CN107442294A - A kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore - Google Patents
A kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore Download PDFInfo
- Publication number
- CN107442294A CN107442294A CN201710793253.2A CN201710793253A CN107442294A CN 107442294 A CN107442294 A CN 107442294A CN 201710793253 A CN201710793253 A CN 201710793253A CN 107442294 A CN107442294 A CN 107442294A
- Authority
- CN
- China
- Prior art keywords
- white tungsten
- flotation
- normal temperatures
- collecting agent
- fine ore
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore, belongs to technical field of beneficiation.This method is adjusted to 9 or so first by sizing mixing, by pH values of pulp, then suppresses calcic gangue mineral using the inhibitor of QTS 01, adds collecting agent, inhibitor QTS 01 is sodium humate and waterglass weight 1:40 are matched, and as collecting agent, weight ratio is 5 for the combination of enuatrol and benzyl hydroximic acid:1, finally through one roughing, six times selected, and once purging selection obtains white tungsten fine ore.The present invention is scheelite normal temperature flotation technology, improves resource utilization, reduces environmental pollution, reduces cost, improves the economic benefit of enterprise.
Description
Technical field
The present invention relates to technical field of beneficiation, particularly relates to the side that a kind of flotation at normal temperatures obtains qualified white tungsten fine ore
Method.
Background technology
China's tungsten resource reserves occupy the first in the world, wherein it is scheelite to have 2/3rds, wolframite money is picked up with easy
The increasingly depleted in source, strengthens pair and the symbiosis of calcic gangue, geologic grade is low, the utilization of scheelite resource that are not easy to exploit are compeled
In the eyebrows and eyelashes.But scheelite is usually in fine-grained disseminated grain, head grade is relatively low, and often with the preferable calcic gangue mineral of floatability
Symbiosis, therefore the separation of scheelite and calcic gangue mineral is always a problem of ore dressing circle.Based on scheelite and calcic arteries and veins
It is difficult to separate between stone ore thing, white tungsten fine ore index is bad, currently in order to obtaining qualified white tungsten fine ore, in process of production in vain
The flotation of tungsten ore employs special technique.Scheelite recovery is often divided into roughing section and selected section.Scheelite roughing uses more
Use fatty acid collecting agent flotation after being sized mixing in alkaline medium, usual regulator be combined as waterglass+sodium hydroxide, waterglass+
Sodium carbonate, waterglass+sodium hydroxide+sodium carbonate, lime+sodium carbonate -+waterglass, lime+waterglass etc., rough concentrate grade is past
It is past very low.It is selected typically to use heating concentration method (that Jean-Yves Le Déroff method).Heating method is that the concentrated rear addition of white tungsten rough concentrate is big
Waterglass is measured, 90 DEG C or so is then heated up to, insulated and stirred one hour, makes collecting agent from gangue mineral (fluorite, calcite etc.)
Upper selectivity desorption, and by the strong inhibition of waterglass, and the collecting agent on scheelite surface remains to firmly adsorb, and then dilutes
Normal temperature concentration, it can obtain containing WO3More than 65% high-grade white tungsten fine ore.The method is relatively strong to the adaptability of ore, sorting index
It is stable, it is used widely on scheelite mountain.But this technique is added using strong mixing, high pH, high waterglass dosage, steam
Temperature, beneficiation cost height, complex operation, energy consumption are big, beneficiation wastewater intractability is big, and the influence to water environment is big, and it is normal to be badly in need of exploitation
The advanced white tungsten dressing process of temperature or dry glass.Normal temperature method is that a greater amount of waterglass normal temperature of rough concentrate addition stirs for a long time
Mix, to suppress gangue mineral, pass through multiple selected acquisition white tungsten fine ore.The method beneficiation cost is relatively low, but to the adaptability of ore
Not as good as heating method, sorting index fluctuation is larger, impure height, generally adds salt Ore Leaching just to obtain WO again3More than 65%
Qualified white tungsten fine ore.In order to obtain qualified white tungsten fine ore under normal temperature condition, ore dressing worker has done substantial amounts of research, mainly
Concentrate on the inhibitor of high-efficient collecting agent and energy strong inhibition calcic gangue.There is data to show, in normal temperature concentration, by adjusting
Macromolecular organic inhibitor is added in whole dose, optionally suppresses calcic gangue, while do not influence the floatation indicators of scheelite.Greatly
Molecule organic inhibitor turns into the focus of research, had in terms of current development trend to macromolecular once again because its dosage is low, efficiency high
Machine inhibitor is modified will turn into new focus so as to improve the selectivity of suppression.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore.
