CN117265370A - High-purity silicon-manganese alloy for silicon steel and preparation method thereof - Google Patents
High-purity silicon-manganese alloy for silicon steel and preparation method thereof Download PDFInfo
- Publication number
- CN117265370A CN117265370A CN202311257002.4A CN202311257002A CN117265370A CN 117265370 A CN117265370 A CN 117265370A CN 202311257002 A CN202311257002 A CN 202311257002A CN 117265370 A CN117265370 A CN 117265370A
- Authority
- CN
- China
- Prior art keywords
- silicon
- percent
- equal
- less
- manganese
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 92
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910000914 Mn alloy Inorganic materials 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 88
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 84
- 239000010703 silicon Substances 0.000 claims abstract description 84
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000011572 manganese Substances 0.000 claims abstract description 51
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 48
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052742 iron Inorganic materials 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 29
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 28
- 239000011593 sulfur Substances 0.000 claims abstract description 28
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 27
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 27
- 239000011574 phosphorus Substances 0.000 claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 26
- 239000011651 chromium Substances 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 25
- 239000010949 copper Substances 0.000 claims abstract description 25
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 25
- 239000010955 niobium Substances 0.000 claims abstract description 25
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000010936 titanium Substances 0.000 claims abstract description 25
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 25
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 25
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 25
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011575 calcium Substances 0.000 claims abstract description 24
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 24
- 229910021419 crystalline silicon Inorganic materials 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000000155 melt Substances 0.000 claims description 57
- 229910052751 metal Inorganic materials 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 49
- 229910045601 alloy Inorganic materials 0.000 claims description 43
- 239000000956 alloy Substances 0.000 claims description 43
- 238000002844 melting Methods 0.000 claims description 30
- 230000008018 melting Effects 0.000 claims description 30
- 239000002893 slag Substances 0.000 claims description 28
- 230000006698 induction Effects 0.000 claims description 19
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 16
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 16
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 239000010439 graphite Substances 0.000 claims description 16
- 239000004571 lime Substances 0.000 claims description 16
- 238000003723 Smelting Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052737 gold Inorganic materials 0.000 claims description 8
- 239000010931 gold Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 4
- 239000011863 silicon-based powder Substances 0.000 claims description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 3
- IWTGVMOPIDDPGF-UHFFFAOYSA-N [Mn][Si][Fe] Chemical compound [Mn][Si][Fe] IWTGVMOPIDDPGF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 2
- 239000002994 raw material Substances 0.000 abstract description 3
- 241001062472 Stokellia anisodon Species 0.000 abstract description 2
- 229910000617 Mangalloy Inorganic materials 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000001816 cooling Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000004090 dissolution Methods 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 11
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 8
- 238000004080 punching Methods 0.000 description 7
- 241000416536 Euproctis pseudoconspersa Species 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 239000011812 mixed powder Substances 0.000 description 5
- 238000009489 vacuum treatment Methods 0.000 description 5
- 239000000571 coke Substances 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910000720 Silicomanganese Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a high-purity silicon-manganese alloy for silicon steel and a preparation method thereof, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 50-60% of silicon; 25-35% of manganese; niobium is less than or equal to 0.01 percent; vanadium is less than or equal to 0.01 percent; titanium is less than or equal to 0.01 percent; carbon is less than or equal to 0.012 percent; phosphorus is less than or equal to 0.02 percent; sulfur is less than or equal to 0.01 percent; calcium is less than or equal to 0.05 percent; aluminum is less than or equal to 0.03 percent; chromium is less than or equal to 0.05 percent; copper is less than or equal to 0.1 percent; iron balance. The preparation method of the high-purity silicon-manganese alloy for silicon steel, disclosed by the invention, adopts high-purity silicon or crystalline silicon cutting powder for photovoltaic as a raw material to smelt silicon liquid, and further mixes the silicon liquid with cold electrolytic manganese and silicon steel leftover materials to obtain the high-purity silicon-manganese alloy. The process is simple and feasible, has low cost and has the advantage of large-scale popularization and use.
Description
Technical Field
The invention belongs to the field of silicon-manganese alloy production, and particularly relates to a high-purity silicon-manganese-iron alloy for silicon steel and a preparation method thereof.
Background
Electrical steel, also known as silicon steel, is one of the most important magnetic materials for manufacturing motors, transformer cores, and various electrical components. The silicon steel has complex manufacturing process, multiple working procedures and strict control of components. Different elements have different effects on the properties of silicon steel. The effect of each element in the silicon steel is illustrated by cold-rolled non-oriented low-carbon low-silicon electrical steel. The silicon element is a main alloy element of the silicon steel, and can improve the resistivity of the silicon steel, thereby reducing the iron loss, and the silicon content of the low-silicon steel is generally between 0.3 percent and 1.2 percent. Manganese element in the silicon steel can be combined with sulfur element to generate MnS, hot rolling plasticity of the silicon steel is improved, meanwhile, grain growth is promoted, magnetic performance is improved, and manganese element content of the low-silicon steel is generally 0.2% -0.6%. The phosphorus element can improve the resistivity of the silicon steel, promote the growth of crystal grains, improve the punching property and lighten the magnetic aging, but the excessive phosphorus also can cause the poor processing performance, and the phosphorus element of the low-silicon steel is generally controlled to be about 0.02 percent. Carbon is a deleterious element, and an increase in carbon content results in an increase in core loss and also causes magnetic aging, so the finished carbon content is typically less than 0.003%. The sulfur element is a harmful element, the sulfur content is improved, the iron loss is obviously increased, the hot brittleness is also increased, and the sulfur content of the low-silicon steel is generally less than 0.01 percent. The aluminum element has similar effects with the silicon element, and can improve the resistivity and promote the growth of crystal grains, thereby reducing the iron loss. However, acid-soluble aluminum increases, that is, alN increases, resulting in an increase in iron loss. The content of the aluminum element is generally controlled to be in the range of 0.01% -0.03%. Titanium, vanadium and niobium are all harmful elements, can form various inclusions, refine grains and improve iron loss, and generally should be controlled below 0.008%. The chromium element can improve the resistivity and the mechanical property, and the chromium with a certain content can improve the bottom layer quality during decarburization annealing. However, excessive chromium also hinders decarburization annealing. Copper element can improve magnetic properties but causes poor surface conditions of silicon steel. The calcium element can be added to form calcium sulfide in the silicon steel, promote precipitation of manganese sulfide and increase growth of manganese sulfide grains.
The general smelting process of silicon steel mainly comprises molten iron desulfurization, converter steelmaking, vacuum treatment and continuous casting blank formation. Among them, the most commonly used vacuum treatment is RH vacuum treatment. After decarburization and deoxidation of the molten steel in the RH furnace are completed, aluminum, ferrosilicon, ferrophosphorus and manganese metal are added in sequence in the conventional method. In order to prevent the alloy from polluting molten steel, high-purity ferrosilicon and high-purity manganese metal are added. The mass ratio of silicon and manganese added at this time is generally 1.5 to 2.2 according to production practice. The ferrosilicon and manganese metal are added into molten steel to generate melting heat, so that the molten steel is often overheated, and at the moment, a chill is added to cool so as to meet the temperature requirement of continuous casting. In addition, the mode of adding ferrosilicon and manganese metal respectively also increases the configuration and operation complexity of the high-level bin of the RH furnace. If the high-purity ferrosilicon and the metal manganese are premelted into the high-purity ferrosilicon alloy with a certain component according to a certain proportion, the influence of melting heat and the operation difficulty are effectively reduced, the RH smelting time is shortened, and the production efficiency of the silicon steel is improved. The silicon-manganese ratio of the silicon-manganese alloy applied in the industry at present is generally between 0.2 and 0.5, and the impurity content of the silicon-manganese alloy cannot meet the requirement of silicon steel smelting, so that the high-purity silicon-manganese alloy required by RH vacuum treatment of the silicon steel is not met at present.
The traditional silicon-manganese alloy is smelted in an ore smelting furnace, and the silicon content is generally 10-30%. When it is desired to increase the silicon content of the silicomanganese alloy, the amount of silica and coke must be increased. When the carbon distribution amount in the furnace charge is large, the resistivity of the furnace charge is reduced, the conductivity is enhanced, the current of an ammeter is increased, a coke lifting layer on an electrode is thickened, the position of the coke layer moves upwards, a furnace molten pool is reduced, the phenomena of fire piercing and material collapsing are increased, if the phenomena continue, the high-temperature area moves upwards due to insufficient insertion depth of the electrode, the temperature of a furnace mouth is increased, the lifting of the electrode is serious, the material collapsing in the furnace is increased, the temperature of the furnace bottom is reduced, silicon dioxide is not fully reduced, the silicon content in an alloy is reduced, meanwhile, tapping and slag discharging are not smooth, and the phenomena of furnace gas pressure rising and instability can occur for a closed furnace.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention provides a high-purity silicon-manganese alloy for silicon steel and a preparation method thereof. The high-purity silicon-manganese alloy for the silicon steel is a high-purity multi-element iron alloy, and comprises the following components in percentage by weight: 50-60% of silicon, 25-35% of manganese and the balance of iron and unavoidable impurities; when the alloy is used for smelting silicon steel, the silicon and manganese contents in molten steel can be synchronously improved, the smelting time is shortened, the temperature rise of the molten steel is reduced, and the use amount of chill is reduced, so that the production cost of the silicon steel is reduced, and the production efficiency of the silicon steel is improved.
