WO1992009386A1 - Poudre exothermique de moulage destinee a la coulee continue - Google Patents
Poudre exothermique de moulage destinee a la coulee continue Download PDFInfo
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- WO1992009386A1 WO1992009386A1 PCT/JP1991/000967 JP9100967W WO9209386A1 WO 1992009386 A1 WO1992009386 A1 WO 1992009386A1 JP 9100967 W JP9100967 W JP 9100967W WO 9209386 A1 WO9209386 A1 WO 9209386A1
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- weight
- powder
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- raw material
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- 239000000843 powder Substances 0.000 title claims abstract description 77
- 238000009749 continuous casting Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 66
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 23
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 19
- 239000010703 silicon Substances 0.000 claims abstract description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000676 Si alloy Inorganic materials 0.000 claims abstract description 16
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- 230000004907 flux Effects 0.000 claims abstract description 12
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims abstract description 10
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 3
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 3
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000002585 base Substances 0.000 claims description 10
- 230000005070 ripening Effects 0.000 claims description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 6
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 6
- 238000010924 continuous production Methods 0.000 claims description 6
- 150000002823 nitrates Chemical class 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 abstract description 14
- 230000003647 oxidation Effects 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 9
- 230000020169 heat generation Effects 0.000 abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 23
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000010959 steel Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 15
- 239000000047 product Substances 0.000 description 13
- 239000002893 slag Substances 0.000 description 11
- 239000011734 sodium Substances 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000007983 Tris buffer Substances 0.000 description 8
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000006028 limestone Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229910000882 Ca alloy Inorganic materials 0.000 description 3
- 239000005909 Kieselgur Substances 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 229910001610 cryolite Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- -1 for example Inorganic materials 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 3
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 235000013024 sodium fluoride Nutrition 0.000 description 3
- 239000011775 sodium fluoride Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- ZDQYSKICYIVCPN-UHFFFAOYSA-L sodium succinate (anhydrous) Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O ZDQYSKICYIVCPN-UHFFFAOYSA-L 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- 229910014458 Ca-Si Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910021540 colemanite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000011181 potassium carbonates Nutrition 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229940074404 sodium succinate Drugs 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite 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
-
- 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
- B22D11/07—Lubricating the moulds
-
- 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
Definitions
- the present invention relates to a heat-generating mold powder for continuous tetsu-toku, in which the exothermic property is imparted to the mold powder for continuous tetsu-toku.
- the present invention provides a heat-generating mold powder for continuous tsutsuten construction, particularly, a product having a low carburization and reducing surface defects such as inclusions and pinholes. Can be molded. It is a fight for the Uda.
- the mold paddle for continuous steel casting is added onto the molten surface poured into the mold, and the molten steel is cooled from the molten steel surface by the heat received from the molten steel. It forms a layered structure consisting of a lag layer, a tie layer and an unmelted raw powder layer, and is gradually consumed while playing various roles.
- the main roles are (1) the lubrication between the mold and the solidified shell, (2) the dissolution and absorption of inclusions floating from the molten steel, and (3) the heat retention of the molten steel. It is.
- Mold powders are quality-designed to conform to various steel components and various conditions. It is.
- 1 and 2 are most important to adjust properties such as softening point and viscosity, and the selection of chemical composition is important.
- Et al recently is to ensure the molten steel temperature in one step advanced molding de intraocular varnish mosquito scan position place the 3, in order that to improve the ⁇ quality, C a - S i, the metal heating member, such as A 1 Is contained in the powder, which generates an exothermic reaction due to oxidation in the mold and supplies heat to the molten steel.
- the molten steel is quickly melted after the reaction, and the same as ordinary powder after the melting.
- Exothermic front powders that exhibit behavior, and powders for ripening main bodies, are desired.
- the front powder refers to the powder used for unsteady manufacturing (at the start of manufacturing, when replacing the stand), and the body powder. , Used during steady rusting. Let's go to Uda.
- exothermic powders not only provide heat from the ripening reaction, but also after the exothermic reaction must play the role of the powder as described above.
- Various problems remain.
- Japanese Patent Application Laid-Open No. 48-97735 discloses a mold powder to which silicon, fu-silicon, and calcium-silicon are added as exothermic substances. Daichi is disclosed. According to the official report, while these exothermic substances act as slag control agents, they react with oxygen in the atmosphere to produce heat of combustion. Has been disclosed.
- the metal powder added as a heat-generating substance becomes an oxide only when it reacts with oxygen in the air in a solid state or in a liquid state after melting, and becomes a molten powder. Because it is absorbed during the dozen lags, it is easy to generate various problems.
