A dry quenching coke pot that is not easily detached and its preparation method

Abstract

A type of dry-quenched coke canister that is not easily detached mainly consists of a coke canister shell, a straight cylindrical section liner and a conical section liner inside the coke canister shell, liner plate one, screw holes, bolts, gap one, grout, liner plate two, gap two, and grooves. Liner plate one and liner plate two are both made of ceramic. The width of gap one is not less than 10mm, and the width of gap two is not more than 5mm. The grout is made of refractory ramming material. A shoulder is provided in the screw hole. The diameter of the screw hole above the upper end face of the shoulder is at least 2mm larger than the bolt diameter, and the diameter of the remaining screw hole is the same as the bolt diameter. A fixing plate is provided on the coke canister shell below the corner of the four adjacent liner plates two, and the fixing plate is coated with an anti-oxidation coating. Preparation method: connect the ceramic liner plate to the coke canister shell; attach the fixing plate coated with anti-oxidation coating to the steel shell after drying; lay ceramic liner plates one and two; fill gap one and two with refractory ramming material; and dry. The lifespan of this invention is extended from 3-6 months to more than 7 months.

Description

Technical Field

[0001] This invention relates to the field of equipment for coking production, specifically to a dry quenching coke pot and its preparation method. Background Technology

[0002] The rotating coke oven mainly consists of the oven body, lining plates, lifting rods, transmission rods, annular octagonal beams, guide wheel assemblies, bottom gate, buffer seat, refractory materials, and lubrication pipelines. As the component in direct contact with the red-hot coke, the coke oven lining plate requires materials with strong heat resistance and wear resistance, high strength and toughness under hot conditions, and the ability to withstand alternating hot and cold temperatures. The lining plates for the conical section and bottom gate are made of heat-resistant cast steel ZG35Cr24Ni7SiN and heat-resistant stainless steel 20X23H18, which have good wear resistance and heat resistance, and can withstand short-term temperatures up to 1100℃. Some companies use heat-resistant stainless steel for some of the coke oven lining plates, and the connecting bolts in contact with the red-hot coke use a large-head structure made of stainless steel, making the connection between the lining plate and the coke oven frame more robust and reliable; this improves the lining plate's lifespan and prevents premature damage.

[0003] Because dry quenching coke pots and pot covers have a short service life, problems such as liner detachment and burning occur during use, causing various equipment issues and affecting normal dry quenching production. Some dry quenching rotary coke pot liners use 2520 cast steel blocks, which need to be completely replaced on average every 0.5 to 1 year.

[0004] Currently used alloy liners or heat-resistant cast steel parts are fixed to the support plate with anchoring nails. During use, prolonged exposure to the impact, abrasion, and rapid heating and cooling of coke can cause the liner to burn, deform, warp, or detach. Lightweight castables are not wear-resistant and cannot meet the application requirements of bottom gates. If the bottom gate is damaged, coke can directly impact the bottom gate support plate, easily causing hot coke to escape, burn the electrical wiring of the coke tanker, and even cause fires.

[0005] Search results:

[0006] Chinese Patent Publication No. CN212316016U describes a quick-installation, wear-resistant composite coke can liner and a dry quenching coke can. The liner consists of a support plate and a wear-resistant composite layer. The support plate is located outside the wear-resistant composite layer, and its outer side is equipped with a liner fixing mechanism to secure the liner to the dry quenching coke can. The can body is equipped with straight ribs and reinforcing rings, which are arranged circumferentially around the can body. The straight ribs and reinforcing rings intersect to form multiple frames. The liner fixing mechanism includes a locking device, a locking hook frame, a movable locking hook, and a lower locking plate. The liner is installed on the corresponding frame, and the locking hook frame and movable locking hook are interlocked. The lower locking plate extends downward from the liner and is limited and supported on the reinforcing ring. Its advantages include high temperature resistance, wear resistance, and low thermal conductivity, making it less prone to burn-out. However, the problem lies in the fact that the thickness of the coke can bottom gate is only 20mm in some areas and 60-80mm in others. If straight ribs and reinforcing rings are installed, they cannot provide adequate protection, making the gate susceptible to burn-out.

[0007] Chinese Patent Publication No. CN111978077A describes a cordierite-containing composite refractory material for the working lining of dry-quenched coke ovens and silos. The raw materials are added in the following weight proportions: 20-45 parts of 1-3 mm fused mullite, 10-45 parts of 3-5 mm fused mullite, 10-20 parts of 0-1 mm cordierite, 15-40 parts of 1-3 mm cordierite, 5-20 parts of 200-mesh corundum powder, 3-8 parts of silicon nitride powder, 4-15 parts of calcium aluminate cement, and 2-6 parts of silica fume. The composition consists of 1-7 parts alumina micro powder, 0.5-2 parts asbestos fiber, and 0.1-10% of the total weight of the raw material. Although this literature has good coating performance and can be used in locations with difficult construction, narrow spaces, and irregular working surfaces, solving the problem of low overall service life of coke tanks caused by severe deformation, cracks, and wear of heat-resistant steel lining plates, thus improving the service life and operating rate of the tank and saving energy and reducing consumption, its problem lies in the low strength of the coating material, poor resistance to rapid cooling and heating, and easy peeling and damage.

[0008] Chinese patent application CN202010270638.2 describes an energy-saving coke oven overheating casting method. This method involves increasing the casting space for the refractory lining at the bottom gate of the coke oven; welding butterfly-shaped anchoring nails to the inner wall of the coke oven; attaching low-thermal-conductivity polymer-bonded nano-insulation boards to the inner surface of the coke oven; and then painting it twice with asphalt paint. Formwork is then erected, with the bottom gate and lower cone section cast first. After casting and curing, the inclined cone section is then cast, followed by the straight section. After completion, natural curing and baking are performed. While this method addresses the shortcomings of traditional coke oven shell construction... High temperatures can cause the frame to crack and deform. The inner lining plates are prone to oxidation, cracking, deformation, wear and detachment due to high temperatures, and require frequent replacement. However, the castable has a high moisture content, limited space on the bottom gate, and is relatively thin. The castable itself has poor resistance to rapid heating and cooling. The expansion coefficient of the butterfly-shaped anchors is different from that of the castable. The bottom gate is used 30-70 times a day, and its lifespan is generally 3-6 months or even longer. Abnormal expansion of the anchors causes cracking and peeling of the castable, especially in the bottom gate area, where the damage is very serious.

[0009] The journal *Refractory Materials* [2017, 51(1): 63-64] introduced the application of lightweight refractory castables in the lining of coke cans for dry quenching coke ovens. To reduce the material procurement and maintenance costs of coke can linings, improve the insulation performance and heat recovery rate of coke cans, and reduce equipment failures in dry quenching coke ovens, this study explored the effects of using lightweight refractory castables to replace alloy liners as coke can linings. The reasons for selecting high-strength mullite lightweight castables and high-strength lightweight castables as lining materials for the lower conical and straight sections of the coke cans, respectively, were analyzed. Practice has proven that lightweight refractory castables provide good insulation, reducing the surface temperature of the outer wall of the can from 500℃ to 150℃. This significantly reduces the heat loss from red-hot coke and the damage to the can body and surrounding components caused by high temperatures. It also solves the problem of lining plates falling into the dry quenching coke oven and blocking the rotary sealing valve, eliminating safety hazards and resulting in significant economic benefits. However, the problem lies in the low strength and poor wear resistance of lightweight castables. They are not resistant to rapid heating and cooling and are prone to peeling and breakage.

[0010] Chinese Patent Publication No. CN110668832A describes a wear-resistant castable for coke ovens with the following composition: ≤5mm bauxite: 30-68 parts; ≤3mm alumina hollow spheres: 10-45 parts; alumina micro powder: 1-5 parts; silica micro powder: 5-12 parts; pure calcium aluminate cement: 3-10 parts; dispersant: 0.1-1 parts; explosion retardant: 0.1-1 parts; tartaric acid: 0.02-0.03 parts. While this wear-resistant castable for coke ovens possesses good compressive strength, flexural strength, and wear resistance, the problem lies in the poor rapid cooling and heating performance of the bauxite-containing castable, making it prone to cracking and unsuitable for thin-layer bottom gates.

