CN104017936A - Oxide steel-making method - Google Patents
Oxide steel-making method Download PDFInfo
- Publication number
- CN104017936A CN104017936A CN201410256427.8A CN201410256427A CN104017936A CN 104017936 A CN104017936 A CN 104017936A CN 201410256427 A CN201410256427 A CN 201410256427A CN 104017936 A CN104017936 A CN 104017936A
- Authority
- CN
- China
- Prior art keywords
- steel
- making
- iron
- gallium oxide
- gallium
- 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.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides an oxide steel-making method comprising the steps: in the process of discharging semi-steel from a steel ladle, adding 1.5-6.0kg/(a ton of semi-steel) of ferrosilicon into the steel ladle; adding a mixed material and a metal material for steel-making in an electric-arc furnace, wherein the mixed material is a mixture prepared by mixing gallium oxide and lime in a certain proportion; the metal material consists of molten iron in a molten state and a solid iron and steel material; on the basis of the total weight of the metal material, the content of the molten iron is between 50% and 60% in percentage by weight; the content of lime accounts for more than or equal to 25% of the total weight of the mixed material in percentage by weight. The oxide steel-making method is more simple and convenient in steel-making technological process, significantly-improved in product quality and gallium recovery rate, and relatively low in cost.
Description
Technical field
The present invention relates to alloy field of iron and steel smelting, relate in particular to a kind of method of gallium oxide electric-arc furnace steelmaking.
Background technology
China's gallium ore resources reserves are abundant, the traditional method of smelting containing gallium alloy steel is first gallium mining and metallurgy to be smelt to iron alloy, again iron alloy is added to molten steel interalloy, yet, there is the shortcomings such as high such as energy consumption, the gallium rate of recovery is low, environmental pollution is serious, labour intensity is large in traditional technical process, DIRECT ALLOYING steel-making in recent years just progressively causes research concern.But the producer that adopts at present gallium oxide DIRECT ALLOYING technology to smelt, generally usings steel scrap as raw material, the reduction reaction speed of gallium oxide is slower, and steel scrap still has the not reduction of a small amount of gallium when molten clear, smelting cycle is increased; If the add-on of gallium oxide is larger, when smelting, reaction fierceness, easily causes the boiling of slag; And the volatilization of more difficult control gallium in fusion process, causes the gallium rate of recovery to reduce, and therefore existing DIRECT ALLOYING technology is more common in and is smelted low gallium alloy steel, and comparatively rare for the report of high gallium alloy steel.China's scrap resources is nervous, and the cost of electric energy is very expensive again, the smelting technology of exploiting economy, and the add-on of expansion gallium oxide, the rate of recovery of raising gallium alloy element, the every technology, quality and the economic target that improve steel-making have important practical significance simultaneously.
Summary of the invention
The object of the invention is to, by optimizing burden composition, simplify technical process, improve the quality of products and the gallium rate of recovery, and the method is applicable to smelt the steel alloy of various gallium contents.
A kind of method that the invention provides oxide compound steel-making, it comprises the steps: in ladle, going out in the process of half steel, and the ferrosilicon of 1.5～6.0kg/ (t half steel) is joined to ladle; In electric arc furnace, add batch mixing and the metal charge for making steel, described batch mixing is gallium oxide and the mixture of lime with certain proportion mixing gained, described metal charge consists of molten iron and the solid iron and steel stock of molten state, wherein, gross weight based on metal charge, the content of molten iron is between 50wt%～60wt%, and the content of lime accounts for the proportion >=25wt% of the gross weight of batch mixing.
Further, described solid iron and steel stock is one or more in steel scrap, the pig iron, tank side, tank iron, slag steel and briquetting.
Further, described gallium oxide is one or more in gallium oxide powder, gallium oxide particle and gallium oxide piece.
Further, the weight ratio of batch mixing and metal charge is 1: 40～1: 80.
Further, in electric arc furnace, the control of the temperature of gallium oxide reduction reaction is 700 ℃～2000 ℃.
Further, when cloth, first add batch mixing to add again solid iron and steel stock to be finally blended into molten iron.
Further, the particle diameter≤70mm of described batch mixing.
The invention has the beneficial effects as follows, process for making flow process is easier, and quality product and the gallium rate of recovery significantly improve, and cost is lower.
Embodiment
Below in conjunction with embodiment, further describe the present invention, but the invention is not restricted to this.
A kind of method that the invention provides gallium oxide alloy steel-making, described method comprises: in ladle, going out in the process of half steel, the ferrosilicon of 1.5～6.0kg/ (t half steel) is joined to ladle; In electric arc furnace, add batch mixing and metal charge, described batch mixing is the mixture of gallium oxide and lime, and described metal charge consists of molten iron and solid iron and steel stock, wherein, the gross weight based on metal charge, the content of molten iron is between 50wt%～60wt%.According to the present invention, for the optimization of raw material mix, metal charge adopts liquid iron charging with part, to substitute the solid iron and steel stocks such as steel scrap.
The conventional molten iron of field of steel-making all contains the manganese of the carbon of 3% left and right, the silicon of 0.42% left and right and 0.50% left and right conventionally, these chemical compositions can provide enough reductive agents for reaction, therefore, the present invention does not need to add the reductive agents such as carbon dust or silicon carbide just can keep the reducing atmosphere in stove again.Molten iron is as a kind of purer metal charge, do not contain impurity element so much in steel scrap, the water evaporates of the physical thermal that molten iron brings in also can accelerating solid iron and steel stock, impel molten bath to form in advance, the CO gas that C-O reaction produces has the time more fully to remove obnoxious flavour and the inclusiones such as nitrogen, hydrogen, make the chemical composition in molten steel more stable, improve the quality of molten steel.According to embodiments of the invention, gallium oxide can together add in electric arc furnace by mode and the solid iron and steel stock mixing mutually with lime, and the effect of lime is to generate gallic acid calcium by being combined with gallium oxide, thus the volatilization of inhibited oxidation gallium, the rate of recovery of raising gallium.The present invention is when batch mixing, and the add-on of lime is not less than the 25wt% of the mixture total weight amount of gallium oxide and lime.
According to embodiments of the invention, gallium oxide and lime can first be broken into bulk, then proportionally take mechanically mixing, preferably, and the particle diameter≤50mm of batch mixing.Yet, the invention is not restricted to this, described batch mixing can be powdery, particle or bulk, and owing to containing partial oxidation calcium in gallium oxide, and the main component that calcium oxide is lime, so the actual add-on of lime also can slightly reduce.According to embodiments of the invention, batch mixing and metal charge are by weight within 1: 40～1: 80, feeding intake, the add-on of gallium oxide is determined by the gallium content of alloy smelting steel, the add-on of lime is adjusted according to the phosphorus content of molten iron and solid iron and steel stock, according to entering the high or low of stove metal charge phosphorus content, suitably increase or reduce the add-on of lime in batch mixing.Wherein, the gallium content of smelting steel grade can not impact the add-on of lime, because the needed amount of lime of dephosphorization and smelting slag making is much larger than the desired amount of lime of batch mixing, even if smelt high gallium steel, lime adding amount is also much larger than the target call of the 25wt% of batch mixing.
According to embodiments of the invention, the fusing point of gallium oxide only has 795 ℃, and molten iron temperature is general over 1200 ℃, after being blended into molten iron, add the heat that stays steel remaining slag operation savings in electric arc furnace, more than in stove, temperature can rise to gallium oxide fusing point fast, furnace temperature reaction over 700 ℃ can be carried out, so the meaning of electric arc furnace heating is only to make solid iron and steel stock to accelerate fusing.Electric arc furnace gallium oxide reduction reaction temperature of the present invention is preferably at 700 ℃～2000 ℃.According to embodiments of the invention, the batch mixing that can first add gallium oxide and lime, add again solid iron and steel stock to be finally blended into molten iron, this fusing and the slag making that is easy to lime by order of addition(of ingredients) light and heavy, first cool after heat, while molten iron also can accelerated reaction process to washing away, stirring of mixture in stove.If add batch mixing and solid iron and steel stock after being first blended into molten iron, due to the lower slagging that is difficult for of density of batch mixing, gallium oxide, dropping into the easily sharply scaling loss volatilization of moment of high temperature liquid iron, reduces the gallium rate of recovery.According to embodiments of the invention, described gallium oxide can be at least one in gallium oxide powder, gallium oxide particle and gallium oxide piece.Be preferably gallium oxide particle or gallium oxide piece, adopt gallium oxide powder can enlarge active surface, fast reaction speed, but should be noted the volatilization of controlling gallium oxide.
The present invention also provides a kind of steel-making waste water conditioner, comprises the raw material of following weight part: 25 parts of polyacrylamides, 15 parts, sodium hydroxide, 2 parts, sodium carbonate, 15 parts of magnesia powders, 10 parts of ferric sulfate of polymerized silica, 20 parts of quaternary ammonium salt lignin flocculants, 20 parts of sodium bentonites, 2 parts of Amino Trimethylene Phosphonic Acid, 5 parts, diethylene triamine pentacetic acid (DTPA) five sodium, 20 parts of poly aspartic acids, 12 parts of polymerize aluminum chlorides.Make steel the preparation method of waste water conditioner, comprise following preparation process: A, all the other raw materials except quaternary ammonium salt lignin flocculant, diethylene triamine pentacetic acid (DTPA) five sodium are added in container successively, stir; B, before coming into operation, add quaternary ammonium salt lignin flocculant, diethylene triamine pentacetic acid (DTPA) five sodium, stir 10 minutes; Make steel-making waste water conditioner.In sum, method of the present invention has been saved the operation of ferroalloy smelting, reduces the whole energy consumption of smelting the technical process of gallium alloy steel, improves resource utilization, thereby can reduce carrying capacity of environment, remarkable in economical benefits.The present invention can be applicable to low gallium alloy steel to the smelting of high gallium alloy steel, for smelting high gallium alloy steel, adopts method of the present invention can make the gallium rate of recovery reach more than 90% especially.
The above-mentioned foundation desirable embodiment of the present invention of take is enlightenment, and by above-mentioned description, relevant staff can, within not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to claim scope.
Claims (7)
1. a method for oxide compound steel-making, is characterized in that, described method comprises the steps:
In ladle, going out in the process of half steel, the ferrosilicon of 1.5～6.0kg/ (t half steel) is being joined to ladle;
In electric arc furnace, add batch mixing and the metal charge for making steel, described batch mixing is gallium oxide and the mixture of lime with certain proportion mixing gained, described metal charge consists of molten iron and the solid iron and steel stock of molten state, wherein, gross weight based on metal charge, the content of molten iron is between 50wt%～60wt%, and the content of lime accounts for the proportion >=25wt% of the gross weight of batch mixing.
2. the method for oxide compound steel-making as claimed in claim 1, is characterized in that, described solid iron and steel stock is one or more in steel scrap, the pig iron, tank iron, slag steel and briquetting.
3. the method for oxide compound steel-making as claimed in claim 1, is characterized in that, described gallium oxide is one or more in gallium oxide powder, gallium oxide particle and gallium oxide piece.
4. the method for oxide compound steel-making as claimed in claim 1, is characterized in that, the weight ratio of batch mixing and metal charge is 1: 40～1: 80.
5. the method for oxide compound steel-making as claimed in claim 1, is characterized in that, in electric arc furnace, the control of the temperature of gallium oxide reduction reaction is 700 ℃～2000 ℃.
6. the method for oxide compound steel-making as claimed in claim 1, is characterized in that, when cloth, first adds batch mixing to add solid iron and steel stock to be finally blended into molten iron again.
7. the method for oxide compound steel-making as claimed in claim 1, is characterized in that the particle diameter≤70mm of described batch mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410256427.8A CN104017936A (en) | 2014-06-10 | 2014-06-10 | Oxide steel-making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410256427.8A CN104017936A (en) | 2014-06-10 | 2014-06-10 | Oxide steel-making method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104017936A true CN104017936A (en) | 2014-09-03 |
Family
ID=51434928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410256427.8A Pending CN104017936A (en) | 2014-06-10 | 2014-06-10 | Oxide steel-making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104017936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998619A (en) * | 2018-08-21 | 2018-12-14 | 成渝钒钛科技有限公司 | A method of reducing the converter smelting period |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627851A (en) * | 2013-11-14 | 2014-03-12 | 攀钢集团研究院有限公司 | Semisteel steelmaking temperature control method and semisteel steelmaking method |
| CN103627846A (en) * | 2013-11-21 | 2014-03-12 | 莱芜钢铁集团有限公司 | Method for performing direct alloying to molybdenum oxide for steelmaking |
| CN103739098A (en) * | 2014-01-26 | 2014-04-23 | 河北工程大学 | Treatment agent of steelmaking waste water |
-
2014
- 2014-06-10 CN CN201410256427.8A patent/CN104017936A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627851A (en) * | 2013-11-14 | 2014-03-12 | 攀钢集团研究院有限公司 | Semisteel steelmaking temperature control method and semisteel steelmaking method |
| CN103627846A (en) * | 2013-11-21 | 2014-03-12 | 莱芜钢铁集团有限公司 | Method for performing direct alloying to molybdenum oxide for steelmaking |
| CN103739098A (en) * | 2014-01-26 | 2014-04-23 | 河北工程大学 | Treatment agent of steelmaking waste water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998619A (en) * | 2018-08-21 | 2018-12-14 | 成渝钒钛科技有限公司 | A method of reducing the converter smelting period |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100469932C (en) | V2O5 direct alloying steelmaking technology | |
| CN101724751B (en) | Method for smelting high vanadium ferrovanadium | |
| CN102828098A (en) | Method for increasing molten steel finishing point manganese content by adding manganese ore outside furnace | |
| CN103627842B (en) | Method for enhancing end point carbon content in smelting medium-carbon steel from semisteel and semisteel steelmaking method | |
| CN103789483B (en) | Method for smelting low-phosphorus steel by using semi-steel | |
| CN103469049A (en) | Technology for steel making by directly alloying molybdenum oxide | |
| CN105525055A (en) | Method for controlling splashing in less slag smelting decarbonization period of converter | |
| CN106086608B (en) | A kind of method that low-carbon manganese-silicon is produced using carbon manganese slag | |
| CN101775508A (en) | Production method of low-carbon ferromanganese | |
| CN105018670B (en) | The method for smelting rail steel as raw material with vanadium-bearing hot metal | |
| CN103627846B (en) | The method of molybdenum oxide DIRECT ALLOYING steel-making | |
| CN102766726A (en) | Method for smelting stainless steel by high-chrome melt and dephosphorized pre-melt | |
| CN102168160A (en) | Converter steelmaking technology for directly reducing-alloying manganese ore | |
| CN104195290A (en) | Molten steel dephosphorization agent and molten steel dephosphorization refining method | |
| CN103642971A (en) | Method for improving steelmaking end-point carbon content of semisteel and semisteel steelmaking method | |
| CN103643056B (en) | The smelting process of low carbon ferromanganese | |
| CN103642966B (en) | Method for improving high-carbon high-manganese steel converter smelting endpoint carbon content and steelmaking method | |
| CN105132611A (en) | Method for producing ultra-low phosphorous steel through single slag of converter | |
| CN104789732A (en) | Method for slagging in semisteel steelmaking converter | |
| CN102277471B (en) | Manufacturing method of steel | |
| CN104328243B (en) | Join carbon large power consumption control oxygen electrical furnace steelmaking process in right amount | |
| CN103643094B (en) | The smelting process of high carbon ferromanganese | |
| CN105506271B (en) | Chrome ore composite pellet and its production method and application are used in a kind of argon oxygen decarburizing furnace reduction | |
| CN111154934A (en) | Furnace burden structure ratio for adjusting blast furnace slag MgO | |
| CN103031409B (en) | Novel process of steelmaking deoxidization by utilizing precipitator dust of refining furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140903 |
|
| WD01 | Invention patent application deemed withdrawn after publication |