- Injection gas such as argon enters the mold and floats in the mold, so the oxidation rate of the metal is not stable, and unreacted metal remains and melts in the molten powder slag. It is easy to be rolled up inside and hinders the lubricating properties of the nodder lag film. On the other hand, it causes a pick-up of unreacted metal into the inside and the origin of inclusions. It is not practical because it causes deterioration of piece quality.
- JP-A-53-70039 and JP-A-58-154445 disclose aluminum, aluminum alloys, calcium, and calcium alloys. However, since these additives contain an active substance, they are not practical in view of the above-mentioned (II).
- Japanese Patent Publication No. 57-7211 proposes a powder containing a Ca-Si alloy, and there is no description of the exothermic reaction, but its implementation has been described. Judging from the examples, it is a method of obtaining combustion ripening by the reaction of metal with atmospheric oxygen, and has the same disadvantages as the technology described in the above-mentioned JP-A-48-97735. However, it is not practical in terms of (i) and (iii) above.
- Japanese Patent Application Laid-Open No. 64-66056 discloses a carbon content.
- a strong reducing substance such as a metal is used to make the groove not / 0.
- the gas from the refractory for continuous smelting is required.
- argon gas enters into the mold and floats, so that the oxidation rate of the strong reducing substance is difficult to stabilize.
- the exothermic reaction is not stable and cannot be obtained, and the unreacted additive remains and is easily entangled in the molten powder slag and into the molten metal.
- ⁇ Practical as it causes deterioration of chip quality, such as impairing the lubricating properties of Darsag finolem, contaminating unreacted substances in the air, and causing inclusions. It is not a target.
- the present inventors have conducted various studies to solve the above problems. As a result, they have found that it is possible to overcome all the drawbacks of the conventional heat generating powder as described above.
- a raw material of a base material having a content of 20 to 90% by weight and a Si02 content of 50% by weight or more is 0 to: L0 weight.
- the present invention provides a heat-molding powder for continuous sintering, characterized in that the powder contains 3 to 30% by weight.
- the present invention relates to a raw material of a base material having a content of 20 to 90% by weight and a Si0 2 content of 50% by weight or more 0 to: L0% by weight; One or two selected from the group consisting of 0 to 20% by weight of a flux material and alkali metal carbonates, bicarbonates and nitrates as heating materials It contains 2 to 30% by weight of the above, and 3 to 30% by weight of silicon and Z or a silicon alloy as a reducing material, and unavoidable free carbon is contained. It is intended to provide a heat-generating mold powder for continuous tsutetsu, which is characterized by being 0.5% by weight or less.
- the present invention provides a method for producing a base material 30.
- a base material 30 Up to 90% by weight, silica with a SiO 2 content of 50% by weight or more 0 to 15% by weight, flux raw material 0 to 20% by weight, alkali metal as ripening material
- alkali metal as ripening material
- the present invention is characterized in that the above-mentioned molded powder contains 0 to 30 weight of a flame suppressor made of iron oxide.
- the present invention provides a heat-generating mold powder for continuous production.
- a drawback of many of the conventional heat-generating mold padders is that most of the heat source is not compatible with the metal itself, which is the heating material, or with oxygen in the atmosphere or other oxidizing materials. It depends on the heat of reaction.
- the ripening material is made of carbonate, hydrogencarbonate and nitrate of metal alloy.
- One or more selected from the group is selected from the group consisting of carbon, silicon, and silicon alloy as the reducing agent. Or two or more types are used.
- the exothermic material when the exothermic mold powder for continuous tsunetting is put into the mold, the exothermic material quickly reacts with the reducing material to generate heat of the exothermic reaction due to oxidation of the reducing material.
- the reduction of the heating material produces alkali metal, for example, sodium gas, which in turn is converted to sodium gas. By reacting with oxygen in the atmosphere, large combustion heat can be obtained quickly.
- the reaction between the heat generating material and the reducing material is remarkably fast, and the oxidation of alkali metal, for example, sodium, is suppressed. Since the reaction is between gas and gas, the reaction speed is high and stable, and the above-mentioned disadvantages can be overcome.
- the amount of ripening agent and reducing agent added is 3 to 30 weight respectively.
- % Is desired If the addition amount is less than 3% by weight, the heat of reaction is small and there is no effect. On the other hand, if the content exceeds 30% by weight, the calorific value becomes too large, the flame is generated, and the inside of the mold becomes difficult to see. It is not good.
