CN205603228U - Carborundum purification clean system - Google Patents
Carborundum purification clean system Download PDFInfo
- Publication number
- CN205603228U CN205603228U CN201620213312.5U CN201620213312U CN205603228U CN 205603228 U CN205603228 U CN 205603228U CN 201620213312 U CN201620213312 U CN 201620213312U CN 205603228 U CN205603228 U CN 205603228U
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- pickling
- tank
- slip
- homogenizing
- carborundum
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Abstract
The utility model provides a powder obtains the carborundum powder after drying that carborundum purification clean system, the ground paste is made to carborundum in the slurrying pond, the ground paste enters into the pickling system in proper order after flotation device flotation edulcoration and magnet separator magnetic separation deironing in, get into the overflow classificator after the pickling deironing of pickling system in the overflow hierarchical, ground paste after hierarchical dewaters in sending into centrifuge after the homogenization is subsided by the homogenization system through subsiding, the dehydration back. The utility model discloses a combine flotation edulcoration, magnetic separation deironing and pickling deironing organic to detach impurity and micro - indisputable element in the carborundum, finally obtain the carborundum of high -purity, through with the pickling jar with subside the homogenization jar and all set one row to, then set up track and mobilizable over -and -under type rabbling mechanism above that to realized a rabbling mechanism to a plurality of jar internal stirrings, the cost of the equipment that has reduced substantially.
Description
Technical field
This utility model relates to the production preparation field of carborundum, a kind of silicon carbide purification cleaning system.
Background technology
Carborundum due to stable chemical performance, heat conductivity is high, thermal coefficient of expansion is little, anti-wear performance good, in addition to making abrasive material, the most a lot of other purposes.The industrial making method of carborundum is to refine in resistance furnace with high grade quartz sand and petroleum coke.Pure carborundum is colourless, and the palm fibre of commercial production to black system due to the impurity of iron content, the silicon carbide bulk refined, through broken, soda acid is washed, magnetic separation and screening or wet concentration and make the product of various granularity.
Owing to the carborundum of industrial production often containing the impurity such as ferrum, accordingly, it would be desirable to carborundum to be carried out purifying and classifying, thus obtain the silicon carbide powder of homogeneous grain diameter.In the prior art, simply carborundum is rinsed when producing carborundum remove impurity, obtains except ferrum, classification, but this mode of production, often lead to that carborundum still suffers from a small amount of ferrum element cannot remove, and in whole production technology, between each operation, generally require manpower carborundum is transported through, waste substantial amounts of manpower, the most inefficient, and period be likely to cause the secondary pollution of carborundum.
Utility model content
The problem that the de-ferrous effect existed during for solving and producing carborundum in prior art is bad, manpower degree of dependence high, production efficiency is low and easilys lead to secondary pollution, this utility model provides a kind of silicon carbide purification cleaning system, this system is first by carborundum slurrying, the most successively after flotation remove impurity, iron removal by magnetic separation, it is stirred silicon carbide slurry adds acid again, thus remove the trace iron element in carborundum, finally give highly purified carborundum, and after centrifugation after sedimentation homogenizing, dry and obtain product.
The technical scheme that this utility model is used by realizing above-mentioned technical purpose is: a kind of silicon carbide purification cleaning system, including slurrying pond, flotation device, magnetic separator, pickling system, overflow size separation device, sedimentation homogenization system and centrifuge, wherein, carborundum makes slip in slurrying pond, slip enters in pickling system successively after flotation device flotation remove impurity and magnetic separator iron removal by magnetic separation, overflow size separation device grading inside overflow is entered after pickling system pickling is except ferrum, slip after classification is sent in centrifuge after sedimentation homogenization system sedimentation homogenizing and is dehydrated, sic powder is obtained after powder drying after dehydration；
Described pickling system includes the some pickling tanks being arranged in a row and is arranged on the track above pickling tank, and track slides is provided with lifting type stirring mechanism, to be stirred each pickling tank；
nullDescribed lifting type stirring mechanism includes the bracket being driven it to move in orbit by actuating unit、The screw rod being arranged on bracket、Portal frame、Hoisting frame and shaft，Wherein，The lower end of screw rod is rotated by bearing and bearing block and is fixed on bracket，Top is rotationally connected with portal frame，And on portal frame, it is provided with the lifting motor of driving screw rod synchronous axial system，Hoisting frame forms screw drive by two screwed holes and two screw rods，So that screw rod drives hoisting frame to lift in rotation process，The shaft driven by rotary electric machine it is provided with on described hoisting frame，The bottom of shaft is provided with stirring vane，Described stirring vane includes at least three blades arranged around shaft same level cross section and is arranged on the fixed disk bottom shaft，The edge of fixed disk is evenly arranged with the scraper plate of at least three pieces，Described blade is the arc being upturned，Connection sheet it is vertically installed with bottom it，And the one end connected with shaft bottom connection sheet is arranged on the upper surface of fixed disk；
The top of described pickling tank is provided with the stirring passage passed for shaft and stirring vane, it is covered with cover plate on stirring passage, the top of pickling tank is arch, and the highest point of arch is provided with plastics adapter, plastics adapter is connected with negative-pressure pipeline with by an acid mist collecting cover, with the sour gas in collecting tank body；The top of pickling tank is provided with and feeds the charging aperture that house steward I is connected and the acid inlet tube being connected with acid adding pipeline, arranges and oriented be passed through compressed-air actuated air inlet pipe in it in the slip outlet bottom pickling tank, and air inlet pipe is connected with compressed air piping；
Described charging house steward I is for importing in pickling tank by the slip after magnetic separator magnetic separation, described slip outlet connects with plasma discharge house steward I, so that the slip after pickling is sent into overflow size separation device internal classification, the slip after classification is sent in sedimentation homogenization system by the overfall of overflow size separation device by charging house steward II；
Described sedimentation homogenization system includes several settling tanks arranged side by side of being in a straight line and a homogenizing tank, sedimentation feed pipe on each settling tank is all connected with charging house steward II, the sedimentation drainage conduit of settling tank is all connected with plasma discharge house steward II, and plasma discharge house steward II end is connected with the homogenizing feed pipe of homogenizing tank, it is also equipped with track above settling tank and homogenizing tank, slide on track and be provided with above-mentioned lifting type stirring mechanism, so that each settling tank and homogenizing tank are stirred, and all offer for shaft and the stirring passage of stirring vane turnover at settling tank and homogenizing tank top, it is covered with cover plate on stirring passage；
The homogenizing drainage conduit of described homogenizing tank is centrifuged in the slip that it is interior is sent to whizzer separating, and obtains product after the powder drying after separation.
The air inlet pipe being connected with compressed air piping it is respectively arranged with in the discharge gate of described settling tank and homogenizing tank.
The top of described pickling tank, settling tank and homogenizing tank is provided with drain pipe diagonally downward, and is provided with control valve on drain pipe.
Upper limit position switch and the lower position switch controlling lifting motor it is provided with on the track of described hoisting frame lifting.
The edge of described blade free end is inclined-plane, and from up to down gradually tapers up.
Described blade and scraper plate are misaligned in the projection of horizontal plane.
Described air inlet pipe uses with the slip outlet outer wall of pickling tank threadeds, and air inlet pipe is provided with branch sleeve, is provided with sealing rubber plug between air inlet pipe and branch sleeve.
The end-enclosed of described air inlet pipe, and it is densely covered with qi-emitting hole in end.
Described cover plate is combined into by symmetrically arranged two blocks of semicircular point of plates, the center on every piece point of board diameter limit is provided with semicircular groove, so that forming the hole accommodating shaft after two pieces of points of plate splits, one jiao of described two pieces of points of plates is all hinged on stirring passage by rotational pin symmetry, so that stirring passage is closed or opened to two pieces of points of plates in respective rotational pin rotation process.
This utility model is by arranging air inlet pipe in the discharge gate of pickling tank, settling tank and homogenizing tank, in discharge gate, compressed air is blasted by air inlet pipe, its objective is: prevent carborundum sedimentation blocking discharge gate, blast compressed air simultaneously wherein and can play the effect of auxiliary stirring.
