CN102787197A - High-efficiency slagging and dephosphorization agent and preparation method thereof - Google Patents
High-efficiency slagging and dephosphorization agent and preparation method thereof Download PDFInfo
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- CN102787197A CN102787197A CN2012102262264A CN201210226226A CN102787197A CN 102787197 A CN102787197 A CN 102787197A CN 2012102262264 A CN2012102262264 A CN 2012102262264A CN 201210226226 A CN201210226226 A CN 201210226226A CN 102787197 A CN102787197 A CN 102787197A
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- dephosphorizing agent
- agent
- high efficiency
- dephosphorization
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000009628 steelmaking Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000002425 crystallisation Methods 0.000 claims abstract description 3
- 230000008025 crystallization Effects 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 43
- 239000003795 chemical substances by application Substances 0.000 claims description 38
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 28
- 229910052742 iron Inorganic materials 0.000 claims description 18
- 239000002893 slag Substances 0.000 claims description 16
- 239000000292 calcium oxide Substances 0.000 claims description 14
- 235000012255 calcium oxide Nutrition 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 238000013467 fragmentation Methods 0.000 claims description 2
- 238000006062 fragmentation reaction Methods 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims description 2
- 238000007499 fusion processing Methods 0.000 claims description 2
- 238000002309 gasification Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000003756 stirring Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000010795 gaseous waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention proposes a high-efficiency slagging and dephosphorization agent and a preparation method thereof. The preparation method of the slagging and dephosphorization agent comprises preparing raw materials, crushing, mixing with stirring, distributing materials in a batch-wise way, smelting at a high temperature of 1500 to 1550 DEG C, smelting and tapping, cooling crystallization, breaking to mold, and obtaining the slagging and dephosphorization agent for steel-making, wherein the agent is rich in CaO and Fe2O3, has a particle size of 3 to 40 mm, uses 2CaO.Fe2O3 as a main phase and has a melting point of less than or equal to 1280 DEG C. The dephosphorization agent has increased ferric oxide content due to reduced ferrous oxide, thereby enhancing oxidizability and further improving the slagging and dephosphorization effect of the agent. The agent facilitates reducing dosage of the dephosphorization agent, shortening processing time and improving working efficiency.
Description
Technical field
The invention belongs to metallurgical technology field, especially a kind of convertor steelmaking process that is used for removes phosphorus in the steel, reduces dephosphorization agent of phosphorus content in the molten steel and preparation method thereof.
Background technology
At present, along with the continuous increase of low phosphoretic steel demand, the also corresponding increase of the consumption of dephosphorization material, the kind of dephosphorizing agent is also increasing.Disclosed heterogeneity, composition and also quite a lot in the prior art by the dephosphorizing agent of different preparing methods' preparations.These dephosphorization materials all have certain dephosphorization effect, and the material of the dephosphorization best results of generally acknowledging is the pre-molten calcium ferrite.Why effect is preferable for pre-molten calcium ferrite materialization slag dephosphorizing agent, is because its unique physicochemical property.The mineral structure of said material is a calcium ferrite, has that fusing point is low, stable, oxidisability is strong, with the wetting good characteristics of slag lime.And in these advantages, oxidisability is again extremely important.Research shows that the ferrous iron in the pre-molten calcium ferrite materialization slag dephosphorizing agent is low more, and oxidisability is strong more.Its dephosphorization effect is just remarkable more.Yet for existing pre-molten calcium ferrite materialization slag dephosphorizing agent, its ferrous iron content generally all is higher than 12.0% (weight percent), can not satisfy the development of present steel-making industry.Therefore, how to control the ferrous iron content in the dephosphorizing agent, produce the low steel-making of ferrous iron content with dephosphorization agent the present invention just the key problem in technology place that will face.
Summary of the invention
The objective of the invention is to overcome the deficiency that above-mentioned various converter steelmaking dephosphorization material exists, invent pre-molten calcium ferrite materialization slag dephosphorizing agent of a kind of low ferrous iron content and preparation method thereof, further improve the result of use of dephosphorization material.Inventive point of the present invention is the innovation through raw-material selection, melting technology, realizes that preparation ferrous iron content is lower than 10.0%, phase structure is with 2CaOFe
2O
3It is main grain bulk product.
In order to reach the foregoing invention purpose, technical scheme of the present invention is following, and the preparation method of this dephosphorization agent may further comprise the steps:
The first step: prepare raw material, raw material comprises material that is rich in quicklime and the material that is rich in red stone; The material that is rich in red stone adopts the iron oxide containing materials of iron protoxide (FeO)≤10.0%, metallic iron (MFe)≤3.0%, non-oxide iron and non-oxide calcium solid impurity total content≤10.0%; The material that is rich in quicklime adopts quicklime (CaO)>=54%, and the material of solid impurity total content≤10.0% is as main raw material; Impurity wherein comprises MgO, Al
2O
3, MnO, SiO
2, K
2O, Na
2O, P and S or the like;
Second step: raw material is carried out break process, be broken into the powder of 0～2.0mm;
The 3rd step: mix, the raw material in going on foot second after the fragmentation is according to Fe in the desired product
2O
3Prepare burden with the requirement of CaO composition, and mix through the mode that stirs;
The 4th step: cloth is in batches carried out in cloth melting, the raw material that mixes when adding high temperature melting furnace, and each fabric thickness must not surpass 300 millimeters, is beneficial to its fusing and oxidation; In the fusion process temperature in the stove and melting atmosphere are controlled: 1400 ℃～1450 ℃ following meltings; The oxidisability of control furnace gas; The coefficient of excess of air will be higher than 5.0%～12.0% of trouble-free burning amount, avoids furnace gas that red stone is reduced into iron at a low price by high price iron;
The 5th step: fusion is come out of the stove after confirming furnace charge fusing evenly, the crystallization cooling;
The 6th step: broken moulding, process and be rich in CaO and Fe
2O
3, granularity is 3～40mm grain piece, with 2CaOFe
2O
3Be principal phase, the steel-making dephosphorization agent of fusing point≤1280 ℃, concrete composition comprises Fe
2O
350%～80%, CaO10%～40%, FeO≤10.0%, metallic iron (MFe)≤3.0%, content of impurities≤10.0%, Al in the impurity
2O
3: 1.5%～3.5%, SiO
2: 1.5%～3.5%, K
2O+Na
2O 1.5%～2.5%, and all the other impurity are MgO, MnO, P and S or the like, is at high temperature to decompose the material that gasification is got rid of.
The invention has the beneficial effects as follows:
On the former basis that has superiority, the minimizing of iron protoxide has increased the content of red oxide of iron, and oxidisability strengthens and its fusing point stable, in its fusing is arranged the relatively long dephosphorizing time faster simultaneously, and the effect of making it slag and dephosphorization further promotes.Be beneficial to and reduce the dephosphorizing agent consumption, shorten the treatment time and improve operating efficiency.
Embodiment
Below, specify the preferred embodiments of the present invention.Need to prove before this; Employed term or word can not limited interpretation be common implication or the implication in the dictionary in this specification sheets and claims, and should be based on being interpreted as implication and the notion that meets technological thought of the present invention for the principle that can suitably define the notion of term with its invention contriver of best mode explanation.Thereupon; The structure of representing among the embodiment that this specification sheets is put down in writing is one of most preferred embodiment of the present invention; Can not represent technological thought of the present invention fully, therefore should be understood that to have various equivalents and the variation that to replace for the present invention.
The steel-making of adopting method of the present invention to produce with four kinds of different material components below uses the dephosphorization agent to explain as example.
Proportioning raw materials is seen table 1:
Table 1 steel-making is with the proportioning raw materials (weight percent) of dephosphorization agent
Discarded calcareous ash wherein is the industrial gaseous waste thing that limestone kiln dedusting ash, screen underflow etc. contain quicklime.Use the composition of the dephosphorization agent that method of the present invention prepares to see table 2:
The prepared steel-making of table 2 is with the component (weight percent) and the fusing point of dephosphorization agent
※:
Red oxide of iron (%Fe in the table 2 O 3 ) numerical value is to be converted by full iron (%TFe).The rest is measured value.
The phase structure of dephosphorization agent is with 2CaOFe
2O
3Be principal phase, fusing point all≤1280 ℃, its metallic iron equal size all is lower than 3.0%, iron protoxide all is lower than 10.0%.
In addition; For the better effect and the effect of explanation dissolving agent of the present invention, the data that the dephosphorization agent of using preparation method of the present invention to produce is applied to concrete data and the prior art of 300 tons of six embodiment in the actual STEELMAKING PRODUCTION application of converter contrast to be explained.Concrete data are seen table 3.Should use embodiment 1-6 adopt respectively by table 2 preparation embodiment 1-6 the dephosphorizing agent of corresponding component.
Table 3. implementation result
※
Phase structure in the foregoing is seen table 3
Table 4 is seen in the thing phase composite of the dephosphorizing agent in the foregoing description, wherein red oxide of iron (%Fe
2O
3) amount be by full iron (TFe) reduced:
The thing phase composite of product among table 4 embodiment
Code name CF-50 in the table 4, CF-55, CF-60, CF-65, CF-70, CF-75 are the abbreviation of calcium ferrite, and parameter wherein is Fe
2O
3Weight percent.
By the embodiment and the common CaO-Fe of available technology adopting that adopt dephosphorizing agent of the present invention to make steel in the table 3
2O
3-Al
2O
3The contrast that is dephosphorizing agent can be found out: though the add-on of dephosphorizing agent is 10 kilograms of/ton steel in the prior art; Want many than the add-on 8-10 kilogram/ton steel of dephosphorizing agent among the present invention; But dephosphorization agent of the present invention and have better dephosphorization effect; Dephosphorization rate all is higher than 90%, and dephosphorization rate is high, unit consumption is low, fluoride (such product of part has used fluorite in the prior art) not, stable performance.
Describe and illustrate with reference to embodiment although it should be noted that the present invention, and in embodiment, provided the concrete steps of the concrete composition and preparation method thereof of high efficiency slag dephosphorizing agent.But and do not mean that the present invention is limited to the embodiment of these descriptions.Those skilled in the art can therefrom derive many different variants, and they all will be covered in the true spirit and scope of claim of the present invention.
Claims (8)
1. high efficiency slag dephosphorizing agent, it is characterized in that: the composition of said steel-making dephosphorizing agent comprises Fe
2O
3: 50%～70%, CaO:10%～40%, FeO: MFe (metallic iron)≤10.0% :≤3.0%, content of impurities≤10.0%, Al in the impurity
2O
3: 1.5%～3.5%, SiO
2: 1.5%～3.5%, K
2O+Na
2O:1.5%～2.5%, all the other impurity are MgO, MnO, P and S etc., are at high temperature to decompose the material that gasification is got rid of; The phase structure of said steel-making dephosphorizing agent is with 2CaOFe
2O
3Be principal phase, fusing point≤1280 ℃.
2. the preparation method of a kind of high efficiency slag dephosphorizing agent according to claim 1, it is characterized in that: the preparation method may further comprise the steps:
The first step: prepare raw material, raw material comprises material that is rich in quicklime and the material that is rich in red stone;
Second step: raw material is carried out break process;
The 3rd step: mix, the raw material after the fragmentation in second step is mixed by a certain percentage;
The 4th step: the cloth melting adds mixed raw materials and carries out melting in the high temperature melting furnace;
The 5th step: come out of the stove post crystallization cooling of fusion;
The 6th step: broken moulding.
3. the preparation method of a kind of high efficiency slag dephosphorizing agent according to claim 2 is characterized in that: the material that is rich in red stone described in the first step in the raw material adopts the material of iron protoxide (FeO)≤10.0%, metal Fe≤3.0%, non-oxide iron and non-oxide calcium solid impurity total content≤10.0%; And the material that is rich in quicklime adopt quicklime (CaO>=54%, the material of solid impurity total content≤10.0% is as main raw material; Impurity wherein comprises MgO, Al
2O
3, MnO, SiO
2, K
2O, Na
2O, P and S or the like.
4. the preparation method of a kind of high efficiency slag dephosphorizing agent according to claim 3 is characterized in that: the break process process in second step becomes raw material crushing the powder of 0～2.0mm.
5. the preparation method of a kind of high efficiency slag dephosphorizing agent according to claim 4 is characterized in that: in the 3rd step mixing process, the blending ratio of two kinds of raw materials is according to Fe in the desired product
2O
3Confirm with the requirement of CaO composition, and uniform mixing.
6. the preparation method of a kind of high efficiency slag dephosphorizing agent according to claim 5 is characterized in that: the furnace charge of going into the stove melting in the 4th step will carry out cloth in batches, and each fabric thickness must not surpass 300 millimeters, is beneficial to its fusing and oxidation; In the fusion process temperature in the stove and melting atmosphere are controlled: 1500 ℃～1550 ℃ following meltings; The oxidisability of control furnace gas; The air feed coefficient of air will be higher than 5.0%～12.0% of trouble-free burning amount, to avoid furnace gas red stone is reduced into iron at a low price by high price iron.
7. the preparation method of a kind of high efficiency slag dephosphorizing agent according to claim 6 is characterized in that: in the 5th step, after confirming furnace charge fusing evenly, come out of the stove and cool off.
8. the preparation method of a kind of high efficiency slag dephosphorizing agent according to claim 7 is characterized in that: in the broken forming process in the 6th step, through broken, process and be rich in CaO and Fe
2O
3, granularity is 3～40mm grain piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102262264A CN102787197A (en) | 2012-06-28 | 2012-06-28 | High-efficiency slagging and dephosphorization agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102262264A CN102787197A (en) | 2012-06-28 | 2012-06-28 | High-efficiency slagging and dephosphorization agent and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102787197A true CN102787197A (en) | 2012-11-21 |
Family
ID=47152783
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|---|---|---|---|
| CN2012102262264A Pending CN102787197A (en) | 2012-06-28 | 2012-06-28 | High-efficiency slagging and dephosphorization agent and preparation method thereof |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483318A (en) * | 2016-02-23 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel steelmaking slagging agent and preparation method thereof |
| CN114231329A (en) * | 2022-01-13 | 2022-03-25 | 鞍钢股份有限公司 | A kind of iron powder composite fuel and its preparation and application method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068074A (en) * | 2007-09-13 | 2009-04-02 | Sanyo Special Steel Co Ltd | Slag-making method in ladle refining for low carbon alloy steel |
| CN102296153A (en) * | 2011-08-22 | 2011-12-28 | 辽宁天和科技股份有限公司 | Novel premelting dephosphorization agent for steel making and preparation method thereof |
| CN102296152A (en) * | 2011-08-22 | 2011-12-28 | 辽宁天和科技股份有限公司 | Novel converter steelmaking dephosphorization agent and preparation method thereof |
-
2012
- 2012-06-28 CN CN2012102262264A patent/CN102787197A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068074A (en) * | 2007-09-13 | 2009-04-02 | Sanyo Special Steel Co Ltd | Slag-making method in ladle refining for low carbon alloy steel |
| CN102296153A (en) * | 2011-08-22 | 2011-12-28 | 辽宁天和科技股份有限公司 | Novel premelting dephosphorization agent for steel making and preparation method thereof |
| CN102296152A (en) * | 2011-08-22 | 2011-12-28 | 辽宁天和科技股份有限公司 | Novel converter steelmaking dephosphorization agent and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483318A (en) * | 2016-02-23 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel steelmaking slagging agent and preparation method thereof |
| CN114231329A (en) * | 2022-01-13 | 2022-03-25 | 鞍钢股份有限公司 | A kind of iron powder composite fuel and its preparation and application method |
| CN114231329B (en) * | 2022-01-13 | 2022-08-16 | 鞍钢股份有限公司 | Iron powder composite fuel and preparation and application methods thereof |
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Application publication date: 20121121 |