CN101269352B - Beneficiation method for black and white tungsten fine deposit - Google Patents
Beneficiation method for black and white tungsten fine deposit Download PDFInfo
- Publication number
- CN101269352B CN101269352B CN2008100278736A CN200810027873A CN101269352B CN 101269352 B CN101269352 B CN 101269352B CN 2008100278736 A CN2008100278736 A CN 2008100278736A CN 200810027873 A CN200810027873 A CN 200810027873A CN 101269352 B CN101269352 B CN 101269352B
- Authority
- CN
- China
- Prior art keywords
- black
- white tungsten
- flotation
- concentrate
- white
- 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
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an ore dressing method for black-and-white tungsten fine deposit. The method is characterized in that: (1) gravity concentrate and gravity tailings are obtained by gravity desliming; (2) sulphide concentrate and sulphide ore flotation tailing are obtained by sulphide flotation; (3) the mixed flotation of black-and-white tungsten is performed, the sulphide ore flotation tailing is added with a regulator such as sodium carbonate, sodium silicate, aluminum sulfate, and lead nitrate, and is also added with a collector such as sulfating nascent soap; black-and-white tungsten mixed flotation concentrate and black-and-white mixed flotation tailing are obtained after one-time rough flotation, two or three times of fine flotation and two or three times of scavenging. The method provided by the invention is characterized in that the recovery process of the black-and-white tungsten fine deposit is simple, the flotation process of mixed black-and-white tungsten is stable,the recovery rate of tungsten is high and the cost of the dose is low. The method is suitable for the black-and-white tungsten fine deposit of which the content WO3 ranges from 0.10 to 0.50 percent, the WO3 is less than 30 micrometers and metals account for no less than 60 percent.
Description
Technical field
The present invention is a kind of beneficiation method that from black and white tungsten fine mud, reclaims the black and white tungsten mineral.
Background technology
China's tungsten resource is abundant, and reserves and output all account for first place, the world, influences the recovery that key that each tungsten selects factory's tungsten overall recovery is tungsten slurry at present.The tungsten slurry of China has characteristics such as productive rate is big, tenor is high, fine size, generally account for out grand raw ore amount 10～15%, WO
3Content 0.15～0.5%, WO
3Amount of metal accounts for out the grand total WO of raw ore
315～20%, in the thin mud less than the WO of 74 microns grades
3The metal occupation rate is 85～99%, less than the WO of 30 microns grades
3The metal occupation rate surpasses 60%, and less than 30 microns grade gravity separation inferior separating effect.According to statistics, the current rate of recovery of factory's black and white tungsten fine mud of selecting is merely 20～30%, grade 15～30%, and the sorting index that therefore improves black and white tungsten fine mud is the key that improves tungsten ore dressing overall recovery.
The beneficiation method of black and white tungsten fine mud has at present: classification-gravity treatment-flotation-magnetic method and full float glass process.
Classification-gravity treatment-flotation-magnetic method is after black and white tungsten fine mud is adopted two sections cyclone classifications; Roughly select enrichment greater than 30 microns grades with thin mud cutting shaking table; Table concentrate carries out floatation desulphurization and gets tungsten concentrate through table concentration again; Adopt centrifuges to roughly select less than 30 microns grades, the runout belt chute is selected, behind the floatation desulphurization again magnetic separation get low tungsten concentrate.The shortcoming of this method is that the tungsten ore product wolframite thing of being unrealized separates with scheelite mineral, has wolframite thing and scheelite mineral in the low tungsten product simultaneously.Not only flow process is complicated, device category is many and accuracy requires height for this method, and commercial production adaptability is relatively poor, and the recovering effect of black and white tungsten fine mud is relatively poor.
Full float glass process is with black and white tungsten fine mud direct flotation, remove sulfide mineral after, carry out the bulk flotation of black and white tungsten, black and white tungsten bulk flotation concentrate through Peter Luo Fufa selected separate white tungsten fine ore and wolframite.This method flow is simple; But because the tungsten metal occupation rate less than 30 microns grades surpasses 60% in the black and white tungsten fine mud; Mica, calcite, fluorite, kaolinic mineral content are up to 30～45% in the black and white tungsten fine mud; And the floatability of these mineral is better, causes that black and white tungsten bulk flotation chats internal circulating load is big, black and white tungsten bulk flotation concentrate grade is low, and the selected fractional dose of black and white tungsten bulk flotation concentrate is big, dosing is big.
