CN112979330B - Carbon deposition prevention coating material for coke pot lining plate and use method - Google Patents

Carbon deposition prevention coating material for coke pot lining plate and use method Download PDF

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CN112979330B
CN112979330B CN202110345494.7A CN202110345494A CN112979330B CN 112979330 B CN112979330 B CN 112979330B CN 202110345494 A CN202110345494 A CN 202110345494A CN 112979330 B CN112979330 B CN 112979330B
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coke
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CN112979330A (en
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徐国涛
盛军波
涂红兵
冯强
王大春
刘黎
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B39/00—Cooling or quenching coke
    • C10B39/02—Dry cooling outside the oven
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/386—Boron nitrides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428—Silicon

Abstract

The coating material for preventing carbon deposition for the coke tank lining plate comprises the following raw materials in percentage by weight: 20-30% of mullite aggregate, 5-15% of silicon carbide, and mullite micropowder aggregate: 5-12% of andalusite, 5-10% of mullite, 25-35% of mullite, 5-15% of silicon carbide, 0.1-5% of boron nitride, 1-5% of metal silicon powder, 1-8% of organic silicon resin solution, 3-8% of microcrystalline glass powder, 5-15% of silica sol with the silicon oxide content of 32-40% and 0.01-1% of sodium polyacrylate; the using method comprises the following steps: firstly, punching anchoring nails at the position of a lining plate of a coke tank to be coated, and then arranging a stainless steel wire mesh; welding the stainless steel wire mesh on the anchoring nail in parallel; coating the coating material on a stainless steel wire mesh to be completely coated; collecting pulp by using plastic fiber cloth; naturally drying; heating; preserving heat; and (5) standby. The method can improve the service cycle of the coke pot lining plate from 3-6 months to at least 7 months and reduce the temperature of the outer surface of the coke pot shell by 150-.

Description

Carbon deposition prevention coating material for coke pot lining plate and use method
Technical Field
The invention relates to the technical field of dry quenching in the coking industry, in particular to a coating material for preventing carbon deposition for a coke tank lining plate and a construction method, which are particularly suitable for local repair of the coke tank lining plate.
Background
Compared with wet quenching, the dry quenching technology (CDQ) has obvious advantages, can recover the sensible heat of red coke, improve the coke strength, is beneficial to the iron-making operation of a blast furnace and reduces the coke ratio. The dry quenching device has long service life, and if the dry quenching production volume of an enterprise is not surplus, the iron-making production is influenced when the production is required to be stopped for maintenance due to reasons, and even the normal production of iron-making can not be ensured.
Due to the continuous operation of the coke dry quenching system, the coke drum, which is in direct contact with the red coke, must have a high operational reliability. Therefore, the straight section of the coke pot lining plate is made of heat-resistant iron castings, such as QT600-3, G35Cr24Ni7, ZG3Cr7Si2 or heat-resistant stainless steel 20X23H 18; the cone section and the bottom gate part lining plate are made of heat-resistant cast steel ZG35Cr24Ni7SiN, heat-resistant stainless steel 20X23H18, and the like. And the lining plate of the coke tank part is made of heat-resistant stainless steel. The above-mentioned material has good wear resistance and heat resistance, and can resist 1100 deg.C in short time. However, coke oven sometimes has over-production phenomenon of coke, and the coke produced or the coke on the oven head contains tar which can be adhered on the lining plate of the coke tank, so that the lining plate is burnt and damaged, thereby affecting the turnover of the coke tank.
After retrieval:
the high-temperature anti-sticking lubricating coating is prepared from a high-temperature resistant binder, a high-temperature resistant solid lubricant, a high-temperature anti-sticking agent, a wetting agent, a surfactant, a thickening agent, a solvent and the like according to the document with the Chinese patent publication No. CN 1299851A. The high-temperature binder can be disodium hydrogen phosphate or/and diammonium hydrogen phosphate, the high-temperature resistant solid lubricant is graphite, the high-temperature anti-sticking agent is boron nitride, the wetting agent is ammonia water, the surfactant is a leveling agent, the thickening agent is carboxymethyl cellulose, and the solvent is water. This document is suitable for the anti-sticking and lubrication of mechanical equipment in high temperature conditions. The anti-sticking agent is boron nitride, so that the bonding phase can not resist high temperature, and the anti-sticking agent is not suitable for the high-temperature repeated use of the coke tank.
The document with Chinese patent publication No. CN104177957A discloses that the high-temperature anti-sticking coating comprises the following components in parts by weight: 20-40 parts of dibutyl phthalate, 12-18 parts of graphite powder, 10-30 parts of acrylic resin, 8-12 parts of zinc acetate, 16-20 parts of sulfurous acid, 4-6 parts of isopropanol, 8-12 parts of methyl ethyl ketone, 10-20 parts of vinyl acetate, 6-12 parts of trimethoxy silane, 4-8 parts of acetone and 2-4 parts of epoxy resin. The high-temperature-resistant nut is suitable for the joint of a bolt and a nut of a high-temperature component, prevents mutual adhesion, is convenient to disassemble, and can resist high temperature of more than 800 ℃. However, since the anti-sticking agent is graphite, it is difficult to stick, and the binder is easily oxidized.
The Chinese patent publication No. CN104311079A, the high temperature resistant anti-sticking steel nano ceramic powder coating comprises the following components by weight percent: 10-12% of silicon powder, 20-25% of titanium carbide, 15-18% of titanium nitride ceramic powder and 50-55% of cobalt-based tungsten carbide. The high-temperature resistant anti-sticking steel powder coating disclosed by the document has good bonding force, excellent burning-sticking prevention function and protection function on a metal substrate, and has the advantages of bonding prevention, good lubricity, wear resistance, crack resistance, oxidation resistance, corrosion resistance, high temperature resistance and the like. However, these are expensive raw materials and can only be sprayed, and it is difficult to handle them on the lining plate of the coke oven tank and to control the high-temperature deformation of the whole lining plate.
The document with chinese patent publication No. CN105219257A discloses that the high-temperature anti-sticking lubricating coating includes organic silicon modified inorganic phosphate resin, tungsten disulfide powder, layered graphite powder, metal oxide powder, soft metal powder, hexagonal boron nitride powder and organic solvent, and is particularly suitable for engine turbochargers and exhaust pipes. In addition, the anti-sticking lubricating oil can be applied to anti-sticking lubricating treatment under high-temperature and radiation working conditions in equipment such as aeroengines and nuclear power stations. The tungsten disulfide powder and the layered graphite powder are easily worn by coke.
The Chinese patent publication No. CN103601513A discloses that the alumina hollow ball high-viscosity light refractory coating is composed of the following raw materials: 40-50% of alumina hollow spheres, 5-15% of white corundum fine powder, 10-20% of alumina micro powder, 10-20% of pure calcium aluminate cement and 5-15% of 20-40% of aluminum dihydrogen phosphate solution. The alumina hollow sphere high-viscosity light refractory coating material has the characteristic of high viscosity, is good in adhesion, can be quickly combined with an original furnace lining when being coated at cracks or pits, is short in maintenance time, and can be quickly baked and used. After high-temperature heat treatment, the coating can be sintered with an old lining, has high strength, good thermal shock resistance, difficult cracking and good repairing effect, and can effectively improve the heat insulation effect and prolong the service life of the alumina hollow ball lining in the high-temperature kiln. The cement of the invention is alkaline, the aluminum dihydrogen phosphate is an acidic material, the cooperation reaction of the two is too fast, the hardening is fast, the construction is difficult, and the carbon deposition is not resisted.
The Chinese patent publication No. CN104909779A discloses a mullite refractory coating, which comprises the following components in parts by weight: 30-40 parts of 3-1mm mullite aggregate, 5-15 parts of 1-0mm flint clay aggregate, 10-20 parts of 0.5-0mm flint clay aggregate, 11-21 parts of mullite powder, 4-6 parts of modified kaolin, 5-7 parts of aluminate cement, 1-3 parts of mullite 1-5 mu m whisker, 1-3 parts of titanium nitride 1-5 mu m whisker and 3-5 parts of additive, and alumina sol accounting for 10-18% of the total weight is added; PH 4.5. In the document, the cement is bound to be alkaline, the alumina sol is acidic, and the coating and hardening are fast, so that the construction is difficult and the adhesion is difficult to prevent.
