CN110777293A - Low-silicon low-titanium high-carbon ferrochromium and preparation method thereof - Google Patents
Low-silicon low-titanium high-carbon ferrochromium and preparation method thereof Download PDFInfo
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- 229910000604 Ferrochrome Inorganic materials 0.000 title claims abstract description 66
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 32
- 239000010936 titanium Substances 0.000 title claims abstract description 26
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 26
- 239000010703 silicon Substances 0.000 title claims abstract description 20
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims description 11
- 239000011651 chromium Substances 0.000 claims abstract description 32
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 19
- 239000000956 alloy Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000571 coke Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052796 boron Inorganic materials 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 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 abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000011733 molybdenum Substances 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000007670 refining Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000006104 solid solution Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- 238000003723 Smelting Methods 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 description 15
- 229910001220 stainless steel Inorganic materials 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- DYRBFMPPJATHRF-UHFFFAOYSA-N chromium silicon Chemical compound [Si].[Cr] DYRBFMPPJATHRF-UHFFFAOYSA-N 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 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
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
- C22C1/1052—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites by mixing and casting metal matrix composites with reaction
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A low-silicon low-titanium high-carbon ferrochrome alloy comprises the following components in percentage by weight: c: 4.0-10.0%; cr: 55.0-65.0%; si: 0.1-0.3%; mn: 0.20-0.30%; mo: 0.40-0.80%; b: 0.6-1.2%; ni: 0.10-0.30%; ti: 0.01-0.03%; al: 0.04-0.12%; s: 0.05-0.10%; p: 0.01-0.03%; cu: 0.10-0.30%; the balance being Fe and unavoidable impurities. Mixing and melting chromium ore powder, iron ore powder, coke and silica to obtain ferrochrome alloy liquid, adding manganese, molybdenum, boron, nickel, titanium, aluminum and copper to the ferrochrome alloy liquid for melting, and adding a reducing agent, a reducing assistant and a binder to the alloy liquid to obtain the ferrochrome alloy. The method produces qualified products by directly smelting raw materials.
Description
Technical Field
The invention belongs to the technical field of ferrochrome, and particularly relates to a low-silicon low-titanium high-carbon ferrochrome and a preparation method thereof.
Background
Ferrochrome is the most important raw material for producing stainless steel, and is mainly applied to producing stainless steel, ball bearing steel, tool steel, nitriding steel, hot strength steel, quenched and tempered steel, carburizing steel and hydrogen-resistant steel, because chromium plays a determining role in stainless steel, only one element determining the attribute of the stainless steel is chromium, and each stainless steel must contain a certain amount of chromium. The corrosion resistance of stainless steel is mainly derived from chromium. Experiments prove that the corrosion resistance of the steel can be greatly improved only when the chromium content exceeds 12 percent, so that the chromium content in the stainless steel is generally not lower than 12 percent. The supply and demand of chromite is therefore closely related to that of the stainless steel market.
The high-carbon ferrochrome is mainly used for producing stainless steel, wherein the chromium content of 200 series stainless steel is about 16%, the chromium content of 300 series stainless steel is about 25%, and the chromium content of 400 series stainless steel is about 14%. The 300 series stainless steel with the largest ferrochrome requirement is also the largest proportion product in the stainless steel production. The alloy is used as an alloying agent for ball steel, tool steel and high-speed steel with high carbon content, the hardenability of the steel is improved, and the wear resistance and hardness of the steel are improved; the additive is used as an additive of cast iron, improves the wear resistance and hardness of the cast iron, and simultaneously ensures that the cast iron has good heat resistance; the chromium-containing raw material is used for producing silicon-chromium alloy and medium, low and micro carbon ferrochrome by a slag-free method; the chromium-containing raw material is used for producing metal chromium by an electrolytic method; used as a raw material for smelting stainless steel by an oxygen blowing method.
In the industries of ferrous metallurgy, casting and the like, high-carbon ferrochrome is widely applied as an important raw material and an additive, and with the development of market economy, steel enterprises have increasingly strict requirements on the components of the high-carbon ferrochrome alloy; in the raw materials for producing special bearing steel, special requirements are placed on the contents of titanium and silicon in the high-carbon ferrochrome alloy, and high-carbon ferrochrome products with the silicon content of less than 0.3% and the titanium content of less than 0.03% are increasingly demanded.
Disclosure of Invention
The invention aims to provide a low-silicon low-titanium high-carbon ferrochrome and a preparation method thereof.
