CN111470853A - Magnesium gunning mix and application thereof - Google Patents
Magnesium gunning mix and application thereof Download PDFInfo
- Publication number
- CN111470853A CN111470853A CN202010225704.4A CN202010225704A CN111470853A CN 111470853 A CN111470853 A CN 111470853A CN 202010225704 A CN202010225704 A CN 202010225704A CN 111470853 A CN111470853 A CN 111470853A
- Authority
- CN
- China
- Prior art keywords
- parts
- less
- particle size
- silicon carbide
- gunning
- 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.)
- Granted
Links
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 239000011777 magnesium Substances 0.000 title claims abstract description 9
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 48
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims description 41
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 29
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 29
- 239000004568 cement Substances 0.000 claims description 17
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000001095 magnesium carbonate Substances 0.000 claims description 8
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 8
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 8
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 7
- 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 7
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004014 plasticizer Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 150000004645 aluminates Chemical class 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000701 coagulant Substances 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 abstract description 9
- 230000008439 repair process Effects 0.000 abstract description 7
- 238000005245 sintering Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- -1 CA-70 aluminate Chemical class 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007580 dry-mixing Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 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
- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
- C04B35/047—Refractories from grain sized mixtures containing chromium oxide or chrome ore
- C04B35/0473—Refractories from grain sized mixtures containing chromium oxide or chrome ore obtained from fused grains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away 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
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3218—Aluminium (oxy)hydroxides, e.g. boehmite, gibbsite, alumina sol
-
- 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
- C04B2235/30—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
- C04B2235/54—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
-
- 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
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D2001/1605—Repairing linings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention belongs to the field of refractory materials, and provides a magnesia gunning mix. The magnesium gunning mix provided by the invention is composed of components with specific compositions and contents, and can be tightly bonded with a furnace body refractory material due to the matching effect of the components, so that the bonding strength and the adhesion rate are improved. The invention also provides the application of the gunning material in furnace lining repair, and the magnesia gunning material has the advantages of good sintering compactness, high compressive strength and rupture strength, good thermal stability and obvious furnace repair effect at high temperature.
Description
Technical Field
The invention relates to the field of refractory material preparation, and particularly relates to a magnesium gunning mix and application thereof.
Background
The gunning material is an unshaped refractory material for gunning operation of a kiln lining, the aim of balanced erosion of the material is achieved by gunning the part which is damaged too early or falls off abnormally, and gunning maintenance is an important measure for prolonging the service life of a furnace lining and reducing the consumption of ton steel refractory material. However, the gunning materials in the prior art have the following problems: the spray repair process is difficult to sinter, the rebound rate is high, the consumption of refractory materials of the furnace lining and the service cycle are not obviously improved, and the problems are urgently to be solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a magnesium gunning material which is applied to furnace lining repair.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a magnesium gunning mix which comprises the following components in parts by weight: 80-95 parts of fused magnesia, 1-10 parts of silicon micropowder, 1-10 parts of silicon carbide, 0.5-1.5 parts of chromic anhydride, 0.5-1.5 parts of plasticizer, 1-5 parts of binder, 0.01-0.05 part of water reducer and 0.01-0.05 part of coagulant.
Preferably, the fused magnesia comprises the following components in parts by weight: 94.5 parts to 80 parts of fused magnesia and 96.3 parts to 15 parts of fused magnesia.
Preferably, the mass ratio of the component with the particle diameter of less than or equal to 0.044mm, the component with the particle diameter of more than 0.044mm and less than 1mm, the component with the particle diameter of more than or equal to 1mm and less than or equal to 3mm and the component with the particle diameter of more than 3mm and less than or equal to 5mm in the 94.5 electric melting magnesia is (1-2): (1.5-2.5): (3-4): (0.5 to 1).
Preferably, the 96.3 fused magnesia contains 5-15 wt% of components with the particle size of less than or equal to 0.074mm, and the balance is made up of components with the particle size of more than 0.074mm and less than or equal to 1 mm.
Preferably, the silicon carbide comprises the following components: the silicon carbide alloy comprises green silicon carbide and 97 silicon carbide, wherein the mass ratio of the green silicon carbide to the 97 silicon carbide is (3-5): (0.5 to 1.5).
