CN207591693U - A kind of wet type Double shaft stirring system - Google Patents
A kind of wet type Double shaft stirring system Download PDFInfo
- Publication number
- CN207591693U CN207591693U CN201721660655.7U CN201721660655U CN207591693U CN 207591693 U CN207591693 U CN 207591693U CN 201721660655 U CN201721660655 U CN 201721660655U CN 207591693 U CN207591693 U CN 207591693U
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- China
- Prior art keywords
- paddle
- agitating shaft
- agitator
- wet type
- spray tube
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- 238000003756 stirring Methods 0.000 title claims abstract description 93
- 239000007921 spray Substances 0.000 claims abstract description 59
- 239000004744 fabric Substances 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 239000010881 fly ash Substances 0.000 abstract description 11
- 230000002708 enhancing Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 31
- 239000002956 ash Substances 0.000 description 10
- 238000009825 accumulation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000001808 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 210000000481 Breast Anatomy 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000000737 periodic Effects 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000012257 stirred material Substances 0.000 description 1
Abstract
The utility model discloses a kind of wet type Double shaft stirring systems, belong to blender field.The utility model includes agitator, the first agitating shaft and the second agitating shaft of longitudinal direction are equipped in agitator, first agitating shaft and the second agitating shaft are connected and are driven by it with actuating unit respectively, first agitating shaft and the second agitating shaft upper edge short transverse are respectively equipped with the stirring blade being evenly spaced on, stirring blade includes adjacent have a down dip paddle and the paddle that raises up being distributed up and down successively, the paddle that has a down dip extends obliquely downward, and the paddle that raises up tilts upward extension；Short transverse is provided with multi-stage spray pipe on the outside of agitator, every grade of spray tube is circumferentially surrounded on agitator side wall, and uniform intervals are equipped with multiple nozzles on every grade of spray tube, and nozzle is extended into inside agitator and is in tilted layout.The utility model overcomes the shortcomings of that fly ash in electric power plant mixing effect is bad in the prior art and in-situ production environment is poor, can effectively enhance flyash mixing uniformity, and reduce airborne dust, improves site environment.
Description
Technical field
The utility model is related to blender technical field, more specifically to a kind of wet type Double shaft stirring system.
Background technology
The comprehensive utilization of flyash is mainly completed by wet mixer in coal-burning power plant, is generally adopted in industry at present
It is stirred with horizontal-type biaxial, the mode of top spray, causes dry ash damping ineffective, be not easily cleaned there are dust stratification blocking, buck
Many deficiencies such as stirring is uneven, airborne dust is larger, equipment leakage powder is serious, takes up a large area, to the consumption of enterprise electrical energy, water resource compared with
Greatly, in-situ production environment is influenced, influences enterprise's productivity effect.
Through retrieval, Chinese Patent Application No.：2008101730773, the applying date：On November 26th, 2008, innovation and creation name
Referred to as：A kind of vertical stirring device and stirring means, this application discloses a kind of vertical stirring devices, at least have one
The pulp surface of meeting of the mixing blade of a horizontal stretching has along the downward angle of inclination in direction of rotation, which can stir
In by bringing partial air into the material being stirred to being stirred material and impose the strength seethed upwards.Meeting pulp surface has
Along the mixing blade at the downward angle of inclination in direction of rotation, the mounting structure of pulp surface angle is met using adjustable its and is fixed.Meet slurry
There is the mixing blade along the downward angle of inclination in direction of rotation to have multi-disc, and symmetrical, layered arrangement in face.This application passes through it
The design of stirring blade mounting structure allows it to meet the angle of pulp surface and adjusts, when meet pulp surface be adjusted in oblique direction towards
During mortar, in the high speed motions of stirring blade, mortar can be dug upwards, contacted with air, and bring air into.
For another example Chinese Patent Application No.：2012104563938, the applying date：On November 14th, 2012, invention and created name
For：Continuous vertical stirs pulverizer, and this application discloses a kind of continuous verticals to stir pulverizer, mainly by deceleration electric
Machine, shaft coupling, upper bearing (metal), lower bearing, agitating shaft, cylinder, blade fix disk, revolving vane, fixed blades and elastic shock attenuation dress
Composition is put, agitating shaft is installed in the upper and lower bearing on cylinder and fixes peace with shaft coupling in the overhanging upper end section of agitating shaft
Decelerator or hydraulic motor are filled, the cylinder inner segment of the agitating shaft is regular polygon shaft part, in the regular polygon axis of this agitating shaft
Compartment of terrain is evenly distributed in section from top to bottom and fixes suit blade fixation disk, fixes on the regular polygon disk of disk in each blade and uniformly fixes
Revolving vane is installed, wear-resistant liner is fixedly mounted on the inner wall of cylinder, the compartment of terrain circumference from top to bottom on the inner wall of cylinder
Fixed blades are uniformly fixedly mounted, the relative motion of revolving vane and fixed blades makes material reach stirring while crushing
The effect of mixing.
More than application case be can yet be regarded as a kind of excellent stirring scheme, but it is difficult to be directly applied in power plant to flyash
Wet type stirring, mixing effect also still has the space of promotion.
Utility model content
1. utility model technical problems to be solved
The bad and produced on-site ring the purpose of the utility model is to overcome fly ash in electric power plant mixing effect in the prior art
The deficiency of border difference provides a kind of wet type Double shaft stirring system, can effectively enhance flyash mixing uniformity, and reduce and raise
Dirt improves site environment.
2. technical solution
In order to achieve the above objectives, technical solution provided by the utility model is：
A kind of wet type Double shaft stirring system of the utility model is equipped with the first of longitudinal direction including agitator, in agitator and stirs
Axis and the second agitating shaft are mixed, the first agitating shaft and the second agitating shaft are connected and are driven by it with actuating unit respectively, the first stirring
Axis and the second agitating shaft upper edge short transverse are respectively equipped with the stirring blade being evenly spaced on, and stirring blade includes adjacent successively
The paddle that has a down dip being distributed up and down is with the paddle that raises up, and the paddle that has a down dip extends obliquely downward, and the paddle that raises up, which tilts upward, to be prolonged
It stretches；Short transverse is provided with multi-stage spray pipe on the outside of agitator, every grade of spray tube is circumferentially surrounded on agitator side wall, often
Uniform intervals are equipped with multiple nozzles on grade spray tube, and nozzle is extended into inside agitator and is in tilted layout.
Further, it is circumferentially uniformly provided with three row stirring blades respectively on the first agitating shaft and the second agitating shaft, often
Row stirring blade includes adjacent have a down dip paddle and the paddle that raises up being distributed up and down successively.
Further, the stirring blade of the first agitating shaft and the second agitating shaft top position is to tilt down under extension
Incline paddle.
Further, the stirring blade on the second agitating shaft be located on the first agitating shaft two neighboring stirring blade it
Between.
Further, raise up between paddle and vertical direction angle β not less than have a down dip paddle and vertical direction it
Between angle α.
Further, the angle β between paddle and vertical direction that raises up is 40 ° -70 °.
Further, three-level spray tube is disposed with along short transverse on the outside of agitator, the respectively first order sprays
Pipe, second level spray tube and third level spray tube；Nozzle on every grade of spray tube is obliquely installed, and on adjacent two-stage spray tube
Nozzle inclined direction it is opposite.
Further, the nozzle on first order spray tube is obliquely installed upwards.
Further, it is equipped with flow valve on every grade of spray tube.
Further, it is connected at the top of agitator by unloading grey channel with grey library, unloads grey channel equipped with insertion plate door；Stirring
Bottom of the barrel is equipped with discharge port, and flexible cloth bag is coated on the outside of discharge port.
