CN1271779A - Multi-element compound Mn-series deoxidizer for deoxidizing and alloying in smelting steel - Google Patents
Multi-element compound Mn-series deoxidizer for deoxidizing and alloying in smelting steel Download PDFInfo
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- CN1271779A CN1271779A CN 00107645 CN00107645A CN1271779A CN 1271779 A CN1271779 A CN 1271779A CN 00107645 CN00107645 CN 00107645 CN 00107645 A CN00107645 A CN 00107645A CN 1271779 A CN1271779 A CN 1271779A
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Abstract
A multi-element compound deoxidizer for deoxidization and alloying in the smelting steel field features strong deoxidizing action and one-step alloying, and contains Mn (60-68 wt.%), Si (13-20), Al (0.3-1.98), C (less than 2.5), P (less than 0.25), S (less than 0.04) and Fe (the rest). Its advantages are low oxygen activity in molten steel, easily removing the deoxiding resultant for conticast, high utilization rate of Si, Mn and Al, and low cost.
Description
The present invention relates to make steel manganese series multi-element composite deoxidant with deoxidation and alloying.Be applicable to most steel grades that various method for making steel is produced, for example carbon steel, steel alloy, alloy tool steel etc.
Making steel traditional deoxidation alloying process, is to adopt ferrosilicon, ferromanganese, silicomanganese etc. to give deoxidation, carries out final deoxygenation with aluminium then.Owing to costing an arm and a leg of aluminium, its deoxidation products (Al2O3 etc.) difficult come-up in molten steel is removed, and light specific gravity, the fusing point of aluminium are low simultaneously, so adding is difficult, loss is big, cause steel-making cost to raise problems such as quality instability so inevitably.In recent years, be used for final deoxygenation though develop multiple composite deoxidant (as alloys such as ferrosilicoaluminum, Si-Al-Ba-Fes).Though deoxidation effect increases, the problem that its manufacturing cost is higher, deoxidization technique is loaded down with trivial details is still failed fine solution, and to reducing the DeGrain of steel making working procedure cost, quality also is difficult for guaranteeing.
The object of the present invention is to provide a kind of steel-making to give deoxidation, final deoxygenation and alloying and once finish, its deoxidation products is easy to come-up and removes, and the alloying element rate of recovery is stable, and deoxidation effect is obvious.Be fit to the composite deoxidant that continuous casting requires, because this closes full low production cost, suitability is wide, thereby reaches the simplification process for making, reduces steel-making cost, saves the purpose of alloy resource.
Based on the foregoing invention purpose, reductor of the present invention concrete Chemical Composition be (weight %): Mn60-68, Si 13-20, Al 0.3-1.98, C≤2.5, P≤0.25, S≤0.04, surplus is Fe.
For the most steel kinds in the field of steel-making, manganese is as the important element of a kind of deoxidation and alloying and be used widely, so the saying of " no manganese is Cheng Gang not " is arranged.The main chemical compositions of the manganese series multi-element composite deoxidant that the present invention newly provides is a manganese element, compare with other composite deoxidant, its principal feature: 1, deoxidation, final deoxygenation are given in steel-making, alloying of manganese is disposable finishes, and need not add Mn series alloys such as ferromanganese in addition, has simplified steel-smelting production process.2, this alloy manufacturing process is simple, low production cost.3, alloy ratio is great, and fusing point is low, and belongs to polynary complex deoxidization, and its deoxidation effect is obvious, and alloy recovery is stable.4, suitability is wide, is applicable to the production of most of steel grade.
Aluminium content in the manganese series multi-element composite deoxidant of the present invention is to smelt how much preparing of steel grade and manganese content according to steel-making.Consider the use of most of steel grade and the economy of alloy production, its Al content not only can satisfy service requirements but also has economy between 0.5-3%.For steel grades such as some low-carbon (LC) carbon steel, AI content can transfer between the 3-7%, though contain the Al element among the present invention, is not to form with the metallic aluminium remelting fully.But mainly directly produce by the hot stove production technique in ore deposit (proportioning raw materials, slag system are selected and the isoparametric control of smelting temperature), save bauxite resource and had more economy.Silicon is the same with aluminium in this invention to belong to strong deoxidant element together, its deoxidizing capacity than aluminium a little less than but stronger than manganese.Simultaneously, because the existence of Mn, more can improve the deoxidizing capacity of Si, Al two elements, Si content between 13-20% (weight %), Al content height, then Si content capping; Otherwise Al content is low, and Si content then takes off limit.
Alloy of the present invention can adopt hot stove working system in ore deposit or remelting working system, be specially raw material is equipped with in proportion and be placed in the hot stove in ore deposit reducing and smelting and make, raw materials used manganese ore, rich manganese slag, silica, bauxitic clay, rhombspar, fluorite, the lime etc. of mainly containing, reductive agent is coal or coke, and the ton power consumption is about 5000KW.h/T.
Compared with prior art, the advantage of manganese series multi-element composite deoxidant of the present invention is: steel-making is given deoxidation, final deoxygenation and alloying and is once finished, its deoxidation products is easy to come-up and removes, the alloying element rate of recovery is stable, use the present invention in the 15t converter, to smelt 20MnSi killed steel, use silicomanganese and Si-Al-Ba-Fe to close full deoxidation with former technology and compare, its deoxidation effect is a little more than former technology.Its Mn recovery rate improves 2%, and the Si recovery rate improves 5%.Finished Steel composition, product performance all are up to state standards.Simplify the steel-making operating procedure simultaneously, be more conducive to production management of steelmaking, reduced steel-making cost, saved alloy resource.
Embodiment
According to the chemical ingredients of manganese series multi-element composite deoxidant of the present invention, prepared three batches of reductors of the present invention, its chemical ingredients sees Table 1.Three batches of alloy deoxidizers of the present invention that use preparation are at 15t converter smelting three stove 20MnSi killed steel, and the technical indicator of the consumption of its reductor and three stove steel sees Table 2.
The molten steel of being produced is successfully in 120 * 120 billet caster top castings success.
The alloy deoxidizer of embodiment preparation uses in the 15t converter steelmaking is produced in batches, and its result of use accomplishes the end in view.Table 1 manganese series multi-element composite deoxidant chemical ingredients (weight %)
The technical indicator of table 2 embodiment three stove steel and the add-on of reductor
Claims (1)
1, a kind of manganese series multi-element composite deoxidant that is used for deoxidation in steel making and alloying is characterized in that its concrete Chemical Composition is (weight %): Mn 60-68, and Si 13-20, Al 0.3-1.98, C≤2.5, P≤0.25, S≤0.04, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00107645 CN1271779A (en) | 2000-05-22 | 2000-05-22 | Multi-element compound Mn-series deoxidizer for deoxidizing and alloying in smelting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00107645 CN1271779A (en) | 2000-05-22 | 2000-05-22 | Multi-element compound Mn-series deoxidizer for deoxidizing and alloying in smelting steel |
Publications (1)
| Publication Number | Publication Date |
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| CN1271779A true CN1271779A (en) | 2000-11-01 |
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| CN 00107645 Pending CN1271779A (en) | 2000-05-22 | 2000-05-22 | Multi-element compound Mn-series deoxidizer for deoxidizing and alloying in smelting steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408701C (en) * | 2006-04-29 | 2008-08-06 | 危松林 | High-manganese low-carbon composite alloy and method for preparing same |
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2000
- 2000-05-22 CN CN 00107645 patent/CN1271779A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408701C (en) * | 2006-04-29 | 2008-08-06 | 危松林 | High-manganese low-carbon composite alloy and method for preparing same |
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