CN101665879A - Crude zinc smelting method and smelting kiln used thereby - Google Patents
Crude zinc smelting method and smelting kiln used thereby Download PDFInfo
- Publication number
- CN101665879A CN101665879A CN200910307926A CN200910307926A CN101665879A CN 101665879 A CN101665879 A CN 101665879A CN 200910307926 A CN200910307926 A CN 200910307926A CN 200910307926 A CN200910307926 A CN 200910307926A CN 101665879 A CN101665879 A CN 101665879A
- Authority
- CN
- China
- Prior art keywords
- smelting
- kiln
- zinc
- section
- preheating
- 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.)
- Granted
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a crude zinc smelting method and a smelting kiln used thereby. The method comprises the following steps: a pyrometallury technique is adopted for smelting and the smelting steps comprise loading, preheating, high-temperature smelting and condensing; the smelting kiln is internally provided with a preheating section, a high-temperature smelting section and a condenser; the raw materials are loaded into the smelting kiln by a feed inlet of the smelting kiln, and then enter the high-temperature smelting section for heating after the preheating section is preheated, and thegenerated zinc steam enters the condenser for condensation; the condensed waste gas enters the preheating section to preheat the raw material, and is exhausted out the smelting kiln by a gas outlet arranged on the smelting kiln, and the waste gas uses a cloth bag for removing dust; and the zinc solution generated by condensation is discharged to a zinc storing tank by a liquid outlet arranged onthe smelting kiln, and the waste residue is discharged out the smelting kiln by a spiral residue-discharging device arranged at the tail part of the smelting kiln. The invention is characterized by small occupied area, large yield, high heat utilization ratio, high recovery ratio, low production cost, capability of treating various renewable zinc ash raw materials and the like, not only is suitable for crude zinc smelting, but also is suitable for smelting other similar non-ferrous metals.
Description
Technical field
The present invention relates to a kind of crude zinc smelting process and used smelting kiln, belong to the zinc technical field of smelting.
Background technology
In the prior art, the smelting process of metallic zinc mainly is divided into two kinds of wet method and pyrogenic processes.The investment of hydrometallurgy is huge, the wastewater treatment difficulty, and strong to material choice, area occupied is big, and investment is big, and the consumption chemical adjuvant is many; Pyrometallurgical smelting has perpendicular jar of a smelting, blast furnace smelting and electrosmelting etc., has all that the unit output investment is big, production cost is high, energy consumption is high, to shortcomings such as material choice are strong, and the equipment complexity, and floor space is big.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of low cost, high efficiency crude zinc smelting process and used smelting kiln.This method can be produced continuously, heat energy utilization rate height, and production cost is low.
For solving the problems of the technologies described above technical scheme of the present invention: a kind of crude zinc smelting process.It adopts pyrometallurgical smelting process to smelt, and smelts step and comprises charging, preheating, pyrotic smelting and condensation; In smelting kiln, be provided with preheating section, pyrotic smelting section and condenser; Raw material enters the heating of pyrotic smelting section by the opening for feed of the smelting kiln smelting kiln of packing into after the preheating section preheating, the zinc fume of generation enters condenser condenses; Condensed waste gas enters preheating section raw material is carried out preheating, and discharges outside the smelting kiln waste gas bag-type dust by being located at the air outlet that smelts on the kiln; The zinc liquid that condensation produces drains among the Chu Xinchi by being located at the liquid outlet of smelting on the kiln, and waste residue is discharged outside the smelting kiln by being located at the spiral deslagging device of smelting the kiln afterbody.
In the above-mentioned crude zinc smelting process, smelt kiln and adopt the rotation form, smelt kiln average rate constantly rotation slowly in smelting process.
In the aforesaid crude zinc smelting process, zinc fume is condensed after the negative pressure of chamber sucks condenser, in narrow passage with on the mutual extrusion and collision condensation of zinc liquid phase of irritating under the condensing chamber.