[0011] Chinese Patent Publication No. CN109704792A describes a castable refractory for a coke oven lining, comprising, by weight percentage: 10%–22% high-alumina bauxite with a particle size between 5 mm and 8 mm; 20%–38% calcium hexaaluminate with a particle size between 3 mm and 5 mm; 6%–10% calcined quartz with a particle size between 1 mm and 3 mm; 11%–21% magnesium olivine with a particle size less than or equal to 1 mm; 9%–19% magnesium aluminum spinel with a particle size of 180 mesh; 2%–7% ethyl silicate; 2%–10% hydrated alumina with a particle size less than 0.088 mm; 1%–4% dextrin; and 1%–3% water-reducing agent. This invention also discloses a method for manufacturing a coke oven lining. The problem is the same as that of patent CN110668832A: the castable refractory containing alumina has poor rapid cooling and heating performance, is prone to cracking, and is not suitable for use in thin-layer bottom gates.

[0012] Chinese Patent Publication No. CN110294623A describes a high thermal shock resistant and wear-resistant prefabricated component for dry-quenched coke cans, prepared from the following raw materials in parts by weight: 20-30 parts silicon carbide whiskers; 40-60 parts bauxite-based homogeneous material; 5-10 parts silica micropowder; 1-3 parts water; 0.2-0.6 parts water-reducing agent; 15-20 parts α-Al₂O₃ powder; and 8-12 parts MoSi₂ powder. The silicon carbide whiskers have a diameter of 0.1-2 μm and a length of 20-300 μm, and are in powder form. The bauxite-based homogeneous material contains 88 wt% alumina. The component is fired at 1500-1600℃ for 4 hours using bauxite green with 75 wt% alumina content, resulting in a bulk density of 2.92-3.43 g·cm³. -3 The high thermal shock resistant and wear-resistant prefabricated parts for dry-quenched coke cans use silicon carbide whiskers, bauxite-based homogeneous materials, and silica micro-powder as base materials, and are coated with α-Al2O3 and MoSi2 powders on the surface. The resulting products are resistant to high temperatures, corrosion, wear, and thermal shock, and have excellent resistance to rapid cooling and heating. The problem is similar to that of Chinese patents CN110668832A and CN109704792A.

[0013] Based on the above search results: domestic literature reports that coke pot liners for dry quenching are mainly heat-resistant cast iron parts or alloy liners, with some reports including refractory casting and precast liners; from a few field application results, it was found that: the design of castable materials neglected the difference in expansion coefficients between anchors or steel structures and refractory materials, which can easily cause abnormal expansion and cracking; precast liners are prone to falling off and collapsing. Summary of the Invention

[0014] The present invention aims to overcome the shortcomings of the existing technology and provide a dry quenching coke can that is not easily damaged, does not easily fall off, and is not easily burned by using ceramic liners and optimizing the structure of the dry quenching coke can. This extends the service life of the liner from 3-6 months to more than 7 months, reduces the surface temperature of the coke can by 300-400℃, and reduces the cost by 30-50% compared to the present invention. The invention also provides a method for preparing the dry quenching coke can that is not easily detached.

