CN111662730B - Composite lining plate for spliced coke tank and preparation method - Google Patents
Composite lining plate for spliced coke tank and preparation method Download PDFInfo
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- CN111662730B CN111662730B CN202010553212.8A CN202010553212A CN111662730B CN 111662730 B CN111662730 B CN 111662730B CN 202010553212 A CN202010553212 A CN 202010553212A CN 111662730 B CN111662730 B CN 111662730B
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- 239000000571 coke Substances 0.000 title claims abstract description 95
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 85
- 239000002184 metal Substances 0.000 claims abstract description 85
- 238000004873 anchoring Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 229910052849 andalusite Inorganic materials 0.000 claims description 7
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 7
- 229910052863 mullite Inorganic materials 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 239000011368 organic material Substances 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical group [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010791 quenching Methods 0.000 description 23
- 230000000171 quenching effect Effects 0.000 description 23
- 239000010935 stainless steel Substances 0.000 description 14
- 229910001220 stainless steel Inorganic materials 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 239000011819 refractory material Substances 0.000 description 12
- 230000003014 reinforcing effect Effects 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229910016006 MoSi Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
A composite lining board for splicing coke cans consists of a metal shell, anchoring pieces and a castable layer, wherein the metal shell consists of at least two fans; an anchoring piece is arranged on the metal shell and is connected with the metal net layer; coating a buffer layer; an insulation board is arranged between the metal shell and the castable layer, and the anchoring piece is connected with the metal shell; the upper end and the lower end of each metal shell are respectively provided with a first connecting piece or a second connecting piece which are in matched connection. The preparation method comprises the following steps: placing the metal shell into a mold; the anchoring piece is welded on the metal shell, and the upper end and the lower end of the outer wall of the metal shell are matched and connected with the first connecting piece or the second connecting piece; the metal net layer is fixed on the anchoring piece; coating a buffer layer; coating a refractory adhesive in the metal shell and paving an insulation board; pouring a pouring material layer; standing and maintaining; baking; and (5) standby. On the premise of not increasing the manufacturing cost, the replacement period is prolonged from original 6-12 months to at least 12 months, and the maintenance cost can be reduced by at least 20%.
Description
Technical Field
The invention relates to equipment for dry quenching in the coking industry, in particular to a structure of a lining plate of a refractory material composite coke tank.
Background
Compared with wet quenching, the dry quenching technology (CDQ) has obvious advantages, can recycle red Jiao Xianre, improve the coke strength, and is beneficial to the ironmaking operation of a blast furnace and reduces the coke ratio. The service life of the dry quenching equipment is long, if the dry quenching production capacity of enterprises is not excessive, the shutdown maintenance has great influence on ironmaking production, and the problems of notch and guarantee of the ironmaking dry quenching exist.
The coke tank is arranged on a coke tank carrier vehicle and is pulled by an electric locomotive to reciprocate under a coke oven hole and a dry quenching lifting derrick. Jiao Guanzhuang conveying the red coke pushed out by the carbonization chamber to the top of the dry quenching furnace, matching with a loading device, and loading the red coke into the dry quenching furnace. Because of the continuous operation of the dry quenching system, the coke drum, which is required to be in direct contact with the red coke, must have high operational reliability. The temperature of the mature red hot coke pushed out from the coke oven carbonization chamber is about 1050+/-50 ℃, the rotating coke tank is driven by a driving motor to drive a speed reducer to rotate the coke tank around the center in the coke receiving process, and the speed reducer rotates 6-9 revolutions per minute, so that the loading coefficient of the coke can be improved, the weight and the volume of the coke tank are reduced, and meanwhile, the particle size distribution of the coke in the coke tank can be improved. The rotary coke tank mainly comprises a coke tank body, a lining plate, a suspender, a transmission rod, an annular octagonal beam, a guide wheel set, a bottom gate, a buffer seat, refractory materials, a lubricating pipeline and the like. The coke tank body is mainly formed by welding a 10mm thick steel plate and T-shaped steel, and is used as a support of the whole coke tank body, and the structural member is made of Q345B. The coke drum lining plate is used as a component in direct contact with red and hot coke, and the part of the material needs to have strong heat resistance and wear resistance, strength and toughness in a hot state and the capability of adapting to alternating cold and hot. The straight section of the lining material adopts heat-resistant iron castings, and the materials are QT 600-3, G35Cr24Ni7, ZG3Cr7Si2 or heat-resistant stainless steel 20X23H18; 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 have good wear resistance and heat resistance, and can resist 1100 ℃ in a short time. Some lining plates of coke tank parts of companies are made of heat-resistant stainless steel, and connecting bolts contacted with red coke are made of large square head structures and stainless steel, so that the lining plates are firmly and reliably connected with a coke tank framework; so as to improve the service life of the lining board, avoiding premature failure thereof.
The heat-resistant cast iron has good high temperature resistance, low material price, high hardness, large brittleness, poor thermal fatigue performance and short service life, and is generally only used for side wall lining plates. The medium chromium cast steel ZG3Cr7Si2 has good high temperature resistance, good chilling shock resistance, better performance and moderate price, and has the defect that the heat insulation performance is inferior to that of heat-resistant stainless steel; the service life is shorter and the cost is higher. The heat-resistant alloy steel can resist the high temperature of 1130 ℃, but has high price, poor processing performance and difficult manufacture, and some domestic materials need import.
Because the service lives of the coke tank and the coke tank cover are shorter, the lining plate falls off, burns out and causes various equipment problems in the use process, and the normal production of the coke dry quenching is affected. The lining plates of the dry quenching rotary coke tank of a certain company are cast 2520 cast steel blocks, and the lining plates need to be replaced integrally once on average for 0.5-1 year. Because of the problems of materials and production operation, partial furnace number furnace head coke is deviated to produce a cake coke tank, and a lining plate is burned for a long time, so that the local replacement of the lining plate of the coke tank is too frequent, and the maintenance cost is high; frequent replacement of the liner plate causes a decrease in dry quenching rate, a decrease in steam yield, and a decrease in coke quality. If the damaged lining plate falls into the dry quenching furnace, the physical health of the maintainer can be seriously threatened in the treatment process. The bottom lining plate is easy to fall off, so that the red coke directly burns out of the coke cage frame structure, and the service life is short. Generally, 1-2 months of repair personnel need to stop the repair of the lower structure of the focusing tank cage frame once, and because of the heavy time tightening task, the repair personnel are forced to water, cool and cool the focusing tank, and the lining plate and the structure of the quenching and rapid heating focusing tank are greatly damaged. Frequent overhauling causes equipment materials and labor cost to be in a high-consumption state all the time, the deformation of the structure is seriously difficult to correct after repeated repair, the lining plate is difficult to install, and the service life of the cage frame can be greatly shortened due to vicious circle.
In the retrieved data, the lining plate body of the dry quenching coke tank described in the Chinese patent CN108485684A is made of refractory castable, and is formed by molding and baking; the lining board keel is made of stainless steel with the diameter of 12mm and is made into a pi-shaped bracket, and the pi-shaped bracket is arranged in the length direction of the block body. The middle part of the top end of the n-shaped stainless steel bracket is welded with the head part of a bolt, so that the screw rod is vertical to the plane of the bracket and extends out of the surface of the block for a certain distance. The problem is that the diameter of a stainless steel keel in the refractory castable is too thick, the expansion coefficient is far larger than that of the refractory material, and the stainless steel keel is not firmly fixed by one bolt, so that cracking is easy to cause.
The thickness of the lower end of the liner plate at the root of the straight cylinder of the coke tank described in Chinese patent CN108531199A is increased by 35mm compared with the original design value of the liner plate; the thickness of the lining plate of the lower cone coke discharging opening is reduced by 10mm compared with the original design value of the lining plate; wherein the material of the lining plate at the root of the straight cylinder of the coke tank changes the stainless steel material of the original design into refractory castable. The problem is similar to CN108485684 a.
The composite lining board of the circular dry quenching coke tank in Chinese patent CN208980641U comprises a plurality of lining boards at the bottom of the coke tank, a conical section lining board, a cylindrical section lining board or an upper edge lining board, wherein a plurality of longitudinal ribs and a plurality of transverse ribs are arranged on the inner surface of each lining board, so that a plurality of grooves are formed on the inner surface of each lining board, through holes connected with the coke tank are formed in each lining board, or/and mounting columns connected with the coke tank are arranged on the back surface of the lining board, and a nano ceramic layer is arranged on the inner surface of each lining board. The problem is that the different lining boards are only provided with the longitudinal convex ribs and the transverse convex ribs, the nano ceramic layers are arranged between the grooves, the expansion coefficients of the ceramic layers and the steel structural members are greatly different, and the lining boards are easy to expand, crack and fall.
The dry quenching coke tank lining plate described in China patent CN204265692U comprises a lining plate body, wherein the lining plate body is provided with a wire planting bolt hole and a connecting plate pin hole. The novel lining board is characterized in that a 90-degree corner hook is arranged on the back surface of the lining board body, an adjacent board connecting through hole is formed in the 90-degree corner hook, and an adjacent board connecting piece penetrates through the through hole. The purpose of this is simply to secure adjacent liners.
The coke tank lining plate described in Chinese patent CN203036233U comprises a lining plate body and a hook, and is characterized by also comprising a fastening device; can make the burnt jar welt form a whole with the jar body better, significantly reduced the removal of burnt jar welt, also corresponding reduction its expend with heat and contract with cold's deformation has improved burnt jar welt's life.
The high-temperature wear-resistant lining plate for the dry quenching coke tank disclosed in the Chinese patent CN102212820A is characterized by comprising a metal lining plate and a metal ceramic layer which is coated on the surface of the metal lining plate, wherein the coated metal ceramic layer is high-temperature-resistant and wear-resistant, and the problem is that the coke tank is too much in cold and hot circulation, the expansion coefficient of a metal part and the expansion coefficient of ceramic are difficult to match, and cracking and peeling are easy.
The wear-resistant castable for the coke tank described in China patent CN110668832A comprises the following components: alumina with the thickness of less than or equal to 5 mm: 30-68 parts; alumina hollow sphere with granularity less than or equal to 3 mm: 10-45 parts; alumina micropowder: 1-5 parts; silicon micropowder: 5-12 parts; pure calcium aluminate cement: 3-10 parts; dispersing agent: 0.1 to 1 part; explosion-proof agent: 0.1 to 1 part; tartaric acid: 0.02 to 0.03 portion. The wear-resistant castable for the coke tank has good compressive strength, breaking strength and wear resistance, but has poor rapid cooling and rapid heating performance and is easy to crack.
The castable composition for manufacturing the coke tank lining described in China patent CN109704792A comprises: bauxite with granularity ranging from 5mm to 8 mm: 10% -22%; calcium hexaluminate with particle size ranging from 3mm to 5 mm: 20% -38%; calcined quartz with particle size ranging from 1mm to 3 mm: 6% -10%; forsterite with a particle size of less than or equal to 1 mm: 11% -21%; magnesium aluminate spinel with 180 mesh granularity: 9% -19%; ethyl silicate: 2% -7%; hydrated alumina having a particle size of less than 0.088 mm: 2% -10%; dextrin: 1% -4%; water reducing agent: 1 to 3 percent. The problem is similar to CN110668832 a.
The high thermal shock resistance wear-resistant prefabricated part for the dry quenching coke tank described in China patent CN110294623A comprises the following components: 20-30 parts of silicon carbide whisker; 40-60 parts of bauxite-based homogeneous material; 5-10 parts of silica micropowder; 1-3 parts of water; 0.2-0.6 part of water reducer; 15-20 parts of alpha-Al 2O3 powder; 8-12 parts of MoSi 2 powder. The problem is that the alumina has poor thermal shock resistance, the silicon-molybdenum powder has high price, and the prefabricated member has poor effect.
The protection structure of the cone section outlet of the coke tank disclosed in China patent CN209669129U comprises a cone section positioned at the lower part of the coke tank, wherein the bottom of the cone section is a cone section outlet formed by pouring refractory materials, a circle of reinforcing rib plates are completely embedded in the refractory materials of the cone section outlet, and the reinforcing rib plates are fixedly connected with the inner wall of the cone section; the edge of the inner ring of the cone section outlet is also provided with a ring of stainless steel guard ring, and the stainless steel guard ring is connected with the reinforcing rib plate to form a protective groove for wrapping the bottom of the cone section outlet. Through the design of the reinforcing rib plates, the reinforcing rib plates are matched with the poured refractory materials, so that the integral strength of the outlet of the cone section is enhanced, collapse caused by ablation is avoided, and the service life of the coke tank with the novel protective structure is prolonged; meanwhile, the stainless steel guard ring is used for cladding and protecting the refractory material, so that the problem that the refractory material falls into the dry quenching furnace due to abrasion or impact of coke is solved, and the usability of the dry quenching furnace is improved. The reinforcing rib plate is arranged in the refractory material of the outlet part, so that the reinforcing rib plate has a reinforcing effect, but the expansion coefficient is greatly different from that of the refractory material, and the refractory material is easy to deform and crack at high temperature.
From the literature search: the coke tank is mainly made of heat-resistant cast iron and heat-resistant alloy, and a refractory material pouring lining is reported, but the composite lining plate is only reinforced by a stainless steel rib plate, and the problem of lining plate material peeling caused by unmatched expansion coefficients exists. Therefore, a more practical coke tank composite lining plate needs to be developed to meet the production requirements.
Disclosure of Invention
Aiming at the defects of easy damage, falling off, large heat transfer, complex castable construction, easy cracking and the like of the prior art of the prior coke dry quenching coke tank lining plate, the invention provides the composite lining plate for splicing the coke tank and the preparation method thereof, wherein the service life of the coke tank lining plate can be prolonged by changing the structure of the coke tank without increasing the manufacturing cost, and the replacement period is prolonged to at least 12 months from original one year or less, so that the maintenance cost can be reduced by at least 20%.
Measures for achieving the above object:
A compound welt for concatenation coke drum comprises metal casing, anchor assembly and pouring bed of material of metal casing inner wall, and it is characterized in that: the metal shell is composed of at least two fans; on the anchoring piece of each metal shell, the anchoring piece is connected with the metal net layer; a buffer layer is coated on the anchoring piece and the metal net layer; an insulation board is arranged between the metal shell and the castable layer, and the anchoring piece penetrates through the insulation board to be connected with the metal shell; the upper and lower ends of the outer surface of each metal shell are respectively provided with a first connecting piece or a second connecting piece; the first connecting piece and the second connecting piece are connected in a matched mode.
The method comprises the following steps: the thickness of the metal shell is 5-10 mm, and the temperature resistance of the metal shell is not lower than 1000 ℃.
The method comprises the following steps: the anchor has a diameter of no more than 10mm.
The method comprises the following steps: 55% -70% of the material in the castable is formed by mixing microporous mullite aggregate or microporous andalusite aggregate with the granularity of 2-8 mm or both of the microporous mullite aggregate and the microporous andalusite aggregate in any proportion, the volume density of the microporous mullite aggregate or the microporous andalusite aggregate is 2.60-3.2 g/cm < 3 >, and the apparent porosity is 3-8%.
The method comprises the following steps: the buffer layer is an organic material with a melting point not higher than 120 ℃; the thickness of the buffer layer is not more than 1mm.
The method comprises the following steps: the diameter of the metal wires of the metal mesh layer is not more than 5mm; the side length of the grid of the metal mesh layer is 10-20 mm.
The method comprises the following steps: the heat insulation board is fixed through a fireproof adhesive.
The method comprises the following steps: the organic material is polyethylene or polypropylene plastic.
The method comprises the following steps: the refractory adhesive is aluminum dihydrogen phosphate solution.
The preparation method comprises the following steps:
1) After the die is set, a metal shell is put in;
2) Welding an anchoring piece on the inner wall of the metal shell; welding a first connecting piece or a second connecting piece which are mutually matched and connected on the outer surfaces of the upper end and the lower end of the outer wall of the metal shell;
3) Fixing the metal net layer on the anchoring piece; 4) Coating a buffer layer on the metal net layer and the anchoring piece;
5) Coating a refractory adhesive in the metal shell and paving an insulation board;
6) Pouring a refractory castable layer;
7) Standing and maintaining for 24-48h;
8) Baking at 100-120 ℃ for 24-36 h;
9) Standby;
preparing the rest of lining plates of the fan-coke tank according to the steps 1) to 8);
10 When the coke tank is required to be assembled, connecting a first connecting piece or a second connecting piece at the upper end between two adjacent pieces of the lining plate of each composite coke tank in a matched manner; and similarly, connecting the first connecting piece or the second connecting piece at the lower end between two adjacent pieces of the lining plate of each composite coke tank in a matched manner.
Function of the main component in the invention
The metal net layer is connected to the anchoring piece, so that the supporting and strengthening of the anchoring piece are realized in the radial direction of the castable, cracking and peeling of the castable are prevented, and the strength and thermal damage resistance of the castable can be strengthened through the metal net layer in the circumferential direction.
The buffer layer is coated on the anchoring piece and the metal net layer, and the expansion coefficient of the metal anchoring piece is large, and the expansion coefficient of the castable is small, so that an expansion joint is reserved, and the castable is prevented from cracking due to abnormal expansion in the heating use process. The buffer layer does not absorb water in the casting material forming process, can be formed, is soft-melt contracted in the heating process, and is beneficial to digestion expansion amount due to expansion gaps reserved in high-temperature carbonization.
According to the invention, the refractory adhesive is coated in the metal shell and the insulation board is paved, so that the casting material layer cannot be too thick due to the limitation of the weight and the volume of the tank, so that the heat conduction is too large, the surface temperature of the metal shell can be increased, the deformation is caused, and the heat loss is also caused; by adopting the nanoscale heat-insulating plate, only the heat-insulating plate with the thickness not larger than 8mm is needed, the surface temperature of the metal shell can be reduced, and the temperature is in a safety range below 200 ℃.
Compared with the prior art, the service life of the coke tank lining plate can be prolonged by changing the structure and the materials of the coke tank lining plate on the premise of not increasing the manufacturing cost, and the replacement period is prolonged from original 6-12 months to at least 12 months, so that the maintenance cost can be reduced by at least 20%.
Drawings
FIG. 1 is a schematic view of a composite liner for a spliced coke drum of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
In the figure: 1-metal shell, 2-anchoring piece, 3-pouring material layer, 4-metal net layer, 5-buffer layer, 6-heat insulation board, 7-first connecting piece and 8-second connecting piece.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
A composite lining board for splicing coke cans consists of a metal shell 1, an anchoring piece 2 connected with the inner wall of the metal shell 1 and a castable layer 3, wherein the metal shell 1 consists of at least two fans; a metal net layer 4 is connected or spot welded between the anchoring piece 2 and the anchoring piece 2 of each metal shell 1, and a buffer layer 5 is coated on the anchoring piece 2 and the metal net 4 layer; an insulation board 6 is fixed between the inner wall of the metal shell 1 and the castable layer 3 through a refractory adhesive, and the anchoring piece 2 passes through the insulation board 6 to be connected with the metal shell 1; the upper and lower ends of the outer surface of each metal shell 1 are welded or bolted with a first connecting piece 7 or a second connecting piece 8; the first connecting piece 7 and the second connecting piece 8 are in matched connection.
The metal shell 1 is made of alloy steel, the thickness of the alloy steel is 4mm/5mm/6mm, and the temperature resistance of the alloy steel is not lower than 1005 ℃/1125 ℃/1150 ℃.
The diameter of the anchor 2 is 5mm/8mm/10mm.
The castable layer 3 is formed by mixing microporous heavy mullite or andalusite with granularity of 2-8 mm or both of the microporous mullite and the andalusite according to any proportion, the density of the castable layer is 2.60 cm 3/2.85 cm3/3.20cm3, and the apparent porosity is 3%/5%/8%.
An organic material having a melting point of 116 ℃/88 ℃/105 ℃/of the buffer layer 5, or polyethylene or polypropylene; the thickness of the buffer layer was 0.83mm/0.92mm/1mm.
The diameter of the metal wires of the metal mesh layer 4 is 3mm/4.2mm/5mm; the mesh side length of the metal mesh layer 4 is within any value of 8-20 mm.
The preparation method comprises the following steps:
1) After the die is set, a fan of metal shell 1 is put in;
2) Welding the anchoring piece 2 on the inner wall of the metal shell 1; the outer surfaces of the upper end and the lower end of the outer wall of the metal shell 1 are welded with a first connecting piece 7 or a second connecting piece 8 which are mutually matched and connected;
3) Coating a refractory adhesive on the inner wall 1 of the metal shell, paving an insulation board 6 and fixing;
4) Fixing the metal net layer on the anchoring piece;
5) Coating a buffer layer 5 on the metal net layer and the anchoring piece;
6) Pouring a refractory castable layer 3;
7) Standing and maintaining for 24-48h;
8) Baking at 100 ℃/112 ℃/120 ℃ for 29.5h/36h/24h;
9) Standby;
preparing the rest of lining plates of the fan-coke tank according to the steps 1) to 8);
10 When the coke tank is assembled, the first connecting piece 7 or the second connecting piece 8 at the upper end between two adjacent pieces of the lining board of each composite coke tank are mutually matched and connected.
Through test, three coke cans which are respectively tested at present and spliced by the composite lining plate are tested for 10 months, 13 months and 16 months correspondingly, and the coke cans which are tested for 10 months and 13 months are not damaged, fall off and crack, and at least 3.5 months can be tested according to the conditions; the coke tank for 16 months is tried, local small amount of damage and falling off occur, and the coke tank can be continuously applied for 1-3 months after repairing according to the situation.
The specific embodiments are to be considered in a descriptive sense only and not for purposes of limitation.
Claims (7)
1. A compound welt for concatenation coke drum comprises metal casing, anchor assembly and pouring bed of material of metal casing inner wall, its characterized in that: the metal shell is composed of at least two fans; on the anchoring piece of each metal shell, the anchoring piece is connected with the metal net layer; a buffer layer is coated on the anchoring piece and the metal net layer; an insulation board is arranged between the metal shell and the castable layer, and the anchoring piece penetrates through the insulation board to be connected with the metal shell; the upper and lower ends of the outer surface of each metal shell are respectively provided with a first connecting piece or a second connecting piece; the first connecting piece and the second connecting piece are connected in a matched manner;
55% -70% of materials in the castable are formed by mixing mullite aggregate containing micropores or andalusite aggregate containing micropores or both of which the granularity is 2-8 mm according to any proportion, the volume density of the mullite aggregate containing micropores or andalusite aggregate containing micropores is 2.60-3.2 g/cm 3, and the apparent porosity is 3-8%;
the buffer layer is an organic material with a melting point not higher than 120 ℃; the thickness of the buffer layer is not more than 1mm;
the organic material is polyethylene or polypropylene plastic.
2. A composite liner for a spliced coke drum as in claim 1, wherein: the thickness of the metal shell is 5-10 mm, and the temperature resistance of the metal shell is not lower than 1000 ℃.
3. A composite liner for a spliced coke drum as in claim 1, wherein: the anchor has a diameter of no more than 10mm.
4. A composite liner for a spliced coke drum as in claim 1, wherein: the diameter of the metal wires of the metal mesh layer is not more than 5mm; the side length of the grid of the metal mesh layer is 10-20 mm.
5. A composite liner for a spliced coke drum as in claim 1, wherein: the heat insulation board is fixed through a fireproof adhesive.
6. A composite liner for a spliced coke drum as in claim 5, wherein: the refractory adhesive is aluminum dihydrogen phosphate solution.
7. A method of making a composite liner for a spliced coke drum as in claim 1, wherein:
1) After the die is set, a metal shell is put in;
2) Welding an anchoring piece on the inner wall of the metal shell; welding a first connecting piece or a second connecting piece which are mutually matched and connected on the outer surfaces of the upper end and the lower end of the outer wall of the metal shell;
3) Fixing the metal net layer on the anchoring piece;
4) Coating a buffer layer on the metal net layer and the anchoring piece;
5) Coating a refractory adhesive on the inner wall of the metal shell and paving an insulation board;
6) Pouring a refractory castable layer;
7) Standing and maintaining for 24-48h;
8) Baking at 100-120 ℃ for 24-36 h;
9) Standby;
preparing the rest of lining plates of the fan-coke tank according to the steps 1) to 8);
10 When the coke tank is required to be assembled, the first connecting piece and the second connecting piece at the upper end between two adjacent pieces of the lining plate of each composite coke tank are mutually matched and connected; and similarly, the first connecting piece and the second connecting piece at the lower end between two adjacent pieces of the lining plate of each composite coke tank are mutually matched and connected.
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| CN112876198B (en) * | 2021-03-31 | 2022-02-18 | 武汉钢铁有限公司 | Coating for baking-free coke tank lining plate and using method thereof |
| CN112979330B (en) * | 2021-03-31 | 2022-03-01 | 武汉钢铁有限公司 | Carbon deposition prevention coating material for coke pot lining plate and use method |
| CN114621776B (en) * | 2022-03-24 | 2023-05-16 | 武汉钢铁有限公司 | Coke tank bottom gate lining plate compounded with high-temperature ceramic piece and preparation method |
| CN115057694B (en) * | 2022-07-08 | 2023-03-14 | 河南正杰新材料科技有限公司 | Corundum-mullite castable for sintering machine air box and precast block prepared from corundum-mullite castable |
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| CN212375223U (en) * | 2020-06-17 | 2021-01-19 | 武汉钢铁有限公司 | Composite lining plate for splicing coke tanks |
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| CN203419872U (en) * | 2013-08-22 | 2014-02-05 | 昆山思创耐火材料有限公司 | Anchoring brick for primary dust removing arch crown of coke dry quenching furnace |
| CN209854057U (en) * | 2019-02-12 | 2019-12-27 | 柳州运嘉科技有限公司 | Novel dry coke quenching tank composite lining plate and tank body thereof |
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