CN115231906A - Gunning material for steel ladle molten pool and gunning method thereof - Google Patents
Gunning material for steel ladle molten pool and gunning method thereof Download PDFInfo
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- CN115231906A CN115231906A CN202210890530.2A CN202210890530A CN115231906A CN 115231906 A CN115231906 A CN 115231906A CN 202210890530 A CN202210890530 A CN 202210890530A CN 115231906 A CN115231906 A CN 115231906A
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- gunning
- ladle
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 71
- 239000010431 corundum Substances 0.000 claims abstract description 71
- 239000000203 mixture Substances 0.000 claims abstract description 58
- 239000000843 powder Substances 0.000 claims abstract description 33
- 238000005507 spraying Methods 0.000 claims abstract description 26
- 239000011449 brick Substances 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 15
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000007767 bonding agent Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 42
- 239000011230 binding agent Substances 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 16
- 150000004645 aluminates Chemical class 0.000 claims description 14
- 239000011777 magnesium Substances 0.000 claims description 14
- 229910052749 magnesium Inorganic materials 0.000 claims description 14
- 235000006408 oxalic acid Nutrition 0.000 claims description 14
- 239000001509 sodium citrate Substances 0.000 claims description 14
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 14
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 12
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 12
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000011083 sodium citrates Nutrition 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229940092782 bentonite Drugs 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229940080314 sodium bentonite Drugs 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009847 ladle furnace Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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
- C04B35/01—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
- B22D41/023—Apparatus used for making or repairing linings
-
- 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
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- 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
- C04B2235/34—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
-
- 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
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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- C—CHEMISTRY; METALLURGY
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—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
Abstract
The invention discloses a gunning mix for a steel ladle, which comprises the following raw materials in percentage by weight: 83 to 89 percent of aggregate, 10 to 15 percent of bonding agent, 0.5 to 1 percent of dispersant and 0.5 to 1 percent of additive; the aggregate consists of white corundum and tabular corundum fine powder; the white corundum is 1-3mm and 0-1mm aggregates, and the tabular corundum fine powder is 325-mesh tabular corundum fine powder; the preparation method of the gunning mix for the steel ladle comprises the following steps: weighing the aggregate, the bonding agent, the dispersing agent and the additive according to the formula amount, and uniformly mixing in a stirrer to obtain the composite material; the gunning method of the gunning material for the steel ladle comprises the steps of pouring the gunning material into a spraying machine, and quickly mixing the gunning material with water to form mortar with adhesiveness; the mortar is evenly sprayed on the ladle molten pool brick, the ladle is maintained at normal temperature, then the ladle is baked, and the ladle molten pool brick baked at high temperature has even tolerance, so that the service life of the whole molten pool brick can be prolonged.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a gunning material for a steel ladle and a gunning method thereof.
Background
The steel ladle is one of the devices required by the steelmaking process and is used for containing molten steel; the molten pool brick is a brick arranged on the wall of a ladle, and most of the ladle molten pool bricks at present do not adopt gunning material lining manufacturing technology, but are directly used for offline dismantling. Therefore, the service life of the ladle furnace-melting brick is difficult to be prolonged, and the service life of the whole furnace-melting brick is influenced when the furnace-melting brick is not uniformly damaged.
In recent years, with the demand for the increase of the service life of ladle furnace bricks, some manufacturers increase the thickness of the furnace bricks. The method can improve the number of the used furnaces of the melting bath bricks to a certain extent, but the thickening of the melting bath bricks causes the volume of the whole ladle to be reduced, influences the steel loading quantity and runs counter to the fast-paced production of a steel mill.
Disclosure of Invention
In order to prolong the whole service life of the molten pool brick and not influence the production rhythm of the ladle, the invention provides the gunning material for the ladle and a preparation method and a gunning method thereof.
The purpose of the invention can be realized by the following technical scheme:
the gunning mix for the steel ladle comprises the following raw materials in percentage by weight: 83 to 89 percent of aggregate, 10 to 15 percent of bonding agent, 0.5 to 1 percent of dispersant and 0.5 to 1 percent of additive; the aggregate consists of white corundum and tabular corundum fine powder; the white corundum is 1-3mm and 0-1mm aggregate, and the tabular corundum fine powder is 325-mesh tabular corundum fine powder.
The white corundum is prepared by using high-quality alumina powder as a raw material and performing electric melting, refining and crystallization, has the hardness slightly higher than that of brown corundum, and has the advantages of slightly lower toughness, high purity, good self-sharpening property, strong grinding capability, small heat productivity, high efficiency, acid and alkali corrosion resistance and good high-temperature heat stability.
The tabular corundum is pure and has no addition of MgO and B 2 O 3 The sintered corundum which is fired by any additive and has complete shrinkage has a plate-shaped crystal structure, small pores, more closed pores, porosity which is approximately equal to that of the fused corundum, high purity and good thermal shock stabilityAnd (4) sex.
Further, the mass ratio of 1-3mm white corundum aggregate, 0-1mm white corundum aggregate and 325-mesh plate-shaped corundum powder is 1:1.17:0.6-0.8.
Further, the binding agent is one of pure aluminate cement, magnesium binding agent and silica sol.
Furthermore, the binding agent can also be a mixture of pure aluminate cement and a magnesium binding agent; the mass ratio of the pure aluminate cement to the magnesium binder in the mixture of the pure aluminate cement and the magnesium binder is 1.
Further, the dispersant is one of oxalic acid, sodium citrate and sodium tripolyphosphate.
Further, the dispersing agent can also be a mixture of oxalic acid and sodium citrate; the mass ratio of the oxalic acid to the sodium citrate in the mixture of the oxalic acid and the sodium citrate is 1.
Further, the additive is one of silicon micropowder, bentonite and carboxymethyl cellulose.
Furthermore, the additive can also be a silicon micropowder carboxymethyl cellulose mixture; the mass ratio of the silicon micropowder carboxymethyl cellulose in the silicon micropowder carboxymethyl cellulose mixture is 1.
Further, the preparation method of the gunning material for the steel ladle comprises the following steps: weighing the aggregate, the binding agent, the dispersing agent and the additive according to the formula amount, and uniformly mixing in a stirrer to obtain the material.
A gunning method of gunning material for a ladle comprises the following steps:
s1, pouring gunning mix into a spraying machine during construction on a ladle construction site, and quickly mixing the gunning mix with water at a nozzle to form mortar with adhesiveness;
s2, uniformly spraying mortar on the ladle molten pool bricks, wherein the spraying thickness is 20-30mm, curing at normal temperature for 24 hours after spraying is finished, and then baking the ladle, wherein the baking is generally as follows: the small fire is carried out at 100-200 ℃ for 12 hours, the medium fire is carried out at 350-450 ℃ for 12 hours, and the large fire is carried out at 600-800 ℃ for 12 hours.
The invention has the beneficial effects that:
(1) The invention provides a gunning mix for a steel ladle, which takes tabular corundum as fine powder, and is added with a proper amount of bonding agent and additive to prepare the high-performance gunning mix for the steel ladle, after the gunning mix is used, the whole service life of a steel ladle molten pool brick is prolonged, the service life can reach 171 furnaces and is more than 20 furnaces higher than a high-alumina cement brick, and the production efficiency of a steel mill is greatly improved;
(2) The used white corundum and tabular corundum both have good thermal stability, and are mixed with the binding agent, the dispersing agent and the additive, so that the gunning material has good heat resistance and high pressure resistance, the adopted gunning method enables the gunning material to be uniformly sprayed on the ladle molten pool brick, the adhesion rate is as high as 99.2%, and the spraying thickness is 20-30mm, therefore, the gunning material has uniform tolerance after being baked at high temperature, and the service life of the whole molten pool brick can be further prolonged.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, 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
A gunning mix for a steel ladle is prepared by mixing aggregate, pure aluminate cement, oxalic acid and silica micropowder; the aggregate consists of white corundum and tabular corundum fine powder; the white corundum is 1-3mm and 0-1mm aggregate, and the tabular corundum powder is 325-mesh tabular corundum powder;
the gunning material comprises the following ingredients:
30% of white corundum aggregate with the thickness of 1-3 mm;
35% of white corundum aggregate with the thickness of 0-1 mm;
325-mesh plate-shaped corundum powder material is 18 percent;
15% of pure aluminate cement;
1% of oxalic acid;
1 percent of silicon micropowder.
A method for preparing the gunning mix for the ladle comprises the following steps of weighing 1-3mm and 0-1mm white corundum aggregate, 325-mesh plate-shaped corundum powder, pure aluminate cement, oxalic acid and silicon micropowder according to the proportion strictly according to the proportion, and uniformly mixing and packaging the materials in a stirrer for shipment; the steel ladle gunning material is detected to be linearly changed (%) at 1500 ℃ for 3 h: 0.52 percent; the compressive strength was 57.3MPa.
A gunning method of gunning material for a ladle comprises the following steps:
s1, pouring a proper amount of gunning mix into a special spraying machine during construction on a ladle construction site, and quickly mixing the gunning mix with water at a gunning mouth to form mortar with adhesiveness;
s2, uniformly spraying mortar on the ladle molten pool brick, wherein the spraying thickness is 25mm, the adhesion rate is 99.2%, maintaining at normal temperature for 24 hours after spraying is finished, and then baking the ladle, wherein the baking is generally carried out according to the following steps: the small fire is carried out for 12 hours at 150 ℃, the medium fire is carried out for 12 hours at 400 ℃ and the big fire is carried out for 12 hours at 700 ℃.
Example 2
A gunning mix for a steel ladle is prepared by mixing white corundum, tabular corundum powder, a magnesium bonding agent, sodium citrate and bentonite; the aggregate consists of white corundum and tabular corundum fine powder; the white corundum is 1-3mm and 0-1mm aggregates, and the tabular corundum powder is 325-mesh tabular corundum powder;
the gunning material comprises the following ingredients:
30% of white corundum aggregate with the thickness of 1-3 mm;
35% of white corundum aggregate with the thickness of 0-1 mm;
21 percent of 325-mesh plate-shaped corundum powder;
12% of a magnesium bonding agent;
1% of sodium citrate;
and (3) bentonite 1.
A method for preparing a gunning mix for a steel ladle comprises the following steps of weighing 1-3mm and 0-1mm white corundum aggregate, tabular corundum powder, magnesium bonding agent, sodium citrate and bentonite according to the proportion strictly, mixing uniformly in a stirrer, packaging and discharging; the steel ladle gunning material was detected to change linearly (%) at 1500 ℃ for 3 h: 0.49 percent; the compressive strength was 61.7MPa.
A gunning method of gunning material for a ladle comprises the following steps:
s1, in a ladle construction site, pouring a proper amount of gunning mix into a special spraying machine during construction, and quickly mixing a spray gun port with water to obtain adhesive mortar;
s2, uniformly spraying the mortar on a ladle molten pool brick, wherein the adhesion rate is 98.8%, the spraying thickness is 20-30mm, maintaining at normal temperature for 24 hours after the spraying is finished, and then baking the ladle, wherein the baking is generally as follows: the temperature is controlled by small fire at 170 ℃ for 12 hours, the temperature is controlled by middle fire at 450 ℃ for 12 hours, and the temperature is controlled by large fire at 770 ℃ for 12 hours.
Example 3
The gunning mix for the steel ladle comprises aggregate, a bonding agent, a dispersing agent and an additive;
the aggregate consists of white corundum and tabular corundum powder;
the white corundum is 1-3mm and 0-1mm aggregates, and the tabular corundum powder is 325-mesh tabular corundum powder;
the gunning material comprises the following ingredients:
30 percent of white corundum aggregate with the particle size of 1-3mm,
35 percent of white corundum aggregate with the thickness of 0-1mm,
325 meshes of plate-shaped corundum powder material 24 percent,
10 percent of silica sol,
0.5 percent of sodium tripolyphosphate,
Carboxymethyl cellulose 0.5.
A preparation method of a gunning mix for a steel ladle comprises the following steps of weighing 1-3mm and 0-1mm white corundum aggregate, sodium tripolyphosphate and carboxymethyl cellulose according to the proportion strictly, and uniformly mixing in a stirrer for packaging and shipment; the steel ladle gunning material was detected to change linearly (%) at 1500 ℃ for 3 h: 0.54 percent; the compressive strength was 59.5MPa.
A gunning method of gunning material for a ladle comprises the following steps:
s1, in a ladle construction site, pouring a proper amount of gunning mix into a special spraying machine during construction, and quickly mixing a spray gun port with water to obtain adhesive mortar;
s2, uniformly spraying mortar on the ladle molten pool brick, wherein the adhesion rate is 98.5%, the spraying thickness is 20-30mm, maintaining at normal temperature for 24 hours after spraying is finished, and then baking the ladle, wherein the baking is generally carried out according to the following steps: the small fire is carried out at 120 ℃ for 12 hours, the medium fire is carried out at 350 ℃ for 12 hours, and the large fire is carried out at 650 ℃ for 12 hours.