- the carbonaceous raw material also acts as a reducing material, reacts with the heat generation material and oxidizes it, while reducing the oxygen partial pressure of the raw powder layer and the sintered layer. Fulfill. That is, due to the low oxygen partial pressure of the raw powder layer and the sintered layer, in the oxidation process of silicon or silicon alloy, an oxide layer of SiO 2 is formed on the surface. Since it is not formed and generates s ⁇ o gas, a fresh metal surface is always exposed on the surface, and the oxidation reaction proceeds smoothly and promptly.
- the amount of the heating material be 2 to 30% by weight. If the addition amount is less than 2% by weight, the heat of reaction is small and there is no effect. On the other hand, when the content exceeds 30% by weight, the calorific value becomes too large, and Raw is big and not good. Further, after the exothermic reaction is completed, the exothermic material plays a role as a molten flux.
- the reducing material it is possible to use only carbon, only silicon or a silicon alloy, or a mixture thereof. However, when using ultra-low carbon steel, it is possible to use silicon or a silicon alloy alone or as a mixture. I like it.
- the powder has a low carbon content.However, simply reducing the carbon content causes many problems as described above. cause . Therefore, in this case, the use of a controlled proportion of carbon and silicon or silicon alloy is preferred. That is, in this case, as the reducing material,
- the carbonaceous raw material contains 0.5 to 5% by weight and 1 to 20% by weight of silicon or silicon alloy or both. .
- the amount of the carbonaceous raw material is preferably 0.5 to 5% by weight. If it is less than 0.5% by weight, the oxygen partial pressure of the unmelted layer and the sintered layer does not decrease, and the oxidation of silicon or silicon alloy does not easily proceed smoothly, which is not preferable. . If the content exceeds 5% by weight, carbon becomes excessive, and unreacted solid carbon tends to remain at the interface between the sintered layer and the molten slag layer, resulting in a source of carburization. It is not preferred because it may cause a problem.
- the addition amount of silicon or silicon alloy or both is 1 to 20% by weight. If the added amount is less than 1% by weight, the reaction heat is small and there is no effect. On the other hand, if the content exceeds 20% by weight, the flame is unfavorably large.
- the molding powder of the present invention in addition to the above-mentioned heat generating system composed of the heat generating material and the reducing material, in addition to the heat generating system composed of the heat generating material and the reducing material, the base material raw material, the silica raw material, and the flash It is composed of raw materials and other combinations.
- the amount of the base material added is in the range of 20 to 90% by weight, preferably 30 to 90% by weight. If the addition amount is less than 20% by weight, the addition amount of other raw materials becomes relatively large, and the essential role of the mold padder such as the lubricating effect and the absorbing effect of inclusions is obtained. I don't like it because I can't do it. On the other hand, when the content exceeds 90% by weight, the amount of other raw materials to be added becomes relatively small, the heat generation becomes small, and the bulk specific gravity and the expansion increase. It is not preferable because it is difficult to adjust powder characteristics such as properties.
- the raw material of silica is used for adjusting and adjusting the bulk specific gravity of the mold node and the Ca 0 / Si 2 weight ratio of the powder in oxide conversion.
- the amount of the silica raw material is usually in the range of 0 to 15% by weight.
- the flux raw material is used to adjust the melting characteristics of the mold paddle, and is used for sodium fluoride, cryolite, and fluorite. , Barium carbonate, boric acid, borax, colemanite, magnesium fluoride, lithium fluoride, aluminum fluoride, manganese oxide, etc.
- the flux materials used in the soldering and soldering can be used.
- the amount of the flux material added is in the range of 0 to 20% by weight. It is. If the added amount exceeds 20% by weight, a composition change due to evaporation occurs during melting, and the immersion nozzle that injects molten steel into the mold is severely damaged. Not good for it.
- oxidant as a flame suppressant as an oxygen supply source.
- the sodium gas can be quickly oxidized and burned without lowering the calorific value, and the flame can be suppressed. That is, iron oxide can be added as a flame suppressant within a range of 30% by weight or less. When the content exceeds 30% by weight, iron generated by reduction by the sodium gas does not immediately dissolve into the molten steel, but remains in the mold powder, and the inherent characteristics of the mold powder Not preferred to inhibit
- the exothermic mold powder for continuous production of the present invention is in the form of a powder obtained by mixing the above-mentioned powder raw materials, or is extruded, stirred, fluidized, tumbled, and sprayed. It can be used in the form of granules granulated by a method such as granulation.
- Table 1 shows the formulations of the product of the present invention and the comparative product, and the results of use in an actual machine.
