CN113528753A - Multi-element alloy deoxidizer for steelmaking and preparation process thereof - Google Patents
Multi-element alloy deoxidizer for steelmaking and preparation process thereof Download PDFInfo
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- 238000009628 steelmaking Methods 0.000 title claims abstract description 28
- 229910001325 element alloy Inorganic materials 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 88
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052788 barium Inorganic materials 0.000 claims abstract description 46
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 41
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 40
- 239000010936 titanium Substances 0.000 claims abstract description 32
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011777 magnesium Substances 0.000 claims abstract description 26
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 26
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 25
- 239000011574 phosphorus Substances 0.000 claims abstract description 25
- 239000011780 sodium chloride Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000292 calcium oxide Substances 0.000 claims abstract description 13
- 239000011656 manganese carbonate Substances 0.000 claims abstract description 13
- 235000006748 manganese carbonate Nutrition 0.000 claims abstract description 13
- 229940093474 manganese carbonate Drugs 0.000 claims abstract description 13
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 claims abstract description 13
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 13
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims description 57
- 239000002994 raw material Substances 0.000 claims description 48
- 229910045601 alloy Inorganic materials 0.000 claims description 44
- 239000000956 alloy Substances 0.000 claims description 44
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 43
- 238000010891 electric arc Methods 0.000 claims description 40
- 238000000227 grinding Methods 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 16
- 238000007873 sieving Methods 0.000 claims description 16
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 13
- 244000060011 Cocos nucifera Species 0.000 claims description 13
- 239000002082 metal nanoparticle Substances 0.000 claims description 12
- 239000012266 salt solution Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 9
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 8
- 239000001307 helium Substances 0.000 claims description 8
- 229910052734 helium Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- 238000011268 retreatment Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 2
- 239000000969 carrier Substances 0.000 claims 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 6
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002090 carbon oxide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- -1 rare earth sulfide Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
Abstract
The invention discloses a multi-element alloy deoxidizer for steelmaking and a preparation process thereof, relating to the technical field of deoxidizers. The invention comprises the following components in percentage by weight: 0.05-0.15% of barium carbonate, 0.01-0.25% of sodium chloride, 0.01-0.25% of phosphorus, 1-2% of titanium, 19-23% of manganese carbonate, 19-23% of calcium oxide, 21-27% of barium-loaded activated carbon, 9-11% of magnesium, 3-7% of barium, 4-6% of aluminum, 9-14% of carbon silicide, 0.1-1% of rare earth elements and the balance of iron. The invention makes the deoxidizer can efficiently complete the deoxidation work in the steelmaking process through the material composition and the preparation process design of the deoxidizer, and the deoxidizer increases the contents of carbonic acid series elements, barium and carbon in the element composition, and can form gaseous deoxidation products without influencing the steel quality during the deoxidation through the increase and increase of the contents of the elements.
Description
Technical Field
The invention belongs to the technical field of deoxidizers, and particularly relates to a multi-element alloy deoxidizer for steelmaking and a preparation process thereof.
Background
Since the century, the steel yield in China is rapidly increased, the yield of electric furnace steel making and converter steel making accounts for more than 95% of the total steel yield, and deoxidizing agents are required to be added in both steel making methods to deoxidize molten steel.
At present, the steel-making process uses aluminium and aluminium-base composite alloy as deoxidant, and during the steel-making deoxidization process S is easy to produce secondary oxidation to form Al2O3The inclusion not only affects the quality of steel, but also causes nozzle clogging, so a novel deoxidizer for steelmaking is urgently needed in the market to solve the problems proposed in the background art.
Disclosure of Invention
The invention aims to provide a multi-element alloy deoxidizer for steelmaking and a preparation process thereof, and solves the problems of low deoxidation rate and difficult removal of inclusions of the existing deoxidizer through the material composition and the preparation process design of the deoxidizer.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a multi-element alloy deoxidizer for steelmaking, which comprises the following components in percentage by weight:
0.05-0.15% of barium carbonate, 0.01-0.25% of sodium chloride, 0.01-0.25% of phosphorus, 1-2% of titanium, 19-23% of manganese carbonate, 19-23% of calcium oxide, 21-27% of barium-loaded activated carbon, 9-11% of magnesium, 3-7% of barium, 4-6% of aluminum, 9-14% of carbon silicide, 0.1-1% of rare earth elements and the balance of iron.
Preferably, the barium-loaded activated carbon comprises a coconut shell activated carbon carrier and barium metal nanoparticles, the barium-loaded activated carbon is prepared by mixing, heat-treating and grinding the coconut shell activated carbon carrier and the barium metal nanoparticles, and the mixing ratio of the coconut shell activated carbon carrier to the barium metal nanoparticles is 20: 3, the particle size of the barium-loaded activated carbon is 5mm-8 mm.
Preferably, the magnesium, the phosphorus, the aluminum and the titanium are all in a powdery state, the purity of the magnesium, the phosphorus, the aluminum and the titanium is more than or equal to 99%, and the particle size of the magnesium, the phosphorus, the aluminum and the titanium is 4-9 mm.
Preferably, the rare earth element is any one or a mixture of more than one of cerium, lanthanum or neodymium, the rare earth element is in a powder structure, and the particle size of the rare earth element is 5mm-8 mm.
Preferably, the preparation process of the multi-element alloy deoxidizer for steelmaking comprises the following steps:
SS001, material taking: weighing barium carbonate, sodium chloride, phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum, silicon carbon and rare earth elements according to the weight percentage;
SS002, pretreatment: putting phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum and silicon carbon into a grinder for grinding, fully grinding and then sieving with a 200-mesh sieve, after screening, putting the dried raw materials into a stirrer for fully stirring to obtain raw materials to be melted, independently grinding sodium chloride and then sieving with the 200-mesh sieve for later use, independently grinding rare earth elements for later use, and independently grinding barium carbonate and then sieving with the 200-mesh sieve for later use;
SS003, preheating: preheating the raw materials to be melted and the rare earth elements in a medium-frequency heat preservation furnace, and keeping the internal temperature of the medium-frequency heat preservation furnace after the raw materials to be melted and the rare earth elements are preheated to 250-300 ℃;
SS004, melting: preparing an electric arc furnace, after the electric arc furnace is prepared, putting the preheated raw materials to be melted and the rare earth metal into the electric arc furnace, after the putting is finished, fully arcing electrodes in the electric arc furnace, fully burning and melting the raw materials in the electric arc furnace after the arcing is finished, raising the furnace temperature in the electric arc furnace by 45 ℃/min, and when the furnace temperature in the electric arc furnace is raised to 1700-2100 ℃, continuously processing the raw materials in the electric arc furnace for 80-120 min at the temperature;
SS005, preparation: after the raw materials in the electric arc furnace are continuously processed for 80-120 min, pouring the raw materials in the electric arc furnace into a fixed mold pot for shaping and cooling, and after the raw materials are cooled to 200-400 ℃, obtaining an initially cooled alloy;
SS006, post-treatment: placing the primarily cooled alloy into a medium-frequency heat preservation furnace for heat preservation, wherein the furnace temperature in the medium-frequency heat preservation furnace is set to be 500-600 ℃, after the alloy is placed into the medium-frequency heat preservation furnace for 30min, filling hydrogen-helium mixed reducing gas with a set mixing ratio into the medium-frequency heat preservation furnace, after the reducing gas is filled, treating the alloy in the medium-frequency heat preservation furnace for 5-10 min, after the alloy is treated in the medium-frequency heat preservation furnace for 5-10 min, cooling the furnace temperature of the medium-frequency heat preservation furnace to 180 ℃ at a set speed, after the furnace temperature of the medium-frequency heat preservation furnace reaches the temperature, standing the alloy in the medium-frequency heat preservation furnace, and after the alloy is kept in the medium-frequency heat preservation furnace for a specified time, taking out the alloy in the medium-frequency heat preservation furnace and placing the alloy in a room-temperature environment for cooling;
SS007, retreatment: and placing the cooled alloy into a crusher for crushing, sieving with a 200-mesh sieve to obtain a material to be dried, drying the raw material to be dried, roasting the dried product after drying, preparing a barium carbonate salt solution by using barium carbonate and sodium chloride after roasting, mixing the roasted product with the barium carbonate salt solution, drying by blowing, and granulating to obtain the multi-element alloy deoxidizer.
Preferably, the drying time of the raw material in the SS007 step is 120-360 min, the drying temperature is 100-150 ℃, the roasting temperature of the dried product is 500-600 ℃, and the roasting time is 120-360 min.
Preferably, the volume ratio of the hydrogen-helium mixed reducing gas in the SS006 step is 2:3, and the standing time of the alloy in the SS006 step is 1h-2 h.
Preferably, the barium carbonate concentration in the barium carbonate salt solution in the SS007 step is 0.5%.
The invention has the following beneficial effects:
1. the deoxidizer can efficiently complete the deoxidation work in the steelmaking process through the material composition and the preparation process design of the deoxidizer, the contents of carbonic acid series elements, barium and carbon are increased in the element composition of the deoxidizer, and gaseous deoxidation products which do not influence the steel quality can be formed during deoxidation through the increase and increase of the element contents.
2. According to the invention, through the addition of sodium chloride, the oxygen absorption reaction of iron can be promoted, the deoxidation strength and the deoxidation rate of iron are further improved, through the increase of barium-loaded activated carbon, the deoxidation effect and the surface activity of the activated carbon can be effectively improved, through the loading design of metal barium on the activated carbon, the carbon-oxygen reaction can be effectively promoted, the reaction temperature is further reduced, and through the design of titanium, barium, magnesium and aluminum elements, the crystal grains can be refined and the crystal can be optimized for molten steel.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram showing the comparative structure of the deoxidizing capacity of each element of a multi-element alloy deoxidizer for steelmaking;
FIG. 2 is a schematic diagram of a deoxidizer product of a multi-element alloy deoxidizer for steelmaking;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-2, the present invention relates to a multi-element alloy deoxidizer for steel making, which comprises the following components by weight percentage:
0.05% of barium carbonate, 0.01% of sodium chloride, 0.01% of phosphorus, 1% of titanium, 19% of manganese carbonate, 19% of calcium oxide, 21% of barium-loaded activated carbon, 9% of magnesium, 3% of barium, 4% of aluminum, 9% of carbon silicide, 0.1% -1% of rare earth elements and the balance of iron.
Barium carbonate of formula BaCO3Molecular weight 197.35, hexagonal fine crystals or white powder, hardly soluble in water, density 4.43 g/cm2Melting point 1740 deg.C, decomposition at 1450 deg.C, and discharging carbon dioxide, when barium carbonate is put in molten steel, the deoxidization product of barium carbonate is carbon dioxide, IIThe carbon oxide can quickly overflow from the molten steel, and can carry out a certain degree of carrying out carrying-out of the inclusion when the carbon oxide overflows, and the purity of the molten steel is not influenced, while the barium can spheroidize the inclusion in the molten steel;
the rare earth elements can react with O, S to generate rare earth oxide, rare earth sulfide and rare earth oxysulfide, and reduce oxygen and sulfur in steel, the rare earth oxide and sulfide has high melting point, high density and small particle size, and the rare earth elements have the outstanding advantages of spheroidizing inclusions in steel, being beneficial to improving the performance of steel and having the function of optimizing crystals.
The sodium chloride is in the form of salt, and can promote the oxygen absorption reaction of iron by adding the sodium chloride, so that the deoxidation strength and the deoxidation rate of the iron are improved;
titanium is a strong deoxidizer, with a deoxidizing power stronger than that of silicon and weaker than that of aluminum, when titanium<At 0.2%, the deoxygenated product was TiO2Or Ti305The size of the deoxidation product of titanium is 16-18um, is approximately spherical and is uniformly distributed in the crystal grains, the titanium can also form highly dispersed TiN in the molten steel, the period size is 4-14um, the TiN can be used as an involuntary crystallization core to refine the crystal grains, the TiN can also prevent the steel casting from generating brittle fracture, and when the content of the titanium is 0.06 percent, flaky eutectic sulfide can be formed along the crystal boundary to reduce the impact toughness of the steel;
the barium-loaded activated carbon comprises a coconut shell activated carbon carrier and barium metal nanoparticles, the barium-loaded activated carbon is prepared by mixing, thermally treating and grinding the coconut shell activated carbon carrier and the barium metal nanoparticles, and the mixing ratio of the coconut shell activated carbon carrier to the barium metal nanoparticles is 20: 3, the particle size of the barium-loaded activated carbon is 5 mm;
compare traditional active carbon, the superficial area in coconut shell active carbon and hole is equivalent to 2.5 times of traditional active carbon, and through the load of active metal barium on active carbon, can effectively improve the deoxidation effect and the surface activity of active carbon, and through the load design of metal barium on active carbon, can effectively promote the carbon oxygen reaction and then reduce reaction temperature.
Wherein, the magnesium, the phosphorus, the aluminum and the titanium are all in a powdery state, the purity of the magnesium, the phosphorus, the aluminum and the titanium is more than or equal to 99 percent, and the grain diameter of the magnesium, the phosphorus, the aluminum and the titanium is 4 mm.
Wherein the rare earth element is cerium, the rare earth element is in a powder structure, and the particle size of the rare earth element is 5 mm.
The preparation process of the multi-element alloy deoxidizer for steelmaking comprises the following steps:
SS001, material taking: weighing barium carbonate, sodium chloride, phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum, silicon carbon and rare earth elements according to the weight percentage;
SS002, pretreatment: putting phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum and silicon carbon into a grinder for grinding, fully grinding and then sieving with a 200-mesh sieve, after screening, putting the dried raw materials into a stirrer for fully stirring to obtain raw materials to be melted, independently grinding sodium chloride and then sieving with the 200-mesh sieve for later use, independently grinding rare earth elements for later use, and independently grinding barium carbonate and then sieving with the 200-mesh sieve for later use;
SS003, preheating: preheating the raw materials to be melted and the rare earth elements in a medium-frequency heat preservation furnace, and keeping the internal temperature of the medium-frequency heat preservation furnace after the raw materials to be melted and the rare earth elements are preheated to 250 ℃;
SS004, melting: preparing an electric arc furnace, after the electric arc furnace is prepared, putting the preheated raw materials to be melted and the rare earth metal into the electric arc furnace, fully arcing electrodes in the electric arc furnace after the putting is finished, fully burning and melting the raw materials in the electric arc furnace after the arcing is finished, raising the furnace temperature in the electric arc furnace at 45 ℃/min, and continuously processing the raw materials in the electric arc furnace at the temperature for 80min when the furnace temperature in the electric arc furnace is raised to 1700 ℃;
SS005, preparation: after the raw materials in the electric arc furnace are continuously processed for 80min, pouring the raw materials in the electric arc furnace into a fixed mold pot for shaping and cooling, and after the raw materials are cooled to 200 ℃, obtaining an initially cooled alloy;
SS006, post-treatment: placing the primarily cooled alloy into a medium-frequency heat preservation furnace for heat preservation, wherein the furnace temperature in the medium-frequency heat preservation furnace is set to be 500 ℃, the alloy is placed into the medium-frequency heat preservation furnace for 30min, hydrogen-helium mixed reducing gas with a set mixing ratio is filled into the medium-frequency heat preservation furnace, the alloy is treated in the medium-frequency heat preservation furnace for 5min after the reducing gas is filled, the furnace temperature of the medium-frequency heat preservation furnace is reduced to 180 ℃ at a set speed after the alloy is treated in the medium-frequency heat preservation furnace for 5min, the alloy is placed in the medium-frequency heat preservation furnace for standing after the furnace temperature of the medium-frequency heat preservation furnace reaches the temperature, and the alloy is taken out of the medium-frequency heat preservation furnace and placed in a room-temperature environment for cooling after the alloy is placed in the medium-frequency heat preservation furnace for a specified time;
SS007, retreatment: and placing the cooled alloy into a crusher for crushing, sieving with a 200-mesh sieve to obtain a material to be dried, drying the raw material to be dried, roasting the dried product after drying, preparing a barium carbonate salt solution by using barium carbonate and sodium chloride after roasting, mixing the roasted product with the barium carbonate salt solution, drying by blowing, and granulating to obtain the multi-element alloy deoxidizer.
Wherein, the drying time of the raw material in the SS007 step is 120min, the drying temperature is 100 ℃, the roasting temperature of the dried product is 500 ℃, and the roasting time is 120 min.
Wherein the volume ratio of the hydrogen-helium mixed reducing gas in the SS006 step is 2:3, and the standing time of the alloy in the SS006 step is 1 h.
Wherein the concentration of barium carbonate in the barium carbonate salt solution in the SS007 step is 0.5%.
Example two
Referring to fig. 1-2, the present invention relates to a multi-element alloy deoxidizer for steel making, which comprises the following components by weight percentage:
0.15% of barium carbonate, 0.25% of sodium chloride, 0.25% of phosphorus, 2% of titanium, 20% of manganese carbonate, 20% of calcium oxide, 23% of barium-loaded activated carbon, 10% of magnesium, 4% of barium, 4.5% of aluminum, 10% of carbon silicide, 0.15% of rare earth elements and the balance of iron.
The barium-loaded activated carbon comprises a coconut shell activated carbon carrier and barium metal nanoparticles, the barium-loaded activated carbon is prepared by mixing, thermally treating and grinding the coconut shell activated carbon carrier and the barium metal nanoparticles, and the mixing ratio of the coconut shell activated carbon carrier to the barium metal nanoparticles is 20: 3, the particle size of the barium-loaded activated carbon is 7 mm.
Wherein, the magnesium, the phosphorus, the aluminum and the titanium are all in a powdery state, the purity of the magnesium, the phosphorus, the aluminum and the titanium is more than or equal to 99 percent, and the grain diameter of the magnesium, the phosphorus, the aluminum and the titanium is 8 mm.
Wherein the rare earth element is a mixture of cerium and lanthanum, the rare earth element is in a powder structure, and the particle size of the rare earth element is 7 mm.
The preparation process of the multi-element alloy deoxidizer for steelmaking comprises the following steps:
SS001, material taking: weighing barium carbonate, sodium chloride, phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum, silicon carbon and rare earth elements according to the weight percentage;
SS002, pretreatment: putting phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum and silicon carbon into a grinder for grinding, fully grinding and then sieving with a 200-mesh sieve, after screening, putting the dried raw materials into a stirrer for fully stirring to obtain raw materials to be melted, independently grinding sodium chloride and then sieving with the 200-mesh sieve for later use, independently grinding rare earth elements for later use, and independently grinding barium carbonate and then sieving with the 200-mesh sieve for later use;
SS003, preheating: preheating the raw materials to be melted and the rare earth elements in a medium-frequency heat preservation furnace, and keeping the internal temperature of the medium-frequency heat preservation furnace after the raw materials to be melted and the rare earth elements are preheated to 260 ℃;
SS004, melting: preparing an electric arc furnace, after the electric arc furnace is prepared, putting the preheated raw materials to be melted and the rare earth metal into the electric arc furnace, fully arcing electrodes in the electric arc furnace after the putting is finished, fully burning and melting the raw materials in the electric arc furnace after the arcing is finished, raising the furnace temperature in the electric arc furnace at 45 ℃/min, and continuously processing the raw materials in the electric arc furnace at the temperature for 90min when the furnace temperature in the electric arc furnace is raised to 1900 ℃;
SS005, preparation: after the raw materials in the electric arc furnace are continuously processed for 90min, pouring the raw materials in the electric arc furnace into a fixed mold pot for shaping and cooling, and after the raw materials are cooled to 350 ℃, obtaining an initially cooled alloy;
SS006, post-treatment: placing the primarily cooled alloy into a medium-frequency heat preservation furnace for heat preservation, wherein the furnace temperature in the medium-frequency heat preservation furnace is set to 550 ℃ during heat preservation, filling hydrogen and helium mixed reducing gas with a set mixing ratio into the medium-frequency heat preservation furnace after the alloy is placed into the medium-frequency heat preservation furnace for 30min, treating the alloy in the medium-frequency heat preservation furnace for 7min, cooling the furnace temperature of the medium-frequency heat preservation furnace to 180 ℃ at a set speed after the alloy is treated in the medium-frequency heat preservation furnace for 7min, standing the alloy in the medium-frequency heat preservation furnace after the furnace temperature of the medium-frequency heat preservation furnace reaches the temperature, and taking out the alloy in the medium-frequency heat preservation furnace and placing the alloy in a room-temperature environment for cooling after the alloy is kept in the medium-frequency heat preservation furnace for a specified time;
SS007, retreatment: and placing the cooled alloy into a crusher for crushing, sieving with a 200-mesh sieve to obtain a material to be dried, drying the raw material to be dried, roasting the dried product after drying, preparing a barium carbonate salt solution by using barium carbonate and sodium chloride after roasting, mixing the roasted product with the barium carbonate salt solution, drying by blowing, and granulating to obtain the multi-element alloy deoxidizer.
Wherein, the drying time of the raw material in the SS007 step is 200min, the drying temperature is 120 ℃, the roasting temperature of the dried product is 560 ℃, and the roasting time is 150 min.
Wherein the volume ratio of the hydrogen-helium mixed reducing gas in the SS006 step is 2:3, and the standing time of the alloy in the SS006 step is 2 h.
Wherein the concentration of barium carbonate in the barium carbonate salt solution in the SS007 step is 0.5%.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A multi-element alloy deoxidizer for steelmaking is characterized in that: the components and contents are as follows according to the weight percentage:
0.05-0.15% of barium carbonate, 0.01-0.25% of sodium chloride, 0.01-0.25% of phosphorus, 1-2% of titanium, 19-23% of manganese carbonate, 19-23% of calcium oxide, 21-27% of barium-loaded activated carbon, 9-11% of magnesium, 3-7% of barium, 4-6% of aluminum, 9-14% of carbon silicide, 0.1-1% of rare earth elements and the balance of iron.
2. The multi-element alloy deoxidizer for steelmaking as claimed in claim 1, wherein the barium-loaded activated carbon comprises coconut shell activated carbon carriers and barium metal nanoparticles, the barium-loaded activated carbon is prepared by mixing, heating and grinding the coconut shell activated carbon carriers and the barium metal nanoparticles, and the mixing ratio of the coconut shell activated carbon carriers to the barium metal nanoparticles is 20: 3, the particle size of the barium-loaded activated carbon is 5mm-8 mm.
3. The multi-element alloy deoxidizer for steelmaking as claimed in claim 1, wherein the magnesium, the phosphorus, the aluminum and the titanium are all in a powdery state, the purity of the magnesium, the phosphorus, the aluminum and the titanium is 99% or more, and the particle size of the magnesium, the phosphorus, the aluminum and the titanium is 4mm to 9 mm.
4. The multi-element alloy deoxidizer for steelmaking as claimed in claim 1, wherein the rare earth element is any one or a mixture of more than one of cerium, lanthanum or neodymium, the rare earth element has a powder structure, and the particle size of the rare earth element is 5mm-8 mm.
5. The process for preparing a multi-element alloy deoxidizer for steelmaking as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps of:
SS001, material taking: weighing barium carbonate, sodium chloride, phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum, silicon carbon and rare earth elements according to the weight percentage;
SS002, pretreatment: putting phosphorus, titanium, manganese carbonate, calcium oxide, barium-loaded activated carbon, magnesium, barium, aluminum and silicon carbon into a grinder for grinding, fully grinding and then sieving with a 200-mesh sieve, after screening, putting the dried raw materials into a stirrer for fully stirring to obtain raw materials to be melted, independently grinding sodium chloride and then sieving with the 200-mesh sieve for later use, independently grinding rare earth elements for later use, and independently grinding barium carbonate and then sieving with the 200-mesh sieve for later use;
SS003, preheating: preheating the raw materials to be melted and the rare earth elements in a medium-frequency heat preservation furnace, and keeping the internal temperature of the medium-frequency heat preservation furnace after the raw materials to be melted and the rare earth elements are preheated to 250-300 ℃;
SS004, melting: preparing an electric arc furnace, after the electric arc furnace is prepared, putting the preheated raw materials to be melted and the rare earth metal into the electric arc furnace, after the putting is finished, fully arcing electrodes in the electric arc furnace, fully burning and melting the raw materials in the electric arc furnace after the arcing is finished, raising the furnace temperature in the electric arc furnace by 45 ℃/min, and when the furnace temperature in the electric arc furnace is raised to 1700-2100 ℃, continuously processing the raw materials in the electric arc furnace for 80-120 min at the temperature;
SS005, preparation: after the raw materials in the electric arc furnace are continuously processed for 80-120 min, pouring the raw materials in the electric arc furnace into a fixed mold pot for shaping and cooling, and after the raw materials are cooled to 200-400 ℃, obtaining an initially cooled alloy;
SS006, post-treatment: placing the primarily cooled alloy into a medium-frequency heat preservation furnace for heat preservation, wherein the furnace temperature in the medium-frequency heat preservation furnace is set to be 500-600 ℃, after the alloy is placed into the medium-frequency heat preservation furnace for 30min, filling hydrogen-helium mixed reducing gas with a set mixing ratio into the medium-frequency heat preservation furnace, after the reducing gas is filled, treating the alloy in the medium-frequency heat preservation furnace for 5-10 min, after the alloy is treated in the medium-frequency heat preservation furnace for 5-10 min, cooling the furnace temperature of the medium-frequency heat preservation furnace to 180 ℃ at a set speed, after the furnace temperature of the medium-frequency heat preservation furnace reaches the temperature, standing the alloy in the medium-frequency heat preservation furnace, and after the alloy is kept in the medium-frequency heat preservation furnace for a specified time, taking out the alloy in the medium-frequency heat preservation furnace and placing the alloy in a room-temperature environment for cooling;
SS007, retreatment: and placing the cooled alloy into a crusher for crushing, sieving with a 200-mesh sieve to obtain a material to be dried, drying the raw material to be dried, roasting the dried product after drying, preparing a barium carbonate salt solution by using barium carbonate and sodium chloride after roasting, mixing the roasted product with the barium carbonate salt solution, drying by blowing, and granulating to obtain the multi-element alloy deoxidizer.
6. The preparation process of the multi-element alloy deoxidizer for steelmaking as claimed in claim 5, wherein the drying time of the raw material in the SS007 step is 120-360 min, the drying temperature is 100-150 ℃, the roasting temperature of the dried product is 500-600 ℃, and the roasting time is 120-360 min.
7. The preparation process of the multi-element alloy deoxidizer for steelmaking as claimed in claim 5, wherein the volume ratio of hydrogen and helium mixed reducing gas in the SS006 step is 2:3, and the standing time of the alloy in the SS006 step is 1-2 h.
8. The process of claim 5, wherein the barium carbonate concentration in the barium carbonate salt solution in the SS007 step is 0.5%.
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