CN102808061A - Method for smelting nickel-containing steel by using low-nickel pig iron in converter - Google Patents
Method for smelting nickel-containing steel by using low-nickel pig iron in converter Download PDFInfo
- Publication number
- CN102808061A CN102808061A CN2012103006922A CN201210300692A CN102808061A CN 102808061 A CN102808061 A CN 102808061A CN 2012103006922 A CN2012103006922 A CN 2012103006922A CN 201210300692 A CN201210300692 A CN 201210300692A CN 102808061 A CN102808061 A CN 102808061A
- Authority
- CN
- China
- Prior art keywords
- nickel
- pig iron
- steel
- low
- low nickel
- 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.)
- Granted
Links
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method for smelting nickel-containing steel by using low-nickel pig iron in a converter and belongs to the technical field of converter steelmaking. According to the technical parameters controlled in a process, the proportion of the low-nickel pig iron can be calculated based on 99 percent of the actual nickel-containing amount in the low-nickel pig iron and absorptivity; furnace charges contain molten iron, scrap steel and low-nickel pig iron; and the oxygen supply amount of the whole blowing process in a converter blowing process can be improved by 2 to 10 percent. The method has the advantages that the dependence on high-valence alloy resources such as electrolytic nickel or ferronickel in a process of producing nickel-containing steel by using the converter can be reduced, the requirement of nickel alloying of the nickel-containing steel grades can be met, and the nickel-containing steel can be produced at low cost simultaneously.
Description
Technical field
The invention belongs to the converter steeling technology field, particularly relate to and adopt low nickel pig iron smelting to contain the method for nickel steel in a kind of converter, mainly be applicable to the steel grade of nickel content at 0.10-0.50%.
Background technology
Nickel is the element that a lot of steel grades need add, and the method for mainly taking smelting process to add nickel-containing alloys such as electrolytic nickel or ferronickel realizes.Nickel mainly relies in the nickel-bearing laterite and extracts, and along with the minimizing of global nickel sulfide ore resource, refining difficulty increases, and the electrolytic nickel cost continues to rise, and has caused nickeliferous steel to cause this rising; The low-cost method of obtaining nickel mainly adopts small furnace to smelt from laterite, and its product is pressed the nickel grade and divided low the nickel pig iron, the middle nickel pig iron and the nickelic pig iron.The low nickel pig iron is compared relative low price with the middle and high nickel pig iron.More in the application of electric furnace steel mill at present, low nickel pig iron smelting beyond example is still used in converter.Electric furnace steel mill uses the low nickel pig iron mainly to be used for producing stainless steel; Advantage is that every stove can add in enormous quantities, because the production cycle is long, every stove tap to tap time is more than 40 minutes; So the low nickel pig iron can melt fully, impurity elements such as the P that brings into, S also can be removed preferably.When converter adopted nickel-containing alloys such as alternative electrolytic nickel of the low nickel pig iron or ferronickel to produce, because with short production cycle, the low nickel pig iron must melt in the short cycle fully; Impurity element such as P, S also need remove as early as possible, and whole smelting process control difficulty is bigger, and the therefore low nickel pig iron fails to be implemented in the application of converter; In order to address this problem; The present invention proposes and adopt low nickel pig iron smelting to contain the method for nickel steel in a kind of converter, can realize stable control, effectively reduce cost of alloy.
Summary of the invention
The object of the present invention is to provide a kind of in converter, the employing to hang down the method that the nickel pig iron smelting contains nickel steel; To the dependence of high price alloy resources such as electrolytic nickel or ferronickel, realize low cost prodn when satisfying nickeliferous steel grade nickelalloy requirement when reducing converter production and containing nickel steel.
The present invention realizes through following technical proposal:
Low nickel pig iron proportional quantity calculates according to actual nickel content in the low nickel pig iron and specific absorption 99%.
The low nickel pig iron is selected the different systems of packing into according to different usage quantitys, and furnace charge constitutes: molten iron, steel scrap and the low nickel pig iron, the wherein low nickel pig iron and steel scrap sum are 50-260kg/t.Low nickel pig iron add-on adds with steel scrap, and will mix the adding of scattering with steel scrap when 10-65kg/t, prevents to concentrate on local gathering the in the steel scrap hopper; During add-on 65-260kg/t, add the low nickel pig iron and steel scrap behind the then first hot metal charging, perhaps add earlier and be not more than 25% the low nickel pig iron and steel scrap, hot metal charging adds afterwards more again.
Can reduce adding amount of scrap steel in the ratio of 1.05 ~ 1.10:1 after adopting the low nickel pig iron.
