WO2008067702A1 - Procédé de flottation cyclonique pour minerai sous forme liquide, colonne de flottation de cyclone et appareil de flottation associé - Google Patents

Procédé de flottation cyclonique pour minerai sous forme liquide, colonne de flottation de cyclone et appareil de flottation associé Download PDF

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Publication number
WO2008067702A1
WO2008067702A1 PCT/CN2007/001480 CN2007001480W WO2008067702A1 WO 2008067702 A1 WO2008067702 A1 WO 2008067702A1 CN 2007001480 W CN2007001480 W CN 2007001480W WO 2008067702 A1 WO2008067702 A1 WO 2008067702A1
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WIPO (PCT)
Prior art keywords
flotation
slurry
tank
concentrate
inlet
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PCT/CN2007/001480
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English (en)
Chinese (zh)
Inventor
Bin Li
Jiang Wang
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Bin Li
Jiang Wang
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Publication date
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Publication of WO2008067702A1 publication Critical patent/WO2008067702A1/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.
  • Cyclonic flotation technology is a newly developed flotation technology. With the birth of the cyclone flotation machine (Patent No. 02252728. 1), the cyclonic flotation technology is widely used in actual flotation applications.
  • the cyclone jet flotation machine has a swirling jet suction foamer with a spiral baffle and a tapered nozzle. Compared with other flotation machines, the advantages are as follows: (1) a large amount of gas, small bubbles, gas High 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%; (2) low energy consumption is 50 to 60% of the energy consumption of the 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 mineral flotation separation process.
  • the swirling jet 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, and the recovery rate of concentrate is far from reaching. 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 are the key to improving the efficiency and efficiency of flotation, and how to regulate it.
  • 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 pollution, it varies greatly and needs to be adjusted at any time. Therefore, manual control of process parameters like the prior art often leads to product quality degradation or scrappage due to loss of control and the like, and economic losses are enormous. It is quite difficult to find reasons and check responsibility afterwards.
  • the automatic control system in the prior art has a high investment and cannot be accepted by many mineral processing manufacturers. How to make the monitoring and control effect good, and make its investment amount smaller, is acceptable for the mineral processing enterprises, and 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.
  • Still another object of the present invention is to provide a cyclonic flotation apparatus which can effectively monitor the above-mentioned specific parameters in the process to provide a guarantee 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.
  • a foam layer is formed above and flows into the foam 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 portion of the flotation tank;
  • the average diameter of the control pulp foam is from 0.1 cm to 3.00 cm, and the thickness of the pulp foam layer is from 5 cm to 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 25 cm;
  • a method of controlling the size of the ore foam diameter and the thickness of the slurry foam layer includes: adjusting a distance between the baffle and a slurry inlet in the flotation cell, and/or by adjusting a valve disposed on the air tube on the foamer The flow area of the intake port on the swirl jet suction blower is adjusted to adjust the intake air amount.
  • 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 mine entrance and the tailings slurry discharge port is 20% ⁇ 90%.
  • the best value for the above ratio is 40% to 70%.
  • the V-injection amount of the negative-pressure suction air is 0. 20 meters V minutes - 0. 80 meters V minutes.
  • the best inspiratory volume is 0. 35 meters 7 points a 0. 55 meters 7 points.
  • the pump is a variable frequency pump, and the feed pressure of the variable frequency pump is in the range 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.
  • Slurry flow, concentration, grade, potential and pH
  • 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;
  • b concentration under the flotation cell foam;
  • 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;
  • Pump head at the pump outlet and / or on the pump circuit. '
  • the invention provides a swirling jet flotation column, comprising a flotation trough and a foam trough connected to each other, a slurry inlet and a tailings outlet are arranged at the bottom of the flotation trough, and a swirling jet suction is installed on the slurry inlet.
