CN108384914B - Stirring device and stirring method for KR desulfurization method - Google Patents

Stirring device and stirring method for KR desulfurization method Download PDF

Info

Publication number
CN108384914B
CN108384914B CN201810258336.6A CN201810258336A CN108384914B CN 108384914 B CN108384914 B CN 108384914B CN 201810258336 A CN201810258336 A CN 201810258336A CN 108384914 B CN108384914 B CN 108384914B
Authority
CN
China
Prior art keywords
stirring
guide column
flow guide
desulfurization
molten iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810258336.6A
Other languages
Chinese (zh)
Other versions
CN108384914A (en
Inventor
赵晓东
朱良
张立国
黄桂斌
江腾飞
闫小柏
高攀
刘建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qian'an Iron And Steel Co Of Shougang Corp
Beijing Shougang Co Ltd
Original Assignee
Beijing Shougang Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Shougang Co Ltd filed Critical Beijing Shougang Co Ltd
Priority to CN201810258336.6A priority Critical patent/CN108384914B/en
Publication of CN108384914A publication Critical patent/CN108384914A/en
Application granted granted Critical
Publication of CN108384914B publication Critical patent/CN108384914B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention belongs to the technical field of KR desulfurization, and discloses a stirring device for a KR desulfurization method, which comprises the following components: the stirring device comprises a driving motor, a speed reducer, a stirring rotating shaft, a stirring head, a stirring bracket and a flow guide column; the driving motor is connected with the speed reducer and is fixed on the stirring support; one end of the stirring rotating shaft is connected with the speed reducer, and the other end of the stirring rotating shaft is connected with the stirring head; the flow guide column is fixed on the stirring support and arranged side by side with the stirring rotating shaft. The invention provides a stirring device and a stirring method which can improve the stirring efficiency and reduce the consumption of a desulfurizer.

Description

Stirring device and stirring method for KR desulfurization method
Technical Field
The invention relates to the technical field of KR desulfurization, and particularly relates to a stirring device and a stirring method for a KR desulfurization method.
Background
KR (Kambara reactor) desulfurization method is the main means of the domestic and foreign molten iron pretreatment technology at the present stage, and molten iron and desulfurizer are mixed in a mechanical stirring manner, so that the dynamic condition of the desulfurization process is improved, and the aim of rapid desulfurization is fulfilled. The KR desulfurization method is widely applied to domestic and foreign iron and steel enterprises because of stable equipment and simple operation.
The KR desulfurization method requires that a refractory material stirring head is immersed into molten iron for a certain depth, and the molten iron and a desulfurizing agent are stirred to move and mixed through the high-speed rotation of the stirring head. During the stirring process, a vortex for gathering the desulfurizer is formed above the stirring head under the action of centrifugal force because of the high-speed rotation of molten iron. Only when the bottom of the vortex reaches the top of the stirring head, the desulfurizer has obvious entrainment effect so as to achieve the aim of mixing the desulfurizer and the molten iron; the optimum mixing effect can only be achieved when the bottom of the vortex is lower than the bottom of the mixing head. Therefore, the rotational speed of the stirring head needs to be high. However, since the bottom of the vortex is lower than the top of the stirring head, the mixture of molten iron and desulfurizing agent enters into the space between the blades of the stirring head and collides with the blades rotating at high speed to cause splashing. On the other hand, in the stirring process, the molten iron mainly rotates around the center of the iron ladle at a high speed, and on the surface of the molten iron, the molten iron flows to the center and develops insufficiently and turbulently. Therefore, on the surface of molten iron, the mixing of the desulfurizer and the molten iron is difficult to realize, and the desulfurizer can only complete the mixing process under the action of the paddle after entering the vortex. Meanwhile, the desulfurizer begins to polymerize after being added into the iron ladle, which affects the desulfurization effect. Therefore, the desulfurizing agent consumption tends to be high for good desulfurization effect.
Disclosure of Invention
The invention provides a stirring device and a stirring method for a KR desulfurization method, and solves the technical problems that the KR desulfurization method in the prior art is poor in desulfurization effect, high in safety risk and large in desulfurizer consumption.
In order to solve the technical problem, the invention provides a stirring device for a KR desulfurization method, which comprises: the stirring device comprises a driving motor, a speed reducer, a stirring rotating shaft, a stirring head, a stirring bracket and a flow guide column;
the driving motor is connected with the speed reducer and is fixed on the stirring support;
one end of the stirring rotating shaft is connected with the speed reducer, and the other end of the stirring rotating shaft is connected with the stirring head;
the flow guide column is fixed on the stirring support and arranged side by side with the stirring rotating shaft.
Further, the guide column is a right triangular prism.
Further, the bottom surface of the right triangular prism is an isosceles right triangle.
Further, the guide pillar includes: the steel frame and cover the refractory material layer on the steelframe.
A KR desulfurization stirring method based on the stirring device; and comprises the following steps:
lowering the stirring head and the flow guide column to a treatment position, and starting stirring;
when the stirring speed reaches the feeding rotating speed, the feeding pipe starts feeding;
after the stirring is finished, the flow guide column is lifted to the flow guide column waiting position, and the stirring head is lifted to the stirring head waiting position.
Further, the flow guide column is a straight triangular prism with an isosceles right triangle bottom surface; the inclined plane of right triangular prism sets up to the face of strikeing, leads the regional swirl region in the molten iron stirring region.
Furthermore, the range of the length of the right-angle side of the bottom surface of the flow guide column, which is D, is 0.1R < D < 0.2R;
wherein R is the radius of the iron ladle.
Further, the distance R between the diversion column and the center of the iron ladle2＝R0+ L; the range W of the distance W between the diversion column and the iron ladle wall>0.2R；
Wherein R is0Is the radius of the stirring head, L>0.2R0And R is the radius of the iron ladle.
Furthermore, the range of the depth H below the molten iron liquid level of the bottom of the guide column is 0.15m < H <0.3 m.
Further, the desulfurizer reaches the maximum distance R from the feeding point of the surface of the molten iron to the center of the iron ladle through the blanking pipe1Is equal to R2。
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the stirring device for the KR desulfurization method, the diversion columns are arranged around the rotating shaft and the stirring head of the stirring shaft, so that the stirred molten iron is damaged to form a fluid field, and the excessive accumulation of the molten iron and a desulfurizer caused by the action of centrifugal force is avoided; meanwhile, under the action of the flow guide column, a turbulent flow in a local area is formed, so that the desulfurizer is quickly mixed with the molten iron, the polymerization of the desulfurizer is inhibited, the mixing efficiency is improved, and the consumption of the desulfurizer is reduced; on the other hand, molten iron is guided to the center of the stirring vortex through the impact surface of the guide column, the mixing effect of the molten iron and the desulfurizer gathered at the center of the vortex is increased, the gathering of the desulfurizer at the center of the vortex is reduced, and the dispersion degree of the desulfurizer in the molten iron is improved. By adopting the structure arrangement of the triangular prism and the right-angled triangle, the guiding effect of the guiding column on the molten iron to the side close to the iron ladle is reduced to the minimum, and the scouring influence of the peripheral turbulence of the guiding column on the iron ladle is reduced; meanwhile, the flow velocity of molten iron at the position of the guide column is low, the influence of the molten iron on the washing of the guide column is small, the abrasion of the guide column is small, the impact moment of the molten iron on the guide column is small, and the stability of the stirring structure is maintained.
Drawings
FIG. 1 is a schematic structural diagram of a stirring device for KR desulfurization provided by the present invention;
fig. 2 is a top view of fig. 1.
Detailed Description
The embodiment of the application provides a KR is agitating unit and stirring method for desulfurization method, and it is poor to solve KR desulfurization method desulfurization effect among the prior art, and the safety risk is high, technical problem that the desulfurizer consumption is big.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, an agitating apparatus for KR desulfurization includes: the stirring device comprises a driving motor, a speed reducer, a stirring rotating shaft, a stirring head 3, a stirring support and a flow guide column 2; the driving motor is connected with the speed reducer and is fixed on the stirring support; one end of the stirring rotating shaft is connected with the speed reducer, and the other end of the stirring rotating shaft is connected with the stirring head; the flow guide column is fixed on the stirring support and arranged side by side with the stirring rotating shaft.
That is, on the basis of conventional KR agitating unit, increase a water conservancy diversion post, supplementary stirring. The diversion column and the stirring part of the stirring device are arranged side by side and act together in molten iron. Turbulence is formed in a flow field formed by stirring through the flow guide column, and the melting of the desulfurizer into molten steel is accelerated, so that the stirring efficiency is improved, the aggregation of the desulfurizer is inhibited, and the consumption of the desulfurizer is reduced.
Generally, the number of the flow guiding columns can be one, and certainly, the number of the flow guiding columns can also be multiple, and the specific number is selected according to actual needs.
Generally speaking, the guide column is a right triangular prism, and can reduce fluid corrosion to a certain extent and prolong the service life. Further, the bottom surface of the right triangular prism is an isosceles right triangle; the service life of the desulfurizer is guaranteed, meanwhile, good flow field transformation can be achieved, local turbulence is enhanced, and the mixing efficiency of the desulfurizer and the molten iron is improved.
Further, the guide pillar includes: the steel frame and cover the refractory material layer on the steelframe. Generally, as the guide column is used, the guide column is gradually eroded, the service life is shortened, and maintenance is needed; through the structure of steelframe collocation refractory material layer. Is convenient for maintenance and replacement.
Referring to fig. 1 and 2, the present embodiment further provides a stirring method based on the above device, which is described in detail below.
A KR desulfurization stirring method based on the stirring device; and comprises the following steps:
the stirring head 3 and the flow guide column 2 are lowered to a treatment position, and stirring is started;
when the stirring speed reaches the feeding rotating speed, the feeding pipe 4 starts feeding;
after the stirring is finished, the flow guide column 2 is lifted to the flow guide column waiting position, and the stirring head 3 is lifted to the stirring head waiting position.
The flow guide column 2 is a straight triangular prism with an isosceles right triangle bottom surface; the inclined surface of the right triangular prism is set as an impact surface, and the molten iron is guided to the stirring area; specifically, the stirring head stirs the vortex formed in the molten iron by the operation, and guides part of the molten iron to the vortex area through the flow guiding operation of the impact surface, so that the molten iron can be fully contacted with the desulfurizer gathered at the vortex center 5, and the stirring efficiency is improved.
Generally, the length of the right-angle side of the bottom surface of the flow guiding column 2 is in the range of 0.1R < D < 0.2R; wherein R is the radius of the iron ladle 1. On one hand, the flow guide column 2 can manufacture a turbulent flow zone in a certain area, so that the stirring effect is ensured; meanwhile, the size of the ladle is not too large, so that molten iron impacts the ladle wall and the service life is influenced.
Generally, the diversion column 2 is away from the center of the iron ladle 1 by a distance R2＝R0+ L; the range W of the distance W between the diversion column 2 and the iron ladle wall>0.2R; wherein R is0Is the radius of the stirring head, L>0.2R0And R is the radius of the iron ladle. Avoiding the turbulent flow zone from excessively scouring the ladle wall and impacting the stirring head 3.
The range of the depth H of the bottom of the diversion column 2 inserted below the liquid level of the molten iron is 0.15m < H <0.3 m. Can also avoid excessive erosion when guaranteeing stirring effect.
Further, the desulfurizer reaches the maximum distance R from the feeding point 6 on the surface of the molten iron to the center of the iron ladle through the blanking pipe1Is equal to R2. The desulfurizer can be quickly scattered by the flow guide column 2 after being put in, and is convenient to contact and mix with molten iron.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the stirring device for the KR desulfurization method, the diversion columns are arranged around the rotating shaft and the stirring head of the stirring shaft, so that the stirred molten iron is damaged to form a fluid field, and the excessive accumulation of the molten iron and a desulfurizer caused by the action of centrifugal force is avoided; meanwhile, under the action of the flow guide column, a turbulent flow in a local area is formed, so that the desulfurizer is quickly mixed with the molten iron, the polymerization of the desulfurizer is inhibited, the mixing efficiency is improved, and the consumption of the desulfurizer is reduced; on the other hand, molten iron is guided to the center of the stirring vortex through the impact surface of the guide column, the mixing effect of the molten iron and the desulfurizer gathered at the center of the vortex is increased, the gathering of the desulfurizer at the center of the vortex is reduced, and the dispersion degree of the desulfurizer in the molten iron is improved. By adopting the structure arrangement of the triangular prism and the right-angled triangle, the guiding effect of the guiding column on the molten iron to the side close to the iron ladle is reduced to the minimum, and the scouring influence of the peripheral turbulence of the guiding column on the iron ladle is reduced; meanwhile, the flow velocity of molten iron at the position of the guide column is low, the influence of the molten iron on the washing of the guide column is small, the abrasion of the guide column is small, the impact moment of the molten iron on the guide column is small, and the stability of the stirring structure is maintained.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (3)

