CN102925617B - Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter - Google Patents
Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter Download PDFInfo
- Publication number
- CN102925617B CN102925617B CN201210427546.6A CN201210427546A CN102925617B CN 102925617 B CN102925617 B CN 102925617B CN 201210427546 A CN201210427546 A CN 201210427546A CN 102925617 B CN102925617 B CN 102925617B
- Authority
- CN
- China
- Prior art keywords
- slag
- converter
- vanadium
- supplying agent
- splashing
- 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.)
- Active
Links
Abstract
The invention provides a slag adjusting agent for slag-splashing converter protection of a vanadium extracting converter. The slag adjusting agent comprises the chemical components by weight percentage: 20%-50% of C, 40%-72% of MgO, 4%-7% of CaO and H2O which is not greater than 3%. According to the slag adjusting agent for the slag-splashing converter protection of the vanadium extracting converter provided by the invention, the FeO in the vanadium slag can be effectively reduced, and the melting point and adhesivity of the modified vanadium slag can be improved, so that after the slag adjusting agent is used, the slag adhering effect can be improved when the slag-splashing converter protection is carried out by the vanadium slag, the anti-erosion property of the converter lining can be improved, and the service life of the converter lining of the vanadium extracting converter can be effectively prolonged.
Description
Technical field
The present invention relates to converter extracting vanadium Technology of Slag Splashingfor Furnace Maintenance field, be specifically related to a kind of slag supplying agent for converter extracting vanadium slag splashing.
Background technology
Converter is the main equipment that iron and steel enterprise produces, and its life-span is directly connected to the production cost of converter.In order to improve life of converter, the mid-90 in 20th century, first LTV company of the U.S. develops and adopts Technology of Slag Splashingfor Furnace Maintenance, has significantly improved converter lining life, is risen to 15658 heats of nineteen ninety-five by 6200 heats of nineteen ninety.Adopt after Technology of Slag Splashingfor Furnace Maintenance, the consumption of converter refractory materials reduces by 25%～50% left and right.Japan's converter lining life is not high, generally at 6000～8000 stoves.Under slag splashing condition, Wuhan Iron and Steel Plant is by the systematic study of converter long service life, and the highest furnace life reaches more than 30,000 stoves, and multiple blown converter the highest more than 10,000 stoves in age of Baosteel, generally at 6000～8000 stoves.
Protecting method with splash slag is divided into horizontal spray gun method, horizontal bottom blowing method, marksmanship of the vertical end, horizontal flame spraying, upright spray gun method etc.
What generally adopt at present, is vertical oxygen marksmanship.Its process characteristic is: utilize top blow oxygen lance to switch nitrogen, splash, through the finishing slag of modification, is coated in converter lining inwall.By the change of spray angle, can on purpose concentrate certain position of splash.Before blowing, add excessive rhombspar and lime, the erosion that has alleviated mutually furnace lining because of oversaturated magnesium oxide slag between the blowing process.In addition, foamy slag forms protective layer on furnace lining.Improving the bonding strength of spattering between slag blanket and backup lining brick the two, is the key of improving slag splashing effect.
Converter extracting vanadium is due to its production singularity, and its maintenance and long service life technical study are less, and particularly converter extracting vanadium Technology of Slag Splashingfor Furnace Maintenance has no report.Produce vanadium rate for improving as far as possible, extraction smelting of vanadium is stricter to Control for Kiln Temperature, conventionally can adopt the mode that adds part pig to carry out auxiliary temperature-reducing.So charging side is not only subject to the impact of molten iron, also to be subject to the impact of pig, because furnace temperature is low, it is block that slag is, and when blowing, together with molten iron, operational layer brick carried out to omnidistance rigid mechanical shock, therefore mechanical shock is the major cause of converter extracting vanadium converter bottom and body bottom damage.Different from steel-making converter, the vanadium slag fusing point that converter extracting vanadium is produced is low, high containing vanadium, low containing MgO, and dross difficulty while spattering slag, therefore needs vanadium slag to carry out modifying process.