Preferably, the plasticizer comprises lime mud and/or bentonite; the binding agent comprises one or more of aluminate cement, hydrated alumina and aluminum-silicon gel powder; the water reducing agent comprises sodium tripolyphosphate and/or sodium hexametaphosphate; the set accelerator is a cement hardening accelerator.
The invention also provides the application of the gunning material in repairing a furnace lining.
The invention provides a magnesia gunning mix. The magnesium gunning mix provided by the invention is composed of components with specific compositions and contents, and can be tightly bonded with a furnace body refractory material due to the matching effect of the components, so that the bonding strength and the adhesion rate are improved.
The invention also provides the application of the gunning material in furnace lining repair, and the magnesia gunning material has good sintering compactness, higher erosion resistance and slag resistance, good thermal stability and obvious furnace repair effect at high temperature.
Detailed Description
The invention provides a magnesium gunning mix which comprises the following components in parts by weight: 80-95 parts of fused magnesia, 1-10 parts of silicon micropowder, 1-10 parts of silicon carbide, 0.5-1.5 parts of chromic anhydride, 0.5-1.5 parts of plasticizer, 1-5 parts of binder, 0.01-0.05 part of water reducer and 0.01-0.05 part of coagulant.
In the present invention, the content of the fused magnesia is preferably 80 to 95 parts, and more preferably 88 to 92 parts.
In the invention, the fused magnesia preferably comprises the following components in parts by mass: 75-80 parts of 94.5 parts of fused magnesite, 5-15 parts of 96.3 parts of fused magnesite, more preferably 77-78 parts of 94.5 parts of fused magnesite and 11-14 parts of 96.3 parts of fused magnesite.
In the present invention, the mass ratio of the component having a particle size of 0.044mm or less, the component having a particle size of 0.044mm or more and 1mm or less, the component having a particle size of 1mm or more and 3mm or less, and the component having a particle size of 3mm or more and 5mm or less in the 94.5 fused magnesia is preferably (1 to 2): (1.5-2.5): (3-4): (0.5 to 1), and more preferably (1.25 to 1.75): (1.75-2.25): (3.25-3.75): (0.6-0.8). The invention leads the materials to be tightly packed through the continuous gradation among the fused magnesia to achieve the optimal volume density.
In the present invention, the MgO content in the 94.5 fused magnesite is preferably greater than 90%, and more preferably greater than 92%.
In the invention, the components with the particle size of less than or equal to 0.074mm in the 96.3 fused magnesia are preferably 5-15 wt%, and more preferably 8-12 wt%; the balance is made up by the components with the grain diameter of more than 0.074mm and less than or equal to 1 mm.
In the present invention, the content of the fine silica powder is 1 to 10 parts, and more preferably 4 to 7 parts.
In the present invention, the content of the silicon carbide is 1 to 10 parts, and more preferably 3 to 8 parts.
In the present invention, the silicon carbide preferably contains the following components: green silicon carbide and 97 silicon carbide, the preferred mass ratio of green silicon carbide and 97 silicon carbide is (3 ~ 5): (0.5 to 1.5), more preferably (3.5 to 4.5): (0.8 to 1.2).
In the present invention, the content of chromic anhydride is 0.5 to 1.5 parts, and more preferably 0.8 to 1.2 parts.
In the present invention, the content of the plasticizer is 0.5 to 1.5 parts, and more preferably 0.6 to 1.4 parts.
In the present invention, the plasticizer is preferably white mud and/or bentonite.
In the present invention, the content of the binder is 1 to 5 parts, and more preferably 2 to 4 parts.
The binding agent is preferably one or more of aluminate cement, hydrated alumina and aluminum-silicon gel powder, and the aluminate cement is preferably CA-70 aluminate cement.
In the present invention, the content of the water reducing agent is 0.01 to 0.05 part, and more preferably 0.02 to 0.04 part.
The water reducing agent is preferably sodium tripolyphosphate and/or sodium hexametaphosphate;
in the present invention, the content of the accelerator is 0.01 to 0.05 part, and more preferably 0.02 to 0.04 part.
The set accelerator is preferably a cement hardening accelerator, which is a commercially available cement hardening accelerator well known to those skilled in the art.
The invention also provides the application of the gunning material in repairing a furnace lining.
The invention also provides a method for preparing a refractory material by the gunning material, which preferably comprises the following steps:
(1) dry-mixing the components to obtain a dry mixture;
(2) mixing the dry mixture with water to obtain a wet mixture;
(3) molding the obtained wet material to obtain a molding material;
(4) and drying or sintering the obtained molding material to obtain the refractory material.
In the invention, the dry mixing time of the dry mixing is preferably 1-5 min, and more preferably 2-4 min; the mass of the water is preferably 3-7 wt% of the dry mixture, and more preferably 4-6 wt%.
In the present invention, the molding is preferably vibration molding; the no-load amplitude of the vibration forming is preferably 0.3-0.46 mm, and more preferably 0.35-0.4 mm; the vibration frequency of the vibration molding is preferably 140-180 Hz, and more preferably 150-170 Hz.
In the invention, the drying is preferably oven drying, and the drying temperature is preferably 90-130 ℃, and more preferably 100-120 ℃. The drying time is preferably 22-26 hours, and more preferably 23-25 hours.
In the invention, the sintering temperature is preferably 1400-1600 ℃, and is further preferably 1450-1550 ℃; the sintering time is preferably 2-4 h, and more preferably 2.5-3.5 h.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
A magnesia gunning mix. According to the mass parts, the cement hardening accelerator comprises, by weight, 15 parts of 94.5 fused magnesia with the particle size of less than or equal to 0.044mm, 20 parts of 94.5 fused magnesia with the particle size of more than 0.044mm and less than 1mm, 34 parts of 94.5 fused magnesia with the particle size of more than or equal to 1mm and less than or equal to 3mm, 7 parts of 94.5 fused magnesia with the particle size of more than 3mm and less than or equal to 5mm, 2 parts of 96.3 fused magnesia with the particle size of less than or equal to 0.074mm, 11.5 parts of 96.3 fused magnesia with the particle size of more than 0.074mm and less than or equal to 1mm, 2.45 parts of CA-70 aluminate cement, 4.5 parts of silica micropowder, 8 parts of green silicon carbide, 1 part of chromic anhydride, 1 part of Guangxi white mud, 2 parts of 97 silicon carbide, 0.03 part of sodium hexametaphosphate and 0.02 part.
Example 2
A magnesia gunning mix. According to the mass parts, 17 parts of 94.5 fused magnesia with the particle size of less than or equal to 0.044mm, 20 parts of 94.5 fused magnesia with the particle size of more than 0.044mm and less than 1mm, 33 parts of 94.5 fused magnesia with the particle size of more than or equal to 1mm and less than or equal to 3mm, 7 parts of 94.5 fused magnesia with the particle size of more than 3mm and less than or equal to 5mm, 1 part of 96.3 fused magnesia with the particle size of less than or equal to 0.074mm, 9 parts of 96.3 fused magnesia with the particle size of more than 0.074mm and less than or equal to 1mm, 2.45 parts of CA-70 aluminate cement, 4.5 parts of silicon micropowder, 4 parts of green silicon carbide, 1 part of chromic anhydride, 1 part of Guangxi white mud, 1 part of 97 silicon carbide, 0.03 part of sodium hexametaphosphate and 0.02 part of cement hardening accelerator.
Example 3
A magnesia gunning mix. By mass, 15 parts of 94.5 fused magnesia with the particle size of less than or equal to 0.044mm, 20 parts of 94.5 fused magnesia with the particle size of more than 0.044mm and less than 1mm, 35 parts of 94.5 fused magnesia with the particle size of more than or equal to 1mm and less than or equal to 3mm, 7 parts of 94.5 fused magnesia with the particle size of more than 3mm and less than or equal to 5mm, 1 part of 96.3 fused magnesia with the particle size of less than or equal to 0.074mm, 9 parts of 96.3 fused magnesia with the particle size of more than 0.074mm and less than or equal to 1mm, 2.45 parts of CA-70 aluminate cement, 4 parts of silicon micropowder, 4.5 parts of green silicon carbide, 1 part of chromic anhydride, 1 part of Guangxi white mud, 1 part of 97 silicon carbide, 0.03 part of sodium hexametaphosphate and 0.02 part of cement hardening accelerator.
Example 4
A magnesia gunning mix. 13 parts of 94.5 fused magnesia with the particle size of less than or equal to 0.044mm, 20 parts of 94.5 fused magnesia with the particle size of more than 0.044mm and less than 1mm, 35 parts of 94.5 fused magnesia with the particle size of more than or equal to 1mm and less than or equal to 3mm, 9 parts of 94.5 fused magnesia with the particle size of more than 3mm and less than or equal to 5mm, 1 part of 96.3 fused magnesia with the particle size of less than or equal to 0.074mm, 8.5 parts of 96.3 fused magnesia with the particle size of more than 0.074mm and less than or equal to 1mm, 2.45 parts of CA-70 aluminate cement, 4.5 parts of silicon micropowder, 4 parts of green silicon carbide, 1 part of chromic anhydride, 1 part of Guangxi white mud, 1 part of 97 silicon carbide, 0.03 part of sodium hexametaphosphate and 0.02 part of cement hardening accelerator.
Application example 1
The raw materials in the example 1 are mixed according to the set proportion and the grain size gradation, are dry-mixed for 3 minutes, are added with water accounting for 5.2 percent of the total weight of the gunning mix and are stirred for 5 minutes, are vibrated and cast by a vibrator (the no-load amplitude is 0.38 mm, the vibration frequency is 157Hz) to form a standard strip sample of 40mm × 40mm × 160mm, and are demolded after natural curing for 24 hours.
The samples were randomly divided into two portions, one portion was dried in an oven at 110 ℃ for 24h, the other portion was sintered at 1500 ℃ for 3h, and the two samples were tested.
The test results are reported in table 1.
Application example 2
The application example adopts the component proportion of the example 2, and the molding and the testing are carried out according to the process of the application example 1.
The test results are reported in table 1.
Application example 3
The application example adopts the component proportion of the example 3, and the molding and the testing are carried out according to the process of the application example 1.
The test results are reported in table 1.
Application example 4
The application example adopts the component proportion of the example 4, and the molding and the testing are carried out according to the process of the application example 1.
The test results are reported in table 1.
TABLE 1
According to the embodiments, the gunning material provided by the invention can effectively repair the furnace lining, improves the compressive strength and the rupture strength, and can be effectively attached to the furnace lining.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The magnesium gunning mix is characterized by comprising the following components in parts by mass: 80-95 parts of fused magnesia, 1-10 parts of silicon micropowder, 1-10 parts of silicon carbide, 0.5-1.5 parts of chromic anhydride, 0.5-1.5 parts of plasticizer, 1-5 parts of binder, 0.01-0.05 part of water reducer and 0.01-0.05 part of coagulant.
2. The gunning mix of claim 1, wherein the fused magnesite clinker comprises the following components in parts by mass: 94.5 parts to 80 parts of fused magnesia and 96.3 parts to 15 parts of fused magnesia.
3. The gunning mix according to claim 2, wherein the 94.5 fused magnesite has a mass ratio of a component with a particle size of 0.044mm or less, a component with a particle size of more than 0.044mm and less than 1mm, a component with a particle size of 1mm or more and 3mm or less, and a component with a particle size of more than 3mm and 5mm or less of (1-2): (1.5-2.5): (3-4): (0.5 to 1).
4. The gunning mix according to claim 2, wherein the 96.3 fused magnesite comprises 5 to 15 wt% of components with a particle size of 0.074mm or less, and the balance is made up of components with a particle size of 0.074mm or more and 1mm or less.
5. The gunning mix of claim 1, wherein the silicon carbide comprises the following components: the silicon carbide alloy comprises green silicon carbide and 97 silicon carbide, wherein the mass ratio of the green silicon carbide to the 97 silicon carbide is (3-5): (0.5 to 1.5).
6. The gunning mix according to any one of claims 1 to 5, wherein the plastifier comprises white mud and/or bentonite; the binding agent comprises one or more of aluminate cement, hydrated alumina and aluminum-silicon gel powder; the water reducing agent comprises sodium tripolyphosphate and/or sodium hexametaphosphate; the set accelerator is a cement hardening accelerator.
7. Use of a gunning material according to any one of claims 1 to 6 in repairing a furnace lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225704.4A CN111470853B (en) | 2020-03-26 | 2020-03-26 | Magnesium gunning mix and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225704.4A CN111470853B (en) | 2020-03-26 | 2020-03-26 | Magnesium gunning mix and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111470853A true CN111470853A (en) | 2020-07-31 |
| CN111470853B CN111470853B (en) | 2022-06-17 |
Family
ID=71749324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010225704.4A Active CN111470853B (en) | 2020-03-26 | 2020-03-26 | Magnesium gunning mix and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111470853B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032351A (en) * | 1987-09-29 | 1989-04-12 | 冶金部鞍山热能研究所 | Magnesite refractory wedding agent and using method thereof |
| CN101113101A (en) * | 2007-06-30 | 2008-01-30 | 河南省新密市荣耀炉料有限公司 | Magnesium gunning refractory for copper smelting-furnace |
| CN102030550A (en) * | 2010-11-03 | 2011-04-27 | 通达耐火技术股份有限公司 | Homogeneous material-containing corundum-mullite high-strength abrasion-resisting plastic |
| CN105859314A (en) * | 2016-06-06 | 2016-08-17 | 浙江自立高温科技有限公司 | Carbon-containing gunning mix for liquid steel smelting equipment and preparation method thereof |
| US20160297003A1 (en) * | 2013-03-21 | 2016-10-13 | Krosakiharima Corporation | Refractory material and casting nozzle |
| CN110451934A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of Large face repair material of converter |
-
2020
- 2020-03-26 CN CN202010225704.4A patent/CN111470853B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032351A (en) * | 1987-09-29 | 1989-04-12 | 冶金部鞍山热能研究所 | Magnesite refractory wedding agent and using method thereof |
| CN101113101A (en) * | 2007-06-30 | 2008-01-30 | 河南省新密市荣耀炉料有限公司 | Magnesium gunning refractory for copper smelting-furnace |
| CN102030550A (en) * | 2010-11-03 | 2011-04-27 | 通达耐火技术股份有限公司 | Homogeneous material-containing corundum-mullite high-strength abrasion-resisting plastic |
| US20160297003A1 (en) * | 2013-03-21 | 2016-10-13 | Krosakiharima Corporation | Refractory material and casting nozzle |
| CN105859314A (en) * | 2016-06-06 | 2016-08-17 | 浙江自立高温科技有限公司 | Carbon-containing gunning mix for liquid steel smelting equipment and preparation method thereof |
| CN110451934A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of Large face repair material of converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111470853B (en) | 2022-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2006317007B2 (en) | Refractory brick | |
| CN112456974B (en) | Magnalium spinel brick for co-processing cement kiln and preparation method and application thereof | |
| CN106588059B (en) | Prefabricated member for lime rotary kiln and preparation method thereof | |
| CN105645977A (en) | Air brick for special steel refining and preparation method thereof | |
| CN101921128A (en) | Pouring material for lime rotary kiln | |
| CN112679201B (en) | Cement-free aluminum-magnesium-chromium castable taking aluminum-chromium slag as main raw material and preparation method and application thereof | |
| CN105693259A (en) | Preparation technique of corundum spinel solid solution refractory material | |
| CN114195529B (en) | High-strength magnesia refractory mortar for refining ladle | |
| CN113233908A (en) | Regenerated carbon-free brick and preparation method thereof | |
| CN1050591C (en) | Fired microporous carbon-aluminium brick | |
| CN107140956B (en) | A kind of firing high-alumina refractory brick and preparation method thereof | |
| CN112479693A (en) | High-strength thermal shock-resistant wear-resistant silicon mullite brick and production process thereof | |
| Zawrah | Effect of zircon additions on low and ultra-low cement alumina and bauxite castables | |
| CN114477976A (en) | Cementing material for steel ladle and preparation method thereof | |
| CN110386808A (en) | A kind of resistance to erosion AluminaSpinel Bricks and preparation method thereof | |
| CN106830955A (en) | A kind of microwave drying prepares the method for not burning modified high-purity magnesium-aluminum spinel composite brick | |
| CN107010965B (en) | Quick-hardening type blast furnace hearth repairing material and preparation method thereof | |
| CN111470853B (en) | Magnesium gunning mix and application thereof | |
| CN109336626B (en) | Magnesium castable with forsterite as main raw material and preparation method thereof | |
| CN113636830B (en) | Self-flowing castable containing recycled corundum castable and preparation method thereof | |
| CN109608174A (en) | It can hydrated alumina combined corundum-spinel pouring material and preparation method thereof | |
| CN113683426A (en) | Baking-free high-strength metal ceramic composite material and preparation method and application thereof | |
| ITMI950206A1 (en) | REFRACTORY CERAMIC MASS AND ITS USE | |
| CN116396063B (en) | 99 castable for resisting copper liquid erosion and peeling in low-oxygen copper rod production | |
| CN116217210B (en) | Repairing material for steel ladle and preparation method thereof |
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 |