CN114621776A - Coke pot bottom gate lining plate compounded with high-temperature ceramic part and preparation method thereof - Google Patents
Coke pot bottom gate lining plate compounded with high-temperature ceramic part and preparation method thereof Download PDFInfo
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- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
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- 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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- C04B2235/3481—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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Abstract
A coke pot bottom gate lining plate compounded with high-temperature ceramic pieces comprises a bottom plate, wherein at least two high-temperature ceramic pieces are connected to the position, which is easy to be impacted, of the bottom gate lining plate through bolts, and the rest parts are 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 preparation method comprises the following steps: firstly, mixing all solid raw materials and liquid raw materials of a high-temperature ceramic piece; manufacturing a high-temperature ceramic piece; fastening the bottom plate by using bolts; welding a positioning support on the bottom plate, connecting the reinforcing piece to the positioning support, and naturally drying for 1-2 days after pouring of a pouring material layer is completed; the product can be used after baking before use. The invention has good performance of resisting rapid cooling and rapid heating, 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 life of the lining plate to more than 4.5 months, can reduce the external surface temperature 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, and mainly relates to a coke tank bottom gate lining plate compounded with a high-temperature ceramic part and a preparation method thereof.
Background
The rotary coke tank mainly comprises a coke tank body, a lining plate, a hanging rod, 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 part which is in direct contact with red hot coke, and the material of the part needs stronger heat resistance and wear resistance, strength and toughness in a hot state and the performance of adapting to the alternating change of cold and heat. The conical section of the lining plate and the bottom gate part lining plate are made of heat-resistant cast steel ZG35Cr24Ni7SiN, heat-resistant stainless steel 20X23H18 and the like, have good wear resistance and heat resistance, and can resist 1100 ℃ of heat in a short time. The lining plate of the coke tank of some companies is made of heat-resistant stainless steel, the connecting bolt in contact with the red coke is made of stainless steel with a large square head structure, and the connecting mode of the lining plate and the coke tank framework is firmer and more reliable; to improve the life of the lining plate and avoid premature damage.
The service life of the lining plate of the bottom gate of the coke dry quenching tank is only 3 months or even lower due to the direct impact and abrasion of coke; the coke tank bottom gate lining plate is replaced too frequently, the maintenance cost is high, and if the damaged lining plate falls into the dry quenching furnace, the physical health of maintainers can be seriously threatened in the treatment process; the lining board falls off, burns out and causes various equipment problems in the use process of the lining board of the coke tank bottom gate, and the normal production of dry quenching is influenced.
After retrieval:
chinese patent publication No. CN212316016 discloses an anti-drop ready-package wear-resistant composite coke tank lining plate and a coke dry quenching tank. The lining plate consists of a supporting plate and a wear-resistant composite layer; the supporting plate is positioned outside the wear-resistant composite layer, and the outer side surface of the supporting plate is provided with a lining plate fixing mechanism for fixing the lining plate and the coke dry quenching tank. 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 latch hook frame, a movable latch hook and a lower lock plate; the lining plate is arranged on the corresponding frame, the locking hook frame is correspondingly interlocked with the movable locking hook, and the lower locking plate extends downwards from the lining plate and is supported on the reinforcing ring in a limiting way. Its advantages are high resistance to high temp, abrasion and low heat conductivity, and not burning easily. The problem is that the thin part of the coke tank bottom gate is only 20mm, the thick part is 60-80mm, 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.
The Chinese patent publication No. CN111978077A discloses a composite refractory material containing cordierite for a coke dry quenching tank and a bin body working lining, wherein the raw materials comprise, by weight, 20-45 parts of 1-3mm fused mullite, 10-45 parts of 3-5 mm fused 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 silica micropowder, 1-7 parts of alumina micropowder, 0.5-2 parts of asbestos fiber and 0.1-10% of a composite additive based on the total weight of the raw materials; the material has good smearing performance, is used for positions with 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, cracks and abrasion of the heat-resistant steel lining plate, improves the service life and the operating rate of the tank body, and saves energy and reduces consumption. The problems are that the strength of the coating is low, the performance of rapid cooling and rapid heating resistance is poor, and the coating is easy to peel and damage.
In the document with the Chinese patent application number of CN202010270638.2, in the energy-saving type coke tank over-temperature pouring method, a bottom gate of a coke tank is added with a refractory lining pouring space; welding butterfly-shaped anchoring nails on the inner wall of the coke tank, adhering the inner surface of the coke tank by using low-heat-conduction polymers to combine with the nano heat-insulation board, and then painting by using asphalt paint for two times; then, formwork supporting is carried out, a bottom gate and a lower cone section are cast, after the casting is finished and solidified, formwork supporting of an oblique cone section is started, and then straight section casting is carried out; the invention solves the problems that the original coke tank shell has high temperature, the frame is easy to crack and deform, the lining plate is easy to oxidize, crack and deform, wear and drop due to high temperature and the lining plate is frequently replaced. The problem is that the castable has high water content, the space on the bottom gate is limited and thin, the self rapid cooling and heating resistance of the castable is not strong, the expansion coefficients of the butterfly-shaped anchoring nail and the castable are different, 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 even longer, the anchoring nail abnormally expands, the castable is cracked and peeled off, and the castable is very seriously damaged particularly at the position of the bottom gate.
Journal of refractory materials on pages 63-64 of 2017,51(1) discloses the use of lightweight refractory castable materials in the lining of coke drums associated with dry coke extinguishers. In order to reduce the material purchase and maintenance cost of the coke tank lining, improve the heat preservation performance and the heat recovery rate of the coke tank and reduce the equipment failure of a dry quenching furnace, the use effect of applying the 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 selected as lining materials of the lower conical section and the straight section of the coke oven. The thermal insulation effect of the inner lining is good, the surface temperature of the outer wall 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, potential safety hazards are eliminated, and the economic benefit is remarkable.
The Chinese patent publication No. CN110668832A, the castable comprises the following components: alumina with the diameter less than or equal to 5 mm: 30-68 parts of a solvent; alumina hollow spheres with the particle size less than or equal to 3 mm: 10-45 parts; alumina micropowder: 1-5 parts; silicon micropowder: 5-12 parts of a solvent; pure calcium aluminate cement: 3-10 parts; dispersing agent: 0.1-1 part; explosion-proof agent: 0.1-1 part; tartaric acid: 0.02-0.03 part. The wear-resistant castable for the coke pot has good compressive strength, breaking strength and wear resistance, but has the problems that the castable with alumina has poor rapid cooling and rapid heating performance, is easy to crack and is not suitable for a thin-layer bottom gate.
The castable for the coke pot lining, disclosed in Chinese patent publication No. CN109704792A, comprises the following raw materials in percentage by weight: high bauxite with a particle size in the range of 5mm to 8 mm: 10% -22%; calcium hexaluminate having a particle size in the range of 3mm to 5 mm: 20 to 38 percent; calcined quartz with a particle size in the range of 1mm to 3 mm: 6 to 10 percent; forsterite having a particle size of 1mm or less: 11 to 21 percent; magnesium aluminate spinel with 180 mesh particle size: 9% -19%; ethyl silicate: 2 to 7 percent; hydrated alumina with particle size less than 0.088 mm: 2% -10%; dextrin: 1% -4%; water reducing agent: 1 to 3 percent. The problems are the same as the patent 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.
The high thermal shock resistant and wear resistant prefabricated part for the dry quenching coke tank is disclosed in Chinese patent publication No. CN110294623A, and is prepared from the following raw materials in parts by weight: 20-30 parts of silicon carbide whiskers; 40-60 parts of bauxite-based homogeneous material; 5-10 parts of silicon dioxide micro powder; 1-3 parts of water; 0.2-0.6 part of water reducing agent; alpha-Al2O315-20 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 bauxite based homogeneous material contains 88 wt% of alumina, is prepared by firing bauxite green bodies with the alumina content of 75 wt% at 1500-1600 ℃ for 4h, and has the bulk density of 2.92-3.43g cm after firing-3. The high thermal shock resistant and wear resistant prefabricated part for the coke dry quenching tank takes silicon carbide crystal whiskers, bauxite-based homogeneous material and silicon dioxide micropowder as base materials, and alpha-Al is sprayed on the surface of the base materials2O3And MoSi2The prepared product has the advantages of high temperature resistance, corrosion resistance, wear resistance, thermal shock resistance and excellent chilling and shock resistance. The problems of the prior art are that the prior art is poor in rapid cooling and rapid heating performance, easy to crack and not suitable for a thin-layer bottom gate.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the coke tank bottom gate lining plate with the prefabricated part, which can prolong the service life of the coke tank bottom gate lining plate from no more than 3 months to more than 4.5 months, does not cause cracking caused by expansion, can reduce the bottom surface external temperature of the bottom gate by at least 100 ℃ and reduce the cost by at least 30%.
The measures for realizing the aim are as follows:
the utility model provides a coke pot bottom gate welt with compound of high temperature ceramic spare, includes the bottom plate, its characterized in that: the part which is easy to be impacted on the lining plate of the bottom gate is connected with at least two high-temperature ceramic pieces 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.
It is characterized in that: the high-temperature ceramic part for compounding comprises the following raw materials in percentage by weight: sintered or electrofused mullite with the granularity of 5-1 mm: 30-40%; sillimanite with granularity of 3-1 mm: 5-15%; andalusite with a particle size of less than 0.01 mm: 5-10%; sintered or electrofused mullite powder with a particle size of less than 0.088 mm: 25-40%; silicon carbide with the granularity of 1-0.1 mm: 3-9%; cordierite powder with particle size less than 0.074 mm: 3-10%; magnesium sulfate: 0.1-1%; aluminum sulfate: 0.1-1%; 0.5-2% of calcium lignosulphonate.
Preferably: the high-temperature ceramic part is provided with a bolt hole; the bolt is sunk on the surface of the high-temperature ceramic piece by at least 5 mm.
It is characterized in that: mixing the raw materials of the high-temperature ceramic piece, pressurizing the mixture to form a compact blank, baking the compact blank at the temperature of 110-200 ℃ for not less than 24 hours,
sintering at 1350-1450 ℃, preserving heat for 4-12h, and slowly cooling for later use.
It is characterized in that: the castable is a high-alumina castable with alumina content not less than 60%; the performance indexes are as follows: the thermal shock resistance stability index is as follows: the water cooling circulation times at 1100 ℃ are not less than 30, and the normal-temperature compressive strength after 1100 ℃ firing is not less than 80 MPa.
It is characterized in that: the height of the positioning support does not exceed two thirds of the thickness of the high-temperature ceramic piece.
It is characterized in that: and organic coatings or paints are coated on the positioning bracket and the reinforcing piece.
It is characterized in that: the service temperature of the positioning bracket and the reinforcing piece is not lower than 1000 ℃.
A method for preparing a coke pot bottom gate lining plate compounded with a high-temperature ceramic part comprises the following steps:
1) weighing all solid raw materials of the high-temperature ceramic part according to a proportion and then uniformly mixing the solid raw materials with the liquid raw materials;
2) after mixing, pressurizing to form a compact blank, baking at 110-200 ℃ for not less than 24 hours, firing at 1350-1450 ℃, preserving heat for 4-12 hours, and slowly cooling for later use;
3) fastening the high-temperature ceramic piece with the bottom plate by using a bolt;
4) welding a positioning support on the bottom plate, connecting the reinforcing piece to the positioning support, and naturally drying for 1-2 days after pouring of a pouring material layer is completed;
5) before use, the mixture is baked at 100-200 ℃ for 5-12 h 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 electrofused mullite with the granularity of 5-1 mm: 30-40%; the high-temperature ceramic piece mainly plays the roles of aggregate and skeleton, and the wear resistance of the high-temperature ceramic piece is enhanced, but when the addition amount of the high-temperature ceramic piece is less than the limited 30%, the problems of less aggregate, more fine powder and large shrinkage after firing can be caused; when the addition amount is higher than the limited 40%, the problems of excessive aggregate, less fine powder and incompactness are caused, so the addition amount is limited to 30-40%; further, if the particle size is outside the defined range, quality fluctuation occurs and the pressed green compact is liable to crack.
Sillimanite with the granularity of 3-1 mm: 5-15%, wherein the high-temperature-resistant mullite-containing brick mainly plays a role of fine aggregate, volume shrinkage of a product after firing can be reduced through mullite during high-temperature firing, but when the addition amount of the mullite-containing brick is less than 5% of the limited amount, expansion generated is small, and the effect is not large; when the addition amount is more than the limited 15%, the expansion is too large, so that cracks are generated after the firing, and the addition amount is limited to 5-15%; and if the particle size is beyond the defined range, quality fluctuation can be generated, and the apparent dimensional stability of the product is influenced.
Andalusite with a particle size of less than 0.01 mm: 5-10%, wherein the composite material mainly acts as an expanding agent, and volume shrinkage of a product after sintering can be reduced through mullite in a high-temperature sintering process, but when the adding amount of the composite material is less than 5% of the limited amount, the expansion generated is small, and the effect is not large; when the addition amount is more than the limited 10%, the expansion is too large, so that cracks are generated after the firing, and the addition amount is limited to 5-10%; and if the particle size is beyond the defined range, quality fluctuation can be generated, and the apparent dimensional stability of the product is influenced.
