CN115971722A - Welding rod for welding magnesium smelting reduction pot and preparation method thereof - Google Patents
Welding rod for welding magnesium smelting reduction pot and preparation method thereof Download PDFInfo
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- CN115971722A CN115971722A CN202211584841.2A CN202211584841A CN115971722A CN 115971722 A CN115971722 A CN 115971722A CN 202211584841 A CN202211584841 A CN 202211584841A CN 115971722 A CN115971722 A CN 115971722A
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- 238000003466 welding Methods 0.000 title claims abstract description 298
- 230000009467 reduction Effects 0.000 title claims abstract description 113
- 238000003723 Smelting Methods 0.000 title claims abstract description 96
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000011777 magnesium Substances 0.000 title claims abstract description 64
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 230000004907 flux Effects 0.000 claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 24
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 20
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 19
- 239000010436 fluorite Substances 0.000 claims abstract description 19
- -1 rare earth fluoride Chemical class 0.000 claims abstract description 18
- 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 abstract description 16
- RRZKHZBOZDIQJG-UHFFFAOYSA-N azane;manganese Chemical compound N.[Mn] RRZKHZBOZDIQJG-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 16
- 229910001610 cryolite Inorganic materials 0.000 claims abstract description 16
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 16
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004579 marble Substances 0.000 claims abstract description 15
- 229910001309 Ferromolybdenum Inorganic materials 0.000 claims abstract description 14
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000010433 feldspar Substances 0.000 claims abstract description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 20
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 20
- 239000011812 mixed powder Substances 0.000 claims description 18
- 235000019353 potassium silicate Nutrition 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 9
- 235000017550 sodium carbonate Nutrition 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 10
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006722 reduction reaction Methods 0.000 description 99
- 239000002245 particle Substances 0.000 description 21
- 235000013305 food Nutrition 0.000 description 11
- 239000002893 slag Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 229910052665 sodalite Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229940072033 potash Drugs 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 235000015320 potassium carbonate Nutrition 0.000 description 4
- 229910052656 albite Inorganic materials 0.000 description 3
- 238000006356 dehydrogenation reaction Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 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 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910018643 Mn—Si Inorganic materials 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008446 instant noodles Nutrition 0.000 description 1
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Nonmetallic Welding Materials (AREA)
Abstract
The invention aims to provide a welding rod for welding a magnesium smelting reduction pot and a preparation method thereof, which comprises a steel core and a welding agent, the welding flux is uniformly distributed on the outer side of the steel core, and comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 30 to 40 percent of marble, 10 to 15 percent of fluorite, 5 to 10 percent of cryolite, 0.5 to 2 percent of rutile, 2 to 5 percent of silicon iron, 5 to 10 percent of manganese nitride, 2 to 5 percent of potash-soda feldspar 1 to 3 percent of potassium titanate, 5 to 8 percent of ferrotitanium, 0.1 to 1 percent of ferromolybdenum, 0.1 to 1 percent of rare earth fluoride, 0.5 to 1 percent of sodium carbonate and 0.1 to 1 percent of sodium carboxymethylcellulose, the balance being iron powder. The deposited metal formed by the welding rod of the invention can ensure the welded joint has good high temperature resistance and corrosion resistance, thereby prolonging the service life of the reduction tank, and the controllability of the welding rod is good and the welding efficiency is higher.
Description
Technical Field
The invention relates to the technical field of welding wires, in particular to a welding rod for welding a magnesium smelting reduction tank and a preparation method thereof.
Background
The magnesium smelting process is mainly produced by Pidgeon process, that is, calcined dolomite, ferrosilicon and fluorite are ground and pelletized according to a certain proportion, the pellets are added into a reduction tank, the reduction tank is made of heat-resistant alloy steel, the temperature in the reduction tank is kept at 1150-1200 ℃, the vacuum degree is about 10-20 Pa, reduction reaction is carried out at high temperature, and the generated magnesium vapor flows to a cooling area with a crystallization water jacket and is condensed into crystallized magnesium. In the refining process, the reduction tank is not only subjected to high-temperature oxidation at the temperature of nearly 1200 ℃, but also subjected to corrosion of high-temperature gas media in the furnace, and once the welding seam on the reduction tank has defects of depression, cracks and the like, the vacuum environment in the furnace is damaged, so that the reduction reaction cannot be carried out, the whole reduction tank is scrapped, and huge economic loss is caused.
