CN110453024A - Boracic slag system containing manganese for blast furnace process - Google Patents
Boracic slag system containing manganese for blast furnace process Download PDFInfo
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- CN110453024A CN110453024A CN201910886150.XA CN201910886150A CN110453024A CN 110453024 A CN110453024 A CN 110453024A CN 201910886150 A CN201910886150 A CN 201910886150A CN 110453024 A CN110453024 A CN 110453024A
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- blast furnace
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- 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
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Abstract
The invention belongs to vanadium titano-magnetite technical field of blast furnace ironmaking, and in particular to a kind of boracic slag system containing manganese for blast furnace process, it is composed of the following components: TiO217wt%~19wt%, MgO 7wt%~9wt%, Al2O312wt%~14wt%, MnO 1.0wt%~2.0wt%, B2O31.5wt%~3.0wt%, surplus are CaO and SiO2, wherein CaO and SiO2Mass ratio be 0.95~1.05:1.Slag system of the invention can be effectively reduced the melting temperature of clinker, have preferable mobility it at a lower temperature, high-titanium blast furnace slag is reduced to the adverse effect of the ventilative liquid permeability of stock column at stock column cohesive zone position, cupola well centre, promote being reasonably distributed of gas fluid in blast furnace, promotes the fast quick-recovery of conditions of blast furnace.
Description
Technical field
The invention belongs to vanadium titano-magnetite technical field of blast furnace ironmaking, and in particular to a kind of boracic for blast furnace process contains
Manganese slag system.
Background technique
Suitable slagging regime is one of the basic condition for realizing conditions of blast furnace stable smooth operation.For high-Ti type V-Ti magnet
Mine blast furnace process, exist it is comprehensive enter the features such as furnace Iron grade is low, to enter furnace sinter low temperature pulverization rate high, production ton scum amount is big,
The clinker TiO generated in blast furnace ironmaking process2Content is high, melting temperature is high, TiO in slag2Reduction is easily crossed by coke and generates Ti
The high-melting-points such as (C, N) object mutual inhibition slugging iron mobility.Above-mentioned reason easily leads to blast furnace melting with soft and the ventilative transparent liquid of middle one's will dies within one stock column
Property be deteriorated, further result in gas fluid in blast furnace be difficult to control.When blast furnace dischargeable capacity is more than 1200m3Afterwards, blast furnace crucibe diameter increases
Greatly, the blast furnace center stock column region for smelting high-titanium type vanadium-titanium magnetite is more difficult to be blown through；Especially equipment fault is subjected in blast furnace
After carrying out urgent damping down, the distribution of conditions of blast furnace internal gas flow is disturbed, and the working of a furnace is difficult to smoothly restore after often leading to furnace compound wind
To normal production level, or even there is the working of a furnace and deteriorate for a long time, causes the economic loss of up to ten million members easily for enterprise.Therefore,
In the case where high-titanium type vanadium-titanium magnetite blast furnace process blast wandering, how to optimize and stablize a good slag system, to furnace
The recovery of condition has a very important significance.
Summary of the invention
The purpose of the present invention is to provide a kind of boracics for being suitable for the recovery of high-titanium type vanadium-titanium magnetite conditions of blast furnace containing manganese
Slag system, composed of the following components:
TiO217wt%~19wt%, MgO 7wt%~9wt%, Al2O312wt%~14wt%, MnO 1.0wt%
~2.0wt%, B2O31.5wt%~3.0wt%, surplus are CaO and SiO2, wherein CaO and SiO2Mass ratio be 0.95~
1.05:1.
Wherein, the above-mentioned boracic slag system containing manganese for blast furnace process, it is composed of the following components: CaO 28.75wt%, SiO2
28.75wt%, TiO218wt%, MgO 7.5wt%, Al2O313wt%, MnO 1.5wt%, B2O32.5wt%.
Wherein, the above-mentioned boracic slag system containing manganese for blast furnace process, it is characterised in that: CaO and SiO2Mass ratio be 1:
1。
Compared with prior art, the beneficial effects of the present invention are:
Slag system of the invention can be effectively reduced the melting temperature of clinker, and making it at a lower temperature has preferably
Mobility reduces high-titanium blast furnace slag to the unfavorable shadow of the ventilative liquid permeability of stock column at stock column cohesive zone position, cupola well centre
It rings, promotes being reasonably distributed of gas fluid in blast furnace, promote the fast quick-recovery of conditions of blast furnace.
Detailed description of the invention
Fig. 1 is the viscosity-temperature curve figure of slag system involved in embodiment 1.
Specific embodiment
Specifically, it is used for the boracic slag system containing manganese of blast furnace process, it is composed of the following components:
TiO217wt%~19wt%, MgO 7wt%~9wt%, Al2O312wt%~14wt%, MnO 1.0wt%
~2.0wt%, B2O31.5wt%~3.0wt%, surplus are CaO and SiO2, wherein CaO and SiO2Mass ratio be 0.95~
1.05:1.Preferably, composed of the following components: CaO 28.75wt%, SiO228.75wt%, TiO218wt%, MgO
7.5wt%, Al2O313wt%, MnO 1.5wt%, B2O32.5wt%, wherein CaO and SiO2Mass ratio be 1:1.
Slag system feature provided by the invention is that MnO belongs to difficult reduced oxide, although can be improved oxygen gesture in slag, suppression
High-titanium blast furnace slag processed is restored in crossing for cupola well upper pyrometer area, reduces the generation of high-melting-point Ti (C, N) substance, but to clinker
Mobility and melting temperature reduce amplitude very little, i.e., small to slag fluidity improvement amplitude, greatly improve MnO in clinker, anticipate
Taste more MnO be reduced into Mn, increase cupola well thermic load pressure.B2O3Fusing point is low, can be with other groups in high-titanium blast furnace slag
It is mitogenetic at the lower substance of fusing point, to reduce the melting temperature and viscosity of clinker, while B2O3It can enhance as oxide
Oxygen gesture in slag, further suppresses TiO2Cross and restore, but boracic iron ore B2O3Content is low, and price is high, and use ratio substantially increases,
Blast furnace ironmaking increased costs, and individually increase B2O320 DEG C are no more than to the reduction amplitude of slag melting warm-natured degree.Manganese is applied simultaneously
Mine and boracic iron ore, when obtaining slag system provided by the invention, in MnO, B2O3Under collective effect, clinker oxygen gesture is improved, can
The high-melting-point Ti (C, N) and graphite Carbon deposition deposited in cupola well is effectively removed, slag melting warm-natured degree reduction amplitude can reach
It 70 DEG C or so, is significantly increased, and economic cost is controllable.
A specific embodiment of the invention is further described below with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described range.
Embodiment 1
A blast furnace carries out blast furnace process by primary raw material of vanadium titano-magnetite, and entering furnace Iron grade is 50.2%, and slag iron ratio is
625kg/t, slag system ingredient is main in normal productive process are as follows: TiO222%~22.5%, MgO 7.0%~8.0%,
Al2O312%~14%, CaO/SiO2: 1.10~1.13, through detecting, 1385 DEG C of the slag system melting temperature average out to, under high temperature
Viscosity is evaluated as 0.28Pas.Using the slag system as benchmark slag, slag system experiment as shown in table 1, experiment are prepared on this basis
The results are shown in Table 2.It is slag melting from the slag system ingredient that A blast furnace normally produces to slag system ingredient provided by the invention (the 5th group)
Warm-natured degree co-falling is 73 DEG C low, and since high-titanium blast furnace slag is under non-reducing condition, oneself viscosity is lower, therefore viscosity changes under high temperature
Kind amplitude is not too much big.
1 slag system ingredient of table
| CaO | SiO2 | MgO | Al2O3 | TiO2 | MnO | B2O3 | R2 | |
| JZ | 30.11 | 26.89 | 7.50 | 13.00 | 22.50 | 0.00 | 0.00 | 1.12 |
| 1 | 32.49 | 29.01 | 7.50 | 13.00 | 18.00 | 0.00 | 0.00 | 1.12 |
| 2 | 30.75 | 30.75 | 7.50 | 13.00 | 18.00 | 0.00 | 0.00 | 1.00 |
| 3 | 30.00 | 30.00 | 7.50 | 13.00 | 18.00 | 1.50 | 0.00 | 1.00 |
| 4 | 29.5 | 29.5 | 7.50 | 13.00 | 18.00 | 0.00 | 2.50 | 1.00 |
| 5 | 28.75 | 28.75 | 7.50 | 13.00 | 18.00 | 1.50 | 2.50 | 1.00 |
Note: R2For CaO and SiO2Mass ratio
2 slag system metallurgical performance confirmatory experiment result of table
| Experimental group | JZ | 1 | 2 | 3 | 4 | 5 |
| Melting temperature (DEG C) | 1385 | 1378 | 1369 | 1365 | 1362 | 1312 |
| Viscosity (PaS) at 1450 DEG C | 0.28 | 0.3 | 0.27 | 0.26 | 0.23 | 0.22 |
Claims (3)
1. being used for the boracic slag system containing manganese of blast furnace process, which is characterized in that composed of the following components:
TiO217wt%~19wt%, MgO 7wt%~9wt%, Al2O312wt%~14wt%, MnO 1.0wt%~
2.0wt%, B2O31.5wt%~3.0wt%, surplus are CaO and SiO2, wherein CaO and SiO2Mass ratio be 0.95~
1.05:1.
2. being used for the boracic slag system containing manganese of blast furnace process according to claim 1, which is characterized in that composed of the following components:
CaO 28.75wt%, SiO228.75wt%, TiO218wt%, MgO 7.5wt%, Al2O313wt%, MnO 1.5wt%,
B2O32.5wt%.
3. the boracic slag system containing manganese according to claim 1 or claim 2 for blast furnace process, it is characterised in that: CaO and SiO2Matter
Amount is than being 1:1.
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| CN201910886150.XA CN110453024A (en) | 2019-09-19 | 2019-09-19 | Boracic slag system containing manganese for blast furnace process |
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| CN201910886150.XA CN110453024A (en) | 2019-09-19 | 2019-09-19 | Boracic slag system containing manganese for blast furnace process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280917A (en) * | 2020-09-25 | 2021-01-29 | 攀钢集团研究院有限公司 | Method for reducing iron loss in blast furnace smelting of vanadium titano-magnetite and fluxing powder |
| CN113684372A (en) * | 2021-07-29 | 2021-11-23 | 昆明贵研新材料科技有限公司 | Method for recovering platinum group metal from spent automobile catalyst |
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| JPH02239138A (en) * | 1989-03-11 | 1990-09-21 | Nippon Jiryoku Senko Kk | Method for reforming steel making slag |
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| CN102251064A (en) * | 2011-07-08 | 2011-11-23 | 北京科技大学 | Method for improving high-aluminum slag fluidity in blast furnace ironmaking process |
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| CN109306386A (en) * | 2018-08-29 | 2019-02-05 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of high titanium high alumina slag system for blast furnace process |
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2019
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| JPH02239138A (en) * | 1989-03-11 | 1990-09-21 | Nippon Jiryoku Senko Kk | Method for reforming steel making slag |
| CN102206719A (en) * | 2010-03-29 | 2011-10-05 | 攀钢集团钢铁钒钛股份有限公司 | Method for improving performance of furnace slag obtained by smelting vanadic titanomagnetite in blast furnace |
| CN102251064A (en) * | 2011-07-08 | 2011-11-23 | 北京科技大学 | Method for improving high-aluminum slag fluidity in blast furnace ironmaking process |
| CN103276126A (en) * | 2013-06-05 | 2013-09-04 | 北京科技大学 | Method for improving liquidity of high titanium slag in blast furnace smelting vanadium titano-magnetite |
| CN106834574A (en) * | 2017-02-24 | 2017-06-13 | 本钢板材股份有限公司 | One kind is colded pressing boracic pelletizing blast furnace prepurging solvent and its preparation, application method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280917A (en) * | 2020-09-25 | 2021-01-29 | 攀钢集团研究院有限公司 | Method for reducing iron loss in blast furnace smelting of vanadium titano-magnetite and fluxing powder |
| CN113684372A (en) * | 2021-07-29 | 2021-11-23 | 昆明贵研新材料科技有限公司 | Method for recovering platinum group metal from spent automobile catalyst |
| CN113684372B (en) * | 2021-07-29 | 2022-09-16 | 昆明贵研新材料科技有限公司 | Method for recovering platinum group metal from spent automobile catalyst |
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Application publication date: 20191115 |