CN105734200A - Molten iron pretreatment stirring head slag removing method and stirring system - Google Patents
Molten iron pretreatment stirring head slag removing method and stirring system Download PDFInfo
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- CN105734200A CN105734200A CN201610192640.6A CN201610192640A CN105734200A CN 105734200 A CN105734200 A CN 105734200A CN 201610192640 A CN201610192640 A CN 201610192640A CN 105734200 A CN105734200 A CN 105734200A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a molten iron pretreatment stirring head slag removing method and a stirring system. After a stirring head treats molten iron, the speed of the stirring head is reduced to be low, in the process that the stirring head ascends to a slag removing station from a stirring station, stirring is conducted while ascending is conducted, most of slag on the molten iron slag face is gathered towards the periphery of a molten iron tank through the action of centrifugal force, slag in the middle portion is very sparse, the temperature is relatively high, and therefore adhering slag on the top is very little in the ascending process of the stirring head; and meanwhile due to the fact that the stirring head runs at a low speed, molten iron splashing is unlikely to be caused, in the process that after the bottom of the stirring head is exposed out of the molten iron liquid face, the stirring head ascends to the slag removing station, the stirring head is rapidly accelerated to the high speed, and fusion slag not having time to be cooled is removed through centrifugal force generated by high-speed operation of the stirring head. The processing period is not occupied while manual participation is not needed, the damage to refractory materials of the stirring head due to original mechanical removing is reduced, the workload of secondary removing of slag generated by mechanical removing is reduced, and the molten iron pretreatment stirring head slag removing method and the stirring system are extremely economical and effective.
Description
Technical field
The present invention relates to metallurgy industry technical field of hot metal pretreatment, be specifically related to a kind of pretreatment stirring head clinker removal method and stirring system.
Background technology
Mechanical mixing method molten iron pretreatment, in carrying out processing procedure, stirring-head must insert stirring in molten iron, drive molten iron high speed rotating, and in molten iron rotary course, in molten iron, add powder, under high temperature and good dynamics flow field, powder and molten iron react, and slough harmful element in molten iron.Product floats to molten iron level with floating thing in form, forms slag, thus being separated with molten iron by harmful element.According to technological process, after being disposed, stirring-head must be increased to the standby position above hot-metal bottle, is beneficial to skimming and Molten Iron Transportation of operation below.In the process that stirring-head rises, stirring-head vane tip meeting accumulated slag, if clearing up not in time, forcing at stirring-head core liquid slag under cooling and stirring-head blade natural cooling dual function in atmosphere quickly to harden, being difficult to clean up.Not clearing up stirring-head blade for a long time, on stirring-head, accumulated slag can present spherical, finally develops into and exceedes stirring-head blade diameter, makes stirring action weaken.
At present, the cleaning of stirring-head generally uses Mechanical Method, is divided into two kinds.A kind of conventional online means are for using slag scraper, and after stirring-head rises to and scrapes slag position, slag scraper is by cylinder ejector, and stirring-head rotates scrapes slag；One is cleared up for off-line, and namely workman uses pneumatic pick scarfing cinder.There is external force, the resistance to material of easy damaged stirring-head in this both of which, take the relatively multiprocessing time simultaneously, and particularly off-line method for cleaning labor strength is very big.The present invention, it is provided that a kind of online clinker removal method of pretreatment stirring head, is namely not take up the process cycle, is also not necessary to workman and participates in, extremely economical and effective.
Summary of the invention
The technical problem to be solved in the present invention is, in view of the foregoing defects the prior art has, provide a kind of pretreatment stirring head clinker removal method and stirring system, namely the process cycle it is not take up, also it is not necessary to workman participate in, decrease the infringement to the resistance to material of stirring-head that conventional mechanical chipping brings, decrease the workload of the slag secondary cleaning that mechanical chipping gets off, extremely economical and effective.
The present invention solves that above-mentioned technical problem be the technical scheme is that
A kind of pretreatment stirring head clinker removal method, comprises the following steps:
1) after the complete molten iron of stirring-head stir process, stirring-head is positioned at stirring position B, and stirring-head rotating speed is reduced to slow-speed of revolution R1；
2) from stirring position B stirring-head being promoted to interposition C, promoting speed be V1 at a slow speed, and stirring-head continues with slow-speed of revolution R1 rotation simultaneously, and at interposition C place, stirring-head is also in molten iron；
3) continue stirring-head to promote with V1 at a slow speed, and continue to rotate with slow-speed of revolution R1, be promoted to scarfing cinder position D from interposition C；
4) at scarfing cinder position D, stirring-head is quickly become high rotating speed R2 from slow-speed of revolution R1, and keep high rotating speed R2 to reach time T2 in time T1；
5) from scarfing cinder position D, stirring-head being promoted to standby position E, the rotating speed of stirring-head reduces to 0 from high rotating speed R2.
Connect technique scheme, described step 1) before, stirring-head drops to interior molten iron level position A from standby position E, in decline process, stirring-head rotates with slow-speed of revolution R1, decrease speed is reduced to V1 at a slow speed when dropping near molten iron level, operative employee sees that stirring-head contacts the spark sent with molten iron level, records height value corresponding to molten iron level position A, and calculates scarfing cinder position D by molten iron level position A.
Connect technique scheme, described step 2)～3) at a slow speed V1 be 2m/min～4m/min.
Connect technique scheme, described step 1)～4) middle and slow speed of revolution R1 is 20r/min～40r/min.
Connect technique scheme, described step 4)～5) in high rotating speed R2 be 90r/min～110r/min.
Connect technique scheme, described step 4) in time T1 be 15 seconds～25 seconds.
Connect technique scheme, described step 4) in time T2 be 10 seconds～20 seconds.
Connect technique scheme, be all be automatically performed by the electric control system of pre-set program in steps.
nullThe pretreatment stirring system used when implementing above-described pretreatment stirring head clinker removal method，Including stirring-head、Agitating device、Promote winding plant、Riser guide and steel structure platform，Stirring-head is arranged at agitating device lower end，Promote winding plant and riser guide is arranged on steel structure platform，Promoting winding plant drives agitating device to move up and down along riser guide，Also include guide wheel device、Tensioner apparatus and electric control system，Electric control system controls agitating device and rotates and lifting，Guide wheel device and tensioner apparatus are distributed on the framework surrounding of agitating device，Agitating device is contacted with riser guide by guide wheel device，Tensioner apparatus includes disc spring，By the tensile force of disc spring，Make regulating wheel and all tight with the riser guide good contact of directive wheel on each summit，And pretightning force is provided，Thus realizing agitating device to be close to riser guide，Make agitating device cannot rock in whipping process，Do not affect again the agitating device lifting along riser guide simultaneously.
Connecing technique scheme, the group number of described guide wheel device and tensioner apparatus is 6～10 groups.
The method have the advantages that
1. on interposition C, stirring-head rotates through the shearing of centrifugal force and molten iron and takes away the dross on a stirring-head, on the D of scarfing cinder position, the liquid slag also having not enough time to cooling is cleaned out by stirring-head high-speed rotation by centrifugal force, namely the process cycle it is not take up, also it is not necessary to workman participate in, decrease the infringement to the resistance to material of stirring-head that conventional mechanical chipping brings, decrease the workload of the slag secondary cleaning that mechanical chipping gets off, extremely economical and effective.
2. pass through guide wheel device and tensioner apparatus by the clamping mode between agitating device and riser guide, be the clamping mode of a kind of flexibility so that stirring-head can stir and lift.
Accompanying drawing explanation
Fig. 1 is the structural representation of pretreatment stirring system in the embodiment of the present invention；
Fig. 2 is the A-A sectional drawing of Fig. 1；
Fig. 3 be in Fig. 1 stirring-head at the schematic diagram of position A；
Fig. 4 be in Fig. 1 stirring-head at the schematic diagram of position B；
Fig. 5 be in Fig. 1 stirring-head at the schematic diagram of position C；
Fig. 6 is stirring-head scarfing cinder schematic diagram when position D in Fig. 1；
Fig. 7 be in Fig. 1 stirring-head at the schematic diagram of position E；
In figure, 1-promotes winding plant, 2-agitating device, 3-riser guide, 4-stirring-head, 5-hot-metal bottle, 6-molten iron transportation vehicle, 7-steel structure platform, 8-guide wheel device, 9-tensioner apparatus.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
Shown in reference Fig. 1～Fig. 7, the pretreatment stirring head clinker removal method in an embodiment provided by the invention, comprise the following steps:
1) after the stirring-head 4 complete molten iron of stir process, stirring-head 4 is positioned at stirring position B, and stirring-head 4 rotating speed is reduced to slow-speed of revolution R1；
2) from stirring position B stirring-head 4 being promoted to interposition C, promoting speed be V1 at a slow speed, and stirring-head 4 continues with slow-speed of revolution R1 rotation simultaneously, and at interposition C place, stirring-head 4 is also in molten iron；Now one side slag close hot-metal bottle 5 edge under centrifugal action, make middle part slag very thin, and temperature is of a relatively high, thus on stirring-head 4 end face, slag is less in stirring-head 4 uphill process, on the other hand, molten iron rotating speed is more than stirring-head 4 rotating speed, and dross temperature is of a relatively high, and the shearing force of liquid level can be taken away slag long-pending on a part of stirring-head 4 blade by molten iron；The simultaneously slower slow-speed of revolution is unlikely to cause molten iron splash；
3) continue stirring-head 4 to promote with V1 at a slow speed, and continue to rotate with slow-speed of revolution R1, be promoted to scarfing cinder position D from interposition C；
4) at scarfing cinder position D, stirring-head 4 is quickly become high rotating speed R2 from slow-speed of revolution R1, and keep high rotating speed R2 to reach time T2 in time T1；Rise in the process of scarfing cinder position after exposing molten iron level bottom stirring-head 4 to stirring-head 4, stirring-head 4 is quickly accelerated at a high speed, be cleaned out by the liquid slag also having not enough time to cooling under stirring-head 4 runs up the centrifugal force produced；
5) from scarfing cinder position D, stirring-head 4 being promoted to standby position E, the rotating speed of stirring-head 4 reduces to 0 from high rotating speed R2.