Example 4
The gunning mix for the steel ladle is formed by mixing aggregate, a binding agent and an additive;
the aggregate consists of white corundum and tabular corundum fine powder;
the white corundum is 1-3mm and 0-1mm aggregates, and the tabular corundum powder is 325-mesh tabular corundum powder;
the gunning material comprises the following ingredients in parts by weight:
30% of white corundum aggregate with the thickness of 1-3 mm;
35% of white corundum aggregate with the thickness of 0-1 mm;
325-mesh plate-shaped corundum powder material is 18 percent;
15% of pure aluminate cement and magnesium binder mixture; (the pure aluminate cement and the magnesium binder account for 7.5 percent respectively)
1% of a mixture of oxalic acid and sodium citrate (the oxalic acid and the sodium citrate respectively account for 0.5%);
1% of a mixture of silicon micropowder and carboxymethyl cellulose.
A steel ladle is used to spray repair the preparation method, according to the ratio strictly weigh 1-3mm and 0-1mm white corundum aggregate, pure aluminate cement and magnesium bond mixture, oxalic acid and sodium citrate mixture, silica micropowder and carboxymethyl cellulose mixture according to the above-mentioned proportion, mix and pack the shipment in the agitator; the steel ladle gunning material was detected to change linearly (%) at 1500 ℃ for 3 h: 0.49 percent; the compressive strength was 60.7MPa.
A gunning method of gunning material for a ladle comprises the following steps:
s1, pouring a proper amount of gunning mix into a special spraying machine during construction on a ladle construction site, and quickly mixing the gunning mix with water at a gunning mouth to form mortar with adhesiveness;
s2, uniformly spraying the mortar on a ladle molten pool brick, wherein the adhesion rate is 99.1%, the spraying thickness is 20-30mm, maintaining at normal temperature for 24 hours after the spraying is finished, and then baking the ladle, wherein the baking is generally as follows: the small fire is carried out for 12 hours at 140 ℃, the medium fire is carried out for 12 hours at 450 ℃ and the big fire is carried out for 12 hours at 800 ℃.
Comparative example 1
A normal gunning mix is composed of white corundum aggregate, white corundum fine powder, high-alumina cement and silicon micropowder, and is prepared by mixing and stirring the ingredients according to a certain proportion.
The service lives of the molten pool bricks obtained by testing the gunning mix prepared in the above examples 1-4 and the gunning mix prepared in the comparative example in a certain steel mill are shown in the following table.
According to the table, under the same working condition, when the common gunning mix is used, the service life of the molten pool just passes through a 150-furnace, and after the back-seam mix of the embodiments 1-4 is used, the whole service life of the molten pool reaches 160-171 furnaces, and the service life of the ladle molten pool using the four gunning mix is obviously prolonged compared with that of the ladle molten pool before.
In the description of the specification, reference to the description of "one embodiment," "an example," "a specific example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (10)
1. The gunning mix for the steel ladle is characterized by comprising the following raw materials in percentage by weight: 83 to 89 percent of aggregate, 10 to 15 percent of bonding agent, 0.5 to 1 percent of dispersant and 0.5 to 1 percent of additive; the aggregate consists of white corundum and tabular corundum fine powder; the white corundum is 1-3mm and 0-1mm aggregates, and the tabular corundum fine powder is 325-mesh tabular corundum fine powder.
2. The gunning mix for the steel ladle according to claim 1, wherein the mass ratio of 1-3mm white corundum aggregate to 0-1mm white corundum aggregate to 325-mesh tabular corundum powder is 1:1.17:0.6-0.8.
3. The gunning mix for the steel ladle according to claim 1, wherein the binder is one of pure aluminate cement, magnesium binder and silica sol.
4. The gunning mix for a ladle according to claim 1, wherein the binder is a mixture of pure aluminate cement and a magnesium binder; the mass ratio of the pure aluminate cement to the magnesium binder in the mixture of the pure aluminate cement and the magnesium binder is 1.
5. The gunning mix for a steel ladle according to claim 1, wherein the dispersant is one of oxalic acid, sodium citrate and sodium tripolyphosphate.
6. The gunning mix for the steel ladle according to claim 1, wherein the dispersant can be a mixture of oxalic acid and sodium citrate; the mass ratio of the oxalic acid to the sodium citrate in the mixture of the oxalic acid and the sodium citrate is 1.
7. The gunning mix for the ladle according to claim 1, wherein the additive is one of silica micropowder, bentonite and carboxymethyl cellulose.
8. The gunning mix for the steel ladle according to claim 1, wherein the additive can be a silicon micropowder carboxymethyl cellulose mixture; the mass ratio of the silicon micropowder carboxymethyl cellulose in the silicon micropowder carboxymethyl cellulose mixture is 1.
9. The gunning mix for the ladle according to claim 1, wherein the gunning mix for the ladle is prepared by a method comprising: weighing the aggregate, the binding agent, the dispersing agent and the additive according to the formula amount, and uniformly mixing in a stirrer to obtain the material.
10. A gunning method of a gunning material for a ladle according to any one of claims 1 to 9, comprising the steps of:
s1, pouring gunning mix into a spraying machine during construction on a ladle construction site, and quickly mixing the gunning mix with water at a nozzle to form mortar with adhesiveness;
s2, uniformly spraying the mortar on a ladle molten pool brick, wherein the spraying thickness is 20-30mm, maintaining at normal temperature for 24 hours after the spraying is finished, and then baking the ladle, wherein the baking is generally as follows: the small fire is carried out at 100-200 ℃ for 12 hours, the medium fire is carried out at 350-450 ℃ for 12 hours, and the large fire is carried out at 600-800 ℃ for 12 hours.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2370013A1 (en) * | 1976-11-06 | 1978-06-02 | Hoechst Ag | Refractory binder mixt. - contg. mono:aluminium phosphate mixed with chromium salt with stable fillers |
| FR2398167A1 (en) * | 1977-07-18 | 1979-02-16 | Lafarge Fondu Int | Strong room and strong box wall mfr. - using aluminous cement |
| US20050150430A1 (en) * | 2002-04-08 | 2005-07-14 | Florent Bourlier | Refractory material based on polycrystalline alumina |
| CN101935221A (en) * | 2010-08-24 | 2011-01-05 | 中钢集团洛阳耐火材料研究院有限公司 | Low apparent porosity corundum refractory castable |
| CN107805058A (en) * | 2017-11-01 | 2018-03-16 | 安徽马钢耐火材料有限公司 | A kind of ladle corundum bag bottom brick and preparation method thereof |
| CN108610027A (en) * | 2018-07-16 | 2018-10-02 | 武汉科技大学 | A kind of high-performance cement combination castable and preparation method thereof |
| CN113999028A (en) * | 2021-11-12 | 2022-02-01 | 瑞泰马钢新材料科技有限公司 | Aluminum back seam material for steel ladle and preparation method thereof |
-
2022
- 2022-07-27 CN CN202210890530.2A patent/CN115231906A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2370013A1 (en) * | 1976-11-06 | 1978-06-02 | Hoechst Ag | Refractory binder mixt. - contg. mono:aluminium phosphate mixed with chromium salt with stable fillers |
| FR2398167A1 (en) * | 1977-07-18 | 1979-02-16 | Lafarge Fondu Int | Strong room and strong box wall mfr. - using aluminous cement |
| US20050150430A1 (en) * | 2002-04-08 | 2005-07-14 | Florent Bourlier | Refractory material based on polycrystalline alumina |
| CN101935221A (en) * | 2010-08-24 | 2011-01-05 | 中钢集团洛阳耐火材料研究院有限公司 | Low apparent porosity corundum refractory castable |
| CN107805058A (en) * | 2017-11-01 | 2018-03-16 | 安徽马钢耐火材料有限公司 | A kind of ladle corundum bag bottom brick and preparation method thereof |
| CN108610027A (en) * | 2018-07-16 | 2018-10-02 | 武汉科技大学 | A kind of high-performance cement combination castable and preparation method thereof |
| CN113999028A (en) * | 2021-11-12 | 2022-02-01 | 瑞泰马钢新材料科技有限公司 | Aluminum back seam material for steel ladle and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 徐平坤等: "《刚玉耐火材料 第2版》", 30 June 2007, 冶金工业出版社 * |
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