CN103805724B - A kind of blast furnace casting method and blast furnace casting device - Google Patents
A kind of blast furnace casting method and blast furnace casting device Download PDFInfo
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- CN103805724B CN103805724B CN201410074575.8A CN201410074575A CN103805724B CN 103805724 B CN103805724 B CN 103805724B CN 201410074575 A CN201410074575 A CN 201410074575A CN 103805724 B CN103805724 B CN 103805724B
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Abstract
The invention provides a kind of blast furnace casting method and blast furnace casting device.Described method comprises to be jetted calcium fluoride powder by the pipeline be arranged in the iron storage type slag iron runner of blast furnace in the slag iron in iron storage type slag iron runner.Described device comprises iron notch, iron storage type slag iron runner, winding-up pipeline, powder supplying system and winding-up power system, wherein, winding-up pipeline is set to jet calcium fluoride powder in iron storage type slag iron runner, powder supplying system is used for providing calcium fluoride powder in winding-up pipeline, and winding-up power system is used for providing power to winding-up pipeline.Method and apparatus of the present invention can realize slag sluicing system effectively, is particularly useful for carrying out slag sluicing system to the blast furnace slag containing higher titanium oxide, and greatly can reduce iron loss.
Description
Technical field
The present invention relates to blast furnace technology and apparatus field, specifically, relate to a kind of blast furnace casting method and a kind of blast furnace casting device.
Background technology
Usually, in blast furnace ironmaking is produced, because the slag iron density flowed out in blast furnace is different, before State of Blast Furnace, utilize skimmer to realize the separation of slag iron more.
In v-bearing titanomagnetite smelting, particularly produce in the blast furnace ironmaking process of titanium slag, the height of furnace temperature directly has influence on effective separation of slag iron, in titanium slag smelting process, due to the difference of oxygen gesture in stove, the polymerization of iron shot is affected, from the slag iron often separation difficulty that blast furnace taphole is released, cause part iron shot not to be polymerized and flow out with slag liquid, causing unnecessary loss.According to statistics, the iron loss that only slag is taken away just can up to 6.32%.
Notification number is that the Chinese patent literature of CN201330258Y discloses a kind of skimmer disclosed in the 21 days October in 2009, and it sets up residue ditch sand dam between roughing runner sand dam and skimming plate, carries out separating for several times, improves iron yield in slag.But during blast furnace casting process for generation of titanium slag of this kind of skimmer, separating effect is bad.
Summary of the invention
The object of the invention is to solve at least one item in prior art above shortcomings.
Such as, the blast furnace casting method and apparatus that the object of the present invention is to provide one effectively can realize slag iron (especially the slag iron of high-titanium blast furnace slag) to be separated.
An aspect of of the present present invention provides a kind of blast furnace casting method.Described blast furnace casting method comprises to be jetted calcium fluoride powder by the pipeline be arranged in the iron storage type slag iron runner of blast furnace in the slag iron in iron storage type slag iron runner.
In an exemplary embodiment of blast furnace casting method of the present invention, described slag iron is the slag iron obtained through blast-furnace smelting titanium-containing iron ore, and in described slag, the weight percentage of titanium oxide is 18% ~ 28%.
In an exemplary embodiment of blast furnace casting method of the present invention, the winding-up amount of described calcium fluoride powder can be 1kg/tp ~ 20kg/ ton iron.
In an exemplary embodiment of blast furnace casting method of the present invention, the granularity of described calcium fluoride powder can be <0.1mm, and wherein the part of particle diameter <0.074mm accounts for more than 50% of calcium fluoride powder total amount.
Another aspect provides a kind of blast furnace casting device.Described blast furnace casting device comprises iron notch, iron storage type slag iron runner, winding-up pipeline, powder supplying system and winding-up power system, wherein, winding-up pipeline is set to jet calcium fluoride powder in iron storage type slag iron runner, powder supplying system is used for providing calcium fluoride powder in winding-up pipeline, and winding-up power system is used for providing power to winding-up pipeline.
In an exemplary embodiment of blast furnace casting device of the present invention, described winding-up pipeline can heeling-in in iron storage type slag iron runner both sides.
In an exemplary embodiment of blast furnace casting device of the present invention, described winding-up pipeline can comprise multiple spray orifice be evenly arranged in iron storage type slag iron runner.