Further, during described 4 centrally located C of stirring-head, stirring-head 4 top is located just at molten iron level.
After stirring-head 4 has processed molten iron, stirring-head 4 speed reduces to low speed, and stirring-head 4 rises to stir the process of scarfing cinder position from stirring position and promotes, and on the molten iron top of the slag, major part slag is assembled to hot-metal bottle 5 periphery under centrifugal action, make middle part slag very thin, and temperature is of a relatively high.Thus top dross is little in stirring-head 4 uphill process, and dross temperature is of a relatively high, simultaneously because stirring-head 4 is low cruise, also it is unlikely to cause molten iron splash, rise in the process of scarfing cinder position after exposing molten iron level bottom stirring-head 4 to stirring-head 4, stirring-head 4 is quickly accelerated at a high speed, be cleaned out by the liquid slag also having not enough time to cooling under stirring-head 4 runs up the centrifugal force produced；Namely it is not take up the process cycle, is also not necessary to workman and participates in, decrease the infringement to the resistance to material of stirring-head 4 that conventional mechanical chipping brings, decrease the workload of the slag secondary cleaning that mechanical chipping gets off, extremely economical and effective.
Further, described step 1) before, stirring-head 4 drops to molten iron level position A in hot-metal bottle 5 from standby position E, in decline process, stirring-head 4 rotates with slow-speed of revolution R1, decrease speed is reduced to V1 at a slow speed when dropping near molten iron level, operative employee sees that stirring-head 4 contacts the spark sent with molten iron level, records height value corresponding to molten iron level position A, and calculates scarfing cinder position D by molten iron level position A.
Further, described step 2)～3) at a slow speed V1 be 2m/min～4m/min.
Further, described step 1)～4) middle and slow speed of revolution R1 is 20r/min～40r/min.
Further, described step 4)～5) in high rotating speed R2 be 90r/min～110r/min.
Further, described step 4) in time T1 be 15 seconds～25 seconds.
Further, described step 4) in time T2 be 10 seconds～20 seconds.
Further, be all be automatically performed by the electric control system of pre-set program in steps.
Further, described stirring-head 4 exposes molten iron level process to stirring-head 4 end face from stirring position B and rotates always, described stirring-head 4 is when the D scarfing cinder of scarfing cinder position, and liquid slag is directly got rid of under the influence of centrifugal force and falls in ferrum bag, or throws away after rear slag touches ferrum containment wall and entirely fall in ferrum bag.
nullFor 100 tons of pretreatment stirring systems，The pretreatment stirring system used when implementing pretreatment stirring head clinker removal method according to claim 1，Including stirring-head 4、Agitating device 2、Promote winding plant 1、Riser guide 3 and steel structure platform 7、，Stirring-head 4 is arranged at agitating device 2 lower end，Promote winding plant 1 and riser guide 3 is arranged on steel structure platform 7，Promoting winding plant 1 drives agitating device 2 to move up and down along riser guide 3，Agitating device 2 be connected with hot-metal bottle 5 and molten iron transportation vehicle 6，Hot-metal bottle 5 is arranged on molten iron transportation vehicle 6，It is characterized in that，Also include guide wheel device 8、Tensioner apparatus 9 and electric control system，Electric control system controls to stir device 2 and rotates and lift，Guide wheel device 8 and tensioner apparatus 9 are distributed on the framework surrounding of agitating device 2，Agitating device 2 is contacted with riser guide 3 by guide wheel device 8，Tensioner apparatus 9 includes disc spring，By the tensile force of disc spring，Make regulating wheel and all tight with riser guide 3 good contact of directive wheel on each summit，And pretightning force is provided，Thus realizing agitating device 2 to be close to riser guide 3，Make agitating device 2 cannot rock in whipping process，Do not affect again the agitating device 2 lifting along fluctuating orbit 3 simultaneously；By guide wheel device 8 and tensioner apparatus 9 by the clamping mode between agitating device 2 and riser guide 3, it is the clamping mode of a kind of flexibility so that stirring-head 4 can stir and lift.
