CN113578532B - Ore flotation equipment with adjustable - Google Patents
Ore flotation equipment with adjustable Download PDFInfo
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- CN113578532B CN113578532B CN202110840642.2A CN202110840642A CN113578532B CN 113578532 B CN113578532 B CN 113578532B CN 202110840642 A CN202110840642 A CN 202110840642A CN 113578532 B CN113578532 B CN 113578532B
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- 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
- B03D1/14—Flotation machines
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- 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
- B03D1/14—Flotation machines
- B03D1/16—Flotation machines with impellers; Subaeration machines
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- 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
- B03D1/14—Flotation machines
- B03D1/16—Flotation machines with impellers; Subaeration machines
- B03D1/20—Flotation machines with impellers; Subaeration machines with internal air pumps
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Abstract
The invention discloses adjustable ore flotation equipment which comprises a flotation tank, a feed hopper, a discharge port and an air pump, wherein the feed hopper is arranged on one side of the top of the flotation tank, the discharge port is arranged on one side of the top of the surface of the flotation tank, the air pump is arranged in the center of the bottom of the flotation tank, a driving rotating shaft is rotatably connected to the top of the inner wall of the flotation tank and is positioned in the center, mixing teeth are fixed on the surface of the driving rotating shaft and are vertically staggered, an adjusting foaming device is arranged in the center of the bottom of the inner wall of the flotation tank, the top of the adjusting foaming device is connected with the bottom end of the driving rotating shaft in a matched mode, and the air outlet end of the air pump is connected with the adjusting foaming device in a matched mode. This ore flotation equipment with adjustable has reached the purpose of quick adjustment bubble, can in time adjust the bubble according to the condition of ore, is convenient for adapt to different ores, has reduced the limitation, has improved performance.
Description
Technical Field
The invention relates to the technical field of ore flotation, in particular to adjustable ore flotation equipment.
Background
Ore refers to a collection of minerals from which useful components can be extracted or which themselves have some property that can be exploited. Can be divided into metal mineral and nonmetal mineral. The ore is generally composed of ore minerals and gangue minerals. Ore minerals are metal or non-metal minerals that can be utilized in the ore, also known as valuable minerals. Such as chromite in chromium ores, chalcopyrite, bornite, chalcocite and malachite in copper ores, asbestos in asbestos ores, and the like. Gangue minerals are those minerals associated with ore minerals that are temporarily unusable, also referred to as unusable minerals. Such as olivine and pyroxene in chromium ore, quartz, sericite and chlorite in copper ore, dolomite and calcite in asbestos ore, etc. Gangue minerals are mainly non-metal minerals, but also include some metal minerals, such as copper ore containing a very small amount of galena and sphalerite, and are also called gangue minerals because of no comprehensive utilization value. The weight ratio of the ore mineral and the gangue mineral contained in the ore varies with different metal ores. The same ore may vary with the grade of the ore poor or rich. In many metal ores, the portion of gangue minerals tends to far exceed that of the ore minerals. Therefore, before smelting, the ore is subjected to ore dressing, and most of useless substances are discarded before smelting.
At present, traditional ore floatation equipment can't adjust the bubble to different ores (like the size of ore granule) at the flotation process for the ore is poor with the attached effect of bubble, can't effectual messenger's ore absorption on the foam, is difficult to improve the precision of flotation, has reduced performance.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides adjustable ore flotation equipment, which solves the problems that the traditional ore flotation equipment cannot adjust bubbles according to different ores (such as the sizes of ore particles) in the flotation process, so that the attachment effect of the ores and the bubbles is poor, the ores cannot be effectively adsorbed on the bubbles, the flotation precision is difficult to improve, and the use performance is reduced.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an adjustable ore flotation device comprises a flotation tank, a feed hopper, a discharge port and an air pump, wherein the feed hopper is arranged on one side of the top of the flotation tank, the discharge port is arranged on one side of the top of the surface of the flotation tank, and the air pump is arranged in the center of the bottom of the flotation tank;
the inside of flotation tank is equipped with drive pivot, compounding tooth, adjusts the foaming device, the drive pivot is rotated and is connected at the inner wall top of flotation tank and is located central point, the compounding tooth is fixed on the surface of drive pivot and staggered arrangement from top to bottom, adjust the inner wall bottom central point that the foaming device set up at the flotation tank and put, the cooperation is connected between the top of adjusting the foaming device and the bottom of drive pivot, the end of giving vent to anger of air pump is connected with the cooperation between the regulation foaming device.
Preferably, the adjusting and foaming device is provided with a foaming device, a connecting ball body and a shifting device, the bottom of the foaming device is fixedly connected with the bottom of the inner wall of the flotation tank, the connecting ball body is arranged at the center of the top of the foaming device, the shifting device is connected with the top of the surface of the foaming device in a matched manner and is rotatably connected with the connecting ball body, and the top of the shifting device is fixedly connected with the bottom end of the driving rotating shaft.
Preferably, the bubble discharging device is provided with a conical base block, a one-way valve and a bubble hole, the bottom end of the conical base block is fixedly connected with the bottom of the inner wall of the flotation tank, the one-way valve is arranged in the conical base block and is close to the bottom, and the bubble hole is formed in the conical base block and is located on the surface.
Preferably, the toggle device is provided with a conical top cover, a strip inclined plane hole, a shifting piece device and a scraper device, the conical top cover is connected with the foam discharging device in a matched mode, the strip inclined plane hole is formed in the surface of the conical top cover, the shifting piece device is fixed to the top of the surface of the conical top cover and located in the position of the strip inclined plane hole, and the shifting piece device is fixed to the bottom of the conical top cover and located in the edge position.
Preferably, the plectrum device is equipped with plectrum body, arc inclined plane, perforation, the bottom of plectrum body and the surperficial top fixed connection of toper top cap, the arc inclined plane sets up the surface at the plectrum body, the perforation sets up on the surface of plectrum body and is located the position on arc inclined plane.
Preferably, the scraper device is provided with a scraper body, a slope surface and a diversion trench, one end of the scraper body is fixedly connected with the edge position of the bottom of the conical top cover, the slope surface is arranged on one side of the surface of the scraper body, and the diversion trench is arranged on the surface of the scraper body and is located at the slope surface.
(III) advantageous effects
The invention provides adjustable ore flotation equipment. The method has the following beneficial effects:
(one), this ore flotation equipment with adjustable through flotation tank, feeder hopper, discharge gate, air pump, drive pivot, compounding tooth, regulation foaming device, can in time adjust the bubble according to the condition of ore, is convenient for adapt to different ores, has reduced the limitation, has improved work efficiency and performance.
(II), this adjustable ore flotation equipment through going out bubble device, connecting spheroid, toggle arrangement, utilizes the rotation of drive pivot, will drive compounding tooth and toggle arrangement and drive simultaneously and rotate, and then send the even bubble of size to improve the adsorptivity of ore and bubble, help the flotation to the ore, improved flotation efficiency.
(III), this ore flotation equipment with adjustable, through air pump, toper base block, check valve, bubble hole, utilize the bubble hole to communicate with the end of giving vent to anger of air pump, after the air pump sends gas, from bubble hole department formation bubble, and the multiunit bubble hole has increased the bubble volume, and evenly distributed's bubble is favorable to the flotation work of ore.
