CN114806609A - High-temperature ceramic coke tank bottom gate lining plate and high-temperature ceramic block preparation method - Google Patents

Abstract

A high-temperature ceramic coke pot bottom gate lining plate comprises a bottom plate, wherein all high-temperature ceramic blocks are connected to the bottom plate and fixed to the bottom plate through countersunk bolts; the bottom of the high-temperature ceramic block is provided with an anti-skidding groove, and the high-temperature ceramic block is provided with a fixing bolt hole; the bottom plate is provided with an anti-skid lug which is matched with an anti-skid groove arranged at the bottom of the high-temperature ceramic block; an expansion joint is arranged between the high-temperature ceramic blocks, and refractory joint materials are filled in the expansion joint. The preparation method of the high-temperature ceramic block comprises the following steps: mixing the solid raw material with water; die filling and pressurizing to form a compact blank body, and then baking; sintering; naturally cooling and reserving for use; and (3) mounting the prepared high-temperature ceramic block. The invention has good performance of resisting rapid cooling and rapid heating, is not easy to crack, solves the problems of rapid heat transfer, low strength and the like of the lining plate of the coke tank bottom gate, prolongs the service life of the lining plate from 1-3 months to more than 6 months, reduces 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

High-temperature ceramic coke tank bottom gate lining plate and high-temperature ceramic block preparation method

Technical Field

The invention relates to the technical field of coke dry quenching in coking industry, and mainly relates to a high-temperature ceramic coke tank bottom gate lining plate and a high-temperature ceramic 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 lining plate material taper section 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 heat of 1100 ℃ 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 fast-assembling wear-resistant composite coke pot 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 resistance to rapid cooling and rapid heating 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% -38%; calcined quartz with a particle size in the range of 1mm to 3 mm: 6 to 10 percent; forsterite with a particle size of less than or equal to 1 mm: 11 to 21 percent; magnesium aluminate spinel with 180 mesh particle size: 9 to 19 percent; ethyl silicate: 2% -7%; hydrated alumina with particle size less than 0.088 mm: 2% -10%; dextrin: 1% -4%; water reducing agent: 1 to 3 percent. The problem is the same as that of the publication No. CN110668832A, namely the casting material 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 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-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 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 materials ₂ O ₃ And MoSi ₂ The 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 high-temperature ceramic coke tank bottom gate lining plate which can prolong the service life of the coke tank bottom gate lining plate from no more than 3 months to more than 6 months, does not cause cracking caused by expansion, can reduce the bottom surface temperature of the bottom gate by at least 100 ℃ and reduces the cost by at least 30%.

The measures for realizing the aim are as follows:

the utility model provides a burnt jar bottom brake door welt of high temperature ceramic, includes the bottom plate, its characterized in that: the bottom plate is connected with high-temperature ceramic blocks, and the high-temperature ceramic blocks are fixed with the bottom plate through countersunk bolts; the bottom of the high-temperature ceramic block is provided with an anti-slip groove, and the high-temperature ceramic block is provided with a fixing bolt hole; the bottom plate is provided with an anti-skid lug which is matched with an anti-skid groove arranged at the bottom of the high-temperature ceramic block; an expansion joint of 1-3mm is arranged between the high-temperature ceramic block and the high-temperature ceramic block, and a refractory joint material is filled in the expansion joint.

It is characterized in that: and the countersunk head bolt on the high-temperature ceramic block sinks on the surface of the high-temperature ceramic piece by at least 5 mm.

Further: and grooves or lugs which are matched with each other are arranged between the high-temperature ceramic blocks.

It is characterized in that: the anti-skid bumps arranged on the bottom plate are made of metal with the use temperature not lower than 1000 ℃.

It is characterized in that: the high-temperature ceramic block comprises the following raw materials in percentage by weight: flint clay with granularity of 5-3 mm: 30 to 40 percent; cordierite with the particle size of 3-1 mm: 8-18%; cordierite powder with the particle size of 1-0.1 mm: 5-10%; kyanite with a particle size of less than 0.01 mm: 3-8%; sintered mullite powder with a particle size of less than 0.088 mm: 35-45%; silicon carbide with the granularity of 1-0.1 mm: 4-8%; ferrosilicon alloy powder less than 0.088 mm: 0.5-3%; bonding clay: 1-3%; 0.5 to 2 percent of calcium lignosulphonate; adding no more than 3% of water.

