CN209276560U - Molten iron desulphurization stirring device with baffle structure - Google Patents

Abstract

The utility model discloses a kind of molten iron desulphurization stirring devices with baffle structure, including rotary shaft and it is fixed on rotary shaft outer peripheral edge and around the circumferentially equally distributed multiple stirring blades of rotary shaft, baffle is lined between adjacent stirring blade, baffle is fan-shaped cylinder baffle, the radial section of fan-shaped cylinder baffle is sector, and the face where sector crosssection camber line is that the face where arc surface, sector crosssection straight line is rectangular surfaces.It is evenly arranged fan-shaped cylinder baffle between stirring blade, is acted on by its occupy-place, reduces the volume in forced vortex area in molten bath in whipping process, effectively reduces desulfurizing agent in the distribution in forced vortex area, and promotes its freedom of entry vortex；By the outer arc face of the fan-shaped cylinder structure of baffle, the desulfurizing agent entered between stirring blade is set circumferentially to be guided to stirring blade, and then enter and be effectively stirred area, and it is promoted to be discharged along blade radial.

Description

Molten iron desulphurization stirring device with baffle structure

Technical field

The utility model belongs to the outer mechanical agitation desulfuration field of molten iron furnace before pneumatic steelmaking, and in particular to one kind has water conservancy diversion The molten iron desulphurization stirring device of body structure.

Background technique

KR (Kambara Reactor) stirring desulphurization method is that nippon began one's study in 1963, nineteen sixty-five application In a kind of industrial External Desulfurization Technique From Melten Iron, this sulfur method is with the cross leaf of an outer lining refractories Structure blender, which immerses, carries out rotational agitation molten iron in hot-metal bottle, so that molten iron is generated vortex, the desulfurizing agent by weighing is by being fed Device is added to molten iron surface, and is involved in molten iron by vortex, mixes, reacts with high temperature liquid iron, achievees the purpose that desulfurization.The desulfurization Method inhales circulation mixing by floating on the volume of desulfurizing agent on molten iron level, realizes the circulating contact desulfurization smelting of desulfurizing agent and molten iron Gold reaction, thus, the desulfurization agent reaction time is abundant, has desulfuration efficiency high, and sorbent consumption is few, and the activity duration is short, gold Belong to and consume low advantage, is the mechanical stirring metallurgical technology being uniquely widely applied both at home and abroad at present.However, according to domestic and international Limited KR stirring desulphurization flow regime research report, KR stirring desulphurization flow regime are divided into mixing center forced vortex area and should Free vortex flow area other than area, forced vortex area are poor mixing area due to not having the relative motion between liquid infinitesimal；And from By vortex since shuttling movement causes the relative motion between liquid infinitesimal, play the role of mixing dispersion.In reality Under the high stirring Re of production, the ratio between forced vortex area radius and agitator paddle radius are approximately 0.7, the effective mixing surface of paddle Product is only 30%, thus, molten iron KR stirring desulphurization transmission kinetic mechanism is the conjunction of local volume persorption, radial shear dispersion.Currently, Main deficiency present in KR desulfurization blender use process has: (1) due to the presence in forced vortex area, blender was being used Cheng Zhong is involved in leaf angle of the desulfurizing agent (slag) of molten iron at blender center and builds up, not only influences blender weight, stirring resistance Power, but also the stirring volume that will affect desulfurizing agent inhales the state that circulates, and deteriorates stirring desulphurization dynamic conditions and desulfurization technology Economic indicator；(2) routine KR mixing arm angle (90 °) is smaller, and the accumulation of desulfurizing agent (slag) causes the blender region resistance to Fiery material working lining surface dry slag, scarfing cinder operating difficulties, often scarfing cinder is not thorough, and leaf angle portion dry slag is caused constantly to deposit, The aggravation of refractory material working lining scarfing cinder mechanical damage, affects the service life of blender, and it is de- to be further degrading molten iron stirring The technical-economic index of sulphur；(3) in use, due to the raising of revolving speed, blender will appear a degree of blender It shakes, causes stirrer bottom refractory material to generate relative motion with the slag being located in forced vortex area, cause stirrer bottom Abrasion, further reduced the service life of blender.It can be seen that how extending stirring free vortex flow area, reducing and force The scale of vortex is that further stirring desulphurization dynamic conditions, reduction mixing arm dry slag, the raising blender of improving uses The effective way in service life.