Disclosure of Invention
The invention aims to provide a welding rod for welding a magnesium smelting reduction pot and a preparation method thereof, deposited metal formed by the welding rod can ensure that a welding joint has good high temperature resistance and corrosion resistance, thereby prolonging the service life of the reduction tank, and the controllability of the welding rod is good and the welding efficiency is higher.
To meet the above technical objects and the related technical objects, the present invention provides an electrode for welding a magnesium reduction pot, which comprises a steel core and a flux, the welding flux is uniformly distributed on the outer side of the steel core, and comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 30 to 40 percent of marble, 10 to 15 percent of fluorite, 5 to 10 percent of cryolite, 0.5 to 2 percent of rutile, 2 to 5 percent of ferrosilicon, 5 to 10 percent of manganese nitride, 2 to 5 percent of potash-sodalite, 1 to 3 percent of potassium titanate, 5 to 8 percent of ferrotitanium, 0.1 to 1 percent of ferromolybdenum, 0.1 to 1 percent of rare earth fluoride, 0.5 to 1 percent of calcined soda, 0.1 to 1 percent of sodium carboxymethylcellulose, and the balance of iron powder.
In an example of the welding rod for welding the magnesium-smelting reduction tank, the steel core is a stainless steel core, and the stainless steel core comprises the following components in percentage by mass based on the total mass of the stainless steel core: c: less than or equal to 0.15 percent, mn:1.0 to 2.5%, si: less than or equal to 0.65 percent, S: less than or equal to 0.03%, P: less than or equal to 0.03%, cr:28 to 32%, ni:8 to 10.5%, mo: less than or equal to 0.75 percent, cu: less than or equal to 0.75 percent by weight, the balance being Fe and some unavoidable impurities.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the addition amount of the marble is 35 to 40%.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the addition amount of the fluorite is 12-15%.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the cryolite is added in an amount of 6 to 9%.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the rutile is added in an amount of 1 to 2%.
In the magnesium smelting reduction pot in one example of a welding electrode for welding, the addition of the ferrosilicon is 3-4%.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the manganese nitride is added in an amount of 6 to 9%.
In an example of the welding rod for welding the magnesium-making reduction pot of the present invention, the addition amount of the potash feldspar is 3-4%.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the amount of the potassium titanate added is 1 to 2%.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the amount of the ferromolybdenum added is 0.5 to 1%.
In an example of the welding rod for welding the magnesium smelting reduction pot, the addition amount of the rare earth fluoride is 0.5-1%.
In an example of the welding rod for welding the magnesium smelting reduction pot, the addition amount of the sodium carboxymethyl cellulose is 0.5-1%.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the marble has a particle size of 40 to 50 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot according to the present invention, the fluorite has a particle size of 40 to 50 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot according to the present invention, the cryolite has a particle size of 60 to 70 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the rutile has a particle size of 40 to 50 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot according to the present invention, the ferrosilicon has a grain size of 60 to 70 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the manganese nitride has a particle size of 70 to 80 mesh.
In an example of the welding rod for welding the magnesium smelting reduction pot, the particle size of the potash albite is 40-50 meshes.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the particle size of the potassium titanate is 60 to 70 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the particle size of the ferrotitanium is 60 to 70 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the grain size of the ferromolybdenum is 60 to 70 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the particle size of the rare earth fluoride is 70 to 80 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the particle size of the soda ash is 60 to 70 mesh.
In an example of the welding rod for welding the magnesium-smelting reduction pot, the particle size of the sodium carboxymethyl cellulose is 60-70 meshes.
In an example of the welding rod for welding the magnesium-smelting reduction pot of the present invention, the particle size of the iron powder is 40 to 50 mesh.
In an example of the welding rod for welding the magnesium-making reduction pot of the present invention, the mass percentage of the welding flux is 20-30% of the total mass of the welding rod for welding the magnesium smelting reduction pot.
In an example of the welding rod for welding the magnesium smelting reduction pot of the present invention, the diameter of the welding rod for welding the magnesium smelting reduction pot is 2.5 to 5.0mm.
