CN116871472B - Aluminum-containing middle rolling plate covering slag - Google Patents
Aluminum-containing middle rolling plate covering slag Download PDFInfo
- Publication number
- CN116871472B CN116871472B CN202310861742.2A CN202310861742A CN116871472B CN 116871472 B CN116871472 B CN 116871472B CN 202310861742 A CN202310861742 A CN 202310861742A CN 116871472 B CN116871472 B CN 116871472B
- Authority
- CN
- China
- Prior art keywords
- aluminum
- sio
- slag
- covering slag
- containing middle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002893 slag Substances 0.000 title claims abstract description 101
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 80
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000005096 rolling process Methods 0.000 title claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 35
- 238000002844 melting Methods 0.000 claims abstract description 31
- 230000008018 melting Effects 0.000 claims abstract description 31
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 27
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 25
- 230000004907 flux Effects 0.000 claims abstract description 21
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 17
- 229910018068 Li 2 O Inorganic materials 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 46
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 33
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 30
- 239000000395 magnesium oxide Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 25
- 239000010439 graphite Substances 0.000 claims description 24
- 229910002804 graphite Inorganic materials 0.000 claims description 24
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 20
- 239000010436 fluorite Substances 0.000 claims description 20
- 239000011734 sodium Substances 0.000 claims description 17
- 229910001610 cryolite Inorganic materials 0.000 claims description 15
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 15
- 235000013024 sodium fluoride Nutrition 0.000 claims description 15
- 239000011775 sodium fluoride Substances 0.000 claims description 15
- 239000011230 binding agent Substances 0.000 claims description 14
- 229910001570 bauxite Inorganic materials 0.000 claims description 13
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006229 carbon black Substances 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 12
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 12
- 239000008188 pellet Substances 0.000 claims description 12
- 239000010456 wollastonite Substances 0.000 claims description 12
- 229910052882 wollastonite Inorganic materials 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 7
- 229920001353 Dextrin Polymers 0.000 claims description 2
- 239000004375 Dextrin Substances 0.000 claims description 2
- 229920000881 Modified starch Polymers 0.000 claims description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000019425 dextrin Nutrition 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005058 metal casting Methods 0.000 abstract description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 52
- 239000007921 spray Substances 0.000 description 33
- 238000005266 casting Methods 0.000 description 20
- 239000011268 mixed slurry Substances 0.000 description 20
- 238000003756 stirring Methods 0.000 description 20
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 18
- 239000000843 powder Substances 0.000 description 14
- 235000017550 sodium carbonate Nutrition 0.000 description 14
- 239000000126 substance Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 238000005469 granulation Methods 0.000 description 12
- 230000003179 granulation Effects 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 11
- 238000012216 screening Methods 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 10
- 241000872198 Serjania polyphylla Species 0.000 description 10
- 239000011737 fluorine Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 10
- 230000000704 physical effect Effects 0.000 description 10
- 239000002002 slurry Substances 0.000 description 10
- 230000003068 static effect Effects 0.000 description 10
- 238000004448 titration Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000009749 continuous casting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010434 nepheline Substances 0.000 description 2
- 229910052664 nepheline Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010443 kyanite Substances 0.000 description 1
- 229910052850 kyanite Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to the technical field of metal casting, and particularly discloses an aluminum-containing middle coilAnd (5) plate covering slag. The aluminum-containing middle rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：24.0％～30.0％，CaO：33.0％～38.0％，MgO：1.0％～4.0％，Al 2 O 3 ：4.0％～8.0％，C：4.0％～6.0％，Na 2 O：6.0％～11.0％，F ‑ ：6.0％～9.0％，Li 2 O：0.8％～2.2％，Fe 2 O 3 Less than or equal to 1.0 percent, and the balance being unavoidable impurities; the viscosity of the aluminum-containing middle rolling plate covering slag is 0.07 Pa.S-0.09 Pa.S at 1300 ℃. The mold flux provided by the invention has lower melting point viscosity, larger radian of a viscosity turning curve and good process adaptability.
