CN107828934A - A kind of Dreg Scraping Device of Oxygen Lance - Google Patents
A kind of Dreg Scraping Device of Oxygen Lance Download PDFInfo
- Publication number
- CN107828934A CN107828934A CN201710896506.9A CN201710896506A CN107828934A CN 107828934 A CN107828934 A CN 107828934A CN 201710896506 A CN201710896506 A CN 201710896506A CN 107828934 A CN107828934 A CN 107828934A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- driving shaft
- driven shaft
- scraping device
- oxygen lance
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4693—Skull removal; Cleaning of the converter mouth
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a kind of Dreg Scraping Device of Oxygen Lance, including fixed frame, driving shaft and driven shaft are symmetrically arranged with fixed frame, the both ends of driving shaft are respectively arranged with connecting rod one and connecting rod two around driving shaft axis rotation, one end of driven shaft is provided with the connecting rod three around driven shaft axis rotation, driving shaft is connected with drive mechanism by connecting rod one, connecting rod two is connected by link assembly with connecting rod three, one group of doctor assemblies is respectively arranged with driving shaft and driven shaft, two groups of doctor assemblies are symmetrical.The Dreg Scraping Device of Oxygen Lance realizes the synchronous opening/closing of doctor assemblies using four-bar linkage, connecting rod operates steadily, slag scraper rigidity strengthens, optimize the structure type of slag scraper, the service life of slag scraper is improved, while by setting multiple scrapers, makes the slag of oxygen rifle outer wall there are multiple stress points, more contribute to broken slag, improve and scrape slag effect.
Description
Technical field
The invention belongs to the STEELMAKING PRODUCTION equipment technical field of metallurgy industry, and in particular to a kind of Dreg Scraping Device of Oxygen Lance.
Background technology
Oxygen rifle is one of key equipment of pneumatic steelmaking, and bath lancing when it is responsible for blowing into converter and blowing are tied
Nitrogen flushing carries out slag splashing to protect the task of furnace lining in Shu Houxiang converters.Oxygen rifle can not during blowing and slag splashing
Slag can be adhered on oxygen rifle outer layer pipe with avoiding, if not in time struck off slag, with the increase for smelting number, oxygen rifle
The slag adhered on outer layer pipe is more and more thick, when serious oxygen rifle can be made not lift normally, if imperative operation will burn oxygen
Rifle lifting motor breaks steel wire rope, at this moment the oxygen rifle of dry slag can only be cut off with flame cutting machine, remove what is cut off
Oxygen rifle, more renew oxygen rifle, therefore cause the service life of oxygen rifle to be greatly lowered, not only add the cost depletions of oxygen rifle, and
Frequent burning torch, the continuity that rifle destroys STEELMAKING PRODUCTION is changed, add the labor intensity of worker.
At present, oxygen rifle slag manner of cleaning up has two kinds of manual cleaning and automatic scraping slag:1) cleared up using manual cleaning mode
During the slag adhered in oxygen rifle, not only working environment is severe, and labor intensity is big, and can only could be carried out when stopping and producing,
Time-consuming, efficiency is low；2) existing automatic scraping slag equipment, it is substantially consistent that it, which scrapes slag principle, is all when converter is blown
While refining or slag splashing finish oxygen rifle proposition oxygen rifle mouth, two machineries in air control unit driving left and right of Dreg Scraping Device of Oxygen Lance
Arm, the U-shaped or semi-circular slag scraper cutter head of mechanical arm is set to close up the oxygen rifle for holding around adhesion slag, when oxygen rifle is lifted, slag scraper knife
Head starts the slag that scraping is adhered in oxygen rifle.But the complexity of oxygen lance operation necessarily causes slag in oxygen rifle mixed viscous, sometimes
One layer of slag of even one layer of steel, such a situation is run into, existing Dreg Scraping Device of Oxygen Lance is difficult to the slag for wiping oxygen rifle adhesion off, if nothing
Method effectively removes slag, is easy to cause security incident, therefore have potential safety hazard.
The content of the invention
The purpose of the present invention is to overcome existing oxygen rifle to scrape slag equipment to scrape that slag effect is poor, service life is short, potential safety hazard be present
The problem of.
Therefore, the embodiments of the invention provide a kind of Dreg Scraping Device of Oxygen Lance, including fixed frame, it is symmetrical on the fixed frame
Driving shaft and driven shaft are provided with, the both ends of the driving shaft are respectively arranged with connecting rod one and company around driving shaft axis rotation
Extension bar two, one end of the driven shaft are provided with the connecting rod three around driven shaft axis rotation, and the driving shaft passes through connecting rod
One is connected with drive mechanism, and the connecting rod two is connected by link assembly with connecting rod three, on the driving shaft and driven shaft
One group of doctor assemblies is respectively arranged with, two groups of doctor assemblies are symmetrical.
Further, four bearing blocks are provided with the fixed frame, the both ends of the driving shaft and driven shaft are logical
Bearing is crossed to be connected on bearing block.
Further, the driving shaft is double-cantilever structure, the connecting rod one and connecting rod two by key respectively with master
End shaft cantilever part connects.
Further, the driven shaft is single-cantilever structure, the connecting rod three by key connection driven shaft cantilever
Part.
Further, the drive mechanism includes air cylinder base, cylinder and jaw, and the cylinder is consolidated by its afterbody ear mount
It is scheduled on air cylinder base, the movable end of cylinder is connected with jaw one end, and the jaw other end is be hinged with the connecting rod one.
Further, the link assembly includes two fork of connecting rods, pull bar and nut, two described fork of connecting rod one end
The both ends with pull bar are connected through a screw thread respectively, and by nut check, the other ends of two fork of connecting rods respectively with institute
State connecting rod two and connecting rod three is be hinged.
Further, in the connecting rod two, connecting rod three and the axis of link assembly three are generally aligned in the same plane.
Further, the doctor assemblies include scraper plate, knife rest and scraper, and the knife rest has multiple, and multiple knife rests are fixed
The upper surface of scraper plate is arranged on, the scraper is arranged on knife rest, and the point of a knife of driving shaft and driven shaft upper blade is located at and oxygen
On the isodiametric concentric circles of rifle.
Further, the opposite side of two scraper plates is the circular arc being adapted with oxygen rifle outer wall on the driving shaft and driven shaft
Shape structure, the scraper on the driving shaft and driven shaft are symmetrical.
Further, frame is welded and fixed on the driving shaft and driven shaft, the doctor assemblies are bolted part
It is detachably connected on fixed mount.
Compared with prior art, beneficial effects of the present invention：
(1) this Dreg Scraping Device of Oxygen Lance provided by the invention realizes the synchronous opening/closing of doctor assemblies, connecting rod using four-bar linkage
Operate steadily, slag scraper rigidity strengthens, and optimizes the structure type of slag scraper, improves the service life of slag scraper.
(2) this Dreg Scraping Device of Oxygen Lance provided by the invention sets multiple scrapers, makes the slag of oxygen rifle outer wall have multiple stress
Point, more contribute to broken slag, scrape slag effect and be improved, it is effective to reduce the pressure for scraping slag, further protect lifting
The steel wire rope of oxygen rifle and the service life for extending the relevant devices such as oxygen rifle.
The present invention is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the front view of Dreg Scraping Device of Oxygen Lance of the present invention；
Fig. 2 is the top view of Dreg Scraping Device of Oxygen Lance of the present invention；
Fig. 3 is the left view of Dreg Scraping Device of Oxygen Lance of the present invention；
Fig. 4 is the rearview of Dreg Scraping Device of Oxygen Lance of the present invention.
Description of reference numerals：1st, fixed frame；2nd, connecting rod two；3rd, driving shaft；4th, doctor assemblies；5th, pull bar；6th, nut；
7th, fork of connecting rod；8th, connecting rod three；9th, driven shaft；10th, drive mechanism；11st, bolt connection piece；12nd, fixed mount；13rd, scraper plate；
14th, connecting rod one；15th, key；16th, jaw；17th, cylinder；18th, air cylinder base；19th, bearing block；20th, bearing；21st, knife rest；22nd, scrape
Knife.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position relationship of the instruction such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are based on shown in the drawings
Orientation or position relationship, be for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention；
In description of the invention, unless otherwise indicated, " multiple ", " some " are meant that two or more.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of Dreg Scraping Device of Oxygen Lance, including fixed frame 1, institute are present embodiments provided
State specular on fixed frame 1 and be provided with driving shaft 3 and driven shaft 9, the both ends of the driving shaft 3 are respectively arranged with around actively
The connecting rod 1 and connecting rod 22 of the axis rotation of axle 3, one end of the driven shaft 9 are provided with around the axis rotation of driven shaft 9
Connecting rod 38, the driving shaft 3 are connected with drive mechanism 10 by connecting rod 1, and the connecting rod 22 passes through link assembly
It is connected with connecting rod 38, one group of doctor assemblies 4 is respectively arranged with the driving shaft 3 and driven shaft 9, two groups of doctor assemblies 4 is right
Claim distribution.When carrying out scraping slag to oxygen rifle using the Dreg Scraping Device of Oxygen Lance of the present embodiment, drive mechanism 10 is promoted by connecting rod 1
Driving shaft 3 rotates, while the connecting rod 22 on the other end of driving shaft 3 drives the connecting rod 38 on driven shaft 9 by link assembly
Motion, so as to drive driven shaft 9 to rotate so that two groups of doctor assemblies 4 on driving shaft 3 and driven shaft 9 do move toward one another, by oxygen
Rifle is embraced, and when being lifted up oxygen rifle, slag strikes off under the effect of doctor assemblies 4 to come off, and completes oxygen rifle and scrapes slag；Work as Dreg Scraping Device of Oxygen Lance
After slag is scraped in completion, drive mechanism 10 bounces back, and promotes the opposite direction of driving shaft 3 to rotate by connecting rod 1, while the other end of driving shaft 3
On connecting rod 22 by link assembly drive driven shaft 9 on the opposite direction of connecting rod 38 move, so as to drive the negative side of driven shaft 9
To rotation so that two groups of doctor assemblies 4 on driving shaft 3 and driven shaft 9 do opposite motion.Connecting rod 22, company in the present embodiment
Extension bar 38 and the be hinged double rocker mechanism formed in four-bar linkage of link assembly, the synchronous opening/closing of doctor assemblies 4 is realized,
Double rocker mechanism operates steadily, the enhancing of slag scraper rigidity, improves the service life of slag scraper.
The embodiment of refinement, four bearing blocks 19, the driving shaft 3 and driven shaft 9 are provided with the fixed frame 1
Both ends be connected to by bearing 20 on bearing block 19, realize the rotation around axis center.The driving shaft 3 is double cantilever knots
Structure, the connecting rod 1 and connecting rod 22 are connected with the both ends cantilever part of driving shaft 3 respectively by key 15, the He of connecting rod 1
Connecting rod 22 is in identical initial makeup location；And the driven shaft 9 is single-cantilever structure, the connecting rod 38 passes through key 15
It is connected to the cantilever part of driven shaft 9, it is preferred that the connecting rod 22, connecting rod 38 and the axis position of link assembly three
In forming four-bar linkage in same plane, drive its motion more laborsaving, operate steadily, reduce energy consumption.
A kind of embodiment, the drive mechanism 10 include air cylinder base 18, cylinder 17 and jaw 16, and the cylinder 17 is logical
Its afterbody ear mount is crossed to be fixed on air cylinder base 18, the movable end of cylinder 17 is connected with the one end of jaw 16, the other end of jaw 16 with
The connecting rod 1 is be hinged；When carrying out scraping slag to oxygen rifle, cylinder 17 controls cylinder piston rod to stretch out, the fork of piston rod movable end
First 16 drive connecting rod 1 to move, so as to promote driving shaft 3 to rotate；And after completing to scrape slag, cylinder 17 controls piston rod to move back
Return, the jaw 16 of piston rod movable end drives the counter motion of connecting rod 1, so as to promote driving shaft 3 to rotate backward.The company
Bar assembly includes two fork of connecting rods 7, pull bar 5 and nut 6, and both ends of two described one end of fork of connecting rod 7 respectively with pull bar 5 lead to
Cross threaded connection, and locked by nut 6, the other ends of two fork of connecting rods 7 respectively with the connecting rod 22 and connecting rod three
8 is be hinged, and the length of connection component can be adjusted by screw thread pair.
The doctor assemblies 4 include scraper plate 13, knife rest 21 and scraper 22, and the knife rest 21 has multiple, and multiple knife rests 21 are solid
Surely the upper surface of scraper plate 13 is arranged on, as shown in Fig. 2 installing three knife rests 21, each knife rest in this implementation on each scraper plate 13
Be respectively mounted scraper 22 on 21, and the point of a knife of driving shaft 3 and the upper blade 22 of driven shaft 9 be located at on the isodiametric concentric circles of oxygen rifle,
Ensure that scraper 22 is bonded with oxygen rifle outer wall.The opposite side of two scraper plates 13 is and oxygen rifle outer wall on the driving shaft 3 and driven shaft 9
The arc-shaped structure being adapted, the scraper 22 on the driving shaft 3 and driven shaft 9 is symmetrical, scraper plate 13 and oxygen rifle outer wall table
Face is corresponding, so that two groups of scraper components 4, which can close up, holds around oxygen rifle, slag effect is scraped in raising.Preferably, the He of driving shaft 3
Frame 12 is welded and fixed on driven shaft 9, the doctor assemblies 4 are bolted part 11 and are detachably connected on fixed mount 12,
The quick-replaceable of doctor assemblies 4 can be achieved.Further, will can be detachably connected between scraper 22 and knife rest 21, specifically
, it is attached between scraper 22 and knife rest 21 by connecting bolt, stop production inspection in the gap that Dreg Scraping Device of Oxygen Lance disables or plan
When repairing, it is not necessary to dismantle doctor assemblies 4, need to only loosen connecting bolt and carry out forming adjustment, or the connection of the whole scraper 22 of dismounting
Scraper 22 after bolt wears one end reverses end for end commutation and is continuing with the non-wearing part of the other end of scraper 22, improves doctor assemblies 4
Service life, it is cost-effective, or by whole scraper dismounting and change, do not influence steelmaking process, it is easy to maintenance.
In summary, this Dreg Scraping Device of Oxygen Lance provided by the invention realizes the synchronization of doctor assemblies using four-bar linkage
Open and close, connecting rod operates steadily, the enhancing of slag scraper rigidity, optimizes the structure type of slag scraper, and improve slag scraper uses the longevity
Life, while by setting multiple scrapers, make the slag of oxygen rifle outer wall have multiple stress points, more contribute to broken slag, improve
Scrape slag effect.
It is exemplified as above be only to the present invention for example, do not form the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (10)
- A kind of 1. Dreg Scraping Device of Oxygen Lance, it is characterised in that：Including fixed frame (1), master is symmetrically arranged with the fixed frame (1) Moving axis (3) and driven shaft (9), the both ends of the driving shaft (3) are respectively arranged with the connecting rod one around driving shaft (3) axis rotation (14) and connecting rod two (2), one end of the driven shaft (9) are provided with the connecting rod three (8) around driven shaft (9) axis rotation, The driving shaft (3) is connected with drive mechanism (10) by connecting rod one (14), the connecting rod two (2) by link assembly with Connecting rod three (8) is connected, and one group of doctor assemblies (4), two groups of scrapers are respectively arranged with the driving shaft (3) and driven shaft (9) Component (4) is symmetrical.
- 2. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：Four bearings are provided with the fixed frame (1) The both ends of seat (19), the driving shaft (3) and driven shaft (9) are connected on bearing block (19) by bearing (20).
- 3. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The driving shaft (3) is double-cantilever structure, the company Extension bar one (14) and connecting rod two (2) are connected with driving shaft (3) both ends cantilever part respectively by key (15).
- 4. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The driven shaft (9) is single-cantilever structure, the company Extension bar three (8) is connected to the cantilever part of driven shaft (9) by key (15).
- 5. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The drive mechanism (10) includes air cylinder base (18), cylinder (17) and jaw (16), the cylinder (17) are fixed on air cylinder base (18) by its afterbody ear mount, cylinder (17) movable end is connected with jaw (16) one end, and jaw (16) other end is be hinged with the connecting rod one (14).
- 6. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The link assembly include two fork of connecting rods (7), Pull bar (5) and nut (6), both ends of two described fork of connecting rod (7) one end respectively with pull bar (5) are connected through a screw thread, and logical Nut (6) locking is crossed, the other end of two fork of connecting rods (7) is be hinged with the connecting rod two (2) and connecting rod three (8) respectively.
- 7. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The connecting rod two (2), connecting rod three (8) and company In the axis of bar assembly three is generally aligned in the same plane.
- 8. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The doctor assemblies (4) include scraper plate (13), knife rest (21) and scraper (22), the knife rest (21) has multiple, and multiple knife rests (21) are fixedly installed on the upper surface of scraper plate (13), described Scraper (22) is arranged on knife rest (21), and the point of a knife of driving shaft (3) and driven shaft (9) upper blade (22) is positioned at straight with oxygen rifle etc. On the concentric circles in footpath.
- 9. Dreg Scraping Device of Oxygen Lance as claimed in claim 8, it is characterised in that：The driving shaft (3) and upper two of driven shaft (9) are scraped The opposite side of plate (13) is the arc-shaped structure that is adapted with oxygen rifle outer wall, the scraper on the driving shaft (3) and driven shaft (9) (22) it is symmetrical.
- 10. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：Welded on the driving shaft (3) and driven shaft (9) Fixed mount (12) is connect, the doctor assemblies (4) are bolted part (11) and are detachably connected on fixed mount (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896506.9A CN107828934A (en) | 2017-09-28 | 2017-09-28 | A kind of Dreg Scraping Device of Oxygen Lance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896506.9A CN107828934A (en) | 2017-09-28 | 2017-09-28 | A kind of Dreg Scraping Device of Oxygen Lance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107828934A true CN107828934A (en) | 2018-03-23 |
Family
ID=61644083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710896506.9A Pending CN107828934A (en) | 2017-09-28 | 2017-09-28 | A kind of Dreg Scraping Device of Oxygen Lance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107828934A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371196A (en) * | 2018-12-24 | 2019-02-22 | 中冶南方工程技术有限公司 | A kind of compact slag scraper |
| CN109402324A (en) * | 2018-11-30 | 2019-03-01 | 南安市莱康机械科技有限公司 | A kind of metallurgical furnace oxygen lance Slag Scraping Device for scratching and hitting using rotation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202081125U (en) * | 2011-05-13 | 2011-12-21 | 沈树光 | Slag scraping device of converter oxygen lance |
| CN202099315U (en) * | 2011-06-01 | 2012-01-04 | 中冶东方工程技术有限公司 | Slag scraping device for oxygen lance |
| CN203754752U (en) * | 2014-02-25 | 2014-08-06 | 中冶华天工程技术有限公司 | Oxygen lance slag scraper capable of realizing secondary slag scraping |
-
2017
- 2017-09-28 CN CN201710896506.9A patent/CN107828934A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202081125U (en) * | 2011-05-13 | 2011-12-21 | 沈树光 | Slag scraping device of converter oxygen lance |
| CN202099315U (en) * | 2011-06-01 | 2012-01-04 | 中冶东方工程技术有限公司 | Slag scraping device for oxygen lance |
| CN203754752U (en) * | 2014-02-25 | 2014-08-06 | 中冶华天工程技术有限公司 | Oxygen lance slag scraper capable of realizing secondary slag scraping |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109402324A (en) * | 2018-11-30 | 2019-03-01 | 南安市莱康机械科技有限公司 | A kind of metallurgical furnace oxygen lance Slag Scraping Device for scratching and hitting using rotation |
| CN109371196A (en) * | 2018-12-24 | 2019-02-22 | 中冶南方工程技术有限公司 | A kind of compact slag scraper |
| CN109371196B (en) * | 2018-12-24 | 2023-11-21 | 中冶南方工程技术有限公司 | Compact slag scraper |
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Application publication date: 20180323 |