(IV), this adjustable ore flotation equipment, through the drive pivot, the toper top cap, strip inclined plane hole, the plectrum device, scraper means, after the drive pivot drives the turning device and rotates, strip inclined plane hole has formed the blade, and will the vesicle excision at bubble hole department in the rotation process, and then effectively form the bubble, and the rotational speed of steerable drive pivot, control the diameter of bubble, and then can be according to the circumstances of ore self, cut into the bubble of different size diameters with the air, help bubble and ore intensive contact mix, improve the adsorptivity of ore and bubble, improve the precision of screening, adjust bubble size and speed according to the demand, thereby wash into the air to the flotation demand of different ores, improve the precision and the efficiency of ore screening, scraper means is when rotating simultaneously, can in time scrape the thick liquids that the flotation tank inner wall bottom portion depositned, in order to cause a large amount of piles up to adhere, cause the wasting of resources.
(five), this ore flotation equipment with adjustable, through plectrum body, arc inclined plane, perforation, when the plectrum device rotates under the drive of drive pivot, can in time stir the bubble to make the bubble rise fast under the stirring of plectrum body, a large amount of bubbles gathers when the surface of plectrum device simultaneously, the arc inclined plane can carry out the water conservancy diversion, and partial bubble passes from the perforation, is favorable to bubble evenly distributed, and then helps the flotation of ore.
(VI), this ore flotation equipment with adjustable, through scraper blade body, domatic, guiding gutter, when scraper means rotated, the scraper blade body can be scraped the thick liquids that flotation tank inner wall bottom precipitated to under the water conservancy diversion effect of domatic and guiding gutter, turn the precipitate, and drive upwards the bubble, make the quick evenly distributed of bubble, promote the adhesion of ore, further help the flotation to the ore.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an adjustable ore floatation device according to the present invention;
FIG. 2 is a schematic diagram of the internal structure of the adjustable ore floatation device of the invention;
FIG. 3 is a schematic structural diagram of a foam regulating device in the adjustable ore floatation equipment of the invention;
FIG. 4 is a schematic structural view of a shifting device in the adjustable ore floatation equipment of the invention;
FIG. 5 is a schematic structural diagram of a shifting block device in the adjustable ore floatation equipment;
fig. 6 is a schematic structural diagram of a scraper device in the adjustable ore floatation equipment.
In the figure: 1 flotation tank, 2 feed hoppers, 3 discharge ports, 4 air pumps, 5 driving rotating shafts, 6 mixing teeth, 7 adjusting foaming devices, 71 foam discharging devices, 72 connecting spheres, 73 stirring devices, 711 conical base blocks, 712 one-way valves, 713 bubble holes, 731 conical top covers, 732 arc-shaped inclined planes, 733 plectrum devices, 734 scraper devices, 7331 plectrum bodies, 7332 heat conducting devices, 7333 perforations, 7341 scraper bodies, 7342 sloping surfaces and 7343 diversion trenches.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-6, the present invention provides a technical solution: an adjustable ore flotation device comprises a flotation tank 1, a feed hopper 2, a discharge port 3 and an air pump 4, wherein the feed hopper 2 is arranged on one side of the top of the flotation tank 1, the discharge port 3 is arranged on one side of the top of the surface of the flotation tank 1, and the air pump 4 is arranged in the center of the bottom of the flotation tank 1;
Adjust foaming device 7 and be equipped with out bubble device 71, connect spheroid 72, toggle arrangement 73, the bottom fixed connection of the bottom of play bubble device 71 and flotation tank 1 inner wall, it sets up the top central point at play bubble device 71 to connect spheroid 72, toggle arrangement 73 and go out between the surperficial top of bubble device 71 the cooperation be connected and with be connected and rotate between the spheroid 72 and be connected, toggle arrangement 73's top and the bottom fixed connection of drive pivot 5, utilize the rotation of drive pivot 5, will drive compounding tooth 6 and toggle arrangement 73 and drive simultaneously and rotate, and then send the even bubble of size, and improve the adsorptivity of ore and bubble, help the flotation to the ore, the flotation efficiency is improved.
Go out bubble device 71 and be equipped with toper base block 711, check valve 712, bubble hole 713, the bottom of toper base block 711 and the bottom fixed connection of flotation tank 1 inner wall, check valve 712 sets up in the inside of toper base block 711 and is close to the bottom position, bubble hole 713 is seted up in the inside of toper base block 711 and is located the surface position, utilize bubble hole 713 and the end intercommunication of giving vent to anger of air pump 4, after air pump 4 sends gas, from bubble hole 713 formation bubble, and the bubble hole 713 has increased the bubble volume of multiunit, and evenly distributed's bubble, be favorable to the flotation work of ore.
The shifting device 73 is provided with a conical top cover 731, strip-shaped inclined holes 732, a shifting sheet device 733 and a scraper device 734, the conical top cover 731 is connected with the bubble discharge device 71 in a matched mode, the strip-shaped inclined holes 732 are formed in the surface of the conical top cover 731, the shifting sheet device 733 is fixed to the top of the surface of the conical top cover 731 and located at the positions of the strip-shaped inclined holes 732, the shifting sheet device 733 is fixed to the bottom of the conical top cover 731 and located at the edge position, after the driving rotating shaft 5 drives the shifting device 73 to rotate, the strip-shaped inclined holes 732 form a cutting edge, the bubbles are cut at the bubble holes 713 in the rotating process, bubbles are effectively formed, the rotating speed of the driving rotating shaft 5 can be controlled, the diameters of the bubbles are controlled, air can be cut into bubbles with different diameters according to the conditions of ores, the bubbles are beneficial to fully contact and mix the bubbles with the ores, the adsorbability of the ores and the screening precision is improved, the sizes and the speed of the bubbles are adjusted according to requirements, so that the air is flushed into the flotation requirements of different ores according to the flotation requirements, the precision and the efficiency of the ore screening device 734 can timely scrape a large amount of slurry deposited on the inner wall of the flotation tank 1 when the scraping slurry to cause waste.
The second embodiment:
the poking sheet device 733 is provided with a poking sheet body 7331, an arc-shaped inclined surface 7332 and a perforation 7333, the bottom of the poking sheet body 7331 is fixedly connected with the top of the surface of the conical top cover 731, the arc-shaped inclined surface 7332 is arranged on the surface of the poking sheet body 7331, the perforation 7333 is arranged on the surface of the poking sheet body 7331 and is located at the position of the arc-shaped inclined surface 7332, when the poking sheet device 733 rotates under the driving of the driving rotating shaft 5, bubbles can be timely poked, and the bubbles can rapidly rise under the poking of the poking sheet body 7331, and simultaneously, when a large number of bubbles are gathered on the surface of the poking sheet device 733, the arc-shaped inclined surface 7332 can conduct flow guiding, and part of the bubbles pass through the perforation 7333, which is beneficial to the uniform distribution of the bubbles, and is further beneficial to the flotation of ores.
The third embodiment is as follows:
the scraper device 734 is provided with a scraper body 7341, a slope 7342 and a diversion trench 7343, one end of the scraper body 7341 is fixedly connected with the bottom edge of the conical top cover 731, the slope 7342 is arranged on one side of the surface of the scraper body 7341, the diversion trench 7343 is arranged on the surface of the scraper body 7341 and is located at the position of the slope 7342, when the scraper device 734 rotates, the scraper body 7341 can scrape the slurry precipitated at the bottom of the inner wall of the flotation tank 1, and under the diversion effect of the slope 7342 and the diversion trench 7343, the precipitate is turned over and the bubbles are driven upwards, so that the bubbles are rapidly and uniformly distributed, the adhesion of ores is promoted, and the flotation of the ores is further facilitated.
When the flotation tank is used, the driving rotating shaft 5 is driven by an external motor, the air pump 4 is started to work, ore pulp and a medicament are poured into the flotation tank 1 from the feed hopper 2, the mixing teeth 6 and the shifting device 73 are driven to rotate by the rotation of the driving rotating shaft 5, the bubble holes 713 are communicated with the air outlet end of the air pump 4 to send bubbles with uniform size, the bubbles are formed from the bubble holes 713 after the air pump 4 sends gas, the bubble quantity is increased by the multiple groups of bubble holes 713, the bubbles are uniformly distributed, the flotation work of ores is facilitated, after the driving rotating shaft 5 drives the shifting device 73 to rotate, the strip-shaped inclined plane holes 732 form cutting edges, the bubbles are cut off at the bubble holes 713 in the rotating process to effectively form bubbles, the rotating speed of the driving rotating shaft 5 can be controlled to control the diameters of the bubbles, and further the self conditions of the ores can be controlled, the air is cut into bubbles with different diameters, so that the bubbles can be fully contacted and mixed with ores, the adsorbability of the ores and the bubbles is improved, the screening precision is improved, the size and the speed of the bubbles are adjusted according to requirements, the air is flushed according to the flotation requirements of different ores, the ore screening precision and efficiency are improved, meanwhile, when the scraper device 734 rotates, slurry deposited at the bottom of the inner wall of the flotation tank 1 can be scraped in time, so that a large amount of accumulation and adhesion are avoided, resource waste is caused, when the shifting piece 733 rotates under the driving of the driving rotating shaft 5, the bubbles can be shifted timely, the bubbles can be shifted quickly under the shifting of the shifting piece body 7331, and when a large amount of bubbles are accumulated on the surface of the shifting piece 733, the arc-shaped inclined plane 7332 can conduct flow guiding, and part of the bubbles pass through the perforation 7333, so that the bubbles can be uniformly distributed, further assisting the flotation of the ore, and when the scraper device 734 rotates, the scraper body 7341 can scrape the slurry settled at the bottom of the inner wall of the flotation tank 1, and under the guiding action of the slope 7342 and the guiding groove 7343, the sediment is turned over, and the air bubbles are driven upwards, so that the air bubbles are distributed quickly and uniformly, the adhesion of the ore is promoted, and the flotation of the ore is further facilitated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The utility model provides an ore flotation equipment with adjustable, includes flotation tank (1), feeder hopper (2), discharge gate (3), air pump (4), its characterized in that: the feeding hopper (2) is arranged on one side of the top of the flotation tank (1), the discharge port (3) is arranged on one side of the top of the surface of the flotation tank (1), and the air pump (4) is arranged in the center of the bottom of the flotation tank (1);
the flotation tank is characterized in that a driving rotating shaft (5), mixing teeth (6) and a regulating foaming device (7) are arranged inside the flotation tank (1), the driving rotating shaft (5) is rotatably connected to the top of the inner wall of the flotation tank (1) and is located in the central position, the mixing teeth (6) are fixed on the surface of the driving rotating shaft (5) and are arranged in a vertically staggered mode, the regulating foaming device (7) is arranged in the central position of the bottom of the inner wall of the flotation tank (1), the top of the regulating foaming device (7) is connected with the bottom end of the driving rotating shaft (5) in a matched mode, and the air outlet end of the air pump (4) is connected with the regulating foaming device (7) in a matched mode;
the foam adjusting device (7) is provided with a foam discharging device (71), a connecting ball body (72) and a shifting device (73), the bottom of the foam discharging device (71) is fixedly connected with the bottom of the inner wall of the flotation tank (1), the connecting ball body (72) is arranged at the center of the top of the foam discharging device (71), the shifting device (73) is connected with the top of the surface of the foam discharging device (71) in a matching mode and is rotatably connected with the connecting ball body (72), and the top of the shifting device (73) is fixedly connected with the bottom end of the driving rotating shaft (5);
the bubble discharging device (71) is provided with a conical base block (711), a one-way valve (712) and a bubble hole (713), the bottom end of the conical base block (711) is fixedly connected with the bottom of the inner wall of the flotation tank (1), the one-way valve (712) is arranged inside the conical base block (711) and close to the bottom, and the bubble hole (713) is arranged inside the conical base block (711) and located at the surface position;
the poking device (73) is provided with a conical top cover (731), a strip-shaped inclined surface hole (732), a poking sheet device (733) and a scraper device (734), the conical top cover (731) is connected with the bubble outlet device (71) in a matched mode, the strip-shaped inclined surface hole (732) is formed in the surface of the conical top cover (731), the poking sheet device (733) is fixed to the top of the surface of the conical top cover (731) and located at the position of the strip-shaped inclined surface hole (732), and the poking sheet device (733) is fixed to the bottom of the conical top cover (731) and located at the edge position;
the poking piece device (733) is provided with a poking piece body (7331), an arc-shaped inclined surface (7332) and a through hole (7333), the bottom of the poking piece body (7331) is fixedly connected with the top of the surface of the conical top cover (731), the arc-shaped inclined surface (7332) is arranged on the surface of the poking piece body (7331), and the through hole (7333) is arranged on the surface of the poking piece body (7331) and is positioned at the position of the arc-shaped inclined surface (7332);
the scraper device (734) is provided with a scraper body (7341), a slope surface (7342) and a flow guide groove (7343), one end of the scraper body (7341) is fixedly connected with the bottom edge of the conical top cover (731), the slope surface (7342) is arranged on one side of the surface of the scraper body (7341), and the flow guide groove (7343) is arranged on the surface of the scraper body (7341) and is located at the position of the slope surface (7342).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110840642.2A CN113578532B (en) | 2021-07-25 | 2021-07-25 | Ore flotation equipment with adjustable |
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|---|---|---|---|
| CN202110840642.2A CN113578532B (en) | 2021-07-25 | 2021-07-25 | Ore flotation equipment with adjustable |
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| CN113578532A CN113578532A (en) | 2021-11-02 |
| CN113578532B true CN113578532B (en) | 2022-12-27 |
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| CN114134740B (en) * | 2021-11-23 | 2023-07-25 | 五洲特种纸业(江西)有限公司 | Waste paper deinking regeneration cultural paper and manufacturing method thereof |
| CN114160314B (en) * | 2022-01-17 | 2023-04-25 | 华北理工大学 | Flotation device of mining flotation process |
| CN116441064B (en) * | 2023-06-16 | 2023-08-29 | 山东瑞福锂业有限公司 | Ore flotation machine |
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| CN206509123U (en) * | 2016-08-24 | 2017-09-22 | 石城县伟达机械设备有限公司 | A kind of many bar stirring-type ore floatation machines |
| CN108772206A (en) * | 2018-06-19 | 2018-11-09 | 利辛县风雅颂机电科技有限公司 | A kind of flotation device of high-purity separation concentrate |
| CN108970813A (en) * | 2018-10-24 | 2018-12-11 | 中南大学 | A kind of fluidization coarse flotation equipment and method for floating |
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| CN210815739U (en) * | 2019-09-19 | 2020-06-23 | 西山煤电(集团)有限责任公司 | High-efficient flotation column |
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| CN206509123U (en) * | 2016-08-24 | 2017-09-22 | 石城县伟达机械设备有限公司 | A kind of many bar stirring-type ore floatation machines |
| CN108772206A (en) * | 2018-06-19 | 2018-11-09 | 利辛县风雅颂机电科技有限公司 | A kind of flotation device of high-purity separation concentrate |
| CN108970813A (en) * | 2018-10-24 | 2018-12-11 | 中南大学 | A kind of fluidization coarse flotation equipment and method for floating |
| CN110270437A (en) * | 2019-06-06 | 2019-09-24 | 张斌 | A kind of heavy duty detergent floatation equipment with regulatory function for ore dressing |
| CN210815739U (en) * | 2019-09-19 | 2020-06-23 | 西山煤电(集团)有限责任公司 | High-efficient flotation column |
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