  • a gas bubbler comprising: a narrowing passage from the inlet end to the outlet end, and an air inlet on the side wall of the thicker passage, connecting the intake pipe, in the passage a conical hollow nozzle is provided, and one or several spiral baffles are arranged on the inner wall of the conical nozzle, the outlet end of the nozzle is located at the front end of the tapered passage, and the inlet end of the nozzle is isolated from the air inlet;
  • the inlet end of the device is connected to the outlet of the mine pump through a pipeline; between the slurry inlet and the tailings discharge outlet in the flotation tank, a concentrate outlet is arranged on the flotation tank, and is connected with the foam tank a baffle is directly opposite the nozzle of the flotation cell, and is characterized in that: the baffle is disposed in the flotation tank by a linear motion mechanism, so that the distance between the baffle and the slurry inlet is changed by the mechanism; On the intake pipe An adjustment valve.
  • 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 is the same as the distance between the slurry inlet and the tailings slurry discharge port. 20% ⁇ 90%.
  • the ratio of the distances is preferably 401 - 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 10-6 cm below the concentrate outlet, To ensure that the upper edge of the baffle is below the foam layer during operation.
  • the present invention also provides a flotation device comprising the above-described swirling jet flotation column, wherein the swirling jet flotation column is included, and a tailings bin is connected to the tailings slurry 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 and the slurry mixing drum are connected through a pipeline, the ore mixing drum is connected to the inlet of the variable frequency pump connected by the flotation tank, and the outlet of the variable frequency pump is connected to the swirling jet suction foaming device.
  • the inlet end further includes a production system monitor, which includes 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 through AD conversion, so as to collect:
  • 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;
  • Pump head at the pump outlet and / or on the pump circuit.
  • 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 foam and the thickness of the foam layer within a set range can effectively improve the beneficiation recovery rate.
  • An effective and quick way to adjust the diameter of the foam is to adjust the distance between the baffle and the slurry inlet in the flotation cell and the inspiratory volume of the cyclone jet aspirator. Enter In one step, matching the slurry delivery pressure is also a major factor.
  • the delivery pressure of the slurry is 2 kg/cm 2 , which is relatively small.
  • the invention has been found through experiments to increase the ore pressure and significantly improve the recovery rate of the ore. 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 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 excessive foam means that the contact area between the slurry and the agent is not large enough. , the selection effect of the agent on the candidate mineral is not fully exerted. If the bubble is too small, it indicates that more minerals are not selected, so the recovery rate will not increase.
  • the size of the foam and the thickness of the foam layer are key factors in improving the recovery of the ore and achieving energy savings.
  • 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 a significant effect on adjusting the foam size.
  • the flotation did not expect that the foam size can be controlled at any time by the baffle to increase the recovery rate. Therefore, the existing swirl jet flotation tanks are provided with baffles, but their main function is to separate the slurry inlet from the tailings pulp 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 drawn 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 amount of inhalation can directly affect the size of the foam diameter and the thickness of the foam layer, and the size of the foam diameter affects the recovery rate.
  • the present invention proposes an inspiratory amount for controlling cyclonic flotation. .
  • 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 improved, and the fixed baffle is changed into a movable structure to meet the needs of adjustment.
  • an adjustment air vent is provided on the intake pipe.
  • the invention is also important for improving the height of the baffle in the flotation tank.
  • the baffle is arranged mainly because the inlet and 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.
  • the invention increases the baffle and effectively prevents the slurry from leaving the flotation tank too early.
  • the temperature of the baffle should not be too high. If it is higher than the height of the foam layer during flotation, the flotation will be affected. 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 foam groove thickness is specified to be 10-50 cm, the height of the baffle should be at most 10 - 60 cm below the concentrate outlet. Always lower than the foam layer.
  • the tank-matched slurry pump was changed to a variable frequency pump.
  • cyclone flotation to treat the ore 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, a small change in one of the parameters is not discovered in time, which leads to The recovery 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 few, or some key parameters are not monitored, the monitoring will not be effective. If there are too many parameters to be monitored, the cost of monitoring will be increased, and the operation of the process will be complicated and excessively complicated. Not 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 with 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 not 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.
