CN202246714U - Water quenching system of mobile slag pot utilizing residual heat of molten slag with water quenching steam process - Google Patents
Water quenching system of mobile slag pot utilizing residual heat of molten slag with water quenching steam process Download PDFInfo
- Publication number
- CN202246714U CN202246714U CN2011203766349U CN201120376634U CN202246714U CN 202246714 U CN202246714 U CN 202246714U CN 2011203766349 U CN2011203766349 U CN 2011203766349U CN 201120376634 U CN201120376634 U CN 201120376634U CN 202246714 U CN202246714 U CN 202246714U
- Authority
- CN
- China
- Prior art keywords
- shrend
- slag
- jar
- slag ladle
- steam
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/074—Tower structures for cooling, being confined but not sealed
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
Abstract
The utility model relates to a water quenching system of a mobile slag pot utilizing residual heat of molten slag with a water quenching steam process. A high-temperature-resistant seal ring is embedded in the inner wall of a water quenching tank, and a pressure equalizing hole and a steam outlet are arranged in the side wall of the water quenching tank; a slag outlet sliding water gap is mounted in the bottom of the slag pot, an upper port is sealed by a refractory cover and a high-temperature-resistant rubber cover, and a lifting lug and the pressure equalizing hole are arranged on the side surface; the full slag pot is lifted above the water quenching tank and then placed down, and the outer surface of the slag pot and the seal ring in the water quenching tank are sealed by relying on gravity; and a flexible pipe is connected with the upper and the lower pressure equalizing holes, and steam flows out of the pressure equalizing hole of the water quenching tank for pressurizing the molten slag in the slag pot; and the steam which flows out of the outlet of the water quenching tank enters into a primary loop of a heat exchanger for heat release, and a pressure building valve is arranged at the outlet of the primary loop for increasing the pressure in the water quenching tank.
Description
Affiliated technical field
The utility model relates to a kind of shrend steaming process and utilizes iron-making and steel-making melting slag waste heat system, and especially the shrend steaming process utilizes the iron-making and steel-making melting slag waste heat to move slag ladle shrend system.
Background technology
At present, known steel-making ironmaking slag quantity and heat content are all very huge, but do not find the good method of melting slag waste heat of utilizing for a long time.Application number is that a kind of slag shrend continuously in encloses container, shrend generation steam of making of the patent of invention proposition of 200610045538.X flows out continuously, drives the method that the steam turbine rotation utilizes melting slag waste heat with HP steam stream through pipeline, and this method is called the slag water quenching steaming process.After this patent proposed, application number was the improvement that the patent of invention of 200710014446.X proposes this method again.Receiver is fixed on shrend jar top in the said 200710014446.X patent, has that the receiver volume is very big, shrend jar and receiver be not easy to problems such as maintenance, on-the-spot difficult installation.
Summary of the invention
Receiver is fixed on the deficiency that shrend jar top is brought in the 200710014446.X patent in order to overcome, and the utility model proposes to form the shrend system by fixing mobile slag ladle devices such as shrend jar, a plurality of removable slag ladle and driving.
The utility model solves the technical scheme that its technical problem adopted
The shrend jar is fixed on the cold-slag slagging device of bottom; The shrend tank top is uncovered, leaves groove on the inwall under the opening of shrend tank top, and groove is embedded in high-temperature resistant seal ring; Balancing orifice and vapour outlet are left in the side on the interior ponding liquid level of shrend jar; Removable slag ladle liner flame retardant coating, lower external face is taper or circular arc, the slide gate nozzle of slagging tap is installed in the bottom, open top, fire-resistant lid and high-temperature resistant rubber sealing cover can cover in open top successively, and outer high-temperature resistant rubber lid can be locked and make the slag ladle sealing; Hanger is equipped with in removable slag ladle side, and a jar side has balancing orifice on the interior slag liquid level of slag ladle.
When slag ladle advances slag with two-layer top cover open, the basal sliding mouth of a river closes, mobile slag ladle devices such as driving hang slag ladle under iron-smelting blast furnace or the steel-making converter slag notch, blast furnace or converter are discharged slag and are flowed into slag ladle; Slag ladle is filled behind the slag blast furnace or converter temporarily stops deslagging, and the slag ladle of filling covers fire-resistant lid and high-temperature resistant rubber sealing cover, and the high-temperature resistant rubber sealing cover is locked; Mobile slag ladle devices such as driving will be filled slag ladle and hang and put down on the shrend jar, and mobile receiver devices such as driving hang empty slag ladle under iron-smelting blast furnace or the steel-making converter slag notch, and blast furnace or converter continue deslagging.
Slag ladle lower taper outside surface closely contacts with shrend jar top inner seal ring on the shrend jar, seals between realization of top slag ladle self gravitation and the bottom shrend jar; Between slag ladle lower taper outside surface and the shrend jar top inner seal ring narrow slit is arranged, externally make the sealing-ring cooling to said narrow slit water spray; With soft seal pipe coupling bottom shrend jar balancing orifice and top slag ladle balancing orifice; Open the slag ladle basal sliding mouth of a river with the external opening sliding nozzle device, slag flows into bottom shrend jar, and the interior hydraulic giant ejection of shrend jar High-Pressure Water smashes the concurrent unboiled water of inflow slag and quenches, and slag falls is gone into the interior ponding of shrend jar shrend is also taken place.
Producing steam in the shrend jar flows out through balancing orifice and vapour outlet; Flow out steam from balancing orifice and get into the top slag ladle through the soft seal pipe; Realization is to slag pressurization in the slag ladle of top; Flow out steam from vapour outlet and pass through steam switching valve access main steam header road, steam gets into interchanger primary loop heat exchange in the main pipe line, and steam condensate is the outlet outflow through the interchanger primary loop; Primary loop outlet dress shutoff pressure valve increases shrend jar internal pressure; The main steam header road also can insert electric precipitator, and shrend steam gets in the electric precipitator and directly utilizes after the dedusting.
Slag ladle has gone out slag closes its basal sliding mouth of a river, and soft seal pipe between shrend jar balancing orifice and the slag ladle balancing orifice is broken off, and moves the slag ladle device slag ladle is hung the shrend jar, cleaning maintenance slag ladle; A shrend point is established fixedly mobile receiver devices such as shrend jar, the granulating unit of bottom cold-slag slagging device, a plurality of slag ladle and a cover driving of two covers, another set of granulating unit transposing slag ladle, cleaning, maintenance during a cover granulating unit job.
The beneficial effect of the utility model
Adopt a plurality of removable slag ladles, each slag ladle volume can be less; Only need when blast furnace, converter deslagging slag ladle is placed under blast furnace, the converter slag notch, identical with existing blast furnace, converter slag ladle deslagging technological process; No matter blast furnace, converter size, slag ladle and shrend jar can adopt with a kind of specification, and slag ladle and shrend jar can stdn; Slag ladle and the easy access of shrend jar, the on-the-spot installation is convenient in the shrend system.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the removable slag ladle slag input of a utility model synoptic diagram;
Fig. 2 is the 1st embodiment schematic diagram of the removable slag ladle shrend of the utility model system;
Fig. 3 is the 2nd embodiment schematic diagram of the removable slag ladle shrend of the utility model system.
In Fig. 1,1. ironmaking, steel-smelting clinker notch, 2. slag stream, 3. slag ladle is suitable for reading, 4. slag ladle body, 5. slag ladle hanger, 6. flame retardant coating in the slag ladle, 7. slag ladle tapered lower portion, 8. slag ladle bottom slag-drip opening, 9. slag ladle lower bracket.
In Fig. 2,0. slag ladle is suitable for reading, 1. slag ladle outer layer rubber sealing cover suitable for reading, the 2. fire-resistant lid of slag ladle internal layer suitable for reading, 3. slag liquid level in the slag ladle; 4. slag in the slag ladle, 5. flame retardant coating in the slag ladle, 6. slag ladle body, 7. the slag ladle hanger 8. connects slag ladle and shrend jar soft seal pipe; 9. shrend pipeline, 10. ponding liquid level in the shrend jar, 11. flushing cinder hydraulic giants, the 12. slag ladles bottom slide gate nozzle of slagging tap, 13. flow out the shrend steam; 14. the shrend steam-pipe, 15. shrend jars, the cold slag valve in the 1st road under the 16. shrend jars, separate cavities under the 17. shrend jars, the cold slag valve in the 2nd road under 18. separate cavities; 19. the spiral slag off apparatus, 20. clean steam flow out pipeline, and 21. flow out clean steam, 22. shrend vapor condensation water outs, 23. interchanger; 24. clean water pump, 25. clean waters get into heat exchanger tube, 26. slag ladle tapered lower portion, mouth sealing ring on the 27. shrend jars, 28. interchanger primary loops outlet shutoff pressure valve; 29. shrend steam switching valve, 30. the 2nd shrend jar steam switching valves, 31. the 2nd shrend jars flow out steam, 32. the 2nd shrend jar steam-pipes, 33. watermarks; 34. the spilling water jar, 35. slag ladle steam balancing orifices, 36. shrend jar balancing orifices, 37. shrend jar vapour outlets, 38. open and close sliding nozzle device.
In Fig. 3,0. slag ladle is suitable for reading, 1. slag ladle outer layer rubber sealing cover suitable for reading, the 2. fire-resistant lid of slag ladle internal layer suitable for reading, 3. slag liquid level in the slag ladle; 4. slag in the slag ladle, 5. flame retardant coating in the slag ladle, 6. slag ladle body, 7. the slag ladle hanger 8. is communicated with slag ladle and shrend jar soft seal pipe; 9. shrend pipeline, 10. ponding liquid level in the shrend jar, 11. flushing cinder hydraulic giants, the 12. slag ladles bottom slide gate nozzle of slagging tap, 13. flow out the shrend steam; 14. the shrend steam-pipe, 15. shrend jars, the cold slag valve in the 1st road under the 16. shrend jars, separate cavities under the 17. shrend jars, the cold slag valve in the 2nd road under 18. separate cavities; 19. the spiral slag off apparatus, 20. clean steam flow out pipeline, and 21. flow out clean steam, 23. electric precipitator; 26. the slag ladle tapered lower portion, mouth sealing ring on the 27. shrend jars, 29. shrend steam switching valves, 30. the 2nd shrend jar steam switching valves; 31. the 2nd shrend jar flows out steam, 32. the 2nd shrend jar steam-pipes, 33. watermarks, 34. spilling water jars; 35. slag ladle steam balancing orifice, 36. shrend jar balancing orifices, 37. shrend jar vapour outlets, 38. open and close sliding nozzle device.
Embodiment
In Fig. 1, slag ladle (4) is hung under ironmaking, the steel-smelting clinker notch (1), slag ladle (4) is put on the support (9), slag ladle (4) (3) suitable for reading opens wide, and bottom slag-drip opening (8) is closed, and molten slag stream (2) flows into slag ladle (4) from slag ladle (3) suitable for reading.
In Fig. 2; Near ironmaking, steel melting furnace, set up granulating unit shown in two cover (9), (11), (15)～(19), slag ladle (6) liner flame retardant coating (5) is stamped fire-resistant lid of internal layer (2) and outer layer rubber sealing cover (1) on the flame retardant coating (5); Slag ladle (6) outer side is equipped with hanger (7); The side has balancing orifice (35) on the interior slag liquid level of slag ladle (6) (3), and slag ladle (6) bottom (26) is taper, and the slide gate nozzle of slagging tap (12) is equipped with in slag ladle (6) bottom; Shrend jar (15) open top; The internal surface groove is embedded with sealing-ring (27) under shrend jar (15) open top; The side has balancing orifice (36) and vapour outlet (37) on the interior ponding liquid level of shrend jar (15) (10), and shrend jar (15) has the sealing cold-slag slagging device that separate cavities (17), spiral slag off apparatus (19), twice valve (16), (18) etc. are formed; When advancing slag with the two-layer top cover of slag ladle (6) (1), (2) open, the basal sliding mouth of a river (12) close; Mobile slag ladle devices such as driving hook slag ladle hanger (7) slag ladle are hung under iron-smelting blast furnace or the steel-making converter slag notch, and blast furnace or converter are discharged slag and flowed into slag ladle from (0) suitable for reading; Slag ladle is filled two-layer top cover (1), (2) on the slag bonnet; High-temperature resistant rubber sealing cover (1) is locked; Running gears such as driving will be filled slag ladle (6) and hang on the shrend jar (15) and put down, and mouth sealing ring (27) closely contact to form and seals on slag ladle (6) conical lower portion (26) and the shrend jar; Connect balancing orifice (35), (36) with seal tube (8); Open shrend jar (15) the steam-pipe switching valve that connects (29); Close another shrend jar and connect steam-pipe switching valve (30); Open slag ladle (6) the basal sliding mouth of a river (12) with opening and closing sliding nozzle device (38), slag flows into shrend jar (15) through the mouth of a river of slagging tap (12) in the slag ladle; Penetrating High-Pressure Water from flushing cinder hydraulic giant (11) smashes from slide gate nozzle (12) outflow slag stream; Producing steam in the shrend jar (15) flows out from balancing orifice (36) and outlet (37); Flow out steam from balancing orifice (36) and get on slag ladle (6) the slag liquid level (3), the interior slag of slag ladle (6) (4) is pressurizeed through soft seal pipe (8); Flow out steam (13) from vapour outlet (37) and get into interchanger (23) primary loop through steam-pipe (14) and valve (29); Steam heat release condensation in interchanger (23) primary loop; The shrend steam condensate is emitted through outlet (22), and interchanger primary loop outlet shutoff pressure valve (28) makes shrend steam reach high pressure; Clean water pump (24) is squeezed into clean water for the interchanger secondary circuits, and the water purification in the interchanger secondary circuits absorbs and becomes clean steam (21) after the primary loop emits heat, flows out from pipeline (20).
At Fig. 3; Near ironmaking, steel melting furnace, set up granulating unit shown in two cover (9), (11), (15)～(19), slag ladle (6) liner flame retardant coating (5) is stamped fire-resistant lid of internal layer (2) and outer layer rubber sealing cover (1) on the flame retardant coating (5); Slag ladle (6) outer side is equipped with hanger (7); The side has balancing orifice (35) on the interior slag liquid level of slag ladle (6) (3), and slag ladle (6) bottom (26) is taper, and the slide gate nozzle of slagging tap (12) is equipped with in slag ladle (6) bottom; Shrend jar (15) open top; The internal surface groove is embedded with sealing-ring (27) under shrend jar (15) open top; The side has balancing orifice (36) and vapour outlet (37) on the interior ponding liquid level of shrend jar (15) (10), and shrend jar (15) has the sealing cold-slag slagging device that separate cavities (17), spiral slag off apparatus (19), twice valve (16), (18) etc. are formed; When advancing slag with the two-layer top cover of slag ladle (6) (1), (2) open, the basal sliding mouth of a river (12) close; Mobile slag ladle devices such as driving hook slag ladle hanger (7) slag ladle are hung under iron-smelting blast furnace or the steel-making converter slag notch, and blast furnace or converter are discharged slag and flowed into slag ladle from (0) suitable for reading; Slag ladle is filled two-layer top cover (1), (2) on the slag bonnet; High-temperature resistant rubber sealing cover (1) is locked; Running gears such as driving will be filled slag ladle (6) and hang on the shrend jar (15) and put down, and mouth sealing ring (27) closely contact to form and seals on slag ladle (6) conical lower portion (26) and the shrend jar; Connect balancing orifice (35), (36) with seal tube (8); Open shrend jar (15) the steam-pipe switching valve that connects (29) with opening and closing sliding nozzle device (38); Close another shrend jar and connect steam-pipe switching valve (30); Open slag ladle (6) the basal sliding mouth of a river (12), slag flows into shrend jar (15) through the mouth of a river of slagging tap (12) in the slag ladle; Penetrating High-Pressure Water from flushing cinder hydraulic giant (11) smashes from slide gate nozzle (12) outflow slag stream; Producing steam in the shrend jar (15) flows out from balancing orifice (36) and outlet (37); Flow out steam from balancing orifice (36) and get on slag ladle (6) the slag liquid level (3), the interior slag of slag ladle (6) (4) is pressurizeed through soft seal pipe (8); Flow out steam (13) from vapour outlet (37) and get into electric precipitator (23), in electric precipitator (23), become clean steam (21) after the dedusting, flow out from pipeline (20) through steam-pipe (14) and valve (29).
Claims (3)
1. a shrend steaming process utilizes the iron-making and steel-making melting slag waste heat to move slag ladle shrend system, it is characterized in that: form the shrend system by fixed lower part cold-slag slagging device and top shrend jar, a plurality of removable slag ladle, driving or crane etc.; The shrend tank top is uncovered, and upper inside wall is embedded with high-temperature resistant seal ring, and the side has balancing orifice and vapour outlet, the switching sliding nozzle device from the outside is housed on jar interior ponding liquid level; Removable slag ladle lower external face is taper or circular arc, and the slide gate nozzle of slagging tap is installed in the bottom, open top, and fire-resistant lid and refractory seals lid can cover in open top successively, and outer refractory seals lid can be locked; Outer side is equipped with hanger, and the side has balancing orifice on jar interior slag liquid level; During the slag ladle slag input with top cover all open, the basal sliding mouth of a river closes, and slag ladle is hung under blast furnace or the converter slag notch, makes slag flow into slag ladle; Cover said fire-resistant lid and refractory seals lid after slag ladle is filled successively, lock outer refractory seals lid; Slag ladle is hung on the shrend jar, and the slag ladle lower external face closely contacts with shrend jar top inner seal ring, and the top slag ladle leans between self gravitation realization and the bottom shrend jar and seals; With flexible pipe bottom shrend jar balancing orifice is connected with top slag ladle balancing orifice; Open the slag ladle basal sliding mouth of a river with the outside mouth of a river device that opens and closes of shrend jar, slag flows into bottom shrend jar in the slag ladle; The interior hydraulic giant ejection of inflow bottom shrend jar slag and shrend jar current meet or fall into ponding generation shrend in the shrend jar; Shrend produces steam through shrend jar balancing orifice and vapour outlet outflow in the shrend jar; Flowing out steam from balancing orifice gets on the slag ladle slag liquid level of top slag pressurization in the slag ladle through all pressing flexible pipe; Flow out steam from vapour outlet and emit heat through entering interchanger primary loop, main steam header road; Steam condensate is the outlet outflow through the primary loop, and primary loop outlet dress shutoff pressure valve increases shrend jar and main steam line internal pressure; Interchanger secondary circuits clean water absorbs heat and becomes clean steam outflow confession use; Slag ladle has gone out slag and has broken off soft pipeline between shrend jar balancing orifice and the slag ladle balancing orifice, and it is subsequent use that slag ladle is sling.
2. a kind of shrend steaming process according to claim 1 utilizes the iron-making and steel-making melting slag waste heat to move slag ladle shrend system, it is characterized in that: the main steam header road inserts electric precipitator, and shrend steam is supplied after the dedusting to use in electric precipitator.
3. a kind of shrend steaming process according to claim 1 and 2 utilizes the iron-making and steel-making melting slag waste heat to move slag ladle shrend system; It is characterized in that: a shrend point is provided with two cover fixed lower part cold-slag slagging device and top shrend jars; Each shrend jar vapour outlet is connected with the main steam header road through a steam switching valve, and another shrend jar vapour outlet switching valve cuts out during a shrend jar job.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203766349U CN202246714U (en) | 2011-09-29 | 2011-09-29 | Water quenching system of mobile slag pot utilizing residual heat of molten slag with water quenching steam process |
| PCT/CN2012/001334 WO2013044595A1 (en) | 2011-09-29 | 2012-09-29 | Movable slag tank water quenching system utilizing waste heat of molten slag by using water quenching steam method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203766349U CN202246714U (en) | 2011-09-29 | 2011-09-29 | Water quenching system of mobile slag pot utilizing residual heat of molten slag with water quenching steam process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202246714U true CN202246714U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203766349U Expired - Fee Related CN202246714U (en) | 2011-09-29 | 2011-09-29 | Water quenching system of mobile slag pot utilizing residual heat of molten slag with water quenching steam process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202246714U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304594A (en) * | 2011-09-29 | 2012-01-04 | 魏明 | Slag-pot-movable water quenching system utilizing excess heat of molten slag based on water quenching steam method |
| WO2013044595A1 (en) * | 2011-09-29 | 2013-04-04 | 魏明 | Movable slag tank water quenching system utilizing waste heat of molten slag by using water quenching steam method |
| CN104694678A (en) * | 2015-03-25 | 2015-06-10 | 中冶建筑研究总院有限公司 | Telescopic-type steam discharging and dedusting method and device for hot splashing field |
| CN110342844A (en) * | 2019-02-28 | 2019-10-18 | 四川新磷环保技术有限公司 | A kind of automatic discharge gas gathering system being used to prepare high potential activity yellow phosphorus furnace slag |
-
2011
- 2011-09-29 CN CN2011203766349U patent/CN202246714U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304594A (en) * | 2011-09-29 | 2012-01-04 | 魏明 | Slag-pot-movable water quenching system utilizing excess heat of molten slag based on water quenching steam method |
| WO2013044595A1 (en) * | 2011-09-29 | 2013-04-04 | 魏明 | Movable slag tank water quenching system utilizing waste heat of molten slag by using water quenching steam method |
| CN102304594B (en) * | 2011-09-29 | 2014-12-03 | 魏明 | Slag-pot-movable water quenching system utilizing excess heat of molten slag based on water quenching steam method |
| CN104694678A (en) * | 2015-03-25 | 2015-06-10 | 中冶建筑研究总院有限公司 | Telescopic-type steam discharging and dedusting method and device for hot splashing field |
| CN104694678B (en) * | 2015-03-25 | 2016-08-24 | 中冶建筑研究总院有限公司 | A kind of telescopic row's Steam Dust method and apparatus for hot application field |
| CN110342844A (en) * | 2019-02-28 | 2019-10-18 | 四川新磷环保技术有限公司 | A kind of automatic discharge gas gathering system being used to prepare high potential activity yellow phosphorus furnace slag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20120929 |