CN103468856A - Method for steel molybdenum alloying - Google Patents
Method for steel molybdenum alloying Download PDFInfo
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- CN103468856A CN103468856A CN2013103704596A CN201310370459A CN103468856A CN 103468856 A CN103468856 A CN 103468856A CN 2013103704596 A CN2013103704596 A CN 2013103704596A CN 201310370459 A CN201310370459 A CN 201310370459A CN 103468856 A CN103468856 A CN 103468856A
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Abstract
The invention relates to the technical field of steel alloying, in particular to a method for steel molybdenum alloying. The method comprises the following molten steel alloying processing steps: laying lime on a furnace bottom after the slag splashing in a converter is finished, adding molybdenum oxide and steel scrap into the converter together, then adding molten iron into the converter and mixing, converting, and gaining molten steel containing molybdenum. The technology is simple, the operation is very easy, no reducing agent is needed, and on the premise of reducing product cost, the production efficiency is improved, and the molybdenum content in the product is stabilized.
Description
Technical field
the present invention relates to the alloying process field of steel, especially relate to a kind of molybdenum alloy method of steel.
Background technology
After 2012, the whole steel industry situation of China is severeer, each big steel enterprise all, around steel industry " cost efficiency " strategic planning, further reduces production costs under the prerequisite that does not reduce quality product and rhythm of production, and then gets larger economic benefit and improve the market competitiveness.
Along with the development of alloying steel grade, the demand of iron alloy is more and more, and its price is also more and more high.Traditional steel alloying method is positioned over the molten steel of having smelted in ladle, and with iron alloy, mix, melting, realize the alloying of steel, this technique needs special refining iron alloy, increases energy consumption, improves product cost, and more consuming time.Therefore, how in steelmaking process by the molten steel DIRECT ALLOYING, be those skilled in the art's problem demanding prompt solutions.
The patent document that publication number is CN 1302914 discloses a kind of method that adopts molybdenum oxide DIRECT ALLOYING smelting Mo-contained alloy steel, the more traditional alloying technology containing the molybdenum steel molybdenum of the method, energy consumption and cost of alloy have been reduced, but the method complex steps, molybdenum oxide and reductive agent need to be ground into to the particle shove charge, then smelted with the steel scrap electric arc furnace of packing into successively, be not suitable for the converter steelmaking in existing main flow process for making.
Summary of the invention
in order to overcome the prior art deficiency, the invention provides a kind of molybdenum alloy method of steel, technique of the present invention is simple, and very easily operation, do not need reductive agent, under the prerequisite that reduces product cost, enhance productivity, molybdenum content in stable prod.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of molybdenum alloy method of steel, comprise the molten steel alloying process, and step is as follows: after the slag end is spattered in converter, and furnace bottom lay lime; Molybdenum oxide is added in converter together with steel scrap, then in converter, add molten iron and mix, blown.
Preferably, described molybdenum oxide is industrial molybdenum oxide, and component quality proportioning is as follows: Mo>=48%, S≤0.08%, Cu≤0.3%, P≤0.04%, Sn≤0.05%, Sb≤0.03%, H
2o≤0.50, surplus is harmless impurity element.
Preferably, furnace bottom lay lime is 0-20kg/t with the quality proportioning of blowing raw material, and described blowing raw material is molybdenum oxide, steel scrap and molten iron.
For reducing the volatilization of reduction process molybdenum in converter smelting, can spatter after slag finishes and add lime in converter in converter, target molybdenum content according to made molybdenum steel product, in bulk or barreled industrial molybdenum oxide are added to steel scrap bucket front portion, add in converter with steel scrap, make molybdenum oxide contact and use up maximum ground with lime and generate calcium molybdate; Then carry out conventional oxygen converter and smelt and get final product containing molybdenum steel water to being blended into molten iron in converter.The staff is molybdenum content in the argon station is got containing molybdenum steel water sample comparative analysis steel subsequently.In the situation that if molten iron temperature is lower or the converter furnace outage time is longer, consider and smelt ignition difficulties while starting, can in converter, not add lime.
