CN208933404U - Rotary blowing combined type desulfurization agitator head for hot metal and molten iron desulphurization stirring device - Google Patents
Rotary blowing combined type desulfurization agitator head for hot metal and molten iron desulphurization stirring device Download PDFInfo
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- CN208933404U CN208933404U CN201821570143.6U CN201821570143U CN208933404U CN 208933404 U CN208933404 U CN 208933404U CN 201821570143 U CN201821570143 U CN 201821570143U CN 208933404 U CN208933404 U CN 208933404U
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- hot metal
- agitator head
- type desulfurization
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Abstract
The utility model relates to a kind of rotary blowing combined type desulfurization agitator head for hot metal, agitating paddle including agitating shaft and on agitating shaft, strength conveying channel is formed in agitating shaft and in offering at least one spray orifice being connected to strength conveying channel on agitating shaft, each spray orifice is respectively positioned below agitating paddle.In addition also provide it is a kind of include the rotary blowing combined type desulfurization agitator head for hot metal molten iron desulphurization stirring device.Desulfurizing agent powder can be sprayed into molten bath deep by the strength conveying channel inside agitating shaft, and powder particles is made to obtain enough kinetic energy and be able to penetrate metal interface, effectively improved desulfurization effect, will not be generated charging flue dust；Since spray orifice is located at below agitating paddle, powder particles can be extended in the floating path of bath, guarantee desulfurization effect, it is ensured that the whirlpool that desulfurizing agent powder can fully be stirred paddle formation captures, dispersion effect of the reinforcing desulfuration agent powder particles in bath.
Description
Technical field
The utility model belongs to technical field of hot metal pretreatment, and in particular to a kind of rotary blowing combined type desulfurizing iron stirs
It mixes head and includes the molten iron desulphurization stirring device of the rotary blowing combined type desulfurization agitator head for hot metal.
Background technique
Currently, conventional mechanical stirs desulfurizing iron preprocessing process, generallys use primary at the top of iron bath or add in batches
Enter the feed way of desulfurizing agent powder, powder falls into weld pool surface by gravity via the elephant trunk being set to above molten bath.Due to de-
Sulphur agent powder density ratio molten iron density is small and swims in above bath surface, then, has been immersed in bath, main
The conventional mechanical stirring-head to be made of agitating shaft and blade starts to rotate, and generates vortex motion in bath, swims in
Powder above bath surface is gradually rolled into bath by downward vortex motion, and participates in desulphurization reaction.
However, this feed way will cause some problems: on the one hand, desulfurizing agent powder adds to high temperature liquid iron weld pool surface
When can generate volume of smoke, in the case where dedusting condition is bad, is easily spread around operating area, endanger operating environment；
On the other hand, tiny powder particles are during falling to bath surface, are easy being drawn and be directly entered dedusting with dedusting wind
System is not engaged in desulphurization reaction process, causes damages.
In addition, the vortex that bath stirring generates, is involved in limited strength to what the powder above bath surface generated, leads
Cause to only have part powder and be rolled into bath, and the process of being involved in take a long time, be involved in bath depth it is shallower.Herein
In the process, the desulfurizing agent powder particles for floating on weld pool surface, easily assemble agglomerating under high temperature action, increase actual participation
The particle size of desulphurization reaction, to reduce the interfacial area of solid-liquid reaction and the amounts of particles of actual participation reaction.These because
It is influenced caused by plain, is eventually exhibited as conventional mechanical stirring desulfurizing iron preprocessing process sorbent utilization low SI.
Utility model content
The utility model embodiment is related to a kind of rotary blowing combined type desulfurization agitator head for hot metal and includes the rotation spray
The molten iron desulphurization stirring device for blowing combined type desulfurization agitator head for hot metal, can at least solve the segmental defect of the prior art.
The utility model embodiment is related to a kind of rotary blowing combined type desulfurization agitator head for hot metal, including agitating shaft and is set to
Agitating paddle on the agitating shaft is formed with strength conveying channel in the agitating shaft and in offering on the agitating shaft and institute
At least one spray orifice of strength conveying channel connection is stated, each spray orifice is respectively positioned below the agitating paddle.
As one of embodiment, the cooling duct for cooling down to it is formed in the agitating shaft.
As one of embodiment, the agitating shaft is with hollow cooling chamber and intracavitary equipped with cooling Jie in the hollow cooling
Matter pipe, hollow cooling chamber connection constitutes the cooling duct outside the cooling medium Guan Yuguan.
As one of embodiment, strength conveying channel includes strength conveying pipeline, and the cooling medium pipe sleeve is set to institute
It states outside strength conveying pipeline, and strength conveying pipeline bottom is pierced by cooling medium tube bottom end and is extremely connected to each spray orifice.
As one of embodiment, the hollow cooling bottom of chamber end is located above the agitating paddle bottom end.
As one of embodiment, the agitating paddle includes multiple blades, encloses between every adjacent two blade and sets to form one
Groove profile area, the axis of each spray orifice intersect with the groove profile area region of elongation adjacent to the spray orifice.
As one of embodiment, the spray orifice has multiple and sets along the agitating shaft circumferential direction uniform ring.
As one of embodiment, the agitating shaft includes mandrel, strength conveying pipeline and the paddle set on the mandrel bottom
Ye Xin, the strength conveying pipeline is arranged in vertically on the mandrel and bottom end is located at outside the mandrel to constitute the pneumatic transporting
Expect channel, the mandrel outer wall, the blade outer core and the exposed strength conveying pipeline outer wall are equipped with refractory material layer.
As one of embodiment, each spray orifice is set on the side wall of the agitating shaft.
The utility model embodiment is related to a kind of molten iron desulphurization stirring device, including rotary blowing combined type as described above
Desulfurization agitator head for hot metal, the agitating shaft be connected with for drive its rotate rotary drive mechanism and for driving its lifting
Lift drive mechanism.
The utility model embodiment at least has the following beneficial effects:
Rotary blowing combined type desulfurization agitator head for hot metal provided by the utility model, by the way that strength is arranged inside agitating shaft
Desulfurizing agent powder injection can be entered molten bath deep by conveying channel, and powder particles is made to obtain foot before leaving spray orifice outlet
Enough kinetic energy participates in desulphurization reaction into molten bath deep, effectively improves desulfurization effect, substantially to be able to penetrate metal interface
Charging flue dust will not be led to the problem of.Since spray orifice is located at below agitating paddle, powder particles on the one hand can be extended in molten bath
The floating path in portion, namely extend residence time of the desulfurizing agent powder in molten bath, guarantees desulfurization effect, on the other hand, can be with
Guarantee that desulfurizing agent powder can fully be stirred the whirlpool capture of paddle formation, reinforcing desulfuration agent powder particles are in bath
Dispersion effect.To sum up these technical effects, totally can achieve improves operating environment, accelerates desulfurizing iron process, improves desulfurization
The effect of the treating capacity of agent utilization rate, reduction sorbent consumption and desulfurization slag, to effectively save desulphurization cost.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram of rotary blowing combined type desulfurization agitator head for hot metal provided by the embodiment of the utility model；
Fig. 2 is the cross-sectional view of A-A in Fig. 1；
Fig. 3 is the structural schematic diagram for the molten iron desulphurization stirring device that the utility model embodiment two provides.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
Such as Fig. 1 and Fig. 2, the utility model embodiment provides a kind of rotary blowing combined type desulfurization agitator head for hot metal 100, packet
Agitating shaft 104 and the agitating paddle 106 on the agitating shaft 104 are included, strength conveying channel is formed in the agitating shaft 104
And in offering at least one spray orifice 107 being connected to strength conveying channel, each spray orifice on the agitating shaft 104
107 are respectively positioned on 106 lower section of agitating paddle.It is easy-to-understand to, above-mentioned strength conveying channel is therein for carrying out strength conveying
Material is desulfurizing agent powder, using carrier gas as carrier, can be sprayed into molten bath by each spray orifice 107, and above-mentioned carrier gas can be nitrogen etc.
Inert gas.
Rotary blowing combined type desulfurization agitator head for hot metal 100 provided in this embodiment, by being arranged inside agitating shaft 104
Desulfurizing agent powder injection can be entered molten bath deep by strength conveying channel, and make powder particles before leaving spray orifice 107 and exporting
Enough kinetic energy is obtained, to be able to penetrate metal interface, desulphurization reaction is participated in into molten bath deep, effectively improves desulfurization effect
Fruit basically will not produce the problem of feeding flue dust.Since spray orifice 107 is located at 106 lower section of agitating paddle, powder on the one hand can be extended
Particle is in the floating path of bath, namely extends residence time of the desulfurizing agent powder in molten bath, guarantees desulfurization effect, separately
On the one hand, it is ensured that the whirlpool that desulfurizing agent powder can fully be stirred the formation of paddle 106 captures, reinforcing desulfuration agent powder
Dispersion effect of the grain in bath.To sum up these technical effects, totally can achieve improves operating environment, accelerates desulfurizing iron
Process, the effect for improving sorbent utilization, the treating capacity for reducing sorbent consumption and desulfurization slag, to effectively save desulfurization
Cost.
Advanced optimize the structure of above-mentioned rotary blowing combined type desulfurization agitator head for hot metal 100, shape in the agitating shaft 104
At the cooling duct having for cooling down to it, by circulating in the cooling channel, cooling medium can cool down agitating shaft 104,
The operating temperature for reducing stirring-head 100, can effectively improve the service life of the desulfurization agitator head 100.Preferably, such as Fig. 1,
The agitating shaft 104 is with hollow cooling chamber and intracavitary equipped with cooling medium pipe 103, the cooling medium in the hollow cooling
Pipe 103 is connected to the composition cooling duct with outer hollow cooling chamber is managed.It wherein, is cylindrical tube with cooling medium pipe 103, hollow cold
But chamber is cylindrical chamber, and cooling medium pipe 103, hollow cooling chamber and agitating shaft 104 are coaxial for preferred embodiment, can be with
Guarantee uniformly cools down 104 inner wall of agitating shaft of 103 surrounding of cooling medium pipe.The cooling medium pipe 103 and 104 inner wall of agitating shaft
It encloses and sets to form the cold chamber of ring, 103 bottom end of cooling medium pipe is connected to the cold chamber of the ring, and cooling medium is pushed up from the cooling medium pipe 103
End enters, and flows out into the cold chamber of ring from 103 bottom end of cooling medium pipe, so that above-mentioned cooling duct is formed, the cold chamber of the ring
As the return flow line of cooling medium, the low-temperature cooling media that guarantees constantly to circulate in agitating shaft 104 is to guarantee cooling effect.
It is further preferred that but chamber extends downward at agitating paddle 106 above-mentioned hollow cold, can be to agitating paddle such as Fig. 1
106 are cooled down.Generally, above-mentioned agitating shaft 104 includes metal core axle, and above-mentioned agitating paddle 106 includes Metal Rotor Blade core, metal
Blade core is mounted on metal core axle bottom, can be cooled down to Metal Rotor Blade core by heat transfer；Moreover, hollow cooling chamber to
Under extend at agitating paddle 106, above-mentioned 103 bottom end of cooling medium pipe also extends at agitating paddle 106, so that the cooling of low temperature is situated between
Matter, to deeply cooling down to 104 bottom of agitating shaft of bath and Metal Rotor Blade core, guarantees to stirring-head in first time
100 cooling effect.
Above-mentioned cooling medium preferably uses gas cooling, such as compressed air, nitrogen, securely and reliably, will not pollute
Molten iron will not occur the cooling mediums such as cooling water enter molten iron and occur explosion etc..
