CN109534831A - Half cylinder of steel permanent layer castable - Google Patents
Half cylinder of steel permanent layer castable Download PDFInfo
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- CN109534831A CN109534831A CN201811481758.6A CN201811481758A CN109534831A CN 109534831 A CN109534831 A CN 109534831A CN 201811481758 A CN201811481758 A CN 201811481758A CN 109534831 A CN109534831 A CN 109534831A
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- C—CHEMISTRY; METALLURGY
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B2235/00—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
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/00—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
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/528—Spheres
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
- C04B2235/9615—Linear firing shrinkage
Abstract
Half cylinder of steel permanent layer castable of the present invention includes: Al by weight percentage2O3>=60%, SiO2>=10%, CaO≤1%, water content≤1%.The blast furnace sow castable refractory that workability of the present invention is superior, heat storage capacity is strong, thermodynamic property is stable, the service life is high, it can be effectively controlled the problem of caused temperature drop and casting material strength are low, and crackle increases, expands after overhaul in the online transportational process of half cylinder of steel.The present invention is using flint clay, alumina hollow ball as main aggregate, using high-purity aluminum, siliceous, refractory cement as bonding agent, half cylinder of steel permanent layer castable is prepared using calgon as dispersing agent, the heat storage capacity of half cylinder of steel permanent layer can be effectively improved, thermal property, reduce extremely cold very hot caused cracking phenomena, service life rises appreciably, and has a good application prospect.
Description
Technical field
The present invention relates to technical field of blast furnace ironmaking, especially a kind of half cylinder of steel permanent layer castable.
Background technique
It is blast-melted after pretreatments such as " vanadium extractions " or " three de- " at half steel, half cylinder of steel as the carrier for holding half steel,
Often through building or pouring fireproof material protection ladle bowl is to realize the transport of half steel, refractory material be divided into permanent layer material and
Working layer, when double of cylinder of steel is transported since the temperature drop in transportational process will cause casting material strength reduction.Every warp
An overhaul is crossed, half cylinder of steel can replace one action layer, if strength reduction during changeing, can draw during tearing brick open permanent
Layer is fallen, since the resistance to material of permanent layer will form different phases in online use process, along with expansion or shrinkage, and each position
It can be cracked at the edge of phase, can cause to peel off on a large scale when serious, seriously affect use.
Summary of the invention
The technical problems to be solved by the present invention are: providing, a kind of workability is superior, heat storage capacity is strong, thermodynamic property
Stablize, the blast furnace sow castable refractory that the service life is high, can be effectively controlled caused temperature in the online transportational process of half cylinder of steel
The problem of drop and casting material strength are low, and crackle increases, expands after overhaul.
To solve above-mentioned technical problem the technical scheme adopted by the invention is that: half cylinder of steel permanent layer castable, chemistry
Ingredient includes: Al by weight percentage2O3>=60%, SiO2>=10%, CaO≤1%, water content≤1%.
Further, the raw material of the half cylinder of steel permanent layer castable includes: by weight percentage
Partial size be 5~10mm flint clay particle 20~22%,
Partial size be 3~5mm flint clay particle 15~17%,
Partial size be 1~3mm flint clay particle 10~12%,
Partial size be 0.074~1mm flint clay particle 10~12%,
Partial size be 1~3mm alumina hollow ball particle 2~4%,
Partial size be 0.2~1mm alumina hollow ball particle 2~4%,
Partial size be 0.074mm calcined bauxite in powder 22~24%,
Partial size be 0.005mm aluminium oxide powder 4~6%,
Partial size be 0.074mm calcium aluminate series cement 4~6%,
Partial size be 0.074mm silica dust powder 1~2%,
Calgon 0.1~0.3%,
Explosion-proof fiber 0.03~0.06%.
Further, in the raw material, the chemical composition comprises the following components in percentage by weight of each component includes:
Flint clay: Al2O3>=42%, SiO2>=52%；
Alumina hollow ball: Al2O3>=99%；
Calcined bauxite in powder: Al2O3>=85%；
Aluminium oxide powder: Al2O3>=98%；
Calcium aluminate series cement: Al2O3>=50%；
Silica dust powder: SiO2>=94%.