The invention also provides a preparation method of the welding rod for welding the magnesium smelting reduction pot, which comprises the following preparation steps:
s1, screening and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, and uniformly stirring and mixing to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying to obtain the welding rod for welding the magnesium smelting reduction tank.
In an example of the method for manufacturing the welding rod for welding the magnesium-smelting reduction pot, in step S2, the amount of the water glass binder added is 21 to 24 percent of the total mass of the flux powder.
In an example of the method for manufacturing the welding rod for welding the magnesium-making reduction pot according to the present invention, in step S2, the stirring and mixing time of the stirrer is 60 to 90min.
In an example of the preparation method of the welding rod for welding the magnesium smelting reduction pot, in the step S3, the drying temperature for drying is 350-370 ℃, and the drying time is 2-4 h.
The flux-cored material of the invention has the following functions:
and (3) marble: the main gas-forming agent and slag-forming agent are decomposed into CO during welding 2 Gas and CaO protect the molten pool and reduce the sensitivity of air holes.
Fluorite: the main component is CaF 2 The melting point and viscosity of the slag are adjusted, the slag removal performance is enhanced, and the weld forming is improved.
Cryolite: mainly comprises sodium fluoroaluminate, has similar action with fluorite, and can adjust the fluidity of slag.
Rutile: the main component is acidic oxide TiO 2 Adjusting the basicity of the slagAnd improve slag detachability and arc stability.
Potassium-sodalite: the aluminosilicate with potassium and sodium as main components has the functions of arc stabilization and slag formation, and can improve the press-coating property.
Potassium titanate: mainly made of TiO 2 And K 2 O, acting similarly to potash albite, further improves arc stability.
Rare earth fluoride: main component is CeO 2 、La 2 O 3 F, etc. has the functions of deoxidation, desulfurization and dehydrogenation and can be used for cleaning welding seam.
Soda ash, sodium carboxymethyl cellulose: can enhance the binding property between the powder and improve the press coating property of the welding rod.
Silicon iron: the trade name is SiFe75Al1.0-B, one of deoxidant. And the Si element is transited to the welding seam, so that the strength and the heat resistance of the welding seam are improved.
Manganese nitride: the grade is JMnN4, N and Mn are austenite forming elements, a proper amount of N can improve the heat resistance of weld metal, and Mn is beneficial to improving the strength and toughness of the weld metal and has certain desulfurization capability.
Titanium iron: the grade is FeTi30-A, which is one of deoxidizers and reduces the content of O in a welding seam.
Ferromolybdenum: the brand is FeMo55-A, mo element is transited to the welding line, and Mo can obviously improve the high temperature resistance of the welding line.
In conclusion, the welding rod for welding the magnesium smelting reduction pot and the preparation method thereof adopt a Cr-Ni-Mo-Mn-Si alloy system, so that a welding seam has good high temperature resistance and corrosion resistance, and adopt various fluorides such as fluorite, cryolite, rare earth fluoride and the like for dehydrogenation, so that the solidification speed of a molten pool is reduced, gas is discharged out of the molten pool, the weld seam tissue can be purified by rare earth elements, and the pore sensitivity and crack sensitivity of deposited metal can be effectively reduced by combining the rare earth elements according to a certain proportion; adding a proper amount of rutile, potassium-sodium feldspar and potassium titanate for improving the slag removal property, and simultaneously, K, na element can make the welding arc more stable and reduce the splashing; the nitrogen element in the manganese nitride is used as a solid solution strengthening element, so that the metal strength and corrosion resistance of the weld joint can be further improved, and the harm of sulfur can be reduced by a certain amount of manganese element; proper amount of soda and sodium carboxymethyl cellulose are added, the ratio of the sodium silicate binder is adjusted, the strength of a flux coating of the welding flux is improved, the tail end of the welding flux is prevented from cracking during high-current welding, and the welding efficiency is improved. By the comprehensive action of the various powders, the welding rod has the advantages of good arc stability, small splashing, beautiful shape, easy slag removal, no tail end cracking during heavy current welding, high welding efficiency, high temperature resistance and corrosion resistance of a welding joint and the like, and the service life of the magnesium-smelting reduction tank is effectively prolonged.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and are intended to be open ended, i.e., to include any methods, devices, and materials similar or equivalent to those described in the examples.