This method comprises the following steps：
(1) size mixing：
Scheelite raw ore is configured to concentration and is 30-35% ore pulp, and is injected in flotation device, pH values of pulp is adjusted to 7-
11；
(2) roughing：
Inhibitor QTS-01 is added in ore pulp after being sized mixing into step (1), suppresses calcic gangue mineral, stirs 2-
After 15min, collecting agent is added, roughing is carried out, obtains white tungsten rough concentrate and rougher tailings；
(3) scan：
Collecting agent is added into the rougher tailings obtained by step (2), once purging selection is carried out, obtains mine tailing and scavenger concentrate,
Scavenger concentrate returns to roughing；
(4) six times selected：
White tungsten rough concentrate concentration is concentrated to 50-70%, adds QTS-01 inhibitor, and stir 30- at normal temperatures
60min, collecting agent is added, then carry out primary cleaning, primary cleaning concentrate carries out recleaning, and primary cleaner tailing returns thick
Choosing, continue five times it is selected, the selected obtained concentrate of last time is white tungsten fine ore.
Wherein, WO in scheelite raw ore in step (1)3Content is 0.40%-0.60%.
Inhibitor QTS-01 is the combination medicament of sodium humate and waterglass in step (2), and weight ratio is：Sodium humate and
The ratio between waterglass 1:40, addition is：1500-2500g/t.
Collecting agent is the composition of enuatrol and benzyl hydroximic acid, enuatrol and benzyl hydroximic acid weight ratio in step (2)
For 5:1, collector dosage 300-600g/t.
Collector dosage is 150-300g/t in step (3).
Selected addition inhibitor QTS-01 amount is 600-2000g/t for the first time in step (4), and the amount for adding collecting agent is
100-300g/t。
The above-mentioned technical proposal of the present invention has the beneficial effect that：
In such scheme, resource utilization is improved, reduces environmental pollution, greatly reduces production cost, avoids pacifying
Full accident, realize clean manufacturing and improve Business Economic Benefit.
Brief description of the drawings
Fig. 1 is that the flotation at normal temperatures of the present invention obtains the method process chart of qualified white tungsten fine ore.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore, as shown in figure 1, this method includes
Size mixing, roughing, scan, six steps such as selected.It is explained below with specific embodiment.
Embodiment 1
1) size mixing, roughing：By WO3The scheelite raw ore regulation pulp density of content 0.49% is 30%, while adjusts ore deposit
It is 9 to starch pH value, then, adds QTS-01 inhibitor 2050g/t, stirs 5 minutes.Collecting agent is added, one roughing is carried out, catches
Agent dosage 470g/t is received, wherein, the weight of sodium humate and waterglass ratio is 1 in QTS-01 inhibitor:40, oleic acid in collecting agent
The weight of sodium and benzyl hydroximic acid ratio is 5:1.After one roughing, white tungsten rough concentrate and rougher tailings are obtained.Rougher tailings
Middle addition collecting agent, once purging selection is carried out, obtain mine tailing and scavenger concentrate, scavenger concentrate returns to roughing.
2) scheelite rough concentrate is selected：The white tungsten rough concentrate concentration that roughing is obtained is concentrated to 60%, adds QTS-01 suppressions
Preparation 500g/t, and stir 45 minutes at normal temperatures；Selected addition QTS-01 inhibitor 700g/t for the first time, add enuatrol and
The combined capturing and collecting agent 300g/t of benzyl hydroximic acid, then proceed with five times it is selected, selected concentrate each time enters next time
Selected, it is selected that mine tailing returns to upper level.