The Chinese patent publication No. CN106083080A is composed of the following components in percentage by mass: 5-1 mm of three-grade high bauxite: 45-50%; 1-0mm of first-grade high-alumina bauxite: 10-15%; the first-grade high-alumina bauxite is less than 180 meshes: 23-28%; pure calcium aluminate cement: 7-8%; silicon micropowder: 2-3%; soft clay: 2-3%; meanwhile, the added water reducing agent is 0.02-0.05%; and 0.03-0.06% of external flocculant. The water adding amount of the coating material during construction is greatly reduced by adding the water reducing agent, so that the strength of the coating material is improved; by adding the flocculating agent, the coating material does not increase the construction water addition amount, and the coating material added with the water reducing agent loses the fluidity, so that the coating material has good coating construction performance; the early strength cement with high CA phase content is used to further improve the strength of the coating. The use of alumina in this publication results in poor thermal destruction resistance, poor bonding effect with the substrate due to the combination of pure calcium aluminate cement, and difficulty in preventing bonding.
From a literature search: the main components of the anti-sticking coating are BN, graphite, high-temperature-resistant alloy powder and metal powder, and the coating materials are calcium aluminate cement, aluminium dihydrogen phosphate, sol-combined corundum, mullite and high-alumina. Therefore, it is urgently needed and necessary to develop a coating material for preventing carbon deposition for a coke pot lining plate so as to meet the requirements of lining plate maintenance and ensuring smooth production.
Disclosure of Invention
The invention aims to solve the problems of easy scorching loss and easy falling of a coke dry quenching coke pot lining plate in the technical field, and provides a smearing material for preventing carbon deposition by coating a layer of the smearing material for preventing carbon deposition on the existing material lining plate, and the final forming of the coating is formed by self sintering in use without special sintering, the formed coating not only ensures that tar is difficult to soak, but also ensures that the coke pot lining plate does not generate the phenomena of scorching and is difficult to generate the problems of burning loss and falling, the service cycle of the coke pot lining plate can be prolonged to at least 7 months from the current 3-6 months, and the temperature of the outer surface of a coke pot shell is reduced to 150-.
The technical measures for realizing the purpose are as follows:
the carbon deposition preventing coating material for the coke pot lining plate comprises the following raw materials in percentage by weight: the mullite aggregate with the granularity of 3-1 mm: 20-30%, silicon carbide with granularity of 3-1 mm: 5-15%, mullite aggregate with the granularity less than or equal to 1 mm: 5-12%, andalusite with the granularity less than or equal to 0.1 mm: 5-10%, mullite with the granularity less than or equal to 0.045 mm: 25-35%, silicon carbide with granularity less than or equal to 0.045 mm: 5-15%, boron nitride with granularity less than or equal to 0.045 mm: 0.1-5%, and metal silicon powder with the granularity less than or equal to 0.045 mm: 1-5%, water-soluble organic silicon resin solution: 1-8%, and microcrystalline glass powder with granularity not more than 0.045 mm: 3-8%, silica sol with the content of silicon oxide of 32-40%: 5-15%, polymerized sodium acrylate: 0.01 to 1 percent.
It is characterized in that: the microcrystalline glass powder with the granularity less than or equal to 0.045mm comprises the following components in percentage by weight: b is2O3：6％～ 13％；SiO2：55％～65％；Al2O3：6％～15％；Na2O：10％～16％；K2O: 2% -5%; it is prepared by conventional method.
A method for using carbon deposition prevention coating material for a coke pot lining plate comprises the following steps:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh or a rhombic mesh with the side length of not less than 5 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) uniformly mixing the raw materials, smearing the smearing material until the stainless steel wire mesh is completely coated, and controlling the thickness of the coating layer to be not less than 3 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 300-500 ℃;
7) carrying out heat preservation at the temperature of 300-500 ℃, wherein the heat preservation time is not less than 2 h;
8) and (5) standby.
It is characterized in that: the coating is prepared by the following steps: firstly, uniformly stirring and mixing the solid raw materials; then adding silica sol and stirring uniformly; and then gradually adding the water-soluble organic silicon resin solution to form paste which is easy to coat.
The mechanism and action of each element and main process of the invention are as follows:
the mullite aggregate with the granularity of 3-1mm is adopted, and the addition amount of the mullite aggregate is controlled to be 20-30%, because the mullite has good thermal destruction resistance and high refractoriness, and the 3-1mm aggregate can play a role in framework support.
According to the invention, the silicon carbide with the granularity of 3-1mm is adopted, and the addition amount of the silicon carbide is controlled to be 5-15%, because the silicon carbide has good thermal destruction resistance, wear resistance and high refractoriness, and the aggregate with the granularity of 3-1mm can play a skeleton supporting role.
The mullite aggregate with the granularity less than or equal to 1mm is adopted, and the addition amount of the mullite aggregate is controlled to be 5-12%, because the mullite has good thermal destruction resistance and high refractoriness, and the aggregate less than or equal to 1mm can play a role in filling gaps with fine aggregate.
The andalusite with the granularity less than or equal to 0.1mm is adopted, and the addition amount of the andalusite is controlled to be 5-10%, so that the andalusite generates mullite at high temperature and has the effect of increasing the expansion amount to offset the sintering shrinkage of the matrix; the expansion amount of andalusite less than or equal to 0.1mm can be controlled.
The invention adopts the mullite with the granularity less than or equal to 0.045mm, and controls the addition amount of the mullite to be 25-35 percent, because the mullite has good thermal destruction resistance and high refractoriness, and fine powder less than or equal to 0.045mm can be used as a substrate.
The silicon carbide with the granularity less than or equal to 0.045mm is adopted, and the addition amount of the silicon carbide is controlled to be 5-15%, because the silicon carbide has good thermal destruction resistance, wear resistance and high refractoriness, and fine powder less than or equal to 0.045mm can be used as a matrix.
The invention adopts boron nitride with the granularity less than or equal to 0.045mm, and controls the addition amount of the boron nitride within 0.1-5 percent, because the boron nitride has good thermal destruction resistance and is not easy to bond tar.
According to the invention, the metal silicon powder with the particle size less than or equal to 0.045mm is adopted, and the addition amount is controlled to be 1-5%, because the silicon powder can promote sintering, plays a role of an antioxidant and slows down the oxidation of silicon carbide.
The water-soluble organic silicon resin solution is adopted, and the addition amount of the water-soluble organic silicon resin solution is controlled to be 1-8%, so that the water-soluble organic silicon resin solution can play a role of a low-temperature bonding agent, and the coating material at a low temperature has certain strength.
The invention adopts the microcrystalline glass powder with the granularity less than or equal to 0.045mm, and controls the adding amount to be 3-8%, because the microcrystalline glass powder is soft-melted at the middle temperature, has certain bonding strength, and can also promote the bonding and sintering of the matrix.
The invention adopts the silica sol with the silica content of 32-40 percent, and controls the adding amount of the silica sol to be 5-15 percent, because the silica sol can play the role of a medium-high temperature bonding agent, the coating material is ensured to have certain high-temperature strength.
The invention adopts the sodium polyacrylate and controls the adding amount of the sodium polyacrylate to be 0.01-1 percent, because the sodium polyacrylate can ensure that the coating has certain suspension property and good dispersion effect.
Compared with the prior art, the coating for preventing carbon deposition is coated on the basis of the lining plate made of the existing material, the coating is formed by self-sintering in use without special sintering in the final forming process, the formed coating not only enables tar to be difficult to soak, but also enables the lining plate of the coke tank not to generate the phenomena of coke adhesion and scorching and to be difficult to burn and fall off, the service cycle of the lining plate of the coke tank to be prolonged to at least 7 months from the current 3-6 months, and the temperature of the outer surface of the shell of the coke tank is reduced by 150-.
Drawings
FIG. 1 is a surface condition diagram of a coke oven lining board of the present invention after 6.5 months of local coating and repairing.
Detailed Description
Example 1
The carbon deposition preventing coating material for the coke pot lining plate comprises the following raw materials in percentage by weight: the mullite aggregate with the granularity of 3-1 mm: 24%, silicon carbide with the granularity of 3-1 mm: 5 percent of mullite aggregate with the granularity less than or equal to 1 mm: 11 percent of andalusite with the granularity less than or equal to 0.1 mm: 7 percent, mullite with the granularity less than or equal to 0.045 mm: 26 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 12 percent, boron nitride with the granularity less than or equal to 0.045 mm: 0.6 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 3%, water-soluble silicone resin solution: 2 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 4%, silica sol with a silica content of 32%: 5%, sodium polyacrylate: 0.4 percent.
The microcrystalline glass powder with the granularity less than or equal to 0.045mm has the component composition and the weight percentage content of B2O3：10％；SiO2：65％；Al2O3：8％；Na2O：12％；K2O: 5 percent; its melting point is 908 deg.C; it is prepared by conventional method.
A method for using carbon deposition prevention coating material for a coke pot lining plate comprises the following steps:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh with the side length of 5 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) smearing the evenly mixed smearing material to a stainless steel wire mesh to be completely coated, and controlling the thickness of the coating of the smearing material to be 3.5 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 315 ℃;
7) preserving heat at 315 ℃ for 3.2 h;
8) and (5) standby.
The coating is prepared by the following steps: firstly, mullite aggregate with the granularity of 3-1 mm: 23%, silicon carbide with the granularity of 3-1 mm: 5 percent of mullite aggregate with the granularity less than or equal to 1 mm: 12 percent of andalusite with the granularity less than or equal to 0.1 mm: 7 percent, mullite with the granularity less than or equal to 0.045 mm: 26 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 12 percent, boron nitride with the granularity less than or equal to 0.045 mm: 0.6 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 3 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 4%, sodium polyacrylate: 0.4 percent of the solid raw materials are stirred and mixed evenly; then adding 2% water-soluble organic silicon resin solution and stirring uniformly; and then 5% of silica sol with the silica content of 32% is added, so that the paste is easy to coat.
Through detection, the phenomenon of coke sticking and scorching, and the phenomenon of burning loss and shedding are not found in the embodiment after trial for 7 months; the temperature of the outer surface of the coke pot shell is reduced by 153.3 ℃.
Example 2
The carbon deposition preventing coating material for the coke pot lining plate comprises the following raw materials in percentage by weight: the mullite aggregate with the granularity of 3-1 mm: 20%, silicon carbide with granularity of 3-1 mm: 9 percent of mullite aggregate with the granularity less than or equal to 1 mm: 10 percent of andalusite with the granularity less than or equal to 0.1 mm: 5 percent, mullite with the granularity less than or equal to 0.045 mm: 28.4 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 10 percent, boron nitride with the granularity less than or equal to 0.045 mm: 2 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 1%, water-soluble silicone resin solution: 4 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 3%, silica sol with a silica content of 36%: 7%, sodium polyacrylate: 0.6 percent.
The microcrystalline glass powder with the granularity less than or equal to 0.045mm has the component composition and the weight percentage content of B2O3：9.5％；SiO2：61％； Al2O3：14％；Na2O：11％；K2O: 4.5 percent; its melting point is 1050 ℃. The preparation method comprises the steps of mixing, melting, cooling and grinding the components of oxides to prepare fine powder for later use.
A method for using carbon deposition prevention coating material for a coke pot lining plate comprises the following steps:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh with the side length of 7 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) smearing the evenly mixed smearing material to a stainless steel wire mesh to be completely coated, and controlling the thickness of the coating of the smearing material to be 10 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 400 ℃;
7) preserving heat at 400 ℃ for 3 h;
8) and (5) standby.
The coating is prepared by the following steps: firstly, mullite aggregate with the granularity of 3-1 mm: 20%, silicon carbide with granularity of 3-1 mm: 9 percent of mullite aggregate with the granularity less than or equal to 1 mm: 10 percent of andalusite with the granularity less than or equal to 0.1 mm: 5 percent, mullite with the granularity less than or equal to 0.045 mm: 28.4 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 10 percent, boron nitride with the granularity less than or equal to 0.045 mm: 2 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 1 percent, the grain size is less than or equal to 0.045 mm: 3%, sodium polyacrylate: 0.6 percent. The solid raw materials are stirred and mixed uniformly; then adding 4% water-soluble organic silicon resin solution and stirring uniformly; then 7 percent of silica sol with the silicon oxide content of 36 percent is added, so that the paste is easy to coat.
Through detection, the phenomenon of coke sticking and scorching, and the phenomenon of burning loss and shedding are not found in the embodiment after trial for 8 months; the temperature of the outer surface of the coke pot shell is reduced by 210 ℃.
Example 3
The carbon deposition preventing coating material for the coke pot lining plate comprises the following raw materials in percentage by weight: the mullite aggregate with the granularity of 3-1 mm: 25%, silicon carbide with the granularity of 3-1 mm: 6 percent of mullite aggregate with the granularity less than or equal to 1 mm: 6 percent of andalusite with the granularity less than or equal to 0.1 mm: 8 percent, mullite with the granularity less than or equal to 0.045 mm: 25.5 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 5.5 percent, boron nitride with the granularity less than or equal to 0.045 mm: 3 percent of metal silicon powder with the granularity less than or equal to 0.045 mm: 4%, water-soluble silicone resin solution: 1.1 percent, and microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 7%, silica sol with a silica content of 38%: 8.8%, sodium polyacrylate: 0.1 percent.
The microcrystalline glass powder with the granularity less than or equal to 0.045mm has the component composition and the weight percentage content of B2O3：12.5％；SiO2：62％； Al2O3：10％；Na2O：13％；K2O: 2.5 percent; the melting point is 1020 ℃; it is prepared by conventional method.
A method for using carbon deposition prevention coating material for a coke pot lining plate comprises the following steps:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh with the side length of 10 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) smearing the evenly mixed smearing material to a stainless steel wire mesh to be completely coated, and controlling the thickness of the coating of the smearing material to be 5 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 450 ℃;
7) preserving heat at 450 ℃ for 4 h;
8) and (5) standby.
The coating is prepared by the following steps: firstly, preparing mullite aggregate with the thickness of 3-1 mm: 25%, silicon carbide with the granularity of 3-1 mm: 6 percent of mullite aggregate with the granularity less than or equal to 1 mm: 6 percent of andalusite with the granularity less than or equal to 0.1 mm: 8 percent, mullite with the granularity less than or equal to 0.045 mm: 25.5 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 5.5 percent, boron nitride with the granularity less than or equal to 0.045 mm: 3 percent of metal silicon powder with the granularity less than or equal to 0.045 mm: 4 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 7%, sodium polyacrylate: 0.1 percent. The solid raw materials are stirred and mixed uniformly; then adding 1.1% water-soluble organic silicon resin solution and stirring uniformly; then 8.8 percent of silica sol with the silica content of 38 percent is added, so that the paste is easy to coat.
Through detection, the phenomenon of coke sticking and scorching, and the phenomenon of burning loss and shedding are not found in the embodiment after trial for 6.5 months; the temperature of the outer surface of the coke pot shell is reduced by 190 ℃.
Example 4
The carbon deposition preventing coating material for the coke pot lining plate comprises the following raw materials in percentage by weight: the mullite aggregate with the granularity of 3-1 mm: 21%, silicon carbide with the granularity of 3-1 mm: 10 percent of mullite aggregate with the granularity less than or equal to 1 mm: 7 percent of andalusite with the granularity less than or equal to 0.1 mm: 6 percent, mullite with the granularity less than or equal to 0.045 mm: 32.2 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 7 percent, boron nitride with the granularity less than or equal to 0.045 mm: 1 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 2%, water-soluble silicone resin solution: 2 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 5%, silica sol with a silica content of 36%: 6%, sodium polyacrylate: 0.8 percent.
The microcrystalline glass powder with the granularity less than or equal to 0.045mm has the component composition and the weight percentage content of B2O3：9％；SiO2：60％； Al2O3：13％；Na2O：14％；K2O: 4 percent; the melting point is 980 ℃; it is prepared by conventional method.
A method for using carbon deposition prevention coating material for a coke pot lining plate comprises the following steps:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh with the side length of 15 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) smearing the evenly mixed smearing material to a stainless steel wire mesh to be completely coated, and controlling the thickness of the coating of the smearing material to be 12 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 480 ℃;
7) preserving heat at 480 ℃ for 5 h;
8) and (5) standby.
The coating is prepared by the following steps: firstly, mullite aggregate with the granularity of 3-1 mm: 21%, silicon carbide with the granularity of 3-1 mm: 10 percent of mullite aggregate with the granularity less than or equal to 1 mm: 7 percent of andalusite with the granularity less than or equal to 0.1 mm: 6 percent, mullite with the granularity less than or equal to 0.045 mm: 32.2 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 7 percent, boron nitride with the granularity less than or equal to 0.045 mm: 1 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 2 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 5%, sodium polyacrylate: 0.8 percent of the solid raw materials are stirred and mixed evenly; then adding 2% water-soluble organic silicon resin solution and stirring uniformly; then 6 percent of silica sol with the silicon oxide content of 36 percent is added, so that the paste is easy to coat.
Through detection, the phenomenon of coke sticking and scorching, and the phenomenon of burning loss and shedding are not found in the embodiment after trial for 8 months; the temperature of the outer surface of the coke pot shell is reduced by 280 ℃.
Example 5
The carbon deposition preventing coating material for the coke pot lining plate comprises the following raw materials in percentage by weight: the mullite aggregate with the granularity of 3-1 mm: 27%, silicon carbide with the granularity of 3-1 mm: 5.5 percent of mullite aggregate with the granularity less than or equal to 1 mm: 5.5 percent of andalusite with the granularity less than or equal to 0.1 mm: 7.5 percent, mullite with the granularity less than or equal to 0.045 mm: 26.35 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 12 percent, boron nitride with the granularity less than or equal to 0.045 mm: 1.5 percent, and the metal silicon powder with the granularity less than or equal to 0.045 mm: 2.5%, water-soluble silicone resin solution: 3 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 3.5%, silica sol with a silica content of 32.5%: 5.5%, sodium polyacrylate: 0.15 percent.
The microcrystalline glass powder with the granularity less than or equal to 0.045mm has the component composition and the weight percentage content of B2O3：11％；SiO2：64.5％； Al2O3：11％；Na2O：10.5％；K2O: 3 percent; its melting point is 1075 ℃; it is prepared by conventional method.
A method for using carbon deposition prevention coating material for a coke pot lining plate comprises the following steps:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh with the side length of 12 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) smearing the evenly mixed smearing material to a stainless steel wire mesh to be completely coated, and controlling the thickness of the coating of the smearing material to be 7 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 350 ℃;
7) preserving heat at 350 ℃ for 6 h;
8) and (5) standby.
The coating is prepared by the following steps: firstly, mullite aggregate with the granularity of 3-1 mm: 27%, silicon carbide with the granularity of 3-1 mm: 5.5 percent of mullite aggregate with the granularity less than or equal to 1 mm: 5.5 percent of andalusite with the granularity less than or equal to 0.1 mm: 7.5 percent, mullite with the granularity less than or equal to 0.045 mm: 26.35 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 12 percent, boron nitride with the granularity less than or equal to 0.045 mm: 1.5 percent, and the metal silicon powder with the granularity less than or equal to 0.045 mm: 2.5 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 3.5%, sodium polyacrylate: 0.15 percent of the solid raw materials are stirred and mixed evenly; then adding 3% water-soluble organic silicon resin solution and stirring uniformly; then 5.5% of silica sol with the silica content of 32.5% is added, so that the paste is easy to coat.
Through detection, the phenomenon of coke sticking and scorching, and the phenomenon of burning loss and shedding are not found in the embodiment after trial for 6.5 months; the temperature of the outer surface of the coke pot shell is reduced by 260 ℃.
Example 6
The carbon deposition preventing coating material for the coke pot lining plate comprises the following raw materials in percentage by weight: the mullite aggregate with the granularity of 3-1 mm: 28%, silicon carbide with the granularity of 3-1 mm: 6.5 percent of mullite aggregate with the granularity less than or equal to 1 mm: 6.5 percent of andalusite with the granularity less than or equal to 0.1 mm: 5.5 percent, mullite with the granularity less than or equal to 0.045 mm: 25.5 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 6.5 percent, boron nitride with the granularity less than or equal to 0.045 mm: 0.8 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 3.5%, water-soluble silicone resin solution: 6 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 4.5%, silica sol with a silica content of 36%: 6.5%, sodium polyacrylate: 0.2 percent.
The microcrystalline glass powder with the granularity less than or equal to 0.045mm has the component composition and the weight percentage content of B2O3：10.5％；SiO2： 63.5％；Al2O3：9.5％；Na2O：13％；K2O: 3.5 percent; its melting point is 970 ℃. The preparation method comprises the steps of mixing, melting, cooling and grinding the components of oxides to prepare fine powder for later use.