Bessemerize in the process, oxygen supply intensity is at 2.5-4.0Nm
3Fluctuation in the/t ﹒ min scope, the time of 1/3-1/4 is taked 2.5-3.0 Nm before the blowing
3Blow in the oxygen supply intensity scope of/t ﹒ min, and suitably increase the 2-5kg/t lime and guarantee basicity of slag between 2.8-4.0, the blowing later stage is adopted high oxygen supply intensity (3.0-4.0Nm during especially near blow end point
3/ t ﹒ min) blows; The assurance ultimate constituent is even; Phosphorus content can be controlled between the 0.006%-0.020% as required in the molten steel, and sulphur content can be controlled between the 0.005%-0.020% as required in the molten steel, the more conventional converter smelting oxygen-supplying amount of whole converting process rising 2%-10%.
(0%-3%) finely tuned to actual nickel content in the tapping back.
The present invention has advantage and effect:
(1) realizes the low application of the nickel pig iron in converter steelmaking process, help reducing the cost of alloy of nickel content at the 0.10-0.50% steel grade;
Can practice thrift the steel scrap resource when (2) adopting the low nickel pig iron to carry out alloying in the converter; (3) this technology can be utilized existing tooling device, need not to increase newly investment, can obviously reduce smelting cost.
Embodiment
Embodiment 1
Certain steel mill carries out pipe line steel X70 and smelts, and the converter nominal capacity is 100 tons (average taps), and operational path is " converter smelting-ladle furnace refining-RH refining-continuous casting "; Produce 2 stoves, target nickel content 0.15%, 6.45 tons of the low every stove add-ons of the nickel pig iron (nickeliferous 1.68%); The adding of scattering of 14 tons in the every stove of steel scrap, both mixing, 95 tons of back hot metal chargings; Converting process is normal, oxygen supply intensity 3.5Nm
3/ t ﹒ min, lime consumes 56kg/t, basicity of slag 3.2, converter terminal nickel content 0.11% and 0.10%; Wherein to bring nickel into be 0.01% to steel scrap, and the every stove in tapping back adds the 40kg electrolytic nickel, and final finished nickel content is 0.15% and 0.14%; Phosphorus content is 0.008% and 0.007%, and sulphur content is that 0.008% and 0.010%, two stove composition is qualified; Ni specific absorption in the low nickel pig iron reaches 97.2%, and the conventional smelting consumption of oxygen-supplying amount rises 4%, and net result satisfies product requirement.
Embodiment 2
Certain steel mill carries out high-strength steel Q690 and smelts, and the converter nominal capacity is 200 tons (average taps), and operational path is " converter smelting-ladle furnace refining-RH refining-continuous casting "; Produce 4 stoves; Target nickel content 0.20%, 20 tons of the low average every stove add-ons of the nickel pig iron (nickeliferous 2.0%), 16 tons in the average every stove of steel scrap; Not having other nickel-containing alloys adds; Go into the stokehold and add earlier the 20% low nickel pig iron and 4 tons of steel scraps, converted to add again behind 190 tons of the molten iron and remain the low nickel pig iron and 12 tons of steel scraps of 80%, oxygen supply intensity 3.6 Nm
3/ t ﹒ min, lime consumes 57.5kg/t, basicity of slag 3.5; Final finished nickel content two stoves 0.19% and two stoves 0.20%, phosphorus content is 0.008%, 0.009%, 0.008% and 0.010%, sulphur content is 0.008%, 0.010%, 0.008% and 0.010%; 4 stove compositions are qualified; Ni specific absorption in the low nickel pig iron reaches 97.5%, and the conventional smelting consumption of oxygen-supplying amount rises 3%, and net result satisfies product requirement.