It should be noted that the material components not specifically described in the present invention are selected from conventional materials in the field of welding wire technology and can be obtained commercially in general, and the unpublished conditions are the same in the following examples except for the numerical values explicitly given.
Hereinafter, a specific example will be described in which the marble has a particle size of 40 mesh. The particle size of the fluorite is 40 meshes. The particle size of the cryolite is 60 meshes. The particle size of the rutile is 40 meshes. The particle size of the ferrosilicon is 60 meshes. The granularity of the manganese nitride is 80 meshes. The particle size of the potash albite is 40 meshes. The particle size of the potassium titanate is 60 meshes. The granularity of the ferrotitanium is 60 meshes. The grain size of the ferromolybdenum is 60 meshes. The granularity of the rare earth fluoride is 80 meshes. The particle size of the calcined soda is 60 meshes. The granularity of the sodium carboxymethyl cellulose is 60 meshes. The particle size of the iron powder is 40 meshes.
The invention provides a welding rod for welding a magnesium-smelting reduction pot, which comprises a steel core and welding flux, wherein the welding flux is uniformly distributed on the outer side of the steel core, and comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 30 to 40 percent of marble, 10 to 15 percent of fluorite, 5 to 10 percent of cryolite, 0.5 to 2 percent of rutile, 2 to 5 percent of ferrosilicon, 5 to 10 percent of manganese nitride, 2 to 5 percent of potash-sodium feldspar, 1 to 3 percent of potassium titanate, 5 to 8 percent of ferrotitanium, 0.1 to 1 percent of ferromolybdenum, 0.1 to 1 percent of rare earth fluoride, 0.5 to 1 percent of soda ash, 0.1 to 1 percent of sodium carboxymethylcellulose and the balance of iron powder.
In an example of the welding rod for welding the magnesium-smelting reduction tank, the steel core is a stainless steel core, and the stainless steel core comprises the following components in percentage by mass based on the total mass of the stainless steel core: c: less than or equal to 0.15%, mn:1.0 to 2.5%, si: less than or equal to 0.65 percent, S: less than or equal to 0.03%, P: less than or equal to 0.03%, cr:28 to 32%, ni:8 to 10.5%, mo: less than or equal to 0.75%, cu: less than or equal to 0.75 percent, and the balance of Fe and some inevitable impurities.
In an example of the welding rod for welding the magnesium smelting reduction pot, the mass percentage of the flux is 20-30% of the total mass of the welding rod for welding the magnesium smelting reduction pot.
In an example of the welding rod for welding the magnesium smelting reduction pot of the present invention, the diameter of the welding rod for welding the magnesium smelting reduction pot is 2.5 to 5.0mm.
The invention also provides a preparation method of the welding rod for welding the magnesium-smelting reduction pot, which comprises the following preparation steps:
s1, screening and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, and uniformly stirring and mixing to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying to obtain the welding rod for welding the magnesium smelting reduction tank.
In one example of the method for manufacturing the welding rod for welding the magnesium-smelting reduction pot according to the present invention, in step S2, the addition amount of the water glass binder is 21-24% of the total mass of the welding flux powder.
In one example of the method for manufacturing the welding rod for welding the magnesium-smelting reduction pot according to the present invention, in step S2, the stirring and mixing time of the stirrer is 60 to 90min.
In an example of the method for preparing the welding rod for welding the magnesium-smelting reduction pot, in step S3, the drying temperature is 350-370 ℃ and the drying time is 2-4 h.
According to the invention, a Cr-Ni-Mo-Mn-Si alloy system is adopted, so that a welding seam has good high temperature resistance and corrosion resistance, various fluorides such as fluorite, cryolite, rare earth fluoride and the like are adopted for dehydrogenation, the solidification speed of a molten pool is reduced, gas is favorably discharged out of the molten pool, rare earth elements can purify a welding seam tissue, and the rare earth elements are combined according to a certain proportion, so that the pore sensitivity and the crack sensitivity of deposited metal can be effectively reduced. Appropriate amount of rutile, potassium-sodium feldspar and potassium titanate are added to improve slag detachability, and K, na element can make welding arc more stable and reduce splashing. The nitrogen element in the manganese nitride is used as a solid solution strengthening element, so that the metal strength and the corrosion resistance of the welding seam can be improved, and the harm of sulfur can be reduced by a certain amount of manganese element. Proper amount of soda and sodium carboxymethyl cellulose are added, the ratio of the sodium silicate binder is adjusted, the strength of the flux coating of the welding flux is improved, the tail end of the welding flux is prevented from cracking during high-current welding, and the welding efficiency is improved.
Example 1
The welding rod for welding the magnesium smelting reduction pot comprises a steel core and a welding flux, wherein the welding flux comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 35% of marble, 12% of fluorite, 7% of cryolite, 0.8% of rutile, 2.4% of ferrosilicon, 6.6% of manganese nitride, 4.6% of potash-sodalite, 2.6% of potassium titanate, 6% of ferrotitanium, 0.3% of ferromolybdenum, 0.5% of rare earth fluoride, 0.8% of soda ash, 0.5% of sodium carboxymethylcellulose and the balance of iron powder. The steel core is stainless steel core.
The preparation method of the welding rod for welding the magnesium smelting reduction tank comprises the following steps:
s1, sieving and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, wherein the adding amount of the water glass binder is 22% of the total mass of the welding flux medicinal powder, and then stirring and mixing for 60min to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying for 2 hours at 360 ℃ to obtain the welding rod for welding the magnesium smelting reduction tank.
Wherein the welding flux accounts for 20% of the total mass of the welding rod for welding the magnesium smelting reduction pot, and the diameter of the welding rod for welding the magnesium smelting reduction pot is 2.5mm.
Example 2
The welding rod for welding the magnesium smelting reduction pot comprises a steel core and a welding flux, wherein the welding flux comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 30% of marble, 15% of fluorite, 5.5% of cryolite, 1.8% of rutile, 4.5% of ferrosilicon, 9.5% of manganese nitride, 2.5% of potash-sodalite, 1.2% of potassium titanate, 7.3% of ferrotitanium, 0.6% of ferromolybdenum, 0.8% of rare earth fluoride, 0.5% of calcined soda, 0.2% of sodium carboxymethylcellulose and the balance of iron powder. The steel core is a stainless steel core.
The preparation method of the welding rod for welding the magnesium smelting reduction tank comprises the following steps:
s1, screening and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, wherein the adding amount of the water glass binder is 23% of the total mass of the welding flux medicinal powder, and then stirring and mixing for 60min to obtain mixed powder;
and S3, coating the mixed powder on a steel core by a press coater, and drying for 2 hours at 360 ℃ to obtain the welding rod for welding the magnesium smelting reduction tank.
Wherein the welding flux accounts for 25 percent of the total mass of the welding rod for welding the magnesium smelting reduction pot, and the diameter of the welding rod for welding the magnesium smelting reduction pot is 3.2mm.
Example 3
The welding rod for welding the magnesium smelting reduction pot comprises a steel core and a welding flux, wherein the welding flux comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 39% of marble, 13% of fluorite, 9.2% of cryolite, 1.2% of rutile, 3.5% of ferrosilicon, 7.8% of manganese nitride, 3.6% of potash-sodalite, 2% of potassium titanate, 5.2% of ferrotitanium, 0.8% of ferromolybdenum, 0.2% of rare earth fluoride, 0.6% of calcined soda, 0.8% of sodium carboxymethylcellulose and the balance of iron powder. The steel core is a stainless steel core.
The preparation method of the welding rod for welding the magnesium smelting reduction tank comprises the following steps:
s1, screening and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, wherein the adding amount of the water glass binder is 24% of the total mass of the welding flux medicinal powder, and then stirring and mixing for 60min to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying for 2 hours at 360 ℃ to obtain the welding rod for welding the magnesium smelting reduction tank.
Wherein the welding flux accounts for 20% of the total mass of the welding rod for welding the magnesium smelting reduction pot, and the diameter of the welding rod for welding the magnesium smelting reduction pot is 4.0mm.
Example 4
The welding rod for welding the magnesium smelting reduction pot comprises a steel core and a welding flux, wherein the welding flux comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 40% of marble, 12% of fluorite, 10% of cryolite, 2% of rutile, 5% of ferrosilicon, 5% of manganese nitride, 5% of potash-soda feldspar, 3% of potassium titanate, 5% of ferrotitanium, 4% of ferromolybdenum, 0.1% of rare earth fluoride, 1% of soda ash, 0.1% of sodium carboxymethylcellulose and the balance of iron powder. The steel core is a stainless steel core.
The preparation method of the welding rod for welding the magnesium smelting reduction tank comprises the following steps:
s1, screening and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, wherein the adding amount of the water glass binder is 21% of the total mass of the welding flux medicinal powder, and then stirring and mixing for 90min to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying for 4 hours at 350 ℃ to obtain the welding rod for welding the magnesium smelting reduction tank.
Wherein the welding flux accounts for 30% of the total mass of the welding rod for welding the magnesium smelting reduction pot, and the diameter of the welding rod for welding the magnesium smelting reduction pot is 5.0mm.
Example 5
The welding rod for welding the magnesium smelting reduction pot comprises a steel core and a welding flux, wherein the welding flux comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 30% of marble, 10% of fluorite, 10% of cryolite, 0.5% of rutile, 4% of ferrosilicon, 10% of manganese nitride, 2% of potash-sodium feldspar, 1% of potassium titanate, 8% of ferrotitanium, 0.5% of ferromolybdenum, 1% of rare earth fluoride, 0.5% of soda ash, 0.2% of sodium carboxymethylcellulose and the balance of iron powder. The steel core is stainless steel core.
The preparation method of the welding rod for welding the magnesium smelting reduction tank comprises the following steps:
s1, screening and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, wherein the adding amount of the water glass binder is 22% of the total mass of the welding flux medicinal powder, and then stirring and mixing for 80min to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying for 2 hours at 370 ℃ to obtain the welding rod for welding the magnesium smelting reduction tank.
Wherein the welding flux accounts for 30% of the total mass of the welding rod for welding the magnesium smelting reduction pot, and the diameter of the welding rod for welding the magnesium smelting reduction pot is 5.0mm.
Example 6
The welding rod for welding the magnesium-smelting reduction pot comprises a steel core and a welding flux, wherein the welding flux comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 35% of marble, 12% of fluorite, 7% of cryolite, 0.8% of rutile, 3% of ferrosilicon, 6% of manganese nitride, 4% of potash-sodium feldspar, 2.5% of potassium titanate, 6% of ferrotitanium, 0.1% of ferromolybdenum, 0.5% of rare earth fluoride, 0.8% of soda ash, 1% of sodium carboxymethylcellulose and the balance of iron powder. The steel core is a stainless steel core.
The preparation method of the welding rod for welding the magnesium smelting reduction tank comprises the following steps:
s1, sieving and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, wherein the adding amount of the water glass binder is 23% of the total mass of the welding flux medicinal powder, and then stirring and mixing for 60min to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying for 2 hours at 360 ℃ to obtain the welding rod for welding the magnesium smelting reduction tank.
Wherein the welding flux accounts for 25 percent of the total mass of the welding rod for welding the magnesium smelting reduction pot, and the diameter of the welding rod for welding the magnesium smelting reduction pot is 4.0mm.
The welding test of the magnesium reduction pot was carried out using the welding rods for welding the magnesium reduction pot prepared in examples 1 to 6, and the parameters of the electric welder were: the voltage is 34-36V, the current is 200-220A, the welding process performance of the welding rod, the mechanical property of the deposited metal and the service life of the magnesium smelting reduction tank are tested, the welding process performance test result of the welding rod is shown in Table 1, and the mechanical property of the deposited metal and the service life of the magnesium smelting reduction tank are shown in Table 2.
Table 1 shows the results of testing the welding process performance of the welding rod
| Test items | Arc stability | Detachability of slag | Splash away | Crack at tail end | Molding conditions |
| Example 1 | Superior food | Superior food | Small | Is free of | Good effect |
| Example 2 | Youyou (an instant noodle) | Superior food | Small | Is free of | Good effect |
| Example 3 | Superior food | Superior food | Small | Is free of | Good effect |
| Example 4 | Superior food | Superior food | Small | Is free of | Good effect |
| Example 5 | Superior food | Superior food | Small | Is free of | Good effect |
| Example 6 | Superior food | Superior food | Small | Is free of | Good effect |
| Common welding rod | In general | In general | Big (a) | Cracking of | Slight undercut |
As can be seen from the test results in Table 1, the welding rod for welding the magnesium-smelting reduction pot has the advantages of good arc stability, small splashing, beautiful shape, easy slag removal, no tail end cracking during large-current welding, high welding efficiency and good welding effect.
Table 2 shows the results of the mechanical properties of the deposited metal and the service life of the magnesium reduction pot
As can be seen from the test results in Table 2, the deposited metal formed by the welding rod for welding the magnesium-smelting reduction pot has higher tensile strength, high temperature resistance and corrosion resistance, better pore resistance and crack resistance, higher elongation, and longer service life than the common welding rod, which shows that the deposited metal formed by the welding rod for welding the magnesium-smelting reduction pot has the advantages of high temperature resistance, corrosion resistance and the like.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The welding rod for welding the magnesium smelting reduction pot is characterized by comprising a steel core and welding flux, wherein the welding flux is uniformly distributed on the outer side of the steel core, and the welding flux comprises the following raw materials in percentage by mass based on the total mass of the welding flux: 30 to 40 percent of marble, 10 to 15 percent of fluorite, 5 to 10 percent of cryolite, 0.5 to 2 percent of rutile, 2 to 5 percent of ferrosilicon, 5 to 10 percent of manganese nitride, 2 to 5 percent of potash-sodium feldspar, 1 to 3 percent of potassium titanate, 5 to 8 percent of ferrotitanium, 0.1 to 1 percent of ferromolybdenum, 0.1 to 1 percent of rare earth fluoride, 0.5 to 1 percent of soda ash, 0.1 to 1 percent of sodium carboxymethylcellulose and the balance of iron powder.
2. The welding electrode for welding a magnesium reduction pot as defined in claim 1, wherein said steel core is a stainless steel core, said stainless steel core comprising the following components in mass percent based on the total mass of said stainless steel core: c: less than or equal to 0.15 percent, mn:1.0 to 2.5%, si: less than or equal to 0.65 percent, S: less than or equal to 0.03%, P: less than or equal to 0.03 percent, cr:28 to 32%, ni:8 to 10.5%, mo: less than or equal to 0.75 percent, cu: less than or equal to 0.75 percent, and the balance of Fe and some inevitable impurities.
3. The welding electrode for welding a magnesium-smelting reduction pot as defined in claim 1, wherein said marble is added in an amount of 35-40%.
4. The welding electrode for welding a magnesium reduction pot as defined in claim 1, wherein said fluorite is added in an amount of 12 to 15%.
5. The welding electrode for welding a magnesium-smelting reduction pot as defined in claim 1, wherein said flux is in a mass percentage of 20 to 30% based on the total mass of said welding electrode for welding a magnesium-smelting reduction pot.
6. The welding electrode for welding a magnesium-smelting reduction pot as defined in claim 1, wherein said welding electrode for welding a magnesium-smelting reduction pot has a diameter of 2.5 to 5.0mm.
7. A method of manufacturing an electrode for welding a magnesium reduction pot according to any one of claims 1 to 6, characterized in that the manufacturing step comprises:
s1, screening and weighing the components of the welding flux respectively for later use;
s2, adding the medicinal powder of each component obtained in the step S1 into a stirrer, adding a water glass binder into the stirrer, and uniformly stirring and mixing to obtain mixed powder;
and S3, press-coating the mixed powder on a steel core through a press coater, and drying to obtain the welding rod for welding the magnesium smelting reduction tank.
8. The method for preparing a welding rod for welding a magnesium-smelting reduction pot according to claim 7, wherein in step S2, the amount of the water glass binder added is 21 to 24% of the total mass of the flux powder.
9. The method for preparing an electrode for welding a magnesium-smelting reduction pot according to claim 7, wherein in the step S2, the stirring and mixing time of the stirrer is 60 to 90min.
10. The method for preparing a welding rod for welding a magnesium-smelting reduction pot as defined in claim 7, wherein in step S3, the drying temperature for drying is 350-370 ℃ and the drying time is 2-4 h.
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