CN115369268A - Production process for smelting manganese metal alloy by composite furnace lining of intermediate frequency furnace - Google Patents
Production process for smelting manganese metal alloy by composite furnace lining of intermediate frequency furnace Download PDFInfo
- Publication number
- CN115369268A CN115369268A CN202210931109.1A CN202210931109A CN115369268A CN 115369268 A CN115369268 A CN 115369268A CN 202210931109 A CN202210931109 A CN 202210931109A CN 115369268 A CN115369268 A CN 115369268A
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- China
- Prior art keywords
- furnace
- intermediate frequency
- smelting
- manganese metal
- frequency furnace
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000003723 Smelting Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229910001092 metal group alloy Inorganic materials 0.000 title claims abstract description 19
- 239000002131 composite material Substances 0.000 title claims abstract description 8
- 229910000640 Fe alloy Inorganic materials 0.000 claims abstract description 6
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000010959 steel Substances 0.000 description 18
- 239000011572 manganese Substances 0.000 description 11
- 229910052748 manganese Inorganic materials 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 230000006698 induction Effects 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 7
- 229910000914 Mn alloy Inorganic materials 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000009628 steelmaking Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 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 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000002411 adverse Effects 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
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910000859 α-Fe 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
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C22/00—Alloys based on manganese
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a production process for smelting manganese metal alloy by a composite furnace lining of an intermediate frequency furnace, which is characterized in that before the manganese metal alloy is smelted by the intermediate frequency furnace, aluminum-iron alloy in a 5-10 furnace is smelted, and Al with the thickness of 10-20mm is generated on the inner wall of the intermediate frequency furnace 2 O 3 Densifying the attachment shell, and then smelting the manganese metal alloy. The smelting time is prolonged to 18 days from the original 5 days, the furnace lining newly-repaired frequency is reduced, and the production efficiency of the intermediate frequency furnace is improved. The furnace life of the intermediate frequency furnace is improved to more than 350 furnaces from about 100 furnaces, and is improved by more than 250%. The cost of the manganese metal refractory is reduced to 25.7 yuan/ton, and the reduction amplitude reaches 71.4 percent.
Description
Technical Field
The invention relates to a production process for smelting manganese metal alloy by using a composite furnace lining of an intermediate frequency furnace.
Background
The metal manganese alloy is widely applied to steelmaking production because of good deoxidation effect and one of five conventional elements in steel chemical components, and has the main functions of deoxidation and desulfurization and is used as an alloy element.
(1) Deoxidizing agent: in the process of steelmaking, the increase of the oxygen content in the molten steel can have adverse effects on the mechanical properties of the steel, so that strict requirements on the oxygen content are required, generally not more than 0.02 percent, even tighter, and therefore, the excessive oxygen must be removed in the steelmaking process.
Manganese is an element with good activity, the chemical property of the manganese is more active than that of iron, and when the manganese metal is added into molten steel, the manganese metal can react with ferrous oxide to form oxide slag which is insoluble in the molten steel and floats on the liquid level of the molten steel, so that the oxygen content in the steel is reduced. Although the deoxidizing capacity of manganese in molten steel is lower than that of other elements (such as calcium, aluminum and silicon), manganese is widely applied due to the fact that manganese is easy to produce and low in price. At the same time, the deoxidation capability of silicon and aluminium is enhanced by the presence of manganese, since the deoxidation products and other oxides (such as Si 02) can form low melting compounds which facilitate removal from the molten steel.
(2) As a desulfurizing agent: sulfur exists in molten steel in the form of iron sulfide, and high sulfur content in steel easily causes hot brittleness, so that the rolling processing performance of the steel is reduced, and therefore, the content of sulfur needs to be controlled in the steel making process. The binding force of manganese and sulfur is greater than that of iron and sulfur, and after manganese alloy is added, sulfur in molten steel and manganese are easy to generate manganese sulfide with high melting point and transfer into slag, so that the sulfur content in steel is reduced, and the calendering processing of steel is improved.
(3) As alloying elements: manganese can be an important alloying element in various steels because it can strengthen ferrite and refine pearlite, and improve the strength, hardenability, hardness and wear resistance of the steel. For example, by adding 0.8% to 1.7% of Mn to low alloy steel, the strength of the steel can be improved by 20% to 30% as compared with ordinary carbon steel.
