CN208711937U - A kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell - Google Patents
A kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell Download PDFInfo
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- CN208711937U CN208711937U CN201821419354.XU CN201821419354U CN208711937U CN 208711937 U CN208711937 U CN 208711937U CN 201821419354 U CN201821419354 U CN 201821419354U CN 208711937 U CN208711937 U CN 208711937U
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- carbon containing
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 46
- 239000010931 gold Substances 0.000 title claims abstract description 46
- 238000005188 flotation Methods 0.000 title claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 35
- 238000012545 processing Methods 0.000 title claims abstract description 30
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 18
- 239000011707 mineral Substances 0.000 description 18
- 239000003814 drug Substances 0.000 description 17
- 239000006260 foam Substances 0.000 description 14
- 230000009471 action Effects 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000002283 diesel fuel Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 229940079593 drug Drugs 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910001748 carbonate mineral Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- AAJRIJBGDLLRAE-UHFFFAOYSA-M sodium;butoxymethanedithioate Chemical compound [Na+].CCCCOC([S-])=S AAJRIJBGDLLRAE-UHFFFAOYSA-M 0.000 description 1
- ZKDDJTYSFCWVGS-UHFFFAOYSA-M sodium;diethoxy-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Na+].CCOP([S-])(=S)OCC ZKDDJTYSFCWVGS-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model discloses a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cells, including a slot, two slots and pedestal, pedestal is set to the bottom of a slot and two slots, top plate is equipped at the top of one slot and two slots, the bottom of top plate side, which is equipped with, adds the mouth of a river, side at the top of top plate is equipped with motor cabinet, there is motor at the top of motor cabinet by the way that bolt is vertically-mounted, and motor cabinet and top plate weld, the top of motor is equipped with the first belt pulley, first belt pulley is fixedly connected with the rotor-end of motor, with the gold recovery for significantly improving high carbon containing microfine gruel rib type processing complex gold ore, it is simple to operate, high carbon containing microfine gruel rib type processing complex gold ore resource can be made to obtain the advantages of making effective use of.
Description
Technical field
The utility model relates to ore floatation reservoir fields, are especially a kind of high carbon containing microfine gruel rib type processing complex gold ore
Flotation cell.
Background technique
With the rapid exploitation of Mineral resources, tractable aventurine and the Indigenous Gold-bearing easily soaked are increasingly reduced, intractable
Gold ore resource is more and more taken seriously.Reasonable, efficient, the environmentally friendly development and utilization of difficult-treating gold mine resource, it has also become
The technical issues of each pan state, the world currently mainly faces.Foreign countries select smelting skill to the difficult processing complex gold ore of the carbonaceous of microfine
Art research and development essentially consist in " robbing gold " property of removing carbonate minerals in advance, domestic to carry out new around the golden flotation recovery rate of raising
Type, efficient and combined flotation medicament research, exploitation and application etc. make great progress, to the golden floating product of raising
Quality and the rate of recovery have played important function.And high carbon containing, microfine mylonite processing complex gold ore effective flotation technology is always
In R&D process.
However, the analysis found that, the existing carbon containing microfine gruel rib type processing complex gold ore flotation cell of height there are it is following not
Foot: first, organic carbon and graphitic carbon content are high in high carbon containing microfine gruel rib type refractory gold ore, it is serious to adsorb flotation medicine
Agent has increased considerably dosing；Second, constraining the chemically and physically effect of medicament and golden carrier mineral simultaneously, increase
Flotation time, causes the conventional flotation rate of recovery relatively low.
Utility model content
Therefore, in order to solve above-mentioned deficiency, the utility model provides a kind of complicated gold of high carbon containing microfine gruel rib type herein
Ore floatation reservoir has the gold recovery for significantly improving high carbon containing microfine gruel rib type processing complex gold ore, simple to operate, can
High carbon containing microfine gruel rib type processing complex gold ore resource is set to obtain sufficiently effective utilizing advantage.
The utility model is realized in this way constructing a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell, wrap
A slot, two slots and pedestal are included, pedestal is set to the bottom of a slot and two slots, is equipped with top plate, top plate at the top of a slot and two slots
The bottom of side, which is equipped with, adds the mouth of a river, and the side at the top of top plate is equipped with motor cabinet, and the top of motor cabinet has by the way that bolt is vertically-mounted
Motor, and motor cabinet and top plate weld, the top of motor is equipped with the first belt pulley, the rotor of the first belt pulley and motor
End is fixedly connected, and the adjacent side of motor cabinet is equipped with center axis seat, and the inside of center axis seat is equipped with central axis, and the top of central axis is welded
There is the second belt pulley, the middle position of the second belt pulley and the first belt pulley is equipped with driving belt, and nesting is set driving belt respectively
It is placed in the first belt pulley and the second belt pulley, the bottom of central axis is equipped with impeller, and impeller and central axis are bolted company
It connects, the top of the lateral surface of impeller is equipped with snorkel, and the side on the top of two slots is equipped with the second chute, and the second chute and two slots connect
It is logical.
As an improvement of the above technical solution, PHG-2 industry pH meter, PHG-2 industry soda acid are installed at the top of top plate
Meter is bolted to connection with top plate.Detection when ore pulp acid-base accommodation is carried out by the PHG-2 industry pH meter of setting,
Operation can be facilitated, keep soda acid control accurate.
As an improvement of the above technical solution, the middle position of a slot and two slots is equipped with the first chute, and a slot and two slots
It is connected to the first chute.A slot and two slots are connected by the first chute of setting, make the complicated gold of high carbon containing microfine gruel rib type
After ore completes roughing flotation in a slot, the target gold mine slurry trapped enters two slots and carries out secondary flotation, improves recycling
Rate.
As an improvement of the above technical solution, motor is specially Y80M1-2 type motor, power 0.75KW.It is logical
The motor and driving belt for crossing setting drive central axis rotation, form the impeller generation centrifugal action of central axis bottom end negative
On the one hand pressure sucks sufficient air and mixes with ore pulp, on the one hand stirs ore pulp and mix with drug, while refining foam, according to
Using the characteristic of medicament, make to float to mineral slurry level on mineral adhesive foam compatible with medicament and re-form mineralized froth, finally
The target mineral foam of institute's flotation is scraped using scraper dedicated and is further processed.
The utility model provides a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell by improving herein, and existing
There is high carbon containing microfine gruel rib type processing complex gold ore flotation cell to compare, has the advantages that high carbon containing fine with significantly improving
The gold recovery of the rotten rib type processing complex gold ore of grain, it is simple to operate, high carbon containing microfine gruel rib type processing complex gold ore money can be made
Source obtains sufficiently effective using advantage, embodies are as follows:
Advantage 1: PHG-2 industry pH meter, PHG-2 industry pH meter and top plate are installed solid by bolt at the top of top plate
Fixed connection.Detection when ore pulp acid-base accommodation is carried out by the PHG-2 industry pH meter of setting, operation can be facilitated, make acid
Alkali control is accurate.
The middle position of 2: one slot of advantage and two slots is equipped with the first chute, and a slot and two slots are connected to the first chute.
A slot and two slots are connected by the first chute of setting, complete high carbon containing microfine gruel rib type processing complex gold ore in a slot
After roughing flotation, the target gold mine slurry trapped enters two slots and carries out secondary flotation, improves the rate of recovery.
Advantage 3: motor is specially Y80M1-2 type motor, power 0.75KW.Pass through the motor and biography of setting
Dynamic belt drives central axis rotation, so that the impeller of central axis bottom end is generated centrifugal action and forms negative pressure, one side sucks sufficient
Air is mixed with ore pulp, is on the one hand stirred ore pulp and is mixed with drug, while refining foam, according to the characteristic for using medicament, make and
It on the compatible mineral adhesive foam of medicament, floats to mineral slurry level and re-forms mineralized froth, will finally be floated using scraper dedicated
The target mineral foam of choosing, which scrapes, to be further processed.
Detailed description of the invention
Fig. 1 is a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell structure schematic diagram of the utility model；
Fig. 2 is a kind of vertical profile structural representation of high carbon containing microfine gruel rib type processing complex gold ore flotation cell of the utility model
Figure.
Serial number as shown in the figure: a slot 1, two slots 2, pedestal 3, add the mouth of a river 4, top plate 5, pH meter 6, motor cabinet 7, motor 8,
First belt pulley 9, the second belt pulley 10, driving belt 11, central axis 12, center axis seat 13, impeller 14, snorkel 15, first
Chute 16 and the second chute 17.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing 1- Fig. 2, to the skill in the utility model embodiment
Art scheme is clearly and completely described, it is clear that and the described embodiments are only a part of the embodiments of the utility model, and
The embodiment being not all of.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of labour.
The utility model provides a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell by improving herein, such as schemes
Shown in 1- Fig. 2, it can be practiced as follows；Including a slot 1, two slots 2 and pedestal 3, pedestal 3 is set to 1 He of a slot
The top of the bottom of two slots 2, a slot 1 and two slots 2 is equipped with top plate 5, and the bottom of 5 side of top plate, which is equipped with, adds the mouth of a river 4, and top plate 5 pushes up
The side in portion is equipped with motor cabinet 7, and there is motor 8 at the top of motor cabinet 7 by the way that bolt is vertically-mounted, and motor cabinet 7 and top plate 5 weld
It connects, the top of motor 8 is equipped with the first belt pulley 9, and the first belt pulley 9 is fixedly connected with the rotor-end of motor 8, motor cabinet 7
Adjacent side be equipped with center axis seat 13, the inside of center axis seat 13 is equipped with central axis 12, and the top of central axis 12 is welded with the second skin
The middle position of belt wheel 10, the second belt pulley 10 and the first belt pulley 9 is equipped with driving belt 11, and nesting is set driving belt 11 respectively
It is placed in the first belt pulley 9 and the second belt pulley 10, the bottom of central axis 12 is equipped with impeller 14, and impeller 14 passes through with central axis 12
Bolt is fixedly connected, and the top of the lateral surface of impeller 14 is equipped with snorkel 15, and the side on the top of two slots 2 is equipped with the second chute
17, the second chute 17 is connected to two slots 2.
The top of top plate 5 is equipped with PHG-2 industry pH meter 6, and PHG-2 industry pH meter 6 is bolted with top plate 5
Connection.Detection when ore pulp acid-base accommodation is carried out by the PHG-2 industry pH meter 6 of setting, operation can be facilitated, make soda acid
Control is accurate.
The middle position of one slot 1 and two slots 2 is equipped with the first chute 16, and a slot 1 and two slots 2 connect with the first chute 16
It is logical.A slot 1 and two slots 2 are connected by the first chute 16 of setting, make high carbon containing microfine gruel rib type processing complex gold ore in a slot 1
After completing roughing flotation in the middle, the target gold mine slurry trapped enters two slots 2 and carries out secondary flotation, improves the rate of recovery.
Motor 8 is specially Y80M1-2 type motor, power 0.75KW.Pass through the motor 8 and transmission skin of setting
Band 11 drives central axis 12 to rotate, and so that the impeller 14 of 12 bottom end of central axis is generated centrifugal action and forms negative pressure, on the one hand sucking is filled
The air of foot mix with ore pulp, and one side stirring ore pulp is mixed with drug, while refining foam, according to the characteristic for using medicament,
Make to float to mineral slurry level on mineral adhesive foam compatible with medicament and re-form mineralized froth, finally uses scraper dedicated will
The target mineral foam of institute's flotation, which scrapes, to be further processed.
Embodiment: ore feeds rod mill and carries out ore grinding, and it is 65% that mineral fineness, which is controlled in -0.074mm content, mill
The ore pulp of mine machine discharge moves into a slot 1, so that ore pulp is adjusted to mass concentration percentage 28%-33%, is firstly added lime, passes through
The pH value of ore pulp is adjusted to pH=8 ~ 9 by the detection of PHG-2 industry pH meter 6, and copper sulphate is then added and activates to sulfide,
The dosage of copper sulphate is 500g/t, action time 5 ~ 10 minutes, is subsequently added into collecting agent sodium n-butyl xanthate and aerofloat 226, catches
It receives agent dosage and adds up to 500g/t, action time 3 minutes, be eventually adding diesel oil and terpenic oil, diesel oil 50g/t using diesel oil and has
Machine carbon is all used as nonpolar organic matter, can generate stronger affinity, diesel oil gradually wraps up organic carbonaceous composition granule, to reach
Absorption property is lost to organic Carbonaceous matter surface is passivated, adsorption activity of these Carbonaceous matters to floating agent is preferably minimized, pine
Alcohol oil 30g/t, central axis 12 is rotated under the drive of motor 8 and driving belt 11, makes the impeller of 12 bottom end of central axis
14, which generate centrifugal action, forms negative pressure, mixes to suck sufficient air from the snorkel 15 communicated with outside with ore pulp, one
Aspect stirring ore pulp is mixed with drug, while refining foam, according to the characteristic for using medicament, makes gold mineral compatible with medicament
It on adhesive foam, floats to mineral slurry level and re-forms mineralized froth, finally use scraper dedicated by the target mineral foam of institute's flotation
It is moved in two slots 2 from the first chute 16, lime is added again, the pH value of ore pulp is adjusted to pH=8 ~ 9, copper sulphate to be then added
Sulfide is activated, the dosage of copper sulphate is 250g/t, action time 5 ~ 10 minutes, is subsequently added into collecting agent fourth Huang and fourth
Ammonium, collector dosage add up to 250g/t, action time 3 minutes, are eventually adding diesel oil, diesel oil 50g/t completes secondary flotation.
A kind of working principle of high carbon containing microfine gruel rib type processing complex gold ore flotation cell: this kind of flotation cell includes a slot
1 and two slots 2, it is provided with top plate 5 in a slot 1 and two slots 2 and top, is provided with 8 He of motor arranged vertically at the top of top plate 5
One central axis 12, and have the first belt pulley 9 and second respectively at the top of the rotor-end of motor 8 and at the top of central axis 12
Belt pulley 10, the two realize transmission by driving belt 11, after ore pulp enters slot 1, collecting agent are added, motor 8 starts
Central axis 12 is driven to start turning, the impeller 14 of 2 bottom ends of 12 bottom of central axis generates centrifugal action and forms negative pressure at this time, thus
It is mixed from sufficient air is sucked with the snorkel 15 that communicates of outside with ore pulp, and generates bubble, according to the characteristic for using medicament,
Make to float to mineral slurry level on gold mineral adhesive foam compatible with medicament and re-form mineralized froth, finally uses scraper dedicated
The target mineral foam of institute's flotation is moved in two slots 2 from the first chute 16, carries out secondary flotation in two slots 2.
In summary；The carbon containing microfine gruel rib type processing complex gold ore flotation cell of height described in the utility model, contains with existing height
Carbon microfine gruel rib type processing complex gold ore flotation cell, which is compared to have, significantly improves high carbon containing microfine gruel rib type processing complex gold ore
Gold recovery, it is simple to operate, high carbon containing microfine gruel rib type processing complex gold ore resource can be made to obtain sufficiently effective utilization
Advantage.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (4)
1. a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell, including a slot (1), two slots (2) and pedestal (3),
Be characterized in that: pedestal (3) is set to the bottom of a slot (1) and two slots (2), and the top of a slot (1) and two slots (2) is equal
Equipped with top plate (5), the bottom of top plate (5) side, which is equipped with, to be added the mouth of a river (4), and the side at the top of the top plate (5) is equipped with motor
The top of seat (7), the motor cabinet (7) has motor (8) by the way that bolt is vertically-mounted, and the motor cabinet (7) and the top
The top of plate (5) welding, the motor (8) is equipped with the first belt pulley (9), first belt pulley (9) and the motor
(8) rotor-end is fixedly connected, and the adjacent side of the motor cabinet (7) is equipped with center axis seat (13), the center axis seat (13) it is interior
Portion is equipped with central axis (12), is welded with the second belt pulley (10) at the top of the central axis (12), second belt pulley (10)
Driving belt (11) are equipped with the middle position of the first belt pulley (9), nesting is set to first to the driving belt (11) respectively
In belt pulley (9) and the second belt pulley (10), the bottom of the central axis (12) is equipped with impeller (14), the impeller (14) and institute
Central axis (12) to be stated to be bolted to connection, the top of the lateral surface of the impeller (14) is equipped with snorkel (15), and described two
The side on the top of slot (2) is equipped with the second chute (17), and second chute (17) is connected to two slot (2).
2. a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell according to claim 1, it is characterised in that: described
PHG-2 industry pH meter (6) is installed, the PHG-2 industry pH meter (6) passes through with the top plate (5) at the top of top plate (5)
Bolt is fixedly connected.
3. a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell according to claim 1, it is characterised in that: described
The middle position of one slot (1) and two slots (2) is equipped with the first chute (16), and a slot (1) and two slots (2) are with described first
Chute (16) connection.
4. a kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell according to claim 1, it is characterised in that: described
Motor (8) is specially Y80M1-2 type motor, power 0.75KW.
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|---|---|---|---|
| CN201821419354.XU CN208711937U (en) | 2018-08-31 | 2018-08-31 | A kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821419354.XU CN208711937U (en) | 2018-08-31 | 2018-08-31 | A kind of high carbon containing microfine gruel rib type processing complex gold ore flotation cell |
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| CN208711937U true CN208711937U (en) | 2019-04-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022089492A1 (en) * | 2020-10-27 | 2022-05-05 | 水口山有色金属有限责任公司 | Flotation method for improving grade of high-sulfur gold concentrate |
| CN116273492A (en) * | 2023-04-11 | 2023-06-23 | 中建材黑龙江石墨新材料有限公司 | Flotation equipment and method for graphite production |
-
2018
- 2018-08-31 CN CN201821419354.XU patent/CN208711937U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022089492A1 (en) * | 2020-10-27 | 2022-05-05 | 水口山有色金属有限责任公司 | Flotation method for improving grade of high-sulfur gold concentrate |
| CN116273492A (en) * | 2023-04-11 | 2023-06-23 | 中建材黑龙江石墨新材料有限公司 | Flotation equipment and method for graphite production |
| CN116273492B (en) * | 2023-04-11 | 2024-01-19 | 中建材黑龙江石墨新材料有限公司 | Flotation equipment and method for graphite production |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Complicated golden ore floatation groove of rotten arris type of fine grain of high carbon containing Effective date of registration: 20200722 Granted publication date: 20190409 Pledgee: Xi'an investment and financing Company limited by guarantee Pledgor: XI'AN TIANZHOU MINING TECHNOLOGY GROUP Co.,Ltd. Registration number: Y2020980004281 |
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