CN114477976A - Cementing material for steel ladle and preparation method thereof - Google Patents
Cementing material for steel ladle and preparation method thereof Download PDFInfo
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- CN114477976A CN114477976A CN202210049850.5A CN202210049850A CN114477976A CN 114477976 A CN114477976 A CN 114477976A CN 202210049850 A CN202210049850 A CN 202210049850A CN 114477976 A CN114477976 A CN 114477976A
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- cementing material
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- 239000000463 material Substances 0.000 title claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 16
- 239000010959 steel Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 41
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000004568 cement Substances 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 25
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 19
- 239000010431 corundum Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 10
- 229940095564 anhydrous calcium sulfate Drugs 0.000 claims abstract description 10
- 239000004917 carbon fiber Substances 0.000 claims abstract description 10
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 9
- 235000019738 Limestone Nutrition 0.000 claims abstract description 9
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 9
- 239000010881 fly ash Substances 0.000 claims abstract description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006028 limestone Substances 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000000498 ball milling Methods 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011449 brick Substances 0.000 abstract description 7
- 239000011819 refractory material Substances 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000011049 filling Methods 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical group [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/105—Refractories from grain sized mixtures containing chromium oxide or chrome ore
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- 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
-
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- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6316—Binders based on silicon compounds
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- 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
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—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
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—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
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- 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
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- 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
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- 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
- C04B2235/5248—Carbon, e.g. graphite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
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- 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
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- Structural Engineering (AREA)
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Abstract
The invention discloses a cementing material for a steel ladle and a preparation method thereof, belonging to the technical field of refractory materials, wherein limestone, alumina, kaolin and fly ash which are proportioned are used as raw materials, and are calcined and then mixed with anhydrous calcium sulfate again to obtain a cement material with good refractory performance, so that the bonding effect of chrome corundum particles and magnesia particles is increased, the silicon dioxide micropowder has a good filling effect, the mixing degree of each material is increased through the dispersion effect of a dispersing agent, and the properties of the cementing material are uniform; the alpha-alumina micro powder and the rho-alumina micro powder can improve the bonding effect of the sintered chrome corundum particles and the sintered magnesia particles, the water consumption of the cementing material can be reduced by the water reducing agent, the viscosity is increased, the viscosity of the cementing material is further increased by the tackifier, the carbon fiber powder is used in a matched manner, so that cracks are not easy to generate after the cementing material is dried, the collapse degree of the dried cementing material is smaller, the bonding performance is better, and the bonding strength of the base of the sintered steel ladle and the bottom brick meets the use requirement.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a cementing material for a steel ladle and a preparation method thereof.
Background
The ladle is generally referred to as a ladle, which is a container used in steel plants and foundries for receiving molten steel and performing pouring operation before an open hearth furnace, an electric furnace or a converter, and is generally formed by piling refractory bricks, and the brick joints among the refractory bricks are connected by pouring by using cementing materials. At present, corundum cementing materials between a base and a bottom brick of a steel ladle contain more plate-shaped corundum, white corundum and other materials with stable performance, can far meet the requirement of the service life of the steel ladle, but have higher price, and along with the reduction of economic benefits of the traditional metallurgical industry, the corundum cementing materials need to meet the use requirement and reduce the investment for steel enterprises and refractory material production enterprises. Therefore, it is necessary to increase the strength of the binder while reducing the amount of tabular corundum and white corundum.
Disclosure of Invention
The invention aims to provide a cementing material for a steel ladle and a preparation method thereof, which aim to solve the problems in the background technology.
The purpose of the invention can be realized by the following technical scheme: the cementing material for the steel ladle comprises the following components in parts by mass: 50-60 parts of chrome corundum particles, 20-30 parts of magnesia particles, 0.5-2 parts of alpha-alumina micro powder, 0.5-2 parts of rho-alumina micro powder, 1-3 parts of silica micro powder, 0.5-1 part of carbon fiber powder, 10-15 parts of cement material, 0.3-0.5 part of dispersing agent, 0.1-0.5 part of water reducing agent, 0.4-0.8 part of tackifier and 20-26 parts of water;
a preparation method of a cementing material for a ladle comprises the following steps:
the method comprises the following steps: stirring and mixing limestone, alumina, kaolin and fly ash, transferring the mixture to a drying oven at 40-50 ℃ for drying for 6-12h, then carrying out ball milling and crushing by using a ball mill, and sieving by using a 200-mesh sieve to obtain mixed fine powder; adding 0.1-0.15 times of water into the mixed fine powder, stirring and mixing, then adding into a mould, pressing mud cakes under the pressure of 10MPa, and drying the mud cakes in a drying oven at 40-50 ℃;
step two: transferring the mud cake into a ceramic crucible, calcining for 1-2h by using a high-temperature electric furnace under the conditions of 1000-1300 ℃, and then rapidly cooling to room temperature to obtain clinker; ball-milling and crushing the clinker and the anhydrous calcium sulfate by using a ball mill, and sieving by using a 200-mesh sieve to obtain a cement material;
step three: stirring and mixing the chrome corundum particles, the magnesia particles, the alpha-alumina micro powder, the rho-alumina micro powder, the dispersing agent, the silica micro powder, the carbon fiber powder, the cement material, the tackifier, the water reducing agent and water in proportion to obtain a cementing material;
further, the dosage ratio of limestone, alumina, kaolin and fly ash is 100 g: 50-80 g: 50-60 g: 10-13 g;
further, the dosage ratio of clinker to anhydrous calcium sulfate is 100 g: 4-5 g;
further, the dispersant is polyvinylpyrrolidone;
further, the tackifier is phenolic resin;
further, the water reducing agent is one or two of sodium tripolyphosphate and sodium hexametaphosphate which are mixed according to any ratio;
further, the grain diameter of the chromium corundum particles is 1-3 mm; the particle size of the magnesia particles is 0.2-1 mm;
furthermore, the particle sizes of the alpha-alumina micro powder, the rho-alumina micro powder and the silicon dioxide micro powder are all 120-180 meshes;
further, the particle size of the carbon fiber powder is 100-150 mesh.