Further, the group number of described guide wheel device 8 and tensioner apparatus 9 is 8 groups.
Scarfing cinder process terminates from stir process, as shown in Figure 4, stirring-head 4 is in stirring position B, terminates when rising to standby position E to stirring-head 4, as shown in Figure 7, because considering the acquisition of molten iron level height, i.e. molten iron level position A, as shown in Figure 3, implementation process is from stirring-head 4 from standby position E in detail below, start as it is shown in fig. 7, decline, comprise the steps:
Step one: stirring-head 4 is from standby position E, drop to molten iron level position A in hot-metal bottle 5, as shown in Figure 7, in decline process, stirring-head 4 rotates with slow-speed of revolution R1, and slow-speed of revolution R1 is 30r/min, reduces speed when dropping near molten iron level for V1 at a slow speed, V1 is 3m/min at a slow speed, operative employee sees that stirring-head 4 contacts the spark sent with molten iron level, point " survey liquid level " button on the operation screen of electric control system, the height value that electric control system Automatic Program record molten iron level position A is corresponding；
Step 2: stirring-head 4 drops to stirring position B with V1 at a slow speed automatically, as shown in Figure 4, carries out molten iron pretreatment by setting time and feed way by normal automatic mode after putting in place；
Step 3: mixing time terminates, stirring-head 4 rotating speed is high rotating speed R2 this moment, and high rotating speed R2 is 100r/min, and stirring-head 4 is positioned at stirring position B；
Step 4: stirring-head 4 promotes from stirring position B toward interposition C, promoting speed be V1 at a slow speed, while stirring-head 4 rotating speed be reduced to slow-speed of revolution R1, high rotating speed R2=100r/min, slow-speed of revolution R1=30r/min by high rotating speed R2；Now slag is near hot-metal bottle 5 edge under centrifugal action on the one hand, and on stirring-head 4 end face, slag is less；Molten iron rotating speed is more than stirring-head 4 rotating speed on the other hand, and the shearing force of liquid level can be taken away slag long-pending on a part of stirring-head 4 blade by molten iron, and simultaneously slower rotating speed is unlikely to cause molten iron splash；
Step 5: Automatic Program calculates scarfing cinder position D, as shown in Figure 6, stirring-head 4 continues to rise with V1 at a slow speed to arrive scarfing cinder position D with slow-speed of revolution R1 rotary speed simultaneously, and quickly from the slow-speed of revolution R1 paramount rotating speed R2 of rising in 20 seconds；
Step 6: keeping the rotating speed 15 seconds of high rotating speed R2, stirring-head 4 is risen to standby position E by Automatic Program, as it is shown in fig. 7, stirring-head 4 rotating speed is progressively reduced to 0r/min by high rotating speed in the process of lifting.
In the present embodiment, the headroom of molten iron level 5 mouthfuls away from hot-metal bottle be is 700mm, and now slag falls in hot-metal bottle 5 along direction as shown, as shown in Figure 6.
Above is only presently preferred embodiments of the present invention, certainly with this interest field limiting the present invention, therefore can not change according to the equivalence that the present patent application the scope of the claims is made, still belong to protection scope of the present invention.
Claims (10)
1. a pretreatment stirring head clinker removal method, it is characterised in that comprise the following steps:
1) after the complete molten iron of stirring-head stir process, stirring-head is positioned at stirring position B, and stirring-head rotating speed is reduced to slow-speed of revolution R1；
2) from stirring position B stirring-head being promoted to interposition C, promoting speed be V1 at a slow speed, and stirring-head continues with slow-speed of revolution R1 rotation simultaneously, and at interposition C place, stirring-head is also in molten iron；
3) continue stirring-head to promote with V1 at a slow speed, and continue to rotate with slow-speed of revolution R1, be promoted to scarfing cinder position D from interposition C；
4) at scarfing cinder position D, stirring-head is quickly become high rotating speed R2 from slow-speed of revolution R1, and keep high rotating speed R2 to reach time T2 in time T1；
5) from scarfing cinder position D, stirring-head being promoted to standby position E, the rotating speed of stirring-head reduces to 0 from high rotating speed R2.
2. pretreatment stirring head clinker removal method according to claim 1, it is characterized in that, described step 1) before, stirring-head drops to molten iron level position A from standby position E, in decline process, stirring-head rotates with slow-speed of revolution R1, reduces decrease speed when dropping near molten iron level to V1 at a slow speed, and operative employee sees that stirring-head contacts the spark sent with molten iron level, record height value corresponding to molten iron level position A, and calculate scarfing cinder position D by molten iron level position A.
3. pretreatment stirring head clinker removal method according to claim 1, it is characterised in that described step 2)～3) at a slow speed V1 be 2m/min～4m/min.
4. pretreatment stirring head clinker removal method according to claim 1, it is characterised in that described step 1)～4) middle and slow speed of revolution R1 is 20r/min～40r/min.
5. pretreatment stirring head clinker removal method according to claim 1, it is characterised in that described step 4)～5) in high rotating speed R2 be 90r/min～110r/min.
6. pretreatment stirring head clinker removal method according to claim 1, it is characterised in that described step 4) in time T1 be 15 seconds～25 seconds.
7. pretreatment stirring head clinker removal method according to claim 1, it is characterised in that described step 4) in time T2 be 10 seconds～20 seconds.
8. pretreatment stirring head clinker removal method according to claim 1, it is characterised in that be all be automatically performed by the electric control system of pre-set program in steps.
null9. the pretreatment stirring system used when implementing pretreatment stirring head clinker removal method according to claim 1，Including stirring-head、Agitating device、Promote winding plant、Riser guide and steel structure platform，Stirring-head is arranged at agitating device lower end，Promote winding plant and riser guide is arranged on steel structure platform，Promoting winding plant drives agitating device to move up and down along riser guide，It is characterized in that，Also include guide wheel device、Tensioner apparatus and electric control system，Electric control system controls agitating device and rotates and lifting，Guide wheel device and tensioner apparatus are distributed on the framework surrounding of agitating device，Agitating device is contacted with riser guide by guide wheel device，Tensioner apparatus includes disc spring，By the tensile force of disc spring，Make regulating wheel and all tight with the riser guide good contact of directive wheel on each summit，And pretightning force is provided，Thus realizing agitating device to be close to riser guide，Make agitating device cannot rock in whipping process，Do not affect again the agitating device lifting along riser guide simultaneously.
10. pretreatment stirring system according to claim 1, it is characterised in that the group number of described guide wheel device and tensioner apparatus is 6～10 groups.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610192640.6A CN105734200A (en) | 2016-03-30 | 2016-03-30 | Molten iron pretreatment stirring head slag removing method and stirring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610192640.6A CN105734200A (en) | 2016-03-30 | 2016-03-30 | Molten iron pretreatment stirring head slag removing method and stirring system |
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| CN201610192640.6A Pending CN105734200A (en) | 2016-03-30 | 2016-03-30 | Molten iron pretreatment stirring head slag removing method and stirring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119171A (en) * | 2017-05-03 | 2017-09-01 | 鞍钢集团工程技术有限公司 | A kind of ferroalloy purifier and technique |
| CN113817894A (en) * | 2020-06-21 | 2021-12-21 | 宝山钢铁股份有限公司 | Online cleaning method for sticky slag of KR desulfurization stirrer of molten iron |
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| CN103421926A (en) * | 2013-08-08 | 2013-12-04 | 中冶南方工程技术有限公司 | Intelligent control method of lifting trolley system of knotted reactor (KR) desulfurization |
| CN104645869A (en) * | 2015-03-16 | 2015-05-27 | 中冶南方工程技术有限公司 | Flexible clamping device of stirrer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2612451Y (en) * | 2003-04-25 | 2004-04-21 | 谢福胜 | Cracking caldron capable of automatically clearing the slags |
| CN102234703A (en) * | 2010-04-23 | 2011-11-09 | 宝山钢铁股份有限公司 | On-line thermal state cleaning method for accumulated burl on mechanical desulfuration stirring paddle by using knotted reactor (KR) method |
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| CN103421926A (en) * | 2013-08-08 | 2013-12-04 | 中冶南方工程技术有限公司 | Intelligent control method of lifting trolley system of knotted reactor (KR) desulfurization |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107119171A (en) * | 2017-05-03 | 2017-09-01 | 鞍钢集团工程技术有限公司 | A kind of ferroalloy purifier and technique |
| CN113817894A (en) * | 2020-06-21 | 2021-12-21 | 宝山钢铁股份有限公司 | Online cleaning method for sticky slag of KR desulfurization stirrer of molten iron |
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