3. advantageous effect
Using technical solution provided by the utility model, compared with prior art, have the advantages that：
(1) a kind of wet type Double shaft stirring system of the utility model, using vertical double-shaft stirring structure, floor space is small,
Unload ash it is more smooth, resistance is less, and dust stratification situation is obviously improved, and is effectively improved by stirring blade and being equipped with for spray tube
The wet type mixing uniformity of flyash, and airborne dust generation is reduced, production environment is improved, improves productivity effect.
(2) a kind of wet type Double shaft stirring system of the utility model, each column stirring blade divide up and down including adjacent successively
Have a down dip paddle and the paddle that raises up of cloth, when wet type stirs, the paddle that has a down dip causes material whereabouts trend, and raise up paddle
Material can then be raised upwards, formed the hybrid stirring of top-bottom cross, to material raise repeatedly and whereabouts makes material in bucket
Keep good circulation stirring, will not cause material set point accumulation can not mixing situation, effectively increase material stirring
Uniformity.
(3) a kind of wet type Double shaft stirring system of the utility model, the first agitating shaft and the second agitating shaft top position
Stirring blade is set as tilting down the paddle that has a down dip of extension, and can carry out effective water conservancy diversion to the flyash being initially entered makes its fast
Speed falls, and prevents it from being raised up to form airborne dust by clamping stagnation, and material accumulation on the stirring blade of top can be prevented to be difficult to be mixed.
(4) a kind of wet type Double shaft stirring system of the utility model, the angle β between paddle and vertical direction that raises up be not small
In the angle α between paddle and vertical direction that has a down dip, fully raising up to lower part material can be ensured, further strengthen object up and down
Cross-mixing uniformity between material.
(5) a kind of wet type Double shaft stirring system of the utility model, the stirring blade on the second agitating shaft are stirred positioned at first
It mixes on axis between two neighboring stirring blade, stirring blade during stirring on two agitating shafts will not contact with each other but keep intersecting
State is spaced apart, the mutual cooperation of two agitating shafts effectively increases the distribution density of stirring blade, material can be carried out
The intersection stirring more refined, further improves mixing uniformity.
(6) a kind of wet type Double shaft stirring system of the utility model, agitator outside are provided with multistage spray along short transverse
Shower pipe, every grade of spray tube are circumferentially surrounded on agitator side wall, and uniform intervals are equipped with multiple nozzles on every grade of spray tube, are realized
To 360 ° of all standing sprays in bucket, dry ash damping uniformity is helped to improve.
(7) a kind of wet type Double shaft stirring system of the utility model, the nozzle inclined direction phase on adjacent two-stage spray tube
It to setting, is matched with being obliquely installed for stirring blade, not only spray area bigger, dry ash damping are equal for the tilting spray of moisture
Even property effect is more preferable, additionally aids souring of the enhancing to material and stirring blade, and the accumulation for reducing material bonds.
Description of the drawings
Fig. 1 is a kind of structure diagram of wet type Double shaft stirring system of the utility model；
Fig. 2 is the overlooking the structure diagram of agitator in the utility model.
Label declaration in schematic diagram：1st, Hui Ku；101st, grey channel is unloaded；102nd, insertion plate door；2nd, agitator；201st, it first stirs
Mix axis；202nd, the second agitating shaft；203rd, raise up paddle；204th, have a down dip paddle；205th, discharge port；206th, stretch cloth bag；3、
Actuating unit；401st, first order spray tube；402nd, second level spray tube；403rd, third level spray tube；404th, flow valve；405th, it sprays
Head.
Specific embodiment
To further appreciate that the content of the utility model, the utility model is described in detail with reference to attached drawing.
With reference to embodiment, the utility model will be further described.
Embodiment 1
As depicted in figs. 1 and 2, a kind of wet type Double shaft stirring system of the present embodiment, including agitator 2,2 top of agitator
It is connected by unloading grey channel 101 with grey library 1, grey channel 101 is unloaded equipped with insertion plate door 102, by automatically controlling insertion plate door 102
It opens and closes that the flyash in grey library 1 is controlled to enter agitator 2, the first agitating shaft 201 and second that longitudinal direction is equipped in agitator 2 stirs
Axis 202 is mixed, the first agitating shaft 201 and the second agitating shaft 202 are connected with actuating unit 3 and are driven by it stirring, specifically may be used respectively
Using conventional a variety of type of drive, it is not described in detail one by one herein.2 bottom of agitator is equipped with discharge port 205, the material after wet type stirring
It is discharged through discharge port 205.
The first agitating shaft 201 and 202 upper edge short transverse of the second agitating shaft are respectively equipped with uniform intervals point in the present embodiment
The stirring blade of cloth, is circumferentially then uniformly provided with three row stirring blades respectively, and each column stirring blade includes adjacent upper and lower successively
Have a down dip paddle 204 and the paddle 203 that raises up of distribution, wherein the paddle 204 that has a down dip extends obliquely downward, raise up paddle
203 tilt upward extension；Inclined direction is opposite between adjacent two panels stirring blade, and when wet type stirs, the paddle 204 that has a down dip is to object
Material causes whereabouts trend, and the paddle 203 that raises up then can raise material upwards, the hybrid stirring of top-bottom cross is formed, to object
Material raise repeatedly and whereabouts makes in bucket material keep good circulation stirring, will not cause material set point accumulation that can not mix
Even situation effectively increases material stirring uniformity.
It should be noted that in the present embodiment 202 top position of the first agitating shaft 201 and the second agitating shaft stirring blade
It is set as tilting down the paddle 204 that has a down dip of extension, i.e., is pressed along the first agitating shaft 201 and 202 short transverse of the second agitating shaft
It is set, and the angle β between paddle 203 and vertical direction that raises up according to the sequence for the paddle 203 that raises up after the paddle 204 that first has a down dip
Not less than the angle α between paddle 204 and vertical direction that has a down dip, raise up in the present embodiment between paddle 203 and vertical direction
Angle β is 40 °, and the angle α between paddle 204 and vertical direction that has a down dip also is set as 40 °.Have a down dip paddle 204 first setting both
Can carry out effective water conservancy diversion to the flyash that is initially entered make it fall rapidly, prevent it from being raised up to form airborne dust by clamping stagnation, and can be with
Material accumulation on the stirring blade of top is prevented to be difficult to be mixed.Have a down dip paddle 204 and the angle of inclination of paddle 203 of raising up
It cooperates, can ensure fully raising up to lower part material, further strengthen the cross-mixing uniformity between material up and down.
Stirring blade in the present embodiment on the second agitating shaft 202 is located at two neighboring paddle on the first agitating shaft 201
Between piece, stirring blade during stirring on two agitating shafts will not contact with each other but keep transpostion interval distribution, and two are stirred
The mutual cooperation for mixing axis effectively increases the distribution density of stirring blade, and the intersection that material is more refined can be stirred, into
One step improves mixing uniformity.
2 outside of agitator is provided with multi-stage spray pipe along short transverse in the present embodiment, and every grade of spray tube circumferentially surrounds
On 2 side wall of agitator, uniform intervals are equipped with multiple nozzles 405 on every grade of spray tube, realize to 360 ° of all standing sprays in bucket,
Dry ash damping uniformity is improved, nozzle 405 extends into 2 inside of agitator and is in tilted layout, and the spray on adjacent two-stage spray tube
First 405 inclined direction is opposite.Specifically, 2 outside of agitator is disposed with three-level spray tube, respectively first along short transverse
Grade spray tube 401, second level spray tube 402 and third level spray tube 403；As shown in Fig. 2, between distinguishing uniformly on every grade of spray tube
Every setting there are four nozzle 405, the wherein nozzle 405 on first order spray tube 401 is obliquely installed upwards, makes its upward spraying moisture
Realize wet mixed stirring, it is 45 ° that can specifically set with vertical direction angle, and the nozzle on second level spray tube 402 is then downward
Spray moisture is tilted, specifically may be alternatively provided as with vertical direction angle is 45 °.In the present embodiment nozzle 405 be obliquely installed with
Being obliquely installed for stirring blade matches, and the tilting of moisture sprays not only spray area bigger, dry ash damping uniformity effects
More preferably, souring of the enhancing to material and stirring blade is additionally aided, the accumulation for reducing material bonds.First order spray tube
Nozzle 405 on 401 sprays moisture upwards, additionally aids reduction airborne dust, and top is avoided leakage powder phenomenon occur.It is every in the present embodiment
Flow valve 404 is equipped on grade spray tube, rationally control spray moisture flow, guarantee is mixed with the abundant damping between dry ash.