A method for using carbon deposition prevention coating material for a coke pot lining plate comprises the following steps:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh with the side length of 10 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) smearing the evenly mixed smearing material to a stainless steel wire mesh to be completely coated, and controlling the thickness of the coating of the smearing material to be 8 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 450 ℃;
7) preserving heat at 450 ℃ for 3 h;
8) and (5) standby.
The coating is prepared by the following steps: firstly, mullite aggregate with the granularity of 3-1 mm: 28%, silicon carbide with the granularity of 3-1 mm: 6.5 percent of mullite aggregate with the granularity less than or equal to 1 mm: 6.5 percent of andalusite with the granularity less than or equal to 0.1 mm: 5.5 percent, mullite with the granularity less than or equal to 0.045 mm: 25.5 percent, silicon carbide with the granularity less than or equal to 0.045 mm: 6.5 percent, boron nitride with the granularity less than or equal to 0.045 mm: 0.8 percent, metal silicon powder with the granularity less than or equal to 0.045 mm: 3.5 percent of microcrystalline glass powder with the granularity less than or equal to 0.045 mm: 4.5%, sodium polyacrylate: 0.2 percent of the solid raw materials are stirred and mixed evenly; then adding 6% water-soluble organic silicon resin solution and stirring uniformly; then 6.5 percent of silica sol with the silicon oxide content of 36 percent is added, so that the paste is easy to coat.
Through detection, the phenomenon of coke sticking and scorching, and the phenomenon of burning loss and shedding are not found in the embodiment after trial for 8.5 months; the temperature of the outer surface of the coke pot shell is reduced by 280 ℃.
The above embodiments are only preferred embodiments, and are not intended to limit the technical solutions of the present invention.

Claims (3)

1. The utility model provides a coke drum welt is with coating material that prevents carbon deposit which characterized in that: the raw materials and weight percentage content are as follows: the mullite aggregate with the granularity of 3-1 mm: 20-30%, silicon carbide with granularity of 3-1 mm: 5-15%, mullite aggregate with the granularity less than or equal to 1 mm: 10-15%, andalusite with the granularity less than or equal to 0.1 mm: 5-10%, mullite with the granularity less than or equal to 0.045 mm: 25-35%, silicon carbide with granularity less than or equal to 0.045 mm: 5-15%, boron nitride with granularity less than or equal to 0.045 mm: 0.1-5%, and metal silicon powder with the granularity less than or equal to 0.045 mm: 1-5%, water-soluble organic silicon resin solution: 1-8%, and microcrystalline glass powder with granularity not more than 0.045 mm: 3-8%, silica sol with the content of silicon oxide of 32-40%: 5-15%, polymerized sodium acrylate: 0.01-1%;
the microcrystalline glass powder with the granularity less than or equal to 0.045mm comprises the following components in percentage by weight: b is2O3：6％～13％；SiO2：55％～65％；Al2O3：6％～15％；Na2O：10％～16％；K2O: 2% -5%; the melting point of the alloy is not lower than 900 ℃.
2. The method of using the carbon deposit preventing coating for the coke pot lining plate as claimed in claim 1, which comprises the steps of:
1) firstly, anchoring nails are punched on the coke tank lining plate to be coated, and then a stainless steel wire mesh is arranged, wherein the diameter of the stainless steel wire is less than or equal to 2mm, and the mesh is a square mesh or a rhombic mesh with the side length of not less than 5 mm;
2) welding the stainless steel wire mesh on the anchoring nail in parallel;
3) uniformly mixing the coating material of claim 1, coating the coating material on a stainless steel wire mesh to be completely coated, and controlling the thickness of the coating material to be not less than 3 mm;
4) collecting pulp by using plastic fiber cloth, and scraping the surface;
5) naturally drying;
6) heating is carried out; stopping heating when the heating temperature reaches 300-500 ℃;
7) carrying out heat preservation at the temperature of 300-500 ℃, wherein the heat preservation time is not less than 2 h;
8) and (5) standby.
3. The method of using the coating for preventing carbon deposition for the coke pot lining plate as claimed in claim 2, wherein: the coating is prepared by the following steps: uniformly stirring and mixing the solid raw material of claim 1; then adding silica sol and stirring uniformly; and then gradually adding the water-soluble organic silicon resin solution to form paste which is easy to coat.
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