1. A KR desulfurization stirring method is characterized in that a stirring device is used based on the KR desulfurization method;
agitating unit for KR desulfurization method includes: the stirring device comprises a driving motor, a speed reducer, a stirring rotating shaft, a stirring head, a stirring bracket and a flow guide column;
the driving motor is connected with the speed reducer and is fixed on the stirring support;
one end of the stirring rotating shaft is connected with the speed reducer, and the other end of the stirring rotating shaft is connected with the stirring head;
the flow guide column is fixed on the stirring support and is arranged in parallel with the stirring rotating shaft;
the flow guide column is a straight triangular prism with an isosceles right triangle bottom surface; the inclined surface of the right triangular prism is set as an impact surface, and the molten iron is guided to a vortex area in the stirring area;
the range of the length D of the right-angle side of the bottom surface of the flow guide column is 0.1R < D < 0.2R;
and comprises the following steps:
lowering the stirring head and the flow guide column to a treatment position, and starting stirring;
when the stirring speed reaches the feeding rotating speed, the feeding pipe starts feeding;
after stirring, lifting the flow guide column to a flow guide column waiting position, and lifting the stirring head to a stirring head waiting position;
the distance R between the diversion column and the center of the iron ladle2＝R0+ L; the range W of the distance W between the diversion column and the iron ladle wall>0.2R；
Wherein R is0Is the radius of the stirring head, L>0.2R0R is the radius of the iron ladle;
the range of the depth H below the molten iron liquid level of the bottom of the diversion column is 0.15m < H <0.3 m.
2. The KR desulfurization stirring process according to claim 1, wherein: the maximum distance R between the feeding point of the desulfurizer reaching the surface of the molten iron through the blanking pipe and the center of the iron ladle1Is equal to R2。
3. The KR desulfurization stirring method as set forth in claim 2, wherein the flow guiding column comprises: the steel frame and cover the refractory material layer on the steelframe.
CN201810258336.6A 2018-03-27 2018-03-27 Stirring device and stirring method for KR desulfurization method Active CN108384914B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810258336.6A CN108384914B (en) 2018-03-27 2018-03-27 Stirring device and stirring method for KR desulfurization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810258336.6A CN108384914B (en) 2018-03-27 2018-03-27 Stirring device and stirring method for KR desulfurization method

Publications (2)

Publication Number Publication Date
CN108384914A CN108384914A (en) 2018-08-10
CN108384914B true CN108384914B (en) 2020-04-03

Family

ID=63072782

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810258336.6A Active CN108384914B (en) 2018-03-27 2018-03-27 Stirring device and stirring method for KR desulfurization method

Country Status (1)

Country Link
CN (1) CN108384914B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109758955B (en) * 2019-01-29 2021-09-10 武汉钢铁有限公司 Molten iron self-oscillation pulse stirring desulfurization stirrer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106987682B (en) * 2016-01-20 2018-12-04 宝山钢铁股份有限公司 A kind of flow control device in KR desulfurization hot-metal bottle
CN106244759B (en) * 2016-09-13 2018-10-16 武汉钢铁有限公司 For the pretreated mechanical agitation desulfuration method of desulfurizing iron

Also Published As

Publication number Publication date
CN108384914A (en) 2018-08-10

Similar Documents

Publication Publication Date Title
CN110699508B (en) Blowing type spiral stirrer for molten iron desulphurization
JP4670762B2 (en) Method for continuous casting of molten metal
CN106244759B (en) For the pretreated mechanical agitation desulfuration method of desulfurizing iron
CN106987682B (en) A kind of flow control device in KR desulfurization hot-metal bottle
CN108384914B (en) Stirring device and stirring method for KR desulfurization method
CN204320459U (en) A kind of ore pulp pretreatment system of intensified Daqu medicament dispersion
CN204816310U (en) Stirring tank
CN111394535A (en) Step-by-step KR stirring desulfurization method for molten iron
JP2009127111A (en) Method for desulfurizing molten iron
CN105950812A (en) High-performance stirrer used for molten iron mechanical-stirring desulfuration
CN113846203B (en) Metallurgical mechanical stirring, blowing and desulfurizing stirrer
CN206425485U (en) A kind of spiral-flow type casting device based on bottom casting
CN108754074A (en) The device and method being mingled with is removed in a kind of injection coupling of mechanical agitation
KR101173098B1 (en) Method of desulfurizing molten iron
CN207646241U (en) Molten iron desulphurization stirring device
CN103768978A (en) Glass lining mixer with conical guide cylinder
CN110791615A (en) Molten iron blowing desulfurization device
CN202770248U (en) Molted iron stirrer
JP2014177674A (en) Agitator for refinery and method of refining molten iron
CN214182752U (en) Dispersion machine for coating
CN214810124U (en) Silica gel stirring device
CN214715797U (en) Stirring device capable of accelerating full dissolution and mixing of polyacrylamide particles
CN117701893B (en) Alloy melt rotary blowing refining device and method
CN208115537U (en) A kind of industrial chemicals blender
CN217127547U (en) Acid concentration self-adaptive pickling tank

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20220601

Address after: 025 Zhao'an street, Qian'an Economic Development Zone, Tangshan City, Hebei Province 064400

Patentee after: QIAN'AN IRON AND STEEL COMPANY OF SHOUGANG Corp.

Patentee after: Beijing Shougang co., ltd

Address before: 100041 No. 68, Shijingshan Road, Beijing, Shijingshan District

Patentee before: BEIJING SHOUGANG Co.,Ltd.