CN108315516A - Ultrahigh aluminum slag system for blast furnace smelting - Google Patents
Ultrahigh aluminum slag system for blast furnace smelting Download PDFInfo
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- CN108315516A CN108315516A CN201810446662.XA CN201810446662A CN108315516A CN 108315516 A CN108315516 A CN 108315516A CN 201810446662 A CN201810446662 A CN 201810446662A CN 108315516 A CN108315516 A CN 108315516A
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- blast furnace
- slag
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- tio
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- 239000002893 slag Substances 0.000 title claims abstract description 75
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 41
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000003723 Smelting Methods 0.000 title abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 24
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004411 aluminium Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 23
- 229910052593 corundum Inorganic materials 0.000 claims description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 239000010436 fluorite Substances 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 239000011572 manganese Substances 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract 4
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 229910052742 iron Inorganic materials 0.000 description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- -1 Oxonium ion Chemical class 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001720 Åkermanite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/04—Making slag of special composition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an ultrahigh aluminum slag system for blast furnace smelting, which comprises the following components in percentage by mass: 10-16% of MgO; al (Al)2O318～30％；TiO21～5％；R20.7 to 1.15. When Al is contained in blast furnace high-alumina slag2O3When the content is 18-20%, MgO is 10-12%; TiO 221～5％；R21.05 to 1.10. When Al is contained in blast furnace high-alumina slag2O3When the content is 20-23%, MgO is 12-13%; TiO 222～5％；R21.0 to 1.05. When Al is contained in blast furnace high-alumina slag2O313-14.5% of MgO when the content is 23-25%; TiO 223～5％；R20.9 to 1.0. When Al is contained in blast furnace high-alumina slag2O3MgO is 14.5-16% when the content is 25-30%; TiO 223～5％；R20.8 to 0.9. The ultrahigh aluminum slag system can improve the stability of the slag and relieve the defect that the fluidity of the high aluminum slag fluctuates greatly along with temperature and components. Flux such as fluorite, manganese ore and the like does not need to be added into the blast furnace burden, so that the slag ratio can be reduced, the air permeability of the blast furnace is further increased, and the corrosion of the flux in the slag to hearth refractory materials can be reduced.
Description
Technical field
The present invention relates to field of steel metallurgy, more particularly to a kind of superelevation aluminium slag system for blast furnace process.
Background technology
Steel industry is influenced by conditions such as excess capacities, and existing market performance is sluggish, thus reduces cost as each steel
The primary work of existence is protected by factory, and in this context, blast furnace largely becomes a trend with addition of high alumina low price ore.However when height
When stove largely uses high aluminium ore, it will cause slag viscosity increase, tap cinder and difficult and increase fuel consumption of tapping a blast furnace.Cause
This effectively reduces blast fumance cost to largely utilize high aluminium ore, and high aluminium ore is substantially a large amount of low aluminium ore of cooperation
Stone uses, finally by the Al in blast-furnace slag2O3Content controls below 16%.But such dilution " Al in clinker2O3Content "
High aluminium ore application method limits a large amount of uses of high aluminium ore, it is difficult to blast fumance cost be greatly lowered.
In recent years, as each steel plant are to the pay attention to day by day of reduction blast fumance cost, people constantly propose that large scale makes
With the new method of high aluminium ore：
A kind of blast furnace slag system for blast furnace process of Chinese Patent Application No. 201410557803.7, discloses one kind and is used for
The high alumina slag system of blast furnace process.For the present invention under the premise of meeting blast furnace process slag system performance requirement, innovation utilizes Al2O3From
Effect in slag system, with Al2O3Instead of the SiO in existing slag system2, while reducing SiO2Content, by the high aluminum smelting technology of tradition
Alumino-silicate slag system becomes aluminosilicate slag system, using the high aluminium ore kind of current blast furnace process, coordinates other iron ores, can obtain
Al in slag2O3Reach 20%~30% even higher slag system, meets blast furnace process slag system requirement.But this kind of slag system clinker is steady
Qualitative difference, slag viscosity are changed very greatly by temperature fluctuation in ingredient fluctuation and blast furnace, it will are caused to the stable smooth operation of blast furnace
It influences.
A kind of method improving high-aluminum slag fluidity in blast furnace ironmaking process of Chinese Patent Application No. 201110190772.2,
A kind of improvement high-aluminum slag fluidity in blast furnace ironmaking process method is disclosed, is included the following steps：First, in blast furnace ironmaking process
Middle to replace Iron Ore Powder using boron-containing iron concentrate part, it is respectively 8~27% to contain Fe >=50% that will account for mass percent, contains B2O3
Mixture fortune is made in≤10% boron-containing iron concentrate, 8~15% flux, 2.5~4.5% fuel and 53~82% Iron Ore Powder
Boracic sinter is obtained after being sintered to sintering machine, using blast furnace process boracic sinter, realizes the iron and boron of boracic sinter
Separation, boron oxide enter in blast furnace slag the mobility for improving clinker, solve blast furnace process high alumina slag and bring clinker sticky, iron
The problem of water desulfurization effect difference.Above-mentioned patent Shortcomings are, although above-mentioned patent can reduce slag viscosity and improve clinker
Mobility, but the B in iron ore2O3Cannot 100% enter clinker, some B2O3It is reduced into B to enter in clinker, meeting
Influence the production of follow-up special rolling-mill section.
Invention content
Technical problem to be solved by the invention is to provide a kind of superelevation aluminium slag systems for blast furnace process, make Al in slag2O3
Content is increased to 20~30%, reduces high-melting-point substances larnite (2CaOSiO in traditional blast furnace slag2) content.From
And the fusing point of clinker can be reduced, the use ratio of high aluminium ore at a low price is improved, blast furnace ironmaking cost is greatly reduced.
To achieve the above object, the present invention is realized using following technical scheme：
A kind of superelevation aluminium slag system for blast furnace process, the mass percentage of constituent are：MgO 10~16%；
Al2O318~30%；TiO21~5%；Dual alkalinity CaO/SiO2That is R20.7~1.15.
As Al in blast furnace high aluminium slag2O3When being 18~20%, MgO 10~12%；TiO21~5%；R21.05~
1.10。
As Al in blast furnace high aluminium slag2O3When being 20~23%, MgO 12~13%；TiO22~5%；R21.0~1.05.
As Al in blast furnace high aluminium slag2O3When being 23~25%, MgO 13~14.5%；TiO23~5%；R20.9~1.0.
As Al in blast furnace high aluminium slag2O3When being 25~30%, MgO 14.5~16%；TiO23~5%；R20.8~0.9.
Compared with prior art, the beneficial effects of the invention are as follows：
1. superelevation aluminium slag of the present invention system reduces and slag melting warm-natured keeps the good mobility of clinker and desulfurization while spend
Ability, content of MgO replaces the part CaO in existing slag system in clinker, provides free O2-, TiO2Oxonium ion O is provided2-, blocking silicon,
Aluminium ion reticular structure makes the silica of labyrinth and alumina gas ions be dissociated into simple (SiO4)4-(AlO2)-Ion list
Body reduces slag viscosity.Reduce CaO and SiO in clinker2Generate high-melting-point substances larnite (2CaOSiO2, fusing point
2150 DEG C) proportion, while increasing the manganolite (Ca of low melting point3(Si3O8), 1540 DEG C of fusing point) and akermanite (Ca2[Mg
(Si2O7)], 1458 DEG C of fusing point) proportion, slag fluidity and the slag melting warm-natured degree of reduction are improved to reach.
2. the present invention can greatly increase the usage amount of high aluminium ore at a low price, blast furnace feeding cost of material is reduced, to drop
Low blast furnace ironmaking cost.
3. the present invention no longer needs to be incorporated the fluxing agents such as fluorite and manganese ore into blast furnace burden, slag ratio can be not only reduced, into
One step increases blast furnace permeability, can also reduce erosion of the fluxing agent to the resistance to material of cupola well in clinker.
4. superelevation aluminium slag of the present invention system can improve clinker stability, high alumina slag mobility is alleviated with temperature and wavelet
Dynamic big defect.
Description of the drawings
Fig. 1 is slag viscosity-temperature profile.
Fig. 2 is clinker stability index comparison diagram.
Specific implementation mode
The specific implementation mode of the present invention is further illustrated below in conjunction with the accompanying drawings：
A kind of superelevation aluminium slag system for blast furnace process, the mass percentage of constituent are：MgO 10~16%；
Al2O318~30%；TiO21~5%；R20.7~1.15.
As Al in blast furnace high aluminium slag2O3When being 18~20%, MgO 10~12%；TiO21~5%；R21.05~
1.10。
As Al in blast furnace high aluminium slag2O3When being 20~23%, MgO 12~13%；TiO22~5%；R21.0~1.05.
As Al in blast furnace high aluminium slag2O3When being 23~25%, MgO 13~14.5%；TiO23~5%；R20.9~1.0.
As Al in blast furnace high aluminium slag2O3When being 25~30%, MgO 14.5~16%；TiO23~5%；R20.8~0.9.
Embodiment
High alumina slag system ingredient such as table 1 shows that wherein A1 forms for existing blast fumance high alumina slag system, and A2, A3, A4 and A5 are this
Inventive embodiments high alumina slag system forms.