The high-purity silicon-manganese alloy for silicon steel comprises the following components in percentage by weight: 50 to 60 percent of silicon, 25 to 35 percent of manganese, less than or equal to 0.01 percent of niobium, less than or equal to 0.01 percent of vanadium, less than or equal to 0.01 percent of titanium, less than or equal to 0.012 percent of carbon, less than or equal to 0.02 percent of phosphorus, less than or equal to 0.01 percent of sulfur, less than or equal to 0.05 percent of calcium, less than or equal to 0.03 percent of aluminum, less than or equal to 0.05 percent of chromium, less than or equal to 0.1 percent of copper, and the balance of iron.
Further, the high-purity silicon-manganese alloy for silicon steel comprises the following components in percentage by weight: 54-56% of silicon, 27-28% of manganese and less than or equal to 0.01% of niobium; vanadium is less than or equal to 0.01 percent; titanium is less than or equal to 0.01 percent; carbon is less than or equal to 0.012 percent; phosphorus is less than or equal to 0.02 percent; sulfur is less than or equal to 0.01 percent; calcium is less than or equal to 0.05 percent; aluminum is less than or equal to 0.03 percent; chromium is less than or equal to 0.05 percent; copper is less than or equal to 0.1 percent; the balance being iron.
Furthermore, the high-purity silicon-manganese alloy for silicon steel comprises the following components in percentage by weight: 54% -56% of silicon; 32% -33% of manganese; niobium is less than or equal to 0.01 percent; vanadium is less than or equal to 0.01 percent; titanium is less than or equal to 0.01 percent; carbon is less than or equal to 0.012 percent; phosphorus is less than or equal to 0.02 percent; sulfur is less than or equal to 0.01 percent; calcium is less than or equal to 0.05 percent; aluminum is less than or equal to 0.03 percent; chromium is less than or equal to 0.05 percent; copper is less than or equal to 0.1 percent; the balance being iron.
The high-purity ferrosilicon alloy for silicon steel is granular, and the grain diameter range is 1 mm-100 mm, and the preferable range is 10-50 mm.
The preparation method of the high-purity silicon-manganese alloy for silicon steel comprises the following specific steps:
(1) melting metal silicon or crystal silicon powder mixture in an intermediate frequency induction furnace, and controlling the melt temperature to be 1500-1700 ℃;
(2) pouring the melted silicon liquid into a ladle I filled with a metal manganese sheet and a metal iron sheet, and smelting the metal manganese sheet and the metal iron sheet by using melting heat;
(3) pouring the mixture of silicon liquid, manganese metal and iron metal in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) casting the alloy liquid in the ladle II into an alloy ingot;
(5) and cooling the alloy ingot, separating slag from gold, and finishing to obtain a finished product.
Wherein, metal silicon: metal manganese sheet: the mass ratio of the metal iron sheet is 50-60:25-35:25-5.
The crystalline silicon powder mixture is a mixture of crystalline silicon cutting powder and lime powder for photovoltaics; wherein, crystalline silicon cutting powder for photovoltaic: lime powder: metal manganese sheet: the mass ratio of the metal iron sheet is 60-80:3-7:25-35:25-5.
Preferably, the metal silicon is industrial pure silicon, and the silicon content is more than or equal to 99.5 percent.
The metal manganese sheet is an electrolytic metal manganese sheet, and Mn is more than or equal to 99.9 percent.
The metal iron sheet is a silicon steel sheet stamping trimming corner material, and comprises the following components in percentage by weight: silicon is less than or equal to 2 percent; niobium is less than or equal to 0.002%; vanadium less than or equal to 0.002%; titanium is less than or equal to 0.002%; carbon is less than or equal to 0.01 percent; phosphorus is less than or equal to 0.005%; sulfur is less than or equal to 0.03%; calcium is less than or equal to 0.05 percent; aluminum is less than or equal to 0.1 percent; chromium is less than or equal to 0.05 percent; copper is less than or equal to 0.1 percent; the balance being iron.
The crystalline silicon cutting powder for the photovoltaic comprises the following components in percentage by weight: metal silicon is more than or equal to 78%; silica is less than or equal to 20 percent; niobium is less than or equal to 0.015 percent; vanadium is less than or equal to 0.015%; titanium is less than or equal to 0.02 percent; carbon is less than or equal to 2 percent; phosphorus is less than or equal to 0.02 percent; sulfur is less than or equal to 0.01 percent; calcium is less than or equal to 0.05 percent; aluminum is less than or equal to 0.2 percent; chromium is less than or equal to 0.05 percent; copper is less than or equal to 0.1 percent; iron is less than or equal to 0.5 percent, and water is less than or equal to 1 percent;
the lime powder component used must reach more than one level of ordinary metallurgical lime specified by YB/T042-2014.
The intermediate frequency induction furnace adopts a graphite crucible as a furnace lining, and corundum refractory materials are adopted between the graphite crucible and the induction coil.
When metal silicon is used for smelting, controlling the temperature of a melt to be 1500-1600 ℃; when the photovoltaic crystalline silicon cutting powder is used for smelting, the temperature of the melt is controlled to be 1600-1700 ℃.
The components of the novel high-purity silicon-manganese alloy provided by the invention can meet the requirements of a silicon steel RH vacuum treatment process, especially the silicon-manganese ratio range can adapt to the smelting requirements of most silicon steel, and the impurity content meets the requirements of the silicon steel. In silicon steel smelting, silicon and manganese are added simultaneously in one operation, so that the configuration of a high-level bin of an RH furnace is reduced, the feeding operation is reduced, and the steelmaking efficiency is improved; the temperature rise after molten steel is put into is obviously lower than the temperature rise generated after high-purity ferrosilicon and manganese are respectively put into molten steel, so that the addition amount of chill is reduced or even cancelled, and the cost and the operation complexity are reduced.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention discloses a preparation method of a novel high-purity silicon-manganese alloy, which is characterized in that molten liquid silicon is mixed into metal manganese and metal iron at room temperature, the metal manganese and the metal iron are fully melted by utilizing metal melting heat, and the high-purity silicon-manganese alloy is formed.
2. The novel preparation method of the high-purity silicon-manganese alloy disclosed by the invention utilizes the crystalline silicon cutting powder for photovoltaics and the slag former to smelt and obtain high-purity silicon, thereby meeting the requirement of high-purity silicon-manganese on impurity content and reducing the production cost. Meanwhile, the silicon steel raw material component is consistent with the requirement of the high-purity silicon manganese component, the silicon steel sheet is used for stamping and trimming the corner material to produce the high-purity silicon manganese alloy, so that the introduction of new impurity components is avoided, the recycling of scrap steel is increased, and the production cost is further reduced.
Detailed Description
The raw materials used in the following examples are as follows:
the industrial pure silicon comprises the following components in percentage by weight: 99.84% of silicon; niobium 0.001%; vanadium 0.001%; titanium 0.003%; carbon 0.01%; 0.005% of phosphorus; sulfur 0.005%; 0.005% of calcium; 0.06% of aluminum; chromium 0.002%; copper 0.001%; manganese 0.002%; iron 0.06%.
The crystalline silicon cutting powder for the photovoltaic comprises the following components in percentage by weight: 80.1% of metal silicon; 18% of silicon dioxide; niobium 0.005%; vanadium 0.004%; titanium 0.017%; 0.5% of carbon; phosphorus 0.002%; sulfur 0.001%; 0.02% of calcium; 0.15% of aluminum; chromium 0.005%; copper 0.01%; iron 0.05%; moisture 0.9%.
Lime powder is more than one grade of common metallurgical lime specified by YB/T042-2014 and CaO is 92 percent.
The electrolytic manganese metal sheet comprises the following components in percentage by weight: 99.91% of manganese; niobium 0.001%; vanadium 0.001%; titanium 0.001%; carbon 0.01%; phosphorus 0.001%; sulfur 0.03%; 0.001% of calcium; 0.01% of aluminum; chromium 0.01%; copper 0.01%; iron 0.005%.
The silicon steel sheet stamping trimming corner material comprises the following components in percentage by weight: iron 97.56%; silicon 1.35%; niobium 0.001%; vanadium 0.002%; titanium 0.001%; carbon 0.01%; phosphorus 0.007%; sulfur 0.003%; 0.01% of calcium; 0.4% of aluminum; chromium 0.002%; copper 0.001%.
Example 1
The preparation method of the high-purity silicon-manganese alloy for the silicon steel adopts industrial pure silicon to prepare the silicon-manganese alloy, and comprises the following steps:
(1) melting 550kg of industrial pure silicon in an intermediate frequency induction furnace with a knotted graphite crucible, and continuously heating the melted silicon to control the temperature of the melt to 1550 ℃;
(2) pouring molten silicon liquid into a ladle I filled with 270kg of electrolytic manganese metal sheets and 180kg of silicon steel sheet stamping and cutting scraps, wherein the molten silicon liquid, the manganese metal and the silicon steel sheet undergo a dissolution exothermic reaction;
(3) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) casting the alloy melt in the ladle II into an alloy ingot;
(5) and cooling the alloy ingot, separating slag from gold, and finishing to obtain a finished product.
992kg of alloy and 4kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 55.29% of silicon; 27.02% of manganese; 17.55% of iron; niobium 0.001%; vanadium 0.001%; titanium 0.002%; carbon 0.005%; phosphorus 0.004%; sulfur 0.008%; 0.004% of calcium; 0.02% of aluminum; chromium 0.004%; copper 0.003%.
Example 2
The preparation method of the high-purity silicon-manganese alloy for the silicon steel adopts industrial pure silicon to prepare the silicon-manganese alloy, and comprises the following steps:
(1) melting 500kg of industrial pure silicon in an intermediate frequency induction furnace with a knotted graphite crucible, and continuously heating to control the temperature of the melt to 1570 ℃ after melting;
(2) pouring the melted silicon liquid into a ladle I filled with 300kg of electrolytic manganese metal sheets and 200kg of silicon steel sheet stamping and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the manganese metal and the silicon steel sheet;
(3) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) casting the alloy melt in the ladle II into an alloy ingot;
(5) and cooling the alloy ingot, separating slag from gold, and finishing to obtain a finished product.
993kg of alloy and 3kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: silicon 50.50%; 29.81% of manganese; iron 19.32%; niobium 0.002%; vanadium 0.001%; titanium 0.001%; carbon 0.004%; phosphorus 0.003%; sulfur 0.006%; 0.005% of calcium; 0.01% of aluminum; chromium 0.006%; copper 0.005%.
Example 3
The preparation method of the high-purity silicon-manganese alloy for the silicon steel adopts industrial pure silicon to prepare the silicon-manganese alloy, and comprises the following steps:
(1) melting 500kg of industrial pure silicon in an intermediate frequency induction furnace with a knotted graphite crucible, and continuously heating to control the temperature of the melt to 1570 ℃ after melting;
(2) pouring molten silicon liquid into a ladle I filled with 252kg of electrolytic manganese metal sheets and 250kg of silicon steel sheet stamping and cutting scraps, wherein the molten silicon liquid, the manganese metal and the silicon steel sheets undergo a dissolution exothermic reaction;
(3) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) casting the alloy melt in the ladle II into an alloy ingot;
(5) and cooling the alloy ingot, separating slag from gold, and finishing to obtain a finished product.
993kg of alloy and 3kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: silicon 50.23%; 25.20% of manganese; 24.40% of iron; niobium 0.001%; vanadium 0.001%; titanium 0.001%; carbon 0.005%; phosphorus 0.002%; sulfur 0.005%; 0.004% of calcium; 0.013% of aluminum; chromium 0.005%; copper 0.006%.
Example 4
The preparation method of the high-purity silicon-manganese alloy for the silicon steel adopts industrial pure silicon to prepare the silicon-manganese alloy, and comprises the following steps:
(1) melting 500kg of industrial pure silicon in an intermediate frequency induction furnace with a knotted graphite crucible, and continuously heating to control the temperature of the melt to 1570 ℃ after melting;
(2) pouring molten silicon liquid into a ladle I filled with 353kg of electrolytic manganese metal sheets and 150kg of silicon steel sheet stamping and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the manganese metal and the silicon steel sheets;
(3) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) casting the alloy melt in the ladle II into an alloy ingot;
(5) and cooling the alloy ingot, separating slag from gold, and finishing to obtain a finished product.
The present example obtained 990kg of alloy, 5kg of slag, wherein the composition and weight percentage of each component of the high purity silicon manganese alloy were: 50.09% of silicon; 35.00% of manganese; 14.70% of iron; niobium 0.002%; vanadium 0.002%; titanium 0.001%; carbon 0.005%; phosphorus 0.003%; sulfur 0.006%; 0.004% of calcium; 0.013% of aluminum; chromium 0.005%; copper 0.004%.
Example 5
The preparation method of the high-purity silicon-manganese alloy for the silicon steel adopts industrial pure silicon to prepare the silicon-manganese alloy, and comprises the following steps:
(1) melting 600kg of industrial pure silicon in an intermediate frequency induction furnace with a knotted graphite crucible, and continuously heating after melting, wherein the temperature of the melt is controlled to be 1530 ℃;
(2) pouring molten silicon liquid into a ladle I filled with 255kg of electrolytic manganese metal sheets and 150kg of silicon steel sheet stamping and cutting scraps, wherein the molten silicon liquid, the manganese metal and the silicon steel sheet undergo a dissolution exothermic reaction;
(3) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) casting the alloy melt in the ladle II into an alloy ingot;
(5) and cooling the alloy ingot, separating slag from gold, and finishing to obtain a finished product.
996kg of alloy and 5kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 59.9% of silicon; 25.3% of manganese; 14.6% of iron; niobium 0.002%; vanadium 0.003%; titanium 0.002%; carbon 0.003%; phosphorus 0.002%; sulfur 0.005%; calcium 0.006%; 0.02% of aluminum; chromium 0.005%; copper 0.008%.
Example 6
The preparation method of the high-purity silicon-manganese alloy for the silicon steel adopts industrial pure silicon to prepare the silicon-manganese alloy, and comprises the following steps:
(1) melting 600kg of industrial pure silicon in an intermediate frequency induction furnace with a knotted graphite crucible, and continuously heating after melting, wherein the temperature of the melt is controlled to be 1530 ℃;
(2) pouring molten silicon liquid into a ladle I filled with 350kg of electrolytic manganese metal sheets and 51kg of silicon steel sheet stamping and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the manganese metal and the silicon steel sheets;
(3) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) casting the alloy melt in the ladle II into an alloy ingot;
(5) and cooling the alloy ingot, separating slag from gold, and finishing to obtain a finished product.
997kg of alloy and 3kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 60.0% of silicon; 34.9% of manganese; iron 5.0%; niobium 0.001%; vanadium 0.002%; titanium 0.001%; carbon 0.003%; phosphorus 0.001%; sulfur 0.004%; 0.005% of calcium; 0.02% of aluminum; chromium 0.004%; copper 0.004%.
Example 7
The preparation method of the high-purity silicon-manganese alloy for silicon steel adopts crystalline silicon cutting powder for photovoltaic to prepare the silicon-manganese alloy, and comprises the following steps:
(1) mixing 500kg of crystalline silicon cutting powder for photovoltaic and 40kg of metallurgical lime powder uniformly;
(2) adding the mixed powder in the step (1) into a medium frequency induction furnace knotted by a graphite crucible for melting, and continuously heating after melting, wherein the temperature of the melt is controlled to be 1650 ℃;
(3) pouring the melt in the step (2) into a ladle I filled with 190kg of electrolytic metal manganese sheets and 125kg of silicon steel sheets, punching and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the metal manganese and the silicon steel sheets;
(4) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(5) pouring the melt in the ladle II into a steel mould;
(6) and (5) separating slag and gold after cooling the melt, and finishing to obtain a high-purity silicon-manganese alloy finished product.
700kg of alloy and 151kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 55.61% of silicon; manganese 26.89%; 17.44% of iron; niobium 0.002%; vanadium 0.003%; titanium 0.008%; carbon 0.011%; phosphorus 0.003%; sulfur 0.008%; 0.015% of calcium; 0.020% of aluminum; chromium 0.006%; copper 0.01%.
Example 8
The preparation method of the high-purity silicon-manganese alloy for silicon steel adopts crystalline silicon cutting powder for photovoltaic to prepare the silicon-manganese alloy, and comprises the following steps:
(1) mixing 540kg of crystalline silicon cutting powder for photovoltaic and 28kg of metallurgical lime powder uniformly;
(2) adding the mixed powder in the step (1) into a medium frequency induction furnace knotted by a graphite crucible for melting, and continuously heating after melting, wherein the temperature of the melt is controlled to be 1650 ℃;
(3) pouring the melt in the step (2) into a ladle I filled with 180kg of electrolytic metal manganese sheets and 100kg of silicon steel sheets, punching and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the metal manganese and the silicon steel sheets;
(4) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(5) pouring the melt in the ladle II into a steel mould;
(6) and (5) separating slag and gold after cooling the melt, and finishing to obtain a high-purity silicon-manganese alloy finished product.
695kg of alloy and 147kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 60.00% of silicon; 25.25% of manganese; 14.55% of iron; niobium 0.003%; vanadium 0.002%; titanium 0.007%; carbon 0.010%; 0.005% of phosphorus; sulfur 0.006%; 0.012% of calcium; 0.015% of aluminum; chromium 0.005%; copper 0.007%.
Example 9
The preparation method of the high-purity silicon-manganese alloy for silicon steel adopts crystalline silicon cutting powder for photovoltaic to prepare the silicon-manganese alloy, and comprises the following steps:
(1) mixing 500kg of crystalline silicon cutting powder for photovoltaic and 40kg of metallurgical lime powder uniformly;
(2) adding the mixed powder in the step (1) into a medium frequency induction furnace knotted by a graphite crucible for melting, and continuously heating after melting, wherein the temperature of the melt is controlled to be 1650 ℃;
(3) pouring the melt in the step (2) into a ladle I filled with 195kg of electrolytic metal manganese sheets and 195kg of silicon steel sheets, punching and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the metal manganese and the silicon steel sheets;
(4) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(5) pouring the melt in the ladle II into a steel mould;
(6) and (5) separating slag and gold after cooling the melt, and finishing to obtain a high-purity silicon-manganese alloy finished product.
771kg of alloy and 152kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 50.37% of silicon; 25.05% of manganese; 24.33% of iron; niobium 0.001%; vanadium 0.002%; titanium 0.003%; carbon 0.009%; phosphorus 0.003%; sulfur 0.006%; calcium 0.014%; 0.013% of aluminum; chromium 0.003%; copper 0.005%.
Example 10
The preparation method of the high-purity silicon-manganese alloy for silicon steel adopts crystalline silicon cutting powder for photovoltaic to prepare the silicon-manganese alloy, and comprises the following steps:
(1) uniformly mixing 590kg of crystalline silicon cutting powder for photovoltaic and 60kg of metallurgical lime powder;
(2) adding the mixed powder in the step (1) into a medium frequency induction furnace knotted by a graphite crucible for melting, and continuously heating after melting, so as to control the temperature of the melt to 1600 ℃;
(3) pouring the melt in the step (2) into a ladle I filled with 270kg of electrolytic metal manganese sheets and 40kg of silicon steel sheets, punching and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the metal manganese and the silicon steel sheets;
(4) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(5) pouring the melt in the ladle II into a steel mould;
(6) and (5) separating slag and gold after cooling the melt, and finishing to obtain a high-purity silicon-manganese alloy finished product.
765kg of alloy and 191kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 59.77% of silicon; 34.82% of manganese; iron 5.01%; niobium 0.002%; vanadium 0.001%; titanium 0.002%; carbon 0.008%; phosphorus 0.002%; sulfur 0.005%; 0.012% of calcium; 0.015% of aluminum; chromium 0.002%; copper 0.004%.
Example 11
The preparation method of the high-purity silicon-manganese alloy for silicon steel adopts crystalline silicon cutting powder for photovoltaic to prepare the silicon-manganese alloy, and comprises the following steps:
(1) uniformly mixing 560kg of crystalline silicon cutting powder for photovoltaic and 56kg of metallurgical lime powder;
(2) adding the mixed powder in the step (1) into a medium frequency induction furnace knotted by a graphite crucible for melting, and continuously heating after melting, wherein the temperature of the melt is controlled to 1620 ℃;
(3) pouring the melt in the step (2) into a ladle I filled with 300kg of electrolytic metal manganese sheets and 140kg of silicon steel sheets, punching and cutting scraps, and carrying out a dissolution exothermic reaction on the silicon liquid, the metal manganese and the silicon steel sheets;
(4) pouring the melt in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(5) pouring the melt in the ladle II into a steel mould;
(6) and (5) separating slag and gold after cooling the melt, and finishing to obtain a high-purity silicon-manganese alloy finished product.
868kg of alloy and 182kg of slag are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 50.05% of silicon; 34.15% of manganese; 15.51% of iron; niobium 0.001%; vanadium 0.001%; titanium 0.001%; carbon 0.010%; phosphorus 0.001%; sulfur 0.006%; 0.012% of calcium; 0.018% aluminum; chromium 0.001%; copper 0.005%.
Comparative example 1
The preparation method of the high-purity silicon-manganese alloy for silicon steel adopts crystalline silicon cutting powder for photovoltaic to prepare the silicon-manganese alloy, and comprises the following steps:
(1) mixing 500kg of crystalline silicon cutting powder for photovoltaic and 40kg of metallurgical lime powder uniformly;
(2) adding the mixture obtained in the step (1) into a medium-frequency induction furnace knotted by a graphite crucible for melting, and adding 195kg of electrolytic metal manganese sheets and 195kg of silicon steel sheets for punching and trimming edges and corners after melting; controlling the temperature of the melt to 1650 ℃;
(3) pouring the melt in the medium frequency induction furnace into a steel mould;
(4) and (5) separating slag and gold after cooling the melt, and finishing to obtain a high-purity silicon-manganese alloy finished product.
The alloy 651kg and the slag 251kg are obtained in the embodiment, wherein the high-purity silicon-manganese alloy comprises the following components in percentage by weight: 45.37% of silicon; 22.05% of manganese; iron 22.33%; niobium 0.001%; vanadium 0.002%; titanium 0.003%; carbon 0.009%; phosphorus 0.003%; sulfur 0.006%; calcium 0.014%; 0.013% of aluminum; chromium 0.003%; copper 0.005%.
Claims (9)
1. The high-purity silicon-manganese alloy for the silicon steel is characterized by comprising the following components in percentage by weight: 50 to 60 percent of silicon, 25 to 35 percent of manganese, less than or equal to 0.01 percent of niobium, less than or equal to 0.01 percent of vanadium, less than or equal to 0.01 percent of titanium, less than or equal to 0.012 percent of carbon, less than or equal to 0.02 percent of phosphorus, less than or equal to 0.01 percent of sulfur, less than or equal to 0.05 percent of calcium, less than or equal to 0.03 percent of aluminum, less than or equal to 0.05 percent of chromium, less than or equal to 0.1 percent of copper, and the balance of iron.
2. The high purity silicon-manganese alloy for silicon steel according to claim 1, wherein the high purity silicon-manganese-iron alloy for silicon steel is in the form of particles having a particle diameter in the range of 1mm to 100mm.
3. A method for preparing the high purity silicon-manganese alloy for silicon steel according to claim 1 or 2, comprising the following specific steps:
(1) Melting metal silicon or crystal silicon powder mixture in an intermediate frequency induction furnace, and controlling the melt temperature to be 1500-1700 ℃;
(2) Pouring the melted silicon liquid into a ladle I filled with a metal manganese sheet and a metal iron sheet, and smelting the metal manganese sheet and the metal iron sheet by using melting heat;
(3) Pouring the mixture of silicon liquid, manganese metal and iron metal in the ladle I into the ladle II, and further enabling the components of the melt to be uniform;
(4) Casting the alloy liquid in the ladle II into an alloy ingot; and after the alloy ingot is cooled, separating slag from gold, and finishing to obtain the high-purity silicon-manganese alloy for silicon steel.
4. The method for producing a high purity silicon-manganese alloy for silicon steel according to claim 3, wherein the metal silicon: metal manganese sheet: the mass ratio of the metal iron sheet is 50-60:25-35:25-5.
5. The method for producing a high purity silicon-manganese alloy for silicon steel according to claim 3, wherein the crystalline silicon powder mixture is a mixture of crystalline silicon cutting powder for photovoltaic use and lime powder; the crystalline silicon cutting powder for the photovoltaic comprises the following components: lime powder: metal manganese sheet: the mass ratio of the metal iron sheet is 60-80:3-7:25-35:25-5.
6. The method for preparing high purity silicon-manganese alloy for silicon steel according to claim 3, wherein the intermediate frequency induction furnace adopts a graphite crucible as a furnace lining, and corundum refractory material is adopted between the graphite crucible and the induction coil.
7. The method for producing a high purity silicon-manganese alloy for silicon steel according to claim 3, wherein the metal silicon is industrially pure silicon having a silicon content of 99.5% or more; the metal manganese sheet is an electrolytic metal manganese sheet, and Mn is more than or equal to 99.9%; the metal iron sheet is a silicon steel sheet stamping trimming corner material.
8. The method for preparing high purity silicon-manganese alloy for silicon steel according to claim 3, wherein the components of the crystalline silicon cutting powder for photovoltaic use are as follows by weight percent: metal silicon is more than or equal to 78%; silica is less than or equal to 20 percent; niobium is less than or equal to 0.015 percent; vanadium is less than or equal to 0.015%; titanium is less than or equal to 0.02 percent; carbon is less than or equal to 2 percent; phosphorus is less than or equal to 0.02 percent; sulfur is less than or equal to 0.01 percent; calcium is less than or equal to 0.05 percent; aluminum is less than or equal to 0.2 percent; chromium is less than or equal to 0.05 percent; copper is less than or equal to 0.1 percent; iron is less than or equal to 0.5 percent, and water is less than or equal to 1 percent.
9. The method for preparing high purity silicon-manganese alloy for silicon steel according to claim 3, wherein the lime powder component must reach more than one level of ordinary metallurgical lime specified by YB/T042-2014.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023112298434 | 2023-09-22 | ||
| CN202311229843 | 2023-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117265370A true CN117265370A (en) | 2023-12-22 |
Family
ID=89210062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311257002.4A Pending CN117265370A (en) | 2023-09-22 | 2023-09-27 | High-purity silicon-manganese alloy for silicon steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117265370A (en) |
-
2023
- 2023-09-27 CN CN202311257002.4A patent/CN117265370A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102260822B (en) | Smelting method of high-phosphorus low-sulfur non-oriented electrical steel | |
| CN102758144B (en) | Production method for steel ingot of large-sized high-nitrogen retaining ring steel | |
| CN108396097B (en) | Smelting method of low-Ca and low-Al welding wire steel | |
| CN106086608B (en) | A kind of method that low-carbon manganese-silicon is produced using carbon manganese slag | |
| CN103627971B (en) | Large gauge drilling tool structural alloy steel and smelting process thereof | |
| WO2017054299A1 (en) | Triplex stainless steel manufacturing process via rkef-based ferronickel and ferrochrome production and aod furnace | |
| CN111979473B (en) | Preparation method of high-purity ferrophosphorus | |
| CN113774277B (en) | Ultra-low carbon and ultra-low manganese industrial pure iron and preparation method thereof | |
| CN109777918A (en) | A kind of external refining production method refining high-carbon-chromium bearing steel inclusion particle | |
| CN101220413A (en) | Technique for smelting ferroferrite with sponge iron | |
| CN103526066A (en) | Continuous process for producing manganese-silicon alloy and slag rich in silicomanganese and producing micro-and low-carbon manganese-silicon alloy by utilization of slag rich in silicomanganese | |
| CN113943145A (en) | Unburned magnesia carbon brick and preparation method and application thereof | |
| CN111187971B (en) | Low-titanium-phosphorus-iron alloy and preparation method thereof | |
| CN101323898B (en) | Oxygen one-step impurity removing refining method for raw ferro nickel | |
| CN107619899A (en) | A kind of production method and Steel material of low remaining chromium content molten steel | |
| CN103643094A (en) | Smelting method of high-carbon ferromanganese | |
| CN110699595A (en) | Hot rolling process for reinforcing steel bar | |
| CN102839292A (en) | Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy | |
| CN117265370A (en) | High-purity silicon-manganese alloy for silicon steel and preparation method thereof | |
| CN114686784A (en) | Nickel-saving austenitic stainless steel material and preparation method thereof | |
| CN109972062B (en) | High-purity large electroslag ingot and production method thereof | |
| JP2003286533A (en) | Processes for producing highly pure ferroboron, mother alloy for iron-based amorphous alloy and iron-based amorphous alloy | |
| CN113718104A (en) | Preparation process of low-oxygen high-titanium-iron alloy | |
| CN112375961A (en) | Method for producing high-purity industrial pure iron by adopting intermediate frequency furnace duplex method | |
| CN100355912C (en) | Silicon-calcium-barium ferroalloy in use for steel making |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |