WO2008067733A1 - Procédé de flottation de type cyclone pour suspension et colonne de flottation de type cyclone et dispositif correspondant - Google Patents

Procédé de flottation de type cyclone pour suspension et colonne de flottation de type cyclone et dispositif correspondant Download PDF

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Publication number
WO2008067733A1
WO2008067733A1 PCT/CN2007/003493 CN2007003493W WO2008067733A1 WO 2008067733 A1 WO2008067733 A1 WO 2008067733A1 CN 2007003493 W CN2007003493 W CN 2007003493W WO 2008067733 A1 WO2008067733 A1 WO 2008067733A1
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WIPO (PCT)
Prior art keywords
slurry
flotation
tank
concentrate
sensor
Prior art date
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PCT/CN2007/003493
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English (en)
Chinese (zh)
Inventor
Bin Li
Original Assignee
Bin Li
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Publication of WO2008067733A1 publication Critical patent/WO2008067733A1/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
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1418—Flotation machines using centrifugal forces
    • 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
    • B03D1/02—Froth-flotation processes
    • B03D1/028—Control and monitoring of flotation processes; computer models therefor
    • 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
    • B03D1/1412—Flotation machines with baffles, e.g. at the wall for redirecting settling solids

Definitions

  • the invention belongs to the field of mineral flotation technology, and relates to a mineral flotation method, in particular to a cyclone flotation method.
  • the invention also relates to a cyclone flotation column and a flotation unit for use in the method.
  • the birth of 02252728. 1 makes cyclonic flotation technology widely used in actual flotation applications.
  • the cyclone flotation machine has a swirling jet suction foamer with a spiral baffle and a tapered nozzle.
  • the advantages are as follows: (1) a large amount of gas, small bubbles, High gas capacity.
  • the conventional conventional flotation machine has a gas capacity of 15 to 25%, and the swirling jet flotation machine has a gas capacity of 35 to 40%.
  • Low energy consumption is 50 to 60% of the energy consumption of a conventional flotation machine.
  • the field of using the above-described high-efficiency cyclone flotation flotation machine in the prior art is not extensive enough, and is basically limited to the treatment of waste water, and is less used in the process of mineral flotation separation.
  • the cyclone flotation machine has a large amount of aeration and low energy consumption, in actual production, especially when it is used to treat various kinds of pulp, it does not show its outstanding effect. The recovery rate of concentrate is far from expected. Effect.
  • the biggest difference between the flotation of slurry and the flotation of wastewater is that the parameters of the slurry vary during the flotation process.
  • the impurities in the wastewater are relatively small, and the parameters of the wastewater during the flotation process fluctuate little.
  • various parameters may change at any time during the flotation process. What parameters in the control process and how to regulate them are the key to improving the flotation yield and efficiency.
  • the prior art uses the above-described high efficiency cyclone flotation machine without a breakthrough in the high efficiency, high yield and high grade concentrate of the slurry.
  • a beneficiation agent also referred to as an admixture
  • concentration of the slurry is different from the sewage treatment, it varies greatly and needs to be adjusted at any time. Therefore, manual control of process parameters such as the prior art often results in a decline in product quality or scrappage due to loss of control, and the economic loss is enormous. It is also very difficult to find reasons and investigate responsibility afterwards.
  • the transformation investment is too high to be accepted by many mineral processing manufacturers. How to make the monitoring control effect is good, and the investment amount is small, which is acceptable for the mineral processing enterprises. It is also a technical problem that has not been solved in the prior art.
  • the object of the present invention is to improve the deficiencies of the prior art, and to provide a slurry cyclone flotation method which can make the flotation efficiency and the collection by adjusting the process parameters in the cyclone flotation process carried out in the cyclone flotation device.
  • the rate has increased significantly.
  • Another object of the present invention is to provide a swirling jet that can be easily adjusted to meet the above process conditions. Select the column.
  • Still another object of the present invention is to provide a cyclone flotation apparatus which can effectively monitor the above-mentioned special walking parameters in the process, thereby providing a guarantee condition for timely regulation.
  • the present invention provides a slurry cyclone flotation method, wherein a mineral processing agent is sent from a mineral processing agent mixing tank to a slurry mixing drum, and the slurry is conveyed by a slurry pump through a swirling jet suction blower with a spiral flow.
  • the narrowed nozzle is swirled into the lower slurry inlet of the flotation cell in the flotation column, while a certain amount of air is drawn into the bubble through the air tube on the foamer to produce bubbles, and the slurry is passed through.
  • the bubble layer is formed above and flows into the bubble tank, and then discharged from the concentrate slurry outlet, and then filtered through a filter to obtain a concentrate, and the tailings slurry is discharged from the discharge port at the lower part of the flotation tank;
  • the average diameter of the controlled pulp is 0. 10 cm - 3. 00 cm, and the thickness of the pulp foam layer is 3 cm - 50 cm.
  • the average diameter of the pulp foam is preferably 0.30 cm to 0. 50 cm, and the thickness of the pulp foam layer is 10 cm to 30 cm;
  • a method of controlling the size of the slurry foam diameter and the thickness of the slurry foam layer includes: adjusting a distance between the baffle and the slurry inlet in the flotation cell, and/or adjusting the valve provided on the air tube on the foamer The swirling jet injects a flow area of the intake port on the suction foamer to thereby adjust the amount of intake air.
  • the adjustable distance range of the baffle is: the ratio of the distance between the slurry inlet and the baffle in the flotation tank is the same as the distance between the mineralization inlet and the tailings slurry discharge port is 20%-90%. The best value for the above ratio is 40% - 70%.
  • the pump is a variable frequency pump having a feed pressure of 2.51 kg / cm 2 - 8. 00 kg / cm 2 .
  • the best slurry feed pressure is 3 kg / cm 2 - 4 kg / cm 2 , and the variable frequency pump is connected with the slurry mixing tank.
  • Tailings flow, grade, concentration
  • a flow rate monitoring in the pipeline between the outlet of the slurry mixing tank and the inlet of the pump;
  • the concentrate discharge pipe in the bubble tank is in the pipeline between the concentrate tank connected to the rear and/or in the concentrate tank and/or on the filter machine;
  • Pump head at the pump outlet and / or on the pump circuit.
  • the following process parameters are monitored in real time - the concentration and flow rate of the agent in the mixing tank of the mineral processing agent;
  • Tailings ore grade Tailings ore grade.
  • Another preferred solution for monitoring process parameters in real time is: Real-time monitoring - concentration and flow of the agent in the mixing tank of the mineral processing agent;
  • the present invention provides a cyclone jet flotation column for use in the above flotation method, comprising a flotation cell and a bubble trough connected to each other, and a slurry inlet and a tailings outlet are provided at the bottom of the flotation cell.
  • a swirl jet suction blower is mounted on the mine inlet, the swirl jet suction blower comprising a narrowing passage from the inlet end to the outlet end, and an air inlet on the side wall of the thicker passage a port connecting the intake pipe, wherein the intake pipe is provided with an adjustment valve; a conical hollow nozzle is arranged in the passage, and 0 or a plurality of spiral baffles are arranged on the inner wall of the conical nozzle, and the outlet end of the nozzle is located The front end of the narrowing channel, the inlet end of the nozzle is isolated from the air inlet; the inlet end of the swirling jet suction foamer is connected to the outlet of the mine pump through a pipeline; a concentrate outlet is arranged on the flotation tank, The bubble groove is connected, and a baffle is arranged in the flotation tank opposite to the nozzle of the swirl jet suction blower, so that the slurry inlet is separated from the tailings outlet, and the feature is: the baffle passes a linear motion mechanism is
  • the baffle adjusts the distance from the slurry inlet by the linear motion mechanism: the ratio of the distance between the slurry inlet and the baffle in the flotation tank and the distance between the ore inlet and the tailings slurry discharge port It is 20% - 90%.
  • the ratio of the distances is preferably from 40% to 70%.
  • the present invention also provides a flotation device comprising the above-described cyclone flotation flotation column, wherein the swirling jet flotation column is included, and a tailings bin is connected to the tailings ore outlet thereon,
  • the concentrate outlet in the foam tank is connected to the concentrate tank, the outlet of the concentrate tank is connected to the pipeline, and the concentrate is connected to the concentrate filter, and further includes one or several ore dressing mixing tanks, and a slurry mixing tank.
  • the mineral ore mixing drum is connected to the slurry mixing drum through a pipeline, the slurry mixing tank is connected to the inlet of the pump connected to the flotation tank, and the outlet of the pump is connected to the inlet end of the swirling jet suction foamer.
  • the utility model also includes a production system monitor, which comprises a computer host and a sensor cable connected to the motherboard of the computer host, that is, a host line;
  • a corresponding sensor is disposed at one or more of the following positions, and the signal output end of the sensor is connected to the computer main board through the sensor connection line after AD conversion, so as to collect:
  • the concentrate discharge pipe into the pipeline between the concentrate tanks connected behind and / or in the concentrate tank and / or on the filter;
  • the difference between the present invention and the prior art is that it is found that in the flotation of the tailings slurry, especially in the application of the cyclone flotation column flotation, the foam in the flotation tank is controlled on the basis of using a suitable beneficiation agent.
  • the size of the average diameter and the thickness of the foam layer play a key role in increasing the recovery of various mineral particle sizes. Controlling the diameter of the bubble and the thickness of the foam layer within a set range can effectively improve the recovery of the beneficiation.
  • An effective and quick way to adjust the diameter of the foam is to adjust the distance between the baffle in the flotation cell and the slurry inlet and the amount of inhalation of the swirl jet suction blower. Further, matching the slurry delivery pressure is also an important factor.
  • the delivery pressure of the slurry is 2 kg/cm 2 , which is relatively small.
  • the invention has been tested and found that the ore pressure is increased, and the ore recovery rate can be significantly improved. And different mineral ore pressures should be different.
  • the recovery rate can be improved by simply increasing the amount of the agent and mixing the different agents, but in practice, it is often because of the agent. Adding too much makes the pulp composition more complicated, so that the separation effect is not significantly improved.
  • the slurry flotation flotation process Analyze the slurry flotation flotation process.
  • the slurry is mixed into the flotation tank through the swirling jet nozzle and rushed to the baffle disposed directly opposite the feeding nozzle to generate friction, collision, decompression, further breaking the foam, and generating microbubbles.
  • the size of the bubble diameter and the thickness of the foam layer are the key factors for improving the recovery rate of the ore and achieving energy saving.
  • By adjusting the distance of the baffle it is possible to increase or decrease the impact and friction on the slurry entering the flotation cell, which has an obvious effect on adjusting the foam size.
  • the flotation has not been expected to increase the recovery rate by controlling the foam size at any time through the baffle. Therefore, although the existing swirling spray flotation tanks are provided with baffles, their main function is to separate the slurry inlet from the tailings slurry outlet. Therefore, the baffles are fixed and unadjustable in the flotation tank.
  • the benefits of cyclonic flotation for flotation have long been known in the prior art, but the estimation of the effect of the amount of air inhaled by the cyclone flotation on the flotation process is insufficient, and the inspiratory amount is only passed through the slurry according to the ore pressure.
  • the negative pressure generated by the change in the flow velocity in the swirl jet suction blower is naturally formed, and a valve for controlling the intake air amount or the like is never provided on the intake pipe of the swirl jet suction blower.
  • the invention shows through experiments that the amount of inhalation can directly affect the size of the foam diameter and the thickness of the foam layer, and the size of the bubble diameter affects the recovery rate.
  • the present invention proposes to control the suction of the cyclonic flotation. Gas volume. The numerical range of the amount of intake air during the cyclone flotation process is given.
  • the swirl flotation column provided by the present invention is correspondingly modified to change the fixed baffle into a movable structure to accommodate the adjustment.
  • an adjustment air valve is provided on the intake pipe thereon.
  • the invention is also important for improving the height of the baffle in the flotation tank.
  • the baffle is mainly disposed, considering that the inlet and the outlet of the pulp slurry are separated, and the height of the baffle is relatively low, so that With large pressure, the slurry that is sprayed into the flotation cell by swirling is easily turned over the baffle and quickly discharged from the tailings outlet. This is also the reason that affects the recovery rate.
  • the invention increases the baffle and effectively prevents the slurry from leaving the flotation tank too early.
  • the height of the baffle is also Can not be too high, if it is higher than the height of the foam layer during flotation in the flotation cell, it will affect the flotation. Therefore, the upper limit of the height of the defined baffle should be lower than the thickness of the froth layer. For example, if the thickness of the bubble layer is specified to be 3 to 50 cm, the height of the baffle should be at most 3 to 60 cm below the concentrate outlet. Always lower than the foam layer. Further, in order to conveniently change the slag pump matched with the flotation tank according to the change of the pulp to be treated, the variable frequency pump is used.
  • cyclone flotation to treat slurry extraction concentrate is a process in which the parameters of each link in the flotation process may change at any time. Unlike the wastewater treatment situation, minor changes in one of the parameters are not discovered in time, which leads to recycling. The rate is greatly reduced.
  • the flotation process there are many parameters in each link. It is a problem to monitor the parameters and monitor the whole process effectively. This is a problem. If the monitored parameters are too small, or some key parameters are not monitored, the monitoring will not be effective. If too many parameters are monitored, the cost of monitoring will increase, and the operation of the process will become complicated. Excessive complexity, and no monitoring often has the same effect in actual operation. Monitoring too many parameters, in the face of monitoring too much data changes, may make the operator feel overwhelmed, and sometimes do not take any measures, so there is no difference between no monitoring and no monitoring.
  • the invention scientifically analyzes the cyclone flotation process, grasps the key links, and proposes several parameters of several parts that are monitored in real time but are very critical. By monitoring these parameters and adjusting them at any time without deviating from the set value, the swirl flotation process can be well controlled to ensure a stable recovery rate.
  • the cyclonic flotation method provided by the invention solves the problem in the existing beneficiation technology, by matching the slurry pressure and the inspiratory volume, the ore dressing agent, the size of the foam diameter and the thickness of the foam layer, and the dressing agent regulating potential, thereby making the Various mineral particles are combined by various forces such as fluid dynamics, surface chemical force, and interaction between mineral particles, and strengthen the separation process of minerals.
  • the ore pressure in this method is significantly greater than that of conventional flotation machines, so in the ore supply During the process, mineral friction is generated, the surface of the mineral surface is scrubbed, and the surface area of the mineral collision with the agent is increased, the selectivity is increased, and the collision and adhesion between the fine-grained mineral and the bubble can be enhanced; Non-selective agglomeration between grain-level ore particles and inclusions of fine-grained gangue in bubble clusters; increasing enrichment ratio, ensuring high recovery and concentrate grade for one-stage flotation; effective recovery of fine particles Grade to less than 0.005 mm metal minerals, which is the result of recycling that other flotation processes cannot achieve. Can improve the beneficiation efficiency, fast, cheap.
  • the swirl flotation column and the corresponding swirl flotation device provided by the invention can be well matched with the process, and the operator It is easy and easy to implement, ensuring that the flotation method is well implemented.
  • the present invention can reduce the cost of various mineral separation operations, the production cost of the flotation machine is low, and the production operation cost is also greatly reduced.
  • the flotation machine is more energy-efficient, 65% energy-saving than ordinary flotation machines, more than 45% energy-saving than traditional flotation columns, and suitable for various mineral separation fields.
  • Figure 4 is a left side view of Figure 3;
  • Figure 5 is a cross-sectional view of the swirl jet aerator
  • Fig. 8 is a schematic diagram showing the structure and flow of a controlled potential cyclone jet flotation column.
  • the swirl jet suction foamer 3 is mainly composed of a three-way pipe housing 5, a conical nozzle 4, an intake pipe 2, and a slurry air mixing injection pipe 7; 5 is composed of a cylindrical cavity 5a and a tapered cavity 5b.
  • the three-way pipe housing 5 is provided with a conical nozzle 4, see FIG. 3 and FIG.
  • the swirling jet suction foamer 3 is located at a position substantially coincident with the bottom of the flotation tank 11; the swirl jet suction foamer 3 may also be located at the upper portion (below the flotation tank concentrate outlet), the middle portion, and the flotation
  • the spiral baffles 12 are evenly distributed on the inner wall of the conical nozzle 4 at any of the ore feeding portions of the trough.
  • the number of the spiral baffles 12 is 0-8 pieces, and the optimal number of the spiral baffles 12 is 3-6 pieces; when the number of the spiral baffles 12 is 0 pieces, the jet slurry does not generate a swirling flow, as the floating
  • the special case of the machine can also perform flotation operations.
  • the slurry air mixing injection pipe 7 is connected to the flotation tank 11.
  • the slurry air mixing injection pipe 7 is connected to the flotation tank 11; the foaming tank 1 is disposed at the side of the upper end of the flotation tank 11; the bottom of the flotation tank 11 is provided with the tailings discharge port 13; the bottom of the flotation tank 11 is located at the tail A baffle 8 is provided between the mine discharge port 13 and the slurry air mixing injection pipe 7 for spirally adjusting the front and rear distances, and the parallel baffle 8 is parallel to the outlet end surface of the slurry air mixing injection pipe 7, and the baffle fixing block 14 fixes the baffle 8;
  • the flotation tank 11 is supported by the support 15; the tailings discharge port 13 is connected to the tailings row
  • the baffle 8 and the flotation tank are fixedly connected by an adjustable device A that can move the baffle back and forth, and the adjustable device A can adjust the distance between the baffle and the slurry inlet.
  • the adjustable device A includes two guide rails 01 disposed on the bottom plate of the flotation slot, and the baffle 8 is slidably fixed to the guide rail 01:
  • a screw hole is arranged on the baffle plate, and a threaded shaft 02 is screwed thereon, which is fixed in the flotation groove.
  • a bevel gear 03 is also fixed on the threaded shaft.
  • a vertical shaft 04 is fixedly fixed in the flotation groove, and a bevel gear 05 is fixedly engaged with the bevel gear 03, and the vertical shaft 04 is extended upward.
  • the hand wheel can be fixed at the upper end of the vertical shaft 04, and the hand wheel can be rotated to move the baffle 8 on the rail 01, thereby adjusting the distance between the baffle and the slurry inlet.
  • the adjustable movement of the baffle can be achieved by a variety of linear motion mechanisms in the prior art.
  • the device exemplified in this embodiment is only one of the solutions and is not intended to be a unique limitation of the adjustable device.
  • a tee 10 is connected to the end of the tailings discharge pipe 9.
  • the tail end of the tailings discharge hose 9 can also be connected to the tailings gate box commonly used in flotation machines.
  • the pressurized slurry is sprayed from the cone nozzle 4 with the spiral baffle 12 at a high speed, so that the air suction chamber 6 generates a negative pressure, and the outside air is sucked in by the intake pipe 2 and has a valve.
  • the regulation due to the winding action of the jet stream, produces fine bubbles, and is sprayed into the flotation tank 11 through the slurry air mixing injection pipe 7 along with the paddle flow. At this time, the air dissolved in the slurry is also present due to a sudden drop in pressure. A large amount of microbubble forms are precipitated.
  • the rotating slurry stream is directed toward the spirally regulated baffle in the groove.
  • the distance between the baffle 8 and the slurry inlet by the linear motion mechanism A may be: the distance between the slurry inlet and the baffle in the flotation tank is 20% of the distance between the slurry inlet and the tailings slurry discharge port— 90%.
  • a preferred value of the ratio of the adjustment distances is 40% - 70%.
  • the height of the baffle is such that the lower limit is 1/3 of the height of the flotation cell; the upper limit is 3 - 60 cm below the concentrate outlet to ensure that it is below the bubble layer.
  • the flotation device 100 includes the cyclone jet flotation column 101, and a tailings tank is connected to the tailings slurry outlet, and a foam is connected to the concentrate outlet of the flotation tank. Slot, the concentrate outlet of the bubble trough is connected to the pipeline, behind
  • the concentrate filter 102 is further included, and further includes one or several ore dressing agitating drums 103, and further includes a ore mixing drum 104, and the ore mixing tank 103 is connected with the slurry mixing drum 104 through a pipeline 105, and the slurry mixing tank is connected.
  • variable frequency pump 106 connected to the flotation tank
  • the outlet of the variable frequency pump 106 is connected to the inlet end of the cyclone jet aspirating foamer 3, and the concentrate outlet of the flotation column is connected to the concentrate filter 102 through the pipeline 105.
  • a production system monitor which includes a computer host 107, a sensor connection line connected to the main board of the computer host, that is, a plurality of host lines 108;
  • a slurry concentration sensor C1 is disposed at a lower portion of the flotation tank, a potential sensor C2 is disposed, and a concentration sensor C3 and a drug flow sensor C9 are disposed in the ore dressing mixing tank 103, and are disposed on the concentrate pipe outlet connecting pipe or behind the filter.
  • the sensor C4 is used to measure the concentrate flow
  • the sensor C5 is set in the bubble tank to collect the concentrate grade data
  • the sensor C6 is set in the ore mixing drum 104 to collect the slurry flow data
  • the sensor C7 is arranged at the outlet of the variable frequency pump 106. , collect the pump's head data.
  • Sensor C8 is set at the tailings slurry outlet to collect tailings grade.
  • Each of the above sensors is connected to the computer main board 107 through the sensor connection line 108 through the AD output of the signal output end of the sensor.
  • the mineral flotation process provided by the invention is: the ore dressing agent is sent from the various ore dressing agent mixing barrels into the slurry mixing barrel, and the slurry is driven by the variable frequency pump of the slurry through the swirling jet suction blowing machine with the spiral deflector narrowing
  • the nozzle is swirled into the lower slurry inlet of the flotation cell in the flotation column; the flotation cell controls the spacing between the baffle and the inlet of the ore paddle, and the baffle breaks the bubble to make a suitable diameter of the foam and During the ascending process, secondary enrichment concentrate is produced.
  • the height of the baffle is set at more than 1/3 of the height of the flotation tank to below the height of the flotation tank, which solves the problem of direct bubble tailing of the mineral oil.
  • the addition is controlled in a mixing tank; the concentrate ore is discharged from the foam tank above the flotation tank through the concentrate outlet and filtered through a filter; during the entire flotation process, the following process parameters are monitored and monitored:
  • the concentrate flow in the concentrate discharge pipe in the bubble tank and the concentrate grade obtained on the filter and the concentrate flow rate of the filter; and the lift of the variable frequency pump is also collected.
  • test results show that when the grade of the concentrate is found to be reduced, the parameters of the foam in the foam tank can be observed. Generally, the parameters have deviated from the set value by more than 10%, and the diameter of the concentrate foam is greater than 0.80 cm.
  • a simple adjustment method is to reduce the distance between the baffle and the slurry inlet by turning the handwheel. This effectively and quickly reduces the diameter of the foam, and the concentrate grade is quickly improved.
  • the flotation device comprises the above-mentioned flotation column, a tailings discharge trough is connected to the tailings outlet, a concentrate tank is connected to the concentrate outlet, and one or several ore dressing agent stirring crucibles are passed through the tube.
  • Road and the upper section of the flotation column Connected; also includes a production monitoring system, which includes a computer host, a sensor cable connected to the motherboard of the computer host, that is, a host line;
  • a sensor is disposed in the concentrate tank connected to the concentrate outlet on the flotation column of the flotation device, and the sensor also connects the signal to the computer motherboard through the sensor connection line, so as to collect the grade of the concentrate, and also collect Flow data of the concentrate;
  • a sensor is disposed on the variable frequency pump circuit, and the sensor also connects the signal to the computer motherboard through the sensor connection line to collect the head data of the pump.
  • the size of the flotation cell is monitored by computer video, and the thickness of the foam layer is monitored by computer video or by sensors placed on the window on the flotation cell.
  • sensors can be set in the concentrate tank or on the filter to monitor the grade of the concentrate, and the flotation process can be adjusted in time according to the change. Some conditions, such as the concentration of the agent, the flow rate, or by adjusting the distance of the baffle or the amount of inhalation, thereby adjusting the average diameter of the foam or the thickness of the foam layer to ensure the grade of the concentrate.
  • the concentrate discharge pipe into the pipeline between the concentrate tanks connected behind and / or in the concentrate tank and / or on the filter;
  • Pump head at the pump outlet and / or on the pump circuit.
  • a sensor is arranged in the beneficiation mixing tank, and a sensor is arranged in the flotation tank, and the concentrate outlet of the foam tank is arranged in a place in the concentrate tank and in the tailing box.
  • a sensor the signal output end of the sensor is connected to the computer main board through the sensor connection line after AD conversion, so as to collect the concentration and flow rate of the medicament in the mixing potion of the ore dressing agent; the concentration of the slurry; the grade and flow of the concentrate; the grade of the tailings pulp; ,
  • a sensor is arranged in the beneficiation mixing tank, and a sensor is arranged in the flotation tank, and the concentrate outlet of the bubble trough is in a place in the concentrate tank and in the tailing box.
  • a sensor is provided, and the signal output end of the sensor is connected to the computer main board through the sensor connection line after AD conversion, so as to collect the concentration and flow rate of the medicament in the mixing potion of the ore dressing; pulp concentration, grade, slurry potential mV or pH value; tailings Grade of pulp; concentrate grade.
  • the above apparatus is used for the flotation operation.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the optimal conditions for the regulation of the potential of the flotation separation are: the pressure of the ore slurry is: 3. 00 kg / cm 2 ; the swirling jet suction foamer (negative pressure) intake air is 0. 35 ⁇ 3/ ⁇ ; The flotation tank (directly opposite the nozzle of the ore) is adjusted to 60% of the front and rear distance to regulate the microbubble of the slurry; the average diameter of the slurry is 0.60 cm; 30 cm; pulp pH12.
  • slurry potential 1 70mV slurry potential 1 70mV
  • ethyl sulphide nitrogen (DDTC) as the main collector for lead selection
  • lime as pH and slurry potential adjustment and stabilizer
  • monitoring slurry concentration, flow, grade, setting Concentration and flow rate of the admixture if the flow rate and the grade of the concentrate are monitored, if the respective parameters are within the set value range, the recovery rate of the single ore dressing reaches 80.5%; if other parameters are unchanged If the ore dressing pressure is less than 3 kg/cm2, the ore recovery rate will be lower than 73.5%, which directly affects the ore recovery rate.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the pressure of the ore slurry is: 3. 50 kg/cm2; the valve controls the swirl injector (negative pressure).
  • the temperature of the foam is 0.50 cm; the thickness of the foam layer is greater than 0.50 cm 3 / min; the flotation tank (directly opposite the nozzle of the ore) is adjusted to 50% of the front and rear distance to regulate the microbubble of the slurry; At 35 cm; the pH of the slurry varies between 12. 3-12. 6 and the potential of the ore is also stable at 1 55 mV. At this point, the recovery rate of lead flotation reaches a maximum (9.15%), while lead concentrate The zinc and iron content in the mine is reduced to a minimum. If the other parameters are the same, the valve control air intake is less than 0. 30 m 3 / min, the ore recovery rate is lower than 72.5%, directly affecting the beneficiation recovery rate.
  • the experimental results show that the optimum foam average diameter of the lead/zinc-sulfur control flotation separation and the thickness of the flotation layer are: 30. 30 cm; the thickness of the foam layer is greater than 40 cm.
  • the pressure of the ore slurry is: 3. 00 kg / cm 2 ; the swirling ejector (negative pressure) intake air volume is 0. 45 m 3 / min; flotation tank (directly opposite the feed nozzle) baffle adjustment
  • the pulverized microbubble is regulated by 50% to the front and rear distance; the pulp pH is 12.4, the pulp potential is 1 5 5raV, and the ethyl sulphide nitrogen (DDTC) is used as the main collector for lead selection.
  • DDTC ethyl sulphide nitrogen
  • the size of the bubble diameter and the thickness of the flotation cell foam layer will change, directly affecting the ore recovery rate.
  • pressure to the ore paddle is: 2. 50 kg / cm 2; valve control
  • the swirling ejector (negative pressure) inhaled air volume is 0. 20 m 3 / min; the flotation tank (directly opposite the feeding nozzle) baffle is adjusted to 70% of the front and rear distance to regulate the slurry microbubble; pulp foam average
  • the dressing recovery rate is lower than 62.5.
  • the diameter of the mineral layer is less than 15 cm; the pH of the ore is between 12. 3-12. 6 and the slurry potential is also stable at 1 55 mV. % directly affects the recovery rate of ore dressing.
  • the recovery rate at this time is still high compared to the value of about 30% which is usually in the prior art. Even if the average diameter of the control foam is between 0.1 and 0.5 cm, the thickness of the foam layer is 3-5 cm, and the recovery rate is also higher than that in the prior art.
  • the industrial production practice of the potential control cyclone flotation flotation technology proves: the pressure of the slurry feed, the amount of suction, the adjustment of the flotation baffle, the average diameter of the foam and the thickness of the foam layer are the parameters of the flotation core matching adjustment. .
  • the height of the flotation tank is 1 m to 3 m to 15 m, and the optimum height is 2 m to 5 m; the length, width and diameter of the flotation machine are not limited, and any shape may be adopted depending on the flotation mineral. .
  • the process of flotation can be one or more times.
  • the jet suction foamer has three functions. First, the swirling jet suction foamer causes the slurry to rotate, which is beneficial to the full contact of the slurry and the bubble, so that the bubble has more chance of crushing;
  • the flow jet suction foamer works with the jet pump and is powered by pressurized slurry. The source generates a rotating slurry jet, and the slurry air medium is sucked into the flotation tank.
  • the novel regulated potential swirl jet flotation column removes the air intrusion device, and the air is automatically inhaled and
  • the valve can control the amount of inhalation;
  • the swirling jet suction foaming device is a jet type emulsifier device, which has an emulsification effect on the medicament, and can disperse the liquid and the flow into a very fine state, so that the bubble and The agent is emulsified, strengthens the mineralization process of the bubble, and reduces the dosage of the agent: making the liquid, solid, gas, and pharmaceutical agents more fully, quickly, and reasonably, realizing the collision contact surface area of minerals and foams and expanding the selection of minerals for the agent.
  • Sex which expands the selectivity of beneficiation, and achieves a cyclonic spray flotation column with good separation effect, high speed, large processing capacity and high flotation efficiency.
  • the air Due to the pressure of the slurry, the air is automatically inhaled and can be controlled by the valve.
  • the spiral track can be adjusted by the bottom of the flotation tank to increase the collision and friction.
  • the adsorption reaches the effect of breaking the foam, which increases the solubility of the air in the slurry.
  • variable frequency pump According to the mineral change of mine resources, the pulp supply pressure and the adjustable suction capacity of the foaming machine and the diameter of the bubble diameter and the foam layer can be adjusted at any time. Good match relationship.
  • the slurry cyclone flotation method provided by the invention can adjust the process parameters of the cyclone flotation process in the cyclone flotation device, so that the flotation efficiency is greatly improved, and the flotation quality in the flotation process is ensured.
  • the provided flotation column and flotation unit provide the necessary protection for the implementation of the flotation process.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé de flottation de type cyclone pour une suspension, qui consiste à limiter le diamètre moyen de la mousse de la suspension entre 0,10 et 3,00 cm et à limiter l'épaisseur de la couche de la mousse de la suspension entre 3 et 50 cm durant l'enrichissement de minerais. Le procédé pour le contrôle du diamètre moyen de la suspension et de l'épaisseur de la couche de la mousse de la suspension comprend les étapes qui consistent à : régler la distance entre un déflecteur (8) et une entrée de suspension (7) dans le réservoir de flottation (11) ; régler l'entrée d'air à l'aide d'une vanne (201) montée sur un tuyau à air(2) d'un générateur de mousse (3) et à contrôler des paramètres en temps réel pendant l'enrichissement de minerais. L'invention présente également une colonne de flottation de type cyclone et un dispositif utilisé dans le procédé. L'invention présente bien des avantages, par exemple elle permet de diminuer le coût d'enrichissement de minerais, de diminuer le coût de fabrication du dispositif de flottation de type cyclone, de faire des économies d'énergie et de convenir pour bien des types de séparation de minerais.
PCT/CN2007/003493 2006-12-08 2007-12-07 Procédé de flottation de type cyclone pour suspension et colonne de flottation de type cyclone et dispositif correspondant WO2008067733A1 (fr)

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PCT/CN2007/001480 WO2008067702A1 (fr) 2006-12-08 2007-04-30 Procédé de flottation cyclonique pour minerai sous forme liquide, colonne de flottation de cyclone et appareil de flottation associé
PCT/CN2007/003493 WO2008067733A1 (fr) 2006-12-08 2007-12-07 Procédé de flottation de type cyclone pour suspension et colonne de flottation de type cyclone et dispositif correspondant

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CN109759241A (zh) * 2019-01-31 2019-05-17 中国矿业大学 一种宽粒度级煤泥浮选的装置及方法
CN110404691A (zh) * 2019-07-29 2019-11-05 北京拓金科技有限公司 一种药剂快速分散装置及方法
CN113333179A (zh) * 2021-05-13 2021-09-03 西北矿冶研究院 一种兼顾原料品位大幅波动的混合精选方法
CN113628270A (zh) * 2021-10-09 2021-11-09 北矿机电科技有限责任公司 摇床接矿位置的调整方法、装置、电子设备及存储介质
CN115025665A (zh) * 2022-05-09 2022-09-09 昆明理工大学 一种实验室矿粉自动混匀取样机
CN115069425A (zh) * 2022-07-20 2022-09-20 江苏仕晟工业技术研究院有限公司 一种浮选机入料矿浆检测调节装置

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CN112619910A (zh) * 2020-11-27 2021-04-09 太原钢铁(集团)有限公司 一种提高旋流器铁矿浆分级效率的方法
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CN116899279B (zh) * 2023-09-13 2023-12-01 江西亚非国际矿冶研究有限公司 一种智能选矿浓密机

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109759241A (zh) * 2019-01-31 2019-05-17 中国矿业大学 一种宽粒度级煤泥浮选的装置及方法
CN109759241B (zh) * 2019-01-31 2019-11-29 中国矿业大学 一种宽粒度级煤泥浮选的装置及方法
CN110404691A (zh) * 2019-07-29 2019-11-05 北京拓金科技有限公司 一种药剂快速分散装置及方法
CN113333179A (zh) * 2021-05-13 2021-09-03 西北矿冶研究院 一种兼顾原料品位大幅波动的混合精选方法
CN113628270A (zh) * 2021-10-09 2021-11-09 北矿机电科技有限责任公司 摇床接矿位置的调整方法、装置、电子设备及存储介质
CN113628270B (zh) * 2021-10-09 2022-03-29 北矿机电科技有限责任公司 摇床接矿位置的调整方法、装置、电子设备及存储介质
CN115025665A (zh) * 2022-05-09 2022-09-09 昆明理工大学 一种实验室矿粉自动混匀取样机
CN115069425A (zh) * 2022-07-20 2022-09-20 江苏仕晟工业技术研究院有限公司 一种浮选机入料矿浆检测调节装置

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