• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to the field of coal slime fl oatation treatment, in particular to a column fl oatation machine with jet fl ow air suction and stirring effects. The column fl oatation machine consists of a fl oatation column, two groups of jet fl ow stirring 5 mechanisms, a spraying device and a bubble generating device. The fl oatation column is divided into an ore concentrate enriching region A, an ore concentrate capturing region B, an ore pulp diffusion region C, an ore pulp scavenging region D and a tailing collecting region E from top to bottom. The jet fl ow stirring mechanisms are mounted in the fl oatation column. The jet fl ow stirring mechanisms are integrally arranged in the 10 ore concentrate capturing region B. The jet fl ow stirring mechanism includes an upper impeller, a lower impeller, a sleeve, a driving shaft and a variable-frequency motor. Floatation feeding materials realize solid-gas-liquid three-phase mixing, preliminary mineralization and uniform distribution on a whole cross section of the fl oatation column under the effect of the jet fl ow stirring mechanisms. The bubble generating 15 device is arranged at a lower part of the fl oatation column. Unmineralized ore particles and bubbles generate reverse fl ow collision, and scavenging operation is performed. The spraying device is designed above the fl oatation column and is configured to implement spraying operation. Foam ore concentrates flow out from a collecting through, and tailing pulp flows out from a tailing opening. 20
    公开号:NL2024996A
    申请号:NL2024996
    申请日:2020-02-26
    公开日:2021-05-11
    发明作者:Zhou Wei；Zhu Jinbo；Min Fanfei；Liu Lingyun
    申请人:Univ Anhui Sci & Technology；
    IPC主号:
    专利说明:

    P100398NL00 'NL2024996 COLUMN FLOATATION MACHINE WITH JET FLOW AIR SUCTION AND STIRRING EFFECTS
    BACKGROUND Technical Field The invention relates to the field of coal slime floatation treatment in a coal preparation plant, in particular to a column floatation machine with jet flow air suction and stirring effects. Related Art A floatation method is an important interfacial separation method, is generally used in separation of -0.5 mm coal slime, and is a unique effective separation method of -0.1 mm coal slime. Floatation machines are in various types, and main differences are mainly in aspects of an inflation mode, a structure of an inflation stirring device and the like, so that according to mostly widely used classification methods at present, the floatation machines are divided into two major types: mechanical stirring type floatation machines and non-mechanical stirring type floatation machines according to different inflation and stirring modes. For the mechanical stirring type floatation machine, reference may be made to a Chinese patent with a publication patent number being CN201711220U and a name being “Mechanical Stirring Type Floatation Machine”, and bubble suction and separation processes are completed by using stirring of a mechanical stirrer . The non-mechanical stirring type floatation machine is also called as an inflatable type floatation machine, and is provided with a pneumatic structure for forced diffusion of air through micropores, and reference may be made to a Chinese patent with a publication patent number being CN2671690 and a name being “Column Type Floatation Machine”. Jet flow type floatation machines for generating forced eddy current in a jet eddy flow measure to cut air and enabling air to be separated after dissolution, such as FIC (A) series floatation machines and XPM jet eddy flow type floatation machines, exist. The non-mechanical stirring type floatation machine is not provided with a stirring mechanism, and uses a pump to provide energy for ore pulp, so that sufficient air is sucked through ore pulp jet flow and collision dispersion.
    1. Mechanical stirring type floatation machine
    P100398NL00 'NL2024996 A stirring mechanism is a key mechanism for the floatation machine to complete inflation and bubble and ore pulp mixing, and work performance of the stirring mechanism directly influences work effects of the floatation machine.
    The stirring mechanism of the mechanical stirring type floatation machine is a core component of the floatation machine, and consists of a stator, a sleeve, a bearing seat, an air inlet pipe, an air inlet pipe regulating cover, an axial clearance regulating sheet, an impeller, a hollow shaft and the like.
    Work principles of the mechanical stirring mechanisms are similar.
    By taking an XJM type floatation machine in our country as an example, when the impeller rotates, the inside of an impeller cover is a negative pressure region, and air is brought in through being carried by ore pulp (primary inflation operation). When the ore pulp is jetted to a trough bottom, air is sucked from a seam at an outer edge of the impeller from a back side of the impeller to complete secondary inflation operation.
    That is, negative pressure regions may be formed on both a front side and the back side of the impeller.