- Table 2 below The following describes other formulations of the product of the present invention and the comparative product, and the results of use in actual machines.
- the products No. 4 and N 0.13 of the present invention are granules obtained by kneading a powdered raw material mixture with water and kneading the mixture into a columnar shape by an extrusion granulator. And a powdered product obtained by mixing a powder blend with a V-type mixer.
- the carbon content of ultra-low coal, low coal, medium coal, and stainless steel is less than 0.01%, 0.01% or more and 0.08% or less, respectively. It is not less than 08% and less than 0.22% and not more than 0.15%.
- trial is the number of test days
- ch is the number of charges.
- the figures of the tsutsune inclusion inclusion index indicate the ratio of the number produced based on Example 1.
- Carbon black 1 2 2 1 1 2 1 Form Powder Powder Powder Granule Powder Powder Powder Powder Powder Powder Powder Powder Powder Powder Powder Powder
- the exothermic mold powder for continuous production of the present invention shows excellent workability and exothermicity for the front and the main body in various steel types, and includes inclusions, binholes, etc. It is possible to supply a small number of tetsu pieces with no defects.
- one or more selected from the group consisting of alkali metal carbonates, bicarbonates, and nitrates as the heat generating material, and as the reducing material The carbonaceous raw material and the silicon or silicon alloy or both are added and blended, do not cause carburization, have excellent heat retention, and It is possible to provide a mold powder that does not cause the contamination of steel by unreacted substances.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91913081A EP0513357B1 (en) | 1990-11-30 | 1991-07-19 | Exothermic mold powder for continuous casting |
| DE69128029T DE69128029T2 (de) | 1990-11-30 | 1991-07-19 | Exothermes giesspulver für das stranggiessen |
| KR1019920700414A KR960002403B1 (ko) | 1990-11-30 | 1991-07-19 | 연속 주조용 발열형 몰드 파우더 |
| CA002064469A CA2064469C (en) | 1990-11-30 | 1991-07-19 | Exothermic type mold additives for continuous casting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2/330463 | 1990-11-30 | ||
| JP2330463A JPH0673730B2 (ja) | 1990-11-30 | 1990-11-30 | 連続鋳造用発熱型モールドパウダー |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992009386A1 true WO1992009386A1 (fr) | 1992-06-11 |
Family
ID=18232907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1991/000967 WO1992009386A1 (fr) | 1990-11-30 | 1991-07-19 | Poudre exothermique de moulage destinee a la coulee continue |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5263534A (en, 2012) |
| EP (1) | EP0513357B1 (en, 2012) |
| JP (1) | JPH0673730B2 (en, 2012) |
| KR (1) | KR960002403B1 (en, 2012) |
| AT (1) | ATE159438T1 (en, 2012) |
| CA (1) | CA2064469C (en, 2012) |
| DE (1) | DE69128029T2 (en, 2012) |
| WO (1) | WO1992009386A1 (en, 2012) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69934083T2 (de) * | 1998-07-21 | 2007-06-21 | Shinagawa Refractories Co., Ltd. | Giesspulver zum stranggiessen von dünnbrammen und stranggiessverfahren |
| JP4508086B2 (ja) * | 2005-11-14 | 2010-07-21 | 住友金属工業株式会社 | 鋼の連続鋳造用モールドパウダーおよび連続鋳造方法 |
| JP4650452B2 (ja) * | 2007-04-19 | 2011-03-16 | 住友金属工業株式会社 | 鋼の連続鋳造方法 |
| WO2011006649A1 (en) * | 2009-07-14 | 2011-01-20 | Corus Staal Bv | Casting mould powder |
| WO2011049698A2 (en) | 2009-10-19 | 2011-04-28 | Micropyretics Heaters International, Inc. | Clean green energy electric protectors for materials |
| KR101159930B1 (ko) * | 2009-12-24 | 2012-06-25 | 현대제철 주식회사 | 충격 보증용 빔블랭크의 연속 주조 방법 |
| RU2661981C1 (ru) * | 2017-05-30 | 2018-07-23 | Мария Павловна Никифорова | Состав для теплоизоляции расплава металла и способ изготовления состава |