At present, the main production processes of the manganese metal alloy comprise an electrolytic remelting method and an electric silicothermic method, the smelter carries out smelting production by using an intermediate frequency furnace according to the existing production equipment conditions, and the electrolytic manganese sheet produced by the electrolytic remelting method is used as a main raw material.
The intermediate frequency furnace smelting production process has the advantages that: (1) high efficiency: the medium-frequency electric furnace can start heating and temperature rise by power supply, the temperature rise speed can reach 30 ℃/min, taking a 3t medium-frequency furnace as an example, the average smelting time of each furnace is about 45min. (2) component stabilization: the medium frequency furnace is used for producing the metal manganese, and after the proportion of metal furnace burden is determined, the components of the product are easy to control and stable. (3) Because the intermediate frequency furnace has the electromagnetic stirring function, the components of the manganese metal product produced by the intermediate frequency furnace are uniform.
The medium frequency furnace is a power supply device for converting power frequency 50Hz alternating current into medium frequency (more than 300Hz to 1000 Hz), the three-phase power frequency alternating current is converted into direct current after rectification, the direct current is converted into adjustable medium frequency current, the adjustable medium frequency current is supplied to medium frequency alternating current flowing through a capacitor and an induction coil, high-density magnetic lines are generated in the induction coil, metal materials contained in the induction coil are cut, great eddy current is generated in the metal materials, and the metal is heated by utilizing the electromagnetic induction principle to be melted into high-temperature liquid. The temperature of the metal material in the intermediate frequency furnace is generally 1400-1600 ℃ after being melted into liquid, so that a layer of furnace lining material is arranged between the high-temperature liquid and the induction coil, and circulating water is introduced into the induction coil for cooling, wherein the pressure of the circulating water is 0.2-0.25 MPa.
The manganese metal alloy has the following problems in the field practical production:
1. the production efficiency of the intermediate frequency furnace is low, because the temperature of the metal manganese alloy smelting furnace is more than 1500 ℃, high-temperature liquid can erode the furnace lining material, so that the furnace lining material becomes thinner gradually, when the furnace lining material is thin to a certain degree, the furnace is stopped, a new furnace lining is built again, taking the smelting of metal manganese in the intermediate frequency furnace of 3.0t as an example: and a furnace is stopped and a new furnace lining is built every 5 days of smelting, the time for building the new furnace lining every time is 24 hours, and the production efficiency is seriously influenced.
2. The service life of the smelting furnace of the intermediate frequency furnace is short, and the average service life is only about 100 furnaces.
3. The refractory material has higher cost, taking a 3.0t intermediate frequency furnace as an example: about 1.8 tons of refractory materials are needed for building a new furnace lining every time, and the cost of the metal manganese alloy is only about 90 yuan/ton.
4. After the furnace lining material is thin to a certain degree, if the furnace is not stopped in time, high-temperature metal liquid possibly flows out to be contacted with the induction coil, the induction coil of the intermediate frequency furnace is scalded through, and a furnace penetrating accident occurs.
Disclosure of Invention
The invention aims to provide a production process for smelting manganese metal alloy by using a composite furnace lining of an intermediate frequency furnace, which can effectively prolong the service life of the intermediate frequency furnace for smelting manganese metal and improve the working efficiency of the intermediate frequency furnace.
The invention adopts the technical scheme that the production process for smelting the manganese metal alloy by using the composite furnace lining of the intermediate frequency furnace comprises the steps of smelting 5-10 aluminum-iron alloy furnaces before smelting the manganese metal alloy by using the intermediate frequency furnaceGold, and Al with the thickness of 10-20mm is generated on the inner wall of the intermediate frequency furnace 2 O 3 Densifying the attachment shell, and then smelting the manganese metal alloy.
When the plant uses an intermediate frequency furnace to smelt another alloy product, namely the aluminum-iron alloy, the main raw material used is aluminum ingot, and aluminum is oxidized at high temperature to generate Al 2 O 3 The oxides can be adhered to the furnace wall, compact attachments are generated under the high temperature and high pressure in the intermediate frequency furnace, the oxides can be gradually thickened along with the increase of the number of smelting furnaces, an oxide shell with a certain thickness is formed on the inner wall of the intermediate frequency furnace, and the shell is not melted at the high temperature of 1600 ℃ through on-site verification. Therefore, before the metal manganese alloy is smelted in the intermediate frequency furnace, the aluminum-iron alloy in the furnace 5-10 is smelted, the Al2O3 dense attachment shell with the thickness of about 10-20mm is generated on the inner wall of the intermediate frequency furnace, and then the metal manganese alloy is smelted.
The method is actually applied to a production field, the obtained effect is good, the age of the manganese metal smelted by the intermediate frequency furnace is prolonged to be more than 350, and through detection, all indexes of the manganese metal alloy product meet the quality standard and meet the use requirements of customers.
The smelting time is prolonged to 18 days from the original 5 days, the frequency of newly repairing the furnace lining is reduced, and the production efficiency of the intermediate frequency furnace is improved. The furnace life of the intermediate frequency furnace is improved to more than 350 furnaces from about 100 furnaces, and is improved by more than 250%. The cost of the manganese metal refractory is reduced to 25.7 yuan/ton, and the reduction amplitude reaches 71.4 percent.
Detailed Description
A production process for smelting manganese metal alloy by using a composite furnace lining of an intermediate frequency furnace comprises the steps of smelting 6 aluminum-iron alloy furnaces before smelting manganese metal alloy by using the intermediate frequency furnace, and enabling the inner wall of the intermediate frequency furnace to generate Al with the thickness of 15mm 2 O 3 Densifying the attachment shell, and then smelting the manganese metal alloy.
Claims (1)
1. A production process for smelting manganese metal alloy by using a composite furnace lining of an intermediate frequency furnace is characterized by comprising the following steps of: before smelting manganese metal alloy in an intermediate frequency furnace, smelting 5-10 aluminum-iron alloy in the furnace to generate Al with the thickness of 10-20mm on the inner wall of the intermediate frequency furnace 2 O 3 Densifying the attachment shell, and then smelting the manganese metal alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210931109.1A CN115369268A (en) | 2022-08-04 | 2022-08-04 | Production process for smelting manganese metal alloy by composite furnace lining of intermediate frequency furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210931109.1A CN115369268A (en) | 2022-08-04 | 2022-08-04 | Production process for smelting manganese metal alloy by composite furnace lining of intermediate frequency furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115369268A true CN115369268A (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210931109.1A Pending CN115369268A (en) | 2022-08-04 | 2022-08-04 | Production process for smelting manganese metal alloy by composite furnace lining of intermediate frequency furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115369268A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591720A (en) * | 2009-04-16 | 2009-12-02 | 莱芜市泰钢新材料有限责任公司 | A kind of production method of aluminum-manganese-iron alloy |
| CN102816962A (en) * | 2011-06-08 | 2012-12-12 | 伍宏斌 | Low silicon high-purity manganese metal and preparation method thereof |
| CN104195359A (en) * | 2014-07-16 | 2014-12-10 | 沈阳航空航天大学 | High-manganese-content aluminum-manganese intermediate alloy and manufacturing method thereof |
| CN111875396A (en) * | 2020-07-28 | 2020-11-03 | 中国一冶集团有限公司 | Preparation method of dry material for stainless steel smelting intermediate frequency furnace lining |
-
2022
- 2022-08-04 CN CN202210931109.1A patent/CN115369268A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591720A (en) * | 2009-04-16 | 2009-12-02 | 莱芜市泰钢新材料有限责任公司 | A kind of production method of aluminum-manganese-iron alloy |
| CN102816962A (en) * | 2011-06-08 | 2012-12-12 | 伍宏斌 | Low silicon high-purity manganese metal and preparation method thereof |
| CN104195359A (en) * | 2014-07-16 | 2014-12-10 | 沈阳航空航天大学 | High-manganese-content aluminum-manganese intermediate alloy and manufacturing method thereof |
| CN111875396A (en) * | 2020-07-28 | 2020-11-03 | 中国一冶集团有限公司 | Preparation method of dry material for stainless steel smelting intermediate frequency furnace lining |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20221122 |