The beneficial effects of the present invention are: the present invention is using flint clay, alumina hollow ball as main aggregate, with raffinal
Matter, siliceous, refractory cement are bonding agent, and half cylinder of steel permanent layer castable is prepared using calgon as dispersing agent, can be had
Effect improves the heat storage capacity of half cylinder of steel permanent layer, thermal property, reduces extremely cold very hot caused cracking phenomena, and service life is obvious
Increase, has a good application prospect.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is further detailed below with reference to embodiment.
Half cylinder of steel permanent layer castable of the present invention, chemical composition comprises the following components in percentage by weight includes: Al2O3>=60%,
SiO2>=10%, CaO≤1%, water content≤1%.
In order to control granularity, ingredient and the water content of half cylinder of steel permanent layer castable, the present invention is by preparing half cylinder of steel
The raw material of permanent layer castable is controlled, and raw material includes: by weight percentage
Partial size be 5~10mm flint clay particle 20~22%,
Partial size be 3~5mm flint clay particle 15~17%,
Partial size be 1~3mm flint clay particle 10~12%,
Partial size be 0.074~1mm flint clay particle 10~12%,
Partial size be 1~3mm alumina hollow ball particle 2~4%,
Partial size be 0.2~1mm alumina hollow ball particle 2~4%,
Partial size be 0.074mm calcined bauxite in powder 22~24%,
Partial size be 0.005mm aluminium oxide powder 4~6%,
Partial size be 0.074mm calcium aluminate series cement 4~6%,
Partial size be 0.074mm silica dust powder 1~2%,
Calgon 0.1~0.3%,
Explosion-proof fiber 0.03~0.06%.
In above-mentioned raw materials, the chemical composition comprises the following components in percentage by weight of each component includes:
Flint clay: Al2O3>=42%, SiO2>=52%；Alumina hollow ball: Al2O3>=99%；Calcined bauxite in powder: Al2O3≥
85%；
Aluminium oxide powder: Al2O3>=98%；Calcium aluminate series cement: Al2O3>=50%；Silica dust powder: SiO2>=94%；
It is HG/T2837-1997 that calgon, which corresponds to national standard,；The corresponding trade mark of explosion-proof fiber is JX-3-3.
Half cylinder of steel permanent layer castable of the present invention is hollow using flint clay, aluminium oxide in the selection of raw material
Ball and calcined bauxite in powder provide Al2O3, SiO is provided using flint clay, silica dust powder2, it is strong that construction early period is provided using calcium aluminate series cement
Degree, serves as bonding agent using aluminium oxide powder and silica dust powder, provides mobile performance using calgon, enhances application property
Can, the transporting of vapor in baking process is promoted using explosion-proof fiber, reduces apparent porosity, and calcium aluminate is cooperated using explosion-proof fiber
Series cement increases initial flexural strength and medium temperature flexural strength.
In above-mentioned raw materials, flint clay has volume stability, intensity big and the characteristics such as water absorption rate is small after high-temperature calcination, but its
Bulk density is smaller.
Alumina hollow ball has purity is high, light, can be according to granularity and the heat storage capacity of profile adjustment castable.
In conjunction with above-mentioned aggregate respectively integrate excellent performance, it is well known that aggregate can excessively make castable poor fluidity, at
Type is poor, easy to crack；And aggregate is very few, and castable frame position can be made weak, so that high-temperature mechanical property is influenced, ordinary circumstance
Under, it is 65~70% more appropriate to account for product specific gravity for selected aggregate element, and the general proportion of refractory material micro mist be 30~
35%, what can be formed during adding water and stirring melts slurry, fills up the gap on particle periphery, and have certain fluidity convenient for casting
Construction.
The type selecting of powder is also extremely important, if fire resisting micro mist type selecting can not be similar or synchronous with particulate component, makes in casting
Cracking will be will appear with rear initial stage, mid-term, the problems such as associativity is poor.Calcined bauxite in powder, white alundum powder and aluminium oxide powder at
Divide predominantly Al2O3, effect is to react generation under the silica dust powder in castable and the silica high temperature in flint clay
Mullite phase, this mullite Xiang Weizhen column, can effectively prevent the infiltration of slag, while reduce the apparent porosity of castable,
Castable compressive resistance is improved, the resistance to flaking and thermal shock resistance of castable are improved.
