CN117923885B - Vanadium-titanium-aluminum alloy stemming for blast furnace iron plugging port - Google Patents
Vanadium-titanium-aluminum alloy stemming for blast furnace iron plugging port Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 110
- -1 Vanadium-titanium-aluminum Chemical compound 0.000 title claims abstract description 77
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 60
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 55
- 229910052751 metal Inorganic materials 0.000 claims abstract description 157
- 239000002184 metal Substances 0.000 claims abstract description 157
- 239000000843 powder Substances 0.000 claims abstract description 116
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 82
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000010431 corundum Substances 0.000 claims abstract description 70
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 70
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 66
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 66
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 37
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000004014 plasticizer Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000007767 bonding agent Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 132
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 52
- 239000010453 quartz Substances 0.000 claims description 48
- 239000010426 asphalt Substances 0.000 claims description 46
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims description 44
- 239000010443 kyanite Substances 0.000 claims description 44
- 229910052850 kyanite Inorganic materials 0.000 claims description 44
- 239000004927 clay Substances 0.000 claims description 22
- 229920000609 methyl cellulose Polymers 0.000 claims description 22
- 239000001923 methylcellulose Substances 0.000 claims description 22
- 235000010981 methylcellulose Nutrition 0.000 claims description 22
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical group [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 18
- 239000005011 phenolic resin Substances 0.000 claims description 18
- 229920001568 phenolic resin Polymers 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 abstract description 16
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 abstract description 13
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 abstract description 11
- 238000009991 scouring Methods 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 9
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 239000010936 titanium Substances 0.000 abstract description 5
- 229910052719 titanium Inorganic materials 0.000 abstract description 5
- 239000003963 antioxidant agent Substances 0.000 abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 abstract description 4
- 229910000765 intermetallic Inorganic materials 0.000 abstract description 2
- JTCFNJXQEFODHE-UHFFFAOYSA-N [Ca].[Ti] Chemical compound [Ca].[Ti] JTCFNJXQEFODHE-UHFFFAOYSA-N 0.000 description 31
- 230000000052 comparative effect Effects 0.000 description 23
- 239000000463 material Substances 0.000 description 16
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 13
- 150000004767 nitrides Chemical class 0.000 description 13
- 230000035699 permeability Effects 0.000 description 8
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- DNWNZRZGKVWORZ-UHFFFAOYSA-N calcium oxido(dioxo)vanadium Chemical compound [Ca+2].[O-][V](=O)=O.[O-][V](=O)=O DNWNZRZGKVWORZ-UHFFFAOYSA-N 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 4
- 230000008018 melting Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010310 metallurgical process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000002006 petroleum coke Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OHVLMTFVQDZYHP-UHFFFAOYSA-N 1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-2-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound N1N=NC=2CN(CCC=21)C(CN1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)=O OHVLMTFVQDZYHP-UHFFFAOYSA-N 0.000 description 1
- JQMFQLVAJGZSQS-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-N-(2-oxo-3H-1,3-benzoxazol-6-yl)acetamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)NC1=CC2=C(NC(O2)=O)C=C1 JQMFQLVAJGZSQS-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 229910001337 iron nitride Inorganic materials 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical group [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The invention provides vanadium-titanium-aluminum alloy stemming for a blast furnace iron plugging port, which comprises the following components in percentage by mass: 20-30% of calcium titanate aluminate, 20-32% of chrome corundum, 6-18% of brown corundum, 9-17% of green silicon carbide, 2-8% of sintering promoter, 6-14% of carbon material, 3-9% of expanding agent, 1-7% of plasticizer, 0.3-1.5% of metallic titanium powder, 0.3-1.5% of metallic vanadium powder and 0.3-1.5% of metallic aluminum powder; and 6% -12% of externally added liquid bonding agent. According to the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch, the metal aluminum powder, the metal titanium powder and the metal vanadium powder are added to serve as antioxidants, meanwhile, the metal vanadium and the metal titanium can form high-hardness intermetallic compounds such as vanadium carbide and titanium carbide with carbon, and the metal aluminum powder, the metal titanium powder and the metal vanadium powder can form vanadium-titanium-aluminum alloy at high temperature, so that the strength of the stemming is greatly improved, and the oxidation resistance and the anti-scouring performance of the stemming are enhanced.
Description
Technical Field
The invention belongs to the technical field of stemming for a blast furnace iron notch, and particularly relates to vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch.
Background
Stemming materials are indispensable materials in the blast furnace smelting process, water stemming is usually used for a tap hole in front of a blast furnace at first, and along with the continuous development of a smelting process and iron-making auxiliary materials, the water stemming is gradually replaced by anhydrous stemming. The stemming material is mainly used for blocking the tap hole after the blast furnace is completely tapped, stemming is driven into the tap hole by means of high pressure of a stemming machine to a certain depth, so that the tap hole is sealed, and when enough molten iron is smelted in the blast furnace, the stemming sealing the tap hole is drilled through by using a tapping machine, so that secondary tapping and reciprocating circulation are realized. Therefore, a certain amount of stemming material is consumed for each tapping of the blast furnace, and for continuously operating iron and steel enterprises, the stemming consumption is large, and along with the continuous development of a smelting process, the requirements on the performance of the stemming are higher and higher, firstly, the stemming has better plasticity to meet the construction requirements, and secondly, the stemming has enough erosion resistance to resist the scouring and erosion of slag iron.
The length of the blast furnace tap hole can reach 3.3 meters, during the working process, the temperature of the inner side of the furnace is about 1500-2300 ℃, the stemming on the inner side is sintered at high temperature, the strength is improved, the temperature of the outer side of the furnace is about 100 ℃, the stemming on the outer side of the hole is not sintered, and the strength is obviously insufficient. In order to solve the problem, a method of adding a large amount of coke powder into stemming is mainly adopted at present, the coke powder can improve the air permeability of the stemming, so that hot air flow on the inner side of a blast furnace can be transferred to the outer side through air holes of the stemming, and the stemming is integrally sintered. However, the addition of the coke powder increases the porosity, and the corrosion resistance and the scouring resistance of the stemming are obviously reduced, and the carbon in the coke powder is easy to oxidize, so that the high-temperature strength of the stemming is greatly reduced after the oxidation. Vanadium titanium stemming is currently considered to be the best performing stemming. The Chinese patent document with publication number CN111848144A discloses a titanium-containing tap hole repairing stemming and a preparation method thereof, wherein vanadium-titanium powder is added into a preparation raw material to prepare the vanadium-titanium stemming. However, the high-temperature strength performance, erosion resistance and scour resistance of the existing vanadium-titanium stemming are still insufficient.
Disclosure of Invention
The technical problem solved by the invention is to provide the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch, metal aluminum powder, metal titanium powder and metal vanadium powder are added to serve as antioxidants, meanwhile, metal vanadium and metal titanium can also form high-hardness intermetallic compounds such as vanadium carbide and titanium carbide with carbon, and the metal aluminum powder, the metal titanium powder and the metal vanadium powder can form vanadium-titanium-aluminum alloy at high temperature, so that the strength of the stemming is greatly improved, and the oxidation resistance and the scouring resistance of the stemming are both enhanced.
In order to solve the problems, the invention provides vanadium-titanium-aluminum alloy stemming for a blast furnace iron plugging port, which comprises the following components in percentage by mass:
20-30% of calcium titanate aluminate, 20-32% of chrome corundum, 6-18% of brown corundum, 9-17% of green silicon carbide, 2-8% of sintering promoter, 6-14% of carbon material, 3-9% of expanding agent, 1-7% of plasticizer, 0.3-1.5% of metallic titanium powder, 0.3-1.5% of metallic vanadium powder and 0.3-1.5% of metallic aluminum powder; and 6% -12% of externally added liquid bonding agent.
Preferably, the composition comprises the following components in percentage by mass:
22-28% of calcium titanate aluminate, 23-29% of chrome corundum, 9-14% of brown corundum, 12-15% of green silicon carbide, 3-6% of sintering promoter, 8-12% of carbon material, 5-7% of expanding agent, 2-5% of plasticizer, 0.5-1% of metallic titanium powder, 0.5-1% of metallic vanadium powder and 0.5-1% of metallic aluminum powder; 7% -10% of externally added liquid bonding agent.
Preferably, the composition comprises the following components in percentage by mass:
25% of calcium titanate aluminate, 25% of chrome corundum, 10% -12% of brown corundum, 14% of green silicon carbide, 5% of sintering promoter, 10% of carbon material, 6% of expanding agent, 3% of plasticizer, 0.5% -1% of metallic titanium powder, 0.5% -1% of metallic vanadium powder and 0.5% -1% of metallic aluminum powder; 8% -10% of externally added liquid bonding agent.
Preferably, the carbon material is a mixture of coke powder and high-temperature asphalt powder, and the mass ratio of the coke powder to the high-temperature asphalt powder is 6-8:3.
Preferably, the expanding agent is a mixture of kyanite and quartz powder, and the mass ratio of the kyanite to the quartz powder is 3-5:2.
Preferably, the plasticizer is a mixture of white clay and methyl cellulose, and the mass ratio of the white clay to the methyl cellulose is 15-40:1.
Preferably, the ratio of the total mass of the metal vanadium powder and the metal titanium powder to the mass of the carbon material is 1-1.5: 10.
Preferably, the mass ratio of the metal aluminum powder to the metal titanium powder to the metal vanadium powder is 0.5-1:0.5-1.
Preferably, the calcium titanate aluminate comprises particles with a particle size of > 1mm and 3mm or less and particles with a particle size of > 0mm and 1mm or less; the mass ratio of the particles with the particle size more than 1mm and less than or equal to 3mm to the particles with the particle size more than 0mm and less than or equal to 1mm is 1:1-2;
The chrome corundum comprises particles with the particle size of more than 1mm and less than or equal to 3mm and particles with the particle size of more than 0mm and less than or equal to 1 mm; the mass ratio of the particles with the particle size of more than 1mm and less than or equal to 3mm to the particles with the particle size of more than 0mm and less than or equal to 1mm is 1.5-4:1.
Preferably, the liquid binder is a phenolic resin.
Compared with the prior art, the invention has the following beneficial effects:
the vanadium-titanium-aluminum alloy stemming for the blast furnace iron plugging port, disclosed by the invention, has the advantages that the titanium-calcium aluminate is a byproduct generated in the metallurgical process of ferrotitanium alloy, the refractoriness can reach more than 1790 ℃, the high-temperature industrial vanadium-titanium-aluminum alloy stemming has good utilization value, but the titanium-calcium aluminate is not reasonably utilized as a solid waste material for many years, occupies a large amount of land resources, can cause a certain damage to the environment, is fully utilized, can reduce the production cost of the stemming, and improves the utilization rate of industrial byproducts. The green silicon carbide is prepared by taking petroleum coke and high-quality silica as main raw materials and adding salt as an additive and smelting at high temperature by a resistance furnace, and the smelted crystal has high purity, high hardness, hardness between corundum and diamond, mechanical strength higher than that of corundum, and high purity, less impurity content and high hardness compared with 97 silicon carbide. The sintering promoter can promote the sintering of stemming at two ends of a tap hole and improve the strength of the stemming. The carbon material can improve the air permeability of stemming on the one hand, and the hot air flow of blast furnace inboard can pass to the outside through the gas pocket of stemming in the course of the work, promotes the sintering of blast furnace outside stemming, can promote the sintering after on the other hand high temperature, improves stemming intensity. The expanding agent resists volume shrinkage of the stemming at high temperatures. The plasticizer can improve the plasticity of the material and meet the construction requirements.
