CN114105659B - Nano Al 2 O 3 -SiC composite powder, low-carbon pouring ladle slide plate brick and preparation method thereof - Google Patents

Nano Al 2 O 3 -SiC composite powder, low-carbon pouring ladle slide plate brick and preparation method thereof Download PDF

Info

Publication number
CN114105659B
CN114105659B CN202111611715.7A CN202111611715A CN114105659B CN 114105659 B CN114105659 B CN 114105659B CN 202111611715 A CN202111611715 A CN 202111611715A CN 114105659 B CN114105659 B CN 114105659B
Authority
CN
China
Prior art keywords
fine powder
plate brick
sic
nano
mixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111611715.7A
Other languages
Chinese (zh)
Other versions
CN114105659A (en
Inventor
周亮
徐昆波
方岩震
余西平
赵锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maanshan Lier Kaiyuan New Material Co ltd
Original Assignee
Maanshan Lier Kaiyuan New Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maanshan Lier Kaiyuan New Material Co ltd filed Critical Maanshan Lier Kaiyuan New Material Co ltd
Priority to CN202111611715.7A priority Critical patent/CN114105659B/en
Publication of CN114105659A publication Critical patent/CN114105659A/en
Application granted granted Critical
Publication of CN114105659B publication Critical patent/CN114105659B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
    • 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
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • 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
    • C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
    • 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
    • C04B2235/38—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
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • C04B2235/9615—Linear firing shrinkage

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a nano Al 2 O 3 -SiC composite powder, a low-carbon pouring ladle slide plate brick and a preparation method thereof, belonging to the technical field of refractory materials for ladles. The nano Al 2 O 3 the-SiC composite powder is prepared by a gas phase method, Al 2 O 3 Uniformly dispersed on the surface of SiC fine powder, Al 2 O 3 D50 ═ 13 nm; the low-carbon poured sliding plate brick for steel ladle is added with the prepared nano Al 2 O 3 the-SiC composite powder is prepared by adopting the processes of multiple dispersion, pouring, multi-stage curing, asphalt impregnation and dry distillation carbonization, the prepared slide brick has high volume density and strength, good high-temperature sintering property, good thermal shock stability and good molten steel and steel slag corrosion resistance, and the service life of the slide brick is prolonged.