The present invention compared with prior art, has following advantage:
1) technique is simple, easy to operate, without any reductive agent and raw materials pretreatment, improves enterprises production efficiency;
2) replace the ferro-molybdenum metallization processes in traditional technology, in the liquid steel refining process, without adding molybdenum-iron, steel is stabilized in more than 90% in the converter smelting operation to the specific absorption of molybdenum, met or exceeded the alloying effect of molybdenum-iron;
3) saved when enterprise adopts traditional ferro-molybdenum metallization processes special refining iron alloy equipment, reduced corresponding energy consumption and cost of alloy, also there is power saving, reduce the refining quantity of slag, do not affect the advantages such as quality product and rhythm of production.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
embodiment 1
In the situation that molten iron temperature lower (lower than 1280 ℃) or converter furnace outage time are longer, to consider and smelt ignition difficulties while starting, the shop fixtures lime adding amount is 0 kilogram.
Converter (blowing material Intake Quantity is 160 tons) directly adds steel scrap bucket front portion by molybdenum oxide (360 kilograms) after spattering the slag end, with steel scrap (5 tons), adds in converter; Then carry out conventional Converter Oxigen Blowing and smelt that (about oxygen blow duration 14 minutes, smelting cycle is about 35 minutes to being blended into molten iron (155 tons) in converter; Tap: 153 tons of left and right; 1660 ℃ of left and right of terminal temperature, end point carbon 0.05% left and right.) get final product molybdenum content be 0.12% left and right containing molybdenum steel water.The staff is molybdenum content in the argon station is got containing molybdenum steel water sample comparative analysis steel subsequently, and the specific absorption of molybdenum is more than 90%, and the average absorption rate has reached 93%.
Described molybdenum oxide component quality proportioning is as follows: amount to metal M o:55%, S:0.05%, Cu:0.2%, P:0.03%, Sn:0.03%, Sb:0.02%, H
2o≤0.10%, surplus is harmless impurity element.
embodiment 2
Under normal molten iron condition and converter smelting condition, the shop fixtures lime adding amount is 1603.0 kilograms.
Converter (Intake Quantity is 160 tons) directly adds steel scrap bucket front portion by molybdenum oxide (300 kilograms) after spattering the slag end, with steel scrap (5 tons), adds in converter; Then carry out conventional Converter Oxigen Blowing and smelt that (about oxygen blow duration 14 minutes, smelting cycle is about 35 minutes to being blended into molten iron (155 tons) in converter; Tap: 153 tons of left and right; 1660 ℃ of left and right of terminal temperature, end point carbon 0.05% left and right.) get final product molybdenum content be 0.12% left and right containing molybdenum steel water.The staff is molybdenum content in the argon station is got containing molybdenum steel water sample comparative analysis steel subsequently, and the specific absorption of molybdenum is more than 90%, and the average absorption rate has reached 95%.
Described molybdenum oxide component quality proportioning is as follows: amount to metal M o:57%, S:0.05%, Cu:0.2%, P:0.03%, Sn:0.03%, Sb:0.02%, H
2o≤0.10%, surplus is harmless impurity element.
embodiment 3
Under normal molten iron condition and converter smelting condition, the shop fixtures lime adding amount is 3206.0 kilograms.
Converter (Intake Quantity is 160 tons) directly adds steel scrap bucket front portion by molybdenum oxide (300 kilograms) after spattering the slag end, with steel scrap (5 tons), adds in converter; Then carry out conventional Converter Oxigen Blowing and smelt that (about oxygen blow duration 14 minutes, smelting cycle is about 35 minutes to being blended into molten iron (155 tons) in converter; Tap: 153 tons of left and right; 1660 ℃ of left and right of terminal temperature, end point carbon 0.05% left and right.) get final product molybdenum content be 0.12% left and right containing molybdenum steel water.The staff is molybdenum content in the argon station is got containing molybdenum steel water sample comparative analysis steel subsequently, and the specific absorption of molybdenum is more than 90%, and the average absorption rate has reached 95%.
Described molybdenum oxide component quality proportioning is as follows: amount to metal M o:62%, S:0.05%, Cu:0.2%, P:0.03%, Sn:0.03%, Sb:0.02%, H
2o≤0.10%, surplus is harmless impurity element.
Claims (3)
1. the molybdenum alloy method of a steel, comprise the molten steel alloying process, it is characterized in that, step is as follows: after the slag end is spattered in converter, and furnace bottom lay lime; Molybdenum oxide is added in converter together with steel scrap, then in converter, add molten iron and mix, blown.
2. the molybdenum alloy method of a kind of steel as claimed in claim 1, is characterized in that, described molybdenum oxide is industrial molybdenum oxide, and component quality proportioning is as follows: Mo>=48%, S≤0.08%, Cu≤0.3%, P≤0.04%, Sn≤0.05%, Sb≤0.03%, H
2o≤0.50, surplus is harmless impurity element.
3. the molybdenum alloy method of a kind of steel as claimed in claim 1 is characterized in that: furnace bottom lay lime is 0-20kg/t with the quality proportioning of blowing raw material, and described blowing raw material is molybdenum oxide, steel scrap and molten iron.
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| CN2013103704596A CN103468856A (en) | 2013-08-23 | 2013-08-23 | Method for steel molybdenum alloying |
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| CN2013103704596A CN103468856A (en) | 2013-08-23 | 2013-08-23 | Method for steel molybdenum alloying |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200185A (en) * | 2015-09-29 | 2015-12-30 | 南京钢铁股份有限公司 | Steelmaking alloying smelting process for oxide with molybdenum in electric furnaces with high molten iron ratios |
| CN108048729A (en) * | 2017-12-15 | 2018-05-18 | 中钢集团邢台机械轧辊有限公司 | A kind of method that molybdenum element is added in steelmaking process |
| CN110951933A (en) * | 2019-11-08 | 2020-04-03 | 包头钢铁（集团）有限责任公司 | Method for smelting Mo steel by using Mo-containing steel scrap converter |
| CN112708720A (en) * | 2020-12-10 | 2021-04-27 | 安阳钢铁股份有限公司 | Smelting method for improving niobium yield of low-carbon low-silicon niobium-containing steel |
| CN115820979A (en) * | 2022-12-06 | 2023-03-21 | 中天钢铁集团有限公司 | Direct alloying method of molybdenum concentrate |
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| US4160661A (en) * | 1977-12-23 | 1979-07-10 | Placer Development Limited | Process for the production of ferromolybdenum in an electric arc furnace |
| KR950003806B1 (en) * | 1992-12-30 | 1995-04-20 | 포항종합제철 주식회사 | Adding method of molybdenum |
| CN1302914A (en) * | 2000-10-18 | 2001-07-11 | 钢铁研究总院 | Technology for smelting Mo-contained alloy steel with molybdenum oxide |
| KR20020040425A (en) * | 2000-11-24 | 2002-05-30 | 이구택 | method for decreasing evaporation loss of MoOx in furnace |
| CN101177755A (en) * | 2007-12-12 | 2008-05-14 | 钢铁研究总院 | Method for smelting high-speed steel by employing oxide ore |
| CN102994743A (en) * | 2012-12-10 | 2013-03-27 | 山西太钢不锈钢股份有限公司 | Method for directly alloying molybdenum oxide mixed briquetting |
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2013
- 2013-08-23 CN CN2013103704596A patent/CN103468856A/en active Pending
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| US4160661A (en) * | 1977-12-23 | 1979-07-10 | Placer Development Limited | Process for the production of ferromolybdenum in an electric arc furnace |
| KR950003806B1 (en) * | 1992-12-30 | 1995-04-20 | 포항종합제철 주식회사 | Adding method of molybdenum |
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| KR20020040425A (en) * | 2000-11-24 | 2002-05-30 | 이구택 | method for decreasing evaporation loss of MoOx in furnace |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200185A (en) * | 2015-09-29 | 2015-12-30 | 南京钢铁股份有限公司 | Steelmaking alloying smelting process for oxide with molybdenum in electric furnaces with high molten iron ratios |
| CN105200185B (en) * | 2015-09-29 | 2017-07-28 | 南京钢铁股份有限公司 | A kind of smelting process of molybdenum-containing oxide in high hot metal ratio Alloying of Electric Furnace Steelmaking |
| CN108048729A (en) * | 2017-12-15 | 2018-05-18 | 中钢集团邢台机械轧辊有限公司 | A kind of method that molybdenum element is added in steelmaking process |
| CN110951933A (en) * | 2019-11-08 | 2020-04-03 | 包头钢铁（集团）有限责任公司 | Method for smelting Mo steel by using Mo-containing steel scrap converter |
| CN112708720A (en) * | 2020-12-10 | 2021-04-27 | 安阳钢铁股份有限公司 | Smelting method for improving niobium yield of low-carbon low-silicon niobium-containing steel |
| CN115820979A (en) * | 2022-12-06 | 2023-03-21 | 中天钢铁集团有限公司 | Direct alloying method of molybdenum concentrate |
| CN115820979B (en) * | 2022-12-06 | 2024-07-23 | 中天钢铁集团有限公司 | Direct alloying method of molybdenum concentrate |
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Application publication date: 20131225 |