CN113603466A - Steel ladle aluminum magnesium refractory mortar for recycling refractory dust-absorbing powder and preparation method thereof - Google Patents
Steel ladle aluminum magnesium refractory mortar for recycling refractory dust-absorbing powder and preparation method thereof Download PDFInfo
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- CN113603466A CN113603466A CN202110958442.7A CN202110958442A CN113603466A CN 113603466 A CN113603466 A CN 113603466A CN 202110958442 A CN202110958442 A CN 202110958442A CN 113603466 A CN113603466 A CN 113603466A
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- aluminum magnesium
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 59
- 239000000843 powder Substances 0.000 title claims abstract description 59
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000004064 recycling Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 title abstract description 19
- 239000010959 steel Substances 0.000 title abstract description 19
- 239000000428 dust Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 239000010431 corundum Substances 0.000 claims abstract description 29
- 238000010521 absorption reaction Methods 0.000 claims abstract description 23
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 21
- 239000004014 plasticizer Substances 0.000 claims abstract description 21
- 239000003755 preservative agent Substances 0.000 claims abstract description 21
- 230000002335 preservative effect Effects 0.000 claims abstract description 21
- 239000010419 fine particle Substances 0.000 claims abstract description 18
- 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 13
- 238000007599 discharging Methods 0.000 claims abstract description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000011819 refractory material Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 5
- 229910052596 spinel Inorganic materials 0.000 claims description 5
- 239000011029 spinel Substances 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 4
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 4
- 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 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- 229920001353 Dextrin Polymers 0.000 claims description 3
- 239000004375 Dextrin Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 235000019425 dextrin Nutrition 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- 229920000388 Polyphosphate Polymers 0.000 claims description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 2
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 2
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 239000001205 polyphosphate Substances 0.000 claims description 2
- 235000011176 polyphosphates Nutrition 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims 3
- 235000014380 magnesium carbonate Nutrition 0.000 claims 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 35
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 22
- 239000011449 brick Substances 0.000 description 15
- 239000004927 clay Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 10
- 238000007670 refining Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052850 kyanite Inorganic materials 0.000 description 1
- 239000010443 kyanite Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000007306 turnover 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
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—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
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate or hypophosphite
-
- 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
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses ladle aluminum magnesium refractory mortar for recycling refractory dust absorption powder and a preparation method thereof. The steel ladle aluminum magnesium refractory mortar comprises the following raw materials in percentage by mass: 5.0-90.0 percent of refractory dust-absorbing powder, 5.0-30.0 percent of corundum fine particles with the granularity of 0.5-0.15mm, 2.0-20.0 percent of fused magnesia fine particles with the granularity of 0.5-0.15mm, 1.0-10.0 percent of corundum micro powder and/or alpha-type activated alumina micro powder, 0.5-5.0 percent of silicon micro powder, 0.1-1.5 percent of water reducing agent, 0.01-1.0 percent of plasticizer and 0.01-1.0 percent of preservative. The preparation method comprises the following steps: adding refractory dust-absorbing powder into a mixing mill, adding a water reducing agent, a plasticizer and a preservative, uniformly mixing, adding the rest raw materials, continuously uniformly mixing, and discharging to obtain the ladle aluminum magnesium refractory mortar.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to ladle aluminum magnesium refractory mortar for recycling refractory dust absorption powder and a preparation method thereof.
Background
With the development of external refining and continuous casting technologies and the increase of the demand of the market for clean steel, the steel-making technical equipment is large-sized, efficient and continuous casting, and is continuously developed for saving labor, saving energy and reducing consumption, the requirements on steel ladle smelting conditions are higher and higher, and the requirements on refractory materials for steel ladles are also higher. The ladle vacuum refining is a common refining mode in China and is also a refining mode which can cause the most serious erosion to ladle bricks, molten steel is refined in a vacuum environment, and the erosion of the molten steel to refractory materials is severe in the vacuumizing process. The brickwork joint of the bricked ladle can generate an exhaust channel, and the brickwork joint part is most easily washed and eroded. The analysis of the ladle brick residual on the off-line shows that the lowest part of the ladle brick residual thickness is the brick joint of the ladle brick, the effect of the common refractory mortar bearing molten steel scouring and steel slag erosion is worse in the refining environment, and the brick joint residual thickness is about 15-25mm lower than the ladle brick body residual thickness. In addition, the common refractory mortar has large water addition amount, uneven thickness of the constructed brick joints, generates shrinkage at high temperature, is difficult to fill the brick joints completely, and is easy to generate molten steel infiltration and steel clamping at the brick joints.
The patent specification with the publication number of CN112500137A discloses ladle anti-corrosion magnesia refractory mortar and a preparation method thereof, wherein the ladle anti-corrosion magnesia refractory mortar comprises the following preparation raw materials in parts by weight: 40-120 parts of fused magnesia, 1-15 parts of alumina micropowder, 0.5-8 parts of chromium oxide fine powder, 0.5-8 parts of zirconia fine powder, 0.5-8 parts of silicon carbide fine powder, 0.3-4 parts of boron carbide fine powder, 0.1-2 parts of dispersant and 0.1-2 parts of tackifier. The water accounting for 35 percent of the total weight of the mixture is added into the mixture, the ladle anti-erosion magnesia refractory mortar has good molten steel scouring resistance and steel slag erosion resistance, and can solve the problems of low residual thickness and steel inclusion at the brick joint part of the ladle in the VOD refining process.
The patent specification with the publication number of CN112408954A discloses a refractory mortar, which comprises the following raw materials in parts by weight: 30-80 parts of corundum fine powder; 5-25 parts of alumina micro powder; 0-15 parts of quartz powder; 0-15 parts of kyanite fine powder; 0-10% of clay; 0-2 parts of a plasticizer; 1-5 parts of a preservative; 5-20 of a binder. The refractory mortar has good service performance, can be stored for a long time, and is convenient for site construction.
With the increase of environmental awareness, dust collectors are arranged on various refractory raw materials and production places of manufacturers, and collect and separate dust on the production sites. For the collected dust-absorbing powder, the conventional dust-absorbing powder is treated in the following way:
1. because the dust absorption powder has relatively fine granularity, large water absorption capacity, poor moisture retention and large viscosity, when the dust absorption powder is used as fine powder or micro powder in a refractory material to be added, the adding proportion is very small, and the using amount is very limited.
2. The waste of refractory raw materials is large as the discharge of solid wastes.
Disclosure of Invention
Aiming at the technical problems and the defects in the field, the invention provides the ladle aluminum magnesium fire clay for recycling the dust absorption powder of the refractory material, solves the problem of hidden danger of brick joints in the use of the fire clay, and simultaneously reduces the waste of dust absorption powder discharged as solid waste by refractory material enterprises.
The ladle aluminum magnesium refractory mortar for recycling refractory dust-absorbing powder comprises the following raw materials in percentage by mass:
the refractory dust-absorbing powder is dust-absorbing powder cleaned by a refractory raw material crushing device and/or a refractory product production device dust collector, the granularity is below 0.1mm, and Al is2O3The content of the + MgO is more than or equal to 85.00 wt%;
the water reducing agent is one or a mixture of a plurality of polyphosphate, polycarboxylic acid and dispersed alumina high-efficiency water reducing agents in any proportion;
the plasticizer is one or more of carboxymethyl cellulose, yellow dextrin, carboxymethyl starch ether and starch;
the preservative is one or more of oxalic acid, citric acid, boric acid and calcium lignosulfonate;
the preparation method of the ladle aluminum magnesium refractory mortar comprises the following steps: adding refractory dust-absorbing powder into a mixing mill, adding a water reducing agent, a plasticizer and a preservative, uniformly mixing, adding the rest raw materials, continuously uniformly mixing, and discharging to obtain the ladle aluminum magnesium refractory mortar.
With the improvement of environmental protection consciousness, bag-type dust collectors are arranged in various refractory raw materials and production places of manufacturers, and the working mechanism of the bag-type dust collector is that dust smoke containing dust passes through a filtering material, and dust particles are filtered. The filtering material mainly collects coarse-grained dust under the action of inertial collision and collects fine-grained dust under the action of diffusion and screening. The dust layer of the filter material also has a certain filtering function.
Detecting the particle size of the dust absorption powder to be 0.1-3 mu m, wherein the particle size belongs to ultrafine powder in the refractory material. The dust absorption powder has the advantages of fine particles, good fluidity, good dispersibility, large specific surface area and high reaction activity. By utilizing the dispersion effect of the dust absorption powder, the construction water consumption of the refractory mortar can be reduced, and the construction performance of the refractory mortar is improved. The dust absorption powder can fill gaps and particle gaps in the building process, so that the building is compact, and the strength of building combination is improved; the dust-absorbing powder has large specific surface area, higher activity and convenient sintering, and can increase solid-phase combination by matching with proper quantity, so that the material has more chances of forming ceramic combination at lower temperature, the strength is improved, and the material is favorable for resisting the scouring and melting loss of molten steel slag, thereby prolonging the service life and ensuring the safe operation of the ladle.
The conventional dust absorption powder treatment mode is used for discharging solid wastes, and the waste of refractory raw materials is large. Because the dust absorption powder has relatively fine granularity, large water absorption capacity, poor moisture retention and large viscosity, and the conventional product has very small use proportion when using the dust absorption powder, the dust absorption powder is used by matching the water reducing agent, the plasticizer and the preservative of specific types, and the dust absorption powder, the water reducing agent, the plasticizer and the preservative are uniformly mixed in the preparation process, so that the dust absorption powder (which can be up to 90wt percent) can be added in a large proportion to be used for the converter steel ladle aluminum magnesium fire clay, the viscosity of the fire clay is improved by utilizing the small granularity of the dust absorption powder, the discharge of solid wastes is reduced, the utilization rate of the raw materials of the fire clay is improved, and the cost of the fire clay is reduced.
And secondly, because the dust absorption powder has relatively fine granularity, the dust absorption powder has high reaction activity, and is easy to react with magnesia to generate magnesia-alumina spinel under a high-temperature condition.
In addition, the conventional refractory mortar product has fine granularity, does not have particles as supporting aggregates of the refractory mortar, and has the phenomenon of uneven thickness when the refractory mortar is built.
Therefore, the preparation method of the ladle aluminum magnesium refractory mortar provided by the invention is simple and easy to implement, has low cost, and has excellent construction performance, bonding strength, high-temperature performance and erosion resistance.
The refractory raw material crushing equipment comprises various corundum, alumina, aluminum oxide and spinel raw material crushing equipment.
The refractory product production equipment comprises high-alumina, corundum and corundum spinel product production equipment.
Preferably, the corundum fine particles are one or a combination of several of brown corundum, white corundum and tabular corundum used as refractory materials.
Preferably, the ladle aluminum magnesium refractory mortar contains Al in corundum fine particles2O3The content is more than or equal to 95.00wt percent.
Preferably, the ladle aluminum magnesium refractory mortar has the fused magnesia fine particles produced by an electric melting method, and the volume density of the fused magnesia fine particles is more than or equal to 3.48g/cm3The MgO content is more than or equal to 97.50wt percent.
Preferably, the granularity of the corundum micropowder is less than or equal to 0.045mm, and the Al micropowder is made of aluminum, magnesium and aluminum2O3The content is more than or equal to 98.50wt percent.
Preferably, the grain size of the alpha-type activated alumina micropowder is 0.5-10 mu m, and Al is contained in the ladle aluminum magnesium refractory mortar2O3The content is more than or equal to 98.50wt percent.
Preferably, the steel ladle aluminum magnesium refractory mortar has the silicon micropowder granularity less than or equal to 1 mu m and SiO2The content is more than or equal to 92.00 wt%.
Preferably, the ladle aluminum magnesium refractory mortar comprises one or more of FS10, FS20, FS60, sodium tripolyphosphate and sodium hexametaphosphate.
As a general inventive concept, the invention also provides a preparation method of the ladle aluminum magnesium refractory mortar, which comprises the following steps: adding refractory dust-absorbing powder into a mixing mill, adding a water reducing agent, a plasticizer and a preservative, uniformly mixing, adding the rest raw materials, continuously uniformly mixing, and discharging to obtain the ladle aluminum magnesium refractory mortar.
Preferably, the preparation method comprises the step of adding the water reducing agent, the plasticizer and the preservative, and then mixing for 3-5 min.
Preferably, in the preparation method, the mixing time is 12-15 min after the other raw materials are added.
Compared with the prior art, the invention has the main advantages that: the refractory mortar can be added with up to 90 wt% of dust absorption powder reclaimed materials, so that the discharge of solid wastes is obviously reduced, the waste of refractory raw materials is reduced, and the raw material cost of the refractory mortar is reduced; meanwhile, corundum with specific granularity and fused magnesia fine particles are added into the refractory mortar, so that the fire clay at refractory brick seams is full, the use is stable, the brick seams are controllable, and the turnover safety performance of the steel ladle is improved.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
Example 1
The raw materials comprise the following components in percentage by weight: 45.0% of refractory dust-absorbing powder (Al)2O3The content of the corundum is more than or equal to 95.00 wt%, the granularity is 0.1-0mm), and 30.0% of tabular corundum fine particles (Al) with the granularity of 0.5-0.15mm2O3Content is more than or equal to 95.00wt percent, 14.0 percent of fused magnesia fine particles with the granularity of 0.5-0.15mm (volume density is more than or equal to 3.48 g/cm)3MgO content is more than or equal to 97.50wt percent, and 8 percent of corundum micro powder (Al) with granularity less than or equal to 0.045mm2O3More than or equal to 98.50wt percent and 1.5 percent of silicon micropowder (the granularity is less than or equal to 1 mu m, SiO)2The content is more than or equal to 92.00wt percent), 0.5 percent of water reducing agent sodium hexametaphosphate, 0.5 percent of plasticizer carboxymethyl cellulose and 0.5 percent of preservative citric acid.
A200-type mixing mill is adopted to mix 250 kg of materials at a time.
Firstly, adding the refractory dust-absorbing powder into a mixing and rolling machine, then adding the water reducing agent, the plasticizer and the preservative, mixing for 3 minutes, then adding the rest raw materials, continuously mixing for 15 minutes, discharging and packaging to obtain the ladle aluminum magnesium refractory mortar.
The water adding amount of the refractory mortar in construction is detected to be 22.0 wt%, the bonding rupture strength of 2.2MPa at 110 ℃ for 24h and the bonding rupture strength of 8.0MPa at 1500 ℃ for 3h, the construction performance of the refractory mortar is better, and the construction time can be more than 5 hours.
Comparative example 1
The difference from example 1 is only that the starting material composition is reduced by the addition of the aqueous reducing agent, and the rest is the same. The water adding amount of the fire clay for construction is detected to be 32.0 wt%, the bonding rupture strength of 110 ℃ multiplied by 24h is detected to be 1.0MPa, the bonding rupture strength of 1500 ℃ multiplied by 3h is detected to be 3.0MPa, the strength is obviously reduced, meanwhile, the material sense is dilute during the construction of the fire clay, the fire clay is not full in masonry brick joints during the construction, and potential safety hazards exist in the use of the fire clay.
Example 2
The raw materials comprise the following components in percentage by weight: 75.0% of refractory dust-absorbing powder (Al)2O3The content of (B) is more than or equal to 87.00 percent, the content of MgO is 10.00 weight percent, the granularity is 0.1-0mm), the granularity of 10.0 percent is 0.5-0.15mm white corundum fine particles (Al)2O3Content is more than or equal to 95.00wt percent, 5.5 percent of fused magnesia fine particles with the granularity of 0.5-0.15mm (volume density is more than or equal to 3.48 g/cm)3MgO content is more than or equal to 97.50wt percent, and 6 percent of corundum micro powder (Al) with granularity less than or equal to 0.045mm2O3Content is more than or equal to 98.50wt percent, 2 percent of silicon micropowder (granularity is less than or equal to 1 mu m, SiO)2Content is more than or equal to 92.00wt percent), 0.4 percent of water reducing agent sodium tripolyphosphate, 0.4 percent of water reducing agent sodium hexametaphosphate, 0.2 percent of plasticizer carboxymethyl cellulose, 0.1 percent of plasticizer starch and 0.4 percent of preservative citric acid.
A200-type mixing mill is adopted to mix 250 kg of materials at a time.
Firstly, adding the refractory dust-absorbing powder into a mixing and rolling machine, then adding the water reducing agent, the plasticizer and the preservative, mixing for 4 minutes, then adding the rest raw materials, continuously mixing for 13 minutes, discharging and packaging to obtain the ladle aluminum magnesium refractory mortar.
The water adding amount of the refractory mortar in construction is detected to be 25.0 wt%, the bonding rupture strength at 110 ℃ for 24h is detected to be 2.8MPa, the bonding rupture strength at 1500 ℃ for 3h is detected to be 6.5MPa, the construction performance of the refractory mortar is better, and the construction time can be more than 6 hours.
Comparative example 2
The difference from example 2 is only that the plasticizer addition is eliminated from the raw material composition, and the rest is the same. The water adding amount of the refractory mortar in construction is detected to be 26.0 wt%, the refractory mortar is precipitated and layered in the construction process, and the layered refractory mortar is sandy and non-viscous and cannot be constructed. The fire clay has potential safety hazard in use.
Example 3
The raw materials comprise the following components in percentage by weight: 85.0% of refractory dust-absorbing powder (Al)2O3The content of (A) is more than or equal to 90.00%, the content of MgO is 5.00%, the granularity is 0.1-0mm, and 7.0% of tabular corundum fine particles (Al) with the granularity of 0.5-0.15mm2O3Content is more than or equal to 95.00wt percent, 4.0 percent of fused magnesia fine particles with granularity of 0.5-0.15mm (volume density is more than or equal to 3.48 g/cm)3MgO content is more than or equal to 97.50wt percent, and 2 percent of corundum micro powder (Al) with granularity less than or equal to 0.045mm2O3Content is more than or equal to 98.50wt percent, 1 percent of silicon micropowder (granularity is less than or equal to 1 mu m, SiO)2Content not less than 92.00 wt%), 0.6% minusAqueous polycarboxylic acid, 0.2% of plasticizer yellow dextrin, 0.1% of preservative oxalic acid and 0.1% of preservative citric acid.
A200-type mixing mill is adopted to mix 250 kg of materials at a time.
Firstly, adding the refractory dust-absorbing powder into a mixing and rolling machine, then adding the water reducing agent, the plasticizer and the preservative, mixing for 5 minutes, then adding the rest raw materials, continuously mixing for 12 minutes, discharging and packaging to obtain the ladle aluminum magnesium refractory mortar.
The water adding amount of the refractory mortar in construction is detected to be 28.0 wt%, the bonding rupture strength at 110 ℃ for 24h is detected to be 3.2MPa, the bonding rupture strength at 1500 ℃ for 3h is detected to be 10.5MPa, the construction performance of the refractory mortar is better, and the construction time can be more than 8 hours.
Comparative example 3
The difference from example 3 is only that the preservative addition is eliminated in the raw material composition, and the rest is the same. The water adding amount of the refractory mortar in construction is detected to be 28.0 wt%, the construction time of the refractory mortar is about 0.5 hour, and the refractory mortar is hardened in the field construction process and cannot be used for construction.
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. The ladle aluminum magnesium refractory mortar for recycling refractory dust absorption powder is characterized by comprising the following raw materials in percentage by mass:
the refractory dust-absorbing powder is dust-absorbing powder cleaned by a refractory raw material crushing device and/or a refractory product production device dust collector, the granularity is below 0.1mm, and Al is2O3The content of the + MgO is more than or equal to 85.00 wt%;
the water reducing agent is one or a mixture of a plurality of polyphosphate, polycarboxylic acid and dispersed alumina high-efficiency water reducing agents in any proportion;
the plasticizer is one or more of carboxymethyl cellulose, yellow dextrin, carboxymethyl starch ether and starch;
the preservative is one or more of oxalic acid, citric acid, boric acid and calcium lignosulfonate;
the preparation method of the ladle aluminum magnesium refractory mortar comprises the following steps: adding refractory dust-absorbing powder into a mixing mill, adding a water reducing agent, a plasticizer and a preservative, uniformly mixing, adding the rest raw materials, continuously uniformly mixing, and discharging to obtain the ladle aluminum magnesium refractory mortar.
2. The ladle aluminum magnesium refractory mortar according to claim 1, wherein the refractory raw material crushing equipment comprises various corundum, alumina and spinel raw material crushing equipment;
the refractory product production equipment comprises high-alumina, corundum and corundum spinel product production equipment.
3. The ladle aluminum magnesium refractory mortar according to claim 1, wherein the corundum fine particles are one or a combination of several of brown corundum, white corundum and tabular corundum used as refractory materials;
al in the corundum fine particles2O3The content is more than or equal to 95.00wt percent.
4. The ladle aluminum magnesium refractory mortar of claim 1, wherein the fused magnesite fine particles are magnesite produced by an electric melting method, and the volume density of the fused magnesite fine particles is not less than 3.48g/cm3The MgO content is more than or equal to 97.50wt percent.
5. The ladle aluminum magnesium refractory mortar as recited in claim 1, wherein the corundum micropowder has a particle size of 0.045mm or less and Al2O3The content is more than or equal to 98.50wt percent.
6. The ladle aluminum magnesium refractory mortar as defined in claim 1, wherein the particle size of the alpha-type activated alumina micropowder is 0.5-10 μm, and Al is contained in the micropowder2O3The content is more than or equal to 98.50wt percent.
7. The ladle aluminum magnesium refractory mortar of claim 1, wherein the silica micropowder has a particle size of 1 μm or less and SiO2The content is more than or equal to 92.00 wt%.
8. The ladle aluminum magnesium refractory mortar of claim 1, wherein the water reducing agent is one or more of FS10, FS20, FS60, sodium tripolyphosphate and sodium hexametaphosphate.
9. The preparation method of the ladle aluminum magnesium refractory mortar according to any one of claims 1 to 8, comprising the following steps: adding refractory dust-absorbing powder into a mixing mill, adding a water reducing agent, a plasticizer and a preservative, uniformly mixing, adding the rest raw materials, continuously uniformly mixing, and discharging to obtain the ladle aluminum magnesium refractory mortar.
10. The preparation method of claim 9, wherein the water reducing agent, the plasticizer and the preservative are added and mixed for 3-5 min;
adding the rest raw materials and mixing for 12-15 min.
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| CN112408954A (en) * | 2020-11-03 | 2021-02-26 | 浙江自立高温科技股份有限公司 | Refractory mortar and preparation method thereof |
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| CN116354706A (en) * | 2023-03-09 | 2023-06-30 | 北京瑞普同创科技发展有限公司 | Aluminum-magnesium-chromium material fireclay and preparation method and application thereof |
| CN116354706B (en) * | 2023-03-09 | 2024-04-12 | 北京瑞普同创科技发展有限公司 | Aluminum-magnesium-chromium material fireclay and preparation method and application thereof |
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