In the aforesaid crude zinc smelting process, the pyrotic smelting section is to adopt rotating transformer to introduce electric current, and by Graphite Electrodes energising heating.
In the aforesaid crude zinc smelting process, zinc liquid comes downwards to when bottom at condensing chamber, and zinc hydrorrhea more than needed goes out condensing chamber, enters liquid outlet, and increases pressure that the back produces by zinc liquid liquid level and wash the zinc gray of filling in the liquid outlet open and drain among the Chu Xinchi automatically.
In the aforesaid crude zinc smelting process, raw material and zinc fume are to reach being separated from each other of solid phase and gas phase by kiln body intermediary defeated material rotating cylinder and condenser.
A kind of crude zinc is smelted kiln.Constitute and to comprise and on described kiln body, be provided with opening for feed, air outlet, liquid outlet and slag notch by the kiln body, in liquid outlet, be filled with zinc gray; Chu Xinchi is arranged below liquid outlet; Be provided with preheating section, pyrotic smelting section and condenser in the kiln body, in the pyrotic smelting section Graphite Electrodes be housed, Graphite Electrodes connects rotary transformer; Transmission mechanism is arranged at the bottom at the kiln body.
Above-mentioned crude zinc is smelted in the kiln, and described opening for feed and air outlet are positioned at preheating section one side of kiln body and keep apart mutually, and the air outlet is positioned at the outside of opening for feed; Slag notch is positioned at pyrotic smelting section one side of kiln body.
Aforesaid crude zinc is smelted in the kiln, in described Graphite Electrodes the inside the silicon carbide heat-conducting layer is arranged.
Aforesaid crude zinc is smelted in the kiln, is provided with defeated material rotating cylinder between described preheating section and pyrotic smelting section, at defeated material rotating cylinder front end the material lifting gear is arranged.
Beneficial effect of the present invention: the present invention with charging, preheating, pyrotic smelting, condensation, put in the smelting kiln that zinc and deslagging all concentrate on a rotation and finish, equipment is simple, floor space is little, economizes ground, cost is low.Because its smelting speed is fast, treatment capacity is big, output is high, so the unit output floor space still less, the unit output investment is also few again.Because preheating, pyrotic smelting, condensation are all carried out in the smelting kiln of a rotation, so material loss is little, rate of recovery height, material adds thermal balance, and energy consumption is low.Because energy consumption is low, specific investment is few, the rate of recovery is high, can use low-cost raw material, therefore, production cost of the present invention is very low.The present invention adopts Graphite Electrodes energising heating in the pyrotic smelting section, and small amount of exhaust gas adopts bag collection in preheating section cooling back, and remaining carbon monoxide can be used as fuel, adds that whole energy consumption is low, and the feature of environmental protection is good, meets the environmental emission reduction requirement.The present invention smelts the rotation of kiln in the condensing chamber utilization, make zinc liquid and zinc fume two-phase mutual extrusion, collision (zinc rain, two kinds of condensing modes of extruding mutually combine) in narrow passage, and since condensing chamber near evaporator section, it is low to reoxidize rate, the big condensing rate of the temperature difference is fast, condensation effect is good, and waste gas is few, ash is few, the direct yield height.Raw material and zinc fume are to reach being separated from each other of solid phase and gas phase by kiln body intermediary defeated material rotating cylinder and condenser among the present invention, and this is the difference of the present invention and common pyrometallurgical smelting maximum.Because the material rate of heating is fast, homogeneous heating, so smelting temperature is lower, tap to tap time is short, adds and utilizes waste gas, condensing chamber heat radiation to come pre-thermal material, reduces greatly so smelt energy consumption.When going out zinc liquid, in the rotary course of smelting kiln, the zinc liquid of producing is drained into rapidly among the Chu Xinchi, can employ the zinc gray sealing after zinc liquid is discharged certainly by the zinc gray in the extruding liquid outlet, very convenient.The employing that smelting kiln of the present invention is more good heat conductivity, the carbofrax material that can reclaim make, production cost is lower.Smelting kiln requires low to crude zinc oxide materials, not fastidious, raw material does not need to carry out preprocessing to be handled, directly charging, batch specification of quality to raw material is lower, can carry out continuous mass production, the both available coal of reductive agent, also available hydrogen, methane etc. are fit to the smelting to regeneration zinc gray raw material very much.Can in slag, obtain enriching and recovering if contain other metals in the material; If contain ferric oxide, then in smelting process, be reduced, waste residue can directly obtain sponge iron through magnetic separation.Therefore, compared with prior art, it is little that the present invention has floor space, and output is big, the heat utilization efficiency height, rate of recovery height, production cost is low, and is pollution-free, can handle the characteristics of various regeneration zinc gray raw materials, meet the requirement of environmental protection, energy-conservation, recycling economy, both be fit to crude zinc and smelted, also be fit to other similar non-ferrous metal metallurgies.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 is the C-C sectional view of Fig. 1.
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Embodiment
Embodiment 1.As shown in Figure 1, crude zinc is smelted kiln.Comprise kiln body 1, on kiln body 1, be provided with opening for feed 2, air outlet 3, liquid outlet 4 and slag notch 5, in liquid outlet 4, be filled with zinc gray 14, storage zinc pond 6 is arranged below liquid outlet 4; Zinc gray 14 is used for liquid outlet 4 is sealed, and the zinc liquid of producing reaches a certain amount of back and drains into automatically in the storage zinc pond 6 by the zinc gray 14 in the extruding liquid outlet 4 in the rotary course of kiln body 1, and zinc liquid is discharged back zinc gray 14 automatically with liquid outlet 4 sealings.Be provided with preheating section 7, pyrotic smelting section 8 and condenser 9 in kiln body 1, in pyrotic smelting section 8 Graphite Electrodes 10 be housed, Graphite Electrodes 10 connects rotary transformer 15, adopts rotating transformer 15 to introduce electric current also by Graphite Electrodes 10 energising heating.In Graphite Electrodes 10 the insides silicon carbide heat-conducting layer 12 is arranged, silicon carbide heat-conducting layer 12 is used to protect Graphite Electrodes 10 and plays heat transfer effect.Condenser 9 has 8 big condensing chambers and narrow passage, utilizes the rotation of kiln body 1 in smelting process, make the zinc fume of generation be inhaled into behind the condensing chamber in narrow passage with condenser 9 in the collision of zinc liquid two-phase mutual extrusion, reach splendid condensation effect.Between preheating section 7 and pyrotic smelting section 8, be provided with defeated material rotating cylinder 13, at defeated material rotating cylinder 13 front ends material lifting gear 16 is arranged, like this material earlier than the preheating section 7 of large space in the continuous rotation by kiln body 1 stir fully, slough fully behind the moisture again by defeated and expect that rotating cylinder 13 delivers to pyrotic smelting section 8 and heat.Kiln body 1 inwall and defeated material rotating cylinder 13 all adopt the silicon carbide system of building to form.Kiln body 1 adopts the form of rotation, in the bottom of kiln body 1 transmission mechanism 11 is arranged, and drives kiln body 1 average rate constantly rotation slowly in smelting process by transmission mechanism 11.Opening for feed 2 and air outlet 3 are positioned at preheating section 7 one sides of kiln body 1 and keep apart mutually, and air outlet 3 is positioned at the outside of opening for feed 2, like this can be with material and the operation of waste gas shunting.During making, also using fixedly with inner sleeve of silicon carbide making (promptly defeated material rotating cylinder 13), the silicon carbide knee wall of inner sleeve is separated into 8 condensing chambers (as shown in Figure 3) with the limit upper channel.Material is walked in intermediary silicon carbide sleeve (defeated material rotating cylinder 13), and zinc fume is walked in the upper channel of limit, realizes being separated from each other of solid phase and gas phase.Slag notch 5 is positioned at pyrotic smelting section 8 one sides of kiln body 1, and waste residue adopts a spiral deslagging device sealing to extract slag notch 5 out.