Description
Technical Field
The invention relates to the technical field of metal casting, in particular to a coil covering slag in aluminum-containing middle coils.
Background
With the development of continuous casting technology, the aluminum-containing middle-rolled plate casting powder is paid more attention to by steel mills. The aluminum-containing middle rolling plate generally comprises ship plate steel, bridge steel, 45# steel, 35CrMo and the like, and the steel comprises the following main components in percentage by mass: c is less than or equal to 0.04%, si is less than or equal to 0.02%, mn:0.15 to 0.20 percent, alt:0.01 to 0.06 percent, mn/S is more than or equal to 15, the steel has certain crack sensitivity, and the slab has faster pulling speed and relatively larger section.
The covering slag is an important auxiliary material in continuous casting production, and can ensure the smooth running of the continuous casting process and the production of a defect-free casting blank. The covering slag ensures proper heat transfer and consumption, and has lower melting point and viscosity; when the radian of the viscosity turning curve is larger, the process adaptability is better. Due to Al 2 O 3 The increase in the content causes an increase in melting point and viscosity, so that the general mold flux does not additionally increase Al 2 O 3 . However, since the casting powder contains low aluminum or no aluminum, aluminum in the aluminum-containing coiled plate steel is more easily absorbed by the casting powder due to the element balance effect, so that the casting powder is denatured, and a high-melting-point and high-viscosity substance is formed, thereby affecting continuous casting and the performance of a casting blank. Although the following are providedHowever, it has also been studied to add Al to the mold flux 2 O 3 To reduce Al in molten steel 2 O 3 The effect on the mold flux, but this also causes an increase in the melting point viscosity of the mold flux, affecting the usability of the mold flux.
Disclosure of Invention
Aiming at the problems, the invention provides the aluminum-containing middle rolled plate casting powder which has lower melting point viscosity, larger radian of a viscosity turning curve and good process adaptability.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the aluminum-containing middle-rolled plate covering slag comprises the following components in percentage by mass: siO (SiO) 2 ：24.0％～30.0％，CaO：33.0％～38.0％，MgO：1.0％～4.0％，Al 2 O 3 ：4.0％～8.0％，C：4.0％～6.0％，Na 2 O：6.0％～11.0％，F - ：6.0％～9.0％，Li 2 O：0.8％～2.2％，Fe 2 O 3 Less than or equal to 1.0 percent, and the balance being unavoidable impurities;
the viscosity of the aluminum-containing middle rolling plate covering slag is 0.07 Pa.S-0.09 Pa.S at 1300 ℃.
Compared with the prior art, the aluminum-containing middle rolled plate casting powder provided by the application comprises SiO 2 、CaO、MgO、Al 2 O 3 、C、Na 2 O、F - 、Li 2 O and Fe 2 O 3 Equal components of CaO and SiO 2 And Al 2 O 3 Based on Al 2 O 3 The stability of the casting powder in the long casting time use process of the aluminum-containing steel is improved; by CaO and SiO 2 Regulating the alkalinity of the protecting slag; c is taken as a carbonaceous material and is taken as a framework support, and the thickness and the melting speed of the sintered layer are adjusted; by Li 2 O, mgO and Na 2 O is flux, and the melting point of the protective slag is adjusted; through F - The viscosity of the mold flux was further adjusted. The aluminum-containing middle rolled plate covering slag provided by the invention contains 4.0% -8.0% of Al 2 O 3 Then the viscosity of the protecting slag at 1300 ℃ is realized through reasonable compounding and synergistic effect among a plurality of componentsThe viscosity turning curve radian is larger and the adaptability of the covering slag is improved only between 0.07 Pa.S and 0.09 Pa.S.
Preferably, the alkalinity of the aluminum-containing middle rolled plate casting powder is 1.31-1.35. By limiting the alkalinity of the coiled plate covering slag in aluminum-containing, the capability of absorbing substances included in molten steel by the covering slag is ensured, and the crystallization temperature, viscosity and crack control capability of the covering slag are also ensured.
Preferably, said F - The raw materials of (a) are sodium fluoride, cryolite and fluorite. By using sodium fluoride and cryolite to replace part of fluorite and industrial sodium carbonate, not only is the formation of high-melting-point substances such as nepheline, gun crystal stone and the like avoided, but also the melting-point viscosity of the protective slag is ensured not to be too high, and meanwhile, the stability of the protective slag is improved.
Preferably, the melting point of the aluminum-containing middle rolled plate casting powder is 1084-1100 ℃.
Preferably, the turning temperature of the covering slag of the aluminum-containing middle rolled plate is 1160-1190 ℃.
Preferably, the aluminum-containing middle rolled plate covering slag is hollow granular pellets with the diameter of 0.1 mm-1.4 mm.
Preferably, the aluminum-containing middle rolled plate protection slag comprises the following raw materials in percentage by mass: carbon black: 1% -3% of medium carbon graphite: 0.5 to 2.5 percent of graphite: 1% -3%, binder: 0.5 to 2.5 percent of sodium carbonate: 2% -13% of wollastonite: 20% -40%, blast furnace slag: 2% -6%, premelt material: 15% -50% of bauxite: 0.5 to 3.0 percent of lithium carbonate: 2% -6% of sodium fluoride: 1% -6% of fluorite: 1% -11% of cryolite: 2% -6% of limestone: 0.5 to 5.0 percent of magnesite: 0.5 to 1.5 percent.
Compared with the prior art, the bauxite is added, and from the viewpoint of element balance, the problem that the covering slag is denatured due to the fact that aluminum in the steel grade of the aluminum-containing coiled plate is absorbed by the covering slag can be solved. However, the addition of aluminum can raise the melting point and viscosity of the mold flux, and only the common industrial soda and fluorite are used as the flux, which can cause excessive proportion, and the inventor finds that when the amount of the industrial soda is more than 15% and the amount of the fluorite is more than 20%, the effect is limited, and even the addition of the excessive industrial soda and fluorite can generate high-melting-point substances such as nepheline, kyanite and the like, which can affect the use effect of the mold flux; and after the sodium carbonate and fluorite are reduced, the melting point viscosity of the mold flux is increased, so that other fluxes are required to be introduced for balancing. According to the invention, sodium fluoride and cryolite are introduced, so that the use amount of industrial sodium carbonate and fluorite is reduced, the stability of the protective slag is improved, the prepared aluminum-containing medium-rolled plate protective slag has a larger radian of a viscosity turning curve, and the adaptability of the protective slag is improved.
Preferably, the blast furnace slag comprises the following components in percentage by mass: siO (SiO) 2 ：35％～40％，CaO：37％～45％，MgO：3％～8％，Al 2 O 3 ：10％～15％，Fe 2 O 3 ：0.1％～1.0％。
Preferably, the premelt comprises the following components in percentage by mass: siO (SiO) 2 ：25％～30％，CaO：40％～50％，MgO：5％～10％，Al 2 O 3 ：5％～10％，Na 2 O：0.5％～2.0％，F - ：2.0％～8.0％，Fe 2 O 3 ：0.1％～2.0％。
Preferably, the binder is at least one of dextrin, pregelatinized starch or sodium carboxymethyl cellulose.
Preferably, the granularity of the raw material of the aluminum-containing middle rolled plate casting powder is not lower than 300 meshes.
Preferably, the aluminum-containing middle rolled plate covering slag is prepared from the raw materials through proportioning, pulping, spray granulation, screening and detection.
Preferably, the spray granulation is carried out in a high-temperature spray tower, the inlet tower temperature is 800-820 ℃, the tower temperature is 820-880 ℃, and the exhaust temperature is 140-150 ℃.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph showing the viscosity transition of the aluminum-containing rolled sheet mold flux prepared in example 1 of the present invention;
FIG. 2 is a graph showing the viscosity transition of the aluminum-containing rolled sheet mold flux prepared in comparative example 1 according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order to better illustrate the present invention, the following examples are provided for further illustration.
Example 1
The embodiment provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil-like graphite, 45kg of binder, 270kg of industrial soda ash, 1050kg of wollastonite, 150kg of blast furnace slag, 510kg of premelt, 60kg of bauxite, 150kg of lithium carbonate, 60kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 120kg of limestone and 30kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the blast furnace slag comprises the following components in percentage by mass: siO (SiO) 2 ：38.28％，CaO：41.24％，MgO：5.13％，Al 2 O 3 ：12.2％，Fe 2 O 3 :0.48% and the balance of impurities. The premelt material comprises the following components in percentage by mass: siO (SiO) 2 ：27.24％，CaO：46.29％，MgO：7.17％，Al 2 O 3 ：7.02％，Na 2 O：1.1％，F - ：5.32％，Fe 2 O 3 :0.73%, the balance being impurities.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
Through detection, the aluminum-containing middle rolled plate protection slag prepared by the implementation comprises the following components in percentage by mass: siO (SiO) 2 ：25.72％，CaO：34.21％，MgO：2.80％，Al 2 O 3 ：4.64％，C：4.96％，Na 2 O：7.19％，F - ：7.48％，Li 2 O：2.01％，Fe 2 O 3 :0.36% and the balance of 10.63% of unavoidable impurities.
The viscosity at 1300 ℃ is 0.08 Pa.S, the alkalinity is 1.33, the melting point is 1092 ℃, and the turning temperature is 1175 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
The viscosity turning curve of the aluminum-containing middle rolled plate casting powder prepared by the implementation is shown in figure 1.
Example 2
The embodiment provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil graphite, 45kg of binder, 240kg of industrial soda ash, 1050kg of wollastonite, 120kg of blast furnace slag, 510kg of premelt, 60kg of bauxite, 150kg of lithium carbonate, 120kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 120kg of limestone and 30kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 800 ℃, the temperature in the tower is 820 ℃, and the exhaust temperature is 140 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：25.43％，CaO：34.25％，MgO：2.75％，Al 2 O 3 ：4.51％，C：4.96％，Na 2 O：7.73％，F - ：8.37％，Li 2 O：2.01％，Fe 2 O 3 :0.36%, the balance being 9.63% of unavoidable impurities.
The viscosity at 1300 ℃ is 0.07 Pa.S, the alkalinity is 1.35, the melting point is 1098 ℃, and the turning temperature is 1187 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
Example 3
The embodiment provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil graphite, 45kg of binder, 330kg of industrial soda ash, 1050kg of wollastonite, 120kg of blast furnace slag, 510kg of premelt, 60kg of bauxite, 150kg of lithium carbonate, 30kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 120kg of limestone and 30kg of magnesia are added, the slurry concentration is 59.5% -60.5%, a vertical mill cycle is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 820 ℃, the temperature in the tower is 880 ℃, and the exhaust temperature is 150 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：25.34％，CaO：33.31％，MgO：2.75％，Al 2 O 3 ：4.51％，C：4.96％，Na 2 O：7.79％，F - ：7.04％，Li 2 O：2.01％，Fe 2 O 3 :0.36%, the balance 11.93% of unavoidable impurities.
The viscosity at 1300 ℃ is 0.09 Pa.S, the alkalinity is 1.31, the melting point is 1086 ℃, and the turning temperature is 1164 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
Example 4
The embodiment provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 30kg of soil-like graphite, 45kg of binder, 60kg of industrial soda ash, 600kg of wollastonite, 75kg of blast furnace slag, 1500kg of premelt, 15kg of bauxite, 150kg of lithium carbonate, 180kg of sodium fluoride, 30kg of fluorite, 180kg of cryolite, 15kg of limestone and 15kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：25.31％，CaO：33.96％，MgO：3.98％，Al 2 O 3 ：6.42％，C：4.14％，Na 2 O：6.50％，F - ：8.23％，Li 2 O：2.03％，Fe 2 O 3 :0.45%, the balance 8.98% of unavoidable impurities or burn-out.
The viscosity at 1300 ℃ is 0.09 Pa.S, the alkalinity is 1.34, the melting point is 1099 ℃, and the turning temperature is 1189 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
Example 5
The embodiment provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil graphite, 45kg of binder, 390kg of industrial soda ash, 990kg of wollastonite, 60kg of blast furnace slag, 690kg of premelt, 60kg of bauxite, 60kg of lithium carbonate, 120kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 15kg of limestone and 15kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：25.01％，CaO：33.02％，MgO：2.54％，Al 2 O 3 ：4.68％，C：4.96％，Na 2 O：10.66％，F - ：8.69％，Li 2 O：0.81％，Fe 2 O 3 :0.89%, the balance 8.74% of unavoidable impurities or burn-out.
The viscosity at 1300 ℃ is 0.07 Pa.S, the alkalinity is 1.31, the melting point is 1085 ℃, and the turning temperature is 1161 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
Comparative example 1
The comparative example provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil-like graphite, 45kg of binder, 270kg of industrial soda ash, 1050kg of wollastonite, 150kg of blast furnace slag, 465kg of premelt, 105kg of bauxite, 150kg of lithium carbonate, 60kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 120kg of limestone and 30kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：25.67％，CaO：33.51％，MgO：2.69％，Al 2 O 3 ：5.59％，C：4.96％，Na 2 O：7.18％，F - ：7.40％，Li 2 O：2.01％，Fe 2 O 3 :0.42% and the balance of 10.57% of unavoidable impurities.
The viscosity at 1300 ℃ is 0.10 Pa.S, the alkalinity is 1.34, the melting point is 1089 ℃, and the turning temperature is 1175 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
The viscosity turning curve of the aluminum-containing middle rolled plate casting powder prepared in the comparative example is shown in fig. 2.
Comparative example 2
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil-like graphite, 45kg of binder, 270kg of industrial soda ash, 1050kg of wollastonite, 150kg of blast furnace slag, 540kg of premelt, 30kg of bauxite, 150kg of lithium carbonate, 60kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 120kg of limestone and 30kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：25.76％，CaO：34.68％，MgO：2.88％，Al 2 O 3 ：3.91％，C：4.96％，Na 2 O：7.23％，F - ：7.55％，Li 2 O：2.01％，Fe 2 O 3 :0.29%, the balance being 10.73% of unavoidable impurities or burn-outs.
The viscosity at 1300 ℃ is 0.08 Pa.S, the alkalinity is 1.33, the melting point is 1099 ℃, and the turning temperature is 1181 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
Comparative example 3
The comparative example provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(1) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil graphite, 45kg of binder, 420kg of industrial soda ash, 990kg of wollastonite, 75kg of blast furnace slag, 300kg of premelt, 300kg of bauxite, 150kg of lithium carbonate, 510kg of fluorite, 15kg of limestone and 30kg of magnesia are added, slurry concentration is 59.5-60.5%, vertical mill circulation is started, the rotating speed is 124r/min, and static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：23.62％，CaO：31.9％，MgO：2.15％，Al 2 O 3 ：8.46％，C：4.96％，Na 2 O：8.13％，F - ：8.11％，Li 2 O：2.01％，Fe 2 O 3 :0.66% and the balance of 10.00% of unavoidable impurities or burn-outs.
The viscosity at 1300 ℃ is 0.10 Pa.S, the alkalinity is 1.33, the melting point is 1117 ℃, and the turning temperature is 1205 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
Comparative example 4
The comparative example provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(2) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil-like graphite, 45kg of binder, 270kg of industrial soda ash, 1050kg of wollastonite, 150kg of blast furnace slag, 540kg of premelt, 60kg of bauxite, 120kg of lithium carbonate, 60kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 120kg of limestone and 30kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：26.82％，CaO：35.56％，MgO：2.98％，Al 2 O 3 ：4.97％，C：4.96％，Na 2 O：7.20％，F - ：7.54％，Li 2 O：0.75％，Fe 2 O 3 :0.38%, the balance 8.84% of unavoidable impurities.
The viscosity at 1300 ℃ is 0.09 Pa.S, the alkalinity is 1.33, the melting point is 1099 ℃, and the turning temperature is 1191 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
Comparative example 5
The comparative example provides a preparation method of aluminum-containing middle rolled plate covering slag, which comprises the following steps:
(3) 2025L of water is added into a stirring tank of a stirrer, 330kg of carbon black with the fineness of more than 300 meshes, 45kg of medium carbon graphite, 60kg of soil-like graphite, 45kg of binder, 270kg of industrial soda ash, 990kg of wollastonite, 150kg of blast furnace slag, 510kg of premelt, 75kg of bauxite, 150kg of lithium carbonate, 60kg of sodium fluoride, 300kg of fluorite, 90kg of cryolite, 120kg of limestone and 75kg of magnesia are added, the slurry concentration is 59.5% -60.5%, the vertical mill circulation is started, the rotating speed is 124r/min, and the static stirring time is 60 minutes, so that mixed slurry is obtained. Wherein the premelt and the blast furnace slag are the same as in example 1.
(2) The mixed slurry is pumped into a high-temperature spray tower through a spray gun by a plunger pump for spray granulation, the temperature of the inlet tower is 810 ℃, the temperature in the tower is 850 ℃, and the exhaust temperature is 145 ℃. And screening by a 14-mesh and 140-mesh double-layer screen below the tower, and detecting to obtain the aluminum-containing middle coil plate covering slag.
Adopts RTW-10 type melt physical property comprehensive measuring instrument, vertical carbon tube heating furnace, melting point measuring instrument, F5 fluorine measuring instrument and titration to determine chemical and physical analysis of the protecting slag.
The detection shows that the prepared aluminum-containing medium rolled plate protection slag comprises the following components in percentage by mass: siO (SiO) 2 ：24.83％，CaO：33.35％，MgO：4.19％，Al 2 O 3 ：4.99％，C：4.96％，Na 2 O：7.19％，F - ：7.48％，Li 2 O：2.01％，Fe 2 O 3 :0.38%, the balance being 10.62% of unavoidable impurities.
The viscosity at 1300 ℃ is 0.07 Pa.S, the alkalinity is 1.34, the melting point is 1110 ℃, and the turning temperature is 1147 ℃; the appearance of the material is hollow granular pellets, and the diameter of the material is 0.1 mm-1.4 mm.
The aluminum-containing intermediate coil mold flux prepared in examples 1 to 5 and comparative examples 1 to 5 was respectively added into an intermediate coil billet continuous casting crystallizer with a section of 1600 x 220 and a pulling rate of 0.6 to 1.5m/min for test, and the test results are shown in Table 1 in detail. As can be seen from the analysis in Table 1, after the aluminum-containing intermediate rolled plate casting powder prepared in examples 1 to 5 is added, the casting blank has good quality, no crack is generated, and the test is qualified. The aluminum-containing middle rolled plate casting powder prepared in examples 1 to 5 is subjected to an expansion test, the whole test is carried out for 1 casting time, the bonding phenomenon is avoided during the use period, the casting blank quality is good, and the test is qualified.
TABLE 1
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The aluminum-containing middle rolling plate covering slag is characterized by comprising the following components in percentage by mass: siO (SiO) 2 ：24.0％～30.0％，CaO：33.0％～38.0％，MgO：1.0％～4.0％，Al 2 O 3 ：4.0％～8.0％，C：4.0％～6.0％，Na 2 O：6.0％～11.0％，F - ：6.0％～9.0％，Li 2 O：0.8％～2.2％，Fe 2 O 3 Less than or equal to 1.0 percent, and the balance being unavoidable impurities;
the viscosity of the aluminum-containing middle rolling plate covering slag is 0.07 Pa.S-0.09 Pa.S at 1300 ℃;
the turning temperature of the covering slag of the aluminum-containing middle rolled plate is 1160-1190 ℃;
the aluminum-containing middle rolling plate protection slag comprises the following raw materials in percentage by mass: carbon black: 1% -3% of medium carbon graphite: 0.5 to 2.5 percent of graphite: 1% -3%, binder: 0.5 to 2.5 percent of sodium carbonate: 2% -13% of wollastonite: 20% -40%, blast furnace slag: 2% -6%, premelt material: 15% -50% of bauxite: 0.5 to 3.0 percent of lithium carbonate: 2% -6% of sodium fluoride: 1% -6% of fluorite: 1% -11% of cryolite: 2% -6% of limestone: 0.5 to 5.0 percent of magnesite: 0.5 to 1.5 percent;
the blast furnace slag comprises the following components in percentage by mass: siO (SiO) 2 ：35％～40％，CaO：37％～45％，MgO：3％～8％，Al 2 O 3 ：10％～15％，Fe 2 O 3 ：0.1％～1.0％；
The premelt material comprises the following components in percentage by mass: siO (SiO) 2 ：25％～30％，CaO：40％～50％，MgO：5％～10％，Al 2 O 3 ：5％～10％，Na 2 O：0.5％～2.0％，F - ：2.0％～8.0％，Fe 2 O 3 ：0.1％～2.0％。
2. The aluminum-containing intermediate coil mold flux of claim 1, wherein the basicity of the aluminum-containing intermediate coil mold flux is between 1.31 and 1.35.
3. The aluminum-containing intermediate rolled sheet mold flux according to claim 1, wherein F - The raw materials of (a) are sodium fluoride, cryolite and fluorite.
4. The aluminum-containing intermediate coil covering slag according to claim 1, wherein the melting point of the aluminum-containing intermediate coil covering slag is 1084 ℃ to 1100 ℃.
5. The aluminum-containing middle rolled plate covering slag according to claim 1, wherein the aluminum-containing middle rolled plate covering slag is hollow granular pellets with a diameter of 0.1 mm-1.4 mm.
6. The aluminum-containing intermediate rolled sheet covering slag according to claim 1, wherein the binder is at least one of dextrin, pregelatinized starch or sodium carboxymethyl cellulose.
7. The aluminum-containing intermediate coil mold flux of claim 1, wherein the aluminum-containing intermediate coil mold flux has a raw material particle size of not less than 300 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310861742.2A CN116871472B (en) | 2023-07-13 | 2023-07-13 | Aluminum-containing middle rolling plate covering slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310861742.2A CN116871472B (en) | 2023-07-13 | 2023-07-13 | Aluminum-containing middle rolling plate covering slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116871472A CN116871472A (en) | 2023-10-13 |
| CN116871472B true CN116871472B (en) | 2024-03-08 |
Family
ID=88265749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310861742.2A Active CN116871472B (en) | 2023-07-13 | 2023-07-13 | Aluminum-containing middle rolling plate covering slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116871472B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101406939A (en) * | 2008-11-18 | 2009-04-15 | 重庆大学 | High-sodium low-fluorine continuous casting mould fluxes and preparation method thereof |
| CN105414505A (en) * | 2015-12-18 | 2016-03-23 | 河南省西保冶材集团有限公司 | Special covering slag for auto sheet CSP sheet billet |
| CN106583673A (en) * | 2016-12-16 | 2017-04-26 | 河南通宇冶材集团有限公司 | Continuous-casting mold flux for decreasing sticking steel breakouts and preparation method thereof |
| CN108838355A (en) * | 2018-07-09 | 2018-11-20 | 西峡龙成冶金材料有限公司 | A kind of continuous-casting crystallizer especially used covering slag of ESP low-carbon |
| CN109604548A (en) * | 2019-01-24 | 2019-04-12 | 西峡龙成冶金材料有限公司 | A kind of high pulling rate special-purpose multifunctional crystallizer protecting residue of sheet billet and preparation method thereof |
| CN110976797A (en) * | 2019-12-25 | 2020-04-10 | 河南通宇冶材集团有限公司 | Micro-carbon covering slag for medium-high carbon steel of square and rectangular billets and preparation method thereof |
| CN113714477A (en) * | 2021-09-09 | 2021-11-30 | 张家口汇德冶金材料有限公司 | Formula and production process of low-carbon covering slag containing titanium stainless steel |
-
2023
- 2023-07-13 CN CN202310861742.2A patent/CN116871472B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101406939A (en) * | 2008-11-18 | 2009-04-15 | 重庆大学 | High-sodium low-fluorine continuous casting mould fluxes and preparation method thereof |
| CN105414505A (en) * | 2015-12-18 | 2016-03-23 | 河南省西保冶材集团有限公司 | Special covering slag for auto sheet CSP sheet billet |
| CN106583673A (en) * | 2016-12-16 | 2017-04-26 | 河南通宇冶材集团有限公司 | Continuous-casting mold flux for decreasing sticking steel breakouts and preparation method thereof |
| CN108838355A (en) * | 2018-07-09 | 2018-11-20 | 西峡龙成冶金材料有限公司 | A kind of continuous-casting crystallizer especially used covering slag of ESP low-carbon |
| CN109604548A (en) * | 2019-01-24 | 2019-04-12 | 西峡龙成冶金材料有限公司 | A kind of high pulling rate special-purpose multifunctional crystallizer protecting residue of sheet billet and preparation method thereof |
| CN110976797A (en) * | 2019-12-25 | 2020-04-10 | 河南通宇冶材集团有限公司 | Micro-carbon covering slag for medium-high carbon steel of square and rectangular billets and preparation method thereof |
| CN113714477A (en) * | 2021-09-09 | 2021-11-30 | 张家口汇德冶金材料有限公司 | Formula and production process of low-carbon covering slag containing titanium stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116871472A (en) | 2023-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110976797B (en) | Micro-carbon covering slag for medium-high carbon steel of square and rectangular billets and preparation method thereof | |
| CN104788112B (en) | A kind of electro-corundum material and production method thereof | |
| CN101658907B (en) | Protective slag of large-profile round billet continuous-casting crystallizer and method for preparing same | |
| CN102019384B (en) | High-viscosity continuous casting protective slag for solving slag inclusion on surface of low-carbon steel | |
| CN102586543B (en) | Steel ladle slag reducing agent with high calcium oxide content, and preparation method thereof | |
| CN108856666B (en) | Continuous casting covering slag for stainless steel and preparation method thereof | |
| CN109202055B (en) | High-quality special steel drainage agent and preparation method thereof | |
| CN109579525A (en) | The system for preparing high-purity potassium steel | |
| CN110605364B (en) | Environment-friendly tundish covering agent and preparation method thereof | |
| CN110614351B (en) | Continuous casting covering slag for stainless steel and preparation method thereof | |
| CN116871472B (en) | Aluminum-containing middle rolling plate covering slag | |
| CN115159961A (en) | Method for recycling waste magnesium dry material for continuous casting tundish | |
| CN110315040A (en) | A kind of high titanium abrasion-resistant stee continuous crystallizer protecting slag of high-carbon | |
| CN109487036A (en) | 18 potassium steel of high-purity manganese and preparation method thereof | |
| CN1936029A (en) | Method for utilizing waste steel ladle pouring material as converter slag-making fluxing agent | |
| CN100432241C (en) | Assistant deoxidizer in use for smelting cold rolled and hot rolled low carbon aluminium-killed steel | |
| CN116586576B (en) | Continuous casting large round billet low-carbon steel covering slag and preparation method thereof | |
| CN109550913A (en) | A kind of hypoergia covering slag used for ultra-low-carbon steel containing aluminium | |
| CN112552059A (en) | Steel ladle slag line repairing material | |
| CN114309508B (en) | CaO-BaO-MgO-Al 2 O 3 Quaternary slag system tundish covering agent and its preparation method | |
| CN114713782B (en) | Premelting crystallizer covering slag for rare earth stainless steel and preparation method | |
| CN113798458B (en) | Continuous casting crystallizer casting powder and preparation method and application thereof | |
| KR100328072B1 (en) | Fabrication method of synthesized slag | |
| CN115178717B (en) | Small plate blank high-pulling-speed peritectic steel covering slag and application thereof | |
| JPH04138858A (en) | Flux for continuous casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |