CN1373229A - Method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace - Google Patents
Method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace Download PDFInfo
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- CN1373229A CN1373229A CN 01108112 CN01108112A CN1373229A CN 1373229 A CN1373229 A CN 1373229A CN 01108112 CN01108112 CN 01108112 CN 01108112 A CN01108112 A CN 01108112A CN 1373229 A CN1373229 A CN 1373229A
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- frequency
- induction furnace
- steel
- stainless steel
- stove
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 239000010935 stainless steel Substances 0.000 title claims abstract description 29
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 29
- 230000006698 induction Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 21
- 239000002699 waste material Substances 0.000 title claims abstract description 19
- 238000003723 Smelting Methods 0.000 title claims abstract description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052786 argon Inorganic materials 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000007670 refining Methods 0.000 abstract description 18
- 239000011819 refractory material Substances 0.000 abstract description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 229910001882 dioxygen Inorganic materials 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000005261 decarburization Methods 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000011449 brick Substances 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910001341 Crude steel Inorganic materials 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-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
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 235000014380 magnesium carbonate Nutrition 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A process for smelting stainless steel with waste steel in frequency-conversion induction furnace includes charging the waste stainless steel into said furnace for smelting while adding slags, supplying argon or nitrogen gas from bottom and oxygen gas from top when temp reaches 1600-1750 deg.c, stopping blowing oxygen when carbon content reaches a predetermined value, adding Si-series or Al-series reducer for reducing Cr from slag to steel, and discharging. It advantages are low content of carbon, short refining time, less consumption of refractory material and gas, adjustable temp of smelting furnace, and high speed to reduce carbon.
Description
The present invention relates to a kind of production method of smelting stainless steel.
Prior art is produced stainless method electric arc furnace list refining method, argon-oxygen-decarburization process, vacuum oxygen decarburization process, converter top-blow method and converter top and bottom complex blowing method etc.Electric arc furnace is a smelting stainless steel method early, and it all carries out in a stove to oxidation and decarbonization, refining and reduction from the fusing of steel scrap and iron alloy, and its shortcoming is that smelting cycle is long, and the recovery rate of power consumption height, particularly iron alloy (chromium) is low.Argon-oxygen-decarburization process generally adopts duplex practice, and it melts good crude steel with electric arc furnace, converts to argon oxygen decarburizing furnace and carries out refining through adjusting molten steel that its temperature of back and composition satisfy the argon oxygen decarburizing furnace smelting requirements.Because the refining requirement, it is higher to convert in the crude molten steel to the stove carbon content, is generally 1% to 2%, and therefore in 2 to 3 phases of stove domestic demand refining, tap to tap time is longer, and gas consumption is big, and particularly the argon gas consumption to costliness is bigger, and cost is higher.Vacuum oxygen decarburization process is that the molten steel with electric furnace or converter goes out to the refining bag, refining bag bottom has the gas permeable brick of blowing argon gas, the refining ladle that crude molten steel is housed is moved on in the vacuum chamber, carry out oxygen blast carbon drop and alloying, this method is similar to argon-oxygen-decarburization process, all is the purpose that carbon monoxide pressure of tension reaches dark decarburization in dividing by reduction gas.Stainless steel gas and foreign matter content that this method is smelted are lower, and the quality of steel is good, but that shortcoming is facility investment is bigger, and ladle life is low, and smelting cycle is longer, the cost height of steel.Top-blown oxygen converter method smelting stainless steel needs low-phosphorous molten iron, therefore must have hot metal pretreatment equipment, owing in atmosphere, smelt, the oxidation of chromium is bigger, and very difficult low-carbon (LC) and the Ultralow Carbon Stainless Steel produced, reach and produce low-carbon (LC) and Ultralow Carbon Stainless Steel, must match with other external refining equipment (as RH), facility investment is bigger.
The object of the present invention is to provide a kind of is the method for raw material smelting low carbon or Ultralow Carbon Stainless Steel with waste stainless steel, produces the stainless steel that meets the demands by frequency-conversion induction furnace fusing, refining and deoxidation alloying.
Technical scheme of the present invention is: a kind of method of smelting stainless steel with waste steel by frequency-conversion electric induction furnace comprises the steps:
(1), will the waste stainless steel material add in the frequency-conversion induction furnace and melt, and in stove, add slag charge;
(2), when the bath temperature in the stove reaches 1600 ℃～1750 ℃, carry out the end for argon gas or nitrogen, top blast oxygen is to the molten bath oxygen supply simultaneously;
(3), when carbon content reaches target value set in the steel in the molten bath, promptly stop oxygen blast, only carry out argon bottom-blowing or nitrogen, adding silicon system or aluminium again is that reductive agent is reduced to the chromium in the slag in the steel;
(4), finished product is come out of the stove.
The present invention compared with prior art has following advantage:
1, the crude steel carbon content is low, and refining time is short.With waste stainless steel or self-produced stainless steel returns, the crude molten steel carbon content is low, is between 0.08% to 0.5% fully for raw materials for production, so the Decarburising and refining time is short, has only 5 to 30 minutes.
2, refractory materials and gas consumption are low.Because refining time is short, the bath temperature precise control so refractory materials and gas consumption are low, can reduce production costs.
3, bath temperature whole process is adjustable, and alloy oxidation is few, and carbon drop speed is fast.Because refining is to carry out in frequency conversion refining holding furnace, therefore the temperature in the molten bath can be adjusted to the refining target temperature at any time, avoided other smelting process because bath temperature is low and added a large amount of heat-generating agent (as ferrosilicon etc.), caused a large amount of wastes of alloy and the erosive velocity of furnace lining to accelerate to bath.
Embodiment: a kind of method of smelting stainless steel with waste steel by frequency-conversion electric induction furnace comprises the steps:
(1), will the waste stainless steel material add in the frequency-conversion induction furnace and melt, and in stove, add slag charge;
(2), when the bath temperature in the stove reaches 1600 ℃～1750 ℃, preferably when the bath temperature in the stove reaches 1650 ℃～1680 ℃, carry out the end for argon gas or nitrogen, top blast oxygen is to the molten bath oxygen supply simultaneously;
(3), when carbon content reaches target value set in the steel in the molten bath, promptly stop oxygen blast, only carry out argon bottom-blowing or nitrogen, adding silicon system or aluminium again is that reductive agent is reduced to the chromium in the slag in the steel;
(4), finished product is come out of the stove.
Can adopt duplex practice, promptly described frequency-conversion induction furnace comprises first frequency-conversion induction furnace and second frequency-conversion induction furnace; The waste stainless steel material is added when being melted to 1600 ℃～1750 ℃ in first frequency-conversion induction furnace, convert the bottom in stove in argon gas or nitrogen second medium-frequency induction furnace; After having converted molten steel, in second medium-frequency induction furnace, add slag charge, and the temperature of regulating this stove bath is carried out top blast oxygen to the molten bath oxygen supply when being 1600 ℃～1750 ℃.
Example 1: with the furnace lining of electrosmelted magnesite clinker knotting, magnesian content greater than 96%, the burner hearth internal diameter is 220 millimeters intermediate frequency refining furnace, porous plug brick and continuous measurement of molten steel temperature probe are installed in the furnace lining bottom.Each constituent content in the stainless steel is fitted in the scope of requirement, and wherein chromium 18.4%, and carbon 0.25%, Intake Quantity are 50 kilograms, and when steel scrap melts fully, and temperature opens bottom nozzle when being 1660 ℃, is blown into argon gas in stove, and argon flow amount is 2NM
3/ h.Simultaneously carry out the downward oxygen blast in top to the molten bath, oxygen flow is 6NM
3/ h.In top blowing oxygen, in the molten bath, add totally 4.5 kilograms in matured slag material, lime and fluorite.Blow after 5 minutes, stop top blowing oxygen, only carried out argon bottom-blowing 4 minutes, in stove, add totally 1 kilogram in lime and fluorite, 0.8 kilogram of low-carbon ferrosilicon during this gradually.Reduction period strengthens the supply power of medium-frequency induction furnace, guarantees that bath temperature is about 1700 ℃, and after the finishing blowing, reducing bath temperature is 1580 to 1600 ℃, skims, steel tapping casting becomes steel ingot, thereby obtain the lower stainless steel of carbon content.Wherein main component content is chromium 17.6%, carbon 0.047%.