In sum, need a kind of slag supplying agent that is applicable to converter extracting vanadium slag splashing badly.
Summary of the invention
The deficiency existing for prior art, one of object of the present invention is to provide a kind of slag supplying agent that can be applicable to converter extracting vanadium slag splashing.
The invention provides a kind of slag supplying agent for converter extracting vanadium slag splashing, the chemical composition of described slag supplying agent comprises by weight percentage: 20%～50% C, 40%～72% MgO, 4%～7% CaO and be not more than 3% H
2o.
In one exemplary embodiment of the present invention, described slag supplying agent can be mixed by the magnesia of predetermined amount, carbonaceous material and quickened lime.
In one exemplary embodiment of the present invention, the granularity of described magnesia, carbonaceous material and quickened lime is preferably all less than 5mm.
In one exemplary embodiment of the present invention, described carbonaceous material can be graphite, coke powder, pitch coke or hard coal.
In one exemplary embodiment of the present invention, in described magnesia, the weight percentage of MgO is preferably more than 90%.
Compared with prior art, the FeO that converter extracting vanadium slag splashing of the present invention can effectively reduce in vanadium slag with slag supplying agent, improve vanadium slag fusing point and adhesivity after upgrading, thereby use after this slag supplying agent, in the time adopting vanadium slag to carry out slag splashing, can improve dross effect, improve furnace lining erosion resistibility, effectively improve converter extracting vanadium lining life.
Embodiment
Hereinafter, describe the slag supplying agent for converter extracting vanadium slag splashing of the present invention in detail in connection with exemplary embodiment.
Contriver finds: in vanadium extraction by converter blowing technological process, because tap to tap time is short, temperature is low, in slag, eutectic mixture composition is few, slag fluidity is poor, and before arriving extraction smelting of vanadium terminal, in molten iron, C react inabundant expansion, P in furnace gas with O
cO, P
cO2lower, and P
o2higher, slag bad adhesion, causes magnesia carbon brick to be exposed in oxygen atmosphere, impels C and O
2reaction, the above lining erosion speed of iron liquid level is below iron liquid level.The above furnace lining of iron liquid level is by the mode repeated action that the direct decarburization of oxygen → loose embrittlement → erosion is peeled off → reoxidized substantially, and brick body is deteriorated gradually.
In view of the above-mentioned characteristic of converter extracting vanadium, the present invention proposes a kind of slag supplying agent of the slag splashing that is suitable for converter extracting vanadium.
In one exemplary embodiment of the present invention, comprise by weight percentage for the chemical composition of the slag supplying agent of converter extracting vanadium slag splashing: 20%～50% C, 40%～72% MgO, 4%～7% CaO, be not more than 3% H
2o and a small amount of impurity.Preferably, the chemical composition of described slag supplying agent is by weight percentage by 20%～50% C, 40%～72% MgO, 4%～7% CaO and be not more than 3% H
2o composition.Wherein, the effect of the C in slag supplying agent comprises: can, by the FeO reduction in vanadium slag, improve the adhesivity of vanadium slag; The effect of MgO in slag supplying agent comprises: can adjust the fusing point of vanadium slag, improve the heat impedance of spattering slag blanket; The effect of CaO in slag supplying agent comprises: the mobility that can regulate vanadium slag.
In the time that the C weight percentage in slag supplying agent exceedes 50%, the not only FeO in reducing slag of C in oxygen blast process, C oxidation simultaneously generates a large amount of heat, can make the vanadium slag after modification become liquid state, is unfavorable for spattering slag operation.Equally, when the C weight percentage in slag supplying agent is lower than 20% time, the shortage of heat that generates in oxygen blast process C oxidation, to FeO also commercial weight is inadequate, make the vanadium slag poor adhesion after modification, be also unfavorable for spattering slag operation.Therefore,, in slag supplying agent of the present invention, the weight percentage of C is 20%～50%.