It is appreciated that above-mentioned strength conveying channel can be the column circular passage for being located on above-mentioned hollow cold but chamber periphery,
The circulation of desulfurizing agent powder and the circulation of cooling medium are taken their own roads, non-interference.In the present embodiment, implement as preferred
Example, such as Fig. 1, strength conveying channel includes strength conveying pipeline 102, and the cooling medium pipe 103 is sheathed on the pneumatic transporting
Outside expects pipe 102, and 102 bottom of strength conveying pipeline is pierced by 103 bottom end of cooling medium pipe and connects to each spray orifice 107
It is logical.For the structure convenient for being designed and arranged, structure is simple and compact, does not influence the form construction design of stirring-head 100, does not need pair
Existing desulfurizing iron equipment is adjusted.During desulfurizing agent powder downlink, the intracavitary cooling medium of hollow cooling can be right
Desulfurizing agent powder is cooled down, and the cooled desulfurizing agent powder in this part then can be to hollow cold but chamber strength conveying pipeline below
102 are cooled down, and the service life of the component of the lower section of agitating paddle 106 is improved, meanwhile, this partial desulfurization agent powder with hollow cold
But it is heated in chamber 102 heat exchanging process of strength conveying pipeline below, the temperature drop of molten iron can be avoided.
In summary structure, it is a kind of preferable that hollow cooling bottom of chamber end, which is set as being located above 106 bottom end of agitating paddle,
100 structure of stirring-head can both guarantee the cooling effect to key members such as agitating paddles 106, cold without being arranged in blade in-core
But runner guarantees the structural strength of agitating paddle 106, reduces device fabrication difficulty, while can be to avoid the desulfurizing agent powder of ejection
Temperature is too low and causes hot metal temperature drop excessive；Both it can be used as novel 100 structure of stirring-head design, can also have been stirred existing
It is transformed on the basis of mixing first 100.It is further preferred that the agitating shaft 104 includes mandrel, strength conveying pipeline such as Fig. 1
102 and the blade core set on the mandrel bottom, the strength conveying pipeline 102 is arranged on the mandrel vertically and bottom end position
In outside the mandrel to constitute strength conveying channel, the mandrel outer wall, the blade outer core and exposed described
102 outer wall of strength conveying pipeline is equipped with refractory material layer 105.In the present embodiment, above-mentioned mandrel, blade core, cooling medium pipe
103 is equal using the production of Q235 seamless steel pipe, and above-mentioned strength conveying pipeline 102 is using No. 20 seamless steel pipes production, above-mentioned each spray orifice 107
Both preferably being made of 304 stainless steel tubes, above-mentioned refractory material layer 105 is poured using mullite corundum matter castable,
Higher structural strength, preferable using effect and longer service life can be obtained.
Advanced optimize the structure of above-mentioned rotary blowing combined type desulfurization agitator head for hot metal 100, such as Fig. 1, the agitating paddle
106 include multiple blades, sets to form a groove profile area per enclosing between adjacent two blade, the axis of each spray orifice 107 with
Adjacent to the groove profile area region of elongation intersection of the spray orifice 107.That is, the axis of each spray orifice 107 is positioned adjacent to the spray orifice
In the groove profile area that the extension of 107 two blades is surrounded.Based on the structure, it is possible to reduce spray orifice 107 go out gas body and
Thermal shock of the molten iron that gas body floating drives out to 106 leaf of top agitating paddle, further increase agitating paddle 106 uses the longevity
Life.
It is further preferred that the spray orifice 107 has multiple and sets along the circumferential uniform ring of the agitating shaft 104, guarantee desulfurization
Agent powder equably sprays into molten bath and improves the dispersion degree in molten bath.2 or 4 sprays can be set according to actual needs
Hole 107；Certainly, it can also be set as needed more, can be used Multi-layers distributing mode, 2 or 4 spray orifices 107 of every layer arrangement, this
Place does not repeat one by one.It is further preferred that each spray orifice 107 is set to the side wall of the agitating shaft 104 such as Fig. 1 and Fig. 2
On, it may make desulfurizing agent powder to disperse to 104 surrounding of agitating shaft, and the whirlpool for being easy to be stirred the formation of paddle 106 captures；Spray orifice
107 blowing direction can be horizontal direction, be also possible to spray downwards, wherein being preferred with horizontal direction.
In addition, in the settable connecting flange 101 in the top of agitating shaft 104, driving structure for the rotation with peripheral hardware such as Fig. 1
Part connection.
Embodiment two
The utility model embodiment is related to a kind of molten iron desulphurization stirring device, including rotates provided by above-described embodiment one
It is blown combined type desulfurization agitator head for hot metal 100, the specific structure of the desulfurization agitator head 100 does not repeat herein；The agitating shaft
104 are connected with the rotary drive mechanism 400 for driving it to rotate and the lift drive mechanism for driving it to go up and down.
Preferably, above-mentioned agitating shaft 104 is connect by Hooks coupling universal coupling 300 with the output end of rotary drive mechanism 400, is used
The Hooks coupling universal coupling 300 of flexibly jointed chain replaces traditional rigid connection mode, and stirring-head 100, can be while rotary motion
Small size swing is done in hot-metal bottle, so that the stirring range of stirring-head 100 is increased, so that desulphurization reaction is more sufficiently, more thoroughly；By
It can be swung in hot-metal bottle with external force in stirring-head 100, reduce molten iron to the erosion of washing away of stirring-head 100, to reduce
The erosion rate of stirring-head 100；Since Hooks coupling universal coupling 300 belongs to flexibly jointed chain, molten iron to the active force of stirring-head 100 without
Method is transmitted on lift cart 501, is impacted by lift cart 501 to prevent stirring platform 600 and is generated vibration or loosening
The phenomenon that, keep whole equipment more reliable and more stable；The fixed support etc. for eliminating corresponding agitating shaft 104 simultaneously, makes equipment knot
Structure is more succinct, is easily installed and safeguards.
The device structure of this field routine can be used in above-mentioned rotary drive mechanism 400 and lift drive mechanism, such as:
Rotary drive mechanism 400 use rotary drive motor+speed reducer form, then speed reducer therein with it is above-mentioned universal
Shaft coupling 300 connects；
Above-mentioned lift drive mechanism uses the form of lift cart 501, for driving stirring-head 100, Hooks coupling universal coupling 300
And the oscilaltion together of rotary drive mechanism 400, such as Fig. 3, the lift drive mechanism include lift cart 501, are set to stir and put down
Fluctuating orbit on platform 600 and the elevation driving unit for driving lift cart 501 to go up and down along fluctuating orbit, rotation driving
Mechanism 400 is arranged on lift cart 501.It is easy-to-understand to, fluctuating orbit is 501 row of lift cart of vertically extending setting
Track is walked, walks for lift cart 501, the walking manners such as roller type, slide block type can be used；Above-mentioned elevation driving unit is preferably
It is driven using hoist engine 502, hoist engine 502 is arranged on stirring platform 600, the lift rope and lift cart 501 of hoist engine 502
Connection.The specific connection structure between each unit in the lift drive mechanism is not described in detail one by one herein, is all ability
Domain conventional technical means.
Certainly, above-mentioned rotary drive mechanism 400 and lift drive mechanism are not limited to above structure, and others still can be used
Driving method, for example, cylinder/hydraulic cylinder isoline driving equipment can also be used for rotary drive mechanism 400 and transmission mechanism cooperates
Etc. modes, lift drive mechanism cylinder/hydraulic cylinder/screw body isoline driving equipment etc. can also be used, do not make herein one by one
It repeats.
It is further preferred that above-mentioned agitating shaft 104 is connect with a rotary shaft 200 such as Fig. 3, based on it is above-mentioned be provided with it is universal
The structure of shaft coupling 300, the rotary shaft 200 are connect with Hooks coupling universal coupling 300, and rotation is arranged preferably in the rotary shaft 200
Connector 201, the rotary joint 201 have the cooling medium entrance being connected to cooling medium pipe 103 and connect with hollow cooling chamber
The pneumatic material entrance that logical cooling medium is exported and is connected to strength conveying channel, rotary joint 201 guarantee in rotary shaft
It will not there is a situation where media for pipe in rotary shaft 200 in 200 rotary courses.Rotary joint 201 is existing equipment, tool
Body structure does not repeat herein.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. a kind of rotary blowing combined type desulfurization agitator head for hot metal, the agitating paddle including agitating shaft and on the agitating shaft,
It is characterized by: being formed with strength conveying channel in the agitating shaft and in being offered on the agitating shaft and the strength conveying
At least one spray orifice of channel connection, each spray orifice are respectively positioned below the agitating paddle.
2. rotary blowing combined type desulfurization agitator head for hot metal as described in claim 1, it is characterised in that: shape in the agitating shaft
At the cooling duct having for being cooled down to it.
3. rotary blowing combined type desulfurization agitator head for hot metal as claimed in claim 2, it is characterised in that: the agitating shaft has
Hollow cooling chamber and cooling medium pipe is equipped in the hollow cooling is intracavitary, hollow cooling chamber connects outside the cooling medium Guan Yuguan
It is logical to constitute the cooling duct.
4. rotary blowing combined type desulfurization agitator head for hot metal as claimed in claim 3, it is characterised in that: the strength conveying is logical
Road includes strength conveying pipeline, and the cooling medium pipe sleeve is set to outside the strength conveying pipeline, and strength conveying pipeline bottom is worn
Cooling medium tube bottom end is extremely connected to each spray orifice out.
5. rotary blowing combined type desulfurization agitator head for hot metal as described in claim 3 or 4, it is characterised in that: the hollow cold
But bottom of chamber end is located above the agitating paddle bottom end.
6. rotary blowing combined type desulfurization agitator head for hot metal as described in claim 1, it is characterised in that: the agitating paddle includes
Multiple blades set to form a groove profile area per enclosing between adjacent two blade, the axis of each spray orifice with adjacent to the spray
Intersect the groove profile area region of elongation in hole.
7. rotary blowing combined type desulfurization agitator head for hot metal as described in claim 1 or 6, it is characterised in that: the spray orifice has
It is multiple and set along the agitating shaft circumferential direction uniform ring.
8. rotary blowing combined type desulfurization agitator head for hot metal as described in claim 1, it is characterised in that: the agitating shaft includes
Mandrel, strength conveying pipeline and the blade core set on the mandrel bottom, the strength conveying pipeline are arranged in the mandrel vertically
It is outer to constitute strength conveying channel that upper and bottom end is located at the mandrel, the mandrel outer wall, the blade outer core and
The exposed strength conveying pipeline outer wall is equipped with refractory material layer.
9. rotary blowing combined type desulfurization agitator head for hot metal as claimed in claim 1 or 8, it is characterised in that: each spray orifice
On the side wall of the agitating shaft.
10. a kind of molten iron desulphurization stirring device, it is characterised in that: including rotation spray as claimed in any one of claims 1-9 wherein
Blow combined type desulfurization agitator head for hot metal, the agitating shaft is connected with rotary drive mechanism for driving it to rotate and for driving
Move the lift drive mechanism of its lifting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821570143.6U CN208933404U (en) | 2018-09-26 | 2018-09-26 | Rotary blowing combined type desulfurization agitator head for hot metal and molten iron desulphurization stirring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821570143.6U CN208933404U (en) | 2018-09-26 | 2018-09-26 | Rotary blowing combined type desulfurization agitator head for hot metal and molten iron desulphurization stirring device |
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| CN208933404U true CN208933404U (en) | 2019-06-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643776A (en) * | 2019-09-29 | 2020-01-03 | 武汉钢铁有限公司 | Sealed follow-up powder conveying device |
| CN112029960A (en) * | 2020-08-31 | 2020-12-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Molten iron blowing stirring head and composite blowing method |
| CN112191206A (en) * | 2020-09-21 | 2021-01-08 | 常宁市华兴冶化实业有限责任公司 | A purifier for zinc sulfate production |
-
2018
- 2018-09-26 CN CN201821570143.6U patent/CN208933404U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643776A (en) * | 2019-09-29 | 2020-01-03 | 武汉钢铁有限公司 | Sealed follow-up powder conveying device |
| CN112029960A (en) * | 2020-08-31 | 2020-12-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Molten iron blowing stirring head and composite blowing method |
| CN112191206A (en) * | 2020-09-21 | 2021-01-08 | 常宁市华兴冶化实业有限责任公司 | A purifier for zinc sulfate production |
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