It is characterized in that: the content of alumina in the flint clay with the granularity of 5-3 mm is 42-55% by mass.

It is characterized in that: the content of silicon carbide in the silicon carbide with the granularity of 1-0.1 mm is not less than 95%.

It is characterized in that: the silicon-iron alloy powder with the diameter less than 0.088mm contains metal silicon not less than 70 percent.

A preparation method of a high-temperature ceramic block of a lining plate of a bottom gate of a high-temperature ceramic coke pot comprises the following steps:

1) weighing all solid raw materials of the high-temperature ceramic according to a proportion, and uniformly mixing the weighed solid raw materials with water not higher than 3%;

2) after die filling, pressurizing to form a compact blank, and then baking for not less than 24 hours at 110-200 ℃;

3) sintering at 1360-1420 ℃ for 6-12 h;

4) naturally cooling to room temperature for later use;

5) mounting the prepared high-temperature ceramic block: welding the anti-skid lugs on the bottom plate; embedding and positioning the anti-slip grooves on the prepared high-temperature ceramic blocks and the anti-slip bumps on the bottom plate, and fixing the anti-slip grooves and the anti-slip bumps on the bottom plate through countersunk bolts; an expansion joint of 1-3mm is reserved between every two adjacent high-temperature ceramic blocks, and a refractory joint material is filled in the expansion joint.

The action and mechanism of each raw material and main process in the invention

The raw materials of the high-temperature ceramic comprise:

flint clay with granularity of 5-3 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 aggregates, less fine powder and incompact combination 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.

Cordierite with the particle size of 3-1 mm: 8-18%; the invention mainly plays a role of increasing the aggregate with good thermal damage resistance, but when the adding amount of the aggregate is less than the limited 8 percent, the amount of the aggregate is small, and the effect is not large; when the addition amount is more than the limited 18%, the hardness of cordierite is insufficient, so that the wear resistance is not good, and the addition amount is limited to 8-18%; 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.

Cordierite powder with the particle size of 1-0.1 mm: 5-10%; it mainly plays a role in increasing the thermal destruction resistance in the present invention, but when the amount added is less than the defined 5%, the amount is small and the effect is not large; when the addition amount is more than the limited 10%, more impurities are brought in to influence the high-temperature performance, so that 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.

Kyanite with a particle size of less than 0.01 mm: 3-8%; the composite material mainly plays a role of an expanding agent, counteracts the shrinkage of matrix sintering through volume expansion in a high-temperature sintering process, keeps the dimensional stability of a product, and has limited expansion amount and small effect when the addition amount of the composite material is less than 3 percent of the limited amount; when the addition amount is higher than the limited 8%, the excessive expansion is not beneficial to controlling the product size, so the addition amount is limited to 3-8%.

Sintered mullite powder with a particle size of less than 0.088 mm: 35-45%; the invention mainly plays a role of matrix fine powder, when the addition amount of the matrix fine powder is less than the limited 35%, the amount of the fine powder is small, the aggregate is difficult to wrap, and green bodies are easy to crack; when the amount of the additive is more than 45%, the sintering shrinkage is small, and the size is not easily controlled, so that the amount of the additive is limited to 35 to 45%. And if the particle size is outside the defined range, oxidation of the silicon carbide during use is easily caused.

Silicon carbide with the granularity of 1-0.1 mm: 4-8%; the invention mainly plays a role in improving the hardness and enhancing the wear resistance of the matrix, and when the addition amount of the composite material is less than the limited 4 percent, the composite material is small in amount and has no obvious effect; when the addition amount is more than the limited 8%, the sintering is not easy to affect the high-temperature performance of the substrate, so the addition amount is limited to 4-8%.