Sintered or electrofused mullite powder with a particle size of less than 0.088 mm: 25-40%, wherein the high-temperature sintering material mainly plays a role of matrix fine powder, the structure is compact through high-temperature sintering, and when the addition amount of the high-temperature sintering material is less than the limited 25%, the fine powder is less, the aggregate cannot be wrapped, and the high-temperature sintering material is easy to crack; when the amount of the fine powder added is more than 40%, the amount of the fine powder is limited to 25 to 40% because the fine powder is too much and cracks may be generated due to shrinkage after firing.
Silicon carbide with a particle size of 1-0.1 mm: 3-9%, which mainly plays a role in enhancing the hardness and wear resistance of the matrix, and when the addition amount of the additive is less than the limited 3%, the content of the fine powder is small, and the enhancing effect is not obvious; when the amount of the additive is more than the limited 9%, 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 is easily caused.
Cordierite powder with particle size less than 0.074 mm: 3-10%, the heat shock resistance of the matrix is mainly improved, and when the addition amount of the heat shock resistance is less than the limited 3%, the content of fine powder is low, and the effect is not obvious; when the addition amount is more than the limited 10%, the carried substance contains impurities, so that the melting point is reduced, and the high-temperature performance is influenced, so that the addition amount is limited to 3-10%.
Magnesium sulfate: 0.1-1%, which mainly functions as a binder in the present invention, and when the amount of addition is less than the defined 0.1%, the effect is not significant; when the addition amount is more than the limited 1%, the carried-in substance contains impurities, S volatilizes and affects the environment, so the addition amount is limited to 0.1-1%.
Aluminum sulfate: 0.1-1%, which mainly functions as a binder in the present invention, and when the amount of addition is less than the defined 0.1%, the effect is not significant; when the addition amount is more than the limited 1%, the carried-in substance contains impurities, S volatilizes and affects the environment, so the addition amount is limited to 0.1-1%.
Calcium lignosulfonate: 0.5-2%, which mainly functions as a binder in the present invention, and when the amount of addition is less than the defined 0.5%, the effect is not significant; when the addition amount is more than the defined 3%, the carried substance contains organic volatile matters to affect the compactness of the green body, so the addition amount is limited to 0.5-2%.
The castable is a high-alumina castable with alumina content not less than 60%, and when the alumina content is more than the limited 60%, the service performance of the castable is influenced; and because the coke tank bottom gate has tens of times of cold-hot circulation operation every day, 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, and the normal-temperature compressive strength after 1100 ℃ firing is not less than 80 MPa.
Compared with the prior art, the coke tank bottom gate lining plate 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 coke tank bottom gate lining plate, prolongs the service life of the lining plate from 1-3 months to more than 4.5 months, can reduce the external surface temperature of the bottom of the coke tank bottom gate by at least 100 ℃, and reduces the cost by at least 30%.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: the high-temperature ceramic material comprises a base plate 1, a positioning support 2, a reinforcing piece 3, a pouring material 4, a pouring material layer 5, a bolt 6, a high-temperature ceramic piece 7 and a bolt hole 8.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
a coke pot bottom gate lining plate compounded with high-temperature ceramic pieces comprises a bottom plate 1, wherein at least two high-temperature ceramic pieces 7 are connected to the position, which is easy to be impacted, of the bottom gate lining plate through bolts 6, and the rest part is at least two casting material layers 5; the pouring material 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 pouring materials 4; the high-temperature ceramic piece 7 is provided with a bolt hole 8.
The bolt 6 sinks to the surface of the high-temperature ceramic piece 7 by at least 5mm, preferably 7 mm; organic coating or paint is coated on the reinforcing piece 3; the use temperature of the reinforcing part 3 and the positioning bracket 2 is not lower than 1000 ℃; the height of the positioning support 2 is not more than two thirds of the thickness of the high-temperature ceramic piece.
Installing a high-temperature ceramic part in place by the coke tank bottom gate lining plate, pouring a casting material layer, and naturally drying for 1-2 days; before use, the mixture is baked for 5 to 12 hours at any temperature of 100 to 200 ℃ and then put into use.
Table 1 is a value list of the raw material composition of each embodiment of the high-temperature ceramic part of the present invention;
table 2 is a table of the main process parameters of each embodiment of the high temperature ceramic article of the present invention;
table 3 is a table of performance test conditions of various embodiments of the high-temperature ceramic part of the invention.
The embodiments of the invention produce the liner plate according to the following steps:
1) weighing all solid raw materials of the high-temperature ceramic part according to a proportion and then uniformly mixing the solid raw materials with the liquid raw materials;
2) after mixing, pressurizing to form a compact blank, baking at 110-200 ℃ for not less than 24 hours, firing at 1350-1450 ℃, preserving heat for 4-12 hours, and slowly cooling for later use;
3) fastening the high-temperature ceramic piece with the bottom plate by using a bolt;
4) welding a positioning support on the bottom plate, connecting the reinforcing piece to the positioning support, and naturally drying for 1-2 days after pouring of a pouring material layer is completed;
5) before use, the mixture is baked at 100-200 ℃ for 5-12 h and then put into use.
TABLE 1 list of the composition of the raw materials (in% by weight) for the examples of the high-temperature ceramic parts according to the invention
TABLE 2 List of the main process parameters of various embodiments of the high temperature ceramic article of the present invention
TABLE 3 List of the results of testing the properties of various embodiments of the high temperature ceramic parts of the present invention
Using one of the above-mentioned high-temperature ceramic parts, as in the case of the above-mentioned example: after trial for 4 months, the cracking or falling-off phenomenon is not found and the product can be used continuously; through tests, the bottom surface temperature of the bottom gate of the coke tank is reduced by 120 ℃ compared with the prior art. As the operation lasts for 1 month more than the original operation, the operation cost is reduced by about 34 percent through preliminary statistics.
The present embodiments are merely preferred examples, and are not intended to limit the scope of the present invention.
Claims (8)
1. The utility model provides a coke pot bottom gate welt with compound of high temperature ceramic spare, includes the bottom plate, its characterized in that: the part which is easy to be impacted on the lining plate of the bottom gate is connected with at least two high-temperature ceramic pieces 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.
2. The coke oven bottom gate liner composited with high-temperature ceramic parts as claimed in claim 1, wherein: the high-temperature ceramic part comprises the following raw materials in percentage by weight: sintered or electrofused mullite with the granularity of 5-1 mm: 30-40%; sillimanite with granularity of 3-1 mm: 5-15%; andalusite with a particle size of less than 0.01 mm: 5-10%; sintered or electrofused mullite powder with a particle size of less than 0.088 mm: 25-40%; silicon carbide with the granularity of 1-0.1 mm: 3-9%; cordierite powder with particle size less than 0.074 mm: 3-10%; magnesium sulfate: 0.1-1%; aluminum sulfate: 0.1-1%; 0.5-2% of calcium lignosulphonate.
3. The coke oven bottom gate liner composited with high-temperature ceramic parts as claimed in claim 1, wherein: the high-temperature ceramic part is provided with a bolt hole; the bolt is sunk on the surface of the high-temperature ceramic piece by at least 5 mm.
4. The coke oven bottom gate liner composited with high-temperature ceramic parts as claimed in claim 1, wherein: the castable is a high-alumina castable with alumina content not less than 60%; the performance indexes are as follows: the thermal shock resistance stability index is as follows: the water cooling circulation times at 1100 ℃ are not less than 30, and the normal-temperature compressive strength after 1100 ℃ firing is not less than 80 MPa.
5. The coke oven bottom gate liner composited with high-temperature ceramic parts as claimed in claim 1, wherein: the height of the positioning support does not exceed two thirds of the thickness of the high-temperature ceramic piece.
6. The coke oven bottom gate liner composited with high-temperature ceramic parts as claimed in claim 1, wherein: the service temperature of the positioning bracket and the reinforcing piece is not lower than 1000 ℃.
7. The coke oven bottom gate liner composited with high-temperature ceramic parts as claimed in claim 1, wherein: and organic coatings or paints are coated on the positioning bracket and the reinforcing piece.
8. The method for preparing the coke pot bottom gate lining plate compounded with the high-temperature ceramic part as claimed in claim 1 comprises the following steps: the method comprises the following steps:
1) weighing all solid raw materials of the high-temperature ceramic part according to a proportion and then uniformly mixing the solid raw materials with the liquid raw materials;
2) after mixing, pressurizing to form a compact blank, baking at 110-200 ℃ for not less than 24 hours, firing at 1350-1450 ℃, preserving heat for 4-12 hours, and slowly cooling for later use;
3) fastening the high-temperature ceramic piece with the bottom plate by using a bolt;
4) welding a positioning support on the bottom plate, connecting the reinforcing piece to the positioning support, and naturally drying for 1-2 days after pouring of a pouring material layer is completed;
5) before use, the mixture is baked at the temperature of 110-200 ℃ for 5-12 h and then put into use.
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