Claims (1)
1. adopt low nickel pig iron smelting to contain the method for nickel steel in a converter, it is characterized in that the technical parameter of controlling in the technology is:
Low nickel pig iron proportional quantity calculates according to actual nickel content in the low nickel pig iron and specific absorption 99%;
Furnace charge constitutes: molten iron, steel scrap and the low nickel pig iron, and the wherein low nickel pig iron and steel scrap sum are 50-260kg/t; Low nickel pig iron add-on adds with steel scrap, and will mix the adding of scattering with steel scrap when 10-65kg/t, prevents to concentrate on local gathering the in the steel scrap hopper; During add-on 65-260kg/t, add the low nickel pig iron and steel scrap behind the then first hot metal charging, perhaps add earlier and be not more than 25% the low nickel pig iron and steel scrap, hot metal charging adds afterwards more again;
Ratio in 1.05 ~ 1.10:1 behind the low nickel pig iron of employing reduces adding amount of scrap steel;
Bessemerize in the process, oxygen supply intensity is at 2.5-4.0Nm
3In/t ﹒ min the scope, the time of 1/3-1/4 is taked 2.5-3.0 Nm before the blowing
3Blow in the oxygen supply intensity scope of/t ﹒ min, and increase 2-5kg/t lime assurance basicity of slag between 2.8-4.0; The blowing later stage is adopted high oxygen supply intensity 3.0-4.0Nm
3/ t ﹒ min blows, and guarantees that the ultimate constituent is even, and phosphorus content is controlled between the 0.006%-0.020% in the molten steel, and sulphur content is controlled between the 0.005%-0.020% in the molten steel, whole converting process oxygen-supplying amount rising 2%-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103006922A CN102808061B (en) | 2012-08-22 | 2012-08-22 | Method for smelting nickel-containing steel by using low-nickel pig iron in converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103006922A CN102808061B (en) | 2012-08-22 | 2012-08-22 | Method for smelting nickel-containing steel by using low-nickel pig iron in converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102808061A true CN102808061A (en) | 2012-12-05 |
| CN102808061B CN102808061B (en) | 2013-11-27 |
Family
ID=47231930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103006922A Active CN102808061B (en) | 2012-08-22 | 2012-08-22 | Method for smelting nickel-containing steel by using low-nickel pig iron in converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102808061B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014498A (en) * | 2012-12-21 | 2013-04-03 | 首钢总公司 | 355MPa low-welding-crack-sensitivity steel plate and producing method |
| CN103045790A (en) * | 2012-12-24 | 2013-04-17 | 河北节能耐火材料集团有限公司 | Nickel-containing steel production process |
| CN103146983A (en) * | 2013-03-18 | 2013-06-12 | 莱芜钢铁集团有限公司 | Method for producing nickel-containing steel by utilizing crude nickel-iron |
| CN103642978A (en) * | 2013-12-09 | 2014-03-19 | 莱芜钢铁集团有限公司 | Method for smelting nickel-containing steel in short process by utilizing electric furnace |
| CN105256094A (en) * | 2015-10-23 | 2016-01-20 | 首钢京唐钢铁联合有限责任公司 | Method for smelting weathering resistant steel |
| CN113088789A (en) * | 2021-03-12 | 2021-07-09 | 河钢股份有限公司承德分公司 | Method for smelting nickel-containing steel by using nickel-containing pig iron |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4474605A (en) * | 1981-03-03 | 1984-10-02 | Sumitomo Metal Industries, Ltd. | Process for refining high-chromium steels |
| CN101323898A (en) * | 2008-07-28 | 2008-12-17 | 红河恒昊矿业股份有限公司 | Oxygen one-step impurity removing refining method for raw ferro nickel |
| CN101497971A (en) * | 2008-10-31 | 2009-08-05 | 湖南华菱湘潭钢铁有限公司 | High-strength hardened and tempered steel and production method thereof |
| CN102199725A (en) * | 2011-05-13 | 2011-09-28 | 莱芜钢铁集团有限公司 | Bridge structural steel and production method thereof |
| CN102220453A (en) * | 2011-06-22 | 2011-10-19 | 攀钢集团有限公司 | Dephosphorization method of semi-steel |
| CN102312035A (en) * | 2011-07-07 | 2012-01-11 | 山西太钢不锈钢股份有限公司 | Smelting method for producing high strength weathering steel by use of chromium-nickel pig iron |
| CN102373383A (en) * | 2011-10-30 | 2012-03-14 | 山西太钢不锈钢股份有限公司 | X70 pipeline steel hot rolled coil and manufacture method thereof |
-
2012
- 2012-08-22 CN CN2012103006922A patent/CN102808061B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4474605A (en) * | 1981-03-03 | 1984-10-02 | Sumitomo Metal Industries, Ltd. | Process for refining high-chromium steels |
| CN101323898A (en) * | 2008-07-28 | 2008-12-17 | 红河恒昊矿业股份有限公司 | Oxygen one-step impurity removing refining method for raw ferro nickel |
| CN101497971A (en) * | 2008-10-31 | 2009-08-05 | 湖南华菱湘潭钢铁有限公司 | High-strength hardened and tempered steel and production method thereof |
| CN102199725A (en) * | 2011-05-13 | 2011-09-28 | 莱芜钢铁集团有限公司 | Bridge structural steel and production method thereof |
| CN102220453A (en) * | 2011-06-22 | 2011-10-19 | 攀钢集团有限公司 | Dephosphorization method of semi-steel |
| CN102312035A (en) * | 2011-07-07 | 2012-01-11 | 山西太钢不锈钢股份有限公司 | Smelting method for producing high strength weathering steel by use of chromium-nickel pig iron |
| CN102373383A (en) * | 2011-10-30 | 2012-03-14 | 山西太钢不锈钢股份有限公司 | X70 pipeline steel hot rolled coil and manufacture method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014498A (en) * | 2012-12-21 | 2013-04-03 | 首钢总公司 | 355MPa low-welding-crack-sensitivity steel plate and producing method |
| CN103045790A (en) * | 2012-12-24 | 2013-04-17 | 河北节能耐火材料集团有限公司 | Nickel-containing steel production process |
| CN103045790B (en) * | 2012-12-24 | 2016-06-22 | 河北节能耐火材料集团有限公司 | Containing nickel steel production technology |
| CN103146983A (en) * | 2013-03-18 | 2013-06-12 | 莱芜钢铁集团有限公司 | Method for producing nickel-containing steel by utilizing crude nickel-iron |
| CN103146983B (en) * | 2013-03-18 | 2016-03-23 | 莱芜钢铁集团有限公司 | A kind of method utilizing the production of thick ferronickel to contain nickel steel |
| CN103642978A (en) * | 2013-12-09 | 2014-03-19 | 莱芜钢铁集团有限公司 | Method for smelting nickel-containing steel in short process by utilizing electric furnace |
| CN105256094A (en) * | 2015-10-23 | 2016-01-20 | 首钢京唐钢铁联合有限责任公司 | Method for smelting weathering resistant steel |
| CN113088789A (en) * | 2021-03-12 | 2021-07-09 | 河钢股份有限公司承德分公司 | Method for smelting nickel-containing steel by using nickel-containing pig iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102808061B (en) | 2013-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102808061B (en) | Method for smelting nickel-containing steel by using low-nickel pig iron in converter | |
| CN103194564B (en) | Process for producing ultra-low phosphorus steel | |
| CN102828098A (en) | Method for increasing molten steel finishing point manganese content by adding manganese ore outside furnace | |
| CN106544467B (en) | A kind of high alloy Low-phosphorus Steel method in high molten iron proportion electric furnace smelting | |
| CN103572001B (en) | Method for controlling alkalinity of ultra-low-sulfur steel LF (ladle furnace) slag | |
| CN102134629A (en) | Smelting method for low-silicon ultralow-sulphur steel | |
| CN103614607B (en) | A kind of method of hot copper ashes melting and reducing stainless steel raw material under nickel-containing material effect | |
| CN101748236B (en) | Method for controlling titanium component content in molten steel | |
| CN105063265A (en) | Method for recarburizing No.45 steel by means of low-sulfur molten iron | |
| CN109022664A (en) | A method of Ti-IF steel is smelted using hot metal containing V-Ti | |
| CN102168160A (en) | Converter steelmaking technology for directly reducing-alloying manganese ore | |
| CN104313309A (en) | Technology and system for producing stainless steel by submerged arc furnace and AOD furnace duplex process | |
| CN103642971A (en) | Method for improving steelmaking end-point carbon content of semisteel and semisteel steelmaking method | |
| CN101469391B (en) | Ni-containing stainless steel smelting method | |
| CN101619377B (en) | Deslagging and dephosphorizing method of electric stove | |
| CN104004882A (en) | Method of semisteel silicon increasing processing and method of semisteel converter steelmaking | |
| CN103602781A (en) | Method for lowering chrome oxide in arc furnace slag in stainless steel smelting process | |
| CN103388099A (en) | Method for smelting austenite stainless steel by using dephosphorized molten iron | |
| CN103484600A (en) | Anti-RH (Relative Humidity) resulfurization technology for ultralow-sulfur moderate-thickness plate steel in high-sulfur molten steel smelting | |
| CN103642966A (en) | Method for improving high-carbon high-manganese steel converter smelting endpoint carbon content and steelmaking method | |
| CN204265815U (en) | Mineral hot furnace and AOD furnace duplex practice stainless steel production system | |
| CN103643056A (en) | Smelting method of low-carbon ferromanganese | |
| CN109022670A (en) | A kind of converter steel making method producing ultra-low phosphoretic steel | |
| CN104328240A (en) | Method for smelting high-carbon and low-phosphorus steel by adopting converter | |
| CN103643094A (en) | Smelting method of high-carbon ferromanganese |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee after: Shougang Group Co. Ltd. Patentee after: Qinhuangdao Shouqin Metal Material Co., Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Capital Iron & Steel General Company Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190521 Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Shougang Group Co. Ltd. Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |