CN101767062A - Method for separating bauxite and sulfur-containing mineral from high-sulfur bauxite - Google Patents

Method for separating bauxite and sulfur-containing mineral from high-sulfur bauxite Download PDF

Info

Publication number
CN101767062A
CN101767062A CN 200810190801 CN200810190801A CN101767062A CN 101767062 A CN101767062 A CN 101767062A CN 200810190801 CN200810190801 CN 200810190801 CN 200810190801 A CN200810190801 A CN 200810190801A CN 101767062 A CN101767062 A CN 101767062A
Authority
CN
China
Prior art keywords
bauxite
sulfur
mineral
content
flotation
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
Application number
CN 200810190801
Other languages
Chinese (zh)
Other versions
CN101767062B (en
Inventor
赵恒勤
胡四春
马化龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS
Original Assignee
Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS filed Critical Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS
Priority to CN2008101908013A priority Critical patent/CN101767062B/en
Publication of CN101767062A publication Critical patent/CN101767062A/en
Application granted granted Critical
Publication of CN101767062B publication Critical patent/CN101767062B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Manufacture And Refinement Of Metals (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The invention discloses a method for separating bauxite and sulfur-containing minerals from high-sulfur bauxite, which comprises the following steps: the high-sulfur bauxite is finely ground, floated, and concentrated by flotation, so that qualified bauxite with low sulfur content and qualified sulfur-containing mineral with high sulfur content can be obtained. Before bauxite is dissolved out, the method can well utilize the high-sulfur bauxite by adopting a simple and low-cost flotation process, can comprehensively utilize the bauxite and the sulfur-containing mineral in the bauxite, has high recovery rates of alumina and sulfur, and has the advantages of low cost, simple process, safety, environmental protection and the like.

Description

From high-sulfur bauxite, isolate bauxite and the method that contains sulfur mineral
Technical field
The present invention relates to a kind of separation method of mineral, relate in particular to a kind of method of from high-sulfur bauxite, isolating bauxite and containing sulfur mineral, belong to the screening and the separation technology field of mineral.
Background technology
China's high-sulfur bauxite is more than 1.5 hundred million tons, and the sulphur in the ore mainly exists with the troilite form, and the sulphur when the bauxite stripping in the pyrite is basically all with S 2+Form enters solution, is oxidized to SO gradually in cyclic process 4 2+, and accumulation gradually, alumina producing is produced greatly harm, so aluminium oxide requires the bauxite sulfur-bearing must not be higher than 0.7% with bauxite.Adopt both at home and abroad several different methods to remove the sulphur in the bauxite or allow sulphur enter to add the barium salt desulfurization in the solution again and obtain certain achievement, but all fail to obtain large-scale application aborning, cause the bigger high-sulfur bauxite resource of memory space to fail so far to obtain fine utilization industrial.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, proposed a kind of technical feasibility, economical rationality, can effectively eliminate sulphur in the ore to the adverse effect of alumina producing equipment and production technology and can fully utilize aluminium oxide wherein and contain the comprehensive utilization high-sulfur bauxite production method of alumina of sulfur mineral.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of method of isolating bauxite and contain sulfur mineral from high-sulfur bauxite may further comprise the steps:
With isolating bauxite and contain sulfur mineral by the flotation means behind the high-sulfur bauxite ore grinding, obtain bauxite respectively and contain sulfur mineral.
In the said method, the form that the aluminium oxide mineral in the described high-sulfur bauxite are preferably with diaspore and/or boehmite mineral exists;
Sulphur in the described high-sulfur bauxite mainly is present in the sulphide ore mineral, and wherein, these sulphide ore mineral are pyrite preferably.
Described aluminum-containing mineral be separate with the flotation tailing form and obtain (during flotation along with the mineral of bubble floating flotation concentrate, and not come-up just be flotation tailing); So-called flotation is froth flotation, is the difference according to the surface nature of various mineral, and the buoyancy by means of bubble from ore pulp selects the process of dividing mineral.General sulphide ore has good floatability, and the oxide ore floatability is generally relatively poor, because main sulfur mineral is a sulphide ore in the high-sulfur bauxite, other is bauxite and siliceous mineral, the sulphide ore floatability is good and bauxite and siliceous mineral floatability are poor, thereby reaches the purpose of FLOTATION SEPARATION.
Wherein, described ore grinding is preferably and high-sulfur bauxite is milled to particle diameter accounts for the 50%-90% of its gross weight less than the total amount of 200 purpose ores, and is preferred, high-sulfur bauxite is milled to particle diameter accounts for 65% of its gross weight less than the total amount of 200 purpose ores;
The inventor carries out flotation by further experiment discovery under following any described conditioned disjunction parameter, can not only improve the bauxite and the rate of recovery that contains sulfur mineral to greatest extent, can also reduce production costs and enhance productivity:
The pH value of flotation is preferably 5.7-6.3;
By weight percentage, the pulp density of flotation is preferably 20-45%;
The consumption of flotation collector is preferably 30-90 gram (g)/ton (t), more preferably 45 (g)/ton (t); Wherein, the flotation collector of being used always when described flotation collector can be mineral floating for example, can be a butyl xanthate.
The inventive method can also obtain FLOTATION SEPARATION contains sulfur mineral and carries out repeatedly (being preferably 2-4 time) selected making and contain the standard that the content of sulphur in the sulfur mineral reaches qualified troilite concentrate and obtain iron ore sulphur concentrate;
The sulphur overwhelming majority in China's high-sulfur bauxite exists with the troilite form, and sulfide can select suitable floatation process to carry out FLOTATION SEPARATION, so FLOTATION SEPARATION aluminium oxide and sulphur are a kind of good process for sulfur removal, also will become a kind of topmost high-sulfur bauxite desulfurization process.The inventive method adopts simply the floatation process that expense is cheap before the bauxite stripping, high-sulfur bauxite is well utilized, can fully utilize bauxite wherein and contain sulfur mineral, the rate of recovery height of aluminium oxide and sulphur, it is low to have cost, and technology is simple and direct, advantages of environment protection.
Description of drawings
The industrial flow schematic diagram of Fig. 1 the inventive method.
The specific embodiment
Further describe the present invention below in conjunction with specific embodiment, advantage of the present invention and characteristics will be more clear along with description.But these embodiment only are exemplary, scope of the present invention are not constituted any restriction.It will be understood by those skilled in the art that and down can make amendment or replace without departing from the spirit and scope of the present invention, but these modifications and replacing all fall within the scope of protection of the present invention the details of technical solution of the present invention and form.
Embodiment 1
Certain economizes high-sulfur bauxite, its Al China 2O 3Content is 59.67%, SiO 2Content is 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35%; Being particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 65% of its gross weight less than the total amount of 200 purpose ores; Be 32% at pH=6.1, pulp density, floating agent (butyl xanthate) consumption is under the condition of 45g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 62.06%, S content 0.28%, alumina recovery rate 94.86%, simultaneously through the selected S content 38.56% that obtains, the qualified sulphur concentrate of sulfur recovery rate 72.86%.
Embodiment 2
Certain economizes certain high-sulfur bauxite, Al China 2O 3Content 56.32%, SiO 2Content 8.21%, A/S=6.86, S content 1.30%; Being particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 75% of its gross weight less than the total amount of 200 purpose ores; Be 29% at pH=5.8, pulp density, floating agent (butyl xanthate) consumption is under the condition of 53g/t ore deposit, FLOTATION SEPARATION bauxite, flotation concentrate obtain bauxite Al again through triple cleaning 2O 3Content 59.53%, S content 0.26%, alumina recovery rate 95.32%; Simultaneously through the selected S content 37.42% that obtains, the qualified sulphur concentrate of sulfur recovery rate 70.36%.
Embodiment 3
Certain economizes certain high-sulfur bauxite, Al China 2O 3Content 62.78%, SiO 2Content 11.07%, A/S=5.67, Fe 2O 3Content 7.51%, S content 1.43%; Being particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 63% of its gross weight less than the total amount of 200 purpose ores; Be 37% at pH=6.3, pulp density, floating agent (butyl xanthate) consumption is under the condition of 58g/t ore deposit, FLOTATION SEPARATION bauxite, flotation concentrate obtain bauxite Al again through recleaning 2O 3Content 63.65%, S content 0.30%, alumina recovery rate 96.21%; Simultaneously through the selected S content 39.18% that obtains, the qualified sulphur concentrate of sulfur recovery rate 73.13%.
Embodiment 4
Certain economizes high-sulfur bauxite, Al China 2O 3Content 59.67%, SiO 2Content 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35% is particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 80% of its gross weight less than the total amount of 200 purpose ores; Be 32% at pH=6, pulp density, floating agent (butyl xanthate) consumption is under the condition of 45g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 61.92%, S content 0.27%, alumina recovery rate 95.78%, simultaneously through the selected S content 38.85% that obtains, the qualified sulphur concentrate of sulfur recovery rate 73.25%, all be more or less the same with embodiment 1 more every index, but because the more little required energy consumption of mog is high more, to account for 65% of its gross weight less than the total amount of 200 purpose ores be best mog so this ore deposit mog is a particle diameter.
Embodiment 5
Certain economizes high-sulfur bauxite, Al China 2O 3Content 59.67%, SiO 2Content 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35%; Being particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 65% of its gross weight less than the total amount of 200 purpose ores; Be 32% at pH=6, pulp density, floating agent (butyl xanthate) consumption is under the condition of 65g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 62.23%, S content 0.27%, alumina recovery rate 95.31%, through the selected S content 39.14% that obtains, the qualified sulphur concentrate of sulfur recovery rate 73.42% all is more or less the same with embodiment 1 more every index simultaneously, but because the floating agent consumption increases, not only increasing beneficiation cost and environmental pollution, also can increase the possibility that unnecessary flotation agent pollutes bauxite, is that 45g/t is advisable so the floating agent consumption is selected in this ore deposit for use.
The comparative example 1
Certain economizes high-sulfur bauxite, Al China 2O 3Content 59.67%, SiO 2Content 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35%; Being particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 65% of its gross weight less than the total amount of 200 purpose ores; Be 32% at pH=4, pulp density, floating agent (butyl xanthate) consumption is under the condition of 45g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 61.26%, S content are 0.52%, alumina recovery rate 92.12%; Through the selected S content 29.75% that obtains, sulfur recovery rate has only 56.78% sulphur concentrate.
The comparative example 2
Certain economizes certain high-sulfur bauxite, Al China 2O 3Content 56.32%, SiO 2Content 8.21%, A/S=6.86, S content 1.30%; This high-sulfur bauxite is accounted for 45% of its gross weight through ore grinding to fineness for the total amount less than the particle diameter of 200 purpose ores; Be 29% at pH=5.8, pulp density, floating agent (butyl xanthate) consumption is under the condition of 53g/t ore deposit, FLOTATION SEPARATION bauxite, flotation concentrate obtain bauxite Al again through triple cleaning 2O 3Content 59.25%, S content 0.44%, alumina recovery rate 93.16%; Simultaneously through the selected S content 29.18% that obtains, the qualified sulphur concentrate of sulfur recovery rate 61.36%.
The comparative example 3
Certain economizes high-sulfur bauxite, Al China 2O 3Content 59.67%, SiO 2Content 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35%; Being particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 40% of its gross weight less than the total amount of 200 purpose ores; Be 32% at pH=6, pulp density, floating agent (butyl xanthate) consumption is under the condition of 45g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 61.26%, S content reaches 0.47%, alumina recovery rate 92.78%; Through the selected S content 28.32% that obtains, sulfur recovery rate has only 60.29% sulphur concentrate.
The comparative example 4
Certain economizes high-sulfur bauxite, Al China 2O 3Content 59.67%, SiO 2Content 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35% is particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 95% of its gross weight less than the total amount of 200 purpose ores; Be 32% at pH=6, pulp density, floating agent (butyl xanthate) consumption is under the condition of 45g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 61.95%, S content 0.26%, alumina recovery rate 95.83%, simultaneously through the selected S content 38.89% that obtains, the qualified sulphur concentrate of sulfur recovery rate 73.78%, all be more or less the same with embodiment 1 and embodiment 4 more every indexs, but because the more little required energy consumption of mog is high more, and in the aluminium mineral product in the content of sulphur and the sulphur concentrate product content of sulphur all finished and reached requirement, so this ore deposit mog should not be too thin, particle diameter accounts for 65% of its gross weight less than the total amount of 200 purpose ores and is best mog.
The comparative example 5
Certain economizes high-sulfur bauxite, Al China 2O 3Content 59.67%, SiO 2Content 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35%; Being particle diameter with this high-sulfur bauxite through ore grinding to fineness accounts for 65% of its gross weight less than the total amount of 200 purpose ores; Be 32% at pH=6, pulp density, floating agent (butyl xanthate) consumption is under the condition of 25g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 60.21%, S content 0.42%, alumina recovery rate 92.26%; Through the selected S content 31.68% that obtains, the sulphur concentrate of sulfur recovery rate 64.89%.
The comparative example 6
Certain economizes high-sulfur bauxite, Al China 2O 3Content 59.67%, SiO 2Content 13.73%, A/S=4.35, Fe 2O 3Content 7.20%, S content 1.35%; This high-sulfur bauxite is accounted for 65% of its gross weight through ore grinding to the total amount less than the particle diameter of 200 purpose ores; Be 32% at pH=6, pulp density, floating agent (butyl xanthate) consumption is under the condition of 110g/t ore deposit, adopts FLOTATION SEPARATION bauxite, flotation concentrate obtains bauxite Al again through triple cleaning 2O 3Content 62.35%, S content 0.26%, alumina recovery rate 95.49%, simultaneously through the selected S content 39.23% that obtains, the qualified sulphur concentrate of sulfur recovery rate 73.63%, all be more or less the same with embodiment 1 and embodiment 5 more every indexs, and in the aluminium mineral product in the content of sulphur and the sulphur concentrate product content of sulphur all finished and reached requirement, but because the floating agent consumption increases, not only increase beneficiation cost and environmental pollution, also can increase the possibility that unnecessary flotation agent pollutes bauxite, be that 45g/t is advisable so the floating agent consumption is selected in this ore deposit for use.

Claims (10)

1. from high-sulfur bauxite, isolate bauxite and the method that contains sulfur mineral for one kind, may further comprise the steps:
To isolate bauxite and contain sulfur mineral by the flotation means behind the high-sulfur bauxite ore grinding, obtain bauxite respectively and contain sulfur mineral.
2. it is characterized in that in accordance with the method for claim 1: described ore grinding is that high-sulfur bauxite is milled to fineness is particle diameter accounts for its gross weight less than the total amount of 200 purpose ores 50%-90%.
3. it is characterized in that in accordance with the method for claim 2: described ore grinding is that to be milled to fineness be particle diameter accounts for 65% of its gross weight less than the total amount of 200 purpose ores with high-sulfur bauxite.
4. it is characterized in that in accordance with the method for claim 1: described flotation is carried out under the condition of 5.7-6.3 in the pH value.
5. in accordance with the method for claim 1, it is characterized in that: by weight percentage, described flotation is to carry out under pulp density is the condition of 20-45%.
6. it is characterized in that in accordance with the method for claim 1: the consumption of the used collecting agent of described flotation is a 30-90 gram/ton.
7. it is characterized in that in accordance with the method for claim 6: the consumption of the used collecting agent of described flotation is 45 gram/tons; Described collecting agent is a butyl xanthate.
8. it is characterized in that in accordance with the method for claim 1: the aluminium oxide mineral in the described high-sulfur bauxite exist with the form of diaspore and/or boehmite mineral; Sulphur in the described high-sulfur bauxite mainly is present in the sulphide ore mineral, and wherein, these sulphide ore mineral are pyrite.
9. it is characterized in that in accordance with the method for claim 1: described aluminum-containing mineral is to separate with the flotation tailing form to obtain.
10. it is characterized in that in accordance with the method for claim 1: the sulfur mineral that contains that FLOTATION SEPARATION is obtained carries out the selected iron ore sulphur concentrate that obtains 2-4 time.
CN2008101908013A 2008-12-30 2008-12-30 Method for separating bauxite and sulfur-containing mineral from high-sulfur bauxite Expired - Fee Related CN101767062B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008101908013A CN101767062B (en) 2008-12-30 2008-12-30 Method for separating bauxite and sulfur-containing mineral from high-sulfur bauxite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008101908013A CN101767062B (en) 2008-12-30 2008-12-30 Method for separating bauxite and sulfur-containing mineral from high-sulfur bauxite

Publications (2)

Publication Number Publication Date
CN101767062A true CN101767062A (en) 2010-07-07
CN101767062B CN101767062B (en) 2013-05-01

Family

ID=42500252

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2008101908013A Expired - Fee Related CN101767062B (en) 2008-12-30 2008-12-30 Method for separating bauxite and sulfur-containing mineral from high-sulfur bauxite

Country Status (1)

Country Link
CN (1) CN101767062B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515216A (en) * 2011-11-16 2012-06-27 何明德 Technology for producing alumina and simultaneously recovering iron and aluminum by using high-iron bauxite
CN103128003A (en) * 2011-12-05 2013-06-05 沈阳铝镁设计研究院有限公司 High-sulfur bauxite comprehensive utilization method
CN103170410A (en) * 2013-03-12 2013-06-26 广西冶金研究院 Flotation method for reducing sulfur in bauxite concentrate
CN105562212A (en) * 2015-03-18 2016-05-11 遵义能矿投资股份有限公司 Method for desilication and desulfuration of sulfur-containing bauxite by floating
CN110976287A (en) * 2019-12-18 2020-04-10 福建三钢闽光股份有限公司 Method for recycling carbon, iron and nonferrous metals from micro-fine metallurgical dust

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515216A (en) * 2011-11-16 2012-06-27 何明德 Technology for producing alumina and simultaneously recovering iron and aluminum by using high-iron bauxite
CN102515216B (en) * 2011-11-16 2014-09-03 何明德 Technology for producing alumina and simultaneously recovering iron and aluminum by using high-iron bauxite
CN103128003A (en) * 2011-12-05 2013-06-05 沈阳铝镁设计研究院有限公司 High-sulfur bauxite comprehensive utilization method
CN103170410A (en) * 2013-03-12 2013-06-26 广西冶金研究院 Flotation method for reducing sulfur in bauxite concentrate
CN103170410B (en) * 2013-03-12 2014-11-26 广西冶金研究院 Flotation method for reducing sulfur in bauxite concentrate
CN105562212A (en) * 2015-03-18 2016-05-11 遵义能矿投资股份有限公司 Method for desilication and desulfuration of sulfur-containing bauxite by floating
CN110976287A (en) * 2019-12-18 2020-04-10 福建三钢闽光股份有限公司 Method for recycling carbon, iron and nonferrous metals from micro-fine metallurgical dust
CN110976287B (en) * 2019-12-18 2021-08-13 福建三钢闽光股份有限公司 Method for recycling carbon, iron and nonferrous metals from micro-fine metallurgical dust

Also Published As

Publication number Publication date
CN101767062B (en) 2013-05-01

Similar Documents

Publication Publication Date Title
CN101905190B (en) Collophanite beneficiation method
CN101985111B (en) Copper-sulfur ore separation method
CN103551245B (en) Complex multi-metal micro fine particle sulphide ore is carried out to the beneficiation method of synthetical recovery
CN110170381B (en) Beneficiation method for recovering cassiterite from tin-copper paragenic ore
CN105289834B (en) The zinc sulphur separation beneficiation method of zinc sulphide ore rich in magnetic iron ore
CN102553717B (en) Beneficiation process for high-sulfur hematite
CN102218377B (en) Efficient copper-cobalt oxide ore combination collecting agent and copper oxide ore beneficiation method
CN103990547B (en) A kind of complicated difficult dressing zinc oxide ore ore-dressing technique
CN104128246B (en) Beneficiation method for copper-zinc sulfide ore containing easy-to-float gangue
CN101767062B (en) Method for separating bauxite and sulfur-containing mineral from high-sulfur bauxite
CN101579653A (en) Benefication method for concentrating fine tungsten ore in tailings by warming scheelite
CN103495493A (en) Beneficiation method for low-grade fine tin ore
CN104069937A (en) Ore dressing method for removing pyrrhotite from iron ore
CN102284372B (en) Flotation method for carbonate minerals
CN104511373A (en) Mineral separation method for high-oxidative molybdenum ore
CN103143447A (en) Beneficiation method of high-oxygenation-efficiency complicated copper ore containing co-associated metal
CN104138807A (en) Beneficiation method for copper-nickel sulfide ore containing layered easy-to-float silicate gangue
CN112024110A (en) Mineral separation method for pegmatite type spodumene
CN103447155A (en) Ore dressing method for blue chalcocite and pyrite and collecting agent used in ore dressing method
CN101767056B (en) Method for mixed selection and re-purification of cassiterite and sulfide ores
CN105880032A (en) Middle-low grade collophanite heavy floating combined sorting method
CN103878069B (en) Molybdenite separation method
CN103008113B (en) Copper sulfide mineral and talc flotation separation method
CN111298978B (en) Method for flotation of lepidolite without desliming
CN111871618B (en) Method for removing titanium minerals in high-sulfur bauxite

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: 20130501

Termination date: 20151230

EXPY Termination of patent right or utility model