CN113714477A - Formula and production process of low-carbon covering slag containing titanium stainless steel - Google Patents
Formula and production process of low-carbon covering slag containing titanium stainless steel Download PDFInfo
- Publication number
- CN113714477A CN113714477A CN202111053684.8A CN202111053684A CN113714477A CN 113714477 A CN113714477 A CN 113714477A CN 202111053684 A CN202111053684 A CN 202111053684A CN 113714477 A CN113714477 A CN 113714477A
- Authority
- CN
- China
- Prior art keywords
- parts
- powder
- graphite
- carbon
- perovskite
- 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.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims abstract description 101
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 92
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 31
- 239000010936 titanium Substances 0.000 title claims abstract description 31
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 30
- 239000010935 stainless steel Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000009472 formulation Methods 0.000 title description 2
- 239000000843 powder Substances 0.000 claims abstract description 191
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 155
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims abstract description 112
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 88
- 239000010439 graphite Substances 0.000 claims abstract description 70
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 70
- 239000011230 binding agent Substances 0.000 claims abstract description 56
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 56
- 239000006229 carbon black Substances 0.000 claims abstract description 56
- 229910001610 cryolite Inorganic materials 0.000 claims abstract description 56
- 239000010436 fluorite Substances 0.000 claims abstract description 56
- 235000013024 sodium fluoride Nutrition 0.000 claims abstract description 56
- 239000011775 sodium fluoride Substances 0.000 claims abstract description 56
- 239000010456 wollastonite Substances 0.000 claims abstract description 56
- 229910052882 wollastonite Inorganic materials 0.000 claims abstract description 56
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 32
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002689 soil Substances 0.000 claims abstract description 25
- 238000000227 grinding Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000005303 weighing Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 36
- 230000004907 flux Effects 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 23
- 238000007873 sieving Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 9
- 239000008188 pellet Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 abstract description 3
- 238000009749 continuous casting Methods 0.000 description 13
- 238000002425 crystallisation Methods 0.000 description 12
- 230000008025 crystallization Effects 0.000 description 12
- 239000010959 steel Substances 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
Abstract
The invention belongs to the technical field of metallurgical auxiliary materials, and particularly relates to a formula and a production process of low-carbon covering slag containing titanium stainless steel, wherein the production process comprises the following steps: s1: preparing raw materials: weighing the following raw materials in parts by weight: 15-19 parts of 330 carbon black, 8-12 parts of medium carbon graphite, 9-13 parts of earthy graphite, 5-9 parts of a binder, 11-15 parts of industrial soda ash, 7-11 parts of wollastonite, 15-19 parts of perovskite, 3-7 parts of blast furnace slag, 2-6 parts of fluorite, 12-16 parts of cryolite, 24-28 parts of sodium fluoride and 12-16 parts of organic water for later use; s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride which are described in S1. The surface of the casting powder prepared by the invention is rougher, and the longitudinal cracks on the surface of the plate blank can be effectively prevented.
Description
Technical Field
The invention relates to the technical field of metallurgical auxiliary materials, in particular to a formula and a production process of low-carbon covering slag containing titanium stainless steel.
Background
A serious problem in the continuous casting of crack sensitive steel grades is the occurrence of longitudinal cracks in the slab surface. The continuous casting billet is slowly cooled to avoid the occurrence of surface cracks of the continuous casting billet, heat emitted in the solidification process of liquid steel in the continuous casting production process is transferred to the outside through a slag film, and the occurrence probability of longitudinal cracks on the continuous casting surface can be reduced by reducing the transmission of the heat. Researchers study the influence of physicochemical properties such as crystallization temperature, viscosity and the like of the covering slag on the reduction of the cooling rate of the plate blank through heat transfer theoretical calculation and laboratory simulation, and consider that the crystallization behavior of the covering slag is an important factor influencing heat transfer. Until now, there have been several proposals regarding the principle of heat transfer between the shell of the continuous cast billet and the mould:
1) the mold flux with higher crystallization temperature can form a thick crystallization layer between the casting blank and the crystallizer, thereby increasing the thermal resistance between interfaces;
2) the air hole gap between the covering slag film and the continuous casting crystallizer can reduce the heat conduction between the crystallizer and the continuous casting blank shell;
3) when the peritectic ore grows between the crystallizer and the blank shell, air gap holes are generated on a slag film, and the air gap holes can reduce the heat flow on the surface and the heat gradient of outward heat conduction, so that the interface thermal resistance is increased;
4) the crystallized phases reduce the radiative heat transfer by absorption and extinction coefficients, which Yamauchi considers to be 20% of the total heat transfer. Researchers have also concluded that the slag film in the glassy phase has lower conductive and radiative heat transfer than the crystalline slag film, indicating that "holes" created by the crystalline slag film and the extinction of the crystalline slag film can increase heat transfer. From the practical situation, the increase of the crystallization property of the covering slag can indeed play a role in reducing the heat flow, so that the main factor influencing the continuous casting solidification heat transfer is the interface heat transfer resistance between the crystallizer and the covering slag film, namely the thermal resistance related to the surface roughness of the covering slag film. The rougher the surface of the mold flux, the larger the air gap, and the more remarkable the effect of reducing the heat flux. The surface roughness of the mold flux is an important factor affecting the lubrication and heat transfer of the continuous casting mold.
