CN203993562U - Blast cleaner for outer surface of steel pipe - Google Patents
Blast cleaner for outer surface of steel pipe Download PDFInfo
- Publication number
- CN203993562U CN203993562U CN201420419234.5U CN201420419234U CN203993562U CN 203993562 U CN203993562 U CN 203993562U CN 201420419234 U CN201420419234 U CN 201420419234U CN 203993562 U CN203993562 U CN 203993562U
- Authority
- CN
- China
- Prior art keywords
- separator
- steel pipe
- ball
- impeller head
- shot blasting
- 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.)
- Expired - Fee Related
Links
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The utility model has disclosed a kind of blast cleaner for outer surface of steel pipe, comprises super shot blasting cleaning chamber, impeller head, ball pulp separator, spiral conveyer and bucket elevator.Impeller head has entering pills apparatus, ball pulp separator has separator inlet and separator outlet, bucket elevator has discharging opening, discharging opening is communicated with one end of spiral conveyer, the other end of spiral conveyer is provided with the initial separator for foreign matter in Preliminary screening ball slag, separator inlet is positioned at the bottom of initial separator, and one end that separator outlet and entering pills apparatus connect ball pulp separator leads to.Above-mentioned blast cleaner for outer surface of steel pipe in use, initial separator can be screened in advance by entering the ball slag that impeller blasting indoor particle is larger, avoid bulky grain ball slag to enter the problem that causes impeller head internal blocking in impeller head, thereby improved ball blast amount and the service life of impeller head.
Description
Technical field
The utility model relates to Machining Technology field, particularly relates to a kind of for removing the blast cleaner for outer surface of steel pipe of the foreign matters such as outer wall of steel pipe surface oxide layer, corrosion, welding slag.
Background technology
Blast cleaner for outer surface of steel pipe is that one can be removed the foreign matters such as outer wall of steel pipe oxide layer, corrosion, welding slag, and makes outer wall of steel pipe obtain the equipment of certain surface roughness.Traditional blast cleaner for outer surface of steel pipe has super shot blasting cleaning chamber, impeller head, bucket elevator and dust pelletizing system.When work, it is indoor that steel pipe for clearance is transferred to impeller blasting, and ball slag charge enters impeller head and shed to steel tube surface for clearance after bucket elevator promotes.In the time that steel pipe for clearance enters in the impelling district of impeller head, its whole body is all subject to, from after the strike of the intensive ball slag of brute force of impeller head and friction, oxide skin and dirt thereof on outer wall of steel pipe being come off rapidly, and steel tube surface forms the surface with certain roughness.If it is excessive conventionally to enter ball slag charge particle in impeller head, can be trapped in for a long time impeller head inner and cannot dish out, cause the problem of impeller head internal blocking, thereby reduced the ball blast amount of impeller head unit interval.In addition, the centrifugal force of excessive ball slag charge particle in impeller head operation process is larger, the critical elements such as the interior shot wheel of the impeller head that is easy to wear and tear, orienting cover and blade, thus cause reduce the service life of impeller head.
Utility model content
Based on this, be necessary for the problems referred to above, provide a kind of and can improve the service efficiency of impeller head and the blast cleaner for outer surface of steel pipe in service life.
A kind of blast cleaner for outer surface of steel pipe, there is super shot blasting cleaning chamber, be located at described super shot blasting cleaning chamber bottom impeller head, be located at described super shot blasting cleaning chamber middle part ball pulp separator, be located at spiral conveyer and the bucket elevator at described super shot blasting cleaning chamber top; Described impeller head has entering pills apparatus, described ball pulp separator has separator inlet and separator outlet, described bucket elevator has discharging opening, described discharging opening is communicated with one end of described spiral conveyer, the other end of described spiral conveyer is provided with the initial separator for foreign matter in Preliminary screening ball slag, described separator inlet is positioned at the bottom of described initial separator, and described separator outlet is communicated with one end of described entering pills apparatus.