Cement uses calcium aluminate series cement, wherein the water that can be used as the present invention use of the alumina content 70% or so
Mud, this kind of hydrated cementitious performance are stablized, mechanical strength, and strength enhancing is suitable, is suitable for half cylinder of steel permanent layer and pours
Material feeding provides construction intensity early period.In the present invention, cement used by applicant is specially to match card CA-70 aluminate cement,
Its alumina content has stable hydrating capacity 70% or so in the construction process, and strength enhancing is suitable and excellent
Mechanical strength the features such as.
Silica dust powder, aluminium oxide powder and calcined bauxite in powder have certain binding performance in hydration process simultaneously, are not necessarily to
Any bonding agent ingredient is added, that is, is able to satisfy construction casting and requires.Additive calgon is suitable for siliceous material, has
Certain dispersion performance can improve the self drainage of its castable.
Explosion-proof fiber is fiber fines shape substance, can be toasted through in each gap of castable in ladle tank
The discharge of transporting vapor in journey, avoids vapor that from can not being discharged, and explosion generates stomata.
Above-mentioned raw materials are weighed, are stirred, packs and obtains half cylinder of steel permanent layer castable of the present invention, it is former
The inspection result of material is as shown in table 1, and the physical and chemical index of preparation half cylinder of steel permanent layer castable of gained is as shown in table 2:
The test of table 1 half cylinder of steel permanent layer castable ingredient inspection result/%
The physical and chemical index of 2 half cylinder of steel permanent layer castable of table
Embodiment 1
Ingredient is carried out using composition of raw materials as shown in table 3, raw material takes after weighing, stirring, packaging after detection is qualified
Sample detection, physical and chemical index are as shown in table 4:
The used raw material proportioning of 3 embodiment of table 1
The Physico-chemical tests result of half cylinder of steel permanent layer castable obtained by 4 embodiment 1 of table
Using half cylinder of steel permanent layer castable as the half integrated poured material of cylinder of steel permanent layer fire resisting, this send embodiment 1
Toward 45 ton half of half cylinder of steel cold repair region cylinder of steel permanent layer castable, has collected 3 half cylinder of steels and distinguish the number after a whole overhaul
It is compared according to former castable overhaul data, 3 half cylinder of steel casting performances of test are better than former castable, the equal nothing in maintenance processes
It drops off, seminess occurs, and online access times are average to be increased to 940 times by original 853 times, online heat storage capacity in the process
It is presented as that steel shell humid test jar is 289 DEG C average, relatively 341 DEG C of tank of comparison, crackle number is presented as 2/m of test tank2, compare tank
3/m2, properties are superior to former castable.
Embodiment 2
Ingredient is carried out using composition of raw materials as shown in table 5, raw material takes after weighing, stirring, packaging after detection is qualified
Sample detection, physical and chemical index are as shown in table 6:
The used raw material proportioning of 5 embodiment of table 2
The Physico-chemical tests result of half cylinder of steel permanent layer castable obtained by 6 embodiment 2 of table
Using half cylinder of steel permanent layer castable as the half integrated poured material of cylinder of steel permanent layer fire resisting, this send embodiment 2
Toward 45 ton half of half cylinder of steel cold repair region cylinder of steel permanent layer castable, has collected 3 half cylinder of steels and distinguish the number after a whole overhaul
It is compared according to former castable overhaul data, 3 half cylinder of steel casting performances of test are better than former castable, the equal nothing in maintenance processes
It drops off, seminess occurs, and online access times are average to be increased to 882 times by original 809 times, online heat storage capacity in the process
It is presented as that steel shell humid test jar is 289 DEG C average, relatively 313 DEG C of tank of comparison, crackle number is presented as 2/m of test tank2, compare tank
3/m2, properties are superior to former castable.
Through the foregoing embodiment 1,2 content it is found that half cylinder of steel permanent layer castable of the present invention half cylinder of steel forever
Application and construction superior performance on long layer, thermal property is superior, service life rises appreciably, and can improve heat storage capacity, reduce pole
Cold very hot caused cracking phenomena, has a extensive future.
Claims (3)
1. half cylinder of steel permanent layer castable, it is characterised in that: its chemical composition comprises the following components in percentage by weight includes: Al2O3>=60%,
SiO2>=10%, CaO≤1%, water content≤1%.
2. half cylinder of steel permanent layer castable as described in claim 1, it is characterised in that: the half cylinder of steel permanent layer castable
Raw material includes: by weight percentage
Partial size be 5~10mm flint clay particle 20~22%,
Partial size be 3~5mm flint clay particle 15~17%,
Partial size be 1~3mm flint clay particle 10~12%,
Partial size be 0.074~1mm flint clay particle 10~12%,
Partial size be 1~3mm alumina hollow ball particle 2~4%,
Partial size be 0.2~1mm alumina hollow ball particle 2~4%,
Partial size be 0.074mm calcined bauxite in powder 22~24%,
Partial size be 0.005mm aluminium oxide powder 4~6%,
Partial size be 0.074mm calcium aluminate series cement 4~6%,
Partial size be 0.074mm silica dust powder 1~2%,
Calgon 0.1~0.3%,
Explosion-proof fiber 0.03~0.06%.
3. half cylinder of steel permanent layer castable as claimed in claim 2, it is characterised in that: in the raw material, the chemistry of each component
Ingredient includes: by weight percentage
Flint clay: Al2O3>=42%, SiO2>=52%；
Alumina hollow ball: Al2O3>=99%；
Calcined bauxite in powder: Al2O3>=85%；
Aluminium oxide powder: Al2O3>=98%；
Calcium aluminate series cement: Al2O3>=50%；
Silica dust powder: SiO2>=94%.
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| CN201811481758.6A CN109534831A (en) | 2018-12-05 | 2018-12-05 | Half cylinder of steel permanent layer castable |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981449A (en) * | 2019-12-17 | 2020-04-10 | 钢城集团凉山瑞海实业有限公司 | Steel ladle pocket brick thermal-state repairing material and preparation method thereof |
| CN111153708A (en) * | 2020-02-14 | 2020-05-15 | 辽宁科技大学 | Corundum-mullite multiphase gradient material for heat recovery coke oven door |
| CN112408998A (en) * | 2020-11-19 | 2021-02-26 | 浙江自立高温科技股份有限公司 | Ladle permanent layer castable |
| CN114213108A (en) * | 2021-12-31 | 2022-03-22 | 偃师中岳耐火材料有限公司 | Microporous lightweight castable for permanent lining of steel ladle and preparation method thereof |
| CN114478033A (en) * | 2022-01-06 | 2022-05-13 | 鞍山钢铁冶金炉材科技有限公司 | Long-life permanent lining castable for hot-metal bottle |
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| CN110981449A (en) * | 2019-12-17 | 2020-04-10 | 钢城集团凉山瑞海实业有限公司 | Steel ladle pocket brick thermal-state repairing material and preparation method thereof |
| CN111153708A (en) * | 2020-02-14 | 2020-05-15 | 辽宁科技大学 | Corundum-mullite multiphase gradient material for heat recovery coke oven door |
| CN111153708B (en) * | 2020-02-14 | 2022-07-08 | 辽宁科技大学 | Corundum-mullite multiphase gradient material for heat recovery coke oven door |
| CN112408998A (en) * | 2020-11-19 | 2021-02-26 | 浙江自立高温科技股份有限公司 | Ladle permanent layer castable |
| CN114213108A (en) * | 2021-12-31 | 2022-03-22 | 偃师中岳耐火材料有限公司 | Microporous lightweight castable for permanent lining of steel ladle and preparation method thereof |
| CN114478033A (en) * | 2022-01-06 | 2022-05-13 | 鞍山钢铁冶金炉材科技有限公司 | Long-life permanent lining castable for hot-metal bottle |
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Application publication date: 20190329 |