Beneficial effect: this utility model compared with prior art, has the advantage that
1) this utility model is by organically combining flotation remove impurity, iron removal by magnetic separation and pickling except ferrum, thus removes the impurity in carborundum and trace iron element, finally gives highly purified carborundum；
2) this utility model is in a row by being arranged by pickling tank, arranges track and moveable lifting type stirring mechanism the most thereon, it is achieved thereby that all pickling tanks are stirred by a rabbling mechanism, drastically reduce the area the cost of equipment；
3) lifting agitating device of the present utility model, it is possible to lower and be stirred slip, departs from tank interior after stirring, the reaction of slip with acid will not be constituted any impact；There is bottom the shaft of lifting agitating device the stirring vane of unique texture, so that make the slip of tank body have an action of stirring upwards in whipping process, not only act as good stirring action, and the slip that inner tank wall adheres to can be played souring, it is therefore prevented that a large amount of adhesion depositions of carborundum；
4) acid mist collecting cover is set at pickling tank top, not only prevents acid mist from corroding plant and equipment, and restored acid mist can also reuse, thus conservation, it also avoid the acid mist pollution to environment；Air inlet pipe is set in slip outlet, it is intended that prevent carborundum sedimentation blocking slip outlet, and blasts compressed air wherein and can play the effect of auxiliary stirring；
5) need to deposit the regular hour due to silicon carbide slurry, therefore, this utility model by arranging several settling tank more, silicon carbide slurry is filled in settling tank the most successively, so, the settling tank being filled with carborundum at first is initially completed homogenizing certainly, then silicon carbide slurry therein is converged to homogenizing in last homogenizing tank, in case centrifuge dehydration；After once the silicon carbide slurry in any one settling tank is input in homogenizing tank, it is necessary to supplement silicon carbide slurry wherein in time, thus ensure that persistently carrying out of production.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model pickling system；
Fig. 2 is the structural representation of lifting type stirring mechanism；
Fig. 3 is the structural representation of stirring vane；
Fig. 4 is blade and the side view connecting sheet；
Fig. 5 is the structural representation of fixed disk and scraper plate；
Fig. 6 is the structural representation of pickling tank；
Fig. 7 is the structural representation of sedimentation homogenization system；
Fig. 8 is the structural representation of settling tank；
Fig. 9 is the structural representation of homogenizing tank；
Figure 10 is the structural representation of air inlet pipe；
Figure 11 is the structural representation of cover plate；
nullReference: 1、Pickling tank，101、Charging aperture，102、Slip outlet，103、Plastics are taken over，104、Acid mist collecting cover，2、Negative-pressure pipeline，3、Charging house steward I，4、Plasma discharge house steward I，5、Compressed air piping，501、Air inlet pipe，5011、Branch sleeve，5012、Sealing rubber plug，6、Acid adding pipeline，601、Acid inlet tube，7、Stirring vane，701、Blade，702、Connect sheet，703、Fixed disk，704、Scraper plate，8、Bracket，801、Actuating unit，9、Shaft，901、Rotary electric machine，902、Stirring passage，903、Cover plate，9031、Divide plate，9032、Groove，9033、Rotational pin，10、Portal frame，11、Hoisting frame，1101、Upper limit position switch，1102、Lower position switch，12、Lifting motor，13、Screw rod，14、Track，15、Settling tank，1501、Sedimentation feed pipe，1502、Sedimentation drainage conduit，16、Homogenizing tank，1601、Homogenizing feed pipe，1602、Homogenizing drainage conduit，17、Charging house steward II，18、Plasma discharge house steward II，19、Drain pipe.
Detailed description of the invention
As shown in the figure, a kind of silicon carbide purification cleaning system, including slurrying pond, flotation device, magnetic separator, pickling system, overflow size separation device, sedimentation homogenization system and centrifuge, wherein, carborundum makes slip in slurrying pond, slip enters in pickling system successively after flotation device flotation remove impurity and magnetic separator iron removal by magnetic separation, overflow size separation device grading inside overflow is entered after pickling system pickling is except ferrum, slip after classification is sent in centrifuge after sedimentation homogenization system sedimentation homogenizing and is dehydrated, and obtains sic powder after the powder drying after dehydration；
Described pickling system includes the some pickling tanks 1 being arranged in a row and is arranged on the track 14 above pickling tank 1, and track 14 slides is provided with lifting type stirring mechanism, to be stirred each pickling tank 1；
nullDescribed lifting type stirring mechanism includes being driven its bracket 8 moved on track 14 by actuating unit 801、The screw rod 13 being arranged on bracket 8、Portal frame 10、Hoisting frame 11 and shaft 9，Wherein，The lower end of screw rod 13 is rotated by bearing and bearing block and is fixed on bracket 8，Top is rotationally connected with portal frame 10，And on portal frame 10, it is provided with the lifting motor 12 of driving screw rod 13 synchronous axial system，Hoisting frame 11 forms screw drive by two screwed holes and two screw rods 13，So that screw rod 13 drives hoisting frame 11 to lift in rotation process，The shaft 9 driven by rotary electric machine 901 it is provided with on described hoisting frame 11，The bottom of shaft 9 is provided with stirring vane 7，Described stirring vane 7 includes at least three blades 701 arranged around shaft 9 same level cross section and is arranged on the fixed disk 703 bottom shaft 9，The edge of fixed disk 703 is evenly arranged with the scraper plate 704 of at least three pieces，Described blade 701 is the arc being upturned，Connection sheet 702 it is vertically installed with bottom it，And the one end connected with shaft 9 bottom connection sheet 702 is arranged on the upper surface of fixed disk 703；
The top of described pickling tank 1 is provided with the stirring passage 902 passed for shaft 9 and stirring vane 7, it is covered with cover plate 903 on stirring passage 902, the top of pickling tank 1 is arch, and the highest point of arch is provided with plastics adapter 103, plastics adapter 103 is connected with negative-pressure pipeline 2 with by an acid mist collecting cover 104, with the sour gas in collecting tank body；The top of pickling tank 1 is provided with and feeds the charging aperture 101 that house steward I 3 is connected and the acid inlet tube 601 being connected with acid adding pipeline 6, arranging in slip outlet 102 bottom pickling tank 1 and oriented be passed through compressed-air actuated air inlet pipe 501 in it, air inlet pipe 501 is connected with compressed air piping 5；
Described charging house steward I 3 is for importing in pickling tank 1 by the slip after magnetic separator magnetic separation, described slip outlet 102 connects with plasma discharge house steward I 4, so that the slip after pickling is sent into overflow size separation device internal classification, the slip after classification is sent in sedimentation homogenization system by the overfall of overflow size separation device by charging house steward II 17；
Described sedimentation homogenization system includes several settling tanks arranged side by side 15 of being in a straight line and a homogenizing tank 16, sedimentation feed pipe 1501 on each settling tank 15 is all connected with charging house steward II 17, the sedimentation drainage conduit 1502 of settling tank 15 is all connected with plasma discharge house steward II 18, and plasma discharge house steward II 18 end is connected with the homogenizing feed pipe 1601 of homogenizing tank 16, it is also equipped with track 14 above settling tank 15 and homogenizing tank 16, slide on track 14 and be provided with above-mentioned lifting type stirring mechanism, so that each settling tank 15 and homogenizing tank 16 are stirred, and all offer for shaft 9 and the stirring passage 902 of stirring vane 7 turnover at settling tank 15 and homogenizing tank 16 top, it is covered with cover plate 903 on stirring passage 902；
The homogenizing drainage conduit 1602 of described homogenizing tank 16 is centrifuged in the slip that it is interior is sent to whizzer separating, and obtains product after the powder drying after separation.
It is more than basic embodiment of the present utility model, can make further improvements, limit or optimize on the basis of above:
As, it is respectively arranged with the air inlet pipe 501 being connected with compressed air piping 5 in the discharge gate of described settling tank 15 and homogenizing tank 16；
And for example, the top of described pickling tank 1, settling tank 15 and homogenizing tank 16 is provided with drain pipe 19 diagonally downward, and is provided with control valve on drain pipe 19, with water unnecessary in discharging each tank body；
And for example, the track of described hoisting frame 11 lifting is provided with upper limit position switch 1101 and the lower position switch 1102 controlling lifting motor 12, thus limits the extreme position of stirring vane 7 raising and lowering.
And for example, the edge of described blade 701 free end is inclined-plane, and from up to down gradually tapers up；
Further, described blade 701 and scraper plate 704 are misaligned in the projection of horizontal plane；
For another example, described air inlet pipe 501 uses with slip outlet 102 outer wall of pickling tank 1 threadeds, and air inlet pipe 501 is provided with branch sleeve 5011, is provided with sealing rubber plug 5012 between air inlet pipe 501 and branch sleeve 5011；
Further, the end-enclosed of described air inlet pipe 501, and it is densely covered with qi-emitting hole in end；
Finally, described cover plate 903 is combined into by symmetrically arranged two blocks of semicircular point of plates 9031, the center on every piece point of plate 9031 diameter limit is provided with semicircular groove 9032, so that forming the hole accommodating shaft 9 after the split of two pieces of points of plates 9031, one jiao of described two pieces of points of plates 9031 is all hinged on stirring passage 902 by rotational pin 9033 symmetry, so that stirring passage 902 closed or open in respective rotational pin 9033 rotation process by two pieces of points of plates 9031.
Claims (9)
1. a silicon carbide purification cleaning system, including slurrying pond, flotation device, magnetic separator, pickling system, overflow size separation device, sedimentation homogenization system and centrifuge, wherein, carborundum makes slip in slurrying pond, slip enters in pickling system successively after flotation device flotation remove impurity and magnetic separator iron removal by magnetic separation, overflow size separation device grading inside overflow is entered after pickling system pickling is except ferrum, slip after classification is sent in centrifuge after sedimentation homogenization system sedimentation homogenizing and is dehydrated, sic powder is obtained after powder drying after dehydration, it is characterised in that:
Described pickling system includes the some pickling tanks (1) being arranged in a row and is arranged on the track (14) of pickling tank (1) top, and the upper slip of track (14) is provided with lifting type stirring mechanism, to be stirred each pickling tank (1)；
nullDescribed lifting type stirring mechanism includes being driven it at the bracket (8) of the upper motion of track (14) by actuating unit (801)、The screw rod (13) being arranged on bracket (8)、Portal frame (10)、Hoisting frame (11) and shaft (9)，Wherein，The lower end of screw rod (13) is rotated by bearing and bearing block and is fixed on bracket (8)，Top is rotationally connected with portal frame (10)，And on portal frame (10), it is provided with the lifting motor (12) of driving screw rod (13) synchronous axial system，Hoisting frame (11) forms screw drive by two screwed holes and two screw rods (13)，So that screw rod (13) drives hoisting frame (11) to lift in rotation process，The shaft (9) driven by rotary electric machine (901) it is provided with on described hoisting frame (11)，The bottom of shaft (9) is provided with stirring vane (7)，Described stirring vane (7) includes at least three blades (701) arranged around shaft (9) same level cross section and is arranged on the fixed disk (703) of shaft (9) bottom，The edge of fixed disk (703) is evenly arranged with the scraper plate (704) of at least three pieces，Described blade (701) is the arc being upturned，Connection sheet (702) it is vertically installed with bottom it，And one end that connection sheet (702) bottom connects with shaft (9) is arranged on the upper surface of fixed disk (703)；
The top of described pickling tank (1) is provided with the stirring passage (902) passed for shaft (9) and stirring vane (7), it is covered with cover plate (903) in stirring passage (902), the top of pickling tank (1) is arch, and the highest point of arch is provided with plastics adapter (103), plastics adapter (103) are connected with negative-pressure pipeline (2) with by an acid mist collecting cover (104), with the sour gas in collecting tank body；The top of pickling tank (1) is provided with and feeds the charging aperture (101) that house steward I (3) is connected and the acid inlet tube (601) being connected with acid adding pipeline (6), arranging in the slip outlet (102) of pickling tank (1) bottom and oriented be passed through compressed-air actuated air inlet pipe (501) in it, air inlet pipe (501) is connected with compressed air piping (5)；
Described charging house steward I (3) is for importing in pickling tank (1) by the slip after magnetic separator magnetic separation, described slip outlet (102) connects with plasma discharge house steward I (4), so that the slip after pickling is sent into overflow size separation device internal classification, the slip after classification is sent in sedimentation homogenization system by the overfall of overflow size separation device by charging house steward II (17)；
nullDescribed sedimentation homogenization system includes several settling tanks arranged side by side (15) of being in a straight line and a homogenizing tank (16)，Sedimentation feed pipe (1501) on each settling tank (15) is all connected with charging house steward II (17)，The sedimentation drainage conduit (1502) of settling tank (15) is all connected with plasma discharge house steward II (18)，And plasma discharge house steward II (18) end is connected with the homogenizing feed pipe (1601) of homogenizing tank (16)，It is also equipped with track (14) at settling tank (15) and homogenizing tank (16) top，The upper slip of track (14) is provided with above-mentioned lifting type stirring mechanism，So that each settling tank (15) and homogenizing tank (16) are stirred，And all offer, at settling tank (15) and homogenizing tank (16) top, the stirring passage (902) passed in and out for shaft (9) and stirring vane (7)，It is covered with cover plate (903) in stirring passage (902)；
The homogenizing drainage conduit (1602) of described homogenizing tank (16) is centrifuged in the slip that it is interior is sent to whizzer separating, and obtains product after the powder drying after separation.
A kind of silicon carbide purification cleaning system the most according to claim 1, it is characterised in that: it is respectively arranged with the air inlet pipe (501) being connected with compressed air piping (5) in the discharge gate of described settling tank (15) and homogenizing tank (16).
A kind of silicon carbide purification cleaning system the most according to claim 1, it is characterized in that: the top of described pickling tank (1), settling tank (15) and homogenizing tank (16) is provided with drain pipe (19) diagonally downward, and is provided with control valve on drain pipe (19).
A kind of silicon carbide purification cleaning system the most according to claim 1, it is characterised in that: it is provided with upper limit position switch (1101) and the lower position switch (1102) controlling lifting motor (12) on the track that described hoisting frame (11) lifts.
A kind of silicon carbide purification cleaning system the most according to claim 1, it is characterised in that: the edge of described blade (701) free end is inclined-plane, and from up to down gradually tapers up.
A kind of silicon carbide purification cleaning system the most according to claim 1, it is characterised in that: described blade (701) is misaligned in the projection of horizontal plane with scraper plate (704).
A kind of silicon carbide purification cleaning system the most according to claim 1, it is characterized in that: described air inlet pipe (501) uses with slip outlet (102) outer wall of pickling tank (1) threadeds, and air inlet pipe (501) is provided with branch sleeve (5011), it is provided with sealing rubber plug (5012) between air inlet pipe (501) and branch sleeve (5011).
A kind of silicon carbide purification cleaning system the most according to claim 7, it is characterised in that: the end-enclosed of described air inlet pipe (501), and it is densely covered with qi-emitting hole in end.
A kind of silicon carbide purification cleaning system the most according to claim 1, it is characterized in that: described cover plate (903) is combined into by symmetrically arranged two pieces semicircular point plate (9031), the center on every piece point of plate (9031) diameter limit is provided with semicircular groove (9032), so that forming the hole accommodating shaft (9) after the split of two pieces of points of plates (9031), one jiao of described two pieces of points of plates (9031) is all hinged in stirring passage (902) by rotational pin (9033) symmetry, so that two pieces of points of plates (9031) close or open stirring passage (902) in respective rotational pin (9033) rotation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620213312.5U CN205603228U (en) | 2016-03-21 | 2016-03-21 | Carborundum purification clean system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620213312.5U CN205603228U (en) | 2016-03-21 | 2016-03-21 | Carborundum purification clean system |
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| Publication Number | Publication Date |
|---|---|
| CN205603228U true CN205603228U (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620213312.5U Expired - Fee Related CN205603228U (en) | 2016-03-21 | 2016-03-21 | Carborundum purification clean system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565320A (en) * | 2016-03-21 | 2016-05-11 | 平顶山市国邦新材料有限公司 | Silicon carbide purification system |
| CN107159443A (en) * | 2017-06-28 | 2017-09-15 | 烟台华锐微粉有限公司 | A kind of quiet levigation method of powder |
-
2016
- 2016-03-21 CN CN201620213312.5U patent/CN205603228U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565320A (en) * | 2016-03-21 | 2016-05-11 | 平顶山市国邦新材料有限公司 | Silicon carbide purification system |
| CN107159443A (en) * | 2017-06-28 | 2017-09-15 | 烟台华锐微粉有限公司 | A kind of quiet levigation method of powder |
| CN107159443B (en) * | 2017-06-28 | 2019-02-22 | 烟台华锐微粉有限公司 | A kind of quiet levigation method of powder |
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| 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: 20160928 Termination date: 20190321 |
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| CF01 | Termination of patent right due to non-payment of annual fee |