Chinese utility model patent (Authorization Notice No. CN101492753B, authorized announcement date 2010.07.14) discloses one Kind hot-metal bottle bias stirring desulphurization method, the stirring at hot-metal bottle center is deviateed by blender, causes to stir swirl center deviation Axle center is stirred, the formation in mixing center forced vortex area when having contained conventional KR stirring desulphurization keeps the desulfurizing agent of whirlpool sucking inclined It is involved in circulation from stirring axle center asymmetry, and realizes that the desulfurizing agent being involved in is mixed in molten iron by the impact of mixing arm Dispersion is closed, so that molten iron mechanical agitation desulfuration dynamic conditions is effectively improved, although achieving in actual production good Type approval test effect promote the abrasion of hot-metal ladle and carriage brake system, increase but due to the biggish eccentric thrust of bias stirring The big maintenance workers quality of hot-metal ladle and carriage, brings difficulty to practical popularization and application；Chinese utility model patent (Authorization Notice No. CN102154533B, authorized announcement date 2012.07.25) a kind of jet-propelled blender used for molten iron mechanical stirring desulfuration is disclosed, lead to It crosses and jet channel is set between paddle, be injected to cooling gas in stirring from jet spout in blender use process Heart whirlpool promotes the relative motion in mixing center forced vortex area between desulfurizing agent and molten iron, realizes mixing center forced vortex Mixing dispersion of the desulfurizing agent in molten iron in area is flowed, the region desulphurization kinetics condition is improved, it is also possible to contain phase The delay bonding of desulfurization slag, mitigates blender dry slag cleaning and maintenance amount between adjacent paddle.But since agitator structure is complex, Processing and manufacturing difficulty is larger, has not seen that industrial application is reported at present.

Summary of the invention

The purpose of this utility model provides that a kind of stirring blade dry slag is few, structure is simple aiming at the deficiency of above-mentioned technology Single molten iron desulphurization stirring device.

To achieve the above object, with the molten iron desulphurization stirring device of baffle structure designed by the utility model, including It rotary shaft and is fixed on the rotary shaft outer peripheral edge and around the circumferentially equally distributed multiple stirring blades of the rotary shaft, it is adjacent Baffle is lined between the stirring blade, the baffle is fan-shaped cylinder baffle, the diameter of the fan-shaped cylinder baffle It is sector to section, the face where sector crosssection camber line is that the face where arc surface, sector crosssection straight line is rectangular surfaces.

Further, the circular arc radius surface of the fan-shaped cylinder baffle is b, and 0.5a≤b≤0.7a, a are stirring blade Length.

Further, the molten iron face of meeting of the stirring blade is the inclined-plane at the angle α of from bottom to top leaning forward clockwise, and α is 6 °~8 °, the back iron water surface of the stirring blade is the inclined-plane at the angle β of from bottom to top leaning forward clockwise, and α≤β≤10 ° are described The lateral surface of stirring blade is that from bottom to top diameter leans outward the inclined-plane at the angle γ, and γ is 0~2 °.

Further, the extending length of the stirring blade is 0.05~0.1 times of the stirring blade length.

Compared with prior art, the utility model has the advantage that the utility model has the molten iron of baffle structure Desulfurization blender is evenly arranged fan-shaped cylinder baffle between stirring blade, is acted on by its occupy-place, reduces whipping process The volume in middle molten bath forced vortex area effectively reduces desulfurizing agent in the distribution in forced vortex area, and promotes its freedom of entry whirlpool Flow area；Meanwhile angle between stirring blade has also been enlarged, it further limits stirring blade angle and the delay of desulfurizing agent is acted on With dry slag speed, abrasion of desulfurization (agent) slag to stirrer bottom in forced vortex area is reduced, it is effective to improve stirring blade Active area and stirring intensity；By the outer arc face of the fan-shaped cylinder structure of baffle, make de- between stirring blade Sulphur agent is circumferentially guided to stirring blade, and then enters and be effectively stirred area, and it is promoted to be discharged along blade radial；Meanwhile Outer arc face structure also effectively limits the adherency and dry slag intensity of desulfurization slag, and reduces scarfing cinder in blender maintenance process Cross caused mechanical damage.By above-mentioned measure, reach between stirring blade dry slag is few, structure is simple, it is easy to make, significantly improve The dynamic conditions of molten iron mechanical agitation desulfuration and the purpose for extending blender service life.

Detailed description of the invention

Fig. 1 is the molten iron desulphurization stirring device schematic front view that the utility model has baffle structure；

Fig. 2 is the schematic side view of Fig. 1；

Fig. 3 is the A-A diagrammatic cross-section of Fig. 1；

Fig. 4 is the middle stirring blade structural schematic diagram of Fig. 1；

Fig. 5 is the middle fan-shaped cylinder baffle structural schematic diagram of Fig. 1；

Each part numbers are as follows in figure: rotary shaft 1, stirring blade 2, fan-shaped cylinder baffle 3.

Specific embodiment

The utility model is described in further detail in the following with reference to the drawings and specific embodiments.

Molten iron desulphurization stirring device as shown in Figure 1 and Figure 2 with baffle structure, including rotary shaft 1 and it is fixed on rotation On 1 outer peripheral edge of axis and around the circumferential equally distributed multiple stirring blades 2 of rotary shaft 1, preferably three pieces or four, adjacent two stirring Baffle is lined between blade 2.In conjunction with shown in Fig. 3, Fig. 5, baffle is fan-shaped cylinder baffle 3, i.e. fan-shaped cylinder baffle 3 Radial section be sector, the face where sector crosssection camber line is that the face where arc surface, sector crosssection straight line is rectangular surfaces, and The circular arc radius surface of fan-shaped cylinder baffle is b, and 0.5a≤b≤0.7a, a are the length of stirring blade.Between stirring blade 2 It is evenly arranged fan-shaped cylinder baffle 3, is acted on by its occupy-place, the volume in forced vortex area in molten bath in whipping process is reduced, Desulfurizing agent is effectively reduced in the distribution in forced vortex area, and promotes its freedom of entry vortex；Meanwhile paddle has also been enlarged Angle between piece further limits delay effect and dry slag speed of the stirring blade angle to desulfurizing agent, reduces forced vortex Abrasion of desulfurization (agent) slag to stirrer bottom in area is flowed, stirring blade effective active area and stirring intensity are improved.Pass through The outer arc face of the fan-shaped cylinder structure of baffle makes the desulfurizing agent entered between stirring blade circumferentially be guided to paddle Piece, and then enter and be effectively stirred area, and it is promoted to be discharged along blade radial；Meanwhile outer arc face structure also effectively limits The adherency and dry slag intensity of desulfurization slag have been made, and has reduced mechanical damage caused by scarfing cinder excessively in blender maintenance process.Pass through Above-mentioned measure, reach between stirring blade dry slag is few, structure is simple, it is easy to make, significantly improve the dynamic of molten iron mechanical agitation desulfuration Mechanical condition and the purpose for extending blender service life.

In addition, as shown in connection with fig. 4, stirring blade 2 meets molten iron face as the oblique of the angle α that from bottom to top lean forward clockwise Face, α are 6 °~8 °, inclined-plane of the back iron water surface of stirring blade 2 for the angle β of from bottom to top leaning forward clockwise, α≤β≤10 °, The lateral surface of stirring blade 2 is that from bottom to top diameter leans outward the inclined-plane at the angle γ, and γ is 0~2 °.Molten iron is met by stirring blade 2 Face is the bevel structure and stirring blade extension at from bottom to top lean forward the respectively clockwise angle α and the angle β with the back iron water surface Design (i.e. the extending length of stirring blade 2 is 0.05~0.1 times of 2 length b of stirring blade), reduces the vortex of the back iron water surface Intensity improves the stirring volume of stirring blade 2 and inhales intensity, promotes desulfurizing agent to roll up along baffle and inhale downlink.

One layer of water base coating against binding slags are uniformly coated in the present embodiment on fan-shaped cylinder baffle 3, by fan-shaped column Water base coating against binding slags are brushed on body baffle 3, further decrease the dry slag between stirring blade 2, promote free vortex flow area de- Sulphur agent enters lower part free vortex flow area.

Claims (4)

1. a kind of molten iron desulphurization stirring device with baffle structure, including rotary shaft (1) and it is fixed on the rotary shaft (1) outside On periphery and between the circumferential equally distributed multiple stirring blades (2) of the rotary shaft (1), the adjacent stirring blade (2) It is lined with baffle, it is characterised in that: the baffle is fan-shaped cylinder baffle (3), the diameter of the fan-shaped cylinder baffle (3) It is sector to section, the face where sector crosssection camber line is that the face where arc surface, sector crosssection straight line is rectangular surfaces.

2. according to claim 1 with the molten iron desulphurization stirring device of baffle structure, it is characterised in that: the fan-shaped cylinder The circular arc radius surface of baffle (3) is b, and 0.5a≤b≤0.7a, a are the length of stirring blade.

3. according to claim 1 with the molten iron desulphurization stirring device of baffle structure, it is characterised in that: the stirring blade (2) molten iron face of meeting is the inclined-plane at the angle α of from bottom to top leaning forward clockwise, and α is 6 °~8 °, the back of the stirring blade (2) Molten iron face is the inclined-plane at the angle β of from bottom to top leaning forward clockwise, and the lateral surface of α≤β≤10 °, the stirring blade (2) is served as reasons Lower and upper diameter leans outward the inclined-plane at the angle γ, and γ is 0~2 °.

4. according to claim 1 with the molten iron desulphurization stirring device of baffle structure, it is characterised in that: the stirring blade (2) extending length is 0.05~0.1 times of the stirring blade (2) length.