Crude zinc smelting process of the present invention, it adopts pyrometallurgical smelting process to smelt, and smelts step and comprises charging, preheating, pyrotic smelting and condensation; In smelting kiln, be provided with preheating section, pyrotic smelting section and condenser, at first, material with screw feeder by the opening for feed 3 of the smelting kiln smelting kiln of evenly packing into, material is by the preheating of the heat radiation of the waste heat of waste gas and condensing chamber institute, slough moisture, send the defeated material of kiln body intermediary rotating cylinder 13 to after being promoted by the material lifting gear 16 of defeated material rotating cylinder 13 front ends again.Material moves ahead on one side, Yi Bian the heat radiation institute preheating of the chamber of continuing to be condensed, during to the tail end of defeated material rotating cylinder 13, expectation can be preheating to 900 ℃.Then, material enters pyrotic smelting section 8, and the high temperature that Graphite Electrodes 10 produces is passed to material by silicon carbide heat-conducting layer 12, and material progressively is heated to 1200 ℃, makes material fully reduce evaporation.Zinc fume rises to the top that smelts kiln then, the negative pressure of chamber of being condensed is aspirated, when condensing chamber is descending, the import of condensing chamber is dropped down the zinc fluid-tight of coming in and is closed under the condensing chamber of top, increase along with zinc liquid, the steam of condensing chamber is compressed to be extruded, and with the zinc liquid of coming in head-on collision, mutual extrusion in the narrow passage of condenser, thereby makes zinc fume obtain condensation preferably.Condensed waste gas rises to enter and smelts preheating section of kiln 7; In the rotary course of smelting kiln, when condensing chamber was displaced downwardly to the bottom, zinc hydrorrhea more than needed went out condensing chamber, enters liquid outlet 4.When condensing chamber rises from the bottom,, drop down under the zinc liquid that when condensing chamber rotates to the middle and upper part, exports previously with going up the zinc liquid of expiring the chamber, make condensing chamber produce negative pressure space, condensing chamber back import inspiration simultaneously zinc fume, 8 condensing chamber rotations back and forth reach the purpose of condensation zinc fume.Along with the liquid level of zinc liquid in liquid outlet 4 constantly increases, the zinc gray 14 of filling in the liquid outlet 4 is produced pressure, and press off the zinc gray 14 of liquid outlet 4, drop down down to storage zinc pond 6.Liquid outlet 4 can be sealed by the zinc gray above the storage zinc pond 6 again when rising automatically, and 8 liquid outlet 4 rotations back and forth reach the purpose that seals out zinc.Waste residue is displaced downwardly to the kiln tail, is arranged on the spiral deslagging device of smelting the kiln afterbody and at the uniform velocity extracts slag notch 5 out.Small amount of exhaust gas is discharged kiln body 1 after preheating section 7 further dispels the heat, behind bag-type dust, the remaining CO (carbon monoxide converter) gas that is mainly can be used as fuel.
Embodiments of the present invention are not limited to the foregoing description, and the various variations of making under the prerequisite that does not break away from aim of the present invention all belong within protection scope of the present invention.
Claims (10)
1. crude zinc smelting process, its adopts pyrometallurgical smelting process to smelt, and it is characterized in that: smelt step and comprise charging, preheating, pyrotic smelting and condensation; In smelting kiln, be provided with preheating section, pyrotic smelting section and condenser; Raw material enters the heating of pyrotic smelting section by the opening for feed of the smelting kiln smelting kiln of packing into after the preheating section preheating, the zinc fume of generation enters condenser condenses; Condensed waste gas enters preheating section raw material is carried out preheating, and discharges outside the smelting kiln waste gas bag-type dust by being located at the air outlet that smelts on the kiln; The zinc liquid that condensation produces drains among the Chu Xinchi by being located at the liquid outlet of smelting on the kiln, and waste residue is discharged outside the smelting kiln by being located at the spiral deslagging device of smelting the kiln afterbody.
2. crude zinc smelting process according to claim 1 is characterized in that: described smelting kiln adopts the rotation form, smelts kiln average rate constantly rotation slowly in smelting process.
3. crude zinc smelting process according to claim 1 is characterized in that: described zinc fume is condensed after the negative pressure of chamber sucks condenser, in narrow passage with on the mutual extrusion and collision condensation of zinc liquid phase of irritating under the condensing chamber
4. crude zinc smelting process according to claim 1 is characterized in that: described pyrotic smelting section is to adopt rotating transformer to introduce electric current, and by Graphite Electrodes energising heating.
5. crude zinc smelting process according to claim 1, it is characterized in that: when described zinc liquid comes downwards to the bottom at condensing chamber, zinc hydrorrhea more than needed goes out condensing chamber, enters liquid outlet, and increases pressure that the back produces by zinc liquid liquid level and wash the zinc gray of filling in the liquid outlet open and drain among the Chu Xinchi automatically.
6. crude zinc smelting process according to claim 1 is characterized in that: described raw material and zinc fume are to reach being separated from each other of solid phase and gas phase by kiln body intermediary defeated material rotating cylinder and condenser.
7. a crude zinc is smelted kiln, comprises kiln body (1), it is characterized in that: be provided with opening for feed (2), air outlet (3), liquid outlet (4) and slag notch (5) on described kiln body (1), be filled with zinc gray (14) in liquid outlet (4); In the below of liquid outlet (4) Chu Xinchi (6) is arranged; Be provided with preheating section (7), pyrotic smelting section (8) and condenser (9) in kiln body (1), in pyrotic smelting section (8) Graphite Electrodes (10) be housed, Graphite Electrodes (10) connects rotary transformer (15); In the bottom of kiln body (1) transmission mechanism (11) is arranged.
8. crude zinc according to claim 7 is smelted kiln, and it is characterized in that: described opening for feed (2) and air outlet (3) are positioned at preheating section (7) one sides of kiln body (1) and keep apart mutually, and air outlet (3) are positioned at the outside of opening for feed (2); Slag notch (5) is positioned at pyrotic smelting section (8) one sides of kiln body (1).
9. crude zinc according to claim 7 is smelted kiln, it is characterized in that: in described Graphite Electrodes (10) the inside silicon carbide heat-conducting layer (12) is arranged.
10. crude zinc according to claim 7 is smelted kiln, it is characterized in that: be provided with defeated material rotating cylinder (13) between described preheating section (7) and pyrotic smelting section (8), at defeated material rotating cylinder (13) front end material lifting gear (16) arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103079264A CN101665879B (en) | 2009-09-29 | 2009-09-29 | Crude zinc smelting method and smelting kiln used thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103079264A CN101665879B (en) | 2009-09-29 | 2009-09-29 | Crude zinc smelting method and smelting kiln used thereby |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101665879A true CN101665879A (en) | 2010-03-10 |
| CN101665879B CN101665879B (en) | 2011-04-20 |
Family
ID=41802654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103079264A Expired - Fee Related CN101665879B (en) | 2009-09-29 | 2009-09-29 | Crude zinc smelting method and smelting kiln used thereby |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101665879B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000829A (en) * | 2010-10-25 | 2011-04-06 | 云南天浩稀贵金属股份有限公司 | Method for smelting metal zinc powder from zinc calcine by using electric furnace |
| CN103526045A (en) * | 2013-10-30 | 2014-01-22 | 岳阳钟鼎热工电磁科技有限公司 | Continuous-recovery pusher kiln for regenerated zinc |
| CN105060335A (en) * | 2015-08-26 | 2015-11-18 | 高邑县永昌锌业有限责任公司 | Method for efficiently producing zinc oxide at low energy consumption |
| CN113509829A (en) * | 2021-03-04 | 2021-10-19 | 童怀彪 | Copper smelting flue gas purification equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1814832A (en) * | 2006-02-24 | 2006-08-09 | 熊秦 | Vacuum-smelting zinc-oxide ore production technology |
| CN100370043C (en) * | 2006-05-10 | 2008-02-20 | 徐建成 | Crude zinc smelting method and smelting furnace therefor |
| CN200964431Y (en) * | 2006-09-20 | 2007-10-24 | 徐建成 | Crude zinc smelting furnace |
| CN201497341U (en) * | 2009-09-29 | 2010-06-02 | 徐建成 | Spelter smelting kiln |
-
2009
- 2009-09-29 CN CN2009103079264A patent/CN101665879B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000829A (en) * | 2010-10-25 | 2011-04-06 | 云南天浩稀贵金属股份有限公司 | Method for smelting metal zinc powder from zinc calcine by using electric furnace |
| CN102000829B (en) * | 2010-10-25 | 2012-06-06 | 云南天浩稀贵金属股份有限公司 | Method for smelting metal zinc powder from zinc calcine by using electric furnace |
| CN103526045A (en) * | 2013-10-30 | 2014-01-22 | 岳阳钟鼎热工电磁科技有限公司 | Continuous-recovery pusher kiln for regenerated zinc |
| CN105060335A (en) * | 2015-08-26 | 2015-11-18 | 高邑县永昌锌业有限责任公司 | Method for efficiently producing zinc oxide at low energy consumption |
| CN113509829A (en) * | 2021-03-04 | 2021-10-19 | 童怀彪 | Copper smelting flue gas purification equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101665879B (en) | 2011-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100469907C (en) | Method for processing dust with zinc of electric furnace | |
| WO2018001265A1 (en) | Molten carbon thermal process magnesium preparation technique and magnesium refining system | |
| CN104674016B (en) | Method and device for condensing magnesium vapor generated by evaporation and heat absorption of magnesium liquid and coproducing refined magnesium | |
| WO2018000587A1 (en) | Vacuum induction furnace, electric arc furnace vacuum magnesium refining system and magnesium refining method thereof | |
| CN102181663B (en) | Method for producing zinc powder by treating zinc-containing miscellaneous material through electric furnace | |
| CN101665879B (en) | Crude zinc smelting method and smelting kiln used thereby | |
| CN105567897A (en) | Iron making method and kiln | |
| CN106756096A (en) | A kind of method of the waste gas recovery zinc powder that utilization electric furnace zinc smelting is produced | |
| CN201497341U (en) | Spelter smelting kiln | |
| CN107326128A (en) | A kind of ion dust mud contaning rotary hearth furnace handling process | |
| CN113483339B (en) | Continuous electric heating furnace and method for recycling aluminum electrolysis carbon electrode waste | |
| CN1644720A (en) | Oxygen-enriched zinc smelting method | |
| CN102353250B (en) | Zinc-cadmium electric heating smelting rotary kiln | |
| CN102382992A (en) | Method for treating high-antimony low-silver-tin anode slime | |
| CN114317964A (en) | Process and device for reducing zinc-containing material by vacuum low-temperature aluminothermic process | |
| CN201043182Y (en) | Electrical heated equipment for direct reduction of sponge iron | |
| CN102146522B (en) | Second-generation crude zinc smelting kiln | |
| CN219014949U (en) | Metal smelting device | |
| CN207130313U (en) | A kind of system for handling utilising zinc containing waste residue | |
| CN207402110U (en) | A kind of plating cadmia melting continuously zinc powder furnace | |
| CN206680185U (en) | A kind of impure selenium slag wet feed vacuum smelting equipment | |
| CN113587653B (en) | Vacuum furnace for continuous production of silicon oxide powder scraping type and method for continuous production of silicon oxide | |
| CN205907324U (en) | System for handle zinc leaching residue | |
| CN101220412B (en) | Set technique for extracting cadmium from waste and old nickel-cadmium battery, and producing ferro-nickel alloy | |
| CN1153837C (en) | Process for smelting zinc |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20110420 Termination date: 20140929 |
|
| EXPY | Termination of patent right or utility model |