| RU2671786C1 (ru) * | 2017-10-05 | 2018-11-06 | Станислав Владимирович Трунов | Сырьевая смесь для получения гранулированной теплоизолирующей смеси, гранулированная теплоизолирующая смесь и способ ее получения |
| JP7024478B2 (ja) * | 2018-02-14 | 2022-02-24 | 日本製鉄株式会社 | 連続鋳造用モールドパウダー及び連続鋳造方法 |
| CN108956259B (zh) * | 2018-06-20 | 2021-03-23 | 攀钢集团西昌钢钒有限公司 | 一种连铸保护渣中游离碳的检测方法 |
| CN113305275B (zh) * | 2020-02-26 | 2022-10-21 | 宝山钢铁股份有限公司 | 宽厚板连铸用包晶钢保护渣 |
| CN112981043B (zh) * | 2021-01-04 | 2022-08-26 | 湖南紫荆新材料科技有限公司 | 一种无氟钢水净化剂及其制备方法 |
| CN113290216B (zh) * | 2021-06-07 | 2022-09-16 | 西峡龙成冶金材料有限公司 | 一种不锈钢连铸用开浇渣及其应用 |
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| JPS6127150A (ja) * | 1984-07-17 | 1986-02-06 | Nippon Steel Corp | 鋼の連続鋳造方法 |
| JPH01104452A (ja) * | 1987-10-19 | 1989-04-21 | Shinagawa Refract Co Ltd | 鋼の連続鋳造用鋳型添加剤 |
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| GB1243837A (en) * | 1968-11-08 | 1971-08-25 | Inst Zuschlagstoffe Und Naturs | Method of production for synthetic wollastonite |
| DE1912354B2 (de) * | 1969-03-12 | 1972-04-13 | Reimbold & Strick, 5000 Köln-Kalk | Synthetisches kristallines calciumsilikat und verfahren zu seiner herstellung |
| JPS4835133B1 (en, 2012) * | 1970-08-12 | 1973-10-26 | ||
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| US3937269A (en) * | 1974-04-08 | 1976-02-10 | Crucible Inc | Mold powder composition and method for continuously casting employing the same |
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| GB1514185A (en) * | 1976-08-05 | 1978-06-14 | Robson Refractories Ltd | Metal casting process using a flux addition |
| JPS5370039A (en) * | 1976-12-02 | 1978-06-22 | Kobe Steel Ltd | Exothermic flux for continuous casting |
| SU638620A1 (ru) * | 1977-05-06 | 1978-12-27 | Центральный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Черной Металлургии Им.И.П.Бардина | Рафинирующа смесь дл разливки стали |
| US4204864A (en) * | 1978-04-19 | 1980-05-27 | Scm Corporation | Particulate slagging composition for the continuous casting of steel |
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| US4290809A (en) * | 1980-08-06 | 1981-09-22 | Mobay Chemical Corporation | Raw mix flux for continuous casting of steel |
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- 1990-11-30 JP JP2330463A patent/JPH0673730B2/ja not_active Expired - Fee Related
-
1991
- 1991-07-19 KR KR1019920700414A patent/KR960002403B1/ko not_active Expired - Fee Related
- 1991-07-19 AT AT91913081T patent/ATE159438T1/de not_active IP Right Cessation
- 1991-07-19 DE DE69128029T patent/DE69128029T2/de not_active Revoked
- 1991-07-19 EP EP91913081A patent/EP0513357B1/en not_active Revoked
- 1991-07-19 US US07/809,550 patent/US5263534A/en not_active Expired - Fee Related
- 1991-07-19 CA CA002064469A patent/CA2064469C/en not_active Expired - Lifetime
- 1991-07-19 WO PCT/JP1991/000967 patent/WO1992009386A1/ja not_active Application Discontinuation
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| JPS6127150A (ja) * | 1984-07-17 | 1986-02-06 | Nippon Steel Corp | 鋼の連続鋳造方法 |
| JPH01104452A (ja) * | 1987-10-19 | 1989-04-21 | Shinagawa Refract Co Ltd | 鋼の連続鋳造用鋳型添加剤 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR920702264A (ko) | 1992-09-03 |
| DE69128029T2 (de) | 1998-03-05 |
| JPH04200962A (ja) | 1992-07-21 |
| ATE159438T1 (de) | 1997-11-15 |
| CA2064469A1 (en) | 1992-05-31 |
| EP0513357A1 (en) | 1992-11-19 |
| DE69128029D1 (de) | 1997-11-27 |
| KR960002403B1 (ko) | 1996-02-17 |
| CA2064469C (en) | 1998-12-29 |
| US5263534A (en) | 1993-11-23 |
| EP0513357B1 (en) | 1997-10-22 |
| EP0513357A4 (en, 2012) | 1994-02-16 |
| AU643549B2 (en) | 1993-11-18 |
| JPH0673730B2 (ja) | 1994-09-21 |
| AU8216991A (en) | 1992-06-25 |
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