The present embodiment is compared with the traditional horizontal mixer in coal-burning power plant, using vertical double-shaft stirring structure, floor space
It is small, unload ash it is more smooth, resistance is less, and dust stratification situation is obviously improved, and is effectively changed by stirring blade and being equipped with for spray tube
The wet type mixing uniformity of flyash has been apt to it, and has reduced airborne dust generation, has improved production environment, improve productivity effect.
Embodiment 2
A kind of wet type Double shaft stirring system of the present embodiment, substantially with embodiment 1, the difference is that in the present embodiment
It is 70 ° to raise angle β between paddle 203 and vertical direction, and the angle α between paddle 204 and vertical direction that has a down dip also is set as
60°；
Secondly, the rotation direction of the first agitating shaft 201 and the second agitating shaft 202 in the present embodiment is on the contrary, when stirring not only
It, more can be to intermediate material shape into anti-by having a down dip paddle 204 and the paddle 203 that raises up realizes that the top-bottom cross of material mixes
To cross-mixing, further enhance mixing uniformity.
Again, electric motor of shaker is additionally provided on 2 outer wall of agitator in the present embodiment, bucket can be effectively removed by rapping percussion
Remaining material on wall realizes the effect of dust stratification inside periodic cleaning.
Embodiment 3
A kind of wet type Double shaft stirring system of the present embodiment, substantially with embodiment 1, the difference is that in the present embodiment
It is 45 ° to raise angle β between paddle 203 and vertical direction, and the angle α between paddle 204 and vertical direction that has a down dip also is set as
45°；
Secondly, 205 outside of discharge port is coated with flexible cloth bag 206 in the present embodiment, and dustproof cloth bag specifically can be used, so as to
This system is made to have both the function of placing dry ash in the agitator 2, and from 205 removal dry ash of discharge port when will not generate airborne dust and overflow
Phenomenon reduces loss of material.
Schematically the utility model and embodiments thereof are described above, this describes no restricted, attached drawing
Shown in be also the utility model one of embodiment, practical structure is not limited thereto.So if this field
Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design
The frame mode similar to the technical solution and embodiment, all should belong to the protection range of the utility model.
Claims (10)
1. a kind of wet type Double shaft stirring system including agitator (2), is equipped with the first agitating shaft (201) of longitudinal direction in agitator (2)
With the second agitating shaft (202), the first agitating shaft (201) and the second agitating shaft (202) are connected and with actuating unit (3) by it respectively
Driving, it is characterised in that：First agitating shaft (201) and the second agitating shaft (202) upper edge short transverse are respectively equipped with uniform intervals
The stirring blade of distribution, stirring blade include the adjacent paddle that has a down dip (204) being distributed and the paddle that raises up up and down successively
(203), the paddle (204) that has a down dip extends obliquely downward, and the paddle that raises up (203) tilts upward extension；Edge on the outside of agitator (2)
Short transverse is provided with multi-stage spray pipe, and every grade of spray tube is circumferentially surrounded on agitator (2) side wall, on every grade of spray tube
Even to be equipped at intervals with multiple nozzles (405), nozzle (405) extends into agitator (2) inside and is in tilted layout.
2. a kind of wet type Double shaft stirring system according to claim 1, it is characterised in that：First agitating shaft (201) and
Three row stirring blades are circumferentially uniformly provided on two agitating shafts (202) respectively, each column stirring blade includes adjacent upper and lower successively
The paddle that has a down dip (204) of distribution and the paddle that raises up (203).
3. a kind of wet type Double shaft stirring system according to claim 1, it is characterised in that：First agitating shaft (201) and
The stirring blade of two agitating shafts (202) top position is the paddle that has a down dip (204) for tilting down extension.
4. a kind of wet type Double shaft stirring system according to claim 1, it is characterised in that：On second agitating shaft (202)
Stirring blade is located on the first agitating shaft (201) between two neighboring stirring blade.
5. a kind of wet type Double shaft stirring system according to claim 1, it is characterised in that：Paddle (203) raise up with erecting
Nogata angle β between is not less than paddle (204) angle α between vertical direction that has a down dip.
6. a kind of wet type Double shaft stirring system according to claim 5, it is characterised in that：Paddle (203) raise up with erecting
Nogata angle β between is 40 ° -70 °.
7. a kind of wet type Double shaft stirring system according to claim 1, it is characterised in that：Along height on the outside of agitator (2)
Direction is disposed with three-level spray tube, respectively first order spray tube (401), second level spray tube (402) and third level spray
Shower pipe (403)；Nozzle (405) on every grade of spray tube is obliquely installed, and the nozzle (405) on adjacent two-stage spray tube tilts
Direction is opposite.
8. a kind of wet type Double shaft stirring system according to claim 7, it is characterised in that：On first order spray tube (401)
Nozzle (405) be obliquely installed upwards.
9. according to a kind of wet type Double shaft stirring system of claim 1-8 any one of them, it is characterised in that：On every grade of spray tube
It is equipped with flow valve (404).
10. according to a kind of wet type Double shaft stirring system of claim 1-8 any one of them, it is characterised in that：Agitator (2) pushes up
Portion is connected by unloading grey channel (101) with grey library (1), unloads grey channel (101) equipped with insertion plate door (102)；Agitator (2) bottom
Equipped with discharge port (205), flexible cloth bag (206) is coated on the outside of discharge port (205).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721660655.7U CN207591693U (en) | 2017-12-04 | 2017-12-04 | A kind of wet type Double shaft stirring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721660655.7U CN207591693U (en) | 2017-12-04 | 2017-12-04 | A kind of wet type Double shaft stirring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207591693U true CN207591693U (en) | 2018-07-10 |
Family
ID=62763125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721660655.7U Expired - Fee Related CN207591693U (en) | 2017-12-04 | 2017-12-04 | A kind of wet type Double shaft stirring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207591693U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107754663A (en) * | 2017-12-04 | 2018-03-06 | 大唐滨州发电有限公司 | A kind of wet type Double shaft stirring system |
| CN110885227A (en) * | 2019-11-29 | 2020-03-17 | 深圳宏业基岩土科技股份有限公司 | Curing agent for curing slurry of hollow pile section, preparation method and construction method |
| CN114225808A (en) * | 2021-12-14 | 2022-03-25 | 山东博研粉体技术装备有限公司 | Preparation process of red mud composite material |
-
2017
- 2017-12-04 CN CN201721660655.7U patent/CN207591693U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107754663A (en) * | 2017-12-04 | 2018-03-06 | 大唐滨州发电有限公司 | A kind of wet type Double shaft stirring system |
| CN110885227A (en) * | 2019-11-29 | 2020-03-17 | 深圳宏业基岩土科技股份有限公司 | Curing agent for curing slurry of hollow pile section, preparation method and construction method |
| CN114225808A (en) * | 2021-12-14 | 2022-03-25 | 山东博研粉体技术装备有限公司 | Preparation process of red mud composite material |
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| CF01 | Termination of patent right due to non-payment of annual fee |