Compared with prior art, method and apparatus of the present invention can realize slag sluicing system effectively, is particularly useful for carrying out slag sluicing system to the blast furnace slag containing higher titanium oxide, and greatly can reduce iron loss.
Embodiment
Hereinafter, blast furnace casting method of the present invention and blast furnace casting device will be described in detail in conjunction with exemplary embodiment.
Blast furnace casting device according to an aspect of the present invention.Described blast furnace casting device comprises iron notch, iron storage type slag iron runner, winding-up pipeline, powder supplying system and winding-up power system, wherein, winding-up pipeline is set to jet calcium fluoride powder in iron storage type slag iron runner, powder supplying system is used for providing calcium fluoride powder in winding-up pipeline, and winding-up power system is used for providing power to winding-up pipeline.
In an exemplary embodiment of blast furnace casting device of the present invention, preferably, pipeline heeling-in is jetted in iron storage type slag iron runner both sides.In addition, pipeline of jetting also can comprise multiple spray orifice be evenly arranged in iron storage type slag iron runner.Calcium fluoride powder can be made like this to mix with the slag iron in iron storage type slag iron runner fully, thus improve Performance of Slag quickly and efficiently, and then slag iron is effectively separated, the low iron loss of a step-down of going forward side by side.
Blast furnace casting method according to a further aspect of the invention.The pipeline that described blast furnace casting method comprises the iron storage type slag iron runner both sides by being arranged on blast furnace is jetted calcium fluoride powder in the slag iron in iron storage type slag iron runner.
In blast furnace casting method of the present invention, slag iron is the slag iron obtained through blast-furnace smelting titanium-containing iron ore, and described slag is the slag that titanium content is higher.Such as, the titanium oxide weight percentage in the slag of described slag iron accounts for 18% ~ 28%, and the tapping temperature of this slag iron can be 1380 ~ 1480 DEG C.For the slag that described titanium content is higher, in blast furnace casting method of the present invention, the winding-up amount of calcium fluoride powder can be 1 ~ 20kg/ ton iron.
In blast furnace casting method of the present invention, preferably, the granularity of described calcium fluoride powder is <0.1mm, and wherein the part of particle diameter <0.074mm accounts for more than 50% of calcium fluoride powder total amount.
Below in conjunction with concrete example, exemplary embodiment of the present invention is described.
Blast furnace casting device comprises iron notch, iron storage type slag iron runner, winding-up pipeline, powder supplying system (such as, hopper) and winding-up power system (such as, compressed air-feed device).Iron storage type slag iron runner can make the slag iron flowed out from blast furnace iron notch stop the scheduled time within it.Jet pipeline heeling-in in iron storage type slag iron runner, with calcium fluoride powder of jetting to the slag iron in iron storage type slag iron runner.Powder supplying system is communicated with winding-up pipeline, to provide calcium fluoride powder in winding-up pipeline.Winding-up power system is communicated with winding-up pipeline, to provide winding-up power to winding-up pipeline.
Adopt above-mentioned blast furnace casting device to carry out example below.
Example 1
In this example, slag iron enters iron storage type slag iron runner from the iron notch of blast furnace.Contain 18% titanium oxide by weight percentage in the slag of this slag iron, the tapping temperature of this slag iron is 1430 DEG C.
By calcium fluoride powder of jetting in the slag iron of heeling-in in the injection tube alignment iron storage type slag iron runner of the iron storage type slag iron runner side of blast furnace.The granularity of calcium fluoride powder is <0.1mm, and wherein, wherein the part of particle diameter <0.074mm accounts for more than 65% of calcium fluoride powder total amount.The winding-up amount of calcium fluoride powder is 1kg/ ton iron.
For this example, tap a blast furnace in process, metal in the dreg iron (MFe) can be reduced to 1.86%.
Example 2
In this example, slag iron enters iron storage type slag iron runner from the iron notch of blast furnace.Contain 21% titanium oxide by weight percentage in the slag of this slag iron, the tapping temperature of this slag iron is 1430 DEG C.
By calcium fluoride powder of jetting in the slag iron of heeling-in in the injection tube alignment iron storage type slag iron runner of the iron storage type slag iron runner side of blast furnace.The granularity of calcium fluoride powder is <0.1mm, and wherein, wherein the part of particle diameter <0.074mm accounts for more than 62% of calcium fluoride powder total amount.The winding-up amount of calcium fluoride powder is 7kg/ ton iron.
For this example, tap a blast furnace in process, in slag, MFe can be reduced to 2.3%.
Example 3
In this example, slag iron enters iron storage type slag iron runner from the iron notch of blast furnace.Contain 23% titanium oxide by weight percentage in the slag of this slag iron, the tapping temperature of this slag iron is 1435 DEG C.
By calcium fluoride powder of jetting in the slag iron of heeling-in in the injection tube alignment iron storage type slag iron runner of the iron storage type slag iron runner side of blast furnace.The granularity of calcium fluoride powder is <0.1mm, and wherein, wherein the part of particle diameter <0.074mm accounts for more than 58% of calcium fluoride powder total amount.The winding-up amount of calcium fluoride powder is 14kg/ ton iron.
For this example, tap a blast furnace in process, in slag, MFe can be reduced to 2.2%.
In sum, method and apparatus of the present invention can realize slag sluicing system effectively, is particularly useful for carrying out slag sluicing system to the blast furnace slag containing higher titanium oxide, and greatly can reduce iron loss, such as, MFe iron loss in slag can be down to less than 2.3%.
Although describe the present invention in conjunction with exemplary embodiment above, those of ordinary skill in the art should be clear, when not departing from the spirit and scope of claim, can carry out various amendment to above-described embodiment.
Claims (2)
1. a blast furnace casting device, it is characterized in that, described blast furnace casting device comprises iron notch, iron storage type slag iron runner, winding-up pipeline, powder supplying system and winding-up power system, wherein, winding-up pipeline heeling-in is in iron storage type slag iron runner both sides and calcium fluoride powder of jetting in iron storage type slag iron runner, the winding-up amount of described calcium fluoride powder is 1 ~ 20kg/ ton iron, the granularity of described calcium fluoride powder is <0.1mm, and wherein the part of particle diameter <0.074mm accounts for more than 50% of calcium fluoride powder total amount, powder supplying system is used for providing calcium fluoride powder in winding-up pipeline, winding-up power system is used for providing power to winding-up pipeline.
2. blast furnace casting device according to claim 1, is characterized in that, described winding-up pipeline comprises multiple spray orifice be evenly arranged in iron storage type slag iron runner.
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| CN201410074575.8A CN103805724B (en) | 2014-03-03 | 2014-03-03 | A kind of blast furnace casting method and blast furnace casting device |
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| CN201410074575.8A CN103805724B (en) | 2014-03-03 | 2014-03-03 | A kind of blast furnace casting method and blast furnace casting device |
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| CN103805724B true CN103805724B (en) | 2015-12-30 |
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| CN107385127B (en) * | 2017-07-18 | 2019-11-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the process of vanadium titano-magnetite blast furnace process slag iron separation |
| CN109207661A (en) * | 2018-10-18 | 2019-01-15 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for improving blast furnace crucibe oxygen gesture using cinder monkey |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201220946Y (en) * | 2008-06-06 | 2009-04-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Device for recovering metallic iron from vanadium-titanium blast furnace slag |
| CN201560201U (en) * | 2009-12-08 | 2010-08-25 | 攀钢集团攀枝花钢钒有限公司 | Slag-iron separation device for vanadium-titanium blast furnace slag |
| CN102061346A (en) * | 2011-01-14 | 2011-05-18 | 攀钢集团钢铁钒钛股份有限公司 | Method for improving metallurgical property of vanadium-titanium blast furnace slag |
| CN202030777U (en) * | 2011-03-29 | 2011-11-09 | 攀钢集团钢铁钒钛股份有限公司 | Injection device and skimmer provided with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519711A (en) * | 2008-02-26 | 2009-09-02 | 宝山钢铁股份有限公司 | Method for desiliconizing, demanganizing, dephosphorizing and desulfurating molten iron |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201220946Y (en) * | 2008-06-06 | 2009-04-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Device for recovering metallic iron from vanadium-titanium blast furnace slag |
| CN201560201U (en) * | 2009-12-08 | 2010-08-25 | 攀钢集团攀枝花钢钒有限公司 | Slag-iron separation device for vanadium-titanium blast furnace slag |
| CN102061346A (en) * | 2011-01-14 | 2011-05-18 | 攀钢集团钢铁钒钛股份有限公司 | Method for improving metallurgical property of vanadium-titanium blast furnace slag |
| CN202030777U (en) * | 2011-03-29 | 2011-11-09 | 攀钢集团钢铁钒钛股份有限公司 | Injection device and skimmer provided with same |
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