    The impeller may use a self-suction type impeller when being used in a shallow through floatation machine, but the impeller is changed into a pneumatic impeller when being used in a deep through floatation machine, low-pressure air is introduced to the back side of the impeller from the hollow shaft, and meanwhile, a self-suction type state can still be maintained.
    The inflatable (pneumatic) type floatation machine is not provided with a mechanical stirrer and a transmission component, and ore pulp inflation depends on external air compression.
    A most typical component is a floatation column.
    A structure and a principle of an eddy-flow floatation column are shown in FIG. 2. The eddy-flow floatation column includes three parts: a floatation section, an eddy-flow section and a bubble generating device.
    The floatation section 1s divided into two regions: a capturing region (also called as a mineralization region) between the eddy-flow section and a feeding point, and a foam region (also called as a concentration region) between the feeding point and an overflow opening.
    A water flushing device and a foam clean coal collecting trough are arranged on a top of the floatation section.
    An ore feeding pipe is positioned in a position about 1/3 from a column top.
    Finally, tailings are discharged from a bottom flow opening of a cyclone.
    The bubble generating device is positioned outside the column, and 1s connected with the eddy-flow section in a tangential direction.
    An air inlet pipe and a foaming agent adding pipe are arranged on the bubble generating device.
    Pressed air forms tiny bubbles through a purpose-made inflator (bubble generating device) soaked in the ore pulp.
    P100398NL00 ° NL2024996
    3. Jet type floatation machine The jet type floatation machine is not provided with a mechanical stirrer. An inflation process of the jet type floatation machine is mainly realized by an inflation stirring mechanism. Ore pulp pressurized by a sand pump is spirally jetted out at a high speed from a spray nozzle provided with a spiral blade, a negative pressure is generated in a mixing chamber, and air is sucked in, is crushed into small bubbles through high-speed jet flow, and is jetted to a trough bottom along with the ore pulp. In an ore pulp pressurization process, the air solubility is increased. During jetting, the pressure of the ore pulp is reduced through the negative pressure of the mixing chamber, the dissolved air is separated from surfaces of hydrophobic coal particles in a micro bubble form, and upward buoyancy and bubble attaching force of the coal particles (particularly coarse particles) are enhanced. The coal particles not floating out may be separated again through ore pulp circulation by the sand pump. Finding novel floatation equipment with a more reasonable and practical structure for achieving better bubble mineralization and floatation effects on the whole-size-range coal slime below -0.5 mm is a technical problem urgently to be solved in the field in recent years.
    SUMMARY The invention is directed to provide coal slime floatation equipment combining good inflation performance and stirring performance, a column floatation machine with jet flow air suction and stirring effects. The column floatation machine with the jet flow air suction and stirring effects consists of a floatation column, two groups of jet flow stirring mechanisms, a spraying device and a bubble generating device. The floatation column is divided into an ore concentrate enriching region A, an ore concentrate capturing region B, an ore pulp diffusion region C, an ore pulp scavenging region D and a tailing collecting region E from top to bottom according to characteristics of a floatation process . The jet flow stirring mechanisms are integrally arranged in the ore concentrate capturing region B, and an action region of a lower impeller of the jet flow stirring mechanism is the ore pulp diffusion region C. Floatation feeding materials are pumped into the jet flow stirring mechanisms through a pump. Pressurized ore pulp is sprayed out from a spray nozzle at a speed being higher than 9 m / s. A negative pressure is formed in a mixing chamber. Air is sucked in, and is entrained and crushed into small bubbles to be impacted together with the ore pulp to an upper impeller of the jet flow stirring mechanism. In an impact process,
    P100398NL00 * NL2024996 bubble is further crushed, and uniform dispersion of bubbles in the ore pulp has been realized. The ore pulp realizing solid-gas-liquid three-phase mixing flows downwards along a sleeve of the jet flow stirring mechanism, and collision contact between ore particles and the bubbles is preliminary realized in a flowing process. The ore pulp flows out from a lower part outlet of the jet flow stirring mechanism. The lower part outlet of the jet flow stirring mechanism is provided with the lower impeller achieving a stirring effect. The lower impeller transversely throws out the ore pulp along the column, so that the ore pulp property uniformity of a whole cross section of the column is realized, and mineralized bubbles ascend along the whole cross section of the column. Unmineralized ore particles move downwards. The bubble generating device is arranged at a lower part of a tubular section of the floatation column. The bubbles generated by the bubble generating device move upwards along the cross section of the column. Unmineralized ore particles and the bubbles generate reverse flow collision in the ore pulp scavenging region D, and “lost” ore concentrates are further captured. The spraying device is designed above the column and is configured to implement spraying operation, and a secondary enriching effect is enhanced. Overflowing foam ore concentrates flow out from a collecting trough. A power source for impeller rotation in the jet flow stirring mechanism is from a matched motor. Tailing pulp flows out from a tailing opening.