In the time that the MgO weight percentage in slag supplying agent exceedes 72%, in the time that oxygen blast process is carried out vanadium slag modification, can make the vanadium slag fusing point after modification higher, slag mobility and poor adhesion, be unfavorable for spattering slag operation.Equally, when the MgO weight percentage in slag supplying agent is lower than 40% time, to the modified effect deficiency of vanadium slag, the fusing point of vanadium slag is still lower, spatter slag after slag blanket scour resistance poor, do not have the effect of protection furnace lining.Therefore,, in slag supplying agent of the present invention, the weight percentage of MgO is 40%～72%.
In the time that the CaO weight percentage in slag supplying agent exceedes 7%, can make the vanadium slag CaO content after modification higher, and the vanadium slag CaO content that causes the heat spattering after slag to produce is high, the recovery rate of vanadium when impact adopts vanadium slag to produce vanadium goods.Equally, when the CaO weight percentage in slag supplying agent is lower than 4% time, to the modified effect deficiency of vanadium slag, vanadium slag viscosity is poor, does not have the effect of protection furnace lining.Therefore,, in slag supplying agent of the present invention, the weight percentage of CaO is 4%～7%.
In slag supplying agent of the present invention, require H
2it is mainly to consider from security standpoint that O content is not more than 3%, as H in slag supplying agent
2when O content is excessive, there is the danger of splash, therefore, in slag supplying agent, contain H
2the amount of O is more few better.
In another exemplary embodiment of the present invention, for convenient batching, slag supplying agent can be mixed by the magnesia of predetermined amount, carbonaceous material and quickened lime.Preferably, in described magnesia, the weight percentage of MgO is greater than 90%.In addition, the granularity of magnesia, carbonaceous material and quickened lime is preferably all less than 5mm, and such benefit is: can be by material melts slagging in shorter oxygen blow duration, ensure that certain granularity can reduce blanking process dust generation simultaneously.But, the invention is not restricted to this, in the time forming according to the slag supplying agent of exemplary embodiments more of the present invention, the granularity of magnesia, carbonaceous material and quickened lime also can be greater than 5mm.Here, carbonaceous material can be graphite, coke powder, pitch coke or hard coal.Preferably, the simple substance carbon weight percentage in carbonaceous material is not less than 85%.
In another exemplary embodiment, the slag supplying agent for converter extracting vanadium slag splashing of the present invention also can be adopted with the following method and obtain:
Taking magnesia, carbonaceous material, quickened lime as raw material, each starting material are mixed by predetermined proportion, blending ratio is determined according to the grade of raw material, the slag supplying agent composition range obtaining is by weight percentage: C 20%～50%, MgO 40%～72%, CaO 4%～7%, H
2o < 3%.
Wherein, the MgO content in magnesia is greater than 90%, granularity < 5mm; Carbonaceous material can be graphite, coke powder, pitch coke, hard coal etc., and its carbon content should be not less than 85%, granularity < 5mm; Quickened lime is the conventional raw material of smelter, and its CaO content should be greater than 75%, granularity < 5mm.
In order to understand better above-mentioned exemplary embodiment of the present invention, be described further below in conjunction with concrete example.
Example 1
Using magnesia, graphite, quickened lime is raw material, and each starting material are mixed by a certain percentage, and slag supplying agent composition range is: C 20%, MgO 72%, CaO 6%, H
2o 2%.
Example 2
Using hard coal, the quickened lime that magnesia, carbon content are 96% is raw material, and each starting material are mixed by a certain percentage, and slag supplying agent composition range is: C 20%, MgO 70%, CaO 6%, H
2o 2%, and a small amount of impurity.
Example 3
Using MgO content is that 96% magnesia, graphite, quickened lime are raw material, and each starting material are mixed by a certain percentage, and slag supplying agent composition range is: C 48%, MgO 40%, CaO 7%, H
2o 3%, and a small amount of impurity.
Example 4
Using magnesia, carbonaceous material, quickened lime is raw material, and each starting material are mixed by a certain percentage, and slag supplying agent composition range is: C 40%, MgO 50%, CaO 7%, H
2o 3%.