In preferred version, described initial separator comprises that circle is located at mouse cage screening washer on described spiral conveyer, is fixedly arranged on the rotating shaft at described mouse cage screening washer middle part and is connected and can drives the electric rotating machine of described rotating shaft forward and/or reverse rotation with described rotating shaft, and rotating shaft and described spiral conveyer are coaxial.
In preferred version, described mouse cage screening washer is provided with sieve aperture and/or screen cloth.
In preferred version, the diameter of described sieve aperture is 3mm-6mm.
In preferred version, described screen cloth is of a size of 2mm-5mm.
In preferred version, described blast cleaner for outer surface of steel pipe also comprises dust pelletizing system, the cleaning shaft that described dust pelletizing system comprises dirt pocket and is communicated with described dirt pocket, one end of described cleaning shaft is communicated with described super shot blasting cleaning chamber, between described super shot blasting cleaning chamber and described cleaning shaft, is also provided with spacer assembly.
In preferred version, described spacer assembly is at least one in screen pack and protection cascade.
In preferred version, described blast cleaner for outer surface of steel pipe also comprises the Material collecting box for harvesting of being located at described impeller head bottom, described bucket elevator has hoisting frame, is located at the hopper on described hoisting frame and is located at the switching mechanism on described hopper, described Material collecting box for harvesting is that the described hopper that is positioned at described hoisting frame bottom is communicated with, and described discharging opening is communicated with the described hopper that is positioned at described hoisting frame top.
In preferred version, described super shot blasting cleaning chamber sidewall is provided with protective plate, and described protective plate is at least one in high-chromium wear-resistant protective plate, preventing rubber plate, wear-resistant cast iron alloy protective plate and high-strength manganese steel protective plate.
In preferred version, described impeller head is 4, and is symmetrically set in respectively the direction up and down of described super shot blasting cleaning chamber, and described in each, the ball blast amount of impeller head is 1000kg/min-3000kg/min.
Above-mentioned blast cleaner for outer surface of steel pipe, is provided with the initial separator with the elementary screening function of ball slag in the end of spiral conveyer.In use procedure, ball slag charge is promoted to one end of spiral conveyer through bucket elevator, spiral conveyer transfers to ball slag charge in initial separator, and satisfactory ball slag is carried out Preliminary screening by initial separator, and makes to enter in ball pulp separator through the ball slag of Preliminary screening.Initial separator can be screened in advance by entering the ball slag that impeller blasting indoor particle is larger, has avoided bulky grain ball slag to enter the problem that causes impeller head internal blocking in impeller head, thereby improves ball blast amount and the service life of impeller head.
Brief description of the drawings
Fig. 1 is the front view of blast cleaner for outer surface of steel pipe;
Fig. 2 is the right view of blast cleaner for outer surface of steel pipe.
Wherein, each components and parts reference numeral is listed as follows:
100, blast cleaner for outer surface of steel pipe 110, super shot blasting cleaning chamber
111, protective plate 120, impeller head
121, entering pills apparatus 130, ball pulp separator
131, separator inlet 132, separator outlet
133, one-level filter plate 134, secondary filter plate
135, secondary filter plate 140, spiral conveyer
150, bucket elevator 151, discharging opening
152, hoisting frame 153, hopper
160, initial separator 161, mouse cage screening washer
1611, sieve aperture 162, rotating shaft
163, reclaim chamber 170, dust pelletizing system
171, dirt pocket 172, cleaning shaft
173, spacer assembly 180, Material collecting box for harvesting
200, steel pipe
Detailed description of the invention
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.A lot of details are set forth in the following description so that fully understand the present invention.But the present invention can implement to be much different from alternate manner described here, and those skilled in the art can do similar improvement without prejudice to intension of the present invention in the situation that, and therefore the present invention is not subject to the restriction of following public specific embodiment.
Unless otherwise defined, all technology that use are herein identical with the implication that belongs to the common understanding of those skilled in the art of the present invention with scientific terminology.The term using in description of the present invention herein, just in order to describe the object of specific embodiment, is not intended to be restriction the present invention.Term as used herein "and/or" comprise one or more relevant Listed Items arbitrarily with all combinations.
It should be noted that, described in present embodiment " on " side or " top " portion, referring to the top described in accompanying drawing 1, the D score side described in present embodiment or " end " portion, refer to the below described in accompanying drawing 1.
Please refer to the drawing 1 and Fig. 2, be the structural representation sketch of blast cleaner for outer surface of steel pipe, and this blast cleaner for outer surface of steel pipe 100 has super shot blasting cleaning chamber 110, impeller head 120, ball pulp separator 130, spiral conveyer 140 and bucket elevator 150.Wherein, impeller head 120 is located at the bottom of super shot blasting cleaning chamber 110, and ball pulp separator 130 is located at the middle part of super shot blasting cleaning chamber 110, and spiral conveyer 140 is located at the top of super shot blasting cleaning chamber 110 and is communicated with one end of bucket elevator 150.Bucket elevator 150 has discharging opening 151.Discharging opening 151 is communicated with one end of spiral conveyer 140, and the other end of spiral conveyer 140 is provided with the initial separator 160 for foreign matter in Preliminary screening ball slag.
Initial separator 160 comprises that circle is located at mouse cage screening washer 161 on spiral conveyer 140, the rotating shaft 162 coaxial with spiral conveyer 140 and is connected and can drives the electric rotating machine (not shown) of rotating shaft 162 forwards and/or reverse rotation with rotating shaft 162, and rotating shaft 162 is fixedly arranged on mouse cage screening washer middle part also can make mouse cage screening washer 161 rotate around above-mentioned rotating shaft 162.Mouse cage screening washer 161 is provided with sieve aperture and/or screen cloth.In present embodiment, mouse cage screening washer 161 is provided with equally distributed sieve aperture 1611, and wherein, the diameter of sieve aperture 1611 is 3mm-6mm.The sieve aperture 1611 with above-mentioned size can be blocked in mouse cage screening washer 161 inside by oarse-grained ball slag better.It is pointed out that in other embodiments, be also provided with screen cloth on mouse cage screening washer, screen cloth can be regular grid, can be also irregular grid, and in preferred embodiment, above-mentioned screen cloth is of a size of 2mm-5mm.
Ball pulp separator 130 is located between initial separator 160 and impeller head 120.Concrete, ball pulp separator 130 has separator inlet 131 and separator outlet 132, and impeller head 120 has entering pills apparatus 121, and separator outlet 132 is communicated with entering pills apparatus 121, and separator inlet 131 is positioned at the bottom of initial separator 160.
In use procedure, ball slag charge is promoted to one end of spiral conveyer 140 through bucket elevator 150, spiral conveyer 140 transfers to ball slag charge in initial separator 160, initial separator 160 is carried out Preliminary screening by mouse cage screening washer 161 by satisfactory ball slag, and makes to enter in ball pulp separator 130 through the ball slag of Preliminary screening.Now, some oarse-grained ball slags or foreign matter flow into from one end of mouse cage screening washer 161 that to reclaim chamber 163 interior etc. pending.In preferred version, the other end of mouse cage screening washer is also provided with to the blower system that reclaims chamber 163 direction air-supplies, for the oarse-grained ball slag or the foreign matter that are positioned at mouse cage screening washer 161 are blown into recovery chamber 163.Above-mentioned initial separator 160 can be screened in advance by entering the ball slag that super shot blasting cleaning chamber 110 endoparticles are larger, avoid bulky grain ball slag to enter the problem that causes impeller head 120 internal blockings in impeller head 120, and improved ball blast amount and the service life of impeller head 120.
In addition, blast cleaner for outer surface of steel pipe 100 also comprises dust pelletizing system 170 for removing super shot blasting cleaning chamber 110 interior dusts, is located at the Material collecting box for harvesting 180 of impeller head bottom 120 and is arranged in super shot blasting cleaning chamber 100 for carrying and transmit the transmission roller channel (not shown) of steel pipe 200.