  • the cyclonic flotation method provided by the invention solves the problem in the existing beneficiation technology, and by matching the slurry pressure and the inhalation amount, the ore dressing agent, the size of the foam diameter and the thickness of the foam layer, and the dressing agent regulating potential,
  • the mineral particles are subjected to a combination of fluid dynamics, surface chemical forces, interaction forces between mineral particles, etc., to strengthen the separation process of minerals.
  • the ore pressure in this method is significantly greater than that of conventional flotation machines in order to feed the ore.
  • Produces mineral friction has the effect of scrubbing the surface of the mineral, and increases the surface area of the collision of minerals with the agent, improves the selectivity, and can strengthen the collision and adhesion between the fine-grained minerals and the bubbles;
  • To a metal mineral of less than 0.005 mm which is a recycling effect that cannot be achieved by other flotation processes, and the process can be Improve beneficiation efficiency, fast and cheap.
  • the invention also provides an optimized process parameter monitoring system, which comprises a flotation device comprising the above-mentioned medicament mixing tank adding a vulcanizing agent to regulate the slurry potential, the variable frequency pump and the flotation column, and the sensor is arranged in the beneficiation mixing tank
  • a flotation device comprising the above-mentioned medicament mixing tank adding a vulcanizing agent to regulate the slurry potential, the variable frequency pump and the flotation column, and the sensor is arranged in the beneficiation mixing tank
  • Real-time monitoring of the concentration and flow rate of the drug can ensure the quality of the flotation.
  • the addition of the agent is critical for the flotation of the ore. If the amount and concentration of the agent change, the flotation efficiency will fluctuate greatly. Through the real-time monitoring of the present invention, adjustments are made in time to ensure the quality of the flotation.
  • the present invention also provides parameter monitoring for the slurry concentration and tailings grade in the flotation column of the cyclone flotation column, the concentrate flow rate on the filter conveyor belt in the concentrate outlet pipe, and several locations of the concentrate grade. , can more fully grasp the progress of the flotation process. There are many stations in the flotation process, and there are many parameters. It is a technical problem in this field to monitor which parameters can make the flotation efficient, sufficient and reasonable. The invention can make the process very good, efficient, fast, sufficient and reasonable by monitoring several parameters of the above several stations.
  • the cyclonic flotation column and the corresponding swirling flotation device provided by the invention can be well matched with the process, and the operation is convenient and easy, and the flotation method is ensured to be realized. Therefore, the 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% more energy efficient than ordinary flotation machines, and more than 45% energy efficient compared to conventional flotation columns, and is suitable for various mineral separation fields.
  • Figure 1 is a front elevational view of the controlled potential swirl jet flotation column of the present invention
  • Figure 2 is a left view of Figure 1:
  • Figure 3 is a front view of the cone nozzle
  • Figure 4 is a left side view of Figure 3;
  • Figure 5 is a cross-sectional view of the swirl jet aerator
  • Figure 6 is a front elevational view of a cyclone jet flotation machine provided with three swirling injection inflators;
  • Figure 7 is a left side view of the spiral regulating baffle at the bottom of the flotation cell
  • Fig. 8 is a schematic diagram showing the structure and flow of a controlled potential cyclone jet flotation column.
  • a swirling jet flotation column which comprises a flotation tank 11 and a foam tank 1 connected in series, and a slurry inlet is arranged on the bottom side wall and the bottom side of the flotation tank 11, respectively. 7 and the tailings outlet 13, the tailings outlet 13 is connected to the tailings discharge hose 9, and the end is connected to the tee 10 to discharge the tailings slurry.
  • a concentrate outlet is provided on the foam tank 1; a swirl jet suction blower 3 is arranged on the slurry inlet 7.
  • the cyclone jet aspirator 3 is mainly composed of a tee casing 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 cavity of the tee casing 5 is provided with a conical nozzle 4, see FIG. 3 and FIG.
  • the conical nozzle 4 is a hollow body, and the conical nozzle 4
  • the inner wall is provided with a spiral baffle 12; the outlet end of the conical nozzle 4 is located at the front end of the conical cavity 5b, and the inlet end of the conical nozzle 4 is isolated from the air suction chamber 6 and connected to the suction pump of the feed pump;
  • the side of the pipe casing 5 has an intake pipe 2, and the valve 201 provided in the intake pipe 2 controls the intake air amount;
  • the front end of the tapered cavity 5b is connected with a slurry air mixing injection pipe 7, the outlet end of the conical nozzle 4 and the slurry air.
  • the distance between the inlet end of the mixing spray tube 7 and the throat is controlled to be 5 mm to 100 mm; the optimum distance is controlled at .10 mm to 30 mm.
  • the swirling jet suction foamer 3 is located at a position substantially coincident with the bottom of the flotation tank 11; the swirling 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 hooked on the inner wall of the conical nozzle 4 at any feeding portion 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 with the flotation tank 11; the foam 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 tailings
  • a baffle 8 is provided between the discharge port 13 and the slurry air mixing injection pipe 7 for spirally adjusting the front-rear distance, 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 trough 11 is supported by the bracket 15; the tailings discharge port 13 is connected to the tailings discharge hose 9.
  • 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 arranged 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 regulating valve 201 is provided on the intake pipe of the swirl jet suction blower to adjust the flow area of the intake pipe.
  • the connected pump for conveying the slurry is a variable frequency pump whose pressure of the input slurry is adjustable.
  • the swirling jet aspirator 3 is located substantially in line with the bottom of the flotation cell 11, and the swirling jet aspirator 3 is located in the upper and middle portions and in any portion of the flotation cell 11.
  • 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 lock box commonly used in flotation machines.
  • the number of the swirling jet aspirator 3 can be set to one to a dozen depending on the number of flotation materials. See Figure 6: Flotation tank 11 Three swirl jet suction blowers 3 are installed in vitro.
  • the pressurized slurry is sprayed from the conical 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 wrapping action of the jetting flow, produces fine bubbles, and is sprayed into the flotation tank 11 via the slurry air mixing injection pipe 7 along with the slurry flow.
  • 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 controlled baffle in the groove.
  • the baffle 8 is at a suitable distance from the outlet of the slurry air mixing jet 7.
  • the two fluids injected into the tank, a slurry and air, are struck to adjust the front and rear distance of the baffle 8 and then consume the jet energy and rotate back around the injected fluid.
  • the air can be fully dispersed; on the other hand, the horizontal jet motion can be converted into a vertical motion to ensure that the mineralized bubbles in the slurry rise steadily, and the secondary enrichment forms a foam layer; the concentrate is taken out by the foam tank 1.
  • the tailings are discharged from the tailings discharge port 13 through the tailings discharge hose 9.
  • the tee 10 To raise or lower the slurry flotation level, simply raise or lower the position of the tee 10; if the slurry in the flotation tank 11 is to be emptied, the tee 10 is placed at the bottom of the flotation tank 11 It can be achieved below the height, and the tailings are easy to remove and clean.
  • the distance between the baffle 8 and the slurry inlet by the linear motion mechanism A may be:
  • the ratio of the distance between the slurry inlet and the baffle in the flotation tank is the same as the distance between the mineral inlet and the tailings slurry discharge port is 20%. ⁇ 90%.
  • the preferred ratio of the adjusted distance is 40% to 70%.
  • the flotation device 100 provided by the present invention comprises the swirling spray flotation column 101, and a tailings bin is connected to the tailings slurry outlet on the fine ore out of the flotation tank.
  • the tub 104 is connected through a pipeline 105 connected to the inlet of the variable frequency pump 106 connected to the flotation tank, and the outlet of the variable frequency pump 106 is connected to the inlet end of the cyclone jet aspirator 3, flotation
  • the concentrate outlet of the column is connected to the concentrate filter 102 through the pipeline 105; and further comprises a production system monitor, which comprises 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;
  • the slurry concentration sensor C1 is set in the lower part of the tank, and the potential sensor C2 is set.
  • the medicine concentration sensor C3 and the medicine flow sensor C9 are arranged on the concentrate pipe outlet connecting pipe or behind the filter.
  • the conveyor belt is provided with sensor C4 to measure the concentrate flow rate, and the sensor C5 is set in the foam tank to collect the concentrate grade data, and the sensor C6 is set in the slurry mixing tank 104 to collect the slurry flow data; the sensor C7 is arranged at the outlet of the variable frequency pump 106. Collect pump 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 signal output end of the sensor via AD conversion. '
  • the mineral flotation process provided by the invention is: the beneficiation agent is sent from a variety of ore dressing medicaments to the slurry mixing tank, and then the centrifugal propeller is passed through the swirling jet suction blower by the ore pump with the variable frequency pump.
  • the tapered 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 slurry inlet, and the baffle breaks the foam to a suitable diameter of the foam and
  • 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 bubbling of the ore paddle, and the potential of the slurry is controlled by the vulcanization agent.
  • the addition is controlled in a mixing tank; the concentrate slurry 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 collection process monitors the following process parameters - the concentration of the agent in the mineral processing tank and Traffic flow
  • the test shows that, when the grade of the concentrate is found to be reduced, the parameters of the bubble in the foam tank can be observed. Generally, the parameter has deviated from the set value by more than 10%, and the diameter of the concentrate is larger than 0. 80 cm.
  • the simple adjustment method is to reduce the distance between the baffle and the slurry inlet by turning the handwheel. This can effectively and quickly make the foam diameter smaller, and the concentrate grade is quickly improved.
  • the flotation device comprises a flotation column as described above, 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 agitating tanks are also passed through the tube.
  • the road is connected with the upper slurry mixing barrel of the flotation column; further comprising a production monitoring system, comprising a computer host, and a sensor connecting line connected to the main board of the computer main body;
  • 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 foam is monitored by computer video, and the thickness of the foam layer is monitored by computer vision or by sensors placed on the window on the flotation cell.
  • the valve on the regulating baffle and the air tube adjusts the amount of inhalation. As a result, the recovery rate can be guaranteed.
  • 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 the adjustment of the baffle distance or the amount of inhalation to adjust the average diameter of the foam or the thickness of the foam layer to ensure the grade of the concentrate.
  • the sensor acquisition monitors the following process parameters: the head of the variable frequency pump, the inspiratory volume of the suction tube of the foamer, and the potential and pH of the slurry in the flotation cell.
  • the foam diameter and foam layer thickness in the flotation cell are monitored in real time.
  • the above apparatus is used for the flotation operation.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the slurry potential is 1 70mV, and ethyl sulphide nitrogen (DDTC) is used as the main collector for lead selection.
  • Lime is used as the adjustment and stabilizer for pH and slurry potential. Monitor the concentration, flow rate and grade of the slurry, set the concentration of the admixture, Flow rate, at the same time, if the flow rate and grade of the concentrate are monitored, if the parameters are within the set value range, the recovery rate of the single ore dressing reaches 80.5%; if the other parameters are unchanged, the ore dressing pressure is less than At 3 kg/cm 2 , the ore recovery rate will be lower than 73.5%, which directly affects the ore recovery rate.
  • DDTC ethyl sulphide nitrogen
  • Example 2 Regulating valve control swirl injector (negative pressure) Intake air volume and flotation tank (directly opposite the feed nozzle) Adjust the slurry to the front and rear distance, adjust the slurry potential and pH value. As the amount of lime increases, the slurry p H increases, the ore potential decreases, and the recovery of the ore grade and lead in the lead concentrate is gradually increased.
  • the pressure is: 3. 50 kg / cm 2 ;
  • the valve control swirl injector (negative pressure) intake air volume is 0.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the test shows that the optimum diameter of the foam and the thickness of the flotation layer of the flotation separation are: 30. 30 cm; when the foam layer thickness is greater than 40 cm;
  • the pressure of the ore slurry is: 3. 00 kg / cm 2 ; the swirling ejector (negative pressure)
  • the amount of suction air is 0. 45 m 3 / min;
  • the flotation tank (directly opposite the feeding nozzle)
  • the front and rear distance is 50% to regulate the microbubble effect of the ore: the slurry pH12. 4, the pulp potential is 165 mV, and the sulphur nitrogen (DDTC) is the main collector for lead selection. If other parameters change, the size of the foam diameter and the thickness of the flotation cell foam layer will change, directly affecting the recovery rate.
  • DDTC sulphur nitrogen
  • the pressure of the ore slurry is: 2. 50 kg / cm 2 ; Injector (negative pressure)
  • the amount of inhaled air is 0. 20 mV; the flotation tank (directly opposite to the ore nozzle) is adjusted to 70% of the front and rear distance to regulate the microbubble of the slurry; the average diameter of the mineral foam 5%, the recovery of the ore is lower than 62. 5%, the thickness of the slurry is less than 15 cm; the pH of the slurry is between 12.3 and 12.6, and the slurry potential is also stable at 1 55 mV. Directly affect the recovery rate of mineral processing.
  • the industrial production practice of the potential control cyclone flotation flotation technology proves that: 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 core matching relationship of the flotation.
  • Example 4 In the industrial test, we found a new process of controlled potential cyclone flotation flotation. During the lead-zinc flotation process, the lead-zinc flotation rate is faster than the original process, and the medium-mineral quantity is significantly reduced. The industrial production results prove: The lead and zinc sweeping time can be satisfied in 5 minutes each, and the lead and zinc rough sweeping time in the original process design is more than 20 minutes. Thus, two flotation series can be replaced by one flotation series, which greatly saves flotation machines and spare parts and reduces energy consumption.
  • the corresponding data can be collected, processed by the software system, all recorded and randomly displayed, so that the quality in the production process is monitored.
  • 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 cyclone jet flotation machine of the present invention is a mechanically agitated flotation column, and the present invention has the following advantages as compared with the prior art -
  • the swirl jet suction foamer is located at substantially the same position as the bottom of the flotation tank. , mixed by slurry air jet u
  • the slurry gas mixture jetted at high speed has a strong stirring function on the bottom of the flotation tank, and the slurry does not precipitate ore through the bottom of the flotation tank.
  • the flotation tank has simple components, simple structure, convenient and reliable operation, and easy maintenance.
  • the flow jet suction foamer has three functions.
  • the swirl jet suction blower causes the slurry to rotate, which is beneficial to the full contact of the slurry and the bubble, so that the bubble has more chances of crushing;
  • the working principle of the cyclone jet aspirating foamer is the same as that of the jet pump, which uses a pressurized slurry as a power source to generate a rotating ore jet, and the slurry air medium is sucked into the flotation tank, compared with the Davkla flotation machine, the present invention
  • the new regulated potential cyclone jet flotation column removes the air intrusion device, the air is automatically inhaled and can be controlled by the valve;
  • the swirl jet suction foamer is a jet type emulsion device, The agent has an emulsification effect, which can disperse the liquid
  • the air Due to the pressure of the slurry, the air is automatically inhaled and can be controlled by the wide door.
  • the spiral path of the bottom of the flotation tank can be adjusted to increase the collision. Friction and adsorption reach the effect of breaking up the foam, which increases the solubility of the air in the slurry.
  • the pressure drops sharply, and the slurry in the air is supersaturated.
  • the air that is often present in the slurry preferentially precipitates on the surface of the hydrophobic mineral in the form of microbubbles, thereby strengthening the mineralization process of the bubbles, and depositing a large amount of active microbubbles, further matching the pressure of the slurry and the amount of inhalation and the diameter of the beneficiation foam.
  • variable frequency pump According to the mineral change of mine resources, the pulp supply pressure and the adjustable foaming capacity and the diameter of the foam and the best foam layer can be adjusted at any time. Matching 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, thereby greatly improving the flotation efficiency and ensuring the flotation quality in the flotation process.
  • the provided flotation column and flotation unit provide the necessary safeguards for the implementation of the flotation process.

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  • Life Sciences & Earth Sciences (AREA)
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Abstract

Un procédé de flottation cyclonique pour minerai sous forme liquide consiste à régler le diamètre moyen d'une mousse de minerai sous forme liquide dans une fourchette comprise entre 0,10 et 3,00 cm et l'épaisseur de la couche de cette mousse dans une fourchette allant de 3 à 50 cm, pendant la séparation de minerai par flottation cyclonique. Le procédé de flottation consiste à régler la distance entre le déflecteur (8) et l'entrée du minerai dans la cellule de flottation (11), à adapter l'entrée d'air par réglage de la buse (201) située sur le conduit d'entrée d'air (2) du générateur de bulles d'air (3), et à surveiller en temps réel certainsparamètres de procédure pendant la séparation du minerai. La présente invention concerne aussi une colonne de flottation à jet de cyclone appropriée au procédé de flottation cyclonique et à l'appareil de flottation comprenant ladite colonne. Les domaines d'application de l'invention portent sur la séparation de divers minerais. Le procédé et l'appareil permettent de réduire les coûts d'exploitation de la séparation des minerais et de diminuer considérablement les coûts de fabrication et de production de l'appareil de flottation. En outre, ils permettent d'économiser par exemple 65% d'énergie d'un appareil de flottation traditionnel, plus de 45% d'une colonne de flottation traditionnelle.
PCT/CN2007/001480 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 WO2008067702A1 (fr)

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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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CN104668108A (zh) * 2014-12-29 2015-06-03 山东东山王楼煤矿有限公司 用于煤泥的浮选装置和浮选方法
CN107966330A (zh) * 2018-01-24 2018-04-27 栾川龙宇钼业有限公司 一种高浓度尾矿矿浆连续取样系统
CN109453902A (zh) * 2018-12-29 2019-03-12 江苏大丰新安德矿业有限公司 一种浮磁选柱装置及组合式气泡发生器
CN110170382A (zh) * 2019-06-26 2019-08-27 绍兴金冶环保科技有限公司 叶桨式冶金浮选机
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
CN113102121A (zh) * 2021-04-15 2021-07-13 江苏仕能工业技术有限公司 一种便于清洗的浮选机
CN116273491A (zh) * 2023-05-18 2023-06-23 山东方明药业集团股份有限公司 一种用于药材的浮选设备
CN116899279A (zh) * 2023-09-13 2023-10-20 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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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
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
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CN104668108A (zh) * 2014-12-29 2015-06-03 山东东山王楼煤矿有限公司 用于煤泥的浮选装置和浮选方法
CN107966330A (zh) * 2018-01-24 2018-04-27 栾川龙宇钼业有限公司 一种高浓度尾矿矿浆连续取样系统
CN107966330B (zh) * 2018-01-24 2023-08-08 栾川龙宇钼业有限公司 一种高浓度尾矿矿浆连续取样系统
CN109453902A (zh) * 2018-12-29 2019-03-12 江苏大丰新安德矿业有限公司 一种浮磁选柱装置及组合式气泡发生器
CN109453902B (zh) * 2018-12-29 2023-11-07 江苏大丰新安德矿业有限公司 一种浮磁选柱装置及组合式气泡发生器
CN110170382A (zh) * 2019-06-26 2019-08-27 绍兴金冶环保科技有限公司 叶桨式冶金浮选机
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
CN113102121A (zh) * 2021-04-15 2021-07-13 江苏仕能工业技术有限公司 一种便于清洗的浮选机
CN113102121B (zh) * 2021-04-15 2024-04-19 江苏仕能工业技术有限公司 一种便于清洗的浮选机
CN116273491A (zh) * 2023-05-18 2023-06-23 山东方明药业集团股份有限公司 一种用于药材的浮选设备
CN116899279A (zh) * 2023-09-13 2023-10-20 江西亚非国际矿冶研究有限公司 一种智能选矿浓密机
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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