In the continuous casting production process of the titanium-containing stainless steel, the covering slag inevitably absorbs the TiO floated up from the molten steel2Inclusions, or SiO in titanium-containing mold flux present in molten steel2After oxidation, the mixture enters into the casting powder and added TiO2Influences on the viscosity, crystallization behavior, etc. of the mold flux. The mold flux used in production has different properties from the original mold flux. The most important 2 metallurgical functions of the covering slag are lubricating continuous casting billets and controlling heat transfer of a crystallizer, and continuous casting is carried out if the lubricating and heat transfer controlling functions cannot be normally exertedThe blank is easy to form defects such as pits, cracks and the like, and the occurrence probability of steel leakage accidents is increased when the defects are serious. The lubricating effect is related to the viscosity of the mold flux, the solidification temperature, and the thickness of the liquid slag layer determined by the factors such as the melting temperature and the amount of carbon added, the heat transfer control effect depends on the crystallization ability of the mold flux, and the crystallization ability of the mold flux is proportional to the crystallization temperature. The influence of titanium oxide on the melting temperature, the crystallization temperature, the viscosity and the solidification temperature of the covering slag with different alkalinity is different.
Disclosure of Invention
The invention aims to solve the defect that longitudinal cracks appear on the surface of a plate blank when crack sensitive steel is produced by continuous casting in the prior art, and provides a formula and a production process of low-carbon covering slag containing titanium stainless steel.
In order to achieve the purpose, the invention adopts the following technical scheme:
the formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 15-19 parts of 330 carbon black, 8-12 parts of medium carbon graphite, 9-13 parts of earthy graphite, 5-9 parts of a binder, 11-15 parts of industrial soda ash, 7-11 parts of wollastonite, 15-19 parts of perovskite, 3-7 parts of blast furnace slag, 2-6 parts of fluorite, 12-16 parts of cryolite, 24-28 parts of sodium fluoride and 12-16 parts of organic water.
Preferably, the formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 330 parts of carbon black 15, 8 parts of medium carbon graphite, 9 parts of earthy graphite, 5 parts of a binder, 11 parts of industrial soda ash, 7 parts of wollastonite, 15 parts of perovskite, 3 parts of blast furnace slag, 2 parts of fluorite, 12 parts of cryolite, 24 parts of sodium fluoride and 12 parts of organic water.
Preferably, the formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 330 carbon black 19 parts, medium carbon graphite 12 parts, soil graphite 13 parts, binder 9 parts, industrial soda 15 parts, wollastonite 11 parts, perovskite 19 parts, blast furnace slag 7 parts, fluorite 6 parts, cryolite 16 parts, sodium fluoride 28 parts and organic water 16 parts.