Slag supplying agent of the present invention can improve vanadium slag fusing point and adhesivity effectively, spatters slag effect thereby strengthen, and is suitable for converter extracting vanadium.In addition, the present invention also has the advantages such as production method is simple, upgrading is effective.
Although described the present invention in conjunction with exemplary embodiment above, those of ordinary skill in the art should be clear, in the case of not departing from the spirit and scope of claim, can carry out various amendments to above-described embodiment.
Claims (5)
1. for a slag supplying agent for converter extracting vanadium slag splashing, it is characterized in that, the chemical composition of described slag supplying agent is C40%, MgO50%, CaO7% and H by weight percentage
2o3%; Or be C48%, MgO40%, CaO7%, H
2o3% and a small amount of impurity.
2. the slag supplying agent for converter extracting vanadium slag splashing according to claim 1, is characterized in that, described slag supplying agent is mixed by magnesia, carbonaceous material and the quickened lime of predetermined amount.
3. the slag supplying agent for converter extracting vanadium slag splashing according to claim 2, is characterized in that, the granularity of described magnesia, carbonaceous material and quickened lime is all less than 5mm.
4. the slag supplying agent for converter extracting vanadium slag splashing according to claim 2, is characterized in that, described carbonaceous material is graphite, coke powder, pitch coke or hard coal.
5. the slag supplying agent for converter extracting vanadium slag splashing according to claim 2, is characterized in that, in described magnesia, the weight percentage of MgO is greater than 90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210427546.6A CN102925617B (en) | 2012-10-31 | 2012-10-31 | Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210427546.6A CN102925617B (en) | 2012-10-31 | 2012-10-31 | Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102925617A CN102925617A (en) | 2013-02-13 |
| CN102925617B true CN102925617B (en) | 2014-12-17 |
Family
ID=47640540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210427546.6A Active CN102925617B (en) | 2012-10-31 | 2012-10-31 | Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102925617B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882177B (en) * | 2012-12-24 | 2016-01-06 | 攀钢冶金材料有限责任公司 | The method of converter extracting vanadium furnace retaining properties-correcting agent and preparation method thereof and furnace retaining |
| CN104060023B (en) * | 2013-09-09 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel-making final slag regulator and preparation method thereof and using method |
| CN103525971B (en) * | 2013-09-30 | 2015-01-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium slag modifier and preparation method thereof, and vanadium-extracting revolving furnace slag-splashing furnace-protecting method |
| CN104195283A (en) * | 2014-09-16 | 2014-12-10 | 攀钢集团西昌钢钒有限公司 | Vanadium slag modifier for converter vanadium extraction and converter vanadium extraction smelting method |
| CN104673962B (en) * | 2015-03-16 | 2017-02-22 | 攀钢集团研究院有限公司 | Slag state regulator for slag splashing protection of vanadium-chromium recovery converter |
| CN104694703B (en) * | 2015-03-16 | 2017-02-01 | 攀钢集团研究院有限公司 | Modifier for splashing slag furnace protecting for vanadium-chromium extracting converter |
| CN104673963B (en) * | 2015-03-16 | 2017-02-01 | 攀钢集团研究院有限公司 | Slag modifier for slag splashing protection of vanadium-chromium recovery converter |
| CN114015835A (en) * | 2021-09-22 | 2022-02-08 | 武安市裕华钢铁有限公司 | Novel iron-blending splashing preventing agent and using method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3470858B2 (en) * | 1997-03-05 | 2003-11-25 | Ｊｆｅスチール株式会社 | How to extend the life of converter body |
| CN101054611A (en) * | 2007-05-22 | 2007-10-17 | 江西华东实业有限公司 | Slag removing and furnace protecting agent |
| CN101177720A (en) * | 2007-12-17 | 2008-05-14 | 南京钢铁股份有限公司 | Slag splashing method for converter high-oxidisability furnace residue |
| CN101200772A (en) * | 2007-10-30 | 2008-06-18 | 攀枝花顺腾集团冶金材料有限公司 | Improved type slag splashing furnace protecting material and preparation method thereof |
| CN102127612A (en) * | 2011-02-15 | 2011-07-20 | 江苏大学 | Slag adjusting and furnace protecting method for controlling rising of converter bottom and furnace wall slag deposition |
| CN102424886A (en) * | 2011-12-31 | 2012-04-25 | 钢铁研究总院 | Furnace protection process for decarburization converter less slag splashing |
-
2012
- 2012-10-31 CN CN201210427546.6A patent/CN102925617B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3470858B2 (en) * | 1997-03-05 | 2003-11-25 | Ｊｆｅスチール株式会社 | How to extend the life of converter body |
| CN101054611A (en) * | 2007-05-22 | 2007-10-17 | 江西华东实业有限公司 | Slag removing and furnace protecting agent |
| CN101200772A (en) * | 2007-10-30 | 2008-06-18 | 攀枝花顺腾集团冶金材料有限公司 | Improved type slag splashing furnace protecting material and preparation method thereof |
| CN101177720A (en) * | 2007-12-17 | 2008-05-14 | 南京钢铁股份有限公司 | Slag splashing method for converter high-oxidisability furnace residue |
| CN102127612A (en) * | 2011-02-15 | 2011-07-20 | 江苏大学 | Slag adjusting and furnace protecting method for controlling rising of converter bottom and furnace wall slag deposition |
| CN102424886A (en) * | 2011-12-31 | 2012-04-25 | 钢铁研究总院 | Furnace protection process for decarburization converter less slag splashing |
Non-Patent Citations (1)
| Title |
|---|
| 冯捷等.复吹转炉溅渣护炉.《转炉炼钢生产》.冶金工业出版社,2006,第198页、第220页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102925617A (en) | 2013-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102925617B (en) | Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter | |
| CN102912070B (en) | Slag splashing furnace protection method for vanadium extraction converter | |
| CA2851604C (en) | Method of reduction processing of steel-making slag | |
| CN102912069B (en) | Low-cost slag splashing protection method of vanadium extraction converter | |
| KR100694012B1 (en) | A slag conditioner composition, process for manufacture and method of use in steel production | |
| CN103397133B (en) | Method for protecting converter with vanadium slag | |
| CN102424886B (en) | Furnace protection process for decarburization converter less slag splashing | |
| CN102912072B (en) | Low-cost slag regulating agent for vanadium-extracting converter splash protection | |
| CN103146873B (en) | The semi-steel making slagging method of enrichment sludge ball and semi-steel making | |
| CN103397132B (en) | Method for enhancing erosion resistance of vanadium extraction converter lining | |
| CN104195283A (en) | Vanadium slag modifier for converter vanadium extraction and converter vanadium extraction smelting method | |
| CN104745760B (en) | The method of splashing slag in converter | |
| CN101691623B (en) | Process for smelting vanadium-containing molten iron converter | |
| CN103525971B (en) | Vanadium slag modifier and preparation method thereof, and vanadium-extracting revolving furnace slag-splashing furnace-protecting method | |
| CN107988456A (en) | A kind of converter steelmaking process | |
| CN104131134B (en) | The technique of making foamed slag in a kind of electric arc furnace molten bath | |
| JP4329724B2 (en) | Converter scrap increase method | |
| CN106086287A (en) | Semi-steel making improves the method for aim carbon rear converter terminal residue adjustment | |
| CN103205525B (en) | Furnace protective pellet for vanadium extracting converter and manufacturing method thereof | |
| CN104694702B (en) | The additive of vanadium extraction chromium splashing slag in converter | |
| CN104673963B (en) | Slag modifier for slag splashing protection of vanadium-chromium recovery converter | |
| CN104694703B (en) | Modifier for splashing slag furnace protecting for vanadium-chromium extracting converter | |
| CN104673962B (en) | Slag state regulator for slag splashing protection of vanadium-chromium recovery converter | |
| CN112877495A (en) | Method for maintaining converter bottom by maintaining carbon-oxygen deposit | |
| CN102560008A (en) | Submerged arc slag for refining aluminum-containing low-silicon steel ladle and preparation method for submerged arc slag |
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 |