Finally, it is as shown in table 1 through one roughing, once purging selection, six selected acquisition white tungsten fine ores, specific sorting index：
Scheelite Flotation closed-circuit test result under the normal temperature of table 1
| Product | Yield | Grade | The rate of recovery |
| Concentrate | 0.59 | 65.45 | 79.28 |
| Mine tailing | 99.41 | 0.10 | 20.72 |
| Raw ore | 100.00 | 0.49 | 100.00 |
Embodiment 2
1) size mixing, roughing：By WO3The scheelite raw ore regulation pulp density of content 0.52% is 33%, while adjusts ore deposit
It is 8.5 to starch pH value, then, adds QTS-01 inhibitor 1800g/t, stirs 10 minutes.Collecting agent is added, is carried out once thick
Choosing, collector dosage 500g/t, wherein, sodium humate and waterglass weight ratio are 1 in QTS-01 inhibitor:40, in collecting agent
The weight of enuatrol and benzyl hydroximic acid ratio is 5:1.After one roughing, white tungsten rough concentrate and rougher tailings are obtained.Roughing
Collecting agent is added in mine tailing, carries out once purging selection, obtains mine tailing and scavenger concentrate, scavenger concentrate returns to roughing.
2) scheelite rough concentrate is selected：The white tungsten rough concentrate concentration that roughing is obtained is concentrated to 63%, adds QTS-01 suppressions
Preparation 500g/t, and stir 50 minutes at normal temperatures；Selected addition QTS-01 inhibitor 800g/t for the first time, add enuatrol and
The combined capturing and collecting agent 250g/t of benzyl hydroximic acid, then proceed with five times it is selected, selected concentrate each time enters next time
Selected, it is selected that mine tailing returns to upper level.
Finally, it is as shown in table 2 through one roughing, once purging selection, six selected acquisition white tungsten fine ores, specific sorting index：
Scheelite Flotation closed-circuit test result under the normal temperature of table 2
| Product | Yield | Grade | The rate of recovery |
| Concentrate | 0.62 | 65.72 | 78.96 |
| Mine tailing | 99.38 | 0.11 | 21.04 |
| Raw ore | 100.00 | 0.52 | 100.00 |
Embodiment 3
1) size mixing, roughing：By WO3The scheelite raw ore regulation pulp density of content 0.45% is 35%, while adjusts ore deposit
It is 9 to starch pH value, then, adds QTS-01 inhibitor 2100g/t, stirs 5 minutes.Collecting agent is added, one roughing is carried out, catches
Agent dosage 450g/t is received, wherein, sodium humate and waterglass weight ratio 1 in QTS-01 inhibitor:40, enuatrol in collecting agent
Weight ratio with benzyl hydroximic acid is 5:1.After one roughing, white tungsten rough concentrate and mine tailing are obtained.Added in rougher tailings
Collecting agent, once purging selection is carried out, obtain mine tailing and scavenger concentrate, scavenger concentrate returns to roughing.
2) scheelite rough concentrate is selected：The white tungsten rough concentrate concentration that roughing is obtained is concentrated to 63%, adds QTS-01 suppressions
Preparation (500g/t), and stir 60 minutes at normal temperatures；Selected addition QTS-01 inhibitor 1000g/t for the first time, add oleic acid
The combined capturing and collecting agent 300g/t of sodium and benzyl hydroximic acid, then proceed with five times it is selected, under selected concentrate each time enters
Primary cleaning, it is selected that mine tailing returns to upper level.
Finally, it is as shown in table 3 through one roughing, once purging selection, six selected acquisition white tungsten fine ores, specific sorting index：
Scheelite Flotation closed-circuit test result under the normal temperature of table 3
| Product | Yield | Grade | The rate of recovery |
| Concentrate | 0.54 | 65.61 | 78.42 |
| Mine tailing | 99.46 | 0.098 | 21.58 |
| Raw ore | 100.00 | 0.45 | 100.00 |
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore, it is characterised in that：Comprise the following steps：
(1) size mixing：
Scheelite raw ore is configured to concentration and is 30-35% ore pulp, and is injected in flotation device, pH values of pulp is adjusted to 7-11；
(2) roughing：
Inhibitor QTS-01 is added in ore pulp after being sized mixing into step (1), after stirring 2-15min, adds collecting agent, is carried out
Roughing, obtain white tungsten rough concentrate and rougher tailings；
(3) scan：
Collecting agent is added into the rougher tailings obtained by step (2), once purging selection is carried out, obtains mine tailing and scavenger concentrate, scan
Concentrate returns to roughing；
(4) six times selected：
White tungsten rough concentrate concentration is concentrated to 50-70%, adds QTS-01 inhibitor, and stirs 30-60min at normal temperatures, is added
Enter collecting agent, then carry out primary cleaning, the primary cleaning concentrate of gained is subjected to recleaning, the primary cleaner tailing of gained
Return to roughing, continue five times it is selected, the selected obtained concentrate of last time is white tungsten fine ore.
2. the method that flotation at normal temperatures according to claim 1 obtains qualified white tungsten fine ore, it is characterised in that：The step
Suddenly WO in scheelite raw ore in (1)3Content is 0.40%-0.60%.
3. the method that flotation at normal temperatures according to claim 1 obtains qualified white tungsten fine ore, it is characterised in that：The step
Suddenly inhibitor QTS-01 is the combination medicament of sodium humate and waterglass in (2), and weight ratio is：The ratio between sodium humate and waterglass
1:40, addition is：1500-2500g/t.
4. the method that flotation at normal temperatures according to claim 1 obtains qualified white tungsten fine ore, it is characterised in that：The step
Suddenly collecting agent is the composition of enuatrol and benzyl hydroximic acid in (2), and enuatrol and benzyl hydroximic acid weight ratio are 5:1, collecting
Agent dosage is 300-600g/t.
5. the method that flotation at normal temperatures according to claim 1 obtains qualified white tungsten fine ore, it is characterised in that：The step
Suddenly collector dosage is 150-300g/t in (3).
6. the method that flotation at normal temperatures according to claim 1 obtains qualified white tungsten fine ore, it is characterised in that：The step
Suddenly selected addition inhibitor QTS-01 amount is 600-2000g/t for the first time in (4), and the amount for adding collecting agent is 100-300g/
t。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710793253.2A CN107442294A (en) | 2017-09-04 | 2017-09-04 | A kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710793253.2A CN107442294A (en) | 2017-09-04 | 2017-09-04 | A kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107442294A true CN107442294A (en) | 2017-12-08 |
Family
ID=60495819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710793253.2A Pending CN107442294A (en) | 2017-09-04 | 2017-09-04 | A kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107442294A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108543631A (en) * | 2018-05-10 | 2018-09-18 | 江西理工大学 | A kind of beneficiation method of skarn type scheelite |
| CN113477409A (en) * | 2021-07-21 | 2021-10-08 | 东北大学 | Calcium-containing gangue combined inhibitor for scheelite flotation and preparation and application methods thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4366050A (en) * | 1981-01-19 | 1982-12-28 | Amax Inc. | Scheelite flotation |
| EP0368061A1 (en) * | 1988-10-29 | 1990-05-16 | Henkel Kommanditgesellschaft auf Aktien | Surface-active derivatives of fatty-acid esters and/or fatty acids as collectors in the flotation of non-sulfidic ores |
| 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 |
| CN102500465A (en) * | 2011-11-22 | 2012-06-20 | 广州有色金属研究院 | Benefication method for bastnaesite |
| CN106000655A (en) * | 2016-06-08 | 2016-10-12 | 江西理工大学 | Method for selecting scheelite at normal temperature |
| CN106076600A (en) * | 2016-06-15 | 2016-11-09 | 江西理工大学 | A kind of low-grade refractory processes the beneficiation method of scheelite |
-
2017
- 2017-09-04 CN CN201710793253.2A patent/CN107442294A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4366050A (en) * | 1981-01-19 | 1982-12-28 | Amax Inc. | Scheelite flotation |
| EP0368061A1 (en) * | 1988-10-29 | 1990-05-16 | Henkel Kommanditgesellschaft auf Aktien | Surface-active derivatives of fatty-acid esters and/or fatty acids as collectors in the flotation of non-sulfidic ores |
| 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 |
| CN102500465A (en) * | 2011-11-22 | 2012-06-20 | 广州有色金属研究院 | Benefication method for bastnaesite |
| CN106000655A (en) * | 2016-06-08 | 2016-10-12 | 江西理工大学 | Method for selecting scheelite at normal temperature |
| CN106076600A (en) * | 2016-06-15 | 2016-11-09 | 江西理工大学 | A kind of low-grade refractory processes the beneficiation method of scheelite |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108543631A (en) * | 2018-05-10 | 2018-09-18 | 江西理工大学 | A kind of beneficiation method of skarn type scheelite |
| CN113477409A (en) * | 2021-07-21 | 2021-10-08 | 东北大学 | Calcium-containing gangue combined inhibitor for scheelite flotation and preparation and application methods thereof |
| CN113477409B (en) * | 2021-07-21 | 2022-09-27 | 东北大学 | Calcium-containing gangue combined inhibitor for scheelite flotation and preparation and application methods thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106000655B (en) | A kind of method of selected scheelite under room temperature | |
| CN104084315B (en) | Beneficiation method for separating fluorite and tungsten through flotation | |
| CN103418488B (en) | Comprehensive recovery process of lithium polymetallic ore associated with fine niobium and tantalum | |
| CN106076590B (en) | Beneficiation method for separating molybdenum oxide tungsten ore and molybdenum sulfide ore in molybdenum tungsten ore | |
| CN102302981B (en) | Beneficiation reagent and method for separating copper-molybdenum mixed concentrates | |
| CN104162480A (en) | Method for separating copper ore, molybdenum ore, bismuth ore and sulfur ore | |
| CN103551255B (en) | Molybdenum oxide ore flotation collecting agent and using method | |
| CN103480494B (en) | Process of recovering ultrafine molybdenum from abandoned ultrafine tailings from iron ore dressing | |
| CN106622634A (en) | Beneficiation method for copper-cobalt ore | |
| CN104148163B (en) | A kind of beneficiation method processing low-grade tin-lead-zinc multi-metal oxygen ore deposit | |
| CN103506214B (en) | Separation-flotation technology of rough sand and secondary slime of vein gold ores | |
| CN106076600A (en) | A kind of low-grade refractory processes the beneficiation method of scheelite | |
| CN105013616B (en) | A kind of method that molybdenum concntrate and lead iron concentrate are separated in the lead sulfide mixed concentrate from molybdenum | |
| CN109607527A (en) | A kind of purification by mineral method of low-grade micro crystal graphite | |
| CN106563561A (en) | Method of improving rare earth grade of hybrid rare earth ores | |
| CN109201320A (en) | A kind of beneficiation method of the cobalt ore of copper containing easy-floating gangue | |
| CN105880007B (en) | A kind of separation method of tennantite and galena | |
| CN106391320A (en) | Beneficiation method for high-calcium fluorite | |
| CN107442294A (en) | A kind of method that flotation at normal temperatures obtains qualified white tungsten fine ore | |
| CN103433144B (en) | Flotation agent for flotation of kustelite and flotation method | |
| CN105214849B (en) | A kind of beneficiation method for improving scheelite concentration process concentrate grade | |
| CN110479494A (en) | A kind of method for concentrating promoting low-grade scheelite Floatation Concentrate Grade | |
| CN110142144A (en) | The method that low-grade difficulty selects Flotation of Zinc Oxide in oxysulphied lead-zinc ore tailings | |
| CN206924887U (en) | A kind of iron copper sulphur ore deposit ore-sorting system | |
| CN101455997A (en) | Method for increasing molybdenum ore dressing recovery percentage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ai Guanghua Inventor after: Qiu Tingsheng Inventor after: Song Yifu Inventor after: Yan Huashan Inventor after: Tu Yanqiong Inventor after: Xiao Guosheng Inventor before: Qiu Tingsheng Inventor before: Ai Guanghua Inventor before: Song Yifu Inventor before: Yan Huashan |
|
| CB03 | Change of inventor or designer information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171208 |
|
| RJ01 | Rejection of invention patent application after publication |