The invention also provides a production process of the low-carbon covering slag containing titanium stainless steel, which comprises the following steps:
s1: preparing raw materials: weighing the following raw materials in parts by weight: 15-19 parts of 330 carbon black, 8-12 parts of medium carbon graphite, 9-13 parts of earthy graphite, 5-9 parts of a binder, 11-15 parts of industrial soda ash, 7-11 parts of wollastonite, 15-19 parts of perovskite, 3-7 parts of blast furnace slag, 2-6 parts of fluorite, 12-16 parts of cryolite, 24-28 parts of sodium fluoride and 12-16 parts of organic water for later use;
s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride which are described in S1 to obtain 330 carbon black powder, medium carbon graphite powder, soil graphite powder, binder powder, industrial soda ash powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder;
s3: and (3) sieving treatment: sieving 330 carbon black powder, medium-carbon graphite powder, earthy graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are all described in S2;
s4: stirring treatment: sequentially adding 330 carbon black powder, medium-carbon graphite powder, soil-like graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are sieved in S3 into a stirrer for stirring treatment to obtain a mixture;
s5: circulating stirring: adding organic water into the mixture obtained in the step S4, and performing circulating stirring treatment to obtain a uniform mixture;
s6: high-temperature treatment: pumping the mixed material obtained in the step S5 into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the diameter of 0.1-1.5mm being more than or equal to 95%.
Preferably, in S2, the carbon black, the medium carbon graphite, the soil graphite, the binder, the industrial soda, the wollastonite, the perovskite, the blast furnace slag, the fluorite, the cryolite and the sodium fluoride are ground by a grinder 330, and the grinding time is set to 15-30 min.
Preferably, in the S3, the fineness of the raw material must reach 300 meshes and the passing rate reaches 96%.
Preferably, in the S4, the rotation speed of the stirrer is set to 400-.
Preferably, in the step S5, the stirring time is set to 60-80 min.
The invention relates to a formula and a production process of low-carbon covering slag containing titanium stainless steel,
grinding 330 carbon black, medium carbon graphite, earthy graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride, wherein the fineness of all raw materials is required to reach more than 96 percent of the pass rate of 300 meshes, putting the raw materials into a stirrer in a certain sequence, adding organic water into the stirrer for circular stirring, pumping the mixture into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the particle size of 0.1-1.5mm being more than or equal to 95 percent, and measuring TiO in the low-carbon protective slag2The content of the protective slag is 2-10%, which is beneficial to nucleation and development of crystals, improves the crystallization rate of perovskite, makes the surface of the protective slag rougher, and further can effectively prevent longitudinal cracks from appearing on the surface of the slab.
According to the formula and the production process of the low-carbon covering slag containing titanium stainless steel, the surface of the covering slag becomes rougher, and further the longitudinal cracks on the surface of a plate blank can be effectively prevented.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
The formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 330 parts of carbon black 15, 8 parts of medium carbon graphite, 9 parts of earthy graphite, 5 parts of a binder, 11 parts of industrial soda ash, 7 parts of wollastonite, 15 parts of perovskite, 3 parts of blast furnace slag, 2 parts of fluorite, 12 parts of cryolite, 24 parts of sodium fluoride and 12 parts of organic water.
The embodiment also provides a production process of the low-carbon covering slag containing titanium stainless steel, which comprises the following steps:
s1: preparing raw materials: weighing the following raw materials in parts by weight: 330 parts of carbon black, 8 parts of medium carbon graphite, 9 parts of earthy graphite, 5 parts of a binder, 11 parts of industrial soda ash, 7 parts of wollastonite, 15 parts of perovskite, 3 parts of blast furnace slag, 2 parts of fluorite, 12 parts of cryolite, 24 parts of sodium fluoride and 12 parts of organic water for later use;
s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride in S1 to obtain 330 carbon black powder, medium carbon graphite powder, soil graphite powder, binder powder, industrial soda ash powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder;
s3: and (3) sieving treatment: sieving 330 carbon black powder, medium-carbon graphite powder, earthy graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder in S2;
s4: stirring treatment: sequentially adding 330 carbon black powder, medium-carbon graphite powder, soil-like graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are sieved in S3 into a stirrer for stirring treatment to obtain a mixture;
s5: circulating stirring: adding organic water into the mixture obtained in the step S4, and performing circulating stirring treatment to obtain a uniform mixture;
s6: high-temperature treatment: pumping the mixed material obtained in the step S5 into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the diameter of 0.1-1.5mm being more than or equal to 95%.
In this embodiment, in S2, a grinder is used to grind 330 carbon black, medium carbon graphite, soil graphite, binder, industrial soda, wollastonite, perovskite, blast furnace slag, fluorite, cryolite, and sodium fluoride, and the grinding time is set to 15min, in S3, the fineness of the raw material must reach 300 mesh and the pass rate reaches 96%, in S4, the rotation speed of the stirrer is set to 400r/min, and in S5, the stirring time is set to 60 min.
Example two
The formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 330 parts of carbon black 16, 9 parts of medium carbon graphite, 10 parts of earthy graphite, 6 parts of binder, 12 parts of industrial soda ash, 8 parts of wollastonite, 16 parts of perovskite, 4 parts of blast furnace slag, 3 parts of fluorite, 13 parts of cryolite, 25 parts of sodium fluoride and 13 parts of organic water.
The embodiment also provides a production process of the low-carbon covering slag containing titanium stainless steel, which comprises the following steps:
s1: preparing raw materials: weighing the following raw materials in parts by weight: 330 parts of carbon black, 9 parts of medium carbon graphite, 10 parts of earthy graphite, 6 parts of a binder, 12 parts of industrial soda ash, 8 parts of wollastonite, 16 parts of perovskite, 4 parts of blast furnace slag, 3 parts of fluorite, 13 parts of cryolite, 25 parts of sodium fluoride and 13 parts of organic water for later use;
s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride in S1 to obtain 330 carbon black powder, medium carbon graphite powder, soil graphite powder, binder powder, industrial soda ash powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder;
s3: and (3) sieving treatment: sieving 330 carbon black powder, medium-carbon graphite powder, earthy graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder in S2;
s4: stirring treatment: sequentially adding 330 carbon black powder, medium-carbon graphite powder, soil-like graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are sieved in S3 into a stirrer for stirring treatment to obtain a mixture;
s5: circulating stirring: adding organic water into the mixture obtained in the step S4, and performing circulating stirring treatment to obtain a uniform mixture;
s6: high-temperature treatment: pumping the mixed material obtained in the step S5 into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the diameter of 0.1-1.5mm being more than or equal to 95%.
In this example, in S2, a grinder is used to grind 330 carbon black, medium carbon graphite, soil graphite, binder, industrial soda, wollastonite, perovskite, blast furnace slag, fluorite, cryolite, and sodium fluoride, and the grinding time is set to 18min, in S3, the fineness of the raw material must reach 300 mesh and the pass rate reaches 96%, in S4, the rotation speed of the stirrer is set to 450r/min, and in S5, the stirring time is set to 65 min.
EXAMPLE III
The formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 17 parts of 330 carbon black, 10 parts of medium carbon graphite, 11 parts of earthy graphite, 7 parts of a binder, 13 parts of industrial soda ash, 9 parts of wollastonite, 17 parts of perovskite, 5 parts of blast furnace slag, 4 parts of fluorite, 14 parts of cryolite, 26 parts of sodium fluoride and 14 parts of organic water.
The embodiment also provides a production process of the low-carbon covering slag containing titanium stainless steel, which comprises the following steps:
s1: preparing raw materials: weighing the following raw materials in parts by weight: 330 parts of carbon black, 10 parts of medium carbon graphite, 11 parts of earthy graphite, 7 parts of a binder, 13 parts of industrial soda ash, 9 parts of wollastonite, 17 parts of perovskite, 5 parts of blast furnace slag, 4 parts of fluorite, 14 parts of cryolite, 26 parts of sodium fluoride and 14 parts of organic water for later use;
s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride in S1 to obtain 330 carbon black powder, medium carbon graphite powder, soil graphite powder, binder powder, industrial soda ash powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder;
s3: and (3) sieving treatment: sieving 330 carbon black powder, medium-carbon graphite powder, earthy graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder in S2;
s4: stirring treatment: sequentially adding 330 carbon black powder, medium-carbon graphite powder, soil-like graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are sieved in S3 into a stirrer for stirring treatment to obtain a mixture;
s5: circulating stirring: adding organic water into the mixture obtained in the step S4, and performing circulating stirring treatment to obtain a uniform mixture;
s6: high-temperature treatment: pumping the mixed material obtained in the step S5 into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the diameter of 0.1-1.5mm being more than or equal to 95%.
In this example, in S2, a grinder is used to grind 330 carbon black, medium carbon graphite, soil graphite, binder, industrial soda, wollastonite, perovskite, blast furnace slag, fluorite, cryolite, and sodium fluoride, and the grinding time is set to 20min, in S3, the fineness of the raw material must reach 300 mesh and the pass rate reaches 96%, in S4, the rotation speed of the stirrer is set to 500r/min, and in S5, the stirring time is set to 70 min.
Example four
The formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 330 parts of carbon black 18, 11 parts of medium carbon graphite, 12 parts of earthy graphite, 8 parts of binder, 14 parts of industrial soda ash, 10 parts of wollastonite, 18 parts of perovskite, 6 parts of blast furnace slag, 5 parts of fluorite, 15 parts of cryolite, 27 parts of sodium fluoride and 15 parts of organic water.
The embodiment also provides a production process of the low-carbon covering slag containing titanium stainless steel, which comprises the following steps:
s1: preparing raw materials: weighing the following raw materials in parts by weight: 330 parts of carbon black 18, 11 parts of medium carbon graphite, 12 parts of earthy graphite, 8 parts of binder, 14 parts of industrial soda ash, 10 parts of wollastonite, 18 parts of perovskite, 6 parts of blast furnace slag, 5 parts of fluorite, 15 parts of cryolite, 27 parts of sodium fluoride and 15 parts of organic water for later use;
s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride in S1 to obtain 330 carbon black powder, medium carbon graphite powder, soil graphite powder, binder powder, industrial soda ash powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder;
s3: and (3) sieving treatment: sieving 330 carbon black powder, medium-carbon graphite powder, earthy graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder in S2;
s4: stirring treatment: sequentially adding 330 carbon black powder, medium-carbon graphite powder, soil-like graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are sieved in S3 into a stirrer for stirring treatment to obtain a mixture;
s5: circulating stirring: adding organic water into the mixture obtained in the step S4, and performing circulating stirring treatment to obtain a uniform mixture;
s6: high-temperature treatment: pumping the mixed material obtained in the step S5 into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the diameter of 0.1-1.5mm being more than or equal to 95%.
In this embodiment, in S2, a grinder is used to grind 330 carbon black, medium carbon graphite, soil graphite, binder, industrial soda, wollastonite, perovskite, blast furnace slag, fluorite, cryolite, and sodium fluoride, and the grinding time is set to 25min, in S3, the fineness of the raw material must reach 300 mesh and the pass rate reaches 96%, in S4, the rotation speed of the stirrer is set to 550r/min, and in S5, the stirring time is set to 75 min.
EXAMPLE five
The formula of the low-carbon covering slag containing titanium stainless steel comprises the following raw materials in parts by weight: 330 carbon black 19 parts, medium carbon graphite 12 parts, soil graphite 13 parts, binder 9 parts, industrial soda 15 parts, wollastonite 11 parts, perovskite 19 parts, blast furnace slag 7 parts, fluorite 6 parts, cryolite 16 parts, sodium fluoride 28 parts and organic water 16 parts.
The embodiment also provides a production process of the low-carbon covering slag containing titanium stainless steel, which comprises the following steps:
s1: preparing raw materials: weighing the following raw materials in parts by weight: 330 carbon black 19 parts, medium carbon graphite 12 parts, soil graphite 13 parts, binder 9 parts, industrial soda 15 parts, wollastonite 11 parts, perovskite 19 parts, blast furnace slag 7 parts, fluorite 6 parts, cryolite 16 parts, sodium fluoride 28 parts and organic water 16 parts for later use;
s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride in S1 to obtain 330 carbon black powder, medium carbon graphite powder, soil graphite powder, binder powder, industrial soda ash powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder;
s3: and (3) sieving treatment: sieving 330 carbon black powder, medium-carbon graphite powder, earthy graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder in S2;
s4: stirring treatment: sequentially adding 330 carbon black powder, medium-carbon graphite powder, soil-like graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are sieved in S3 into a stirrer for stirring treatment to obtain a mixture;
s5: circulating stirring: adding organic water into the mixture obtained in the step S4, and performing circulating stirring treatment to obtain a uniform mixture;
s6: high-temperature treatment: pumping the mixed material obtained in the step S5 into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the diameter of 0.1-1.5mm being more than or equal to 95%.
In this embodiment, in S2, a grinder is used to grind 330 carbon black, medium carbon graphite, soil graphite, binder, industrial soda, wollastonite, perovskite, blast furnace slag, fluorite, cryolite, and sodium fluoride, and the grinding time is set to 30min, in S3, the fineness of the raw material must reach 300 mesh and the passing rate reaches 96%, in S4, the rotation speed of the stirrer is set to 600r/min, and in S5, the stirring time is set to 80 min.
Research on the low-carbon mold flux:
the surface roughness of the mold flux increased as the content of Ti02 became larger, and the surface roughness increased by about 2| xm for every 1% increase of M < TiO 2). As the content of Ti02 increases, the reaction proceeds to the right, and the content of perovskite in the mold flux increases, which is advantageous for nucleation and development of crystals and increases the crystallization rate of perovskite, so that the surface of the mold flux becomes rougher as the content of Ti02 in the mold flux increases.
The low-carbon mold flux prepared in the first to fifth examples was selected and the components of the low-carbon mold flux were measured, and the result was SiO2The content is 35-40%; the CaO content is 28-35%; al (Al)2O3The content is 7-9%; na (Na)2The content of O is 6-9%; the content of F-is 4-7%; ti02The content is 2-10%.
And for example one to example five, Ti0 in the low-carbon mold flux2The specific contents of (A) are counted as shown in the following table:
| examples | Ti02Content (wt.) |
| Example one | 4％ |
| Example two | 2％ |
| EXAMPLE III | 10％ |
| Example four | 8％ |
| EXAMPLE five | 7％ |
It can be known that the low-carbon covering slag Ti0 prepared by the invention2The content is high, so that the surface of the mold flux becomes rougher, and further, the longitudinal cracks on the surface of the slab can be effectively prevented, and the third embodiment is the best embodiment.
Claims (8)
1. The formula of the low-carbon covering slag containing titanium stainless steel is characterized by comprising the following raw materials in parts by weight: 15-19 parts of 330 carbon black, 8-12 parts of medium carbon graphite, 9-13 parts of earthy graphite, 5-9 parts of a binder, 11-15 parts of industrial soda ash, 7-11 parts of wollastonite, 15-19 parts of perovskite, 3-7 parts of blast furnace slag, 2-6 parts of fluorite, 12-16 parts of cryolite, 24-28 parts of sodium fluoride and 12-16 parts of organic water.
2. The formula of the low-carbon mold flux containing titanium stainless steel according to claim 1, wherein the formula comprises the following raw materials in parts by weight: 330 parts of carbon black 15, 8 parts of medium carbon graphite, 9 parts of earthy graphite, 5 parts of a binder, 11 parts of industrial soda ash, 7 parts of wollastonite, 15 parts of perovskite, 3 parts of blast furnace slag, 2 parts of fluorite, 12 parts of cryolite, 24 parts of sodium fluoride and 12 parts of organic water.
3. The formula of the low-carbon mold flux containing titanium stainless steel according to claim 1, wherein the formula comprises the following raw materials in parts by weight: 330 carbon black 19 parts, medium carbon graphite 12 parts, soil graphite 13 parts, binder 9 parts, industrial soda 15 parts, wollastonite 11 parts, perovskite 19 parts, blast furnace slag 7 parts, fluorite 6 parts, cryolite 16 parts, sodium fluoride 28 parts and organic water 16 parts.
4. The production process of the low-carbon covering slag containing titanium stainless steel is characterized by comprising the following steps of:
s1: preparing raw materials: weighing the following raw materials in parts by weight: 15-19 parts of 330 carbon black, 8-12 parts of medium carbon graphite, 9-13 parts of earthy graphite, 5-9 parts of a binder, 11-15 parts of industrial soda ash, 7-11 parts of wollastonite, 15-19 parts of perovskite, 3-7 parts of blast furnace slag, 2-6 parts of fluorite, 12-16 parts of cryolite, 24-28 parts of sodium fluoride and 12-16 parts of organic water for later use;
s2: grinding treatment: grinding 330 carbon black, medium carbon graphite, soil graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride which are described in S1 to obtain 330 carbon black powder, medium carbon graphite powder, soil graphite powder, binder powder, industrial soda ash powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder;
s3: and (3) sieving treatment: sieving 330 carbon black powder, medium-carbon graphite powder, earthy graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are all described in S2;
s4: stirring treatment: sequentially adding 330 carbon black powder, medium-carbon graphite powder, soil-like graphite powder, binder powder, industrial soda powder, wollastonite powder, perovskite powder, blast furnace slag powder, fluorite powder, cryolite powder and sodium fluoride powder which are sieved in S3 into a stirrer for stirring treatment to obtain a mixture;
s5: circulating stirring: adding organic water into the mixture obtained in the step S4, and performing circulating stirring treatment to obtain a uniform mixture;
s6: high-temperature treatment: pumping the mixed material obtained in the step S5 into a high-temperature spray tower through a plunger pump to prepare hollow particle pellets with the diameter of 0.1-1.5mm being more than or equal to 95%.
5. The process for producing the low-carbon mold flux of titanium-containing stainless steel as claimed in claim 4, wherein in S2, 330 carbon black, medium carbon graphite, earthy graphite, a binder, industrial soda ash, wollastonite, perovskite, blast furnace slag, fluorite, cryolite and sodium fluoride are ground by a grinder, and the grinding time is set to 15-30 min.
6. The process for producing the low-carbon covering slag of the titanium-containing stainless steel as claimed in claim 4, wherein in the S3, the fineness of the raw material must reach 300 meshes and the passing rate reaches 96%.
7. The process for producing the low-carbon mold flux containing titanium stainless steel as claimed in claim 4, wherein in S4, the rotation speed of the stirrer is set to 400-600 r/min.
8. The process for producing the low-carbon mold flux of the titanium-containing stainless steel as claimed in claim 4, wherein in the step S5, the stirring time is set to be 60-80 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053684.8A CN113714477A (en) | 2021-09-09 | 2021-09-09 | Formula and production process of low-carbon covering slag containing titanium stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053684.8A CN113714477A (en) | 2021-09-09 | 2021-09-09 | Formula and production process of low-carbon covering slag containing titanium stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113714477A true CN113714477A (en) | 2021-11-30 |
Family
ID=78682841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111053684.8A Pending CN113714477A (en) | 2021-09-09 | 2021-09-09 | Formula and production process of low-carbon covering slag containing titanium stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113714477A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116586576A (en) * | 2023-07-14 | 2023-08-15 | 张家口汇德冶金材料有限公司 | Continuous casting large round billet low-carbon steel covering slag and preparation method thereof |
| CN116871472A (en) * | 2023-07-13 | 2023-10-13 | 张家口汇德冶金材料有限公司 | Aluminum-containing middle rolling plate covering slag |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02220746A (en) * | 1989-02-20 | 1990-09-03 | Kawasaki Steel Corp | Mold powder for continuous casting for ti-containing dead soft carbon steel |
| CN1481954A (en) * | 2003-04-30 | 2004-03-17 | 重庆大学 | Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same |
| CN101219465A (en) * | 2007-11-30 | 2008-07-16 | 西峡龙成冶金材料有限公司 | Continuous casting crystallizer casting powder special for bar plate stainless steel containing titanium and manufacturing technique thereof |
| CN107931551A (en) * | 2017-12-27 | 2018-04-20 | 河南通宇冶材集团有限公司 | A kind of bloom middle low carbon steel covering slag and preparation method thereof |
| CN111531140A (en) * | 2020-05-22 | 2020-08-14 | 攀钢集团攀枝花钢铁研究院有限公司 | High titanium oxide continuous casting covering slag for titanium-containing steel |
| CN111644582A (en) * | 2020-06-17 | 2020-09-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Tundish covering agent for titanium-containing steel and preparation method and application thereof |
-
2021
- 2021-09-09 CN CN202111053684.8A patent/CN113714477A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02220746A (en) * | 1989-02-20 | 1990-09-03 | Kawasaki Steel Corp | Mold powder for continuous casting for ti-containing dead soft carbon steel |
| CN1481954A (en) * | 2003-04-30 | 2004-03-17 | 重庆大学 | Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same |
| CN101219465A (en) * | 2007-11-30 | 2008-07-16 | 西峡龙成冶金材料有限公司 | Continuous casting crystallizer casting powder special for bar plate stainless steel containing titanium and manufacturing technique thereof |
| CN107931551A (en) * | 2017-12-27 | 2018-04-20 | 河南通宇冶材集团有限公司 | A kind of bloom middle low carbon steel covering slag and preparation method thereof |
| CN111531140A (en) * | 2020-05-22 | 2020-08-14 | 攀钢集团攀枝花钢铁研究院有限公司 | High titanium oxide continuous casting covering slag for titanium-containing steel |
| CN111644582A (en) * | 2020-06-17 | 2020-09-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Tundish covering agent for titanium-containing steel and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 苗胜田;文光华;唐萍;: "无氟含钛保护渣表面粗糙度研究" * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116871472A (en) * | 2023-07-13 | 2023-10-13 | 张家口汇德冶金材料有限公司 | Aluminum-containing middle rolling plate covering slag |
| CN116871472B (en) * | 2023-07-13 | 2024-03-08 | 张家口汇德冶金材料有限公司 | Aluminum-containing middle rolling plate covering slag |
| CN116586576A (en) * | 2023-07-14 | 2023-08-15 | 张家口汇德冶金材料有限公司 | Continuous casting large round billet low-carbon steel covering slag and preparation method thereof |
| CN116586576B (en) * | 2023-07-14 | 2023-10-10 | 张家口汇德冶金材料有限公司 | Continuous casting large round billet low-carbon steel covering slag and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113714477A (en) | Formula and production process of low-carbon covering slag containing titanium stainless steel | |
| CN101658907B (en) | Protective slag of large-profile round billet continuous-casting crystallizer and method for preparing same | |
| US10092948B2 (en) | Fluoride-free continuous casting mold flux for low-carbon steel | |
| CN101745615B (en) | Function protecting material of continuous casting crystallizer for large square low-carbon steel | |
| CN109894588B (en) | Special all-endless high-efficiency continuous casting protective slag for ESP (electronic stability program) low-carbon steel and preparation method thereof | |
| CN102398003B (en) | Crystallizer covering slag for continuous casting and method for continuously casting medium and low-carbon steel round billets | |
| CN101637808A (en) | ASP medium thickness slab high drawing speed plate blank low-carbon steel continuous casting functional protective material | |
| CN112355261B (en) | Crystallizer casting powder suitable for producing peritectic steel through efficient continuous casting | |
| CN102218514A (en) | Medium and low carbon steel continuous casting mold powder as well as preparation method thereof and continuous casting method | |
| CN110315039A (en) | A kind of application of Mold Powder Without Fluorine in Ti-containing steel continuous casting | |
| CN101817065B (en) | Function protecting material of large plate blank high-carbon steel continuous casting crystallizer | |
| CN107297475A (en) | A kind of high alumina steel continuous casting crystallizer Mold Powder Without Fluorine | |
| CN111974957A (en) | Continuous casting crystallizer casting powder for medium carbon rare earth steel plate | |
| CN112756570A (en) | Continuous casting start-up slag for casting peritectic steel | |
| CN113953473B (en) | Covering slag for continuous casting crystallizer and preparation method thereof | |
| CN112705678B (en) | Continuous casting crystallizer covering slag for hot work die steel slab and application thereof | |
| CN106111952B (en) | A kind of mould steel ingot casting powder | |
| CN101745617B (en) | Function protection material for special continuous casting crystallizer of high-pressure boiler tube steel | |
| CN114799103A (en) | non-Newtonian fluid continuous casting covering slag for low-carbon steel and preparation method thereof | |
| CN111604483A (en) | Super-high pulling speed sheet billet continuous casting covering slag for medium-carbon low-alloy steel | |
| JP3249429B2 (en) | Mold powder for continuous casting of steel | |
| CN104511581B (en) | A kind of cold rolling tin plate molten steel flux | |
| CN102019383A (en) | Special functional protection material of continuous casting crystallizer for alloy tool steel | |
| CN107584090B (en) | A kind of medium carbon steel Mold Powder Without Fluorine adding Composite Nucleation Agents | |
| CN117206481B (en) | Covering slag for high-pulling-speed continuous casting of high-carbon steel square billets and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211130 |
|
| RJ01 | Rejection of invention patent application after publication |