According to the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch, metal titanium powder, metal vanadium powder and metal aluminum powder are also added, vanadium, titanium and oxides thereof belong to high-melting-point substances, calcium titanate, aluminum titanate, calcium titanate aluminate, calcium vanadate, aluminum vanadate and the like are generated with calcium oxide and aluminum oxide in slag at high temperature and also belong to high-melting-point phases, so that a large number of solid high-melting-point phases are gathered near the iron notch or in a balling position, and the erosion resistance and the anti-scouring performance of the stemming are obviously improved; the metal titanium powder, the metal vanadium powder and the metal aluminum powder can also be used as antioxidants, the metal titanium powder and the metal vanadium powder can respectively react with carbon materials at high temperature to generate titanium carbide and vanadium carbide, generally, after the titanium powder and the vanadium carbide form new substances with carbon, the newly generated phases can be wrapped on the surface of the carbon, so that the further reaction of oxygen and the carbon is prevented, the oxidation resistance of the carbon is improved, and the metal aluminum powder can react with the oxygen before the carbon, so that the oxidation of the carbon is reduced. In addition, the generated titanium carbide and vanadium carbide are all materials with very high hardness, and the overall high-temperature strength performance of the stemming can be improved. In addition, the metal titanium powder, the metal vanadium powder and the metal aluminum powder can also generate vanadium-titanium-aluminum alloy at high temperature, and the vanadium-titanium-aluminum alloy is also a high-hardness material, so that the overall high-temperature strength of the stemming is improved, and the anti-scouring performance is improved.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides vanadium-titanium-aluminum alloy stemming for a blast furnace iron notch, which comprises the following components in percentage by mass:
20-30% of calcium titanate aluminate, 20-32% of chrome corundum, 6-18% of brown corundum, 9-17% of green silicon carbide, 2-8% of sintering promoter, 6-14% of carbon material, 3-9% of expanding agent, 1-7% of plasticizer, 0.3-1.5% of metallic titanium powder, 0.3-1.5% of metallic vanadium powder and 0.3-1.5% of metallic aluminum powder; and 6% -12% of externally added liquid bonding agent.
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron plugging port, disclosed by the embodiment of the invention, has the advantages that the titanium-calcium aluminate is a byproduct generated in the metallurgical process of ferrotitanium alloy, the refractoriness can reach more than 1790 ℃, the high-temperature industrial vanadium-titanium-aluminum alloy stemming has good utilization value, but is not reasonably utilized as a solid waste material for many years, occupies a large amount of land resources, can cause a certain damage to the environment, can fully utilize the stemming, can reduce the production cost of the stemming, and can improve the utilization rate of industrial byproducts. The green silicon carbide is prepared by taking petroleum coke and high-quality silica as main raw materials and adding salt as an additive and smelting at high temperature by a resistance furnace, and the smelted crystal has high purity, high hardness, hardness between corundum and diamond, mechanical strength higher than that of corundum, and high purity, less impurity content and high hardness compared with 97 silicon carbide. The sintering promoter can promote the sintering of stemming at two ends of a tap hole and improve the strength of the stemming. The carbon material can improve the air permeability of stemming on the one hand, and the hot air flow of blast furnace inboard can pass to the outside through the gas pocket of stemming in the course of the work, promotes the sintering of blast furnace outside stemming, can promote the sintering after on the other hand high temperature, improves stemming intensity. The expanding agent resists volume shrinkage of the stemming at high temperatures. The plasticizer can improve the plasticity of the material and meet the construction requirements.
According to the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch, the metal titanium powder, the metal vanadium powder and the metal aluminum powder are also added, vanadium, titanium and oxides thereof belong to high-melting-point substances, calcium titanate, aluminum titanate, calcium titanate aluminate, calcium vanadate, aluminum vanadate and the like are generated with calcium oxide and aluminum oxide in slag at high temperature and also belong to high-melting-point phases, so that a large amount of solid high-melting-point phases are gathered near the iron notch or in a mud-ladle position, and the erosion resistance and the anti-scouring performance of the stemming are remarkably improved; the metal titanium powder, the metal vanadium powder and the metal aluminum powder can also be used as antioxidants, the metal titanium powder and the metal vanadium powder can respectively react with carbon materials at high temperature to generate titanium carbide and vanadium carbide, generally, after the titanium powder and the vanadium carbide form new substances with carbon, the newly generated phases can be wrapped on the surface of the carbon, so that the further reaction of oxygen and the carbon is prevented, the oxidation resistance of the carbon is improved, and the metal aluminum powder can react with the oxygen before the carbon, so that the oxidation of the carbon is reduced. In addition, the generated titanium carbide and vanadium carbide are all materials with very high hardness, and the overall high-temperature strength performance of the stemming can be improved. In addition, the metal titanium powder, the metal vanadium powder and the metal aluminum powder can also generate vanadium-titanium-aluminum alloy at high temperature, and the vanadium-titanium-aluminum alloy is also a high-hardness material, so that the overall high-temperature strength of the stemming is improved, and the anti-scouring performance is improved.
In some embodiments, the vanadium titanium aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
22-28% of calcium titanate aluminate, 23-29% of chrome corundum, 9-14% of brown corundum, 12-15% of green silicon carbide, 3-6% of sintering promoter, 8-12% of carbon material, 5-7% of expanding agent, 2-5% of plasticizer, 0.5-1% of metallic titanium powder, 0.5-1% of metallic vanadium powder and 0.5-1% of metallic aluminum powder; 7% -10% of externally added liquid bonding agent. When the mass percentage is adopted, the anti-scouring, anti-erosion and high-temperature strength performances of the vanadium-titanium stemming are higher.
In some embodiments, the composition comprises the following components in percentage by mass:
25% of calcium titanate aluminate, 25% of chrome corundum, 10% -12% of brown corundum, 14% of green silicon carbide, 5% of sintering promoter, 10% of carbon material, 6% of expanding agent, 3% of plasticizer, 0.5% -1% of metallic titanium powder, 0.5% -1% of metallic vanadium powder and 0.5% -1% of metallic aluminum powder; 8% -10% of externally added liquid bonding agent. When the mass percentage is adopted, the anti-scouring, anti-erosion and high-temperature strength performances of the vanadium-titanium stemming are higher.
In some embodiments, the carbon material may be a coke powder, a high temperature pitch powder, or the like. Preferably, the carbon material is a mixture of coke powder and high temperature pitch powder. The air permeability of stemming can be improved by the coke powder and the high-temperature asphalt powder, the heat transfer in a furnace is facilitated to be accelerated, in contrast, the porosity of the coke powder is higher, the air permeability is stronger, the high-temperature asphalt powder has high-temperature cohesiveness, the sintering of the stemming can be promoted at high temperature, the strength of the stemming is improved, and the coke powder and the high-temperature asphalt powder are mixed to be used as carbon materials, so that the stemming has better air permeability and sintering promotion property. Because the ventilation of the coke powder is stronger, the high-temperature asphalt powder can promote the sintering of stemming, and compared with the coke powder, the impurity content of the high-temperature asphalt powder is higher. Therefore, preferably, the mass ratio of the coke powder to the high-temperature asphalt powder is 6-8:3. By adopting the proportion, better stemming high-temperature performance can be obtained.
In some embodiments, the expanding agent may be kyanite, quartz powder, or the like. Preferably, the expanding agent is a mixture of kyanite and quartz powder. The kyanite is decomposed at 1400 ℃ mainly under the condition of high-temperature calcination, and the original crystal phase is converted into mullite phase, so that free SiO 2 is separated out, thereby generating remarkable volume expansion, and the expansion rate can reach 16% -18%. The expansion temperature of quartz powder is about 1200 ℃, and in this temperature range, the quartz powder can undergo a series of chemical reactions and gradually expand to generate a certain volume expansion. The kyanite and the quartz powder can expand at different temperatures and have different expansion rates, and the volume shrinkage of the stemming in different temperature ranges can be relieved after the kyanite and the quartz powder are matched. Because the expansion rates of the kyanite and the quartz powder are different, the different proportions of the kyanite and the quartz powder can lead the stemming to generate different volume expansion, and the quartz powder is excessively added to generate a low melting phase, so that the high-temperature performance of the stemming is reduced. Therefore, preferably, the mass ratio of kyanite to quartz powder is 3-5:2. In this ratio range, the volume shrinkage of the stemming at high temperatures can be accommodated by the expansion of the above-mentioned expanding agent without producing too much low melting phase, degrading the high temperature performance.
In some embodiments, the plasticizer may be white clay, methylcellulose, or the like. Preferably, the plasticizer is a mixture of white clay and methylcellulose. The two are different in plasticizing effect, and preferably, the mass ratio of the white clay to the methyl cellulose is 15-40:1. In the proportion range, the stemming has better construction performance.
In some embodiments, before the stemming is not sintered, the carbon material can improve the porosity of the stemming, so that the hot air flow in the hearth is convenient to transfer, the sintering of the stemming outside is promoted, and as the temperature in the hearth is increased, the carbon material, the metal titanium powder and the metal vanadium powder generate high-hardness materials titanium carbide and vanadium carbide, so that the high-temperature strength of the stemming is improved. Preferably, the ratio of the total mass of the metal vanadium powder and the metal titanium powder to the mass of the carbon material is 1-1.5: 10. in the proportion range, the reaction quantity of the metal vanadium powder, the metal titanium powder and the carbon material is proper, and the stemming has better high-temperature performance.
In some embodiments, the metal aluminum powder, the metal titanium powder and the metal vanadium powder can generate vanadium-titanium-aluminum alloy at high temperature, and the vanadium-titanium-aluminum alloy has high hardness and can improve the high-temperature strength performance of stemming. The metal aluminum powder, the metal titanium powder and the metal vanadium powder need to have proper mass ratio to generate alloy with better performance, and the reaction of the metal titanium powder, the metal vanadium powder and the carbon material can cause the partial consumption of the metal aluminum powder, the metal titanium powder and the metal vanadium powder. Considering the problems comprehensively, preferably, the mass ratio of the metal aluminum powder to the metal titanium powder to the metal vanadium powder is 0.5-1:0.5-1. In the mass range, the high-temperature strength performance of the stemming is better.
In some embodiments, the calcium titanates include particles having a particle size > 1mm and 3mm or less and particles having a particle size > 0mm and 1mm or less; the mass ratio of the particles with the particle size of more than 1mm and less than or equal to 3mm to the particles with the particle size of more than 0mm and less than or equal to 1mm is 1:1-2. Under the grain size grading, the stemming has better high-temperature strength performance and construction performance.
In some embodiments, the chrome corundum includes particles having a particle size > 1mm and 3mm or less and particles having a particle size > 0mm and 1mm or less; the mass ratio of the particles with the particle size of more than 1mm and less than or equal to 3mm to the particles with the particle size of more than 0mm and less than or equal to 1mm is 1.5-4:1. Under the grain size grading, the stemming has better high-temperature strength performance and construction performance.
In some embodiments, the sintering promoting agent is silicon iron nitride.
In some embodiments, the liquid binder is a phenolic resin.
Example 1
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the particle size of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the particle size of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the particle size of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the particle size of more than 0mm and less than or equal to 1mm, 10.5% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metallic titanium powder, 0.5% of metallic vanadium powder, 0.5% of metallic aluminum powder and 9% of added phenolic resin.
Example 2
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the particle size of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the particle size of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the particle size of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the particle size of more than 0mm and less than or equal to 1mm, 10% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metallic titanium powder, 0.5% of metallic vanadium powder, 1% of metallic aluminum powder and 9% of added phenolic resin.
Example 3
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 10% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 1% of metallic titanium powder, 0.5% of metallic vanadium powder, 0.5% of metallic aluminum powder and 9% of added phenolic resin.
Example 4
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the particle size of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the particle size of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the particle size of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the particle size of more than 0mm and less than or equal to 1mm, 10% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metallic titanium powder, 1% of metallic vanadium powder, 0.5% of metallic aluminum powder and 9% of added phenolic resin.
Example 5
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 12% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 9% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 9% of brown corundum, 15% of green silicon carbide, 6% of ferrosilicon nitride, 5.5% of coke powder, 2.5% of high-temperature asphalt powder, 5% of kyanite, 2% of quartz powder, 1.9% of white clay, 0.1% of methyl cellulose, 0.5% of metallic titanium powder, 0.5% of metallic vanadium powder, 1% of metallic aluminum powder and 9% of added phenolic resin.
Example 6
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of calcium titanate aluminate particles with the particle size of more than 1mm and less than or equal to 3mm, 16.5% of calcium titanate particles with the particle size of more than 0mm and less than or equal to 1mm, 15% of chrome corundum particles with the particle size of more than 1mm and less than or equal to 3mm, 8% of chrome corundum particles with the particle size of more than 0mm and less than or equal to 1mm, 12.5% of brown corundum, 12% of green silicon carbide, 3% of ferrosilicon nitride, 8% of coke powder, 4% of high-temperature asphalt powder, 3% of kyanite, 2% of quartz powder, 3.8% of white clay, 0.2% of methyl cellulose, 0.7% of metallic titanium powder, 0.8% of metallic vanadium powder, 0.5% of metallic aluminum powder and 9% of added phenolic resin.
Example 7
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 10% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 12% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 6% of brown corundum, 17% of green silicon carbide, 8% of silicon nitride iron, 4% of coke powder, 2% of high-temperature asphalt powder, 6% of kyanite, 3% of quartz powder, 0.9% of white clay, 0.1% of methyl cellulose, 0.3% of metallic titanium powder, 0.3% of metallic vanadium powder, 0.4% of metallic aluminum powder and 9% of additional phenolic resin.
Example 8
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 18% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 15% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 15% of brown corundum, 9% of green silicon carbide, 2% of ferrosilicon nitride, 10% of coke powder, 4% of high-temperature asphalt powder, 2% of kyanite, 1% of quartz powder, 6.2% of white clay, 0.3% of methyl cellulose, 1% of metallic titanium powder, 1% of metallic vanadium powder, 0.5% of metallic aluminum powder and 9% of added phenolic resin.
Example 9
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is characterized in that the coke powder is 6.7%, the high-temperature asphalt powder is 3.3%, and the rest components are the same as the embodiment 1. The total mass fraction of the coke powder and the high-temperature asphalt powder is unchanged, and the mass ratio of the coke powder to the high-temperature asphalt powder is 2:1.
Example 10
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch of the embodiment is compared with the embodiment 1, and is distinguished in that the coke powder is 7.2%, the high-temperature asphalt powder is 2.8%, and the rest components are the same as the embodiment 1. The total mass fraction of the coke powder and the high-temperature asphalt powder is unchanged, and the mass ratio of the coke powder to the high-temperature asphalt powder is 2.6:1.
Example 11
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch of the embodiment is different from the embodiment 1 in that the coke powder is 6%, the high-temperature asphalt powder is 4%, and the rest components are the same as the embodiment 1. The total mass fraction of the coke powder and the high-temperature asphalt powder is unchanged, and the mass ratio of the coke powder to the high-temperature asphalt powder is 1.5:1.
Example 12
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch of the embodiment is compared with the embodiment 1, wherein the difference is that the coke powder is 8%, the high-temperature asphalt powder is 2%, and the rest components are the same as the embodiment 1. The total mass fraction of the coke powder and the high-temperature asphalt powder is unchanged, and the mass ratio of the coke powder to the high-temperature asphalt powder is 4:1.
Example 13
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is 3.6% in blue spar and 2.4% in quartz powder. The total mass fraction of kyanite and quartz powder is unchanged, and the mass ratio of the kyanite to the quartz powder is 1.5:1.
Example 14
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is 4.2% in kyanite and 1.8% in quartz powder. The total mass fraction of kyanite and quartz powder is unchanged, and the mass ratio of the kyanite to the quartz powder is 2.3:1.
Example 15
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is 3% in kyanite and 3% in quartz powder. The total mass fraction of kyanite and quartz powder is unchanged, and the mass ratio of the kyanite to the quartz powder is 1:1.
Example 16
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is 4.5% in kyanite and 1.5% in quartz powder. The total mass fraction of kyanite and quartz powder is unchanged, and the mass ratio of the kyanite to the quartz powder is 3:1.
Example 17
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is characterized in that the coke powder is 6.4%, the high-temperature asphalt powder is 2.7%, the metal titanium powder is 0.8%, the metal vanadium powder is 0.8% and the metal aluminum powder is 0.8%. Namely, the total mass fraction of the carbon material, the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, the mass ratio of the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, and the mass ratio of the total mass of the metal titanium powder and the metal vanadium powder to the carbon material is 1.48:10.
Example 18
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is characterized in that the coke powder is 6.6%, the high-temperature asphalt powder is 2.8%, the metal titanium powder is 0.7%, the metal vanadium powder is 0.7% and the metal aluminum powder is 0.7%. Namely, the total mass fraction of the carbon material, the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, the mass ratio of the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, and the mass ratio of the total mass of the metal titanium powder and the metal vanadium powder to the carbon material is 1.76:10.
Example 19
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is characterized in that the coke powder is 7.2%, the high-temperature asphalt powder is 3.1%, the metal titanium powder is 0.4%, the metal vanadium powder is 0.4% and the metal aluminum powder is 0.4%. Namely, the total mass fraction of the carbon material, the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, the mass ratio of the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, and the mass ratio of the total mass of the metal titanium powder and the metal vanadium powder to the carbon material is 0.78:10.
Example 20
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is characterized in that the metal titanium powder is 0.3%, the metal vanadium powder is 0.7% and the metal aluminum powder is 0.5%. Namely, the total mass fraction of the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, and the mass ratio of the metal titanium powder to the metal vanadium powder to the metal aluminum powder is 1:2.33:1.67.
Example 21
Compared with the embodiment 1, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch is characterized in that the metal titanium powder is 0.7%, the metal vanadium powder is 0.3% and the metal aluminum powder is 0.5%. Namely, the total mass fraction of the metal titanium powder, the metal vanadium powder and the metal aluminum powder is unchanged, and the mass ratio of the metal titanium powder to the metal vanadium powder to the metal aluminum powder is 2.33:1:1.67.
Comparative example 1
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 15% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 10% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 12% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose and 9% of added phenolic resin.
Comparative example 2
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the particle size of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the particle size of more than 0mm and less than or equal to 1mm, 15% of chrome corundum particles with the particle size of more than 1mm and less than or equal to 3mm, 10% of chrome corundum particles with the particle size of more than 0mm and less than or equal to 1mm, 11.5% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metal aluminum powder and 9% of added phenolic resin.
Comparative example 3
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the particle size of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the particle size of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the particle size of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the particle size of more than 0mm and less than or equal to 1mm, 11.5% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metallic titanium powder and 9% of added phenolic resin.
Comparative example 4
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 11.5% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metal vanadium powder and 9% of added phenolic resin.
Comparative example 5
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 11% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metallic titanium powder, 0.5% of metallic aluminum powder and 9% of added phenolic resin.
Comparative example 6
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 11% of brown corundum, 14% of green silicon carbide, 5% of silicon nitride iron, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metallic titanium powder, 0.5% of metallic vanadium powder and 9% of added phenolic resin.
Comparative example 7
The vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch comprises the following components in percentage by mass:
10% of titanium calcium aluminate particles with the granularity of more than 1mm and less than or equal to 3mm, 15% of titanium calcium aluminate particles with the granularity of more than 0mm and less than or equal to 1mm, 20% of chrome corundum particles with the granularity of more than 1mm and less than or equal to 3mm, 5% of chrome corundum particles with the granularity of more than 0mm and less than or equal to 1mm, 11% of brown corundum, 14% of green silicon carbide, 5% of ferrosilicon nitride, 7% of coke powder, 3% of high-temperature asphalt powder, 4% of kyanite, 2% of quartz powder, 2.9% of white clay, 0.1% of methyl cellulose, 0.5% of metal vanadium powder, 0.5% of metal aluminum powder and 9% of added phenolic resin.
The materials were prepared according to the mass percentages in the above examples and comparative examples, and after mixing, they were stirred for 2 minutes, 10% of the resin was added, and then stirred for 3 minutes, and vibration casting was performed to form a 40mm×40mm×160mm sample, curing was performed for 24 hours, baking was performed at 200 ℃ ×24 hours, baking was performed in a high-temperature oven at 1350 ℃ ×3 hours, and the test results were shown in table 1 below, for 1400 ℃ ×0.5 hours of hot flexural strength test.
As can be seen from the data in table 1 below, in comparative example 1, no metal titanium powder, metal vanadium powder, metal aluminum powder were added, and no high-melting-point phases such as calcium titanate, aluminum titanate, calcium titanate aluminate, calcium vanadate, aluminum vanadate were formed in the stemming at high temperature, and the high-temperature performance of the stemming was poor. In the comparative example 2, only the metal aluminum powder is added, the oxidation resistance is slightly higher than that of the comparative example 1, and in the comparative examples 3 and 4, only the metal titanium powder and the metal vanadium powder are respectively added, so that calcium titanate, calcium vanadate and the like can be generated at high temperature, and the high-temperature performance is slightly higher than that of the comparative example 1. In comparative examples 5,6 and 7, no metal vanadium powder, metal aluminum powder and metal titanium powder were added, and high-melting-point phases such as calcium titanate, aluminum titanate, calcium titanate aluminate, calcium vanadate and aluminum vanadate were formed at high temperature, and the high-melting-point phases also had a certain oxidation resistance, and vanadium carbide and titanium carbide with high hardness were formed, but vanadium-titanium-aluminum alloys were not formed, and the high-temperature performance was slightly inferior to that of each example. Compared with the comparative examples, the vanadium-titanium-aluminum alloy stemming for the blast furnace iron notch of each embodiment of the invention can generate high-hardness phases of titanium carbide, vanadium carbide and vanadium-titanium-aluminum alloy, and has better high-temperature strength performance than each comparative example.
In each example of the present invention, examples 1 to 6 are more preferable in terms of mass percentage of each component than examples 7 and 8, and the stemming has higher high temperature performance than examples 7 and 8, wherein examples 1 to 4 are further preferable embodiments, the performance is better than examples 5 and 6, and example 1 is the most preferable embodiment.
Examples 1, 9-12 differ in the mass ratio of coke powder to high temperature pitch powder. The air permeability of stemming can be improved by the coke powder and the high-temperature asphalt powder, the heat transfer in a furnace is facilitated to be accelerated, in contrast, the porosity of the coke powder is higher, the air permeability is stronger, the high-temperature asphalt powder has high-temperature cohesiveness, the stemming sintering can be promoted at high temperature, the stemming strength is improved, and the impurity content of the high-temperature asphalt powder is higher. Experiments show that the quality ratio of the coke powder to the high-temperature asphalt powder can be adjusted to influence the performance of the stemming by influencing the ventilation, high-temperature cohesiveness and impurity content of the stemming. Wherein, the mass ratio of the coke powder to the high-temperature asphalt powder in examples 1, 9 and 10 is proper, the ventilation is strong at low temperature, the sintering promotion is strong at high temperature, the impurity content can not influence the performance of stemming, and the obtained stemming has better high-temperature performance than examples 11 and 12.
Examples 1 and 13 to 16 are distinguished by different mass ratios of kyanite to quartz powder. The kyanite and the quartz powder can be subjected to crystal phase transformation at different temperatures and volume expansion of different sizes, and the volume shrinkage of the stemming in different temperature ranges can be relieved after the kyanite and the quartz powder are matched. Because the expansion rates of the kyanite and the quartz powder are different, the different proportions of the kyanite and the quartz powder can lead the stemming to generate different volume expansion, and the quartz powder is excessively added to generate a low melting phase, so that the high-temperature performance of the stemming is reduced. Wherein, the mass ratio of the kyanite to the quartz powder in the examples 1, 13 and 14 is proper, the volume expansion can be adapted to the volume shrinkage of stemming, and the stemming has better high-temperature performance than the examples 15 and 16 without generating excessive low-melting phase.
Examples 1, 17-19 differ in the ratio of the total mass of metallic vanadium powder to metallic titanium powder to the mass of carbon material. The carbon material, the metal titanium powder and the metal vanadium powder can generate high-hardness materials titanium carbide and vanadium carbide, so that the high-temperature strength of the stemming is improved, the high-temperature asphalt powder in the carbon material can promote the sintering of the stemming, and the metal titanium powder, the metal vanadium powder and the metal aluminum powder can also generate high-hardness vanadium titanium aluminum alloy, so that the metal titanium powder and the metal vanadium powder need to generate proper titanium carbide and vanadium carbide with the carbon material, so that the high-temperature performance of the stemming is further improved. Wherein, the ratio of the total mass of the metal vanadium powder and the metal titanium powder to the mass of the carbon material in the examples 1 and 17 is more suitable, and the obtained stemming has better high-temperature performance than the examples 18 and 19.
Examples 1, 20 and 21 were distinguished by the mass ratio of the metal vanadium powder, the metal titanium powder and the metal aluminum powder. The metal aluminum powder, the metal titanium powder and the metal vanadium powder need to have proper mass ratio to generate alloy with better performance, and the reaction of the metal titanium powder, the metal vanadium powder and the carbon material can cause the partial consumption of the metal aluminum powder, the metal titanium powder and the metal vanadium powder. In the embodiment 1, the mass ratio of the metal aluminum powder, the metal titanium powder and the metal vanadium powder is proper, and the obtained stemming has better high-temperature performance than the embodiments 20 and 21.
TABLE 1
| Volume density/g/cm after 200 ℃ x 24h drying 3 | 200 ℃ X 24h post-baking cold state flexural strength/MPa | 200 ℃ X 24h post-baking cold state compressive strength/MPa | Cold state flexural strength/MPa after being burned for 3h at 1350 DEG C | 1350 ℃ And 3h cold state compressive strength/MPa after firing | Permanent line change rate after 1350 ℃ x 3h firing | 1400 ℃ X 0.5h thermal state flexural strength/MPa | |
| Example 1 | 2.3 | 2.7 | 26.9 | 3.5 | 45.2 | 0% | 1.9 |
| Example 2 | 2.2 | 2.5 | 24.5 | 2.7 | 32.5 | 0.1% | 1.6 |
| Example 3 | 2.1 | 2.4 | 24.3 | 2.9 | 33.5 | 0.1% | 1.5 |
| Example 4 | 2.2 | 2.4 | 23.6 | 2.7 | 33.7 | 0.1% | 1.4 |
| Example 5 | 2.2 | 2.1 | 22.8 | 2.6 | 30.2 | 0.1% | 1.2 |
| Example 6 | 2.3 | 2.2 | 22.4 | 2.5 | 29.3 | 0.2% | 1.1 |
| Example 7 | 2.1 | 2.0 | 20.1 | 2.3 | 28.6 | 0.3% | 1.0 |
| Example 8 | 2.4 | 2.1 | 20.6 | 2.2 | 28.1 | 0.3% | 1.0 |
| Example 9 | 2.3 | 2.8 | 26.8 | 3.3 | 42.2 | 0% | 1.8 |
| Example 10 | 2.3 | 2.5 | 25.3 | 3.2 | 43.1 | 0% | 1.6 |
| Example 11 | 2.3 | 2.9 | 26.9 | 2.5 | 37.6 | 0% | 1.2 |
| Example 12 | 2.3 | 2.4 | 24.7 | 2.3 | 36.2 | 0.1% | 1.1 |
| Example 13 | 2.3 | 2.6 | 26.4 | 3.4 | 41.5 | 0% | 1.7 |
| Example 14 | 2.3 | 2.5 | 25.4 | 3.2 | 43.2 | 0% | 1.8 |
| Example 15 | 2.3 | 2.7 | 26.7 | 2.7 | 38.2 | -0.1% | 1.3 |
| Example 16 | 2.3 | 2.6 | 24.6 | 2.5 | 36.1 | 0% | 1.1 |
| Example 17 | 2.3 | 2.6 | 26.2 | 3.3 | 42.1 | 0% | 1.6 |
| Example 18 | 2.3 | 2.5 | 25.3 | 2.4 | 35.3 | 0.1% | 1.2 |
| Example 19 | 2.3 | 2.5 | 26.6 | 2.6 | 34.6 | 0.1% | 1.0 |
| Example 20 | 2.3 | 2.6 | 26.4 | 2.4 | 34.1 | 0% | 1.2 |
| Example 21 | 2.3 | 2.6 | 26.2 | 2.7 | 36.5 | 0% | 1.1 |
| Comparative example 1 | 2 | 2 | 21.5 | 1.3 | 19 | -1% | 0.7 |
| Comparative example 2 | 2.2 | 2.1 | 23.2 | 1.7 | 22.9 | -1% | 1.1 |
| Comparative example 3 | 2.1 | 2.2 | 23.9 | 1.7 | 21.8 | -0.8% | 0.9 |
| Comparative example 4 | 2 | 2.2 | 24.1 | 1.8 | 22.4 | -0.6% | 1.2 |
| Comparative example 5 | 2 | 2.5 | 24.3 | 1.9 | 25.1 | -0.5% | 1.1 |
| Comparative example 6 | 2.1 | 2.2 | 24.1 | 2 | 27.2 | 0% | 1.3 |
| Comparative example 7 | 2.2 | 2.3 | 23.6 | 2.1 | 24.8 | 0.1% | 0.9 |
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (5)
1. The vanadium-titanium-aluminum alloy stemming for the blast furnace iron plugging port is characterized by comprising the following components in percentage by mass:
22-28% of calcium titanate aluminate, 23-29% of chrome corundum, 9-14% of brown corundum, 12-15% of green silicon carbide, 3-6% of sintering promoter, 8-12% of carbon material, 5-7% of expanding agent, 2-5% of plasticizer, 0.5-1% of metallic titanium powder, 0.5-1% of metallic vanadium powder and 0.5-1% of metallic aluminum powder; adding 7% -10% of liquid bonding agent; the expanding agent is a mixture of kyanite and quartz powder, and the mass ratio of the kyanite to the quartz powder is 3-5:2; the ratio of the total mass of the metal vanadium powder to the metal titanium powder to the mass of the carbon material is 1-1.5:10; the mass ratio of the metal aluminum powder to the metal titanium powder to the metal vanadium powder is 0.5-1:0.5-1; the carbon material is a mixture of coke powder and high-temperature asphalt powder, and the mass ratio of the coke powder to the high-temperature asphalt powder is 6-8:3.
2. The vanadium-titanium-aluminum alloy stemming for blast furnace iron notch plugging according to claim 1, which is characterized by comprising the following components in percentage by mass:
25% of calcium titanate aluminate, 25% of chrome corundum, 10% -12% of brown corundum, 14% of green silicon carbide, 5% of sintering promoter, 10% of carbon material, 6% of expanding agent, 3% of plasticizer, 0.5% -1% of metallic titanium powder, 0.5% -1% of metallic vanadium powder and 0.5% -1% of metallic aluminum powder; 8% -10% of externally added liquid bonding agent.
3. The vanadium-titanium-aluminum alloy stemming for blast furnace iron notch plugging according to claim 1, wherein: the plasticizer is a mixture of white clay and methyl cellulose, and the mass ratio of the white clay to the methyl cellulose is 15-40:1.
4. The vanadium-titanium-aluminum alloy stemming for blast furnace iron notch plugging according to claim 1, wherein:
The calcium titanate aluminate comprises particles with the particle size of more than 1mm and less than or equal to 3mm and particles with the particle size of more than 0mm and less than or equal to 1 mm; the mass ratio of the particles with the particle size more than 1mm and less than or equal to 3mm to the particles with the particle size more than 0mm and less than or equal to 1mm is 1:1-2;
The chrome corundum comprises particles with the particle size of more than 1mm and less than or equal to 3mm and particles with the particle size of more than 0mm and less than or equal to 1 mm; the mass ratio of the particles with the particle size of more than 1mm and less than or equal to 3mm to the particles with the particle size of more than 0mm and less than or equal to 1mm is 1.5-4:1.
5. The vanadium-titanium-aluminum alloy stemming for blast furnace iron notch plugging according to claim 1, wherein:
The liquid bonding agent is phenolic resin.
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| CN102617157A (en) * | 2012-02-22 | 2012-08-01 | 北京首钢耐材炉料有限公司 | Stemming and method for preparing same |
| CN110357573A (en) * | 2019-06-27 | 2019-10-22 | 上海宝钢工业技术服务有限公司 | Low benzo [a] pyrene type ring protects blast furnace mud and preparation method |
| CN110963789A (en) * | 2018-09-29 | 2020-04-07 | 中冶建筑研究总院有限公司 | Blast furnace crack pouring material and preparation method thereof |
| CN115650729A (en) * | 2022-11-04 | 2023-01-31 | 烟台大学 | Di-titanium-vanadium-aluminum-carbon ceramic powder material and preparation method and application thereof |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617157A (en) * | 2012-02-22 | 2012-08-01 | 北京首钢耐材炉料有限公司 | Stemming and method for preparing same |
| CN110963789A (en) * | 2018-09-29 | 2020-04-07 | 中冶建筑研究总院有限公司 | Blast furnace crack pouring material and preparation method thereof |
| CN110357573A (en) * | 2019-06-27 | 2019-10-22 | 上海宝钢工业技术服务有限公司 | Low benzo [a] pyrene type ring protects blast furnace mud and preparation method |
| CN115650729A (en) * | 2022-11-04 | 2023-01-31 | 烟台大学 | Di-titanium-vanadium-aluminum-carbon ceramic powder material and preparation method and application thereof |
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