CN1124780A - Steel foam dephosphorizing machine - Google Patents
Steel foam dephosphorizing machine Download PDFInfo
- Publication number
- CN1124780A CN1124780A CN 95113035 CN95113035A CN1124780A CN 1124780 A CN1124780 A CN 1124780A CN 95113035 CN95113035 CN 95113035 CN 95113035 A CN95113035 A CN 95113035A CN 1124780 A CN1124780 A CN 1124780A
- Authority
- CN
- China
- Prior art keywords
- steel
- furnace
- dephosphorization
- dephosphorizing agent
- dephosphorizing
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 25
- 239000010959 steel Substances 0.000 title claims abstract description 25
- 239000006260 foam Substances 0.000 title claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Inorganic materials [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims abstract description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 10
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- 239000002893 slag Substances 0.000 abstract description 16
- 238000003723 Smelting Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000002045 lasting effect Effects 0.000 abstract description 3
- 238000009845 electric arc furnace steelmaking Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910014770 Ca4P2O9 Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 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 relates to a steel foam dephosphorizing agent especially suitable for electric arc furnace steelmaking, which is characterized in that the dephosphorizing agent contains 7-25% of CaF210-20% of BaCO34 to 10.5 percent of Na2CO342-66% of CaCO35-20% of FeO, and 0-10% of BaSO can be added into the dephosphorizing agent according to different smelting conditions and steel grade requirements4And 0-7% LiCO3. The dephosphorizing agent is beneficial to forming lasting and stable foam slag in the furnace in an early stage, has an obvious dephosphorizing effect, and can reduce the consumption of partial auxiliary materials and the smelting cost.
Description
The invention relates to a steel foam dephosphorizing agent which is particularly suitable for electric arc furnace steelmaking and can also be used as a dephosphorizing agent for open-hearth furnace and converter steelmaking.
At present, the steel-making process of high-power electric arc furnace + ladle refining + continuous casting is an internationally recognized advanced process route. According to the requirements of the short-flow production process, scrap steel needs to be quickly melted, and the temperatures of [ P], [ C]and molten steel meet the requirements of steel types, so that the advantages of the high-power electric arc furnace and the short-flow production process can be fully embodied, and the method mainly depends on whether quick melting and quick dephosphorization can be realized.
CN1066887A discloses a technology named as dephosphorization in cupola, which is characterized in that BaCO is added in cupola3Adding BaCO3The purpose of (B) is to provide a gas source andto increase the dephosphorization ability, but because of BaCO3The decomposition temperature of (A) is 1450 ℃, so that only when the temperature in the furnace is around 1450 ℃, BaCO is generated3Can play a role of providing gas source in the furnace.
The invention aims to provide a high-efficiency rapid dephosphorization agent which is beneficial to early formation of foam slag with good fluidity and lasting stability in a furnace and is provided with an air source in the whole smelting process.
The invention is realized by the following steps:
the steel foam dephosphorization agent is characterized by comprising 7-25 wt% of CaF24 to 10.5 percent of Na2CO342-66% of CaCO310-20% of BaCO35-20% of FeO.
Further, the dephosphorization agent also contains 0-7% of LiCO30 to 10% of BaSO4。
In the dephosphorizing agent of the invention, proper amount of CaF2The fluidity of the slag can be enhanced to accelerate the dephosphorization reaction, but if CaF2Less than 7%, its effect is not obvious, CaF2If the content of the slag is more than 25 percent, the slag is too thin to be beneficial to forming foam slag. Therefore, 7 percent to CaF2Preferably less than or equal to 25 percent.
CaCO3Is formation of Ca3P2O8Or Ca4P2O9So that [ P]in the molten steel is mainly Ca3P2O8Or Ca4P2O9The products enter into the slag and CaCO3Can provide early gas source, and practice shows that CaCO3The content of (B) is preferably 42 to 66%.
BaCO3、Na2CO3、LiCO3All can play the role of further strengthening and consolidating dephosphorization capability, and because of CaCO3、BaCO3、Na2CO3、LiCO3The decomposition temperature of the smelting furnace is gradually increased, so that the whole smelting process is ensured to be provided with a gas source.
Considering the alkalinity and viscosity of the slag, the dephosphorization reaction and the condition for maintaining the foam slag, and the like, 10 percent to less than or equal to BaCO3≤20％、4％≤Na2CO3Preferably less than or equal to 10.5 percent.
FeO and CaO in furnace charge or CaCO in dephosphorizing agent3The CaO generated by decomposition jointly forms dephosphorization conditions, and the chemical reaction equation is as follows:
FeO is also responsible for providing an early gas source for smelting.
Na2CO3Can also improve the alkalinity of the slag and can also be used with CaF2Together reduce SiO in the raw material2Interference to dephosphorization and thus improving dephosphorization ability.
LiCO3Can strengthen the dephosphorization capability and provide gas source. Practice shows that for steel grades with high dephosphorization requirements, 0-7% of LiCO is added3Will have a significant effect.
BaSO4The decomposition temperature of (A) is above 1800 ℃ and is much higher than the smelting temperature, it does not react in the furnace and still exists in the form of particles, but the bubbles have anattaching effect on the particles, that is, BaSO4Can form gas core to form stable foam slag, and BaSO in 0-10% is added according to different smelting conditions4It is more suitable.
After the dephosphorizing agent is used, the invention has the following outstanding effects and advantages: the dephosphorization effect is obvious; the method is favorable for forming lasting and stable foam slag in the furnace in an early stage; the smelting time can be shortened, and the service life of the furnace life is relatively prolonged; the power consumption is saved, the consumption of electrodes, lime, carbon powder, oxygen, iron ore and the like in auxiliary materials is reduced, and the smelting cost is reduced.
The present invention will be further described with reference to the following examples.
The steel foam dephosphorization agent is obtained by uniformly mixing the raw materials of the invention with the particle size of less than 30 meshes according to the proportion shown in the table 1.
TABLE 1
| Chemical composition | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| CaF2 | 20％ | 10％ | 7％ | 25％ | 13％ | 10％ |
| BaCO3 | 10％ | 10％ | 15％ | 20％ | 10％ | 12％ |
| LiCO3 | 5％ | 7％ | 3％ | 3％ | 0 | 0 |
| Na2CO3 | 5％ | 7％ | 4％ | 4％ | 5％ | 4％ |
| CaCO3 | 45％ | 51％ | 55％ | 43％ | 50％ | 54％ |
| FeO | 10％ | 5％ | 16％ | 5％ | 20％ | 20％ |
| BaSO4 | 5％ | 10％ | 0 | 0 | 2％ | 0 |
The dephosphorization agent for the steel foam is used for carrying out 113-furnacesteel tests in a certain steel plant, 8298 tons of steel are smelted in total, and 80 tons of the dephosphorization agent are consumed. The test process comprises the following steps: and (3) putting the dephosphorizing agent into the furnace at the middle-lower part of the furnace charge when the second material is fed into the furnace along with a 100-ton UHP electric arc furnace, adding the dephosphorizing agent into the furnace according to 5-12 Kg per ton of steel according to the amount of social waste steel in the waste steel, adding 10-15 Kg per ton of steel by using 10% of pig iron, simultaneously reducing the adding amount of 10Kg lime into the ton steel of the furnace time for testing, automatically slagging along with the operation of foamed slag after the furnace charge is dissolved, and then taking a molten slag sample to analyze the phosphorus content in the steel. The test results are shown in Table 2. (Down rotation page 5)
TABLE 2
| Item | Unit of | By dephosphorization Continuous production of the preparation Product 113 Average furnace steel Value of | Without using the stripper Continuous phosphorus agent Production of 53 Average furnace steel Value of | Is relatively poor |
| 1. Average steel tapping amount | Ton of | 73.43 | 72.31 | +1.07 |
| 2. Mean melting phosphorus [ p ]] | ％ | 0.0128 | 0.0151 | -0.0023 |
| 3. Minimum melting Point [ P ]] | ％ | 0.004 | 0.007 | -0.003 |
| 4. Melting down [ P ]]One-time combination Lattice rate (less than or equal to 0.02%) | ％ | 90.27 | 82.13 | 8.14 |
| 5. Average foamed slag after melting down Height | mm | 180 | 80 | +100 |
| 6. Average smelting time | min | 131.85 | 142 | -10.15 |
| 7. Average smelting power consumption | Kwh/t | 591 | 666.02 | -75.02 |
| 8. Average life of slag line of electric furnace | Next time | 87 | 31.3 | +55.7 |
| 9. Electric furnace slope ramming material life Medicine for curing acute respiratory diseases | Next time | 100 | 44.71 | +55.29 |
| 10. Average life of triangular area of furnace cover Prepare for | Next time | 100 | 78.25 | +11.75 |
| 11. Average lime consumption | Kg/t | 51 | 66 | -15 |
| 12. Average consumption of dephosphorizing agent | Kg/t | 9.64 | 0 | +9.64 |
Claims (2)
1. The steel foam dephosphorization agent is characterized by comprising 7-25 wt% of CaF24 to 10.5 percent of Na2CO342-66% of CaCO310-20% of BaCO35-20% of FeO.
2. Dephosphorization of steel foam according to claim 1The dephosphorizing agent is characterized in that the dephosphorizing agent also contains 0-7% LiCO30 to 10% of BaSO4。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95113035A CN1039832C (en) | 1995-10-16 | 1995-10-16 | Dephosphorization agent for steel foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95113035A CN1039832C (en) | 1995-10-16 | 1995-10-16 | Dephosphorization agent for steel foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1124780A true CN1124780A (en) | 1996-06-19 |
| CN1039832C CN1039832C (en) | 1998-09-16 |
Family
ID=5079827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95113035A Expired - Fee Related CN1039832C (en) | 1995-10-16 | 1995-10-16 | Dephosphorization agent for steel foam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039832C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078620C (en) * | 1999-11-30 | 2002-01-30 | 宝山钢铁股份有限公司 | Ladle finer reduction foaming agent |
| CN100338234C (en) * | 2004-07-27 | 2007-09-19 | 上海盘龙实业有限公司 | Nuisance free dephosphorized foaming slag in barium series with iron one containing BaSo2 as raw material |
| CN101302578B (en) * | 2008-06-27 | 2010-06-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Composite vanadium extraction and dephosphorization agent for vanadium-containing molten iron and preparation thereof |
| CN103820599A (en) * | 2013-11-25 | 2014-05-28 | 江苏大学 | Grate-layer material of steel refining furnace, and application method thereof |
| KR20180067392A (en) * | 2016-12-12 | 2018-06-20 | 주식회사 포스코 | Flux and the method thereof |
| WO2018110914A3 (en) * | 2016-12-12 | 2018-08-09 | 주식회사 포스코 | Dephosphorizing flux and method for preparing same |
| CN109852756A (en) * | 2019-03-06 | 2019-06-07 | 安徽工业大学 | A kind of efficient chromium-containing molten iron pretreatment dephosphorizing agent of few fluorine |
| CN115335347A (en) * | 2020-03-05 | 2022-11-11 | 法商圣高拜欧洲实验及研究中心 | Dephosphorization slag |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105347A (en) * | 1985-07-05 | 1986-12-31 | 李观素 | The dephosphorization novel process of high mangaenese steel and high quality steel |
| CN1038518C (en) * | 1993-06-07 | 1998-05-27 | 北京科技大学 | Submerged-arc scum for steel chamber refinery furnace |
-
1995
- 1995-10-16 CN CN95113035A patent/CN1039832C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078620C (en) * | 1999-11-30 | 2002-01-30 | 宝山钢铁股份有限公司 | Ladle finer reduction foaming agent |
| CN100338234C (en) * | 2004-07-27 | 2007-09-19 | 上海盘龙实业有限公司 | Nuisance free dephosphorized foaming slag in barium series with iron one containing BaSo2 as raw material |
| CN101302578B (en) * | 2008-06-27 | 2010-06-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Composite vanadium extraction and dephosphorization agent for vanadium-containing molten iron and preparation thereof |
| CN103820599A (en) * | 2013-11-25 | 2014-05-28 | 江苏大学 | Grate-layer material of steel refining furnace, and application method thereof |
| CN103820599B (en) * | 2013-11-25 | 2016-04-06 | 江苏大学 | A kind of steel melting furnace grate-layer material and using method thereof |
| WO2018110914A3 (en) * | 2016-12-12 | 2018-08-09 | 주식회사 포스코 | Dephosphorizing flux and method for preparing same |
| KR20180067392A (en) * | 2016-12-12 | 2018-06-20 | 주식회사 포스코 | Flux and the method thereof |
| KR101960934B1 (en) * | 2016-12-12 | 2019-07-17 | 주식회사 포스코 | Flux and the method thereof |
| CN110073009A (en) * | 2016-12-12 | 2019-07-30 | 株式会社Posco | Dephosphorising flux and preparation method thereof |
| EP3553190A4 (en) * | 2016-12-12 | 2020-01-22 | Posco | Dephosphorizing flux and method for preparing same |
| CN110073009B (en) * | 2016-12-12 | 2021-10-29 | 株式会社Posco | Dephosphorization flux and preparation method thereof |
| US11225695B2 (en) | 2016-12-12 | 2022-01-18 | Posco | Dephosphorizing flux and method for preparing same |
| CN109852756A (en) * | 2019-03-06 | 2019-06-07 | 安徽工业大学 | A kind of efficient chromium-containing molten iron pretreatment dephosphorizing agent of few fluorine |
| CN115335347A (en) * | 2020-03-05 | 2022-11-11 | 法商圣高拜欧洲实验及研究中心 | Dephosphorization slag |
| CN115335347B (en) * | 2020-03-05 | 2024-07-30 | 法商圣高拜欧洲实验及研究中心 | Dephosphorization slag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039832C (en) | 1998-09-16 |
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