Chinese patent numbers 200410051961.1 discloses a kind of beneficiation method of black and white tungsten mineral, and this method is to contain WO usually
30.2%～2.0%, black and white tungsten ratio is behind 1: 9～9: 1 the crushing raw ore ore grinding; After low intensity magnetic separation removes iron mineral and sulfide flotation and removes sulfide mineral; In its mine tailing, add a certain amount of benzene first hydroximic acid and sulphation oleic acid soap or tal fibre soap and make collecting agent; Waterglass and aluminum sulfate are combined modifier, carry out the bulk flotation of black and white tungsten, and black and white tungsten bulk flotation concentrate carries out ore pulp and heats and obtain white tungsten fine ore after selected; The cleaner tailings of heating obtains wolframite and tungsten slurry concentrate respectively through table concentration and tungsten slurry flotation operation, and this method abbreviates the GY method as.When using this method and carrying out the bulk flotation of black and white tungsten, black and white tungsten bulk flotation concentrate WO
3Content is close, but the rate of recovery is lower.
Summary of the invention
The objective of the invention is to propose a kind of to black and white tungsten fine mud good separation effect, black and white tungsten bulk flotation concentrate grade is high, the rate of recovery is high, reagent cost is low beneficiation method.
Beneficiation method of the present invention is made up of following steps according to this: 1) gravity treatment desliming: black and white tungsten fine mud through roughly select, selected, scan to sort and obtain gravity concentrate and gravity tailings; 2) sulfide flotation: gravity concentrate is concentrated to 30～45% concentration, and sulfide flotation obtains sulphur concentrate and sulfide flotation mine tailing; 3) black and white tungsten bulk flotation: to the ore deposit, in the sulfide flotation mine tailing, add adjustment agent sodium carbonate 100～500 grams, waterglass 500～5000 grams, aluminum sulfate 100～2000 grams, plumbi nitras 50～1000 grams by thin mud per ton, stirred 1～10 minute; Add collecting agent sulphation oleic acid soap 50～500 grams, stirred 1～10 minute; Roughly select through 1 time, 2～3 times selected, scans, obtain black and white tungsten bulk flotation concentrate and black and white tungsten bulk flotation mine tailing for 2～3 times.50～85% sulphation oleic acid soap is used to roughly select, and 15～50% are used to scan.
Characteristics of the present invention are: it is simple that black and white tungsten fine mud reclaims technological process, black and white tungsten bulk flotation process stabilization, and tungsten recovery rate is high, reagent cost is low, used beneficiation reagent environmentally safe, tailing water can reach emission request through the lime simple process.
Description of drawings
Fig. 1 is the beneficiation flowsheet figure of black and white tungsten fine mud of the present invention.
The specific embodiment
To contain WO
30.10～0.50%, molybdenum 0.013～0.50%, bismuth 0.03～0.60% is less than 30 microns grade WO
3The black and white tungsten fine mud of metal occupation rate>=60% carries out the gravity treatment desliming; The gravity treatment desliming is sorted for three sections by one roughing, primary cleaning, once purging selection to be formed; Centrifuge rough concentrate entering centrifuge is selected, and the centrifuge cleaner tailings returns centrifuge and roughly selects, and the centrifuge rougher tailings gets into shaking table and scans; The selected concentrate of shaking table scavenger concentrate and centrifuge is merged into gravity concentrate, its WO
3>=1.5%, the rate of recovery>=80%.Gravity concentrate is concentrated to 30～45% concentration through concentrator, gets into sulfide flotation, obtains sulphur concentrate and sulfide flotation mine tailing; To the ore deposit, in the sulfide flotation mine tailing, add adjustment agent sodium carbonate 100～500 grams, waterglass 500～5000 grams, aluminum sulfate 100～2000 grams, plumbi nitras 50～1000 grams by thin mud per ton, stir after 1～10 minute; Add collecting agent sulphation oleic acid soap 50～500 grams again; Stirred 1～10 minute, warp is roughly selected for 1 time, and 2～4 times selected; Scan, obtain WO for 2～3 times
38～20% black and white tungsten bulk flotation concentrate and black and white tungsten bulk flotation mine tailing.50～85% sulphation oleic acid soap is used to roughly select, and 15～50% are used to scan.Black and white tungsten bulk flotation concentrate is through the selected white tungsten fine ore that obtains of heating, and the cleaner tailings of heating obtains wolframite through table concentration.
Embodiment 1
Black and white tungsten fine mud contains WO
30.37%, less than 30 microns grade WO
3The metal occupation rate is 67%, and black and white tungsten ratio is 6: 4.Black and white tungsten fine mud is through the gravity separation method desliming, and the gravity concentrate that obtains carries out sulfide flotation be concentrated to 35% concentration through concentrator after.The regime of agent that the sulfide flotation mine tailing is pressed table 1 adds adjustment agent sodium carbonate, waterglass, aluminum sulfate, plumbi nitras, stirs 8 minutes, adds collecting agent sulphation oleic acid soap and stirs after 6 minutes; Carry out the bulk flotation of black and white tungsten, warp is roughly selected for 1 time, and 2 times selected; Scan for 2 times, obtain containing WO
38.29% black and white tungsten bulk flotation concentrate, the rate of recovery 75.58%.
Embodiment 2
Black and white tungsten fine mud contains WO
30.3%, less than 30 microns grade WO
3The metal occupation rate is 73%, and wherein black and white tungsten ratio is 6: 4, and black and white tungsten fine mud is through the gravity separation method desliming, and the gravity concentrate that obtains carries out sulfide flotation be concentrated to 33% concentration through concentrator after.The sulfide flotation mine tailing is pressed the regime of agent of table 1, adds adjustment agent sodium carbonate, waterglass, aluminum sulfate, plumbi nitras, stirs 6 minutes; Add collecting agent sulphation oleic acid soap and stir after 7 minutes, carry out the bulk flotation of black and white tungsten, roughly select through 1 time; 3 times selected, scans, obtain containing WO for 2 times
315.13% black and white tungsten bulk flotation concentrate, the rate of recovery 77.59%.
Embodiment 3
Black and white tungsten fine mud contains WO
30.21%, less than 30 microns grade WO
3The metal occupation rate is 81%, and black and white tungsten ratio is 5: 4, and black and white tungsten fine mud carries out sulfide flotation after using earlier gravity separation method desliming, the gravity concentrate that obtains to be concentrated to 30% concentration through concentrator.The sulfide flotation mine tailing is pressed the regime of agent of table 1, adds adjustment agent sodium carbonate, waterglass, aluminum sulfate, plumbi nitras, stirs 10 minutes, adds collecting agent sulphation oleic acid soap; Stir after 5 minutes, carry out the bulk flotation of black and white tungsten, roughly select through 1 time; Scan for 2 times, 2 times selected, obtains containing 10.63%WO
3Black and white tungsten bulk flotation concentrate, the rate of recovery 73.60%.
Visible by table 1, to containing 0.10～0.50%WO
3, less than 30 microns grade WO
3Metal occupation rate>=60%, 5: 4～6: 4 three different black and white tungsten fine mud sample ores of black and white tungsten ratio wherein adopt method of the present invention, obtain containing WO
38～20% black and white tungsten bulk flotation concentrate, the rate of recovery>=70%.
Black and white tungsten fine mud is through the gravity separation method desliming, and the gravity concentrate that obtains carries out sulfide flotation be concentrated to 30～33% concentration through concentrator after, with the GY method sulfide flotation mine tailing is carried out the bulk flotation of black and white tungsten, obtains containing WO
38～20% black and white tungsten bulk flotation concentrate, the rate of recovery 50～60%.Full float glass process is that black and white tungsten fine mud is directly carried out sulfide flotation, and the sulfide flotation mine tailing is pressed the regime of agent of table 1 embodiment 1, adds adjustment agent sodium carbonate, waterglass, aluminum sulfate, plumbi nitras; Stirred 10 minutes; Add collecting agent sulphation oleic acid soap, stir after 5 minutes, carry out the bulk flotation of black and white tungsten; Carry out the bulk flotation of black and white tungsten, the black and white tungsten bulk flotation concentrate that obtains contains WO approximately
32.73%, the rate of recovery has only 79.1%.