Description

Nano Al 2 O 3 -SiC composite powder, low-carbon pouring steel ladle slide plate brick and preparation methods thereof
Technical Field
The invention belongs to the technical field of refractory materials for ladles, and particularly relates to nano Al 2 O 3 -SiC composite powder, a low-carbon pouring ladle slide plate brick and a preparation method thereof.
Background
With the continuous development of steel-making technology, the flow control system in the die casting or continuous casting steel casting process basically adopts a sliding gate flow control system to replace a stopper rod flow control system. The slide plate is used as the most important component part in a sliding nozzle system, the flow of molten steel is directly controlled, and under the condition of meeting different casting process requirements, the slide plate needs to repeatedly bear the chemical erosion and physical scouring of high-temperature molten steel for a long time and simultaneously bears high thermal shock and mechanical abrasion, and the service environment is extremely harsh. The sliding plate brick used at present is basically made of Al 2 O 3 -C system or Al 2 O 3 -ZrO 2 a-C system, which adopts alumina corundum, zirconia mullite, graphite and the like as main raw materials, mixes the raw materials by taking liquid phenolic resin as a binding agent, and then mixes the raw materials in an electric spiralOr high-pressure forming into green bricks on a hydraulic press, and then sintering at high temperature to obtain the finished product; the sliding plate brick produced by the process has a longer flow, needs to be produced under the high-pressure/high-temperature condition, and simultaneously adopts graphite as a carbon source, and more carbon needs to be added, so that the sliding plate brick can be ensured to have certain thermal vibration stability; along with the requirements of smelting of steel of varieties such as clean steel and the like, the influence of refractory materials on molten steel recarburization is required to be reduced as much as possible, so that the sliding plate brick is required to have lower carbon content; meanwhile, under the situation that a steel mill greatly promotes green steel making and intelligent steel making, higher requirements are put forward on the use safety, stability and service life of the sliding plate brick used in continuous casting.
Through search, the patent publication number is CN102964138A, the publication date is 3 and 13 months in 2013, and the patent name is light Al 2 O 3 -SiC-C refractory castable and a preparation method thereof. The refractory castable is prepared by taking 40-55 wt% of porous corundum particles, 8-12 wt% of corundum particles, 6-12 wt% of SiC particles, 6-10 wt% of SiC fine powder, 5-8 wt% of corundum fine powder, 8-12 wt% of active alumina micro powder, 3-5 wt% of calcium aluminate cement, 2-4 wt% of silicon oxide micro powder, 2-4 wt% of spherical asphalt, 1.5-2.0 wt% of silicon powder, 0.1-0.3 wt% of aluminum powder and 0.1-0.3 wt% of boron carbide powder as raw materials, adding 8-15 wt% of water, 0.2-0.6 wt% of water reducing agent and 0.02-0.04 wt% of organic explosion-proof fiber as the raw materials, stirring, casting and molding, naturally drying, and drying for 12-48 hours at 110 ℃ to obtain the lightweight Al 2 O 3 -SiC-C refractory castable. The method has the defects that spherical asphalt is used as a carbon source, the direct dispersion and bonding property with binding agent water is poor, C in the casting material cannot be uniformly dispersed between a matrix and a framework, and the erosion resistance and the thermal shock stability of the material are influenced; meanwhile, the porous light refractory castable prepared by the method is suitable for an insulating layer and cannot be directly used for a working layer contacting molten steel. The patent publication No. CN111620706A, published as 2020, 9, month and 4, discloses Al for a modified carbon source optimized blast furnace tapping channel 2 O 3 The refractory pouring material is prepared from brown fused alumina aggregate 55.0-65.0 wt%, silicon carbide 17.0-25.0 wt%, and 8.0E15.0 wt% of active alpha-alumina micro powder, 4.0-6.0 wt% of hydratable alumina, 1.5-2.0 wt% of metal aluminum powder/elemental silicon powder compound antioxidant and 1.5-2.0 wt% of modified carbon source @ nano silicon dioxide composite additive are used as raw materials; the Al for the modified carbon source optimized blast furnace tapping channel is prepared by mixing the raw materials and the weight percentage thereof and adding 0.15-0.25 wt% of water reducing agent of the raw materials 2 O 3 The refractory castable material of-SiC-C has the disadvantages that the refractory castable material cannot be effectively and uniformly dispersed in a castable system after nano silicon dioxide is introduced, and a carbon source introduced by a plant debris combustion mode easily generates some impurity components, so that the erosion resistance of the material is influenced.
In addition, the patent publication No. CN107815625A, publication date 3/2018/20, discloses a SiC continuous fiber reinforced titanium-based composite material, which takes SiC continuous fibers as a base material, and Al is formed by magnetron sputtering 2 O 3 Sputtering on the surface of SiC continuous fiber to obtain the coated Al 2 O 3 Coated SiC continuous fiber, but the composite material prepared by the method is easy to generate segregation and Al 2 O 3 The coating is not uniform.
Disclosure of Invention
1. Problems to be solved
Aiming at the existing Al 2 O 3 Al in sliding brick of-SiC system 2 O 3 The invention provides nano Al which is difficult to be uniformly mixed with SiC 2 O 3 -SiC composite powder and preparation method thereof, and nano Al prepared by gas phase method 2 O 3 And composite powder uniformly dispersed on the surface of the SiC fine powder.
The invention provides a low-carbon pouring ladle slide plate brick and a preparation method thereof, and the prepared nano Al is added 2 O 3 The sliding brick prepared from the-SiC composite powder has high volume density and strength, good high-temperature sintering property, good thermal shock stability and good molten steel and steel slag corrosion resistance, and the service life of the sliding brick is prolonged.
2. Technical scheme
In order to solve the problems, the technical scheme adopted by the invention is as follows:
nano Al 2 O 3 -SiC composite powder of said Al 2 O 3 Uniformly dispersed on the surface of SiC fine powder, Al 2 O 3 D50 ═ 13nm, BET specific surface area 100. + -.15 m 2 /g，Al 2 O 3 The content is more than or equal to 99.5 percent, and the pH value is 5-6. The weakly acidic environment can lead the nano Al 2 O 3 A certain electrostatic repulsion force is obtained by a small number of medium-sized particles with positive charges, so that the secondary aggregation of the nano particles after gas phase high-speed dispersion is avoided, and the uniformity and stability of the composite powder are improved.
Further, the Al 2 O 3 The weight ratio of the SiC fine powder to the SiC fine powder is (20-40%): (60% to 80%) of the above Al 2 O 3 The sum of the weight proportion of the fine powder and the SiC powder is 100 percent.
Furthermore, the SiC fine powder is a mixture of black silicon carbide and green silicon carbide, and is in an alpha-SiC crystal form, wherein the mass content of the black silicon carbide is 70%, the mass content of the green silicon carbide is 30%, the SiC content in the black silicon carbide is more than or equal to 97%, the particle size is 0-0.074 mm, the SiC content in the green silicon carbide is more than or equal to 98%, the particle size is 0-0.045 mm, the surface activity of the black silicon carbide is high, and nano Al is favorably distributed on the surface of the black silicon carbide 2 O 3 The green silicon carbide has higher purity and lower impurity content, the hardness and the mechanical strength are higher, and the nano Al is favorably generated by adding the mixture of the black silicon carbide and the green silicon carbide 2 O 3 The adsorption is uniformly dispersed, and the high-temperature strength, the mechanical strength and the oxidation resistance of the sliding plate brick are improved.
The nano Al 2 O 3 the-SiC composite powder is produced by adopting a gas phase method, and the method comprises the following steps:
(1) preparing materials: mixing Al 2 O 3 Weighing the SiC fine powder according to the proportion;
(2) mixing materials: mixing the above Al 2 O 3 Putting the SiC fine powder and the high-speed airflow impact type mixer into a mixing machine for mixing, wherein preliminary mixing is carried out for 3-5 min, and the rotating speed of a main machine is 100-200 rpm; mixing materials at high speed for 20-30 min, and rotating the main machine at 800-1200 rpm; further mixing the materials for 3min, wherein the rotating speed of the main machine is more than or equal to 1200 rpm.
The invention firstly prepares nano Al 2 O 3 -SiC composite powder, compared with Al which is not prepared in the prior art 2 O 3 The agglomeration phenomenon of particles generated by premixing with SiC influences the dispersibility of the components, the Al of the invention 2 O 3 Uniformly coated on the surface of SiC fine powder, in addition, the nano Al of the invention 2 O 3 the-SiC composite powder is prepared by a gas phase method, and the nano Al is prepared by using a high-speed airflow impact mixer and utilizing the high-speed rotation of a main machine rotor and the strong impact force of the generated high-speed airflow on particles 2 O 3 After fully dispersing the particles, embedding the particles into the surface of the SiC particles and fixing the particles so that the alumina particles and the silicon carbide particles are tightly adsorbed together; meanwhile, under the action of impact force, silicon carbide particles with partial defects can be ground into spherical or nearly spherical particles, so that the compact packing performance of the composite powder is improved. Compared with the composite material prepared by magnetron sputtering by using SiC fiber as a substrate, the particles prepared by the vapor phase method have Al 2 O 3 Uniform distribution, SiC and Al in the preparation process 2 O 3 Is in a dynamic state under the impact of airflow, avoids the phenomenon of Al 2 O 3 And the density difference of SiC.
The invention also discloses a low-carbon pouring steel ladle sliding plate brick which comprises a granular material and fine powder, wherein the granular material comprises 5-10% of corundum particles with the particle size of 5-3 mm, 28-35% of corundum particles with the particle size of 3-1 mm and 20-25% of corundum particles with the particle size of 1-0 mm according to mass percentage; the fine powder comprises 10-16% of corundum fine powder with the particle size of 0-0.045 mm, 5-8% of fused magnesia fine powder with the particle size of 0-0.074 mm, and nano Al in percentage by mass 2 O 3 3 to 5 percent of-SiC composite powder and active alpha-Al 2 O 3 6-10% of micro powder, 5-8% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage of the granular material and the fine powder material is 100%; water accounting for 4 to 5 percent of the total weight is added.
The vapor phase method of the invention prepares the nanoscale Al 2 O 3 High purity, good dispersibility, high specific surface area and specific surface energy, greatly improving the pouring rateThe fluidity of the injection material promotes the high-temperature sintering property of the sliding plate brick and increases the volume density and the strength of the sliding plate brick; at the same time, nano-scale Al 2 O 3 Nanometer micropores can be generated in the casting material, so that the increase of the internal stress of the sliding plate brick caused by external force is gradually absorbed in the use process of the sliding plate brick, the sliding plate brick is prevented from cracking caused by stress extension, and the thermal shock stability of the sliding plate brick is improved; the SiC fine powder has high strength, and when the SiC fine powder is added into the sliding plate brick, the high-temperature strength and the high-temperature rupture strength of the sliding plate brick are improved, and meanwhile, the SiC fine powder and the nano Al coated on the surface of the sliding plate brick at high temperature 2 O 3 And (3) reacting, namely producing a mullite crystal body in situ, filling the mullite crystal body in nano-scale and micro-scale air holes in the sliding plate brick, and improving the compactness, the high-temperature thermal shock stability and the molten steel and steel slag erosion resistance of the sliding plate brick, thereby prolonging the service life of the sliding plate brick.
Furthermore, the corundum particles and the corundum fine powder are one or more than one of sintered plate-shaped corundum, fused white corundum and fused brown corundum; the fused white corundum and the fused brown corundum are formed by recrystallization after being melted by an electric arc furnace at the temperature of more than 2100 ℃, and the obtained corundum has good crystallinity, high wear resistance, high strength and good compactness; the plate-shaped corundum calcined at high temperature has low porosity, more closed pores, good thermal shock stability and good high-temperature chemical stability, and the corundum prepared by the two different processes is used as the aggregate of the sliding plate brick, so that the high-temperature strength, the high-temperature chemical stability and the thermal shock stability of the sliding plate brick can be improved, and the service life of the sliding plate brick can be prolonged; al of sintered plate-like corundum and fused white corundum 2 O 3 The content is more than or equal to 99.3 percent, and the content R of the alkaline oxide 2 O is less than or equal to 0.25 percent, R is K or Na, and the volume density is more than or equal to 3.55g/cm 3 (ii) a Al of fused brown corundum 2 O 3 The content is more than or equal to 95.8 percent, and TiO 2 The content is less than or equal to 3 percent, SiO 2 The content is less than or equal to 1.5 percent, and the volume density is more than or equal to 3.60g/cm 3 。
Furthermore, the MgO content of the fused magnesia fine powder is more than or equal to 98.2 percent, and the SiO content of the fused magnesia fine powder 2 The content is less than or equal to 0.9 percent, and the volume density is more than or equal to 3.50g/cm 3 。
Further, the active α -Al 2 O 3 The micro powder is high-temperature calcined bimodal Al 2 O 3 Micropowder, typical D50 bimodal 0.8 μm and 2.7 μm, Al 2 O 3 The content is more than or equal to 99 percent.
Furthermore, the composite binder is a composite of calcium aluminate cement, silicon micropowder and hydraulic alumina, and is prepared by uniformly mixing the calcium aluminate cement, the silicon micropowder and the hydraulic alumina, wherein the mass ratio of the calcium aluminate cement to the silicon micropowder to the hydraulic alumina is (1-2): (4-5): (3-4).
Further, the calcium aluminate cement is CA-80 cement, wherein Al 2 O 3 The content is more than or equal to 76.5 percent, and the content of CaO is less than or equal to 22.5 percent; SiO in the silicon micro powder 2 The content is more than or equal to 94.5 percent, and typical D50 is 0.15 mu m; the hydraulic alumina main crystal phase is rho-Al 2 O 3 ，ρ-Al 2 O 3 The content is more than or equal to 99 percent.
The low-carbon pouring ladle slide plate brick is compounded by calcium aluminate cement, silica powder and hydraulic alumina in a reasonable ratio to serve as a binding agent of the pouring slide plate brick; calcium aluminate cement with the content of about 4% is added into the corundum castable conventionally as a binding agent, the early strength of the slide plate brick is high, a hydration product continuously grows in the curing process and forms a crystal-gel three-dimensional grid structure with binding particles, and aggregate parts in the slide plate brick are connected to form certain strength; when the addition amount of the cement is higher, the high-temperature strength and the erosion resistance of the sliding plate brick are reduced by the anorthite and the anorthite with low melting points formed at the high temperature of CaO; the micron-sized silicon micropowder has obvious spherical particles, colloid particles formed in water cover the surfaces of skeleton particles, the agglomeration phenomenon among the particles is prevented, the fluidity of the castable is improved, and simultaneously, hydrated silanol groups are dehydrated and condensed to form a firm three-dimensional space network structure combined by-Si-O-Si in a maintenance stage, so that the temperature can be kept to be more than 1200 ℃, and the network structure can obviously improve the normal temperature strength and the medium temperature strength of the castable; with rho-Al 2 O 3 Hydraulic alumina with predominant crystalline phase, converted to high temperature stable phase alpha-Al at high temperature 2 O 3 And is easily reacted with SiO 2 MgO reacts in situ to generate mullite and spinel with high melting point and corrosion resistance, and furtherThe strength, slag resistance and service performance of the castable are improved, and the excessive addition of the hydraulic alumina can increase the water addition amount of the castable and influence the high-temperature strength of the sliding plate brick; the sliding plate brick prepared by reasonably combining the addition amounts of the three binding agents and selecting the CA-80 calcium aluminate cement with low CaO content has high strength and erosion resistance at low temperature, medium temperature and high temperature.
Furthermore, the water reducing agent is one or more of sodium tripolyphosphate and polyethylene glycol group, can be used alone, or can be a mixture of sodium tripolyphosphate and polyethylene glycol group, and the mass ratio of sodium tripolyphosphate to polyethylene glycol group in the mixture is 5: 5, when a mixture of sodium tripolyphosphate and polyethylene glycol groups is used as a water reducing agent, the sodium tripolyphosphate is dissociated into macromolecular anions in water and is adsorbed on the surfaces of the micro-powder particles, a diffusion double electric layer is formed on the surfaces of the particles, a flocculation structure in a system is damaged and inhibited, so that free water in the system is increased, and the fluidity of the casting material is improved; the polyethylene glycol water reducing agent containing a large amount of carboxyl, carboxylate, hydroxyl and other hydrophilic functional groups forms a thicker polymer molecule adsorption layer on the surfaces of the particles, and when the particles approach to each other and overlap with the adsorption layer, a stronger steric hindrance repulsion effect is generated, so that the fluidity of the casting material is improved; according to the invention, through the composite action of the two water reducing agents, the electrostatic repulsion effect and the steric hindrance effect of ions in the water reducing agents after being dissolved in water are reasonably utilized, the fluidity of the castable is effectively improved, and the water adding amount is reduced.
Furthermore, the explosion-proof agent is one or more than one of aluminum fibers and polypropylene fibers, can be used alone, and can also be a mixture of the aluminum fibers and the polypropylene fibers, and the mass ratio of the aluminum fibers to the polypropylene fibers in the mixture is 7: 3, when the mixture of the aluminum fiber and the polypropylene fiber is used as the explosion-proof agent, the aluminum fiber can slowly react with water to generate a certain amount of H in the processes of pouring and primary maintenance of the sliding brick, namely, the aluminum fiber, the metal aluminum atoms with the surface activity of the fiber 2 Gas is discharged, tiny pore canals are formed inside the sliding plate brick, moisture is favorably discharged, and meanwhile, the fibrous metal aluminum is uniformly distributed on the sliding plate brickIn the interior, it can react with C, N in the slide brick at high temperature to produce Al 4 C 3 Non-oxides of ceramic phases such as AlN are uniformly distributed and crossed in the material matrix, so that the strength and toughness of the material are improved, the hot impact force and the thermal stress applied to the sliding plate brick in the high-temperature use process are greatly relieved, and the high-temperature breaking strength, the thermal shock stability and the oxidation resistance of the sliding plate brick are improved; the polyethylene glycol is gradually softened, contracted and melted in the secondary maintenance process of the sliding plate brick, and finally forms air holes and is carbonized, so that tiny network air holes are formed in the sliding plate brick, a water vapor discharge channel is opened, the internal stress is relieved, and the cracking is prevented; the aluminum fiber and the polyethylene glycol fiber are used as the composite explosion-proof agent, so that the drainage performance of the sliding plate brick in the pouring process, the primary curing process and the secondary curing process can be effectively improved, the explosion-proof performance is improved, and meanwhile, the high-temperature chemical performance of the sliding plate brick can be effectively improved and the service life of the sliding plate brick is prolonged by adding the aluminum fiber.
The invention discloses a preparation method of the low-carbon pouring ladle slide plate brick, which comprises the following steps:
(1) mixing fine powder: proportionally mixing corundum fine powder with the particle size of 0-0.045 mm, fused magnesia fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder, active alpha-Al 2 O 3 Mixing the micro powder, the composite binder, the water reducing agent and the explosion-proof agent, wherein the fine powder is mixed on an inclined high-speed mixer for 40-60 min, and the rotating speed of a main machine of the mixer is more than or equal to 400 rpm;
(2) preparing granules: mixing 5-3 mm corundum particles, 3-1 mm corundum particles and 1-0 mm corundum particles according to weight percentage;
(3) mixing the casting materials: mixing and stirring the granules in the step (2), adding the fine powder mixed in the step (1), continuously mixing and grinding, adding water according to a proportion, stirring and discharging, wherein the granules are placed in a vertical shaft planetary stirrer to be dry-mixed for 3-5 min, the rotating speed of a stirrer main machine is more than or equal to 80rpm, adding the fine powder, continuously mixing and grinding for 5-8 min, adding water accounting for 4-5% of the total weight, stirring for 8-10 min, and discharging;
(4) pouring and vibration molding: pouring the mixed castable prepared in the step (3) into a mold twice, and stopping after floating slurry appears on the surface and no bubbles are generated, in the actual operation process, pouring the mixed castable prepared in the step (3) into the mold twice, fixing the mold on a vibration platform through bolts, manually pouring the castable into the mold, then opening the vibration platform, primarily vibrating for 60 seconds, closing the vibration platform, then pouring the other half of the castable, vibrating for 5-8 minutes again, and stopping after floating slurry appears on the surface and no bubbles are generated;
(5) primary maintenance: curing the pouring semi-finished product prepared in the step (4) under a natural ventilation condition, wherein the curing condition is curing for 3-4 hours, then placing the pouring semi-finished product into a constant temperature room at 35-40 ℃ for curing for 6-12 hours, and then placing the pouring semi-finished product into a constant temperature room at 60-70 ℃ for curing for 12-18 hours;
(6) secondary curing: demolding the primarily cured product, gradually removing fastening screws of the steel template, taking down a cast slide plate brick, and placing the product in a medium-low temperature kiln for secondary curing, wherein the curing temperature is 280-300 ℃, and the curing time is 24-36 hours;
(7) asphalt impregnation: performing oil immersion treatment on the semi-finished product of the sliding plate brick subjected to secondary maintenance in the step (6), wherein the treatment process is performed in a vacuum oil immersion tank, the asphalt softening point is 70-85 ℃, the temperature in the vacuum tank is 200-250 ℃, the oil immersion pressure maintaining time is more than 6 hours, and the pressure maintaining pressure is more than 2 MPa;
(8) dry distillation and carbonization: sealing the slide plate brick soaked by the asphalt in a gas kiln for dry distillation and carbonization treatment at 850-900 ℃ for 6-8 hours;
(9) finishing treatment: and (4) performing steel hoop beating, double-sided grinding, non-working surface veneering, drying and sliding surface coating treatment on the semi-finished sliding plate brick obtained after the dry distillation carbonization treatment in the step (8), and packaging after the inspection is qualified to obtain the finished sliding plate brick.
The low-carbon pouring ladle slide plate brick is prepared by adopting the processes of multiple dispersion, pouring, multi-stage curing, asphalt impregnation and dry distillation carbonization:
adopting a multiple dispersion process: firstly, nanoscale Al 2 O 3 Dispersed on the surface of SiC fine powder by a high-speed airflow impact type mixerSecondly, fully mixing all fine powder raw materials by adopting an inclined high-speed mixer, finally uniformly stirring the castable by adopting a vertical shaft type planetary mixer, and realizing closest packing of granular materials (millimeter level), fine powder (micrometer level), micro powder (submicron level) and ultrafine powder (nanometer level) with different particle sizes in the whole system through a three-time dispersion process, so that the density of the sliding plate brick is improved;
the dry distillation carbonization process after asphalt impregnation is adopted: the well-maintained sliding plate brick is subjected to an asphalt impregnation process, liquid asphalt is impregnated into open pores in the sliding plate brick at high pressure, and then a dry distillation carbonization process is carried out, so that asphalt is decomposed firstly, carbonized and coked, and finally graphitized to form a graphite-shaped carbon net structure which is filled in the pores of the sliding plate brick, and the graphite-shaped carbon net structure, a particle framework and a fine powder matrix form an integral network together, thereby greatly reducing the porosity of the sliding plate brick, improving the volume density and the strength, and meanwhile, the graphitized carbon net structure has good non-wettability with molten steel and steel slag in the use process of the sliding plate brick, and the molten steel and steel slag corrosion resistance of the sliding plate brick can be obviously improved; the carbon source introduced by pitch impregnation and carbonization is uniformly distributed in the sliding plate brick, has low residual content and good anti-corrosion effect, can avoid the defects of nonuniform dispersion, non-wetting carbon and water, easy layering and the like caused by directly introducing the carbon source into the raw materials adopted in the traditional carbon-containing castable, and prolongs the service life of the sliding plate brick.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) nano Al of the invention 2 O 3 -SiC composite powder of nano Al 2 O 3 And SiC fine powder are taken as raw materials, and the nano Al is mixed by a high-speed airflow impact type mixer 2 O 3 Fully dispersed and wrapped around SiC fine powder to improve the nano Al 2 O 3 The dispersibility of the superfine powder;
(2) the low-carbon pouring ladle slide plate brick is added with a certain amount of nano Al 2 O 3 the-SiC composite powder improves the fluidity of the casting material, promotes the high-temperature sintering property of the sliding plate brick, and increases the volume density and the strength of the sliding plate brick; nano Al 2 O 3 Nano-scale micropores are generated in the casting material, so that the internal stress of the sliding plate brick is relieved, and the thermal shock stability of the sliding plate brick is improved; the high-strength SiC fine powder improves the high-temperature strength of the sliding plate brick, and simultaneously the high temperature and the nano Al 2 O 3 The mullite crystal is produced in situ through reaction, so that the high-temperature thermal shock stability and the molten steel and steel slag corrosion resistance of the sliding plate brick are improved, and the service life is prolonged;
(3) the low-carbon pouring steel ladle sliding plate brick is beneficial to nano Al by adding the mixture of the black silicon carbide and the green silicon carbide 2 O 3 The adsorption is uniformly dispersed, and the high-temperature strength, the mechanical strength and the oxidation resistance of the sliding plate brick are improved; meanwhile, SiC is used as an antioxidant, and is superior to the reaction of carbon and oxygen at high temperature, so that the oxidation resistance of the sliding plate brick is improved;
(4) the low-carbon pouring steel ladle sliding plate brick takes high-density and high-density electric melting white corundum, electric melting brown corundum and sintered plate-shaped corundum as large-particle aggregates, so that the high-temperature strength, the high-temperature chemical stability and the thermal shock stability of the sliding plate brick are improved; simultaneously, adding a proper amount of corundum fine powder and fused magnesia fine powder, reacting at high temperature to produce a certain amount of in-situ spinel, effectively filling open pores of the sliding plate brick along with the volume increase effect, reducing the porosity of the sliding plate brick, and improving the molten steel and steel slag corrosion resistance;
(5) the low-carbon pouring ladle slide plate brick takes a complex of calcium aluminate cement, silicon micropowder and hydraulic alumina in a reasonable proportion as a binding agent of the pouring slide plate brick; by reasonably combining the addition amounts of the three bonding agents and selecting the CA-80 calcium aluminate cement with low CaO content, the prepared slide plate brick has very high strength and erosion resistance at low temperature, medium temperature and high temperature stages;
(6) according to the low-carbon pouring ladle slide plate brick, sodium tripolyphosphate and polyethylene glycol groups are used as a composite water reducing agent, and the electrostatic repulsion effect and the steric hindrance effect of ions in the water reducing agent after being dissolved in water are reasonably utilized, so that the fluidity of a pouring material is effectively improved, and the water adding amount is reduced;
(7) according to the low-carbon pouring ladle sliding plate brick, the mixture of the aluminum fibers and the polypropylene fibers is used as an explosion-proof agent, so that the drainage performance of the sliding plate brick in the pouring process, the primary curing process and the secondary curing process is effectively improved, the explosion-proof performance is improved, meanwhile, the high-temperature chemical performance of the sliding plate brick is effectively improved due to the addition of the aluminum fibers, and the service life of the sliding plate brick is prolonged;
(8) the low-carbon pouring ladle slide plate brick is added with a certain amount of high-temperature calcined bimodal active alpha-Al 2 O 3 Micro-powder, nano-and micro-scale Al 2 O 3 The micro powder can optimize the grain size distribution of the casting material, increase the stacking density of the grains, and can also be used as a filling material to occupy fine gaps among the grains, so that the water consumption of the casting material is obviously reduced, and the fluidity and the bonding strength are improved; activated alpha-Al 2 O 3 The sintering densification of the sliding plate can be promoted at high temperature, and the high-temperature strength and the erosion resistance of the product are improved;
(9) the low-carbon pouring steel ladle sliding plate brick is prepared by adopting a multiple dispersion-pouring-multi-stage curing-asphalt dipping-dry distillation carbonization process, and the density of the sliding plate brick is improved by adopting a multiple dispersion process; the method adopts a dry distillation carbonization process after asphalt impregnation to form a graphite-shaped carbon mesh structure which is filled in the air holes of the sliding plate brick, and the graphite-shaped carbon mesh structure, the particle framework and the fine powder matrix form a mesh structure, so that the porosity, the volume density and the strength of the sliding plate brick are reduced, and meanwhile, the molten steel and steel slag corrosion resistance of the sliding plate brick is improved; the carbon source introduced by pitch impregnation and carbonization is uniformly distributed in the sliding plate brick, the residual content is low, the anti-corrosion effect is good, and the service life of the sliding plate brick is prolonged.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a microscopic view of a slide plate brick of the present invention;
FIG. 2 is a photograph of a slide tile according to example 3 of the present invention before and after use;
FIG. 3 is a photograph of a slide tile of comparative example 1 of the present invention before and after use.
Detailed Description
The following detailed description of exemplary embodiments of the invention refers to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration exemplary embodiments in which the invention may be practiced. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that various changes to the invention may be made without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is presented for purposes of illustration only and not limitation to describe the features and characteristics of the invention, to set forth the best mode of carrying out the invention, and to sufficiently enable one skilled in the art to practice the invention. Accordingly, the scope of the invention is to be limited only by the following claims.
The invention is further described with reference to specific examples.
Corundum particles with a particle size of 5-3 mm, corundum particles with a particle size of 3-1 mm, corundum particles with a particle size of 1-0 mm, corundum fine powder with a particle size of 0-0.045 mm, fused magnesia fine powder with a particle size of 0-0.074 mm, and nano Al used in the following examples 2 O 3 Fine powder of SiC and active alpha-Al 2 O 3 The micro powder, the composite binder, the water reducing agent and the explosion-proof agent are all raw materials purchased in the market.
The corundum particles and the corundum fine powder are one or more than one of sintered plate-shaped corundum, fused white corundum and fused brown corundum; al of sintered plate-like corundum and fused white corundum 2 O 3 The content is more than or equal to 99.3 percent, and the content R of the alkaline oxide 2 O is less than or equal to 0.25 percent, R is K or Na, and the volume density is more than or equal to 3.55g/cm 3 (ii) a Al of fused brown corundum 2 O 3 The content is more than or equal to 95.8 percent, and TiO 2 The content is less than or equal to 3 percent, SiO 2 The content is less than or equal to 1.5 percent, and the volume density is more than or equal to 3.60g/cm 3 。
MgO content of fused magnesia fine powder is more than or equal to 98.2 percent, and SiO content 2 The content is less than or equal to 0.9 percent, and the volume density is more than or equal to 3.50g/cm 3 ；。
The active alpha-Al 2 O 3 The micro powder is high-temperature calcined bimodal Al 2 O 3 Micropowder, typical D50 bimodal 0.8 μm and 2.7 μm, Al 2 O 3 The content is more than or equal to 99 percent.
The composite binder is a composite of calcium aluminate cement, silicon micropowder and hydraulic alumina, wherein the mass ratio of the calcium aluminate cement to the silicon micropowder to the hydraulic alumina is (1-2): (4-5): (3-4).
The calcium aluminate cement is CA-80 cement, wherein Al is 2 O 3 The content is more than or equal to 76.5 percent, and the content of CaO is less than or equal to 22.5 percent; SiO in the silicon micro powder 2 The content is more than or equal to 94.5 percent, and typical D50 is 0.15 mu m; the hydraulic alumina main crystal phase is rho-Al 2 O 3 ，ρ-Al 2 O 3 The content is more than or equal to 99 percent.
The water reducing agent is a mixture of sodium tripolyphosphate and polyethylene glycol groups, and the mass percentage of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5.
the explosion-proof agent is a mixture of aluminum fibers and polypropylene fibers, and the mass percentage of the aluminum fibers to the polypropylene fibers is 7: 3.
the nano Al 2 O 3 Produced by a gas phase method, and the typical D50 is 13nm, and the BET specific surface area is 100 +/-15 m 2 /g，Al 2 O 3 The content is more than or equal to 99.5 percent, and the pH value is 5-6.
The SiC fine powder is composed of black silicon carbide and green silicon carbide, and is of an alpha-SiC crystal form, wherein the mass content of the black silicon carbide is 70%, the mass content of the green silicon carbide is 30%, the SiC content in the black silicon carbide is more than or equal to 97%, the particle size is 0-0.074 mm, the SiC content in the green silicon carbide is more than or equal to 98%, and the particle size is 0-0.045 mm.
Nano Al 2 O 3 -SiC composite powder with nano Al 2 O 3 SiC fine powder as raw material, wherein the nano Al 2 O 3 The content of the composite powder is 20-40% by weight, and the balance is SiC fine powder.
Example 1
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the granule material comprises 5 percent of tabular corundum granules with the grain diameter of 5-3 mm and granules35% of plate-shaped corundum particles with the diameter of 3-1 mm, 23% of fused white corundum particles with the particle diameter of 1-0 mm, 10% of fused white corundum fine powder with the particle diameter of 0-0.045 mm, 8% of fused magnesia fine powder with the particle diameter of 0-0.074 mm, and nano Al 2 O 3 -SiC composite powder 3%, active alpha-Al 2 O 3 10% of micro powder, 5% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 4: 6; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
the nano Al 2 O 3 The preparation method of the-SiC composite powder comprises the following steps: mixing nano Al 2 O 3 Weighing the SiC fine powder according to a ratio, putting the mixture into a HYB type high-speed airflow impact mixer for mixing, firstly primarily mixing the mixture for 5min at a low speed (the rotating speed of a main machine is 100rpm), then starting the high-speed mixing (the rotating speed of the main machine is 800rpm) for mixing for 30min, enabling the nano alumina particles to be fully adsorbed and coated on the surface of the silicon carbide matrix particles, further increasing the rotating speed of the main machine to 1300rpm for mixing for 3min, and grinding the silicon carbide particles with partial defects into spherical or near-spherical particles.
The preparation method of the low-carbon pouring ladle slide plate brick comprises the following steps:
(1) mixing fine powder: according to weight percentage, corundum fine powder with the grain diameter of 0-0.045 mm, fused magnesia fine powder with the grain diameter of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder, active alpha-Al 2 O 3 Mixing the micro powder, the composite binder, the water reducing agent and the explosion-proof agent on an inclined high-speed mixer for 50min, wherein the rotating speed of a main machine of the mixer is 450 rpm;
(2) preparing granules: mixing plate-shaped corundum particles with the particle size of 5-3 mm, plate-shaped corundum particles with the particle size of 3-1 mm and fused white corundum particles with the particle size of 1-0 mm according to weight percentage;
(3) mixing the casting materials: putting the granules in the step (2) into a vertical shaft planetary stirrer for dry mixing for 5min, wherein the rotating speed of a main machine of the stirrer is more than or equal to 80rpm, adding the fine powder mixed in the step (1), continuously mixing and grinding for 6min, adding water accounting for 4 percent of the total weight, stirring for 10min, and discharging;
(4) pouring and vibration molding: pouring the mixed castable prepared in the step (3) into a mould twice, fixing the mould on a vibration platform through bolts, manually pouring the castable into the mould, then opening the vibration platform, primarily vibrating for 60 seconds, closing the vibration platform, then pouring the other half of the castable, vibrating for 6 minutes again, and stopping after floating slurry appears on the surface and no bubbles are generated;