1 high alumina slag system ingredient (wt, %) of table
| CaO | SiO2 | Al2O3 | MgO | TiO2 | R2 | R3 | |
| A1 | 41.12 | 33.6 | 16.11 | 7.98 | 0 | 1.22 | 1.46 |
| A2 | 34.2 | 32.5 | 19.26 | 10.50 | 2.10 | 1.07 | 1.38 |
| A3 | 30.58 | 30.28 | 22.1 | 12.5 | 3.2 | 1.01 | 1.43 |
| A4 | 27.74 | 29.2 | 24.2 | 13.5 | 4.2 | 0.95 | 1.41 |
| A5 | 23.06 | 27.1 | 28.8 | 15.2 | 4.5 | 0.85 | 1.40 |
Using same blast furnace process condition, physical properties of melt comprehensive tester pair is used to A1, A2, A3, A4 and A5 clinker
High alumina slag viscosity is measured, and measuring temperature is respectively 1450 DEG C, 1500 DEG C, 1550 DEG C；
Measurement result is as shown in Figure 1.
It will be seen from figure 1 that with Al in clinker2O3The high-temperature region viscosity of the increase of content, clinker is produced with normal substantially
When blast furnace slag viscosity it is identical, can meet blast furnace process to slag fluidity requirement.
In order to further evaluate the metallurgical performance of blast furnace slag, clinker stability index is defined
η1450℃And η1500℃Viscosity at respectively 1450 DEG C and 1500 DEG C, i.e. slag fluidity change with temperature and the size of fluctuation, stove
Slag stability index value is bigger, and the stability of slag is better, and anti-fluctuation ability is stronger when blast furnace process.
A1, A2, A3, A4 and A5 clinker stability index comparison such as Fig. 2 show, it can be seen that are smelted using this method
Clinker stability it is more preferable, anti-fluctuation ability is stronger.
Described above is only the basic principle of the present invention, is not imposed any restrictions to the present invention, every right according to the present invention
It carries out equivalent variations and modification, within the scope of the art of this patent protection scheme.
Claims (5)
1. a kind of superelevation aluminium slag system for blast furnace process, which is characterized in that the mass percentage of constituent is：MgO 10
~16%；Al2O318~30%；TiO21~5%；Dual alkalinity CaO/SiO2That is R2It is 0.7~1.15.
2. a kind of superelevation aluminium slag system for blast furnace process according to claim 1, which is characterized in that when blast furnace high aluminium slag
Middle Al2O3When being 18~20%, MgO 10~12%；TiO21~5%；R21.05~1.10.
3. a kind of superelevation aluminium slag system for blast furnace process according to claim 1, which is characterized in that when blast furnace high aluminium slag
Middle Al2O3When being 20~23%, MgO 12~13%；TiO22~5%；R21.0~1.05.
4. a kind of superelevation aluminium slag system for blast furnace process according to claim 1, which is characterized in that when blast furnace high aluminium slag
Middle Al2O3When being 23~25%, MgO 13~14.5%；TiO23~5%；R20.9~1.0.
5. a kind of superelevation aluminium slag system for blast furnace process according to claim 1, which is characterized in that when blast furnace high aluminium slag
Middle Al2O3When being 25~30%, MgO 14.5~16%；TiO23~5%；R20.8~0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446662.XA CN108315516A (en) | 2018-05-11 | 2018-05-11 | Ultrahigh aluminum slag system for blast furnace smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446662.XA CN108315516A (en) | 2018-05-11 | 2018-05-11 | Ultrahigh aluminum slag system for blast furnace smelting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108315516A true CN108315516A (en) | 2018-07-24 |
Family
ID=62895729
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| CN201810446662.XA Pending CN108315516A (en) | 2018-05-11 | 2018-05-11 | Ultrahigh aluminum slag system for blast furnace smelting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643760A (en) * | 2019-09-30 | 2020-01-03 | 鞍钢股份有限公司 | Ultrahigh Al2O3Blast furnace smelting method of furnace slag |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263863A (en) * | 2014-10-20 | 2015-01-07 | 山东钢铁股份有限公司 | High-alumina slag system for blast furnace smelting |
-
2018
- 2018-05-11 CN CN201810446662.XA patent/CN108315516A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263863A (en) * | 2014-10-20 | 2015-01-07 | 山东钢铁股份有限公司 | High-alumina slag system for blast furnace smelting |
Non-Patent Citations (2)
| Title |
|---|
| 严志明等: "TiO2对高铝高炉渣粘度的影响", 《第十六届全国大高炉炼铁学术年会论文集》 * |
| 韩宏松等: "梅钢5号高炉高铝炉渣优化技术研究", 《第十六届全国大高炉炼铁学术年会论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643760A (en) * | 2019-09-30 | 2020-01-03 | 鞍钢股份有限公司 | Ultrahigh Al2O3Blast furnace smelting method of furnace slag |
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