[0015] Measures to achieve the above objectives:

[0016] A type of dry-quenched coke can that is not easily detached mainly consists of a coke can shell, a straight cylindrical section liner and a conical section liner inside the coke can shell, a first liner plate of the straight cylindrical section liner, screw holes on the first liner plate, bolts in the screw holes, a first gap between every two adjacent first liner plates, grout in the first gap, a second liner plate of the conical section liner, a second gap between every two adjacent second liner plates, grout in the second gap, screw holes on the first and second liner plates, bolts in the screw holes, and slots. The key feature is that the first and second liner plates... All materials are ceramic; the width of gap one is not less than 10mm, the width of gap two is not more than 5mm, and the grout is made of refractory ramming material; a shoulder is provided in the screw holes of liner one and liner two, the diameter of the screw hole above the upper end face of the shoulder is at least 2mm larger than the bolt diameter, and the diameter of the remaining screw hole is the same as the bolt diameter; a fixing plate is provided on the coke shell below the corner of the four adjacent liner two plates in the conical section, the fixing plate forms a fixing plate ring, and an anti-oxidation coating is applied to the fixing plate.

[0017] Furthermore: the height of the screw holes above the upper end face of the shoulder accounts for 30-50% of the thickness of the ceramic liner.

[0018] Furthermore: the ceramic liner plates one and two have the following physical properties: a fire resistance temperature of not less than 1100℃, a water cooling cycle of not less than 100 times at 1100℃, and a compressive strength of not less than 80MPa.

[0019] Furthermore, the raw material composition and weight percentage content of the refractory ramming material used in the grout are as follows: mullite: 55-75%; aluminum powder: 1-7%; iron oxide powder: 5-15%; silicon carbide powder: 3-15%; sodium tetraborate powder: 0.5-5%; aluminum dihydrogen phosphate solution: 2.5-15%; wherein the weight percentage of mullite particles with a size of 3-1mm is not less than 45%.

[0020] Further: The coating for the anti-oxidation coating has the following composition and weight percentage content: sodium silicate: 15-45%; sodium borate: 3-12%; sodium bentonite: 1-5%; silicon carbide powder: 45-75%; and water is added at 8-20% of the total weight percentage of the above raw materials.

[0021] Furthermore: A grout containing aluminum dihydrogen phosphate solution is applied to the refractory ramming compound grout of ceramic lining plate one or ceramic lining plate two.

[0022] The raw material composition and weight percentage content of the grout containing aluminum dihydrogen phosphate solution are as follows: refractory ramming mix: 90-95%, aluminum dihydrogen phosphate solution: 5-10%; the refractory ramming mix is ​​a refractory ramming mix grout.

[0023] A method for preparing a dry quenching coke pot that is not easily detached, comprising the following steps:

[0024] 1) Connect the ceramic liner to the coke oven shell using bolts in the screw holes and slots;

[0025] 2) After drying, the fixing plate coated with anti-oxidation paint is welded to the steel shell located between the ceramic lining plates;

[0026] 3) Lay ceramic liner plate one and ceramic liner plate two separately, and fix them to the coke tank shell with bolts. Secure them to the adjacent ceramic liner plates through the slots provided on them. Fix one corner of each of every four adjacent ceramic liner plates one or ceramic liner plate two to the fixing plate coated with anti-oxidation paint. When laying, ensure that the width of the gap between each two adjacent ceramic liner plates one or ceramic liner plate two is limited, that is, the width of gap one is not less than 10mm and the width of gap two is not more than 5mm.

[0027] 4) Fill and ram the gaps in gap one and gap two with refractory ramming material and ram them to solidify them;

[0028] 5) Dry the product. After natural drying for 1 to 2 days, bake it at a temperature not exceeding 300℃ for at least 12 hours before putting it into use.

[0029] The role and mechanism of each raw material and main process in this invention

[0030] The reason why both liner plate one and liner plate two are made of ceramic is that ceramic has high hardness and strength after being fired at high temperature, and can withstand the thermal shock and wear of coke, so as to extend the service life of the coke can.

[0031] The reason why the width of gap one is controlled to be no less than 10mm and the width of gap two is no more than 5mm is that the straight section where gap one is located experiences a relatively large rate of rapid cooling and heating, causing the ceramic and grouting materials to expand to a certain extent. In addition, carbon powder is deposited during use. Therefore, maintaining a gap width of no less than 10mm is beneficial for absorbing the expansion of the grout and ceramic. On the other hand, the cone section where gap two is located has a relatively smaller rate of rapid cooling and heating, and safety factors are involved. Therefore, considering the expansion of the ceramic and grouting materials, maintaining a gap width of no more than 5mm is beneficial for absorbing the expansion of the grout and ceramic while ensuring the safety and seamlessness of the coke tank.