The invention has the beneficial effects that: the cementing material for the steel ladle mainly adopts chrome corundum particles as raw materials, has lower price than plate-shaped corundum and white corundum, and is beneficial to reducing the production cost; limestone, alumina, kaolin and fly ash which are proportioned are used as raw materials, and are calcined and then mixed with anhydrous calcium sulfate again to obtain a cement material with good fire resistance, so that the bonding effect of chromium corundum particles and magnesia particles is improved, the silicon dioxide micropowder has a good filling effect, the mixing degree of the materials is improved through the dispersion effect of a dispersing agent, and the properties of the cementing material are uniform; alpha-alumina micropowder, rho-alumina micropowder can increase the bonding effect of the sintered chrome corundum particles and magnesia particles, the water reducing agent can reduce the water consumption of the cementing material, increase the viscosity, the tackifier further increases the viscosity of the cementing material, the carbon fiber powder is used in a matching way, so that the cementing material is not easy to crack after being dried, the collapse degree of the dried cementing material is smaller, the bonding performance is better, the cementing material at the position of a brick joint can keep better stability, the steel slag is not easy to remain after sintering, and the bonding strength of the base of the steel ladle and the bottom brick meets the use requirement.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation of the cement material comprises the following preparation steps:
the method comprises the following steps: stirring and mixing 1kg of limestone, 500g of alumina, 50g of kaolin and 10g of fly ash, transferring the mixture to a drying oven at 40 ℃ for drying for 6 hours, then carrying out ball milling and crushing by using a ball mill, and sieving by using a 200-mesh sieve to obtain mixed fine powder; taking 1kg of mixed fine powder, adding 100g of water, stirring and mixing, then adding the mixed fine powder into a mold, pressing a mud cake under the pressure of 10MPa, and drying the mud cake in a drying oven at 40 ℃;
step two: transferring the dried mud cake into a ceramic crucible, calcining for 1h at 1000 ℃ by using a high-temperature electric furnace, and then rapidly cooling to room temperature to obtain clinker; 1kg of clinker and 40g of anhydrous calcium sulfate are taken to be ground together by a ball mill, and the ground mixture is sieved by a 200-mesh sieve to obtain the cement material.
Example 2
The preparation of the cement material comprises the following preparation steps:
the method comprises the following steps: stirring and mixing 1kg of limestone, 600g of alumina, 55g of kaolin and 12g of fly ash, transferring the mixture to a 45 ℃ oven for drying for 9 hours, then carrying out ball milling and crushing by using a ball mill, and sieving by using a 200-mesh sieve to obtain mixed fine powder; taking 1kg of mixed fine powder, adding 120g of water, stirring and mixing, then adding the mixed fine powder into a mold, pressing a mud cake under the pressure of 10MPa, and drying the mud cake in a baking oven at 45 ℃;
step two: transferring the dried mud cake into a ceramic crucible, calcining for 1.5h at 1200 ℃ by using a high-temperature electric furnace, and then rapidly cooling to room temperature to obtain clinker; 1kg of clinker and 45g of anhydrous calcium sulfate are taken to be ground together by a ball mill, and the ground mixture is sieved by a 200-mesh sieve to obtain the cement material.
Example 3
The preparation of the cement material comprises the following preparation steps:
the method comprises the following steps: stirring and mixing 1kg of limestone, 800g of alumina, 60g of kaolin and 13g of fly ash, transferring the mixture into a 50 ℃ oven for drying for 12 hours, then carrying out ball milling and crushing by using a ball mill, and sieving by using a 200-mesh sieve to obtain mixed fine powder; taking 1kg of mixed fine powder, adding 150g of water, stirring and mixing, then adding the mixed fine powder into a mold, pressing a mud cake under the pressure of 10MPa, and drying the mud cake in a drying oven at 50 ℃;
step two: transferring the dried mud cake into a ceramic crucible, calcining for 2 hours at 1300 ℃ by using a high-temperature electric furnace, and then rapidly cooling to room temperature to obtain clinker; 1kg of clinker and 50g of anhydrous calcium sulfate are taken to be ground together by a ball mill, and the ground mixture is sieved by a 200-mesh sieve to obtain the cement material.
Example 4
Adding the raw materials into a mixer according to the proportion of table 1, stirring and mixing to obtain a cementing material;
TABLE 1
Example 5
Adding the raw materials into a mixer according to the proportion shown in the table 2, stirring and mixing to obtain a cementing material;
TABLE 2
| / | Dosage of | Particle size/granularity |
| Chromium corundum particles | 5.5kg | 2mm |
| Magnesia particle | 2.5kg | 0.5mm |
| Alpha-alumina micropowder | 100g | 150 mesh |
| Fine powder of rho-alumina | 100g | 150 mesh |
| Silica micropowder | 0.2kg | 150 mesh |
| Carbon fiber powder | 80g | 120 mesh |
| Example 2 Cement Material | 1.2kg | 200 mesh |
| Polyvinylpyrrolidone | 40g | / |
| Phenolic resin | 60g | / |
| Sodium hexametaphosphate | 30g | / |
| Water (W) | 2.3kg | / |
Example 6
Adding the raw materials into a mixer according to the proportion of table 3, stirring and mixing to obtain a cementing material;
TABLE 3
Comparative example 1: based on example 6, the cement material prepared in example 3 was replaced with conch brand high alumina cement purchased from kunhao Yongsheng trade limited, Guizhou, and the other components and proportions were kept unchanged to prepare a cementitious material.
Comparative example 2: on the basis of example 6, carbon fiber powder was not added, and the other components and the compounding ratio were kept unchanged, to prepare a cement.
Comparative example 3: based on example 6, the cement material prepared in example 3 was replaced with conch brand high alumina cement purchased from kunhao Yongsheng trade limited, Guizhou, and the carbon fiber powder was not added, and the other components and the mixture ratio were kept unchanged to prepare a cementitious material.
The cements prepared in examples 4-6 and comparative examples 1-3 were tested for initial setting time and final setting time according to GB/T13462011 and for the strength of the cement after drying, and the data were recorded with the results shown in Table 4:
TABLE 4
As can be seen from Table 4, the cements prepared in examples 4-6 dried faster and had higher strength after drying.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The cementing material for the steel ladle is characterized by comprising the following raw materials in parts by mass:
50-60 parts of chrome corundum particles, 20-30 parts of magnesia particles, 0.5-2 parts of alpha-alumina micro powder, 0.5-2 parts of rho-alumina micro powder, 1-3 parts of silica micro powder, 0.5-1 part of carbon fiber powder, 10-15 parts of cement material, 0.3-0.5 part of dispersing agent, 0.1-0.5 part of water reducing agent, 0.4-0.8 part of tackifier and 20-26 parts of water; the cement material is prepared by the following steps:
stirring and mixing limestone, alumina, kaolin and fly ash, transferring the mixture to a drying oven at 40-50 ℃ for drying for 6-12h, carrying out ball milling, and sieving the mixture by a 200-mesh sieve to obtain mixed fine powder; and stirring and mixing the mixed fine powder and 0.1-0.15 times of water by mass, pressing a mud cake under the pressure of 10MPa, drying the mud cake at the temperature of 40-50 ℃, and calcining and proportioning to obtain the cement material.
2. The binder for a ladle according to claim 1, wherein the ingredients are calcined by a method comprising: calcining the mud cake for 1-2h at the temperature of 1000-1300 ℃, then rapidly cooling to room temperature to obtain clinker and anhydrous calcium sulfate, mixing and ball-milling the clinker and the anhydrous calcium sulfate, and sieving by a 200-mesh sieve to obtain the cement material.
3. The cementing material for the ladle according to claim 2, characterized in that the ratio of the clinker to the anhydrous calcium sulfate is 100 g: 4-5 g.
4. The cementing material for the ladle as claimed in claim 1, wherein the dosage ratio of the limestone, the alumina, the kaolin and the fly ash is 100 g: 50-80 g: 50-60 g: 10-13 g.
5. The ladle binder of claim 1, wherein the dispersant is polyvinylpyrrolidone.
6. The cementing material for the ladle as defined in claim 1, wherein the water reducing agent is one or two of sodium tripolyphosphate and sodium hexametaphosphate mixed in any ratio.
7. The method for preparing the cementing material for the ladle according to the claim 1, which is characterized by comprising the following steps:
stirring and mixing the chrome corundum particles, the magnesia particles, the alpha-alumina micro powder, the rho-alumina micro powder, the dispersing agent, the silica micro powder, the carbon fiber powder, the cement material, the tackifier, the water reducing agent and water to obtain the cementing material.
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