Example 2, with the furnace lining of electrosmelted magnesite clinker knotting, the burner hearth internal diameter is 460 millimeters, furnace bottom is equipped with the porous plug brick.Each element in the waste stainless steel is made in the claimed range, and wherein chromium 18.0%, and carbon 0.18%, Intake Quantity are 250 kilograms, and in the time of the energising melting waste steel, the bottom blowing nozzle is opened blowing argon gas in stove, and flow is 0.3NM
3/ h, when steel scrap melts and temperature when reaching 1650 to 1680 ℃ fully, top blowing oxygen is to the molten bath oxygen supply, and flow is 20NM
3/ h in the oxygen blown while, strengthens the air demand of argon bottom-blowing, and flow is increased to 4NM
3/ h.In this process, in stove, add totally 20 kilograms in matured slag, lime and fluorite gradually.Blow after 4 minutes, stop oxygen blast, only carried out argon bottom-blowing 5 minutes.In stove, add 5 kilograms of slag charges during this gradually, 4 kilograms of low-carbon ferrosilicons, reduction period strengthens the feed rate of spirit, guarantees that slag fully stirs.Simultaneously guarantee bath temperature all the time about 1700 ℃, after the finishing blowing, reducing bath temperature is about 1580 to 1600 ℃, skims, taps, pours into steel ingot.Thereby obtain low carbon stainless steel, wherein main component content is chromium 17.2%, carbon 0.036%.
Claims (3)
1, a kind of method of smelting stainless steel with waste steel by frequency-conversion electric induction furnace is characterized in that: comprise the steps:
(1), will the waste stainless steel material add in the frequency-conversion induction furnace and melt, and in stove, add slag charge;
(2), when the bath temperature in the stove reaches 1600 ℃～1750 ℃, carry out the end for argon gas or nitrogen, top blast oxygen is to the molten bath oxygen supply simultaneously;
(3), when carbon content reaches target value set in the steel in the molten bath, promptly stop oxygen blast, only carry out argon bottom-blowing or nitrogen, adding silicon system or aluminium again is that reductive agent is reduced to the chromium in the slag in the steel;
(4), finished product is come out of the stove.
2, the method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace according to claim 1 is characterized in that: described frequency-conversion induction furnace comprises first frequency-conversion induction furnace and second frequency-conversion induction furnace; The waste stainless steel material is added when being melted to 1600 ℃～1750 ℃ in first frequency-conversion induction furnace, convert the bottom in stove in argon gas or nitrogen second medium-frequency induction furnace; After having converted molten steel, in second medium-frequency induction furnace, add slag charge, and the temperature of regulating this stove bath is carried out top blast oxygen to the molten bath oxygen supply when being 1600 ℃～1750 ℃.
3, the method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace according to claim 1 is characterized in that: when the bath temperature in the stove reaches 1650 ℃～1680 ℃, carry out the end for argon gas or nitrogen, top blast oxygen is to the molten bath oxygen supply simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011081120A CN1195079C (en) | 2001-03-05 | 2001-03-05 | Method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011081120A CN1195079C (en) | 2001-03-05 | 2001-03-05 | Method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1373229A true CN1373229A (en) | 2002-10-09 |
| CN1195079C CN1195079C (en) | 2005-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011081120A Expired - Fee Related CN1195079C (en) | 2001-03-05 | 2001-03-05 | Method for smelting stainless steel with waste steel by frequency-conversion electric induction furnace |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352960C (en) * | 2002-10-18 | 2007-12-05 | 新日本制铁株式会社 | Refining method of chromium containing fused metal |
| CN100439538C (en) * | 2007-02-15 | 2008-12-03 | 刘巍 | Production process of low microcarbon ferromanganese alloy |
| CN101986079A (en) * | 2010-07-22 | 2011-03-16 | 山西太钢不锈钢股份有限公司 | Slag adding method for intermediate frequency induction furnace |
| CN102321783A (en) * | 2011-09-19 | 2012-01-18 | 武汉钢铁(集团)公司 | Steel-making method of experimental induction furnace |
| CN104099443A (en) * | 2014-07-14 | 2014-10-15 | 张家港市广大机械锻造有限公司 | CrMo steel scrap dephosphorization and chrome-preservation smelting process |
| CN104531952A (en) * | 2014-12-23 | 2015-04-22 | 金坛市鑫特机械有限公司 | Induction furnace suitable for refining low-smelting-quantity steel casting molten steel and relevant refining process |
| CN105463156A (en) * | 2015-12-02 | 2016-04-06 | 四川民盛特钢锻造有限公司 | Method for smelting ultra-low carbon stainless steel through intermediate frequency furnace |
| CN107043843A (en) * | 2017-05-24 | 2017-08-15 | 孙雪梅 | A kind of intermediate frequency argon oxygen refinery practice |
| CN107326150A (en) * | 2017-06-16 | 2017-11-07 | 北京科技大学 | A kind of production method of full steel scrap electric arc furnaces duplex Clean Steel Smelting |
| CN107760823A (en) * | 2017-11-22 | 2018-03-06 | 北京科技大学 | A kind of quasi-continuous steelmaking system of steel scrap electric arc furnaces entirely and technique |
| CN109182656A (en) * | 2018-10-31 | 2019-01-11 | 太原科技大学 | A method of utilizing stainless steel scrap smelting stainless steel |
| CN110343938A (en) * | 2019-08-09 | 2019-10-18 | 宁夏亚启科技有限公司 | Utilize the method for variable frequency induction melting furnace remelting alloy powder |
| US10767239B2 (en) | 2017-06-16 | 2020-09-08 | University Of Science And Technology Beijing | Production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces |
-
2001
- 2001-03-05 CN CNB011081120A patent/CN1195079C/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352960C (en) * | 2002-10-18 | 2007-12-05 | 新日本制铁株式会社 | Refining method of chromium containing fused metal |
| CN100439538C (en) * | 2007-02-15 | 2008-12-03 | 刘巍 | Production process of low microcarbon ferromanganese alloy |
| CN101986079A (en) * | 2010-07-22 | 2011-03-16 | 山西太钢不锈钢股份有限公司 | Slag adding method for intermediate frequency induction furnace |
| CN101986079B (en) * | 2010-07-22 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Slag adding method for intermediate frequency induction furnace |
| CN102321783A (en) * | 2011-09-19 | 2012-01-18 | 武汉钢铁(集团)公司 | Steel-making method of experimental induction furnace |
| CN102321783B (en) * | 2011-09-19 | 2013-03-20 | 武汉钢铁(集团)公司 | Steel-making method of experimental induction furnace |
| CN104099443A (en) * | 2014-07-14 | 2014-10-15 | 张家港市广大机械锻造有限公司 | CrMo steel scrap dephosphorization and chrome-preservation smelting process |
| CN104099443B (en) * | 2014-07-14 | 2016-02-24 | 张家港市广大机械锻造有限公司 | CrMo steel waste material dephosphorization protects chromium smelting technology |
| CN104531952A (en) * | 2014-12-23 | 2015-04-22 | 金坛市鑫特机械有限公司 | Induction furnace suitable for refining low-smelting-quantity steel casting molten steel and relevant refining process |
| CN105463156B (en) * | 2015-12-02 | 2017-08-29 | 四川民盛特钢锻造有限公司 | A kind of method of intermediate frequency furnace smelting ultralow-carbon stainless steel |
| CN105463156A (en) * | 2015-12-02 | 2016-04-06 | 四川民盛特钢锻造有限公司 | Method for smelting ultra-low carbon stainless steel through intermediate frequency furnace |
| CN107043843A (en) * | 2017-05-24 | 2017-08-15 | 孙雪梅 | A kind of intermediate frequency argon oxygen refinery practice |
| CN107326150A (en) * | 2017-06-16 | 2017-11-07 | 北京科技大学 | A kind of production method of full steel scrap electric arc furnaces duplex Clean Steel Smelting |
| CN107326150B (en) * | 2017-06-16 | 2018-04-03 | 北京科技大学 | A kind of production method of full steel scrap electric arc furnaces duplex Clean Steel Smelting |
| WO2018227836A1 (en) * | 2017-06-16 | 2018-12-20 | 北京科技大学 | Method for producing clean steel by means of electric arc furnace dual smelting of full scrap steel |
| US10767239B2 (en) | 2017-06-16 | 2020-09-08 | University Of Science And Technology Beijing | Production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces |
| CN107760823A (en) * | 2017-11-22 | 2018-03-06 | 北京科技大学 | A kind of quasi-continuous steelmaking system of steel scrap electric arc furnaces entirely and technique |
| CN107760823B (en) * | 2017-11-22 | 2023-04-25 | 北京科技大学 | An all-scrap electric arc furnace quasi-continuous steelmaking system and process |
| CN109182656A (en) * | 2018-10-31 | 2019-01-11 | 太原科技大学 | A method of utilizing stainless steel scrap smelting stainless steel |
| CN110343938A (en) * | 2019-08-09 | 2019-10-18 | 宁夏亚启科技有限公司 | Utilize the method for variable frequency induction melting furnace remelting alloy powder |
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| Publication number | Publication date |
|---|---|
| CN1195079C (en) | 2005-03-30 |
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