    In order to achieve the objective, the invention uses the following technical scheme: A column floatation machine with jet flow air suction and stirring effects at least includes a floatation column, wherein the floatation column consists of an upper part tubular section and a lower part conical section, and is divided into an ore concentrate enriching region, an ore concentrate capturing region, an ore pulp diffusion region, an ore pulp scavenging region and a tailing collecting region from top to bottom; jet flow stirring mechanisms are arranged in the ore concentration capturing region, the jet flow stirring mechanism includes an upper impeller, a sleeve, a driving shaft, a lower impeller and a variable-frequency motor; an impeller of the upper impeller uses a straight blade; the upper impeller is right against a main pipeline of an outlet of the mixing chamber; an annular spray nozzle is mounted in the mixing chamber; after being pressurized by a feeding pump, floatation feeding materials in pulp blending equipment are sprayed out from the spray nozzle at a certain speed, a negative pressure is formed in the mixing chamber; the driving shaft is arranged in the sleeve in a plumb bob manner; the driving shaft is connected with the variable-frequency motor of an external power source, and is driven to rotate by the
    P100398NL00 ° NL2024996 variable-frequency motor; the lower impeller in symmetrical arrangement is fixedly connected to a position of a lower section shaft body of the driving shaft; the lower impeller is flush with an outlet of a lower bottom end of the sleeve; a bubble generating device 1s arranged at a lower part of the tubular section of the floatation column; air outlet holes are designed in the bubble generating device; the bubble generating device is connected with a pneumatic pump and a cleaning water pump through pipelines; a spraying device is designed on a top of the tubular section of the floatation column; floatation ore concentrates subjected to spraying and antifoaming overflow to an ore concentrate collecting trough; and the conical section of the floatation column is connected with a tailing opening.
    A lower impeller stirring region of the jet flow stirring mechanism is the ore pulp diffusion region. A region between the bubble generating device and the tailing opening is the tailing collecting region. A region between the ore pulp diffusion region and the tailing collecting region is the ore pulp scavenging region. An integrally located region of the jet flow stirring mechanisms is the ore concentrate capturing region. A rest floatation column region at an upper part of the ore concentrate capturing region is the ore concentrate enriching region.
    The invention has the following beneficial effects: 1) on the basis of combining advantages of a non-mechanical stirring type floatation machine and a mechanical stirring type floatation machine, in a unique arrangement mode, the jet flow stirring mechanisms are arranged in an upper part region of the floatation column, and the bubble generating device is designed at the lower part of the floatation column. By sufficiently considering the characteristics of the floatation process, a dynamic floatation flow field and a static flow field are combined. Floatation feeding material ore pulp is sprayed out from the spray nozzle at a certain speed. The negative pressure is formed in the mixing chamber. Air is sucked in. Air and the ore pulp are impacted together to the upper impellers of the jet flow stirring mechanisms. Through collision, air forms cavities in the ore pulp, and the bubbles are further formed. The ore pulp realizing solid-gas-liquid three-phase mixing is conveyed downwards along the sleeve arranged outside the jet flow stirring mechanism. In a conveying process in the sleeve, the bubbles collide with and are adhered to the ore particles, and mineralization is preliminary realized. The lower impeller of the jet flow stirring mechanism transversely throws out the ore pulp along the column. Preliminarily mineralized bubbles are uniformly distributed and ascend on the whole cross section of the column, and unmineralized ore particles move downwards. The
    P100398NL00 ° NL2024996 bubbles generated by the bubble generating device arranged at the bottom move upwards. The unmineralized ore particles and the bubbles generate reverse flow collision in the ore pulp scavenging region D, the “lost” ore concentrates are further captured, and the ore concentrate collection efficiency is improved. The bubble generating device 1s connected with the pneumatic pump, and is also connected with the cleaning water pump, and the bubble generating device is regularly cleaned, so that the blockage of the air outlet holes is prevented. The spraying device is designed above the column and is configured to implement spraying operation, so that the secondary enriching effect is reinforced, and the ore concentrate quality is ensured. The overflowing foam ore concentrates are collected by the collecting trough.
    LETTER DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a device of the invention. FIG. 2 is a schematic diagram (top view) of arrangement of duplex jet flow stirring mechanisms. Corresponding relationships between structures and regions in FIG. 1 and component names of the invention are as follows: A-ore concentrate enriching region; B-ore concentrate capturing region; C-ore pulp diffusion region; D-ore pulp scavenging region; E-tailing collecting region; 1-pulp blending equipment; 2-feeding pump; 3-spray nozzle; 4-mixing chamber; 5-jet flow stirring mechanism; Sl-upper impeller; 52-lower impeller; 53 sleeve; 54-driving shaft, 55-variable-frequency motor; 6-spraying device; 7-bubble generating device; 8-air outlet hole; 9-collecting trough; 10-floatation column; 11-tailing opening; 12-pneumatic pump; and 13-cleaning water pump.
    DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the present invention with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative effects shall fall within the protection scope of the present invention. Floatation feeding materials from a main plant building of a coal preparation plant enter pulp blending equipment (1) to be subjected to pulp blending and quality improvement,
    P100398NL00 / NL2024996 and then, the materials are conveyed to a spray nozzle (3) by a feeding pump (2) through a pipeline, and are sprayed out from the spray nozzle (3) at a certain speed.
    Through a jet flow entrainment effect, a negative pressure is formed in a mixing chamber (4). Air is sucked in, and the air and ore pulp are impacted together to upper impellers (51) of jet flow stirring mechanisms (5) arranged in an ore concentrate capturing region B.
    Through collision, air forms cavities in the ore pulp, and bubbles are further formed.
    The ore pulp realizing solid-gas-liquid three-phase mixing is conveyed downwards along a sleeve (53) arranged outside the jet flow stirring mechanism (5). In a conveying process in the sleeve (53), the bubbles collide with and are adhered to ore particles, and mineralization is preliminary realized.
    The upper impeller (51) of the jet flow stirring mechanism (5) is fixedly connected to a driving shaft (54). The driving shaft (54) is connected with a variable-frequency motor (55) or an external power source, and is driven to rotate by the variable-frequency motor (55). A lower impeller (52) in symmetrical arrangement is also tixedly connected to a position of a lower section shaft body of the driving shaft.
    The lower impeller (52) is flush with a lower bottom end of the sleeve (53). The lower impeller (52) transversely throws out the ore pulp along a floatation column (10) to realize sutficient action in an ore pulp diffusion region.
    The uniform distribution and ascending of mineralized bubbles on a whole cross section of the floatation column (10) are realized.
    Unmineralized ore particles move downwards.
    Bubbles generated by a bubble generating device (7) arranged at the bottom move upwards.
    The unmineralized ore particles and the bubbles generate reverse flow collision in an ore pulp scavenging region D, “lost” ore concentrates are further captured, and the ore concentrate collection efficiency is improved.
    The bubble generating device (7) is connected with a pneumatic pump (12), and is also connected with a cleaning water pump (13), and the bubble generating device is regularly cleaned, so that the blockage of air outlet holes is prevented.
    The ore pulp carries the ore concentrates to float upwards to an ore concentrate enriching region A in the whole cross section of the floatation column (10) by self buoyancy of the mineralized bubbles.
    A spraying device (6) is arranged above the floatation column (10). The spraying device (6) continuously spray water mist droplets to achieve a secondary enriching effect on a foam enriching layer, and the ore concentrate quality is ensured.
    Overflowing foam ore concentrates are recovered by a collecting through, and tailing pulp flows out from a tailing opening (11). Based on the above, according to a structure and a work mechanism of the invention, process characteristics of floatation operation are sufficiently considered.
    The
    P100398NL00 ° NL2024996 structure composition is reasonable.
    The equipment treatment capacity is great.
    Static floatation and dynamic floatation are combined.
    The floatation efficiency is high.
    The invention adapts to the whole-size-range floatation of coal slime below -0.5 mm.
    The production cost is reduced.