Ferrosilicon alloy powder less than 0.088 mm: 0.5-3%; it mainly acts as an antioxidant and promotes sintering in the present invention, and when the amount added is less than the defined 0.5%, the effect is not significant; when the addition amount is more than the limited 3.5%, the carried substance contains impurity iron, which affects the high temperature performance, so the addition amount is limited to 0.5-3%.

Bonding clay: 1-3%; it mainly acts as a binder in the present invention, and when the amount added is less than the defined 1%, the effect is not significant; when the amount of the additive is more than the limited 3%, the shrinkage and water absorption are easy, and the green strength is influenced, so that the amount of the additive is limited to 1 to 3%.

Calcium lignosulfonate: 0.5-2%; it mainly acts as an auxiliary binder in the present invention, and when the amount added is less than the defined 0.5%, the effect is not significant; when the addition amount is more than the defined 2%, 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%.

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 6 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;

FIG. 2 is a schematic structural view of the high temperature ceramic block of FIG. 1;

in the figure: the anti-skid device comprises a base plate 1, a high-temperature ceramic block 2, a countersunk head bolt 3, an anti-skid groove 4, a fixing bolt hole 5, an anti-skid lug 6, an expansion joint 7, a connecting hole 8, a refractory joint material 9, a groove 10 and a lug 11.

Detailed Description

The invention is described in detail below with reference to the attached drawing figures:

the utility model provides a high temperature pottery coke drum bottom gate welt, includes bottom plate 1, its lies in: the bottom plate 1 is connected with high-temperature ceramic blocks 2, and the high-temperature ceramic blocks 2 are fixed with the bottom plate 1 through countersunk bolts 3; an anti-slip groove 4 is processed at the bottom of the high-temperature ceramic block 2, and a fixing bolt hole 5 is arranged on the high-temperature ceramic block 2; an anti-skid lug 6 matched with an anti-skid groove 4 arranged at the bottom of the high-temperature ceramic block 2 is welded on the bottom plate 1; an expansion joint 7 with the thickness of 1-3mm is arranged between the high-temperature ceramic block 2 and the high-temperature ceramic block 2, and a refractory joint material 9 is filled in the expansion joint 7; a connecting hole 8 is processed on the bottom plate 1;

the countersunk head bolt 3 on the high-temperature ceramic block 2 sinks on the surface of the high-temperature ceramic block 2 and is taken within 5-8 mm.

And a groove 10 or a lug 11 which is matched with each other is arranged between the high-temperature ceramic block 2 and the high-temperature ceramic block 2.

The shapes of the anti-slip grooves 4 formed in the bottom of the high-temperature ceramic block and the anti-slip projections 6 on the bottom plate 1 are not limited to those shown in the drawings, and may be various shapes.

The anti-skid lugs 6 arranged on the bottom plate are made of alloy with the use temperature not lower than 1000 ℃.

Table 1 is a value list of the raw material composition of each example of the high temperature ceramic of the present invention;

table 2 is a table of the main process parameters for the preparation of the high temperature ceramic blocks of the embodiments of the present invention;

table 3 is a table of the performance test of the high temperature ceramic blocks according to the embodiments of the present invention.

The preparation method of the high-temperature ceramic block 2 comprises the following steps:

1) weighing all solid raw materials of the high-temperature ceramic according to a proportion, and uniformly mixing the weighed solid raw materials with water not higher than 3%;

2) after die filling, pressurizing to form a compact blank, and then baking for not less than 24 hours at 110-200 ℃;

3) sintering at 1360-1420 deg.C for 6-12 h;

4) naturally cooling to room temperature for later use;

5) mounting the prepared high-temperature ceramic block 2: welding the anti-skid lugs 6 on the bottom plate 1; embedding and positioning the anti-slip grooves 4 on the prepared high-temperature ceramic blocks 2 and the anti-slip bumps 6 on the bottom plate 1, and fixing the anti-slip grooves and the anti-slip bumps with the bottom plate 1 through countersunk bolts 3; an expansion joint 7 with the thickness of 1-3mm is reserved between every two adjacent high-temperature ceramic blocks 2, and a refractory joint material 9 is filled in the expansion joint 7.

TABLE 1 tabulated (wt%) raw material compositions for various examples of the high temperature ceramics of the present invention

TABLE 2 List of the main process parameters of various examples of the high-temperature ceramics of the present invention

TABLE 3 tabulation of the results of testing the properties of the high temperature ceramics according to the examples of the present invention

One of the above high temperature ceramic back door liners was used as in the previous example: after trial for 5 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 180 ℃ compared with the prior art. The running cost is reduced by about 39% by statistics because the running time is more than 2 months.

The present embodiments are merely preferred examples, and are not intended to limit the scope of the present invention.

Claims (9)

1. The utility model provides a high temperature pottery coke drum bottom gate welt, includes the bottom plate, its characterized in that: the bottom plate is connected with high-temperature ceramic blocks, and the high-temperature ceramic blocks are fixed with the bottom plate through countersunk bolts; the bottom of the high-temperature ceramic block is provided with an anti-slip groove, and the high-temperature ceramic block is provided with a fixing bolt hole; the bottom plate is provided with an anti-skid lug which is matched with an anti-skid groove arranged at the bottom of the high-temperature ceramic block; an expansion joint of 1-3mm is arranged between the high-temperature ceramic block and the high-temperature ceramic block, and a refractory joint material is filled in the expansion joint.

2. The high temperature ceramic coke oven bottom gate liner plate as claimed in claim 1, wherein: and the countersunk head bolt on the high-temperature ceramic block sinks on the surface of the high-temperature ceramic piece by at least 5 mm.

3. The high temperature ceramic coke oven bottom gate liner plate as claimed in claim 1, wherein: and grooves or lugs which are matched with each other are arranged between the high-temperature ceramic blocks.

4. The high temperature ceramic coke pot bottom gate liner plate of claim 1, wherein: the anti-skid bumps arranged on the bottom plate are made of metal with the use temperature not lower than 1000 ℃.

5. The high temperature ceramic coke pot bottom gate liner plate of claim 1, wherein: the high-temperature ceramic block comprises the following raw materials in percentage by weight: flint clay with the granularity of 5-3 mm: 30-40%; cordierite with the particle size of 3-1 mm: 8-18%; cordierite powder with the particle size of 1-0.1 mm: 5-10%; kyanite with a particle size of less than 0.01 mm: 3-8%; sintered mullite powder with a particle size of less than 0.088 mm: 35-45%; silicon carbide with the granularity of 1-0.1 mm: 4-8%; ferrosilicon alloy powder less than 0.088 mm: 0.5-3%; bonding clay: 1-3%; 0.5-2% of calcium lignosulphonate; adding no more than 3% of water.

6. The high temperature ceramic coke pot bottom gate liner plate of claim 5, wherein: the content of alumina in the flint clay with the granularity of 5-3 mm is 42-55% by mass.

7. The high temperature ceramic for the high temperature ceramic coke oven bottom gate liner plate as claimed in claim 5, wherein: the content of silicon carbide in the silicon carbide with the granularity of 1-0.1 mm is not less than 95%.

8. The high temperature ceramic coke pot bottom gate liner plate high temperature ceramic of claim 5, wherein: the silicon-iron alloy powder with the diameter less than 0.088mm contains metal silicon not less than 70 percent.

9. The method for preparing the high-temperature ceramic block of the lining plate of the bottom gate of the high-temperature ceramic coke pot as claimed in claim 1, which comprises the following steps:

1) weighing all solid raw materials of the high-temperature ceramic according to a proportion, and uniformly mixing the weighed solid raw materials with water not higher than 3%;

2) after die filling, pressurizing to form a compact blank, and then baking for not less than 24 hours at 110-200 ℃;

3) sintering at 1360-1420 ℃ for 6-12 h;

4) naturally cooling to room temperature for later use;

5) mounting the prepared high-temperature ceramic block: welding the anti-skid lugs on the bottom plate; embedding and positioning the anti-slip grooves on the prepared high-temperature ceramic blocks and the anti-slip bumps on the bottom plate, and fixing the anti-slip grooves and the anti-slip bumps on the bottom plate through countersunk bolts; an expansion joint of 1-3mm is reserved between every two adjacent high-temperature ceramic blocks, and a refractory joint material is filled in the expansion joint.

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