The present invention is applicable to WO
3Content 0.10～0.50%, less than the WO of 30 microns grades
3The black and white tungsten fine mud of metal occupation rate>=60%.
Claims (2)
1. the beneficiation method of a black and white tungsten fine mud is characterized in that being made up of following steps according to this: 1) gravity treatment desliming: black and white tungsten fine mud through roughly select, selected, scan to sort and obtain gravity concentrate and gravity tailings; 2) sulfide flotation: gravity concentrate is concentrated to 30～45% concentration, and sulfide flotation obtains sulphur concentrate and sulfide flotation mine tailing; 3) black and white tungsten bulk flotation: to the ore deposit, in the sulfide flotation mine tailing, add adjustment agent sodium carbonate 100～500 grams, waterglass 500～5000 grams, aluminum sulfate 100～2000 grams, plumbi nitras 50～1000 grams by thin mud per ton, stirred 1～10 minute; Add collecting agent sulphation oleic acid soap 50～500 grams, stirred 1～10 minute; Roughly select through 1 time, 2～3 times selected, scans, obtain black and white tungsten bulk flotation concentrate and black and white tungsten bulk flotation mine tailing for 2～3 times.
2. beneficiation method according to claim 1 is characterized in that 50～85% sulphation oleic acid soap is used to roughly select, and 15～50% are used to scan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100278736A CN101269352B (en) | 2008-05-05 | 2008-05-05 | Beneficiation method for black and white tungsten fine deposit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100278736A CN101269352B (en) | 2008-05-05 | 2008-05-05 | Beneficiation method for black and white tungsten fine deposit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101269352A CN101269352A (en) | 2008-09-24 |
| CN101269352B true CN101269352B (en) | 2012-05-30 |
Family
ID=40003734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100278736A Expired - Fee Related CN101269352B (en) | 2008-05-05 | 2008-05-05 | Beneficiation method for black and white tungsten fine deposit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101269352B (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101579653A (en) * | 2009-06-10 | 2009-11-18 | 广州有色金属研究院 | Benefication method for concentrating fine tungsten ore in tailings by warming scheelite |
| CN101623673B (en) * | 2009-07-01 | 2013-01-30 | 湖南有色金属研究院 | Beneficiation method of antimonyore |
| CN101716559B (en) * | 2009-12-16 | 2012-11-07 | 中南大学 | Floating and collecting agent of bertrandite beryllium ores and application thereof |
| CN101869876B (en) * | 2010-05-24 | 2012-10-24 | 广州有色金属研究院 | Ore dressing method of low-grade scheelite |
| CN102773150A (en) * | 2011-05-12 | 2012-11-14 | 云南锡业集团（控股）有限责任公司 | Polymetallic (iron, tin and zinc) ore comprehensive recovery beneficiation method |
| CN102211053B (en) * | 2011-05-27 | 2013-06-19 | 广州有色金属研究院 | Method for separating black and white tungsten bulk flotation rough concentrates |
| CN102284353A (en) * | 2011-08-15 | 2011-12-21 | 大余县东宏锡制品有限公司 | Method for recovering tungsten-tin metal from ethylene-propylene terpolymerisate (APT) wastes |
| CN102896049B (en) * | 2012-11-06 | 2015-02-25 | 永利高盛（北京）环保科技有限公司 | Beneficiation method and system |
| CN105312159A (en) * | 2014-07-18 | 2016-02-10 | 沈阳有色金属研究院 | Flotation reagent system for fine wolframite in gravity concentration tailings |
| CN104128251B (en) * | 2014-07-24 | 2016-07-20 | 江西理工大学 | A kind of beneficiation method of tungsten slurry |
| CN104874471B (en) * | 2015-06-09 | 2017-12-08 | 湖南辰州矿业有限责任公司 | A kind of technique of low-grade gold antimony tungsten paragenetic raw ore Mineral separation |
| CN105642448B (en) * | 2015-12-30 | 2018-07-27 | 中南大学 | A method of efficiently separating wolframite and white tungsten fine ore from tungsten ore |
| CN105413855B (en) * | 2015-12-30 | 2018-01-12 | 中南大学 | A kind of method of tungsten rough concentrate cleaning and Purification |
| CN105728178B (en) * | 2016-03-16 | 2017-12-08 | 江西耀升钨业股份有限公司 | A kind of method of the efficient comprehensive reutilization of tungsten slurry |
| CN106076600B (en) * | 2016-06-15 | 2018-06-01 | 江西理工大学 | A kind of beneficiation method of low-grade difficult scheelite |
| CN107051714B (en) * | 2017-05-22 | 2019-01-22 | 广东省资源综合利用研究所 | A kind of beneficiation method recycling scheelite from sulfide ore tailings |
| CN107520064A (en) * | 2017-10-11 | 2017-12-29 | 江西理工大学 | A kind of preparation method and applications of Fine wolframite flotation collector |
| CN109078762B (en) * | 2018-08-14 | 2021-01-08 | 河南天鸿选矿科技有限公司 | Oxidized ore mineral flotation collector |
| CN109182784A (en) * | 2018-10-19 | 2019-01-11 | 赣州海创钨业有限公司 | A kind of tungsten ore green smelting process |
| CN110038718B (en) * | 2019-04-19 | 2021-03-26 | 赣州金环磁选设备有限公司 | Process for efficiently separating micro-fine tungsten ore by using centrifugal machine and flotation |
| CN110479498B (en) * | 2019-07-22 | 2022-03-01 | 广东省资源综合利用研究所 | Beneficiation method for recovering tin and silver from skarn type low-grade tin tailings |
| CN110614159A (en) * | 2019-08-20 | 2019-12-27 | 湖南柿竹园有色金属有限责任公司 | Pre-enrichment method before black and white tungsten separation |
| CN111495579B (en) * | 2020-04-28 | 2022-04-12 | 赣州有色冶金研究所有限公司 | Method for recovering tungsten and tin from fine mud and coarse sand |
| CN113019685A (en) * | 2021-04-09 | 2021-06-25 | 江西理工大学 | Beneficiation method for recycling wolframite from tungsten fine mud |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133265A (en) * | 1995-10-23 | 1996-10-16 | 北京矿冶研究总院 | Beneficiation method for recovering wolframite and scheelite from complex polymetallic ore |
| CN1321547A (en) * | 2000-04-28 | 2001-11-14 | 广州有色金属研究院 | Collecting agent compound for floatation of tungsten mineral and its synthesizing method and application |
| CN1600444A (en) * | 2004-10-27 | 2005-03-30 | 广州有色金属研究院 | Mineral dressing method for black and white tungsten minerals |
-
2008
- 2008-05-05 CN CN2008100278736A patent/CN101269352B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133265A (en) * | 1995-10-23 | 1996-10-16 | 北京矿冶研究总院 | Beneficiation method for recovering wolframite and scheelite from complex polymetallic ore |
| CN1321547A (en) * | 2000-04-28 | 2001-11-14 | 广州有色金属研究院 | Collecting agent compound for floatation of tungsten mineral and its synthesizing method and application |
| CN1600444A (en) * | 2004-10-27 | 2005-03-30 | 广州有色金属研究院 | Mineral dressing method for black and white tungsten minerals |
Non-Patent Citations (10)
| Title |
|---|
| 周晓彤等.黑白钨细泥选矿新工艺的研究.材料研究与应用1 4.2007,5(4),全文. |
| 周晓彤等.黑白钨细泥选矿新工艺的研究.材料研究与应用1 4.2007,5(4),全文. * |
| 安占涛等.钨选矿工艺及其进展.矿业工程5 3.2005,5(4),全文. |
| 安占涛等.钨选矿工艺及其进展.矿业工程5 3.2005,5(4),全文. * |
| 张忠汉等.难选白钨矿重－浮选矿新工艺的研究.广州有色金属学报11 2.2001,5(4),全文. |
| 张忠汉等.难选白钨矿重-浮选矿新工艺的研究.广州有色金属学报11 2.2001,5(4),全文. * |
| 晏大雄.新邵钨矿白钨选矿工艺研究.湖南有色金属12 6.1996,12(6),第24页. |
| 晏大雄.新邵钨矿白钨选矿工艺研究.湖南有色金属12 6.1996,12(6),第24页. * |
| 管则皋等.用浮选工艺回收低品位细脉型黑白钨矿的试验研究.矿产综合利用 2.2006,5(4),全文. |
| 管则皋等.用浮选工艺回收低品位细脉型黑白钨矿的试验研究.矿产综合利用 2.2006,5(4),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101269352A (en) | 2008-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101269352B (en) | Beneficiation method for black and white tungsten fine deposit | |
| CN101869876B (en) | Ore dressing method of low-grade scheelite | |
| AU2017101078A4 (en) | Beneficiation method for high-clay mixed lead-zinc oxide-sulfide ore | |
| CN106540800B (en) | A method of gold and microfine antimony mineral in recycling flotation tailing containing Sb-Au ore | |
| CN104209183B (en) | A kind of beneficiation method of wulfenite | |
| CN101648157B (en) | Beneficiation method of black and white tungsten mineral | |
| CN102029220B (en) | Separating flotation method of low-grade complex lead-antimony-zinc | |
| CN101579653A (en) | Benefication method for concentrating fine tungsten ore in tailings by warming scheelite | |
| CN106076590B (en) | Beneficiation method for separating molybdenum oxide tungsten ore and molybdenum sulfide ore in molybdenum tungsten ore | |
| CN104874471B (en) | A kind of technique of low-grade gold antimony tungsten paragenetic raw ore Mineral separation | |
| CN111495788B (en) | Method for intelligently and preferentially selecting copper-blue-containing copper sulfide ore by X-ray | |
| CN106984425B (en) | A kind of sub-prime classification diversion processing method of Lower Grade Micro-fine Grain tin ore | |
| CN103551245B (en) | Complex multi-metal micro fine particle sulphide ore is carried out to the beneficiation method of synthetical recovery | |
| CN101585017A (en) | Ore-selecting method of difficultly-selected copper zinc sulphur ore | |
| CN101269353A (en) | Beneficiation method for recycling scheelite from tungsten ore rich in mispickel | |
| CN113976304B (en) | Mineral separation method for comprehensively recovering tungsten, tin, bismuth and silicon from skarn type tin tailings | |
| CN102872970A (en) | Process for improving quality and reducing impurities of tin stone multi-metal sulfide ore tin ore concentrate and combined equipment | |
| CN111841826B (en) | Beneficiation method for high-calcium carbonate type low-grade scheelite | |
| CN106076600A (en) | A kind of low-grade refractory processes the beneficiation method of scheelite | |
| CN114471960B (en) | Beneficiation method for gold antimony ore | |
| CN110170381A (en) | A kind of beneficiation method recycling cassiterite from tin copper mineral intergrowth | |
| CN105013616A (en) | Method for separating molybdenum concentrate and lead-sulfur concentrate from molybdenum-lead-sulfur mixed concentrate | |
| CN108176516A (en) | A kind of ore-dressing technique of Gold Antimony intergrown ore stone | |
| CN104689901B (en) | Comprehensive recovery beneficiation method of tungsten/tin/zinc polymetallic ores | |
| CN106391297B (en) | A kind of beneficiation method of copper and tin sulphide ore |
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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20080924 Assignee: GUANGZHOU YUEYOU ACADEMY MINERAL RESOURCE TECHNOLOGY CO.,LTD. Assignor: GUANGZHOU Research Institute OF NON FERROUS METALS Contract record no.: 2012440000608 Denomination of invention: Beneficiation method for black and white tungsten fine deposit Granted publication date: 20120530 License type: Exclusive License Record date: 20121113 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180208 Address after: 510651 Changxin Road, Tianhe District, Guangzhou, Guangzhou, Guangdong Patentee after: GUANGDONG INSTITUTE OF RESOURCES COMPREHENSIVE UTILIZATION Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: GUANGZHOU Research Institute OF NON FERROUS METALS |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |