WO2020186591A1 - Dispositif et procédé de séparation de fente peu profonde de milieu lourd de type pulsatoire - Google Patents

Dispositif et procédé de séparation de fente peu profonde de milieu lourd de type pulsatoire Download PDF

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Publication number
WO2020186591A1
WO2020186591A1 PCT/CN2019/083663 CN2019083663W WO2020186591A1 WO 2020186591 A1 WO2020186591 A1 WO 2020186591A1 CN 2019083663 W CN2019083663 W CN 2019083663W WO 2020186591 A1 WO2020186591 A1 WO 2020186591A1
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WIPO (PCT)
Prior art keywords
air
sorting
air chamber
tank body
wheel group
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PCT/CN2019/083663
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English (en)
Chinese (zh)
Inventor
桂夏辉
马子鉴
邢耀文
夏阳超
曹亦俊
刘炯天
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中国矿业大学
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Application filed by 中国矿业大学 filed Critical 中国矿业大学
Publication of WO2020186591A1 publication Critical patent/WO2020186591A1/fr

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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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/36—Devices therefor, other than using centrifugal force
    • B03B5/40—Devices therefor, other than using centrifugal force of trough type

Definitions

  • the invention relates to a pulsating type heavy medium shallow tank sorting device and method, which is especially suitable for a wider material particle size range, and effectively reduces the medium consumption, so that the sorting accuracy of the heavy medium shallow tank is more stable.
  • Slot sorting device and method is especially suitable for a wider material particle size range, and effectively reduces the medium consumption, so that the sorting accuracy of the heavy medium shallow tank is more stable.
  • Dense medium separation is the core separation process of the current coal preparation plant production technology. It is also an important improvement direction for the improvement of the separation accuracy of the heavy medium equipment. At the same time, the medium consumption is the main production cost of the current coal preparation plant. It improves the utilization rate of the heavy medium and reduces Media consumption is an effective way to reduce washing costs.
  • the original dense medium shallow slot separator has the problem of density instability in the medium system.
  • the density of the medium may not reach the set value for a certain period of time. If the density of the medium is too low, a large amount of clean coal will be mixed into the gangue and discharged, resulting in crushing of the shallow groove scraper or blocking the gangue chute.
  • the medium and coal are deposited together, it becomes very difficult to separate the product; if the density of the medium is too high, a large amount of medium coal or gangue will enter the clean coal system, causing the quality of the lump clean coal to decrease.
  • the medium system is unstable and the liquid level in the medium barrel is too low, the coal and medium in the separator will also accumulate, causing the scraper at the bottom of the tank to be crushed.
  • the original heavy-medium shallow groove sorting machine only relies on a single rising medium flow, which cannot sufficiently loosely layer the materials and ensure the stable suspension of the suspension, and affect the accurate layering of light and heavy products.
  • the hydrodynamic effect is the main factor affecting the jig sorting.
  • the speed resistance and the additional thrust produced by the hydrodynamic action together determine the quality of the sorting effect, and the speed resistance and the additional resistance have different relative sizes with the jig stroke and stroke combination. If the combination of stroke and stroke is improper, the bed can't be properly loosened and it is difficult to get a good sorting effect.
  • the jigger also has uneven water supply under the sieve.
  • the design of the top water pipe under the screen is only given to the center of the jig, so that the top water will not be evenly distributed along the whole section of the jig, which will affect the sorting effect.
  • Purpose of the invention Aiming at the shortcomings of the above technology, to provide a pulsating type heavy medium shallow tank sorting device and method with low medium consumption, high sorting accuracy of light and heavy products, and increasing the washing particle size range of washing equipment.
  • the pulsation type heavy medium shallow tank sorting device of the present invention includes a sorting tank body.
  • the upper part of the sorting tank body is provided with a damper transmission device.
  • the bottom of the sorting tank body is provided with multiple air chambers.
  • the body is provided with a guide part, the guide part is connected with a transmission part arranged at the end of the sorting tank body through a chain, and the bottom of the sorting tank body is provided with a plurality of funnel parts;
  • the separation tank body has a rectangular parallelepiped structure.
  • the two sides of the separation tank body are respectively provided with a raw coal inlet and a clean coal overflow weir.
  • a horizontal flow inlet is provided below the raw coal inlet, and is located below the transmission part of the end of the separation tank body. With gangue discharge port;
  • the guide part includes a guide rail arranged around the sorting tank body to match the circular motion track of the chain, and drive the scraper on the chain to perform circular movement, thereby driving the scraper to perform circular movement.
  • It also includes a head wheel group, a follow-up wheel group and a tail wheel group horizontally arranged above the sorting tank.
  • the head wheel group is arranged above the gangue discharge port, and the follow-up wheel group and the tail wheel group are arranged under the air valve transmission device.
  • the two ends of the head wheel group, the following wheel group and the tail wheel group are respectively equipped with sprockets, and the sprockets of the head wheel group, the following wheel group and the tail wheel group are respectively equipped with two chains, and there is a space between the two ends of the chain
  • There is a scraper through the connecting plate the lower end of the chain is embedded in the slide groove of the guide rail, the chain moves in the guide rail, and drives the scraper on the chain to move in a circular motion.
  • the sinker sinking to the bottom of the sorting tank moves through the curve of the scraper. Scrape the bottom sediment, lift the bottom sediment to the gangue discharge port at the end of the tank, and discharge the gangue;
  • the transmission part includes a motor, a reducer, and a V-belt, wherein the motor is connected to the reducer through the V-belt, and the reducer is connected to the head wheel assembly to provide power for the curved movement of the guiding part;
  • the air chamber has a hollow structure, the lower side of the air chamber is provided with an air chamber lower hole, the upper side of the air chamber is provided with an air chamber upper hole, and the top of the air chamber is provided with a plurality of air chamber top holes arranged side by side, wherein the air chamber upper hole It is connected with the air valve transmission device through the pipeline, the lower hole of the air chamber is connected with the funnel part through the pipeline, and the top hole of the air chamber is set vertically;
  • the damper transmission device is a compressed air generating device.
  • a pulsating type heavy-medium shallow tank sorting method the steps are:
  • the device feeds compressed air with periodically changing air volume to the upper holes of the air chambers of all air chambers. After the compressed air and the medium flow are mixed in the air chamber, the intermittent compressed air body passed through the air valve drive device drives the medium flow from The top hole of the air chamber makes a vertical alternating motion.
  • the compressed air medium flow vertically upwards, the air volume decreases, the compressed air medium flow vertically downwards, the air volume periodically changes, and the compressed air medium flow periodically increases or Falling, horizontal flow and vertical alternating pulse movement of the medium flow achieve sufficient dispersion and stratification of the raw coal, and the separation according to density is beneficial to the floating of the clean coal.
  • the separated clean coal overflows from the clean coal along the horizontal flow direction
  • the gangue is discharged from the weir, and the sorted gangue is lifted to the end of the sorting tank by two continuously movable scrapers, and discharged through the gangue discharge port, forming the whole process of separating clean coal and gangue.
  • the invention is equipped with an air chamber, and the pulsating flow of the air chamber strengthens the separation effect. Compared with the single upflow of the traditional shallow trough, the raw coal is more fully dispersed and stratified, and the density is more accurately stratified. Smaller particle size materials can be effectively sorted, so the lower limit of shallow slot sorting is reduced, and the sorting accuracy of shallow slot sorting machine is improved. At the same time, the heavy medium fed into the shallow tank can maintain a stable suspension state, increase the utilization rate of the medium, and reduce the medium consumption.
  • Figure 1 is a schematic diagram of the structure of a pulsating type heavy medium shallow tank sorting device of the present invention
  • Figure 2 is a plan view of the pulsating type heavy medium shallow groove sorting device of the present invention.
  • Figure 3 is a top view of the pulsating type heavy medium shallow tank sorting device of the present invention.
  • Figure 4 is a schematic diagram of the air chamber structure of the present invention.
  • the pulsation type heavy medium shallow tank sorting device of the present invention is characterized in that it includes a sorting tank body 1, and a damper transmission device 5 is arranged above the sorting tank body 1.
  • the bottom of the tank body 1 is provided with a plurality of air chambers 6, and the sorting tank body 1 is provided with a guide part 2, and the guide part 2 is connected with a transmission part 3 provided at the end of the sorting tank body 1 through a chain 10.
  • a plurality of funnel parts 4 are provided at the bottom of the tank 1;
  • the separation tank body 1 has a rectangular parallelepiped structure. Both sides of the separation tank body 1 are provided with a raw coal inlet 18 and a clean coal overflow weir 19, respectively. Below the raw coal inlet 18, a horizontal inflow inlet 20 is provided. A gangue discharge port 11 is provided below the end transmission part 3;
  • the guide portion 2 includes a guide rail 13 arranged around the sorting tank 1 to match the circular motion track of the chain 10 and drive the scraper on the chain 10 to perform circular movement, thereby driving the scraper to perform circular movement.
  • the head wheel group 7, the follower wheel group 8 and the tail wheel group 9 are respectively provided with sprockets at both ends.
  • the sprockets of the head wheel group 7, the follower wheel group 8 and the tail wheel group 9 Two chains 10 are respectively provided on the upper part.
  • the upper interval between the two ends of the chain 10 is provided with a scraper 12 through the connecting plate 14.
  • the lower end of the chain 10 is embedded in the guide rail chute, and the chain 10 moves in the guide rail 13 to drive the chain 10
  • the scraper moves in a circular motion, and the sediment sinking to the bottom of the sorting tank 1 scrapes the bottom sediment through the curved movement of the scraper 12, and lifts the bottom sediment to the gangue discharge port at the end of the tank to discharge the gangue;
  • the transmission part 3 includes a motor 15, a reducer 17, and a V-belt 16.
  • the motor 15 is connected to the reducer 17 through the V-belt 16, and the reducer 17 is connected to the head wheel set 7, which is Guiding part 2 provides power for curved movement;
  • the air chamber 6 is a hollow structure, the lower side of the air chamber 6 is provided with an air chamber lower hole 22, the upper side of the air chamber 6 is provided with an air chamber upper hole 21, and the top of the air chamber 6 is provided with multiple side-by-side
  • the top hole 23 of the air chamber is provided, wherein the upper hole 21 of the air chamber is connected with the air valve transmission device 5 through a pipeline, the lower hole 22 of the air chamber is connected with the funnel part 4 through a pipeline, and the top hole 23 of the air chamber is vertically arranged;
  • the damper actuator 5 is a compressed air generating device.
  • a pulsating type heavy-medium shallow tank sorting method the steps are:
  • the medium flow through the air valve transmission device 5, feeds compressed air whose air volume changes periodically to the upper holes 21 of the air chambers 6 of the air chamber. After the compressed air and the medium flow are mixed in the air chamber 6, they pass through the air valve transmission device 5
  • the intermittent compressed air body is introduced to push the medium flow from the top hole 23 of the air chamber to make a vertical alternating motion. When the air volume increases, the compressed air medium flow vertically upwards, the air volume decreases, and the compressed air medium flow vertically downwards.
  • the compressed air medium flow will periodically rise or fall.
  • the horizontal flow and the medium flow of vertical alternating pulse motion realize the sufficient dispersion and stratification of the raw coal, and the separation according to density is beneficial to the floating of the clean coal.
  • the cleaned coal is discharged from the cleaned coal overflow weir 19 along the horizontal flow direction, and the sorted gangue is lifted to the end of the sorting tank 1 through the two continuously movable scrapers 12, and discharged through the gangue discharge port 11. , Into the entire process of separation and separation of clean coal and gangue.
  • raw coal is fed from one side of the tank body, the raw coal and the medium suspension are mixed, and then sorted through the tank body. Under the combined action of horizontal flow and pulsating water flow, the density is sorted, and the float is transported by the horizontal flow. When the overflow weir is discharged, the sediment at the bottom of the tank is lifted to the head of the tank through the curved movement of the scraper and falls into the gangue chute.
  • the heavy medium is fed in by two parts, and the other is fed from the funnel at the bottom of the tank, which accounts for about 10% to 20% of the heavy medium.
  • This way forms a pulsating medium flow, which promotes the suspension of the suspension and is beneficial to
  • the clean coal and the suspension are fully mixed and stratified according to the density to achieve the floating of the clean coal; the other part is evenly distributed along the full width of the feed opening, accounting for about 80% to 90% of the total medium volume, resulting in a horizontal medium
  • the floating clean coal flows uniformly to the discharge port under the promotion of the horizontal medium flow, and discharges from the separator along with the medium flow to complete the separation of the raw coal.
  • the present invention changes the original single upward flow, and alternately feeds compressed air through the air chamber at the bottom to form a pulsating medium flow. Under the action of the pulsating flow, it can make The properties of the suspension are more stable, which solves the problem of uneven distribution of the density of the medium system. At the same time, under the combined action of heavy medium and hydrodynamics, it can realize the separation of raw coal together, further improve the separation accuracy of the equipment, and improve the recovery of clean coal. rate. Experiments show that under the same sorting situation, the medium consumption will be lower, the sorting accuracy of the sorting machine is higher, and the lower limit of sorting is also reduced.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