The cleaning shaft 172 that dust pelletizing system 170 comprises dirt pocket 171 and is communicated with dirt pocket 171, one end of cleaning shaft 172 is communicated with the top of super shot blasting cleaning chamber 110, between super shot blasting cleaning chamber 110 and cleaning shaft 172, is also provided with spacer assembly 173.Spacer assembly 173 fixedly covers the screen pack on super shot blasting cleaning chamber 110 for one deck, and screen pack is provided with mesh and/or grid.It is pointed out that spacer assembly is not limited to filter screen structure, in other embodiments, spacer assembly can also be protection cascade.Spacer assembly 173 can be blocked in the ball slag rubbing the spark in super shot blasting cleaning chamber 110 or temperature is high cleaning shaft 172 outsides, thereby has fundamentally stopped cloth bag and the filter core probability on fire of dirt pocket 171 inside, has reduced production loss.
Material collecting box for harvesting 180 is for collecting the ball slag that is scattered in super shot blasting cleaning chamber 110 bottoms, thereby can further recycle ball slag.Bucket elevator 150 has hoisting frame 152, is located at the hopper 153 on hoisting frame 152 and is located at the switching mechanism (not shown) for Turnover bunker 153 on hopper 153.Wherein, Material collecting box for harvesting 180 is communicated with the hopper 153 that is positioned at hoisting frame 152 bottoms, and the ball slag that is positioned at Material collecting box for harvesting 180 is transported on each hopper 153 by auger (not shown).And discharging opening 151 is communicated with the hopper 153 that is positioned at hoisting frame 152 tops.
Above-mentioned blast cleaner for outer surface of steel pipe 100 in use, steel pipe 200 is transmitted roller transmission to super shot blasting cleaning chamber 110, meanwhile, ball slag charge is placed on hopper 153, and be promoted to after discharging opening 151 through the hoisting frame 152 of bucket elevator 150, switching mechanism Turnover bunker 153, and ball slag charge is poured onto on spiral conveyer 140, spiral conveyer 140 transfers to ball slag charge the first portion screening of carrying out ball slag in initial separator 160, and the larger foreign matter of particle can be separated relatively.Ball slag charge through the screening of first portion enters in ball pulp separator 130, in ball pulp separator, be provided with one-level filter plate 133, secondary filter plate 134 and three grades of filter plates 135, ball slag charge is shunted and is formed stream curtain by above-mentioned filter plate successively, wherein, one-level filter plate 133, angle between secondary filter plate 134 and three grades of filter plate 135 relative level faces can regulate, ball slag charge is in the process declining, owing to being subject to the thrust of horizontal gas flow to particle, and one-level filter plate 133, the impact of the water conservancy diversion effect of secondary filter plate 134 and three grades of filter plates 135, can form the curvilinear motion track of deflection, because of the difference of proportion and the particle diameter of ball slag charge, its deflection is different, thereby ball slag is separated and final qualified ball slag is flow in the entering pills apparatus 121 of impeller head 120 from separator outlet 132.Wherein, impeller head is 4, and is symmetrically set in respectively the direction up and down of super shot blasting cleaning chamber, and the ball blast amount of each impeller head is 1000kg/min-3000kg/min.The ball slag that enters impeller head 120 is shed to steel pipe 200 surfaces, thereby steel pipe 200 outer walls are carried out to impeller blasting.Super shot blasting cleaning chamber 110 sidewalls are provided with protective plate 111, thereby the sidewall that prevents screen pack super shot blasting cleaning chamber 110 produces deformation under the quick strike of intensive ball slag and high heat effect.In preferred version, protective plate is at least one in high-chromium wear-resistant protective plate, preventing rubber plate, wear-resistant cast iron alloy protective plate and high-strength manganese steel protective plate.Dust in super shot blasting cleaning chamber 110 raises up and by being positioned at after the spacer assembly 173 isolation screenings at its top, enters 171 li of dirt pockets carry out dust removal process by cleaning shaft 172; Meanwhile, the ball slag charge in super shot blasting cleaning chamber 110 enters Material collecting box for harvesting 180 under Action of Gravity Field, be transported to by auger on each hopper 153 of hoisting frame 152 bottoms, and the link that recycles that enters next step.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. a blast cleaner for outer surface of steel pipe, it is characterized in that, there is super shot blasting cleaning chamber, be located at described super shot blasting cleaning chamber bottom impeller head, be located at described super shot blasting cleaning chamber middle part ball pulp separator, be located at spiral conveyer and the bucket elevator at described super shot blasting cleaning chamber top; Described impeller head has entering pills apparatus, described ball pulp separator has separator inlet and separator outlet, described bucket elevator has discharging opening, described discharging opening is communicated with one end of described spiral conveyer, the other end of described spiral conveyer is provided with the initial separator for foreign matter in Preliminary screening ball slag, described separator inlet is positioned at the bottom of described initial separator, and described separator outlet is communicated with one end of described entering pills apparatus.
2. blast cleaner for outer surface of steel pipe according to claim 1, it is characterized in that, described initial separator comprises that circle is located at mouse cage screening washer on described spiral conveyer, is fixedly arranged on the rotating shaft at described mouse cage screening washer middle part and is connected and can drives the electric rotating machine of described rotating shaft forward and/or reverse rotation with described rotating shaft, and rotating shaft and described spiral conveyer are coaxial.
3. blast cleaner for outer surface of steel pipe according to claim 2, is characterized in that, described mouse cage screening washer is provided with sieve aperture and/or screen cloth.
4. blast cleaner for outer surface of steel pipe according to claim 3, is characterized in that, the diameter of described sieve aperture is 3mm-6mm.
5. blast cleaner for outer surface of steel pipe according to claim 3, is characterized in that, described screen cloth is of a size of 2mm-5mm.
6. blast cleaner for outer surface of steel pipe according to claim 1, it is characterized in that, also comprise dust pelletizing system, the cleaning shaft that described dust pelletizing system comprises dirt pocket and is communicated with described dirt pocket, one end of described cleaning shaft is communicated with described super shot blasting cleaning chamber, between described super shot blasting cleaning chamber and described cleaning shaft, is also provided with spacer assembly.
7. blast cleaner for outer surface of steel pipe according to claim 6, is characterized in that, described spacer assembly is at least one in screen pack and protection cascade.
8. blast cleaner for outer surface of steel pipe according to claim 1, it is characterized in that, also comprise the Material collecting box for harvesting of being located at described impeller head bottom, described bucket elevator has hoisting frame, is located at the hopper on described hoisting frame and is located at the switching mechanism on described hopper, described Material collecting box for harvesting is that the described hopper that is positioned at described hoisting frame bottom is communicated with, and described discharging opening is communicated with the described hopper that is positioned at described hoisting frame top.
9. blast cleaner for outer surface of steel pipe according to claim 1, it is characterized in that, described super shot blasting cleaning chamber sidewall is provided with protective plate, and described protective plate is at least one in high-chromium wear-resistant protective plate, preventing rubber plate, wear-resistant cast iron alloy protective plate and high-strength manganese steel protective plate.
10. blast cleaner for outer surface of steel pipe according to claim 1, is characterized in that, described impeller head is 4, and is symmetrically set in respectively the direction up and down of described super shot blasting cleaning chamber, and described in each, the ball blast amount of impeller head is 1000kg/min-3000kg/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420419234.5U CN203993562U (en) | 2014-07-25 | 2014-07-25 | Blast cleaner for outer surface of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420419234.5U CN203993562U (en) | 2014-07-25 | 2014-07-25 | Blast cleaner for outer surface of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203993562U true CN203993562U (en) | 2014-12-10 |
Family
ID=52033625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420419234.5U Expired - Fee Related CN203993562U (en) | 2014-07-25 | 2014-07-25 | Blast cleaner for outer surface of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203993562U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552020A (en) * | 2015-02-02 | 2015-04-29 | 湖南湘能重工有限公司 | Shot blasting machine for outer wall of wind tower |
| CN104589218A (en) * | 2014-12-19 | 2015-05-06 | 青岛天能重工股份有限公司 | Shot blasting machine for inner wall of wind tower |
| CN107471121A (en) * | 2017-08-23 | 2017-12-15 | 哈尔滨华青铸造机械有限公司 | Mouse cage shot-blast cleaning machine |
| CN107571157A (en) * | 2017-10-20 | 2018-01-12 | 盐城市丰特铸造机械有限公司 | A kind of ball blast tandem shot-blast cleaning machine |
| CN109277952A (en) * | 2018-11-21 | 2019-01-29 | 南通华亮健身器材有限公司 | A kind of medical bed tube surface shot-treating apparatus |
| CN110550390A (en) * | 2019-09-27 | 2019-12-10 | 孔令州 | Ore transportation is with conveyer belt that can commutate |
-
2014
- 2014-07-25 CN CN201420419234.5U patent/CN203993562U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589218A (en) * | 2014-12-19 | 2015-05-06 | 青岛天能重工股份有限公司 | Shot blasting machine for inner wall of wind tower |
| CN104552020A (en) * | 2015-02-02 | 2015-04-29 | 湖南湘能重工有限公司 | Shot blasting machine for outer wall of wind tower |
| CN107471121A (en) * | 2017-08-23 | 2017-12-15 | 哈尔滨华青铸造机械有限公司 | Mouse cage shot-blast cleaning machine |
| CN107471121B (en) * | 2017-08-23 | 2019-10-11 | 哈尔滨华青铸造机械有限公司 | Mouse cage shot-blast cleaning machine |
| CN107571157A (en) * | 2017-10-20 | 2018-01-12 | 盐城市丰特铸造机械有限公司 | A kind of ball blast tandem shot-blast cleaning machine |
| CN109277952A (en) * | 2018-11-21 | 2019-01-29 | 南通华亮健身器材有限公司 | A kind of medical bed tube surface shot-treating apparatus |
| CN110550390A (en) * | 2019-09-27 | 2019-12-10 | 孔令州 | Ore transportation is with conveyer belt that can commutate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203993562U (en) | Blast cleaner for outer surface of steel pipe | |
| CN101362112B (en) | Dry-type sand making method and dry-type sand making machine thereof | |
| CN204954641U (en) | Automatic on crawler -type abrator of unloading | |
| CN103978437A (en) | Shot blasting machine for processing moving steel wire | |
| CN208961808U (en) | The magnetic separation mechanism of shot material in a kind of shot-blasting machine | |
| CN103978439A (en) | Meshed belt type shot-blast cleaning machine | |
| CN203993576U (en) | Blast cleaner for outer surface of steel pipe | |
| CN205057826U (en) | Shot shot blasting equipment is joined in marriage to level | |
| CN112658999B (en) | Multi-angle shot blasting device for driving type pavement shot blasting machine | |
| CN110421491A (en) | A kind of shot-blasting machine with dust-extraction unit | |
| CN106955800B (en) | Novel dry-type purification method and purification structure | |
| CN205888912U (en) | Track through type abrator | |
| CN205950513U (en) | Continuous through type shot -blasting machine of clutch disk | |
| CN101862810B (en) | Cast used sand and slag recycling equipment | |
| CN104139343A (en) | Pneumatic shot blast machine for inner and outer walls of steel pipes | |
| CN208801224U (en) | A kind of Novel shot blasting machine | |
| CN209093499U (en) | A kind of mill component of vertical roll grinder | |
| CN201684884U (en) | Foundry sand and furnace slag recovering treatment equipment | |
| CN104369116B (en) | A kind of shot-blasting machine material ball circulatory system | |
| CN108214321A (en) | A kind of shot-blasting machine | |
| CN205218857U (en) | Automatic steel sand circulation and purifier of shot -blasting machine | |
| CN212578395U (en) | Two-box shot-sand separator of shot blasting machine | |
| CN211053474U (en) | Shot blasting machine | |
| CN109834043B (en) | Waste sand recycling assembly line | |
| CN103939925A (en) | Waste heat boiler dust removal device of ferroalloy submerged arc furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160725 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |