly, weighing all solid raw materials of the high-temperature ceramic part according to a proportion, and uniformly mixing the solid raw materials with liquid raw materials;
2) After being mixed and pressed into a compact blank, the compact blank is baked at the temperature of 110-200 ℃ for not less than 24 hours, is baked at the temperature of 1350-1450 ℃, is kept warm for 4-12 hours, and is slowly cooled for standby;
3) Fastening the high-temperature ceramic part with the bottom plate by bolts;
4) Welding a positioning bracket on the bottom plate, connecting the reinforcing piece to the positioning bracket, and naturally drying for 1-2 days after pouring of the pouring material layer is completed;
5) Before use, the mixture is baked for 5 to 12 hours at the temperature of 100 to 200 ℃ and then put into use.
The action and mechanism of each raw material and main process in the invention
The high-temperature ceramic part comprises the following raw materials:
sintered or fused mullite with granularity of 5-1 mm: 30-40%; the invention mainly plays roles of aggregate and skeleton to enhance the wear resistance of high-temperature ceramic parts, but when the addition amount is less than 30 percent, the problems of less aggregate, more fine powder and large shrinkage after burning are generated; when the addition amount is higher than the limited 40%, the problems of more aggregate, less fine powder and non-compact combination are generated, so the addition amount is limited to 30-40%; otherwise, if the particle size is out of the defined range, quality fluctuation occurs, and the pressed green body is liable to crack.
Sillimanite with granularity of 3-1 mm: 5-15% of the additive mainly plays a role of fine aggregate, and can reduce the volume shrinkage of the product after firing through mullite formation in the high-temperature firing process, but when the additive amount is less than 5% of the additive, the expansion is smaller and the effect is not great; when the addition amount is more than 15% of the limit, the expansion is too large, so that cracks are generated after burning, and the addition amount is limited to 5-15%; and if the granularity is beyond the limited range, quality fluctuation can be generated, and the appearance and the dimensional stability of the product are affected.
Andalusite with granularity smaller than 0.01 mm: 5-10% of the additive mainly plays a role of an expanding agent, and can reduce the volume shrinkage of the product after firing through mullite formation in a high-temperature firing process, but when the additive amount is less than 5% of the defined additive amount, the produced expansion is smaller and the effect is not great; when the addition amount is more than 10% of the limit, the expansion is too large, so that cracks are generated after burning, and the addition amount is limited to 5-10%; and if the granularity is beyond the limited range, quality fluctuation can be generated, and the appearance and the dimensional stability of the product are affected.
Sintered or fused mullite powder having a particle size of less than 0.088 mm: 25-40%, which mainly plays a role of matrix fine powder, achieves compact structure through high-temperature sintering, and when the addition amount of the matrix fine powder is less than 25% of that defined, the fine powder is less, aggregate cannot be wrapped, and the matrix fine powder is easy to crack; when the amount of the fine powder is more than the defined amount of 40%, cracks may occur due to shrinkage after firing, so that the amount is defined to be 25 to 40%.
Silicon carbide with granularity of 1-0.1 mm: 3-9%, which mainly plays a role in enhancing the hardness and wear resistance of the matrix, when the addition amount is less than 3% defined, the content of the fine powder is small, and the strengthening effect is not obvious; when the amount of the additive is more than 9% as defined, the melting point is high and sintering is not easy, so that the amount of the additive is limited to 3 to 9%. And if the particle size is outside the defined range, oxidation of the silicon carbide during use may be easily caused.
Cordierite powder with particle size less than 0.074 mm: 3-10%, which mainly plays a role in improving the thermal shock resistance of the matrix, when the addition amount is less than 3% of the limit, the content of the fine powder is small, and the effect is not obvious; when the amount of the additive is more than the above-mentioned 10%, the amount of the additive is limited to 3 to 10% because the inclusion of the impurity lowers the melting point and affects the high-temperature properties.
Magnesium sulfate: 0.1 to 1 percent, which mainly plays a role of a binding agent in the invention, and when the addition amount is less than 0.1 percent, the effect is not obvious; when the amount of the additive is more than 1% as defined, the amount of the additive is limited to 0.1 to 1% because the carried-in substance contains impurities, S volatilizes, and the environment is affected.
Aluminum sulfate: 0.1 to 1 percent, which mainly plays a role of a binding agent in the invention, and when the addition amount is less than 0.1 percent, the effect is not obvious; when the amount of the additive is more than 1% as defined, the amount of the additive is limited to 0.1 to 1% because the carried-in substance contains impurities, S volatilizes, and the environment is affected.
Calcium lignosulfonate: 0.5 to 2 percent, which mainly plays a role of a binding agent in the invention, and when the addition amount is less than 0.5 percent, the effect is not obvious; when the addition amount is more than 3% as defined, the addition amount is defined to be 0.5 to 2% because the inclusion thereof contains organic volatile matters, which affects the compactibility of the green body.
The castable is high-alumina castable with the alumina content not less than 60%, and when the alumina content is more than 60% defined, the service performance of the castable is affected; the running times of the coke tank bottom gate in each day are tens of times, and the thermal shock resistance stability requirement is high after long-term use, so the thermal shock resistance stability index is as follows: the water cooling circulation times at 1100 ℃ are not less than 30 times, and the normal temperature compressive strength after burning at 1100 ℃ is not less than 80MPa.
Compared with the prior art, the invention has the advantages of good quenching and rapid heating resistance, difficult cracking, capability of solving the problems of quick heat transfer, low strength, easy burning loss and the like of the lining plate of the coke tank bottom gate, prolonging the service period of the lining plate from 1-3 months to more than 4.5 months, reducing the temperature of the outer surface of the bottom of the coke tank bottom gate by at least 100 ℃ and reducing the cost by at least 30%.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1-bottom plate, 2-locating support, 3-reinforcement, 4-castable, 5-castable layer, 6-bolt, 7-high temperature ceramic piece, 8-bolt hole.
Detailed Description
The invention is described in detail below with reference to the attached drawings:
the coke tank bottom gate lining plate compounded with the high-temperature ceramic parts comprises a bottom plate 1, wherein at least two high-temperature ceramic parts 7 are connected to the parts, which are easy to be impacted, of the bottom gate lining plate through bolts 6, and the rest parts are at least two castable layers 5; the castable layer 5 consists of a positioning bracket 2 welded on the bottom plate 1, a reinforcing piece 3 welded with the positioning bracket 2 and castable 4; the high-temperature ceramic piece 7 is provided with a bolt hole 8.
The bolts 6 sink at least 5mm, preferably 7mm, on the surface of the high-temperature ceramic piece 7; the reinforcement 3 is coated with an organic coating or paint; the use temperature of the reinforcement 3 and the positioning bracket 2 is not lower than 1000 ℃; the height of the positioning bracket 2 is not more than two thirds of the thickness of the high-temperature ceramic piece.
The high-temperature ceramic piece is installed in place by the coke tank bottom gate lining board, and the pouring material layer is poured, and then the coke tank bottom gate lining board is naturally dried for 1 to 2 days; before use, the baking is carried out for 5 to 12 hours at any temperature of 100 to 200 ℃ so as to be put into use.
Table 1 shows a raw material composition value list of each example of the high-temperature ceramic part of the invention;
table 2 is a listing of the main process parameters for each example of the high temperature ceramic part of the present invention;
table 3 shows a list of performance tests for various examples of high temperature ceramic articles of the present invention.
The inventive examples produced the liner according to the following steps:
1) Firstly, weighing all solid raw materials of the high-temperature ceramic part according to a proportion, and uniformly mixing the solid raw materials with liquid raw materials;
2) After being mixed and pressed into a compact blank, the compact blank is baked at the temperature of 110-200 ℃ for not less than 24 hours, is baked at the temperature of 1350-1450 ℃, is kept warm for 4-12 hours, and is slowly cooled for standby;
3) Fastening the high-temperature ceramic part with the bottom plate by bolts;
4) Welding a positioning bracket on the bottom plate, connecting the reinforcing piece to the positioning bracket, and naturally drying for 1-2 days after pouring of the pouring material layer is completed;
5) Before use, the mixture is baked for 5 to 12 hours at the temperature of 100 to 200 ℃ and then put into use.
TABLE 1 list of raw material compositions (wt%) for each example of the high temperature ceramic part of the present invention
TABLE 2 list of the main process parameters for each example of the high temperature ceramic part of the present invention
TABLE 3 list of results of performance tests for various embodiments of the high temperature ceramic part of the present invention
Using one of the above high temperature ceramic parts, the use of the above embodiment is followed: after trial for 4 months, no cracking or falling off phenomenon is found, and the product can be used continuously; through testing, the external temperature of the bottom of the coke tank bottom gate is reduced by 120 ℃ compared with the prior art. As compared with the original operation for 1 month, the operation cost is reduced by about 34 percent through preliminary statistics.
This embodiment is merely a best example and is not intended to limit the implementation of the technical solution of the present invention.
Claims (7)
1. The utility model provides a with high temperature ceramic spare complex burnt tank bottom gate welt, includes bottom plate, its characterized in that: at least two high-temperature ceramic parts are connected to the position which is easy to be impacted on the bottom gate lining plate through bolts, and the rest part is at least two casting material layers; the pouring material layer consists of a positioning bracket connected to the bottom plate, a reinforcing piece connected with the positioning bracket and pouring materials;
the high-temperature ceramic part comprises the following raw materials in percentage by weight: sintered or fused mullite with granularity of 5-1 mm: 30-40%; sillimanite with granularity of 3-1 mm: 5-15%; andalusite with granularity smaller than 0.01 mm: 5-10%; sintered or fused mullite powder having a particle size of less than 0.088 mm: 25-40%; silicon carbide with granularity of 1-0.1 mm: 3-9%; cordierite powder with particle size less than 0.074 mm: 3-10%; magnesium sulfate: 0.1 to 1 percent; aluminum sulfate: 0.1 to 1 percent; 0.5 to 2 percent of calcium lignin sulfonate.
2. A coke drum bottom gate liner composite with a high temperature ceramic part as claimed in claim 1, wherein: the high-temperature ceramic piece is provided with a bolt hole; the bolts sink at least 5mm on the surface of the high-temperature ceramic piece.
3. A coke drum bottom gate liner composite with a high temperature ceramic part as claimed in claim 1, wherein: the castable is high-alumina castable with alumina content not less than 60%; the performance index is as follows: the thermal shock resistance index is: the water cooling circulation times at 1100 ℃ are not less than 30 times, and the normal temperature compressive strength after burning at 1100 ℃ is not less than 80MPa.
4. A coke drum bottom gate liner composite with a high temperature ceramic part as claimed in claim 1, wherein: the height of the positioning support is not more than two thirds of the thickness of the high-temperature ceramic piece.
5. A coke drum bottom gate liner composite with a high temperature ceramic part as claimed in claim 1, wherein: the use temperature of the positioning support and the reinforcing piece is not lower than 1000 ℃.
6. A coke drum bottom gate liner composite with a high temperature ceramic part as claimed in claim 1, wherein: the locating support and the reinforcing piece are coated with organic paint or oil paint.
7. The method for preparing the coke tank bottom gate lining plate compounded with the high-temperature ceramic piece, as claimed in claim 1, comprising the following steps: the method comprises the following steps:
1) Firstly, weighing all solid raw materials of the high-temperature ceramic part according to a proportion, and uniformly mixing the solid raw materials with liquid raw materials;
2) After being mixed and pressed into a compact blank, the compact blank is baked at the temperature of 110-200 ℃ for not less than 24 hours, is baked at the temperature of 1350-1450 ℃, is kept warm for 4-12 hours, and is slowly cooled for standby;
3) Fastening the high-temperature ceramic part with the bottom plate by bolts;
4) Welding a positioning bracket on the bottom plate, connecting the reinforcing piece to the positioning bracket, and naturally drying for 1-2 days after pouring of the pouring material layer is completed;
5) Before use, the mixture is baked for 5 to 12 hours at the temperature of between 110 and 200 ℃ and then put into use.
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| CN202210300389.6A CN114621776B (en) | 2022-03-24 | 2022-03-24 | Coke tank bottom gate lining plate compounded with high-temperature ceramic piece and preparation method |
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| CN107768340A (en) * | 2017-09-14 | 2018-03-06 | 株洲中车时代电气股份有限公司 | A kind of power model ceramic lining plate |
| CN111662730A (en) * | 2020-06-17 | 2020-09-15 | 武汉钢铁有限公司 | Composite lining plate for splicing coke tank and preparation method |
| CN214199700U (en) * | 2020-12-02 | 2021-09-14 | 天津水泥工业设计研究院有限公司 | High-temperature-resistant dew point corrosion-resistant energy-saving composite lining |
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| JP2008044814A (en) * | 2006-08-15 | 2008-02-28 | Ngk Insulators Ltd | Ceramic composite material and bottom board for firing |
| CN102161590B (en) * | 2010-02-24 | 2013-09-04 | 山东耐材集团鲁耐窑业有限公司 | Mullite-andalusite product for key position of dry quenching device and preparation method thereof |
| LU91767B1 (en) * | 2010-12-17 | 2012-06-18 | Wurth Paul Sa | Ceramic bottom lining of a blast furnace hearth |
| CN202327154U (en) * | 2011-10-12 | 2012-07-11 | 山东博润工业技术有限公司 | Metal ceramic compound wear resistant valve |
| WO2020030598A1 (en) * | 2018-08-06 | 2020-02-13 | Basf Se | Device comprising a pressure-bearing device shell and an interior scaffolding system |
| CN110588091B (en) * | 2019-08-30 | 2022-05-10 | 吴葵阳 | Super wear-resistant steel-ceramic composite wear-resistant lining plate and forming method thereof |
| CN112876198B (en) * | 2021-03-31 | 2022-02-18 | 武汉钢铁有限公司 | Coating for baking-free coke tank lining plate and using method thereof |
| CN112979330B (en) * | 2021-03-31 | 2022-03-01 | 武汉钢铁有限公司 | Carbon deposition prevention coating material for coke pot lining plate and use method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768340A (en) * | 2017-09-14 | 2018-03-06 | 株洲中车时代电气股份有限公司 | A kind of power model ceramic lining plate |
| CN111662730A (en) * | 2020-06-17 | 2020-09-15 | 武汉钢铁有限公司 | Composite lining plate for splicing coke tank and preparation method |
| CN214199700U (en) * | 2020-12-02 | 2021-09-14 | 天津水泥工业设计研究院有限公司 | High-temperature-resistant dew point corrosion-resistant energy-saving composite lining |
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