    The benefits of enterprises are improved.
    权利要求:
    Claims (2)
    [1]
    A column blotting machine with jet suction and agitation, at least consisting of a flotation column (10), characterized in that the flotation column (10) consists of an upper cylindrical section and a lower conical section, and is divided from top to bottom into a concentrate enrichment area ( A), a concentrate catching area (B), a pulp diffusion area (C), a pulp sweeping area (D) and a residue collection area (E), and the concentrate catching area (B) is provided with a jet agitator (5), and the jet agitator (5) consists of an upper impeller (51), a sleeve (53), a drive shaft (54), a lower impeller (52) and a frequency conversion motor (55) and straight blades are used on the impeller of the upper impeller (51) and the upper impeller (51 ) is facing the main pipe of the mixing chamber outlet (4) and an annular nozzle (3) is installed in the mixing chamber (4). After the flotation feed in the mixing equipment (1) has been pressurized by the feed pump (2), it is ejected from the nozzle (3) at a certain speed to form a negative pressure in the mixing chamber (4). The drive shaft lead hammer (54) is mounted in the sleeve (53), and the drive shaft (54) is connected to a frequency conversion motor (55) from an external power source and is driven to rotate by the frequency conversion motor (55). The lower shaft of the drive shaft (54) is fixed with a lower impeller (52) and the lower impeller (52) is flush with the lower end of the sleeve (53). The lower part of the cylindrical section of the flotation column (10) is provided with a bubble generating device (7) and the bubble generating device (7) is provided with air outlets (8) and the bubble generating device (7) is connected to the air pressure pump (12) ) and the cleaning water pump (13) through a pipeline. The upper part of the cylindrical section of the flotation column (10) is equipped with a spraying device (6) and the buoyant concentrate, after the spray foam overflows into the concentrate collection tank (9) and the conical part of the flotation column are connected to the residual nozzle ( 11).
    [2]
    A column blotting machine with jet suction and agitation according to claim 1, characterized in that the stir area of the lower impeller of the jet agitator (5) is the pulp diffusion area (C) and the area between the bubble generating device (7) and the tailings mouth (11) the residue collection area (E), and the area between the pulp diffusion area (C) and the residue collection area (E) is the pulp sweep area (D) and the entire area of the jet agitator (5) is the concentrate catch area (B) and the remaining flotation column area in the upper part of the concentrate capture area is the concentrate enrichment area (A).
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    同族专利:
    公开号 | 公开日
    NL2024996B1|2021-09-21|
    CN110756338A|2020-02-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5182014A|1990-05-30|1993-01-26|Goodman Laurence R|Method and apparatus for increasing flotation cell recovery and grade of complex copper-containing ores|
    CN2671690Y|2003-12-03|2005-01-19|刘廷昌|Column type floatation machine|
    CN201711220U|2010-07-09|2011-01-19|太原市兴慎工贸有限公司|Mechanical stirring type flotation machine|
    CN105880035B|2016-04-11|2017-11-07|安徽理工大学|It is a kind of possess from size mixing and self-defoaming function ore pulp driving stirring-type floatation equipment|
    CN205628312U|2016-04-26|2016-10-12|安徽理工大学|Utilize rotatory jet mixing low energy consumption flotation equipment of ore pulp driven|
    CN2102801U|1991-10-30|1992-04-29|丁文祥|Machinery mix flotater|
    CN102284371B|2011-06-22|2013-01-09|李冠东|Column combined reinforced high-efficiency flotation method and flotation equipment thereof|
    EP2623189A1|2012-02-06|2013-08-07|Siemens Aktiengesellschaft|Gassing device for a flotation device, flotation device and method for swapping at least one gas discharge unit of a gassing device|
    CN205095966U|2015-10-29|2016-03-23|安徽理工大学|Bilobed wheel agitating unit|
    CN205926036U|2016-07-25|2017-02-08|徐州市亿龙机电科技有限公司|Spray high -efficient flotation column in advance|
    CN209020582U|2018-10-24|2019-06-25|中南大学|A kind of fluidization coarse flotation equipment|
    CN109939839A|2019-04-29|2019-06-28|中国矿业大学|A kind of fluid cooperative reinforcing floatation separator and method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN201910848617.1A|CN110756338A|2019-09-09|2019-09-09|Cylinder flotation machine with jet flow air suction and stirring functions|
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