CN103805724A - Blast-furnace tapping method and blast-furnace tapping device - Google Patents
Blast-furnace tapping method and blast-furnace tapping device Download PDFInfo
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- CN103805724A CN103805724A CN201410074575.8A CN201410074575A CN103805724A CN 103805724 A CN103805724 A CN 103805724A CN 201410074575 A CN201410074575 A CN 201410074575A CN 103805724 A CN103805724 A CN 103805724A
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Abstract
The invention provides a blast-furnace tapping method and a blast-furnace tapping device. The method comprises the following steps: blowing calcium fluoride powder into slag and iron in an iron storage type slag and iron runner by virtue of a pipeline in the slag and iron runner of a blast furnace. The device comprises a tap hole, an iron storage type slag and iron runner, a blowing pipeline, a powder supply system and a blowing power system, wherein the blowing pipeline is set to blow the calcium fluoride powder into the iron storage type slag and iron runner; the powder supply system is used for providing the calcium fluoride powder for the blowing pipeline; the blowing power system is used for providing power for the blowing pipeline. According to the method and the device, slag-iron separation can be effectively realized, the method and the device are especially suitable for performing slag-iron separation on the blast-furnace slag containing high titanic oxide content, and the iron loss can be greatly reduced.
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
Conventionally,, in blast furnace ironmaking is produced, due to the slag iron density difference flowing out in blast furnace, 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, the often separation difficulty of slag iron of emitting from blast furnace taphole, cause the part iron shot can not polymerization and flow out with slag liquid, cause unnecessary loss.According to statistics, the iron loss that only slag is taken away just can be up to 6.32%.
The Chinese patent literature that disclosed notification number was CN201330258Y on October 21st, 2009 discloses a kind of skimmer, 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 this kind of skimmer is during for generation of the blast furnace casting process of titanium slag, separating effect is bad.
Summary of the invention
The object of the invention is to solve at least one in prior art above shortcomings.
For example, the object of the present invention is to provide one can effectively realize the blast furnace casting method and apparatus that slag iron (the especially slag iron of high-titanium blast furnace slag) separates.
An aspect of of the present present invention provides a kind of blast furnace casting method.Described blast furnace casting method comprises that pipeline in the iron storage type slag iron runner by being arranged on blast furnace is to the calcium fluoride powder of jetting 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 obtaining 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 the more than 50% of calcium fluoride powder total amount.
Another aspect of the present invention 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 the calcium fluoride powder of jetting in iron storage type slag iron runner, powder supplying system is for providing calcium fluoride powder to winding-up pipeline, and winding-up power system is 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 orifices that are evenly arranged in iron storage type slag iron runner.
Compared with prior art, method and apparatus of the present invention can effectively be realized slag iron and separate, and the blast furnace slag being particularly useful for containing higher titanium oxide carries out the separation of slag iron, and can greatly reduce iron loss.
Embodiment
Hereinafter, describe blast furnace casting method of the present invention and blast furnace casting device in detail in connection 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 the calcium fluoride powder of jetting in iron storage type slag iron runner, powder supplying system is for providing calcium fluoride powder to winding-up pipeline, and winding-up power system is for providing power to winding-up pipeline.
In an exemplary embodiment of blast furnace casting device of the present invention, preferably, the heeling-in of winding-up pipeline is in iron storage type slag iron runner both sides.In addition, winding-up pipeline also can comprise multiple spray orifices that are evenly arranged in iron storage type slag iron runner.Can make like this calcium fluoride powder mix with the slag iron in iron storage type slag iron runner fully, thereby improve Performance of Slag quickly and efficiently, and then slag iron is effectively separated, and further reduce iron loss.
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 to the calcium fluoride powder of jetting 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 obtaining through blast-furnace smelting titanium-containing iron ore, and described slag is the slag that titanium content is higher.For example, the titanium oxide in the slag of described slag iron by weight percentage composition meter accounts for 18%～28%, and the tapping temperature of this slag iron can be 1380～1480 ℃.For the higher slag of described titanium content, 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 the 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 (for example, hopper) and winding-up power system (for example, compressed air-feed device).Iron storage type slag iron runner can make the slag iron flowing out from blast furnace iron notch stop the scheduled time therein.The heeling-in of winding-up pipeline is in iron storage type slag iron runner, with the slag iron winding-up calcium fluoride powder 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.In the slag of this slag iron, contain 18% titanium oxide by weight percentage, the tapping temperature of this slag iron is 1430 ℃.
The calcium fluoride powder of jetting in slag iron by 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 the 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.In the slag of this slag iron, contain 21% titanium oxide by weight percentage, the tapping temperature of this slag iron is 1430 ℃.
The calcium fluoride powder of jetting in slag iron by 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 the 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.In the slag of this slag iron, contain 23% titanium oxide by weight percentage, the tapping temperature of this slag iron is 1435 ℃.
The calcium fluoride powder of jetting in slag iron by 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 the 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 effectively be realized slag iron and separate, and the blast furnace slag being particularly useful for containing higher titanium oxide carries out the separation of slag iron, and can greatly reduce iron loss, for example, MFe iron loss in slag can be down to below 2.3%.
Although described the present invention in conjunction with exemplary embodiment above, those of ordinary skills should be clear, in the case of not departing from the spirit and scope of claim, can carry out various modifications to above-described embodiment.
Claims (7)
1. a blast furnace casting method, is characterized in that, described blast furnace casting method comprises that pipeline in the iron storage type slag iron runner by being arranged on blast furnace is to the calcium fluoride powder of jetting in the slag iron in iron storage type slag iron runner.
2. blast furnace casting method according to claim 1, is characterized in that, described slag iron is the slag iron obtaining through blast-furnace smelting titanium-containing iron ore, and in described slag, the weight percentage of titanium oxide is 18%～28%.
3. blast furnace casting method according to claim 2, is characterized in that, the winding-up amount of described calcium fluoride powder is 1～20kg/ ton iron.
4. blast furnace casting method according to claim 1, is characterized in that, the granularity of described calcium fluoride powder is <0.1mm, and wherein the part of particle diameter <0.074mm accounts for the more than 50% of calcium fluoride powder total amount.
5. 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 is set to the calcium fluoride powder of jetting in iron storage type slag iron runner, powder supplying system is for providing calcium fluoride powder to winding-up pipeline, and winding-up power system is for providing power to winding-up pipeline.
6. blast furnace casting device according to claim 5, is characterized in that, the heeling-in of described winding-up pipeline is in iron storage type slag iron runner both sides.
7. according to the blast furnace casting device described in claim 5 or 6, it is characterized in that, described winding-up pipeline comprises multiple spray orifices that are 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385127A (en) * | 2017-07-18 | 2017-11-24 | 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 sluicing system |
| 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 |
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| 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 |
| 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 |
| 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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2014
- 2014-03-03 CN CN201410074575.8A patent/CN103805724B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385127A (en) * | 2017-07-18 | 2017-11-24 | 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 sluicing system |
| 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 |
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