La présente invention concerne un dispositif de séparation de fente peu profonde de milieu lourd de type pulsatoire, comprenant un corps de fente de séparation (1), une partie de guidage (2), une partie de transmission (3), une partie d'entonnoir (4), un dispositif de transmission de soupape d'air (5) et une chambre d'air (6). Le dispositif de séparation de fente peu profonde de milieu lourd de type pulsatoire améliore l'effet de séparation au moyen d'un écoulement pulsatoire de la chambre d'air, disperse et stratifie complètement le charbon tout-venant, et stratifie avec précision selon la densité, étant capable de séparer efficacement des matériaux d'un faible niveau de granularité, de réduire la limite inférieure de séparation de fente peu profonde, et d'améliorer la précision de séparation de séparation de fente peu profonde. De plus, le milieu lourd introduit dans la fente peu profonde peut maintenir un état de suspension stable, améliorer le taux d'utilisation du milieu, et réduire la consommation moyenne. De plus, l'invention concerne en outre un procédé de séparation utilisant le dispositif de séparation de fente peu profonde de milieu lourd de type pulsatoire.
PCT/CN2019/083663 2019-03-15 2019-04-22 Dispositif et procédé de séparation de fente peu profonde de milieu lourd de type pulsatoire WO2020186591A1 (fr)

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CN201910196212.4A CN109731670B (zh) 2019-03-15 2019-03-15 一种脉动型重介浅槽分选装置及方法
CN201910196212.4 2019-03-15

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WO2020186591A1 true WO2020186591A1 (fr) 2020-09-24

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Publication number Priority date Publication date Assignee Title
CN110479474B (zh) * 2019-09-17 2024-03-08 中国矿业大学 一种倾斜通道强化重介浅槽分选装置
CN110882915A (zh) * 2019-12-21 2020-03-17 嘉兴新博信息科技有限公司 一种低磨损块矿重力选矿分选机

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WO2003024603A1 (fr) * 2001-09-18 2003-03-27 Australian Plastics Re-Processing Pty Ltd Recuperation de matiere plastique a partir de supports de stockage optiques
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CN108906309A (zh) * 2018-09-04 2018-11-30 天津美腾科技有限公司 重介浅槽分选系统

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FR2751566B1 (fr) * 1996-07-26 1998-10-23 Riberry Georges Installation pour separer en continu des materiaux en vrac plus lourds que l'eau et des materiaux en vrac de densite inferieure a celle de l'eau ou voisine de celle-ci
DE102013004417B4 (de) * 2013-03-15 2016-06-30 BEAR Mühlen & Behälter GmbH Verfahren und Anlage zur Sedimentation von Schwerteilen aus Kakaobohnen

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003024603A1 (fr) * 2001-09-18 2003-03-27 Australian Plastics Re-Processing Pty Ltd Recuperation de matiere plastique a partir de supports de stockage optiques
US20120031819A1 (en) * 2006-11-15 2012-02-09 Construction Equipment Company Material separator systems
CN204866513U (zh) * 2015-06-15 2015-12-16 吕江良 一种空气重介质流化床分选机
CN206104098U (zh) * 2016-09-30 2017-04-19 沈阳中矿科技有限公司 一种二产品浅槽重介分选机
CN207013125U (zh) * 2017-03-14 2018-02-16 芬雷选煤工程技术(北京)有限公司 一种改进的浅槽分选机
CN108906309A (zh) * 2018-09-04 2018-11-30 天津美腾科技有限公司 重介浅槽分选系统

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