[0032] The reason why the present invention provides a shoulder in the lower part of the screw holes of the first and second liner plates is that the diameter of the screw hole above the upper end face of the shoulder is at least 2 mm larger than the bolt diameter, and the remaining screw hole diameter is the same as the bolt diameter. This is to facilitate the fixing of the bolt and prevent it from falling out of the screw hole. In addition, since the diameter of the screw hole above the upper end face of the shoulder is at least 2 mm larger than the bolt diameter, the fired ceramic has high strength and can fix the ceramic liner plate.

[0033] The reason why this invention provides a fixing plate on the coke tank shell below the corner of the four adjacent liner plates in the conical section, forming a fixing ring, and coated with an anti-oxidation coating, is that ceramic liners may crack, break, or even fall off during long-term use. Since the number of fixing bolts is limited, the fixing plate on the coke tank shell below the corner of the four adjacent liner plates, forming a fixing ring, can prevent the liner from falling off after breakage, allowing it to continue to be used. Even if it falls off, it will be in small pieces and will not block the coke discharge valve. The anti-oxidation coating on the fixing plate prevents high-temperature oxidation and extends its service life.

[0034] The reason why this invention applies an aluminum dihydrogen phosphate solution-containing grout to the refractory ramming compound grout of ceramic lining plate one or ceramic lining plate two is that the surface of the refractory ramming compound is not very smooth, and its strength generally requires a certain temperature to reach a high level, and it will not reach the surface of the ceramic lining plate. By applying an aluminum dihydrogen phosphate solution-containing grout to the refractory ramming compound grout, its fluidity is increased, and like a paint, the adhesion between the lining plate and the grout can be increased. The sealing performance will also be improved after high-temperature use.

[0035] Compared with the prior art, this invention, by adopting ceramic liners and optimizing the structure of dry quenching coke cans, makes the alloy or refractory cast steel liners of dry quenching coke cans less prone to damage, detachment, and burn-out, extending the service life of the liners from 3-6 months to more than 7 months, reducing the surface temperature of the coke can by 300-400℃, and reducing the cost by 30-50% compared to the present. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the dry quenching coke can of the present invention;

[0037] Figure 2 for Figure 1 A structural schematic diagram of ceramic liner plate one or ceramic liner plate two;

[0038] Figure 3 for Figure 1 Schematic diagram of the middle fixing plate;

[0039] In the diagram: 1—coke tank shell, 2—straight section lining, 3—conical section lining, 4—liner plate one, 5—gap one, 6—grout, 7—liner plate two, 8—gap two, 9—screw hole, 10—bolt, 11—groove, 12—shoulder, 13—fixing plate, 14—fixing plate ring, 15—anti-oxidation coating, 16—grout containing aluminum dihydrogen phosphate solution. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings:

[0041] Table 1 is a list of raw material composition and percentage content of various embodiments of the refractory ramming mix for grouting of the present invention;

[0042] Table 2 is a list of raw material composition and percentage content of the coatings used for anti-oxidation coatings in various embodiments of the present invention;

[0043] Table 3 is a list of raw material composition and percentage content of the grout containing aluminum dihydrogen phosphate solution in the embodiments of the present invention.

[0044] A type of dry-quenched coke can that is not easily detached mainly consists of a coke can shell 1, a straight cylindrical section liner 2 and a conical section liner 3 inside the coke can shell 1, liner plates 4 of the straight cylindrical section liner 2, gaps 5 between each pair of adjacent liner plates 4, grout 6 in the gaps 5, liner plates 7 of the conical section liner 3, gaps 8 between each pair of adjacent liner plates 7, grout 6 in the gaps 8, screw holes 9 on liner plates 4 and 7, bolts 10 in the screw holes 9, and slots 11. The key features are that: liner plates 4 and 7 are both made of ceramic; the width of gap 5 is not less than 10mm, and the gaps... The width of 28 is not more than 5mm, and the grout 6 is made of refractory ramming material; a shoulder 12 is machined on the upper part of the screw holes 9 in the first 4 and the second 7 of the liner plate. The diameter of the screw holes 9 above the upper end face of the shoulder 12 is larger than the diameter of the bolt 10 by 2.0mm / 2.5mm / 3.0mm / 2.3mm / 2.7mm, and the diameter of the remaining screw holes 9 is the same as the diameter of the bolt 10; a fixing plate 13 is welded to the coke shell 1 below the corner of the four adjacent second 7 liner plates of the conical section liner 3, forming a fixing plate ring 14, and an anti-oxidation coating 15 is applied to the fixing plate 13.

[0045] The height of the screw hole 9 above the upper end face of the shoulder 12 accounts for 30% / 35% / 47% / 39% / 43% of the respective thicknesses of ceramic liner 1 4 and liner 2 7.

[0046] The ceramic lining plates 4 and 7 have the following physical properties: their fire resistance temperature is above 1108℃, and they can withstand water cooling cycles at 1108℃ for 105 cycles or more, and their compressive strength is above 86MPa.

[0047] Its preparation method:

[0048] 1) Connect the ceramic liner to the coke oven shell using bolts in the screw holes and slots;

[0049] 2) After drying, the fixing plate coated with anti-oxidation paint is welded to the steel shell located between the ceramic lining plates;

[0050] 3) Lay ceramic liner plate 1 (4) and ceramic liner plate 2 (7) separately, and fix them to the coke tank shell 1 with bolts 10. Secure them to adjacent ceramic liner plates using the slots 11 machined on them. Fix one corner of each of every four adjacent ceramic liner plates 1 (4) or ceramic liner plate 2 (7) to the fixing plate 13 coated with anti-oxidation paint. During installation, ensure that the gap width between any two adjacent ceramic liner plates 1 (4) or ceramic liner plate 2 (7) is limited, i.e., the width of gap 5 is not less than [specified value].

[0051] 10mm is sufficient, and the width of gap 2 (8) should not be more than 5mm.

[0052] 4) Fill and ram the joints in gap 1 (5) and gap 2 (8) with refractory ramming compound and compact it.

[0053] You can also apply a grout containing aluminum dihydrogen phosphate solution to the refractory ramming compound after it has been compacted and rammed.

[0054] The raw material composition and weight percentage content of the grout containing aluminum dihydrogen phosphate solution are as follows: refractory ramming mix: 90-95%, aluminum dihydrogen phosphate solution: 5-10%; the refractory ramming mix is ​​a refractory ramming mix grout.

[0055] 5) Dry the product, allowing it to air dry naturally at any point within 1-2 days, then heat it at temperatures of 275℃ / 267℃ / 281℃ / 287℃.

[0056] Baked at 296℃ for 13.7h / 13.8h / 14h / 13.5h / 13.2h before being put into use.

[0057] Table 1. List of raw material composition and content (wt%) of the grouting agents in various embodiments of the present invention.

[0058]

[0059] Note: In the grouting agents of each embodiment in Table 1, the weight percentage of mullite particles with a size of 3 to 1 mm is not less than 45%.

[0060] Table 2. List of raw material composition and content (wt%) of the anti-oxidation coatings in various embodiments of the present invention.

[0061]

[0062] Note: In the examples of refractory ramming compound with aluminum dihydrogen phosphate solution in Table 2, the raw material ratios of the refractory ramming compound are the same as those in Table 1.

[0063] Table 3 List of test results used in various embodiments of the present invention

[0064]

[0065]

[0066] As shown in Table 3, the service life of the coke pot of the present invention is generally greater than 7 months, and usually more than 1 year. The surface temperature is reduced by 300-400℃, the energy-saving effect is significantly improved, the steam output and power generation of the dry quenching system are increased, and the economic benefits are improved.

[0067] This specific embodiment is merely a best example and is not intended to limit the implementation of the technical solution of the present invention.

Claims

1. A dry-quenched coke can that is not easily detached, mainly composed of a coke can shell, a straight cylindrical section liner and a conical section liner inside the coke can shell, a first liner plate of the straight cylindrical section liner, a first gap between every two adjacent first liner plates, grout in the first gap, a second liner plate of the conical section liner, a second gap between every two adjacent second liner plates, grout in the second gap, screw holes on the first and second liner plates, bolts in the screw holes, and slots, characterized in that: Both liner plate one and liner plate two are made of ceramic; the width of gap one is not less than 10mm, and the width of gap two is not more than 5mm. The grout is made of refractory ramming material; a shoulder is provided in the screw holes of liner plate one and liner plate two. The diameter of the screw hole above the upper end face of the shoulder is at least 2mm larger than the bolt diameter, and the diameter of the remaining screw hole is the same as the bolt diameter; a fixing plate is provided on the coke shell below the corner of the four adjacent liner plates two in the conical section liner. The fixing plate forms a fixing plate ring and is coated with an anti-oxidation coating.

2. The dry quenching coke can that is not easily detached as described in claim 1, characterized in that: The height of the screw holes above the upper end face of the shoulder accounts for 30-50% of the thickness of the ceramic liner.

3. The dry quenching coke can that is not easily detached as described in claim 1, characterized in that: The ceramic liner plates one and two have the following physical properties: a fire resistance temperature of not less than 1100℃, a water cooling cycle of not less than 100 times at 1100℃, and a compressive strength of not less than 80MPa.

4. The dry quenching coke can that is not easily detached as described in claim 1, characterized in that: The raw material composition and weight percentage of the refractory ramming material used in the grout are as follows: mullite: 55-75%; aluminum powder: 1-7%; iron oxide powder: 5-15%; silicon carbide powder: 3-15%; sodium tetraborate powder: 0.5-5%; aluminum dihydrogen phosphate solution: 2.5-15%; among which, the weight percentage of mullite particles with a size of 1-3mm is not less than 45%.

5. A dry quenching coke can that is not easily detached as described in claim 1, characterized in that: The coating for the anti-oxidation coating has the following composition and weight percentage content: sodium silicate: 15-45%; sodium borate: 3-12%; sodium bentonite: 1-5%; silicon carbide powder: 45-75%; and water is added at 8-20% of the total weight percentage of the above raw materials.

6. The dry quenching coke can that is not easily detached as described in claim 1, characterized in that: A grout containing aluminum dihydrogen phosphate solution is applied to the refractory ramming compound of ceramic lining plate one or ceramic lining plate two. The raw material composition and weight percentage content of the grout containing aluminum dihydrogen phosphate solution are as follows: refractory ramming mix: 90-95%, aluminum dihydrogen phosphate solution: 5-10%; the refractory ramming mix is ​​a refractory ramming mix grout.

7. The method for preparing a dry quenching coke can that is not easily detached as described in claim 1, comprising the following steps: 1) Connect the ceramic liner to the coke oven shell using bolts in the screw holes and slots; 2) After drying, the fixing plate coated with anti-oxidation paint is welded to the steel shell located between the ceramic lining plates; 3) Lay ceramic liner plate one and ceramic liner plate two separately, and fix them to the coke tank shell with bolts. Secure them to the adjacent ceramic liner plates through the grooves provided on them. Fix one corner of each of every four adjacent ceramic liner plates one or ceramic liner plate two to the fixing plate coated with anti-oxidation paint. When laying, ensure that the width of the gap between each two adjacent ceramic liner plates one or ceramic liner plate two is limited, that is, the width of gap one is not less than 10mm and the width of gap two is not more than 5mm. 4) Fill and ram the gaps in gap one and gap two with refractory ramming material and ram them to solidify them; 5) Dry the product. After natural drying for 1 to 2 days, bake it at a temperature not exceeding 300℃ for at least 12 hours before putting it into use.

Images