CN1020116C - Electric furnace steelmaking method capable of reducing manganese from mangamese-containing ore - Google Patents
Electric furnace steelmaking method capable of reducing manganese from mangamese-containing ore Download PDFInfo
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- CN1020116C CN1020116C CN90105312A CN90105312A CN1020116C CN 1020116 C CN1020116 C CN 1020116C CN 90105312 A CN90105312 A CN 90105312A CN 90105312 A CN90105312 A CN 90105312A CN 1020116 C CN1020116 C CN 1020116C
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- manganese
- electric furnace
- making method
- steel making
- containing manganese
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to electric furnace steel making, particularly to an electric furnace steel making method in which manganese is reduced from ores containing manganese. The electric furnace steel making method is suitable for smelting alloy steel containing manganese by using an electric furnace (a rotary furnace, an open hearth furnace or an induction furnace). In the electric furnace steel making method, the production procedures are simple, and the ores containing manganese are directly put in the electric furnace for reducing manganese without being processed through the procedures, such as agglomeration, prereduction, etc. For example, ores containing manganese added to 20 of manganese-silicon alloy steel smelted according to a GB standard with the electric furnace steel making method are rhodochrosite, and the average recovery rate of manganese reaches 97%. When the electric furnace steel making method is compared with an original technology, the power consumption is not increased, the smelting time is not prolonged, and all finished product materials are qualified. Through the certification of production practice, favorable technical and economic benefits can be obtained by using the electric furnace steel making method to smelting alloy steel containing manganese.
Description
The present invention relates in electric arc furnace with containing the method that manganese ore carries out alloying of manganese, be applicable to that electric furnace (or converter, open hearth, induction furnace) is smelted and contain manganese alloy steel.
In the prior art, play the oxygenant effect containing manganese ore as steelmaking feed, or containing the raw material of manganese ore as ferromanganese smelting, the rate of recovery of its manganese is less than 65%, in recent years, utilize the technology of oxide compound DIRECT ALLOYING method alloy smelting steel to receive the concern on metallurgical boundary day by day, the carbon containing prereduction manganese nodule (or pelletizing) that will contain manganese sinter or prereduction degree and be 68-78% drops into and carries out DIRECT ALLOYING in the electric furnace and smelt the commerical test and the research that contain manganese alloy steel and succeed, and the rate of recovery of manganese reaches more than 95%.Units such as Shanghai Polytechnic Univ drop into carbon containing prereduction manganese nodule at 1.5 tons of electric furnaces, and (the ferrous metal rate is greater than 95%, manganese metal rate 5-7%) type approval test that replaces the part manganeseirom to smelt the ZGMn steel as the alloying furnace charge with oxidation style is obtained good effect, the rate of recovery of manganese is greater than 95%, the characteristics of this technology: after steel scrap melts clearly, carbon containing prereduction manganese nodule is made carbide slag in a collection of input of reduction period molten bath, add ferromanganese after slag is white and adjust composition, the temperature adjustment tapping, its weak point is a carbon containing prereduction manganese nodule production process complexity, contain manganese ore through levigate, selected, after adding operations such as carbon dust agglomeration, enter equipment such as tunnel furnace 1150-1200 ℃ of prereduction roasting more than 2 hours, it is simple to explore a kind of production process, smelts with containing method that manganese ore directly carries out alloying of manganese that to contain manganese alloy steel very necessary in electric arc furnace.
The objective of the invention is to avoid above-mentioned weak point of the prior art and provide a kind of need not (or make operations such as ball, prereduction and directly drop into the method that electric furnace carries out alloying of manganese through agglomeration containing manganese ore.
Purpose of the present invention can reach by following measure.
The present invention is that a kind of using in electric arc furnace contains the method that manganese ore directly carries out alloying of manganese, it is characterized in that: after (1) melts clearly, enter specification at (P), promptly (P)≤0.02%(C) is near specification, when bath temperature reaches more than 1450 ℃, remove all and take off (P) slag, once drop into average grade then greater than 20% the manganese ore that contains, (2) continue oxygen blast and take off (C), when (C) enters the specification lower limit, bath temperature is sprinkled into carbon dust and reduces during near tapping temperature, and oxidation sludge becomes whole wine after through reduction.
With containing the method that manganese ore directly carries out alloying of manganese, the manganese ore that contains that is adopted is rhodochrosite or other manganese oxide ore in electric arc furnace in the present invention.
The present invention will now be further detailed embodiment:
Adopt the present invention to smelt 100 tons of seven stove 20MnSi steel alloys, all produce, get the raw materials ready routinely by the GB1499-84 normal structure at 5 tons of electric furnaces (15 tons of capacity), contain manganese ore and adopt rhodochrosite, skim fettling routinely, the melting period oxygen blast is fluxed, molten clear back sampling thermometric, when bath temperature greater than 1450 ℃, phosphorus enters the specification lower limit, and (P≤0.02% o'clock is taken off full slag, drop into rhodochrosite, make new slag, continue oxygen blast, and anti-fluid stopping slag operation, when (C) enters the specification lower limit, bath temperature is during near tapping temperature, add carbon reducing agent, control adds the silica flour amount, the sampling of reduction end, tapping, oxidation sludge becomes finishing slag after reduction, production practice prove, adopt technological operation of the present invention stable, molten bath slag blanket good fluidity, the quantity of slag is few, manganese all enters specification, manganese recovery ratio is in the 95%-100% scope, and average recovery rate reaches 97%, compares with former technology, do not increase power consumption, do not prolong tap to tap time, the finished product wood property can be all qualified, adopts the present invention's smelting to contain manganese alloy steel and can obtain techno-economic effect preferably.
Claims (2)
1, a kind of using in electric arc furnace contains the method that manganese ore directly carries out alloying of manganese; It is characterized in that:
(1) after molten clear, enter specification at (P), promptly (P)≤0.02% (C) near specification, when bath temperature reaches more than 1450 ℃, removes all and takes off (P) slag, once drops into average grade then greater than 20% the manganese ore that contains.
(2) continue oxygen blast and take off (C), when (C) enters the specification lower limit, bath temperature is sprinkled into carbon dust and reduces during near tapping temperature, and oxidation sludge becomes finishing slag after through reduction.
2, a kind of using in electric arc furnace according to claim 1 contains the method that manganese ore directly carries out alloying of manganese; It is characterized in that the said manganese ore that contains is a rhodochrosite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90105312A CN1020116C (en) | 1990-06-15 | 1990-06-15 | Electric furnace steelmaking method capable of reducing manganese from mangamese-containing ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90105312A CN1020116C (en) | 1990-06-15 | 1990-06-15 | Electric furnace steelmaking method capable of reducing manganese from mangamese-containing ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057488A CN1057488A (en) | 1992-01-01 |
| CN1020116C true CN1020116C (en) | 1993-03-17 |
Family
ID=4879137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90105312A Expired - Fee Related CN1020116C (en) | 1990-06-15 | 1990-06-15 | Electric furnace steelmaking method capable of reducing manganese from mangamese-containing ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020116C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899604B (en) * | 2010-08-03 | 2012-04-04 | 武汉科技大学 | Direct alloying steelmaking process for manganese oxide composite briquettes used for re-blowing revolving furnace |
| CN102899452A (en) * | 2011-07-25 | 2013-01-30 | 王金忠 | Application of composite manganese ore powder in replacement of manganese alloy to carry out direct steelmaking |
| CN102952918B (en) * | 2012-11-25 | 2014-08-13 | 武钢集团昆明钢铁股份有限公司 | Smelting method for producing rich-manganous slags with blast furnace rich-manganous molten iron |
| CN102965464B (en) * | 2012-11-25 | 2013-12-18 | 武钢集团昆明钢铁股份有限公司 | Smelting method for producing manganese-rich slag by smelting and reduction of high-manganese liquid iron in electric furnace |
-
1990
- 1990-06-15 CN CN90105312A patent/CN1020116C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1057488A (en) | 1992-01-01 |
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