(5) primary maintenance: curing the pouring semi-finished product prepared in the step (4) for 4 hours under a natural ventilation condition, then placing the pouring semi-finished product into a constant temperature room at 35-40 ℃ for curing for 12 hours, and then placing the pouring semi-finished product into a constant temperature room at 60-70 ℃ for curing for 12 hours;
(6) secondary curing: demolding the primarily cured product, gradually removing fastening screws of the steel template, taking down the poured sliding plate brick, placing the product in a medium-low temperature kiln for secondary curing, wherein the curing temperature is 280-300 ℃, and the curing time is 36 hours;
(7) asphalt impregnation: performing asphalt oil immersion treatment on the semi-finished product of the slide plate brick subjected to low-temperature heat treatment in the step (6) in a vacuum oil immersion tank, wherein the asphalt softening point is 70-85 ℃, the temperature in the vacuum tank is 250 ℃, the oil immersion pressure maintaining time is 7 hours, and the pressure maintaining pressure is 2.2 MPa;
(8) dry distillation and carbonization: sealing the slide plate brick soaked by the asphalt in a gas kiln for dry distillation and carbonization treatment at 850 ℃ for 8 hours;
(9) finishing treatment: and (4) performing steel hoop beating, double-sided grinding, non-working surface veneering, drying and sliding surface coating treatment on the semi-finished sliding plate brick obtained after the dry distillation carbonization treatment in the step (8), and packaging after the inspection is qualified to obtain the finished sliding plate brick.
Example 2
Low-carbon pouring ladle slide plate brick of the embodimentThe components and weight percentages are as follows: the particle material comprises 8% of plate-shaped corundum particles with the particle size of 5-3 mm, 33% of plate-shaped corundum particles with the particle size of 3-1 mm and 20% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 14% of fused white corundum fine powder with the particle size of 0-0.045 mm, 6% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 4% of-SiC composite powder and active alpha-Al 2 O 3 6 percent of micro powder, 8 percent of composite bonding agent, 0.5 percent of water reducing agent and 0.5 percent of explosion-proof agent, and the total weight percentage is 100 percent; and liquid water accounting for 5 percent of the total weight is additionally added. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
the nano Al 2 O 3 The preparation method of the-SiC composite powder comprises the following steps: mixing nano Al 2 O 3 Weighing the SiC fine powder according to a ratio, putting the mixture into a HYB type high-speed airflow impact mixer for mixing, firstly primarily mixing for 4min at a low speed (the rotating speed of a main machine is 150rpm), then starting high-speed mixing (the rotating speed of the main machine is 1000rpm) for mixing for 25min, enabling nano alumina particles to be fully adsorbed and coated on the surface of silicon carbide parent particles, further increasing the rotating speed of the main machine to 1400rpm for mixing for 3min, and grinding part of defective silicon carbide particles into spherical or near-spherical particles.
The preparation method of the low-carbon pouring ladle slide plate brick comprises the following steps:
(1) mixing fine powder: according to weight percentage, corundum fine powder with the grain diameter of 0-0.045 mm, fused magnesia fine powder with the grain diameter of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder, active alpha-Al 2 O 3 Mixing the micro powder, the composite binder, the water reducing agent and the explosion-proof agent on an inclined high-speed mixer for 40min, wherein a main machine of the mixerThe rotating speed is 450 rpm;
(2) preparing the granules: mixing plate-shaped corundum particles with the particle size of 5-3 mm, plate-shaped corundum particles with the particle size of 3-1 mm and fused white corundum particles with the particle size of 1-0 mm according to weight percentage;
(3) mixing the casting materials: putting the granules in the step (2) into a vertical shaft planetary stirrer for dry mixing for 3min, wherein the rotating speed of a main machine of the stirrer is more than or equal to 80rpm, adding the fine powder mixed in the step (1), continuously mixing and grinding for 8min, adding water accounting for 5 percent of the total weight, stirring for 8min, and discharging;
(4) pouring and vibration molding: pouring the mixed castable prepared in the step (3) into a mould twice, fixing the mould on a vibration platform through bolts, manually pouring the castable into the mould, then opening the vibration platform, primarily vibrating for 60 seconds, closing the vibration platform, then pouring the other half of the castable, vibrating for 8 minutes again, and stopping after floating slurry appears on the surface and no bubbles are generated;
(5) primary maintenance: curing the pouring semi-finished product prepared in the step (4) for 3 hours under a natural ventilation condition, then placing the pouring semi-finished product into a constant temperature room at 35-40 ℃ for 10 hours, and then placing the pouring semi-finished product into a constant temperature room at 60-70 ℃ for 15 hours;
(6) secondary curing: demolding the primarily cured product, gradually removing fastening screws of the steel template, taking down the cast slide plate brick, placing the product in a medium-low temperature kiln for secondary curing, wherein the curing temperature is 280-300 ℃, and the curing time is 24 hours;
(7) asphalt impregnation: performing asphalt oil immersion treatment on the semi-finished product of the sliding plate brick subjected to low-temperature heat treatment in the step (6) in a vacuum oil immersion tank, wherein the asphalt softening point is 70-85 ℃, the temperature in the vacuum tank is 230 ℃, the oil immersion pressure maintaining time is 7 hours, and the pressure maintaining pressure is 2.2 MPa;
(8) dry distillation and carbonization: sealing the slide plate brick after asphalt impregnation in a gas kiln for dry distillation and carbonization treatment at the temperature of 880 ℃ for 7 hours;
(9) finishing treatment: and (4) performing steel hoop beating, double-sided grinding, non-working surface veneering, drying and sliding surface coating treatment on the semi-finished sliding plate brick obtained after the dry distillation carbonization treatment in the step (8), and packaging after the inspection is qualified to obtain the finished sliding plate brick.
Example 3
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
the nano Al 2 O 3 The preparation method of the-SiC composite powder comprises the following steps: mixing nano Al 2 O 3 Weighing the SiC fine powder according to a ratio, putting the mixture into a HYB type high-speed airflow impact mixer for mixing, firstly primarily mixing the mixture for 3min at a low speed (the rotating speed of a main machine is 100rpm), then starting high-speed mixing (the rotating speed of the main machine is 1200rpm) for mixing for 30min, enabling the nano alumina particles to be fully adsorbed and coated on the surface of the silicon carbide matrix particles, further increasing the rotating speed of the main machine to 1500rpm for mixing for 3min, and grinding the silicon carbide particles with partial defects into spherical or near-spherical particles.
The preparation method of the low-carbon pouring ladle slide plate brick comprises the following steps:
(1) mixing fine powder: mixing 0-0.045 mm corundum fine powder, 0-0.074 mm fused magnesia fine powder and nano Al in percentage by weight 2 O 3 -SiC composite powder, active alpha-Al 2 O 3 Mixing the micro powder, the composite binder, the water reducing agent and the explosion-proof agent on an inclined high-speed mixer for 60min, and controlling the main machine of the mixerThe rotating speed is 450 rpm;
(2) preparing the granules: mixing plate-shaped corundum particles with the particle size of 5-3 mm, plate-shaped corundum particles with the particle size of 3-1 mm and fused white corundum particles with the particle size of 1-0 mm according to weight percentage;
(3) mixing the casting materials: putting the granules obtained in the step (2) into a vertical shaft planetary stirrer for dry mixing for 4min, wherein the rotating speed of a main machine of the stirrer is more than or equal to 80rpm, adding the fine powder mixed in the step (1), continuously mixing and grinding for 5min, adding water accounting for 4.5 percent of the total weight, stirring for 9min, and discharging;
(4) pouring and vibration molding: pouring the mixed castable prepared in the step (3) into a mould twice, fixing the mould on a vibration platform through bolts, manually pouring the castable into the mould, then opening the vibration platform, primarily vibrating for 60 seconds, closing the vibration platform, then pouring the other half of the castable, vibrating for 5 minutes again, and stopping when floating slurry appears on the surface and no bubbles are generated;
(5) primary maintenance: curing the pouring semi-finished product prepared in the step (4) for 3.5 hours under a natural ventilation condition, then placing the pouring semi-finished product into a constant temperature room at 35-40 ℃ for curing for 6 hours, and then placing the pouring semi-finished product into a constant temperature room at 60-70 ℃ for curing for 18 hours;
(6) secondary curing: demolding the primarily cured product, gradually removing fastening screws of the steel template, taking down the poured sliding plate brick, placing the product in a medium-low temperature kiln for secondary curing, wherein the curing temperature is 280-300 ℃, and the curing time is 30 hours;
(7) asphalt impregnation: performing asphalt oil immersion treatment on the semi-finished product of the sliding plate brick subjected to low-temperature heat treatment in the step (6) in a vacuum oil immersion tank, wherein the asphalt softening point is 70-85 ℃, the temperature in the vacuum tank is 200 ℃, the oil immersion pressure maintaining time is 8 hours, and the pressure maintaining pressure is 2.2 MPa;
(8) dry distillation and carbonization: sealing the slide plate brick soaked by the asphalt in a gas kiln for dry distillation and carbonization treatment at 900 ℃, and keeping the temperature for 6 hours;
(9) finishing treatment: and (4) performing steel hoop beating, double-sided grinding, non-working surface veneering, drying and sliding surface coating treatment on the semi-finished sliding plate brick obtained after the dry distillation carbonization treatment in the step (8), and packaging after the inspection is qualified to obtain the finished sliding plate brick.
Example 4
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused brown corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused brown corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 5% of-SiC composite powder and active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 2: 5: 3; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Example 5
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 4: 6; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Example 6
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 3: 7; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Example 7
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 2: 4: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 1.
Based on example 3, comparative example 1 and comparative example 2 are respectively the case of no addition of nano Al 2 O 3 -SiC composite powder, more than 5% of nano Al is added 2 O 3 -SiC composite powder, comparative Nano Al 2 O 3 The addition of the-SiC composite powder has influence on the service performance of the sliding brick.
Comparative example 1
The low-carbon pouring ladle slide plate brick of the comparative example is not added with nano Al 2 O 3 -SiC composite powder.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the granule comprises 10 percent of tabular corundum granules with the grain diameter of 5-3 mm28% of plate-shaped corundum particles with the diameter of 3-1 mm, 25% of fused white corundum particles with the particle diameter of 1-0 mm, 14% of fused white corundum fine powder with the particle diameter of 0-0.045 mm, 6% of fused magnesia fine powder with the particle diameter of 0-0.074 mm, and active alpha-Al 2 O 3 10% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein the mass ratio of calcium aluminate cement, silica powder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
the preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Comparative example 2
The low-carbon pouring ladle slide plate brick of the comparative example is added with nano Al 2 O 3 The weight percentage of the-SiC composite powder exceeds 5 percent.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 10% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 7%, active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 The mass percentage of the nano alumina to the SiC fine powder in the-SiC composite powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass of the aluminum fiber and the polypropylene fiberThe quantity ratio is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Data in Table 1 when example 3 is compared with comparative examples 1 and 2, it can be seen that nano Al is added in a proper amount 2 O 3 the-SiC composite powder can improve the density, the normal-temperature compressive strength, the high-temperature bending strength and the service life of the low-carbon pouring steel ladle slide plate brick.
Based on the example 3, the comparative example 3 and the comparative example 4 respectively do not add the fused magnesia fine powder, add more than 8% of the fused magnesia fine powder, and compare the influence of the addition of the fused magnesia fine powder on the use performance of the low-carbon pouring steel ladle slide plate brick.
Comparative example 3
The low-carbon pouring ladle slide plate brick of the comparative example does not contain fused magnesia fine powder.
The low-carbon pouring ladle slide plate brick comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 17% of fused white corundum fine powder with the particle size of 0-0.045 mm, and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent is sodium tripolyphosphate and polyethylene glycol group, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol group is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Comparative example 4
The low-carbon pouring ladle slide plate brick of the comparative example has the weight percentage of the fused magnesia fine powder over 8 percent.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 7% of fused white corundum fine powder with the particle size of 0-0.045 mm, 10% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 5% of-SiC composite powder and active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder to the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent is sodium tripolyphosphate and polyethylene glycol group, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol group is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Table 1 data example 3 compares with comparative example 3, comparative example 4, and it can be seen that the compressive strength, erosion resistance, linear expansion performance and service life of the low-carbon poured ladle slide plate brick can be improved by adding a proper amount of fused magnesia fine powder, and the main reason for analysis is that a proper amount of corundum fine powder and fused magnesia fine powder react at high temperature to generate a certain amount of in-situ spinel, so that the open pores of the slide plate brick can be effectively filled along with the volume increase effect, the porosity of the slide plate brick is reduced, and the molten steel and steel slag erosion resistance is improved; however, excessive addition of fused magnesia causes a large volume expansion effect accompanying the formation of spinel at high temperature, which causes fine cracks in the sliding plate and affects the use effect.
Based on the example 3, the comparative examples 5, 6 and 7 are respectively the electric melting white corundum, the electric melting brown corundum and the sintering plate-shaped corundum which are independently used, and the influence of different types of corundum on the use performance of the low-carbon pouring steel ladle slide plate brick is contrasted and compounded.
Comparative example 5
The low-carbon pouring ladle slide plate brick of the comparative example is prepared by mixing corundum particles and corundum fine powder.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of fused white corundum particles with the particle size of 5-3 mm, 28% of fused white corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesia fine powder with the particle size of 0-0.074 mm, and nano Al 2 O 3 5% of-SiC composite powder and active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 The mass percentage of the nano alumina to the SiC fine powder in the-SiC composite powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Comparative example 6
In the low-carbon pouring ladle slide plate brick of the comparative example, the corundum particles and the corundum fine powder are both fused brown corundum.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of fused brown corundum particles with the particle size of 5-3 mm, 28% of fused brown corundum particles with the particle size of 3-1 mm and 25% of fused brown corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused brown corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesia fine powder with the particle size of 0-0.074 mm, and nano Al 2 O 3 5% of-SiC composite powder and active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Comparative example 7
In the low-carbon pouring ladle slide plate brick of the comparative example, the corundum particles and the corundum fine powder are both plate-shaped corundum.
The low-carbon pouring ladle slide plate brick comprises the following components in percentage by weight: the particle material comprises 10 percent of tabular corundum particles with the particle size of 5-3 mm, 28 percent of tabular corundum particles with the particle size of 3-1 mm and 25 percent of tabular corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12 percent of tabular corundum fine powder with the particle size of 0-0.045 mm and 12 percent of particles5 percent of fused magnesia fine powder with the diameter of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder to the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Data in table 1, example 3 is compared with comparative examples 5, 6 and 7, and it can be seen that the high-temperature strength, high-temperature chemical stability, thermal shock stability and service life of the slide plate brick can be improved by compositely adding different types of corundum particles and corundum fine powder.
Based on example 3, comparative example 8, comparative example 9 and comparative example 10 are respectively the use of one of calcium aluminate cement, silica micropowder or hydraulic alumina as a binder, and the use performance of the low-carbon pouring ladle slide plate brick is influenced by using a composite binder.
Comparative example 8
The low-carbon pouring ladle slide plate brick of the comparative example uses the calcium aluminate cement as the bonding agent.
The low-carbon pouring ladle slide plate brick comprises the following components in percentage by weight: the particle material comprises 10% of tabular corundum particles with the particle size of 5-3 mm, 28% of tabular corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm and 0-0.074 mm fused magnesite fine powder 5% and nano Al 2 O 3 5% of-SiC composite powder and active alpha-Al 2 O 3 8 percent of micro powder, 6 percent of calcium aluminate cement, 0.5 percent of water reducing agent and 0.5 percent of explosion-proof agent, and the total weight percentage is 100 percent; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
nano Al described in this example 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Comparative example 9
The low-carbon pouring ladle slide plate brick of the comparative example uses silicon micropowder as the bonding agent.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8 percent of micro powder, 6 percent of silicon micro powder, 0.5 percent of water reducing agent and 0.5 percent of explosion-proof agent, and the total weight percentage is 100 percent; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
the nanometer scale of the present exampleAl 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Comparative example 10
The low-carbon pouring ladle slide plate brick of the comparative example is characterized in that the used binding agent is hydraulic aluminum oxide.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of plate-shaped corundum particles with the particle size of 5-3 mm, 28% of plate-shaped corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder material comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesite fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder 5%, active alpha-Al 2 O 3 8 percent of micro powder, 6 percent of hydraulic aluminum oxide, 0.5 percent of water reducing agent and 0.5 percent of explosion-proof agent, and the total weight percentage is 100 percent; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the water reducing agent is sodium tripolyphosphate and polyethylene glycol group, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol group is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
the nano Al of the embodiment 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick of the embodiment is the same as that of the embodiment 3.
Table 1 data comparing example 3 with comparative examples 8, 9, and 10, it can be seen that, compared with the addition of only one additive and the addition of the composite binder, the apparent porosity of the sliding plate brick can be reduced, and the bulk density, high temperature strength, thermal shock resistance, and service life of the sliding plate brick can be improved.
Comparative example 11
Based on the example 3, the comparative example 11 is compared with the production process of multiple dispersion, pouring, multi-stage maintenance, asphalt impregnation, dry distillation and carbonization, which is adopted by the invention, without asphalt impregnation-dry distillation and carbonization, and has influence on the service performance of the low-carbon pouring steel ladle slide plate brick.
The low-carbon pouring ladle slide plate brick of the embodiment comprises the following components in percentage by weight: the particle material comprises 10% of tabular corundum particles with the particle size of 5-3 mm, 28% of tabular corundum particles with the particle size of 3-1 mm and 25% of fused white corundum particles with the particle size of 1-0 mm, and the fine powder comprises 12% of fused white corundum fine powder with the particle size of 0-0.045 mm, 5% of fused magnesia fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 5% of-SiC composite powder and active alpha-Al 2 O 3 8% of micro powder, 6% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage is 100%; additionally adding liquid water accounting for 4.5 percent of the total weight. Wherein, the nano Al 2 O 3 Nano Al in-SiC composite powder 2 O 3 The mass percentage of the SiC fine powder is 2: 8; the mass ratio of calcium aluminate cement, silicon micropowder and hydraulic alumina in the composite binder is 1: 5: 4; the water reducing agent comprises sodium tripolyphosphate and polyethylene glycol groups, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol groups is 5: 5; the explosion-proof agent is aluminum fiber and polypropylene fiber, and the mass ratio of the aluminum fiber to the polypropylene fiber is 7: 3.
the nano Al of the embodiment 2 O 3 The preparation method of the-SiC composite powder was the same as in example 3.
The preparation method of the low-carbon pouring ladle slide plate brick comprises the following steps:
(1) mixing fine powder: according to weight percentage, corundum fine powder with the grain diameter of 0-0.045 mm, fused magnesia fine powder with the grain diameter of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder, active alpha-Al 2 O 3 Micro powder and composite binder; mixing a water reducing agent and an explosion-proof agent on an inclined high-speed mixer for 50min, wherein the rotating speed of a main machine of the mixer is 450 rpm;
(2) preparing the granules: white corundum particles with the particle size of 5-3 mm, white corundum particles with the particle size of 3-1 mm, aluminum magnesium spinel particles with the particle size of 3-1 mm and aluminum magnesium spinel particles with the particle size of 1-0 mm are mixed according to weight percentage;
(3) mixing the casting materials: putting the granules in the step (2) into a vertical shaft planetary stirrer for dry mixing for 5min, wherein the rotating speed of a main machine of the stirrer is more than or equal to 80rpm, adding the fine powder mixed in the step (1), continuously mixing and grinding for 8min, adding water accounting for 4-5% of the total weight, stirring for 10min, and discharging;
(4) pouring and vibration molding: pouring the mixed casting material prepared in the step (3) into a mould twice, fixing the mould on a vibration platform through bolts, manually pouring the casting material into the mould, then opening the vibration platform, primarily vibrating for 60 seconds, closing the vibration platform, pouring the other half of the casting material, vibrating for 6 minutes again, and stopping after floating slurry appears on the surface and no bubbles are generated;
(5) primary maintenance: curing the pouring semi-finished product prepared in the step (4) for 4 hours under a natural ventilation condition, then placing the pouring semi-finished product into a constant temperature room at 35-40 ℃ for curing for 12 hours, and then placing the pouring semi-finished product into a constant temperature room at 60-70 ℃ for curing for 12 hours;
(6) secondary curing: demoulding the product of the primary curing, gradually removing the fastening screws of the steel template, taking down the cast slide plate brick, placing the product in a medium-low temperature kiln for secondary curing at the curing temperature of 200-300 ℃ for 36 hours;
(7) and (3) finishing treatment: and (4) performing steel hoop polishing, double-sided grinding, non-working surface veneering, drying and sliding surface coating treatment on the semi-finished sliding plate brick obtained after curing in the step (6), and packaging after inspection to obtain the finished sliding plate brick.
Data in table 1 as compared with comparative example 11, it can be seen that the slide plate brick produced by the multiple dispersion-casting-multi-stage curing-asphalt impregnation-dry distillation carbonization process has lower apparent porosity, better compressive strength, thermal shock stability and longer service life.
TABLE 1 physicochemical Properties of Low-carbon-poured ladle slide brick described in examples 1 to 7 and comparative examples 1 to 11
Figure BDA0003435668220000201
The above description is further intended to describe the present invention in detail with reference to specific preferred embodiments, and it is not intended to limit the present invention to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications, additions, substitutions, and the like can be made without departing from the spirit of the invention.

Claims (7)

1. The low-carbon pouring steel ladle sliding plate brick comprises a granular material and fine powder, and is characterized in that the granular material comprises 5-10% of corundum particles with the particle size of 5-3 mm, 28-35% of corundum particles with the particle size of 3-1 mm and 20-25% of corundum particles with the particle size of 1-0 mm in percentage by mass;
the fine powder comprises 10-16% of corundum fine powder with the particle size of 0-0.045 mm, 5-8% of fused magnesia fine powder with the particle size of 0-0.074 mm, and nano Al in percentage by mass 2 O 3 3 to 5 percent of-SiC composite powder and active alpha-Al 2 O 3 6-10% of micro powder, 5-8% of composite binder, 0.5% of water reducing agent and 0.5% of explosion-proof agent, wherein the total weight percentage of the granular material and the fine powder material is 100%; water accounting for 4-5 percent of the total weight is added;
the nano Al 2 O 3 in-SiC composite powder, Al 2 O 3 Uniformly dispersed on the surface of SiC fine powder, Al 2 O 3 D50 ═ 13nm, said Al 2 O 3 The weight ratio of the SiC fine powder to the SiC fine powder is (20-40%): (60% to 80%), Al 2 O 3 The sum of the weight proportion of the SiC fine powder and the weight proportion of the SiC fine powder is 100 percent; the Al is 2 O 3 The pH value of the SiC fine powder is 5-6, and the SiC fine powder is a mixture of black silicon carbide and green silicon carbide; the composite binder is a composite of calcium aluminate cement, silicon micropowder and hydraulic alumina, and the mass ratio of the calcium aluminate cement to the silicon micropowder to the hydraulic alumina is (1-2): (4-5): (3-4).
2. The low carbon pouring ladle slide plate brick as claimed in claim 1, wherein the nano Al is 2 O 3 the-SiC composite powder is produced by adopting a gas phase method, and the method comprises the following steps:
(1) preparing materials: mixing Al 2 O 3 Weighing the SiC fine powder according to the proportion;
(2) mixing materials: impinging the Al with a high velocity gas stream 2 O 3 Mixing with SiC fine powder.
3. The low carbon pouring ladle slide plate brick as claimed in claim 2, wherein Al in step (2) 2 O 3 Mixing the SiC fine powder and the high-speed airflow impact type mixer for 3-5 min, wherein the rotating speed of a main machine is 100-200 rpm; mixing materials at a high speed for 20-30 min, wherein the rotating speed of a main machine is 800-1200 rpm; further mixing for 3min, and the rotating speed of the main machine is more than or equal to 1200 rpm.
4. The low-carbon pouring steel ladle slide plate brick as claimed in claim 1, wherein the water reducing agent is a mixture of sodium tripolyphosphate and polyethylene glycol, and the mass ratio of the sodium tripolyphosphate to the polyethylene glycol is 5: 5.
5. the low-carbon pouring ladle slide plate brick as claimed in claim 1, wherein the explosion-proof agent is a mixture of aluminum fibers and polypropylene fibers, and the mass ratio of the aluminum fibers to the polypropylene fibers is 7: 3.
6. a method of making a low carbon castable ladle slide brick according to any one of claims 1 to 5, comprising the steps of:
(1) mixing fine powder: proportionally mixing corundum fine powder with the particle size of 0-0.045 mm, fused magnesia fine powder with the particle size of 0-0.074 mm and nano Al 2 O 3 -SiC composite powder, active alpha-Al 2 O 3 Mixing the micro powder, the composite binder, the water reducing agent and the explosion-proof agent;
(2) preparing granules: mixing 5-3 mm corundum particles, 3-1 mm corundum particles and 1-0 mm corundum particles according to weight percentage;
(3) mixing the casting materials: mixing and stirring the granular materials in the step (2), adding the fine powder materials mixed in the step (1), continuously mixing and grinding, adding water in proportion, stirring and discharging;
(4) pouring and vibration molding: pouring the casting material prepared in the step (3) into a mould twice, and stopping when floating slurry appears on the surface and no bubbles are generated;
(5) primary maintenance: curing the pouring semi-finished product prepared in the step (4) under a natural ventilation condition;
(6) secondary curing: demolding the primarily cured product, and placing the product in a medium-low temperature kiln for secondary curing;
(7) asphalt impregnation: performing oil immersion treatment on the semi-finished product of the sliding plate brick subjected to secondary maintenance in the step (6);
(8) dry distillation and carbonization: sealing the slide plate brick after asphalt impregnation in a gas kiln for dry distillation and carbonization treatment;
(9) finishing treatment: and (4) performing steel hoop beating, double-sided grinding, non-working surface veneering, drying and sliding surface coating treatment on the semi-finished sliding plate brick obtained after the dry distillation carbonization treatment in the step (8), and packaging after the inspection is qualified to obtain the finished sliding plate brick.
7. The preparation method of the low-carbon pouring ladle slide plate brick according to claim 6, wherein the fine powder in the step (1) is mixed for 40-60 min; mixing the granules in the step (3) for 3-5 min, mixing and grinding the fine powder for 5-8 min, adding water and stirring for 8-10 min; the mixed castable is subjected to initial shock for 60 seconds, the vibration platform is closed, the other half of the castable is poured in, and the vibration is carried out for 5-8 min again; curing for 3-4 hours in the step (5), and curing for 6-12 hours at the constant temperature of 35-40 ℃ and curing for 12-18 hours at the constant temperature of 60-70 ℃; in the step (6), the secondary curing temperature is 280-300 ℃, and the curing time is 24-36 hours; in the step (7), the softening point of asphalt is 70-85 ℃, the oil immersion temperature is 200-250 ℃, the oil immersion pressure maintaining time is more than 6 hours, and the pressure maintaining pressure is more than 2 MPa; and (8) performing dry distillation and carbonization treatment at 850-900 ℃ for 6-8 hours.
CN202111611715.7A 2021-12-27 2021-12-27 Nano Al 2 O 3 -SiC composite powder, low-carbon pouring ladle slide plate brick and preparation method thereof Active CN114105659B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111611715.7A CN114105659B (en) 2021-12-27 2021-12-27 Nano Al 2 O 3 -SiC composite powder, low-carbon pouring ladle slide plate brick and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111611715.7A CN114105659B (en) 2021-12-27 2021-12-27 Nano Al 2 O 3 -SiC composite powder, low-carbon pouring ladle slide plate brick and preparation method thereof

Publications (2)

Publication Number Publication Date
CN114105659A CN114105659A (en) 2022-03-01
CN114105659B true CN114105659B (en) 2022-09-13

Family

ID=80363102

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111611715.7A Active CN114105659B (en) 2021-12-27 2021-12-27 Nano Al 2 O 3 -SiC composite powder, low-carbon pouring ladle slide plate brick and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114105659B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116199503B (en) * 2023-01-31 2024-04-12 马鞍山利尔开元新材料有限公司 Al is added 2 O 3 -Si 3 N 4 Composite powder sliding plate brick, composite sliding plate brick and preparation method thereof
CN116375456B (en) * 2023-03-10 2024-03-29 北京瑞普同创科技发展有限公司 Pouring material for tundish cover

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100797823B1 (en) * 2006-09-19 2008-01-24 재단법인 포항산업과학연구원 Manufacturing method of al coating pipe
CN104671751A (en) * 2015-01-21 2015-06-03 东北大学 Method for preparing closed-pore alumina-based ceramic with controllable pore size
CN110723963A (en) * 2019-10-31 2020-01-24 中冶武汉冶金建筑研究院有限公司 Blast furnace tapping channel castable containing nano alumina and preparation method thereof
CN112456986A (en) * 2020-12-11 2021-03-09 马鞍山利尔开元新材料有限公司 Long-life ladle upper nozzle brick for calcium-treated steel and preparation method thereof
CN113292321A (en) * 2021-06-23 2021-08-24 郑州振东科技有限公司 Steel ladle low-carbon working lining brick

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100797823B1 (en) * 2006-09-19 2008-01-24 재단법인 포항산업과학연구원 Manufacturing method of al coating pipe
CN104671751A (en) * 2015-01-21 2015-06-03 东北大学 Method for preparing closed-pore alumina-based ceramic with controllable pore size
CN110723963A (en) * 2019-10-31 2020-01-24 中冶武汉冶金建筑研究院有限公司 Blast furnace tapping channel castable containing nano alumina and preparation method thereof
CN112456986A (en) * 2020-12-11 2021-03-09 马鞍山利尔开元新材料有限公司 Long-life ladle upper nozzle brick for calcium-treated steel and preparation method thereof
CN113292321A (en) * 2021-06-23 2021-08-24 郑州振东科技有限公司 Steel ladle low-carbon working lining brick

Also Published As

Publication number Publication date
CN114105659A (en) 2022-03-01

Similar Documents

Publication Publication Date Title
CN114105659B (en) Nano Al 2 O 3 -SiC composite powder, low-carbon pouring ladle slide plate brick and preparation method thereof
CN107698266B (en) Hot-blast stove pipeline sealing material and preparation method thereof
CN108046784A (en) A kind of high alumina refractory casting material and preparation method thereof
CN101544505A (en) Nano Al2O3 and MgO composite ceramic bonded spinel-magnesia fireproof casting material and preparation method thereof
CN111850377B (en) In-situ Al2O3Preparation method of particle reinforced aluminum matrix composite
CN115991597B (en) Self-flowing castable for sol combined hearth
CN115321956B (en) High-temperature liquid phase toughened magnesia carbon brick and preparation method thereof
CN101875561A (en) Nano-SiO2 and nano-CaO composite ceramic bond siliceous refractory castable and preparation method thereof
CN106518043A (en) Preparing method of low-cost Al-Ca-Si tin bath bottom block
CN113968724B (en) Metal modified magnesia, low-carbon converter magnesium sliding plate and preparation method thereof
CN106699205B (en) Sol-combined blast furnace lining wet-process spray coating and preparation method thereof
CN106946550B (en) A kind of magnesia-spinel brick and preparation method thereof that antistrip performance is excellent
CN109851333A (en) Main trough of blast furnace Nano sol bonded wear-resistant plate and the preparation method and application thereof
CN109320257A (en) A kind of preparation method of high intensity high porosity porous silicon nitride ceramic
CN116730732A (en) Low-pollution long nozzle body material
CN112745134A (en) Air brick containing corundum ceramic balls and preparation method thereof
CN113979761B (en) Ternary composite self-repairing baking-free sliding plate brick and preparation method thereof
CN115745483A (en) High-strength cementing material based on fine particle sludge and preparation method thereof
CN112759381B (en) Carbon-free ladle down nozzle and preparation method thereof
CN114671693A (en) High-performance refractory castable
CN113105219A (en) Crucible and preparation method thereof
CN116813316B (en) Microporous corundum-nano silicon carbide-carbon composite material, converter slag-blocking sliding plate brick and preparation methods thereof
CN115894054B (en) Mullite combined corundum-silicon carbide kiln mouth castable and kiln mouth prefabricated member
CN116143529B (en) Environment-friendly iron runner castable and preparation method thereof
CN115974567B (en) Preparation method for improving thermal shock stability of castable by utilizing weak combination

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant