CN101693935A - Compound slag-forming constituent for converters - Google Patents
Compound slag-forming constituent for converters Download PDFInfo
- Publication number
- CN101693935A CN101693935A CN200910308948A CN200910308948A CN101693935A CN 101693935 A CN101693935 A CN 101693935A CN 200910308948 A CN200910308948 A CN 200910308948A CN 200910308948 A CN200910308948 A CN 200910308948A CN 101693935 A CN101693935 A CN 101693935A
- Authority
- CN
- China
- Prior art keywords
- slag
- ferric oxide
- converters
- forming constituent
- composite fluxing
- 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
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the type of metallurgy, in particular to a compound slag-forming constituent for converters, which are used for slag-forming during steel-making of the converters, and improve the smelting efficiency of the converters, the raw material component of the compound slag-forming constituent mainly comprises ferric oxide and manganese oxide, wherein compound slag-forming constituent comprises the following components in percentage by weight: 60%-80% of the ferric oxide, not more than 20% of the manganese oxide, and the other component is additive. The compound slag-forming constituent has the advantages that the content of FeO is high, and the content of MnO is low, which is more convenient for the initial stage slag-smelting of converters, simultaneously the loss of molten iron is reduced, since the compound slag-forming constituent adopts steel-making industrial waste which has low cost, and is difficult to recover, such as OG sludge, dust-removing powder, ferric oxide sheets and the like, as raw materials, the cost of products is low, and the compound slag-forming constituent is green, environment-friendly, and economical.
Description
Technical field
The present invention relates to metallurgical class, be specifically related to a kind of slag making when being used for converter steelmaking, to improve the composite fluxing medium for revolving furnace of converter smelting efficient.
Background technology
There is following problem in the converter current slag making: lime, light dolomite consumption are excessive, and the early stageization slag does not have enhancements, and the slag melting point height is reactive poor, cause the slag dephosphorizing capacity a little less than, the free CaO height of finishing slag, MgO supersaturation.
In the prior art, for example patent of invention ZL200510037631.1 converter highly effective metallurgical complexing agent for convertor and preparation method and application.Its shortcoming is the MnO too high levels, and the FeO content that CaO, MgO fusing needs most is too low, and it is slow to cause it to change slag speed, and cost is high again, does not reach the converter condition that early stage, quick slagging needed.Roll up in the 2nd phase " application of poor manganese ore in the converter steelmaking process " article in " steel-making " February the 20th in 2004 equally, only used the MnO of poor manganese ore, improved steel-making terminal point Mn content, and thoroughly do not solved the problem that the slag scarce capacity is changed in converter in earlier stage.The FeO that the early stageization slag needs most also needs the iron from Converter Oxigen Blowing oxidation molten iron and generates.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of composite fluxing medium for revolving furnace is provided, this composite fluxing medium is except that containing higher FeO, also contain a certain amount of MnO, wherein the content of FeO can thoroughly solve the weak problem of converter smelting initial stage slag ability greater than the content of MnO.
Why the present invention selects the content of the content of FeO greater than MnO, and its purpose is as follows: after converter was opened and blown, the at first oxidation of silicon in the molten iron and manganese removed in the first slag and contains SiO
2Outside MnO, also have the FeO that generates after the iron oxidation, mineral composition is with 2FeO.SiO
2And 2MnO.SiO
2Be main, the concentration of CaO is very low in the slag.Thereupon, acid first slag infiltrates to inside along lime block capillary fracture and space, and the permeating speed of FeO is very fast in the slag, is dissolved into the CaO intracell, and CaO dissolves thereupon, and the content of CaO improves in the slag.With the increase of CaO content in the slag, the SiO in the first slag
2To generate dystectic solid compounds 2CaO.SiO with CaO
2
2CaO.SiO
2Compact structure has stoped the infiltration of FeO to lime inside, and the dissolution rate of lime greatly reduces.Therefore, want to form fast the slag of high basicity good fluidity, should avoid 2CaO.SiO as far as possible
2The generation of shell, 2CaO.SiO perhaps takes measures to promote
2Dissolving.
Ferric oxide is the basic flux of converter slag, keeps higher iron oxide content in the slag at the blowing initial stage, can quicken the lime fusion, makes 2CaO.SiO
2Shell is loose, and other component is combined into low melting component and enters in the slag easily and in the slag.2CaO.SiO
2With 2FeO.SiO
2Effect can generate low-melting CaO.FeO.SiO
2(1223 ℃ of fusing points).In addition, in slag, add other oxide compound, as add a certain amount of MnO and can dwindle lime dissolved multi phase region.
The object of the invention realizes being finished by following technical scheme:
A kind of composite fluxing medium for revolving furnace, the material composition that it is characterized in that described composite fluxing medium mainly is made up of ferric oxide, manganese oxide, wherein the shared weight percent of ferric oxide is 60%-80%, and the shared weight percent of manganese oxide is no more than 20%, and all the other components are additive.
Described ferric oxide is the composition of iron protoxide and ferric oxide.
Described ferric oxide is to be mixed in the material composition with the form that the iron content weight percent is not less than 50% OG mud.
Described ferric oxide is to be mixed in the material composition with the form that the iron content weight percent is not less than 60% iron scale.
Described ferric oxide is to be mixed in the material composition with the form that the iron content weight percent is not less than 45% dust-removing powder.
Described manganese oxide is to be mixed into raw material to contain the form that the manganese weight percent is not less than 20% manganese ore powder.
Described additive is metallurgical glue or cement clinker or the combination of the two.
Advantage of the present invention is, in this composite fluxing medium, FeO content height, MnO content is low, more help converter initial stage slag, reduced the molten iron loss simultaneously, and since this composite fluxing medium adopt cheap, be difficult to reclaim as Steel industry wastes such as OG mud, dust-removing powder, iron scales as main raw material, make low cost product, accomplished green, environmental protection, economy.
Embodiment
By the following examples feature of the present invention and other correlated characteristic are described in further detail, so that technician's of the same trade understanding:
The weight percent of iron is 53% in the OG mud in the following example, and the weight percent of iron is 65% in the iron scale, and the weight percent of iron is 50% in the dust-removing powder, and the content of MnO is 40% in the manganese ore.All per-cents all are weight percentage.
1, ferric oxide 60% specific embodiment (table 1)
| OG mud | Iron scale | Dust-removing powder | Manganese ore | Metallurgical glue | Cement clinker |
| 75％ | 18％ | 4％ | 3％ | ||
| 66％ | 20％ | 4％ | 10％ | ||
| 80％ | 10％ | 4％ | 6％ |
2, ferric oxide 61% specific embodiment (table 2)
| OG mud | Iron scale | Dust-removing powder | Manganese ore | Metallurgical glue | Cement clinker |
| 73％ | 20％ | 4％ | 3％ | ||
| 64％ | 20％ | 4％ | 12％ | ||
| 77％ | 13％ | 4％ | 6％ |
3, ferric oxide 65% specific embodiment (table 3)
| OG mud | Iron scale | Dust-removing powder | Manganese ore | Metallurgical glue | Cement clinker |
| 80％ | 10％ | 4％ | 6％ | ||
| 70％ | 20％ | 4％ | 6％ | ||
| 85％ | 10％ | 5％ | 0％ |
4, ferric oxide 70% specific embodiment (table 4)
| OG mud | Iron scale | Dust-removing powder | Manganese ore | Metallurgical glue | Cement clinker |
| 87％ | 8％ | 5％ | 0％ | ||
| 77％ | 13％ | 4％ | 6％ | ||
| 92％ | 4％ | 4％ | 0％ |
5, ferric oxide 75% specific embodiment (table 5)
| OG mud | Iron scale | Dust-removing powder | Manganese ore | Metallurgical glue | Cement clinker |
| 92％ | 4％ | 4％ | |||
| 82％ | 10％ | 4％ | 4％ | ||
| ％ | ％ | ％ | ％ |
6, ferric oxide 80% specific embodiment (table 6)
| OG mud | Iron scale | Dust-removing powder | Manganese ore | Metallurgical glue | Cement clinker |
| ％ | ??％ | ??％ | ??％ | ||
| 90％ | ??6％ | ??4％ | ??0％ | ||
| ％ | ??％ | ??％ | ??％ |
The moulding process of the foregoing description is: A. prepares raw material: the granularity of various materials is less than 10mm; B. metering: carry out each component metering by weight percentage; C. mixing: earlier OG mud or dust-removing powder or iron scale, manganese ore, cement clinker are stirred, add metallurgical glue and suitable quantity of water then and continue to stir; D. pressure ball: granularity 20 ~ 60mm; E. oven dry: moisture is less than 0.5%; F. pack.
The result of use of the foregoing description is: (table 7)
| Embodiment | 300 tons of total add-ons of converter (t) | Mn content (%) in the endpoint molten steel | Total slag charge add-on (t) | Total oxygen-supplying amount (M 3) | P content (%) in the endpoint molten steel |
| 1 | 3 | 0.105 | 17.95 | 14656 | 0.0127 |
| 2 | 3 | 0.107 | 18.01 | 14679 | 0.0119 |
| 3 | 3 | 0.110 | 18.04 | 14694 | 0.0129 |
| 4 | 3 | 0.105 | 17.86 | 14706 | 0.0130 |
| 5 | 3 | 0.100 | 18.04 | 14894 | 0.0128 |
| 6 | 3 | 0.109 | 17.76 | 14678 | 0.0121 |
| 5 #Stove 11 months | 0 | 0.095 | 19.34 | 15094 | 0.0131 |
Composite fluxing medium of the present invention adds with lime and light dolomite before the converter smelting oxygen blast, can avoid the splash that causes because of misoperation.Can also replace iron ore masonry refrigerant to use.Using this composite fluxing medium during converter smelting, is example with 300 tons of converters, and it is about 12% that the total quantity of slag of every stove reduces, and more than the few 30kg of iron loss, blowing oxygen quantity reduces 400m
3, the residual manganese of endpoint molten steel improves 0.018% approximately, and terminal point P decreases.Also can reduce finishing slag free oxidation calcium contents, improve the integrated metallurgical effect of converter, reduce environmental pollution and reduced production cost.
This composite fluxing medium belongs to the trade waste comprehensive utilization, and technology is reliable, and cost is low, and interests are considerable.
Claims (7)
1. composite fluxing medium for revolving furnace, the material composition that it is characterized in that described composite fluxing medium mainly is made up of ferric oxide, manganese oxide, wherein the shared weight percent of ferric oxide is 60%-80%, and the shared weight percent of manganese oxide is no more than 20%, and all the other components are additive.
2. a kind of composite fluxing medium for revolving furnace according to claim 1 is characterized in that described ferric oxide is the composition of iron protoxide and ferric oxide.
3. a kind of composite fluxing medium for revolving furnace according to claim 1 is characterized in that described ferric oxide is to be mixed in the material composition with the form that the iron content weight percent is not less than 50% OG mud.
4. a kind of composite fluxing medium for revolving furnace according to claim 1 is characterized in that described ferric oxide is to be mixed in the material composition with the form that the iron content weight percent is not less than 60% iron scale.
5. a kind of composite fluxing medium for revolving furnace according to claim 1 is characterized in that described ferric oxide is to be mixed in the material composition with the form that the iron content weight percent is not less than 45% dust-removing powder.
6. a kind of composite fluxing medium for revolving furnace according to claim 1 is characterized in that described manganese oxide is to be mixed into raw material to contain the form that the manganese weight percent is not less than 20% manganese ore powder.
7. a kind of composite fluxing medium for revolving furnace according to claim 1 is characterized in that described additive is metallurgical glue or cement clinker or the combination of the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910308948A CN101693935A (en) | 2009-10-28 | 2009-10-28 | Compound slag-forming constituent for converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910308948A CN101693935A (en) | 2009-10-28 | 2009-10-28 | Compound slag-forming constituent for converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101693935A true CN101693935A (en) | 2010-04-14 |
Family
ID=42092931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910308948A Pending CN101693935A (en) | 2009-10-28 | 2009-10-28 | Compound slag-forming constituent for converters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101693935A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104694700A (en) * | 2015-03-16 | 2015-06-10 | 攀钢集团研究院有限公司 | Slag state regulator for extracting vanadium and chromium from high-silicon molten iron through converter and preparation method thereof |
-
2009
- 2009-10-28 CN CN200910308948A patent/CN101693935A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104694700A (en) * | 2015-03-16 | 2015-06-10 | 攀钢集团研究院有限公司 | Slag state regulator for extracting vanadium and chromium from high-silicon molten iron through converter and preparation method thereof |
| CN104694700B (en) * | 2015-03-16 | 2016-10-05 | 攀钢集团研究院有限公司 | A kind of high-silicon molten iron vanadium extraction by converter blowing chromium slag state regulator and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101775451B (en) | Blast-furnace smelting method for vanadium titano-magnetite | |
| CN100507013C (en) | Method for directly producing ferrochromium from chrome ore powder and coal | |
| CN102296141B (en) | Converter steelmaking final slag modifier and use method thereof | |
| CN102912068B (en) | Slagging agent for semisteel converter steelmaking and manufacturing method thereof | |
| CN103498016B (en) | Dephosphorization agent prepared by taking slag of decarbonization furnace as raw material and molten iron dephosphorization method | |
| CN102264919A (en) | Method for reclaiming iron and phosphorus from steelmaking slag | |
| CN101560586B (en) | Compound dephosphorization agent with converter slag as raw material and preparing method thereof | |
| CN102732680A (en) | Pre-smelting type iron calcium aluminate complex dreg dephosphorizing agent as well as preparation and application methods thereof | |
| CN102827990A (en) | Fluoride-free slagging medium for use in converter and preparation method thereof | |
| CN101671756B (en) | Composite fluxing medium for revolving furnace | |
| CN103451355B (en) | Production technology of composite slagging agent for steelmaking | |
| CN103031401B (en) | Method for converter steelmaking by LF (Ladle Furnace) refining furnace reducing slag | |
| CN104789732B (en) | The method of semi-steel making converter slag-making | |
| CN103484596B (en) | Half steel slag former and preparation method thereof and Semi-steel making method | |
| CN102839252B (en) | Converter slag fluoride-free fusing agents and method for producing the same | |
| CN103014237B (en) | Dephosphorization slag forming constituent and production method thereof | |
| CN111139332B (en) | Slag former and light and thin scrap steel mixed processing furnace entering process | |
| CN101532071B (en) | Converter dephosphorization complex slag former and slagging technology | |
| CN102146500A (en) | Fluxing agent for smelting steel as well as preparation and use methods thereof | |
| CN108220529A (en) | It is a kind of using sintering machine head end electro-precipitating dust as the desiliconization of hot metal agent of matrix | |
| CN1041328C (en) | Method of direct steel-smelting of cooled agglomerated pellet | |
| CN101693935A (en) | Compound slag-forming constituent for converters | |
| CN102943146A (en) | Steel smelting slagging method, steel smelting method and slagging material | |
| CN103031409A (en) | Novel process of steelmaking deoxidization by utilizing precipitator dust of refining furnace | |
| CN112695155A (en) | Steelmaking process of molten iron containing vanadium and titanium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100414 |