The invention is realized by the following technical scheme:
a low-silicon low-titanium high-carbon ferrochrome alloy comprises the following components in percentage by weight: c: 4.0-10.0%; cr: 55.0-65.0%; si: 0.1-0.3%; mn: 0.20-0.30%; mo: 0.40-0.80%; b: 0.6-1.2%; ni: 0.10-0.30%; ti: 0.01-0.03%; al: 0.04-0.12%; s: 0.05-0.10%; p: 0.01-0.03%; cu: 0.10-0.30%; the balance being Fe and unavoidable impurities.
Preferably, the weight percentages of the components are as follows: c: 6.0 percent; cr: 60.0 percent; si: 0.2 percent; mn: 0.25 percent; mo: 0.60 percent; b: 0.9 percent; ni: 0.20 percent; ti: 0.02 percent; al: 0.08 percent; s: 0.07 percent; p: 0.02 percent; cu: 0.20 percent; the balance being Fe and unavoidable impurities.
A preparation method of a low-silicon low-titanium high-carbon ferrochromium alloy comprises the following steps:
(1) mixing chromium ore powder, iron ore powder, coke and silica as raw materials to obtain a mixed material; by mass, chromium ore powder Cr
2O
330-40% of coke, 10-50 mm of particle size, 80-90% of coke fixed carbon, 10-20 mm of particle size, and SiO 2
2The content is not less than 97 percent, and the granularity is 10-30 mm;
(2) the mixed material is firstly melted into ferrochrome liquid by a graphite crucible of 28349heating to 600-700 ℃, then manganese, molybdenum, boron, nickel, titanium, aluminum and copper are sequentially added into the ferrochrome liquid for melting, then the temperature is reduced to 580-620 ℃, and the mixture is uniformly stirred for 3-5 min;
(3) under the protection of argon, adding a reducing agent, a reducing assistant agent and a binder into the ferrochrome liquid, and stirring for 4-6min after completely melting;
(4) removing scum, adding a ferrochromium refining agent at 600-700 ℃ for refining, stirring for 20-30min, and then skimming and degassing;
(5) and after the components in front of the furnace are analyzed to be qualified, carrying out solid solution treatment and aging treatment on the refined ferrochrome liquid to obtain the ferrochrome.
Preferably, the chromium ore powder Cr in the step (1)
2O
335% of content, 30mm of particle size, 85% of coke fixed carbon content, 15mm of particle size, silica SiO
2The content is not less than 97 percent, and the granularity is 20 mm.
Preferably, the mass ratio of the reducing agent, the auxiliary reducing agent and the binder in the step (3) is 2: 3: 2.
compared with the prior art, the preparation process parameters of the invention can effectively improve the process performance of the ferrochrome alloy, improve the processing and heat treatment strength of the ferrochrome alloy, effectively ensure the casting performance and the mechanical performance, and effectively improve the strength, the toughness, the ductility and the wear resistance of the ferrochrome alloy.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A low-silicon low-titanium high-carbon ferrochrome alloy comprises the following components in percentage by weight: c: 4.0 percent; cr: 55.0 percent; si: 0.1 percent; mn: 0.20 percent; mo: 0.40 percent; b: 0.6 percent; ni: 0.10 percent; ti: 0.01 percent; al: 0.04 percent; s: 0.05 percent; p: 0.01 percent; cu: 0.10 percent; the balance being Fe and unavoidable impurities.
The preparation method of the low-silicon low-titanium high-carbon ferrochrome comprises the following steps:
(1) mixing chromium ore powder, iron ore powder, coke and silica as raw materials to obtain a mixed material; by mass, chromium ore powder Cr
2O
330-40% of coke, 10-50 mm of particle size, 80-90% of coke fixed carbon, 10-20 mm of particle size, and SiO 2
2The content is not less than 97 percent, and the granularity is 10-30 mm;
(2) the mixed material is firstly melted into ferrochrome liquid by a graphite crucible of 28349heating to 600-700 ℃, then manganese, molybdenum, boron, nickel, titanium, aluminum and copper are sequentially added into the ferrochrome liquid for melting, then the temperature is reduced to 580-620 ℃, and the mixture is uniformly stirred for 3-5 min;
(3) under the protection of argon, adding a reducing agent, a reducing assistant agent and a binder into the ferrochrome liquid, and stirring for 4-6min after completely melting; the mass ratio of the reducing agent to the auxiliary reducing agent to the binder is 2: 3: 2;
(4) removing scum, adding a ferrochromium refining agent at 600-700 ℃ for refining, stirring for 20-30min, and then skimming and degassing;
(5) and after the components in front of the furnace are analyzed to be qualified, carrying out solid solution treatment and aging treatment on the refined ferrochrome liquid to obtain the ferrochrome.
