CN114669733A - Method for building long-life ladle nozzle - Google Patents
Method for building long-life ladle nozzle Download PDFInfo
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- CN114669733A CN114669733A CN202210359836.5A CN202210359836A CN114669733A CN 114669733 A CN114669733 A CN 114669733A CN 202210359836 A CN202210359836 A CN 202210359836A CN 114669733 A CN114669733 A CN 114669733A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 62
- 239000002184 metal Substances 0.000 claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 claims abstract description 58
- 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 abstract description 28
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052849 andalusite Inorganic materials 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 20
- 230000035939 shock Effects 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 11
- 229910052742 iron Inorganic materials 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000007306 turnover Effects 0.000 abstract description 7
- 230000008595 infiltration Effects 0.000 abstract description 6
- 238000001764 infiltration Methods 0.000 abstract description 6
- 238000005266 casting Methods 0.000 description 24
- 239000011159 matrix material Substances 0.000 description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 229910052593 corundum Inorganic materials 0.000 description 8
- 239000011148 porous material Substances 0.000 description 8
- 239000010431 corundum Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000005350 fused silica glass Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
- B22D41/023—Apparatus used for making or repairing linings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
- B22D41/05—Tea-pot spout ladles
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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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/185—Mullite 3Al2O3-2SiO2
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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
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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
- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- 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
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- 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
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- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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- 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
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- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method for building a long-life hot-metal bottle nozzle, and belongs to the technical field of hot-metal bottle nozzles. The invention comprises the following steps: pouring a pouring material to mold a nozzle 110 of the hot metal ladle 100, and embedding a steel core reinforcing member in the pouring material, wherein the pouring material comprises the following materials in parts by weight: bauxite: 30-40 parts of mullite: 30-50 parts of silicon powder: 5-10 parts of andalusite: 10-20 parts of explosion-proof fiber: 2-4 parts; naturally drying for 24-30 h and then baking; baking for 12-24 h with small fire, then baking for 12h with medium fire, and then baking for 6h with big fire. In order to solve the problems in the prior art, the invention provides the method for repairing the nozzle of the long-life hot-metal ladle, which can obviously improve the thermal shock resistance of the nozzle, has no iron infiltration condition in the use process, greatly reduces the maintenance frequency of the nozzle of the hot-metal ladle and the labor intensity of workers, and effectively improves the turnover rate and the safety and reliability of the hot-metal ladle.
Description
Technical Field
The invention relates to the technical field of hot-metal bottle nozzles, in particular to a method for building a long-service-life hot-metal bottle nozzle.
Background
The hot metal ladle is placed on a hot metal car and is suitable for a container for receiving and transporting hot metal between a blast furnace and a converter. The quality of the service performance of the hot-metal bottle mouth is determined by the important component of the hot-metal bottle. Traditional hot metal bottle jar mouth adopts the firebrick to build, and jar mouth glutinous sediment is serious in the use to KR desulfurization technology is taken off the sediment process and is easily not hard up firebrick, and the molten iron loses in the clearance department of firebrick easily, causes molten iron jar mouth bulk damage, and the damage is great to flow nozzle brick and slag line brick. The turnover rate is not improved, and the maintenance cost is increased and the operation safety risk is caused. Running the tank substantially on-line for about 20 cans requires the take-off line to clean the nozzle of the tank from slime.
Aiming at the condition that the nozzle is mainly made of refractory bricks, the refractory bricks can be loosened in the process of seam erosion and slag removal, scientific research workers and enterprises adopt a method of pouring materials of the integral hot-metal ladle nozzle, firstly, the bauxite pouring materials are used, the service life of the nozzle is obviously prolonged, along with further optimization of the materials, the service life of the nozzle poured by the corundum pouring materials is as long as about 150-200 times, but the defects still exist, and the safety and the stability of production are seriously influenced due to the phenomenon that the integral falling of the pouring materials is caused because the thermal shock resistance of the corundum pouring materials is poor.
Through search, the technology of the molten iron desulphurization method is disclosed in the patent documents, such as Chinese patent publications: CN101020610A discloses a pouring material of a hot metal ladle, a pouring process and a special die, and particularly relates to a pouring material made of special-grade alumina clinker and sub-white corundum、Al2O3The formed casting material is used for casting and molding the bottom of the hot metal ladle. The method improves the high-temperature performance of the casting material of the hot-metal ladle to a certain extent. But still has the defects that the service time of the hot metal ladle is greatly shortened due to the poor thermal shock stability of the castable.
Also as in the document "Al2O3The integral casting technology of the-SiC-C hot metal ladle, Zhang Yu, Wei Shen just and saddle steel technology, No. 1 st 38-40 of 2004, introduces a method for building a permanent layer of the hot metal ladle by adopting light high-alumina bricks and casting the hot metal ladle. The method can prolong the service life of the hot-metal ladle to a certain extent. But still have the disadvantages: al (Al)2O3the-SiC-C castable is high in cost and can cause serious pollution in the production process after being used for a long time. .
Disclosure of Invention
1. Technical problem to be solved by the invention
In order to solve the problems in the prior art, the invention provides the method for repairing the nozzle of the long-life hot-metal ladle, which can obviously improve the thermal shock resistance of the nozzle, has no iron infiltration condition in the use process, greatly reduces the maintenance frequency of the nozzle of the hot-metal ladle and the labor intensity of workers, and effectively improves the turnover rate and the safety and reliability of the hot-metal ladle.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention discloses a method for repairing a long-service-life ladle nozzle, which comprises the following steps:
(1) pouring a pouring material to mold a nozzle 110 of the hot metal ladle 100, and embedding a steel core reinforcing member in the pouring material, wherein the pouring material comprises the following materials in parts by weight: bauxite: 30-40 parts of mullite: 30-50 parts of silicon powder: 5-10 parts of andalusite: 10-20 parts of explosion-proof fiber: 2-4 parts;
(2) naturally drying for 24-30 h;
(3) baking: baking for 12-24 h with small fire, then baking for 12h with medium fire, and then baking for 6h with big fire.
Preferably, the particle size of the castable material consists of 5-8 mm, 5-3 mm, 3-1 mm, 1-0.074 mm and 5 particle sizes smaller than 0.074mm, and the corresponding parts by weight of the particle sizes of 5-8 mm, 5-3 mm, 3-1 mm, 1-0.074 mm and smaller than 0.074mm are 20-27 parts, 15-20 parts, 20-23 parts, 15-20 parts and 10-17 parts in sequence.
Preferably, the grain sizes of the mullite and the bauxite are composed of four grain sizes of 5 mm-8 mm, 5 mm-3 mm, 3 mm-1 mm and 1 mm-0.074 mm, the grain size of the andalusite is composed of two grain sizes of 1 mm-0.074 mm and less than 0.074mm, and the grain size of the silicon micropowder is less than 0.074 mm.
Preferably, the length of the explosion-proof fiber is 2 mm-8 mm, and the diameter is 0.01 mm-0.03 mm.
Preferably, in the step (3), the baking is carried out for 12 to 24 hours from room temperature to 130 ℃, then the baking is carried out for 12 hours from 130 ℃ to 320 ℃, and then the baking is carried out for 6 hours from 320 ℃ to 800 ℃.
Preferably, the steel core reinforcement is a twisted steel.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) according to the method for building the long-life hot-metal ladle nozzle, the mullite castable is adopted, the thermal shock resistance of the hot-metal ladle nozzle is remarkably improved compared with that of corundum and alumina castable, the phenomenon of iron infiltration can be effectively inhibited without cracking and the like in a long-time service process, the service time of the hot-metal ladle nozzle is remarkably prolonged, the maintenance frequency of the hot-metal ladle nozzle and the labor intensity of workers are greatly reduced, and the turnover rate and the safety reliability of the hot-metal ladle are effectively improved. In addition, the mullite raw material has simple manufacturing process and low price, and does not produce environmental pollution in the preparation process.
(2) According to the method for building the long-life ladle nozzle, mullite and bauxite are used as aggregate and matrix materials to be applied to the castable, and the mullite and bauxite are mainly used as the aggregate building structure and the basic strength of the materials. The silicon micropowder can effectively fill micro pores in the matrix to further improve the density of the matrix, and in addition, under the high-temperature condition, the silicon micropowder can react with alumina in the matrix to produce mullite so as to further improve the strength and the thermal shock stability of the material. The mullite and the quartz phase are generated by decomposing the andalusite at high temperature, so that the porosity of the matrix is reduced, and the strength of the castable is improved. The explosion-proof fibre and other refractory materials are uniformly mixed, formed and then baked, and when the baking temp. is continuously raised, and reaches a certain temp., said fibre is softened, contracted and melted, and finally formed into pores and carbonized, and they are distributed in the construction body to form micro network pores, so that it can open the water-gas channel, reduce internal stress, prevent burst and prolong the service life of whole body.
(3) According to the method for repairing the long-life ladle nozzle, the steel core reinforcing member is mainly used for reinforcing in a castable material matrix and improving the normal-temperature and high-temperature mechanical strength of the material. The load borne on the nozzle of the hot-metal ladle is dispersed on the stressed twisted steel, so that the mechanical strength of the material is improved, and cracks caused by the shrinkage of the casting material, temperature change and the like can be prevented.
(4) The method for repairing the long-life hot metal ladle nozzle comprises the steps of baking for 12-24 hours from room temperature to 130 ℃, then baking for 12 hours from 130 ℃ to 320 ℃, and then baking for 6 hours from 320 ℃ to 800 ℃. The sectional type baking process is adopted to effectively inhibit the generation and the expansion of cracks on the base body, the baking system has obvious influence on the usability of materials, the thermal shock resistance of the burner can be obviously improved, no iron infiltration condition occurs in the using process, the maintenance frequency of the nozzle of the hot-metal bottle and the labor intensity of workers are greatly reduced, and the turnover rate and the safety and the reliability of the hot-metal bottle are effectively improved.
Drawings
Fig. 1 is a schematic structural view of a long-life hot-metal bottle nozzle of the present invention.
In the figure:
100. a hot metal ladle; 110. a tank mouth; 111. pouring a material; 112. steel core reinforcement.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The present invention will be further described with reference to the following examples.
Example 1
The method for repairing the long-life molten iron tank nozzle comprises the following steps:
(1) pouring and molding a nozzle 110 of the hot metal ladle 100 by using a pouring material 111, and embedding a steel core reinforcing member 112 in the pouring material, wherein the pouring material 111 comprises the following materials in parts by weight: bauxite: 30-40 parts of mullite: 30-50 parts of silicon powder: 5-10 parts of andalusite: 10-20 parts of explosion-proof fiber: 2-4 parts, specifically, bauxite in the present example: 30 parts of mullite: 35 parts of silicon powder: 10 parts of andalusite: 20 parts of explosion-proof fiber: 2 parts, firstly weighing the raw materials according to important parts, uniformly mixing, then adding 1-3 parts by mass of water, uniformly stirring, and then carrying out casting molding, wherein the water-cooling thermal shock frequency of the prepared casting material 111 is increased to 30 times.
The hot-metal ladle nozzle repairing method provided by the embodiment adopts the mullite castable 111 to remarkably improve the thermal shock resistance of the hot-metal ladle nozzle compared with the corundum castable and the alumina castable 111, so that the phenomena of iron infiltration and the like are effectively inhibited without generating cracking and the like in a long-time service process, the service time of the hot-metal ladle nozzle is remarkably prolonged, the maintenance frequency and the labor intensity of workers of the hot-metal ladle nozzle are greatly reduced, and the turnover rate and the safety and reliability of the hot-metal ladle are effectively improved. In addition, the mullite raw material has simple manufacturing process and low price, and does not produce environmental pollution in the preparation process. Mullite and bauxite are used as aggregate and matrix materials to be applied to the castable 111, and the main function of the mullite and bauxite is to serve as the basic strength of the aggregate building structure and materials. The silicon micropowder can effectively fill micro pores in the matrix to further improve the density of the matrix, and in addition, under the high-temperature condition, the silicon micropowder can react with alumina in the matrix to produce mullite so as to further improve the strength and the thermal shock stability of the material. The mullite and the quartz phase are generated by decomposing the andalusite at high temperature, so that the porosity of the matrix is reduced, and the strength of the castable is improved. The explosion-proof fibre and other refractory materials are uniformly mixed, formed and then baked, and when the baking temp. is continuously raised, and reaches a certain temp., said fibre is softened, contracted and melted, and finally formed into pores and carbonized, and they are distributed in the construction body to form micro network pores, so that it can open the water-gas channel, reduce internal stress, prevent burst and prolong the service life of whole body.
At present, most corundum materials are adopted to prepare the mouth of the hot-metal ladle, but mullite materials exist. The method for repairing the ladle nozzle of the hot metal ladle in the embodiment improves the mechanical strength and the thermal shock stability of the material on the basis of the mullite castable 111, thereby improving the service performance of the material. The proportion adopted by the embodiment is that the normal-temperature and high-temperature mechanical strength of the material is improved and the porosity of the pattern is reduced by optimizing the generation amount of mullite and a molten liquid phase in a matrix under a high-temperature condition, so that the anti-corrosion effect of the material is improved. In the embodiment, the silica powder in the casting material 111 firstly improves the fluidity of the slurry in the casting process through self-action, and secondly generates a molten liquid phase under a high-temperature condition to fill pores in the matrix; the andalusite is decomposed at a high temperature to generate mullite and a fused quartz phase, and the fused quartz phase can also fill the pores in the matrix under the self-flowing action, so that the mechanical strength and the thermal shock stability of the material at normal temperature and high temperature are improved by the generation of the mullite.
In this embodiment, the steel core reinforcement 112 is a twisted steel, and a plurality of steel core reinforcements 112 are uniformly distributed along the height direction of the hot metal ladle 100. The steel core reinforcing member 112 is mainly used for reinforcing in the matrix of the casting material 111 and improving the normal-temperature and high-temperature mechanical strength of the material. The load applied to the nozzle 110 of the hot metal ladle 100 is dispersed to the stressed twisted steel, so that the mechanical strength of the material is improved, and cracks caused by the shrinkage of the casting material 111, temperature change and the like can be prevented. The action mechanism mainly comprises:
the chemical adsorption acting force on the contact surface of the twisted steel and the casting material 111 is also called as the cementing strength.
② the casting material 111 shrinks to tightly hold the twisted steel to generate friction force.
And thirdly, the mechanical occlusion effect generated between the uneven surface of the twisted steel and the casting material is also called occlusion force.
According to the invention, the steel core reinforcing member 112 is arranged in the mullite casting material 111, so that the overall strength and fracture toughness of the casting material 111 can be obviously improved, and meanwhile, because the expansion coefficient of the twisted steel is greater than the residual stress generated by the expansion coefficient of the casting material 111, the diffusion of internal cracks of the casting material 111 can be effectively inhibited, and the overall strength and toughness of the casting material 111 can be further improved.
In the embodiment, the particle size of the castable 111 is composed of 5 particle sizes of 5mm to 8mm, 5mm to 3mm, 3mm to 1mm, 1mm to 0.074mm and less than 0.074mm, and the corresponding parts by weight of the castable with the particle sizes of 5mm to 8mm, 5mm to 3mm, 3mm to 1mm, 1 to 0.074mm and less than 0.074mm are 20 to 27 parts, 15 to 20 parts, 20 to 23 parts, 15 to 20 parts and 10 to 17 parts in sequence. Specifically, in this embodiment, the weight parts corresponding to the particle sizes of 5mm to 8mm, 5mm to 3mm, 3mm to 1mm, 1 to 0.074mm and less than 0.074mm are 27 parts, 18 parts, 23 parts, 15 parts and 17 parts in sequence.
In the embodiment, the grain sizes of mullite and bauxite are composed of four grain sizes of 5 mm-8 mm, 5 mm-3 mm, 3 mm-1 mm and 1 mm-0.074 mm, the grain size of andalusite is composed of two grain sizes of 1 mm-0.074 mm and less than 0.074mm, and the grain size of silicon micropowder is less than 0.074 mm. The length of the explosion-proof fiber is 2 mm-8 mm, and the diameter is 0.01 mm-0.03 mm. Specifically, the length of the explosion-proof fiber in the embodiment is 2mm, and the diameter is 0.02 mm.
(2) Naturally drying for 24-30 h;
(3) baking: the baking is carried out for 12h to 24h by small fire, then for 12h by medium fire, and then for 6h by large fire, specifically, in the embodiment, the baking is carried out for 12h to 24h from room temperature to 130 ℃, then for 12h from 130 ℃ to 320 ℃, and then for 6h from 320 ℃ to 800 ℃. The sectional type baking process is adopted to effectively inhibit the generation and the expansion of cracks on the base body, the baking system has obvious influence on the usability of materials, the thermal shock resistance of the burner can be obviously improved, no iron infiltration condition occurs in the using process, the maintenance frequency of the nozzle of the hot-metal bottle and the labor intensity of workers are greatly reduced, and the turnover rate and the safety and the reliability of the hot-metal bottle are effectively improved.
Example 2
The basic steps of the method for repairing a nozzle of a long-life hot-metal ladle in this embodiment are the same as those described in embodiment 1, except that the bauxite in this embodiment: 40 parts, mullite: 30 parts of silicon micropowder: 5 parts of andalusite: 18 parts of explosion-proof fiber: 3 parts, firstly weighing the raw materials according to important parts, uniformly mixing, then adding 1-3 parts by mass of water, uniformly stirring, and then carrying out casting molding, wherein the water-cooling thermal shock frequency of the prepared casting material 111 is increased to 38 times.
In the embodiment, the corresponding parts by weight of the particles with the particle diameters of 5 mm-8 mm, 5 mm-3 mm, 3 mm-1 mm, 1-0.074 mm and less than 0.074mm are 25 parts, 20 parts, 21 parts, 16 parts and 13 parts in sequence.
The length of the explosion-proof fiber in the embodiment is 6mm, and the diameter is 0.01 mm.
Example 3
The basic steps of the method for repairing a nozzle of a long-life hot-metal ladle in this embodiment are the same as those described in embodiment 1, except that the bauxite in this embodiment: 30 parts of mullite: 35 parts of silicon powder: 10 parts of andalusite: 20 parts of explosion-proof fiber: 2 parts, firstly weighing the raw materials according to important parts, uniformly mixing, then adding 1-3 parts by mass of water, uniformly stirring, and then carrying out casting molding, wherein the water-cooling thermal shock frequency of the prepared casting material 111 is increased to 35 times.
In the embodiment, the corresponding parts by weight of the particles with the particle diameters of 5 mm-8 mm, 5 mm-3 mm, 3 mm-1 mm, 1-0.074 mm and less than 0.074mm are 20 parts, 15 parts, 20 parts and 10 parts in sequence.
The length of the explosion-proof fiber in the embodiment is 8mm, and the diameter is 0.03 mm.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (6)
1. A method for repairing a long-life ladle nozzle is characterized by comprising the following steps: the method comprises the following steps:
(1) pouring and molding the nozzle 110 of the hot metal ladle 100 by using a pouring material (111), and internally arranging a steel core reinforcing member (112) in the pouring material (111), wherein the pouring material (111) comprises the following materials in parts by weight: bauxite: 30-40 parts of mullite: 30-50 parts of silicon powder: 5-10 parts of andalusite: 10-20 parts of explosion-proof fiber: 2-4 parts;
(2) naturally drying for 24-30 h;
(3) baking: baking for 12-24 h with small fire, then baking for 12h with medium fire, and baking for 6h with big fire.
2. The method for repairing a nozzle of a long-life hot-metal ladle according to claim 1, wherein: the particle size of the castable (111) material is composed of 5-8 mm, 5-3 mm, 3-1 mm, 1-0.074 mm and 5 particle sizes smaller than 0.074mm, and the corresponding weight parts of the 5-8 mm, 5-3 mm, 3-1 mm, 1-0.074 mm and smaller than 0.074mm are 20-27 parts, 15-20 parts, 20-23 parts, 15-20 parts and 10-17 parts in sequence.
3. The method for repairing a nozzle of a long-life hot-metal ladle according to claim 2, wherein: the grain sizes of the mullite and the bauxite are composed of four grain sizes of 5 mm-8 mm, 5 mm-3 mm, 3 mm-1 mm and 1 mm-0.074 mm, the grain size of the andalusite is composed of two grain sizes of 1 mm-0.074 mm and less than 0.074mm, and the grain size of the silicon micropowder is less than 0.074 mm.
4. The method for repairing a nozzle of a long-life hot-metal ladle according to claim 3, wherein: the length of the explosion-proof fiber is 2 mm-8 mm, and the diameter is 0.01 mm-0.03 mm.
5. A method of repairing a long-life hot-metal ladle nozzle as claimed in any one of claims 1 to 4, wherein: in the step (3), the baking is carried out for 12 to 24 hours from the room temperature to 130 ℃, then the baking is carried out for 12 hours from 130 ℃ to 320 ℃, and then the baking is carried out for 6 hours from 320 ℃ to 800 ℃.
6. The method for repairing a nozzle of a long-life hot-metal ladle according to claim 5, wherein: the built-in steel core reinforcement (112) is a twisted steel.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101407851A (en) * | 2008-11-28 | 2009-04-15 | 莱芜钢铁股份有限公司 | Side hot metal charging chute inner lining of hot-metal mixer and manufacturing method thereof |
| CN104209502A (en) * | 2014-09-01 | 2014-12-17 | 武汉钢铁(集团)公司 | Torpedo ladle car opening castable |
| CN107096913A (en) * | 2017-05-25 | 2017-08-29 | 武汉钢铁有限公司 | Hot-metal bottle dry slag cut off device and preparation method |
| CN107344860A (en) * | 2017-07-18 | 2017-11-14 | 攀枝花市昌宁冶金材料有限责任公司 | Mould material and pouring procedure for hot-metal bottle |
| CN108033799A (en) * | 2017-12-14 | 2018-05-15 | 钢城集团凉山瑞海实业有限公司 | Half cylinder of steel tank mouth castable |
| CN108033795A (en) * | 2017-11-23 | 2018-05-15 | 武汉钢铁集团耐火材料有限责任公司 | High alumina castable for fish torpedo ladle permanent layer |
| CN109608211A (en) * | 2018-12-21 | 2019-04-12 | 武汉钢铁集团耐火材料有限责任公司 | Hot-metal bottle aluminium silicon carbide castable and preparation method thereof |
-
2022
- 2022-04-07 CN CN202210359836.5A patent/CN114669733B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101407851A (en) * | 2008-11-28 | 2009-04-15 | 莱芜钢铁股份有限公司 | Side hot metal charging chute inner lining of hot-metal mixer and manufacturing method thereof |
| CN104209502A (en) * | 2014-09-01 | 2014-12-17 | 武汉钢铁(集团)公司 | Torpedo ladle car opening castable |
| CN107096913A (en) * | 2017-05-25 | 2017-08-29 | 武汉钢铁有限公司 | Hot-metal bottle dry slag cut off device and preparation method |
| CN107344860A (en) * | 2017-07-18 | 2017-11-14 | 攀枝花市昌宁冶金材料有限责任公司 | Mould material and pouring procedure for hot-metal bottle |
| CN108033795A (en) * | 2017-11-23 | 2018-05-15 | 武汉钢铁集团耐火材料有限责任公司 | High alumina castable for fish torpedo ladle permanent layer |
| CN108033799A (en) * | 2017-12-14 | 2018-05-15 | 钢城集团凉山瑞海实业有限公司 | Half cylinder of steel tank mouth castable |
| CN109608211A (en) * | 2018-12-21 | 2019-04-12 | 武汉钢铁集团耐火材料有限责任公司 | Hot-metal bottle aluminium silicon carbide castable and preparation method thereof |
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