CN116283314A - Castable for swinging launder of blast furnace tapping channel and preparation method thereof - Google Patents
Castable for swinging launder of blast furnace tapping channel and preparation method thereof Download PDFInfo
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- CN116283314A CN116283314A CN202211593917.8A CN202211593917A CN116283314A CN 116283314 A CN116283314 A CN 116283314A CN 202211593917 A CN202211593917 A CN 202211593917A CN 116283314 A CN116283314 A CN 116283314A
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 58
- 239000002131 composite material Substances 0.000 claims abstract description 51
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 40
- 239000000654 additive Substances 0.000 claims abstract description 37
- 230000000996 additive effect Effects 0.000 claims abstract description 37
- 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 28
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052849 andalusite Inorganic materials 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 22
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims description 80
- 229910052593 corundum Inorganic materials 0.000 claims description 30
- 239000010431 corundum Substances 0.000 claims description 30
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 16
- 238000005266 casting Methods 0.000 claims description 15
- 239000000395 magnesium oxide Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 239000006229 carbon black Substances 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 229910021487 silica fume Inorganic materials 0.000 claims description 13
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 12
- 229910052863 mullite Inorganic materials 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 229920002748 Basalt fiber Polymers 0.000 claims description 7
- 229910001570 bauxite Inorganic materials 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 239000012784 inorganic fiber Substances 0.000 claims description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 229920000388 Polyphosphate Polymers 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000001205 polyphosphate Substances 0.000 claims description 4
- 235000011176 polyphosphates Nutrition 0.000 claims description 4
- 239000013590 bulk material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 230000008439 repair process Effects 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000035939 shock Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 239000011819 refractory material Substances 0.000 description 7
- 238000009991 scouring Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000004482 other powder Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001410 Microfiber Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003658 microfiber Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001590 oxidative effect 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
- 238000007789 sealing Methods 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The invention provides a castable for a blast furnace tapping channel swinging launder and a preparation method thereof, wherein the castable comprises the following components in parts by weight: 45-68 parts of high-alumina material, 10-18 parts of silicon carbide, 5-15 parts of andalusite, 2-4 parts of pure calcium aluminate cement, 0.1-0.3 part of dispersing agent and 10-20 parts of composite additive. The invention can solve the problems of low impact resistance, shorter service life than the main groove, frequent repair and replacement and the like of the conventional common swinging chute lining body.
Description
Technical Field
The invention relates to the technical field of unshaped refractory materials for ferrous metallurgy, in particular to a castable for a blast furnace swinging launder and a preparation method thereof.
Background
In the prior large and medium-sized blast furnace tapping channel system, a swinging chute is almost an indispensable molten iron circulation mechanism. Because the service environment of the swinging chute lining body is harsh, complex and changeable, the swinging chute is shorter than the service life of the main chute in most cases, the condition of hot repair and replacement after damage is common, the construction strength is increased, and the blast furnace tapping is unfavorable.
In the use environment of the swinging launder refractory material, the intermittent tapping mode enables the swinging launder refractory lining body to always have the circulating action of complex factors such as gravity scouring, shearing abrasion, high-temperature oxidation, abrupt temperature change and the like, so that the material at the position needs to have excellent impact toughness, wear resistance, oxidation resistance, thermal shock resistance and the like. The material used for the whole is a special refractory material which is more suitable for the swinging launder, so that a new material for the swinging launder is needed to be provided.
Disclosure of Invention
In view of the problems, the invention aims to provide a castable for a swinging launder of a blast furnace tapping channel and a preparation method thereof, so as to solve the problems of low impact resistance and corrosion loss performance, shorter service life than a main channel, frequent repair and replacement and the like of the conventional common swinging chute lining body.
The invention provides a castable for a blast furnace tapping channel swinging launder, which comprises the following components in parts by weight: 45-68 parts of high-alumina material, 10-18 parts of silicon carbide, 5-15 parts of andalusite, 2-4 parts of pure calcium aluminate cement, 0.1-0.3 part of dispersing agent and 10-20 parts of composite additive.
Furthermore, preferably, the high-alumina material comprises one or more of corundum materials or a combination of corundum materials and superfine bauxite chamotte; wherein, the liquid crystal display device comprises a liquid crystal display device,
the aggregate granularity of the corundum material is 10-5 mm, 5-3 mm, 3-1 mm or 1-0.088 mm;
the granularity of the fine powder of the corundum material is less than or equal to 0.074mm, and Al 2 O 3 Content of (3)>94.5％；
The granularity of the superfine bauxite chamotte is 10-5 mm, al 2 O 3 Content of (3)>88％。
Further, it is preferable that the silicon carbide has a particle size of 8 to 5mm, 5 to 3mm or 3 to 1mm, and the content of SiC is >97.5%.
In addition, the preferable scheme is that the granularity of andalusite is 5-3 mm, 3-1 mm or 1-0.088 mm, and the ore phase Al 2 O 3 ·SiO 2 Content of (3)>90％。
In addition, the pure calcium aluminate cement is preferably CA80 cement, wherein, al 2 O 3 Content of (3)>78％。
Further, it is preferable that the dispersant includes one or both of polyphosphate compound and polyethylene glycol-based polymer FS 20.
In addition, the preferable scheme is that the composite additive comprises the following components in parts by weight: 5 to 10 parts of alumina micropowder, 1 to 3 parts of silica fume, 0.2 to 1 part of nano carbon black powder, 0.5 to 1.5 parts of carbon-containing resin powder, 2 to 5 parts of Si-SiC composite powder, 0.2 to 1 part of magnesia powder and 0.05 to 0.1 part of high-temperature inorganic fiber,
particle size of the alumina micropowder<1μm，Al 2 O 3 Content of (3)>99.9％；
Particle size of the silica fume<0.15μm，SiO 2 The content of (3) is>95％；
The granularity of the nano carbon black powder is less than 30nm, the content of nano carbon is more than 98%, volatile matters are less than 1.5%, and ash content is less than 0.5%;
the granularity of the carbon-containing resin powder is less than 0.088mm, and the carbon content is more than 80%;
the granularity of the Si-SiC composite powder is less than 20 mu m, and the content of SiC is more than 60%;
the granularity of the magnesium oxide micro powder is less than 0.088mm, and the MgO content is more than 90%;
the high-temperature inorganic fiber comprises one or two of basalt fiber, chopped carbon fiber and mullite fiber, and the length-diameter ratio is 75:1.
The invention also provides a method for preparing the castable for the swing launder of the blast furnace tapping channel, which comprises the following steps:
mixing the components of the composite additive according to a preset proportion to form composite additive powder;
mixing and stirring the composite additive powder, a dispersing agent, pure calcium aluminate cement, a high-alumina material, silicon carbide and andalusite according to a preset proportion to form a mixed bulk material;
and screening the mixed bulk materials and treating the slurry to prepare the castable for the swing launder of the blast furnace tapping channel.
In addition, the method preferably further comprises the steps of, after preparing the castable for the swing launder of the blast furnace tapping channel: carrying out easiness inspection on the prepared castable for the swing launder of the blast furnace tapping channel;
and (5) bagging for standby after the inspection is qualified.
In addition, the preferable scheme is that a forced stirrer is adopted to mix and stir the composite additive powder with a dispersing agent, pure calcium aluminate cement, a high-alumina material, silicon carbide and andalusite according to a proportion.
According to the technical scheme, compared with the traditional swing chute refractory material, the castable for the swing chute of the blast furnace has better fluidity, stronger constructability and easy formation of a structure with good compactness; the groove lining body has high thermal strength, good anti-scouring property, strong impact toughness and fatigue damage resistance, excellent oxidation resistance and thermal shock resistance, and reduces the impact damage, shearing abrasion, thermal shock corrosion damage and oxidation medium chemical damage effects of molten iron on the swinging groove lining body; can greatly swing the launder to prolong the service life of the material, and is beneficial to the safe and smooth operation of the blast furnace molten iron production.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and attainments together with a more complete understanding of the invention will become apparent and appreciated by referring to the following description taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a schematic flow chart of a method for preparing castable for a blast furnace tapping channel swing launder according to an embodiment of the present invention.
The same reference numerals will be used throughout the drawings to refer to similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
Aiming at the problems that the conventional common swinging chute lining body is low in impact resistance and corrosion resistance, short in service life, frequent in repair and replacement and the like, the invention provides a castable for a swinging chute of a blast furnace tapping channel and a preparation method thereof.
The invention provides a castable for a blast furnace tapping channel swinging launder, which comprises the following components in parts by weight: 45-68 parts of high-alumina material, 10-18 parts of silicon carbide, 5-15 parts of andalusite, 2-4 parts of pure calcium aluminate cement, 0.1-0.3 part of dispersing agent and 10-20 parts of composite additive.
In the practice of the inventionIn an example, the high-aluminum material comprises one or more corundum materials or the combination of the corundum materials and superfine bauxite chamotte; wherein, the aggregate granularity of the corundum material is 10-5 mm, 5-3 mm, 3-1 mm or 1-0.088 mm; the granularity of fine powder of corundum material is less than or equal to 0.074mm, al 2 O 3 Content of (3)>94.5%; the granularity of the special-grade bauxite chamotte is 10-5 mm, al 2 O 3 Content of (3)>88％。
Wherein the granularity of the silicon carbide is 8-5 mm, 5-3 mm or 3-1 mm, and the content of SiC>97.5%. The granularity of the andalusite is 5-3 mm, 3-1 mm or 1-0.088 mm, and the ore phase Al 2 O 3 ·SiO 2 Content of (3)>90%. The pure calcium aluminate cement is CA80 cement, wherein Al 2 O 3 Content of (3)>78%. The dispersing agent comprises one or two of polyphosphate compounds and polyethylene glycol-based polymer FS 20.
In an embodiment of the present invention, the composite additive comprises the following components in parts by weight: 5 to 10 parts of alumina micropowder, 1 to 3 parts of silica fume, 0.2 to 1 part of nano carbon black powder, 0.5 to 1.5 parts of carbon-containing resin powder, 2 to 5 parts of Si-SiC composite powder, 0.2 to 1 part of magnesia powder and 0.05 to 0.1 part of high-temperature inorganic fiber, wherein the granularity of the alumina micropowder<1μm，Al 2 O 3 Content of (3)>99.9%; the granularity of the silica fume is<0.15μm，SiO 2 The content of (3) is>95%; particle size of the nano carbon black powder<30nm, content of nanocarbon>98%, volatile matter<1.5%, ash<0.5%; particle size of the carbonaceous resin powder<0.088mm, carbon content>80%; the granularity of the Si-SiC composite powder is<20 μm, siC content of>60 percent; the granularity of the magnesium oxide micro powder is<0.088mm, mgO content>90%; the high-temperature inorganic fiber comprises one or two of basalt fiber, chopped carbon fiber and mullite fiber, and the length-diameter ratio is 75:1.
In the embodiment of the invention, the adopted large-size superfine bauxite chamotte, corundum and andalusite aggregate improve the anti-scouring wear performance, chemical erosion performance, bonding strength among materials and thermal shock damage resistance of the castable. The original corundum phase, mullite phase, andalusite phase and new mullite phase generated by in-situ reaction in the aggregates have the difference of thermal expansion coefficients, so that the thermal shock damage resistance of the castable is improved, and the occurrence of thermal crack expansion and thermal spalling of the lining is reduced.
In-situ reaction sintering, secondary mullite formation and other processes of alumina micropowder, silica fume, andalusite and other matrix powder introduced by the castable to generate new-phase mullite; the introduced magnesium oxide micropowder reacts with the aluminum oxide micropowder under the high temperature condition to generate new-phase magnesia-alumina spinel. The production process of mullite and spinel ore phases with low thermal expansion coefficients is accompanied by volume expansion, so that not only is the bonding strength between matrix and particles and between matrixes reinforced, but also the compactness of the material is enhanced, and the thermal shock resistance, the molten iron scouring resistance and the overall structural stability of the lining body of the material are improved.
The carbon-containing resin powder in the castable disclosed by the invention has a heterogeneous graphitized structure, has good toughness, is softened and transferred into pores when heated, and is combined with the highly-dispersible nano carbon black powder to form a firmly-combined flexible carbon network structure in the material, so that the stress structure of the material when the material is subjected to thermal shock can be improved, and the generated impact force can be absorbed, and the strength and the spalling resistance after carbonization can be improved.
The C source material reacts with simple substance Si powder in the Si-SiC composite powder to generate beta-SiC microfiber, and the bridging and pinning effects of the beta-SiC microfiber are beneficial to preventing microcrack expansion; the high-temperature inorganic fibers are introduced, so that the impact fracture toughness of the bottom, the side wall and the spout part is improved, and the shearing abrasion, crack expansion, structural peeling damage and the like of the high-temperature molten iron to the areas can be effectively resisted.
The antioxidant Si-SiC composite powder introduced by the castable is superfine powder, has small granularity and high activity, is favorable for forming a sealing glaze thin layer under the oxidation action on the surface of the substrate, and a large number of tiny pore gaps are filled with new phases generated by in-situ reaction between the superfine powder; these reactions effectively block infiltration of the oxidizing medium, improving the overall oxidation resistance of the material.
The dispersing agent adopted by the invention comprises polyphosphate compounds and polyethylene glycol-based polymer FS20, has the effects of effectively deflocculating and efficiently reducing water, and cooperates with superfine powder with multimodal particle size distribution to reduce the total water adding amount, has excellent construction performance, improves the construction workability and construction efficiency of castable, and improves the organization property and the use effect of the material.
Compared with the traditional swing chute refractory material, the castable for the blast furnace swing chute has better fluidity, stronger constructability, good anti-scouring performance, strong impact toughness and fatigue damage resistance, good oxidation resistance and thermal shock resistance of the swing chute lining body in the tapping process, greatly prolonged service life, and improved construction strength and maintenance and replacement times.
The invention also provides a method for preparing the castable for the swing launder of the blast furnace tapping channel, wherein fig. 1 shows a flow of the method for preparing the castable for the swing launder of the blast furnace tapping channel according to an embodiment of the invention, and as shown in fig. 1, the method for preparing the castable for the swing launder of the blast furnace tapping channel comprises the following steps:
s110: mixing the components of the composite additive according to a preset proportion to form composite additive powder;
s120: mixing and stirring the composite additive powder, a dispersing agent, pure calcium aluminate cement, a high-alumina material, silicon carbide and andalusite according to a preset proportion to form a mixed bulk material;
s130: and screening the mixed bulk materials and treating the slurry to prepare the castable for the swing launder of the blast furnace tapping channel.
In addition, after the casting material for the swing launder of the blast furnace tapping channel is prepared, the casting material further comprises: carrying out easiness inspection on the prepared castable for the swing launder of the blast furnace tapping channel; and (5) bagging for standby after the inspection is qualified.
In the embodiment of the invention, a forced mixer is adopted to mix and stir the composite additive powder with a dispersing agent, pure calcium aluminate cement, a high-alumina material, silicon carbide and andalusite according to a proportion. During site construction, a proper amount of clean water is added for forced stirring, and uniform wet mixed materials with good workability are formed and then poured for use.
The following examples are given to illustrate the present invention in detail, but are not intended to limit the scope of the invention.
Example 1
The composite additive comprises the following components in parts by weight: 5 parts of alumina micropowder, 1 part of silica fume, 0.4 part of nano carbon black powder, 1.2 parts of carbon-containing resin powder, 2.14 parts of Si-SiC composite powder, 0.2 part of magnesia powder and 0.06 part of basalt fiber.
The casting material for the swing launder of the blast furnace tapping channel comprises the following components in parts by weight: 29 parts of superfine alumina, 12 parts of brown corundum, 10 parts of compact corundum, 10 parts of silicon carbide, 15 parts of andalusite, 10 parts of white corundum fine powder, 3.9 parts of pure calcium aluminate CA80 cement, 0.1 part of dispersing agent and 10 parts of composite additive.
The preparation method of the castable for the swing launder of the blast furnace tapping channel comprises the following steps: weighing and uniformly mixing the fine powder materials with determined proportions to obtain a composite additive; then pre-mixing with other powder, adding aggregate, mixing for 5-8 min by a forced mixer, checking, bagging after passing, forming bulk product, transporting to site, adding water, stirring and casting.
Example two
The composite additive comprises the following components in parts by weight: 5.5 parts of alumina micropowder, 1.4 parts of silica fume, 0.6 part of nano carbon black powder, 0.7 part of carbon-containing resin powder, 2.83 parts of Si-SiC composite powder, 0.4 part of magnesia powder, 0.04 part of basalt fiber and 0.03 part of mullite fiber.
The casting material for the swing launder of the blast furnace tapping channel comprises the following components in parts by weight: 28 parts of brown corundum aggregate, 23 parts of superfine alumina, 15 parts of silicon carbide, 13 parts of andalusite, 5.65 parts of white corundum fine powder, 3.7 parts of pure calcium aluminate CA80 cement, 0.15 part of dispersing agent and 11.5 parts of composite additive.
The preparation method of the castable for the swing launder of the blast furnace tapping channel comprises the following steps: weighing and uniformly mixing the fine powder materials with determined proportions to obtain a composite additive; then pre-mixing with other powder, adding aggregate, mixing for 5-8 min by a forced mixer, checking, bagging after passing, forming bulk product, transporting to site, adding water, stirring and casting.
Example III
The composite additive comprises the following components in parts by weight: 6.5 parts of alumina micropowder, 2 parts of silica fume, 0.8 part of nano carbon black powder, 0.9 part of carbon-containing resin powder, 2.42 parts of Si-SiC composite powder, 0.3 part of magnesia powder, 0.04 part of chopped carbon fiber and 0.04 part of mullite fiber.
The casting material for the swing launder of the blast furnace tapping channel comprises the following components in parts by weight: 35 parts of brown corundum aggregate, 17 parts of superfine alumina, 10 parts of silicon carbide, 15 parts of andalusite, 7.5 parts of white corundum fine powder, 2.35 parts of pure calcium aluminate CA80 cement, 0.15 part of dispersing agent and 13 parts of composite additive.
The preparation method of the castable for the swing launder of the blast furnace tapping channel comprises the following steps: weighing and uniformly mixing the fine powder materials with determined proportions to obtain a composite additive; then pre-mixing with other powder, adding aggregate, mixing for 5-8 min by a forced mixer, checking, bagging after passing, forming bulk product, transporting to site, adding water, stirring and casting.
Example IV
The composite additive comprises the following components in parts by weight: 7.5 parts of alumina micropowder, 1.8 parts of silica fume, 0.7 part of nano carbon black powder, 1 part of carbon-containing resin powder, 3.35 parts of Si-SiC composite powder, 0.6 part of magnesia powder and 0.05 part of chopped carbon fiber.
The casting material for the swing launder of the blast furnace tapping channel comprises the following components in parts by weight: 10 parts of compact corundum aggregate, 38 parts of brown corundum aggregate, 12 parts of silicon carbide, 14 parts of andalusite, 8 parts of white corundum fine powder, 2.8 parts of pure calcium aluminate CA80 cement, 0.2 part of dispersing agent and 15 parts of composite additive.
The preparation method of the castable for the swing launder of the blast furnace tapping channel comprises the following steps: weighing and uniformly mixing the fine powder materials with determined proportions to obtain a composite additive; then pre-mixing with other powder, adding aggregate, mixing for 5-8 min by a forced mixer, checking, bagging after passing, forming bulk product, transporting to site, adding water, stirring and casting.
Example five
The composite additive comprises the following components in parts by weight: 8.5 parts of alumina micropowder, 2.2 parts of silica fume, 0.9 part of nano carbon black powder, 1.3 parts of carbon-containing resin powder, 3.71 parts of Si-SiC composite powder, 0.8 part of magnesia powder, 0.06 part of basalt fiber and 0.03 part of mullite fiber.
The casting material for the swing launder of the blast furnace tapping channel comprises the following components in parts by weight: 25 parts of brown corundum, 20 parts of compact corundum, 15 parts of silicon carbide, 11 parts of andalusite, 8.25 parts of white corundum fine powder, 3 parts of pure calcium aluminate CA80 cement, 0.25 part of dispersing agent and 17.5 parts of composite additive.
The preparation method of the castable for the swing launder of the blast furnace tapping channel comprises the following steps: weighing and uniformly mixing the fine powder materials with determined proportions to obtain a composite additive; then pre-mixing with other powder, adding aggregate, mixing for 5-8 min by a forced mixer, checking, bagging after passing, forming bulk product, transporting to site, adding water, stirring and casting.
Example six
The composite additive comprises the following components in parts by weight: 9.5 parts of alumina micropowder, 2.6 parts of silica fume, 1 part of nano carbon black powder, 1.4 parts of carbon-containing resin powder, 4.5 parts of Si-SiC composite powder, 0.9 part of magnesia powder, 0.05 part of basalt fiber and 0.05 part of mullite fiber.
The casting material for the swing launder of the blast furnace tapping channel comprises the following components in parts by weight: 21 parts of brown corundum, 26 parts of compact corundum, 13 parts of silicon carbide, 8 parts of andalusite, 8.7 parts of white corundum fine powder, 3 parts of pure calcium aluminate CA80 cement, 0.3 part of dispersing agent and 20 parts of composite additive.
The preparation method of the castable for the swing launder of the blast furnace tapping channel comprises the following steps: weighing and uniformly mixing the fine powder materials with determined proportions to obtain a composite additive; then pre-mixing with other powder, adding aggregate, mixing for 5-8 min by a forced mixer, checking, bagging after passing, forming bulk product, transporting to site, adding water, stirring and casting.
The performance indexes and the use effects of the castable of the invention in examples 1 to 6 are compared with the performance indexes of the castable of the swing chute of the common blast furnace tapping channel, and the results are shown in table 1.
As can be seen from the table, the blast furnace tapping channel swinging chute castable has the advantages of high bonding strength, good anti-scouring performance, good thermal shock damage resistance, no occurrence of macroscopic cracks in the using process, good volume stability, less maintenance times in the whole using process, low labor intensity, greatly prolonged service life and high efficiency, and ensures tapping safety and smoothness.
According to the castable for the swing launder of the blast furnace tapping channel and the preparation method thereof, compared with the traditional refractory material for the swing launder, the castable for the blast furnace swing launder has better fluidity, stronger constructability and excellent anti-scouring performance, impact toughness, fatigue damage resistance, oxidation resistance and thermal shock resistance of the lining body of the swing launder in the tapping process, so that the environmental resistance of the material is improved without damage, and the overall service life of the swing launder is prolonged; the material can reduce the consumption of the whole refractory material, reduce the field operation intensity and difficulty, and is beneficial to the safe and smooth operation of blast furnace tapping.
The castable for the blast furnace tapping channel swing launder and the method of preparing the same according to the present invention are described above by way of example with reference to the accompanying drawings. However, it will be understood by those skilled in the art that various modifications may be made to the castable for the blast furnace runner swinging launder and the method of producing the same, as set forth in the above-described invention, without departing from the scope of the invention. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The castable for the swing launder of the blast furnace tapping channel is characterized by comprising the following components in parts by weight: 45-68 parts of high-alumina material, 10-18 parts of silicon carbide, 5-15 parts of andalusite, 2-4 parts of pure calcium aluminate cement, 0.1-0.3 part of dispersing agent and 10-20 parts of composite additive.
2. The castable for the swing launder of the blast furnace tapping channel according to claim 1, wherein,
the high-aluminum material comprises one or more corundum materials or the combination of the corundum materials and superfine bauxite chamotte; wherein, the liquid crystal display device comprises a liquid crystal display device,
the aggregate granularity of the corundum material is 10-5 mm, 5-3 mm, 3-1 mm or 1-0.088 mm;
the granularity of the fine powder of the corundum material is less than or equal to 0.074mm, and Al 2 O 3 Content of (3)>94.5％；
The granularity of the superfine bauxite chamotte is 10-5 mm, al 2 O 3 Content of (3)>88％。
3. The castable for the swing launder of the blast furnace tapping channel according to claim 1, wherein,
the granularity of the silicon carbide is 8-5 mm, 5-3 mm or 3-1 mm, and the content of SiC is more than 97.5%.
4. The castable for the swing launder of the blast furnace tapping channel according to claim 1, wherein,
the granularity of the andalusite is 5-3 mm, 3-1 mm or 1-0.088 mm, and the ore phase Al 2 O 3 ·SiO 2 Content of (3)>90％。
5. The castable for the swing launder of the blast furnace tapping channel according to claim 1, wherein,
the pure calcium aluminate cement is CA80 cement, wherein Al 2 O 3 Content of (3)>78％。
6. The castable for the swing launder of the blast furnace tapping channel according to claim 1, wherein,
the dispersing agent comprises one or two of polyphosphate compounds and polyethylene glycol-based polymer FS 20.
7. The castable for the swing launder of the blast furnace tapping channel according to claim 1, wherein,
the composite additive comprises the following components in parts by weight: 5 to 10 parts of alumina micropowder, 1 to 3 parts of silica fume, 0.2 to 1 part of nano carbon black powder, 0.5 to 1.5 parts of carbon-containing resin powder, 2 to 5 parts of Si-SiC composite powder, 0.2 to 1 part of magnesia powder and 0.05 to 0.1 part of high-temperature inorganic fiber,
particle size of the alumina micropowder<1μm，Al 2 O 3 Content of (3)>99.9％；
Particle size of the silica fume<0.15μm，SiO 2 The content of (3) is>95％；
The granularity of the nano carbon black powder is less than 30nm, the content of nano carbon is more than 98%, volatile matters are less than 1.5%, and ash content is less than 0.5%;
the granularity of the carbon-containing resin powder is less than 0.088mm, and the carbon content is more than 80%;
the granularity of the Si-SiC composite powder is less than 20 mu m, and the content of SiC is more than 60%;
the granularity of the magnesium oxide micro powder is less than 0.088mm, and the MgO content is more than 90%;
the high-temperature inorganic fiber comprises one or two of basalt fiber, chopped carbon fiber and mullite fiber, and the length-diameter ratio is 75:1.
8. A method for preparing the castable for the blast furnace runner swinging launder according to any one of claims 1 to 7, characterized by comprising:
mixing the components of the composite additive according to a preset proportion to form composite additive powder;
mixing and stirring the composite additive powder, a dispersing agent, pure calcium aluminate cement, a high-alumina material, silicon carbide and andalusite according to a preset proportion to form a mixed bulk material;
and screening the mixed bulk materials and treating the slurry to prepare the castable for the swing launder of the blast furnace tapping channel.
9. The method for producing a castable for a blast furnace runner oscillating launder according to claim 8, further comprising, after the producing of the castable for a blast furnace runner oscillating launder:
carrying out easiness inspection on the prepared castable for the swing launder of the blast furnace tapping channel;
and (5) bagging for standby after the inspection is qualified.
10. The method for casting a blast furnace runner swinging launder according to claim 8, wherein the composite additive powder is mixed and stirred with dispersant, pure calcium aluminate cement, high alumina material, silicon carbide and andalusite according to proportion by adopting a forced stirrer.
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