Example 2
A low-silicon low-titanium high-carbon ferrochrome alloy comprises the following components in percentage by weight: c: 6.0 percent; cr: 60.0 percent; si: 0.2 percent; mn: 0.25 percent; mo: 0.60 percent; b: 0.9 percent; ni: 0.20 percent; ti: 0.02 percent; al: 0.08 percent; s: 0.07 percent; p: 0.02 percent; cu: 0.20 percent; the balance being Fe and unavoidable impurities.
The preparation method of the low-silicon low-titanium high-carbon ferrochrome comprises the following steps:
(1) mixing chromium ore powder, iron ore powder, coke and silica as raw materials to obtain a mixed material; by mass, chromium ore powder Cr
2O
335% of content, 30mm of particle size, 85% of coke fixed carbon content, 15mm of particle size, silica SiO
2The content is not less than 97 percent, and the granularity is 20 mm;
(2) the mixed material is firstly melted into ferrochrome liquid by a graphite crucible of 28349heating to 600-700 ℃, then manganese, molybdenum, boron, nickel, titanium, aluminum and copper are sequentially added into the ferrochrome liquid for melting, then the temperature is reduced to 580-620 ℃, and the mixture is uniformly stirred for 3-5 min;
(3) under the protection of argon, adding a reducing agent, a reducing assistant agent and a binder into the ferrochrome liquid, and stirring for 4-6min after completely melting; the mass ratio of the reducing agent to the auxiliary reducing agent to the binder is 2: 3: 2;
(4) removing scum, adding a ferrochromium refining agent at 600-700 ℃ for refining, stirring for 20-30min, and then skimming and degassing;
(5) and after the components in front of the furnace are analyzed to be qualified, carrying out solid solution treatment and aging treatment on the refined ferrochrome liquid to obtain the ferrochrome.
Example 3
A low-silicon low-titanium high-carbon ferrochrome alloy comprises the following components in percentage by weight: c: 10.0 percent; cr: 65.0 percent; si: 0.3 percent; mn: 0.30 percent; mo: 0.80 percent; b: 1.2 percent; ni: 0.30 percent; ti: 0.03 percent; al: 0.12 percent; s: 0.10 percent; p: 0.03 percent; cu: 0.30 percent; the balance being Fe and unavoidable impurities.
The preparation method of the low-silicon low-titanium high-carbon ferrochrome comprises the following steps:
(1) mixing chromium ore powder, iron ore powder, coke and silica as raw materials to obtain a mixed material; by mass, chromium ore powder Cr
2O
330-40% of coke, 10-50 mm of particle size, 80-90% of coke fixed carbon, 10-20 mm of particle size, and SiO 2
2The content is not less than 97 percent, and the granularity is 10-30 mm;
(2) the mixed material is firstly melted into ferrochrome liquid by a graphite crucible of 28349heating to 600-700 ℃, then manganese, molybdenum, boron, nickel, titanium, aluminum and copper are sequentially added into the ferrochrome liquid for melting, then the temperature is reduced to 580-620 ℃, and the mixture is uniformly stirred for 3-5 min;
(3) under the protection of argon, adding a reducing agent, a reducing assistant agent and a binder into the ferrochrome liquid, and stirring for 4-6min after completely melting; the mass ratio of the reducing agent to the auxiliary reducing agent to the binder is 2: 3: 2;
(4) removing scum, adding a ferrochromium refining agent at 600-700 ℃ for refining, stirring for 20-30min, and then skimming and degassing;
(5) and after the components in front of the furnace are analyzed to be qualified, carrying out solid solution treatment and aging treatment on the refined ferrochrome liquid to obtain the ferrochrome.
The preparation process parameters of the embodiment can effectively improve the process performance of the ferrochrome, improve the processing and heat treatment strength of the ferrochrome, effectively ensure the casting performance and the mechanical performance, and effectively improve the strength, the toughness, the ductility and the wear resistance of the ferrochrome.
Claims (5)
1. The low-silicon low-titanium high-carbon ferrochrome is characterized by comprising the following components in percentage by weight: c: 4.0-10.0%; cr: 55.0-65.0%; si: 0.1-0.3%; mn: 0.20-0.30%; mo: 0.40-0.80%; b: 0.6-1.2%; ni: 0.10-0.30%; ti: 0.01-0.03%; al: 0.04-0.12%; s: 0.05-0.10%; p: 0.01-0.03%; cu: 0.10-0.30%; the balance being Fe and unavoidable impurities.
2. The low-silicon low-titanium high-carbon ferrochrome alloy as claimed in claim 1, wherein the weight percentages of the components are as follows: c: 6.0 percent; cr: 60.0 percent; si: 0.2 percent; mn: 0.25 percent; mo: 0.60 percent; b: 0.9 percent; ni: 0.20 percent; ti: 0.02 percent; al: 0.08 percent; s: 0.07 percent; p: 0.02 percent; cu: 0.20 percent; the balance being Fe and unavoidable impurities.
3. A preparation method of a low-silicon low-titanium high-carbon ferrochrome is characterized by comprising the following steps:
(1) mixing chromium ore powder, iron ore powder, coke and silica as raw materials to obtain a mixed material; by mass, chromium ore powder Cr
2O
330-40% of coke, 10-50 mm of particle size, 80-90% of coke fixed carbon, 10-20 mm of particle size, and SiO 2
2The content is not less than 97 percent, and the granularity is 10-30 mm;
(2) the mixed material is firstly melted into ferrochrome liquid by a graphite crucible of 28349heating to 600-700 ℃, then manganese, molybdenum, boron, nickel, titanium, aluminum and copper are sequentially added into the ferrochrome liquid for melting, then the temperature is reduced to 580-620 ℃, and the mixture is uniformly stirred for 3-5 min;
(3) under the protection of argon, adding a reducing agent, a reducing assistant agent and a binder into the ferrochrome liquid, and stirring for 4-6min after completely melting;
(4) removing scum, adding a ferrochromium refining agent at 600-700 ℃ for refining, stirring for 20-30min, and then skimming and degassing;
(5) and after the components in front of the furnace are analyzed to be qualified, carrying out solid solution treatment and aging treatment on the refined ferrochrome liquid to obtain the ferrochrome.
4. The method for preparing a low-silicon low-titanium high-carbon ferrochrome alloy according to claim 3, wherein the method comprises the following steps: in the step (1), the chromium mineral powder Cr
2O
335% of content, 30mm of particle size, 85% of coke fixed carbon content, 15mm of particle size, silica SiO
2The content is not less than 97 percent, and the granularity is 20 mm.
5. The method for preparing a low-silicon low-titanium high-carbon ferrochrome alloy according to claim 3, wherein the method comprises the following steps: the mass ratio of the reducing agent, the auxiliary reducing agent and the binder in the step (3) is 2: 3: 2.
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| CN113444950A (en) * | 2021-07-08 | 2021-09-28 | 烟台新钢联冶金科技有限公司 | Chromium-based high-nitrogen alloy cushion block for silicon steel high-temperature heating furnace and preparation method thereof |
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| CN105648304A (en) * | 2016-02-26 | 2016-06-08 | 铜陵安东铸钢有限责任公司 | Ferrochromium and preparation process thereof |
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| EP3497249A1 (en) * | 2016-07-11 | 2019-06-19 | Outotec (Finland) Oy | Process for manufacturing ferrochromium alloy with desired content of manganese, nickel and molybdenum |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962714A (en) * | 2010-10-25 | 2011-02-02 | 中钢集团吉林铁合金股份有限公司 | Production method of low-silicon low-titanium and high-carbon ferrochrome smelted by submerged arc furnace |
| CN105648304A (en) * | 2016-02-26 | 2016-06-08 | 铜陵安东铸钢有限责任公司 | Ferrochromium and preparation process thereof |
| EP3497249A1 (en) * | 2016-07-11 | 2019-06-19 | Outotec (Finland) Oy | Process for manufacturing ferrochromium alloy with desired content of manganese, nickel and molybdenum |
| CN108977678A (en) * | 2018-08-09 | 2018-12-11 | 徐州宏阳新材料科技有限公司 | A kind of low-Ti high-C ferrochronium and its smelting process |
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| CN113444950A (en) * | 2021-07-08 | 2021-09-28 | 烟台新钢联冶金科技有限公司 | Chromium-based high-nitrogen alloy cushion block for silicon steel high-temperature heating furnace and preparation method thereof |
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