CN215843609U - Flotation machine is used in laboratory - Google Patents

Abstract

The utility model provides a flotation machine for a laboratory, which belongs to the technical field of mineral processing and comprises a machine body, a workbench, a flotation tank, a scraper device, a stirring device, a water replenishing device, an aerating device and a control device, wherein the control device is arranged on the machine body, and a liquid level sensor, an air valve, a flowmeter, the scraper device, the stirring device, the water replenishing device and the aerating device are all electrically connected with the control device. The flotation machine for the laboratory, provided by the utility model, can realize automatic control on the scraper device, the aerating device, the stirring device and the water replenishing device, reduce manual operation, reduce the labor intensity of experimenters, reduce the influence of human factors on experimental indexes, improve the accuracy and repeatability of the experimental indexes and improve the precision of experimental results.

Description

Flotation machine is used in laboratory

Technical Field

The utility model belongs to the technical field of mineral processing, and particularly relates to a flotation machine for a laboratory.

Background

Flotation is a technical method for separating useful minerals from ores according to the difference of the physicochemical properties of the surfaces of mineral particles, and is widely applied to the separation of fine and ultra-fine materials. Flotation machines are mechanical devices that perform the flotation process. In the flotation machine, the slurry which reacts with the chemical agent is aerated by stirring, so that some ore particles are selectively fixed on the air bubbles, the slurry floats to the surface of the slurry and is scraped to form foam products, and the rest part of the slurry is kept in the slurry, so as to achieve the purpose of separating minerals.

In the process of mineral flotation in a laboratory, water replenishing and chemical adding are indispensable operations in a flotation tank, but the existing flotation machine in the laboratory is also a conventional flotation machine and is low in automation degree, the experimental process is basically adjusted by manual operation of laboratory personnel, the operator needs to stare a stopwatch and a liquid level all the time in the experimental process, the operations of chemical adding, gas charging, foam scraping switch opening, water replenishing and the like are completed manually and sequentially, errors such as insufficient or excessive water replenishing, untimely opening and closing of a gas charging valve and the like easily occur, the influence of human factors on the accuracy and repeatability of flotation indexes is increased excessively, and the accuracy of experimental results, the accuracy of flotation indexes and the experimental repeatability are low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a flotation machine for a laboratory, which can reduce the labor intensity, reduce errors caused by human factors and improve the accuracy and repeatability of experimental indexes.

In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a laboratory flotation machine comprising: the flotation device comprises a machine body, a workbench, a flotation tank, a scraper device, a stirring device, a water replenishing device, an inflating device and a control device, wherein the machine body comprises a machine body, a base arranged at the bottom of the machine body and a cantilever arranged at the upper part of the machine body; the workbench is arranged on the base; the flotation tank is supported on the workbench; a liquid level sensor is arranged on the flotation tank; the scraper device is arranged on a cantilever at the upper part of the machine body; the stirring device is arranged at the top of the machine body; a stirring shaft of the stirring device extends downwards into the flotation tank; the water replenishing device is communicated with the flotation tank through a water conveying pipe; the air charging device is arranged on the machine body and is communicated with the central cavity of the stirring shaft through an air delivery pipe, an air valve is arranged on the air delivery pipe, and a flowmeter connected with the air charging device is arranged on the machine body; the control device is arranged on the machine body, and the liquid level sensor, the air valve, the flowmeter, the scraper device, the stirring device, the water supplementing device and the air charging device are electrically connected with the control device.

In one possible implementation, the workbench is a worm and screw lifting workbench.

In a possible implementation manner, an operating hand wheel is arranged at the end part of the worm wheel screw rod lifting type workbench.

In one possible implementation, the water delivery pipe is a transparent soft rubber pipe.

In one possible implementation, the liquid level sensor is a piezoresistive liquid level sensor and is installed at the bottom of the flotation tank.

In a possible implementation manner, the flotation tank is provided with a thread sleeve facing one side of the machine body, a locking screw rod in threaded connection with the thread sleeve penetrates through the machine body, and the locking screw rod is in threaded connection with the machine body.

In a possible implementation manner, the water supplementing device comprises a water tank and a water pump communicated with the water tank, and the water tank is a transparent glass tank.

In a possible implementation mode, the scraper device comprises a bubble scraping motor, a rocker arm connected with the bubble scraping motor, a rotating shaft connected with the rocker arm and a scraper connected to the rotating shaft, and the bubble scraping motor is installed on a cantilever on the upper portion of the machine body.

In a possible implementation manner, a flow stabilizing partition plate is arranged in the flotation tank, the flow stabilizing partition plate is perpendicular to the vertical axis of the flotation tank, and a shaft hole through which the stirring shaft passes and a plurality of flow holes through which ore pulp flows are formed in the flow stabilizing partition plate.

In a possible implementation manner, a support for supporting the flow stabilizing partition plate is arranged in the flotation tank main body.

The flotation machine for the laboratory provided by the utility model has the beneficial effects that: through the signals fed back by the control device, the displacement sensor and the flowmeter, the automatic control over the scraper device, the inflation device, the stirring device and the water replenishing device can be realized, the manual operation is reduced, the labor intensity of experimenters is reduced, the influence of human factors on experimental indexes is reduced, the accuracy and the repeatability of the experimental indexes are improved, and the precision of experimental results is improved.

Drawings

Fig. 1 is a schematic structural diagram of a laboratory flotation machine provided in an embodiment of the present invention;

FIG. 2 is a schematic side view of the laboratory flotation machine provided in FIG. 1;

FIG. 3 is a schematic view of the squeegee assembly provided in FIG. 1;

FIG. 4 is a schematic view of the flotation cell of FIG. 1 connected to a locking screw;

fig. 5 is a schematic top view of a cell body of a laboratory flotation machine according to an embodiment of the present invention;

FIG. 6 is a sectional view taken along line A-A of FIG. 5;

description of reference numerals:

1. a squeegee assembly; 101. a squeegee; 102. a rotating shaft; 103. a foam scraping motor; 104. a rocker arm; 2. a liquid level sensor; 3. a work table; 4. a stirring device; 41. an impeller; 42. a stirring motor; 43. a stirring shaft; 5. a flow stabilizing baffle plate; 51. a shaft hole; 52. a wing plate; 53. a flow-through hole; 6. a flotation cell; 7. a control device; 8. a water tank; 9. a water pump; 10. a base; 11. locking the screw rod; 12. a body; 13. a gas delivery pipe; 14. an air pump; 15. a protective cover; 16. a water delivery pipe; 17. operating a hand wheel; 18. an air valve; 19. a flow meter; 20. a cantilever.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 and 2 together, a laboratory flotation machine according to the present invention will now be described. The laboratory flotation machine comprises a machine body, a workbench 3, a flotation tank 6, a scraper device 1, a stirring device 4, a water supplementing device, an aerating device and a control device 7, wherein the machine body comprises a machine body 12, a base 10 arranged at the bottom of the machine body 12 and a cantilever 20 arranged at the upper part of the machine body 12; the workbench 3 is arranged on the base 10; the flotation tank 6 is supported on the workbench 3; the flotation tank 6 is provided with a liquid level sensor 2; the scraper device 1 is arranged on a cantilever at the upper part of the machine body; the stirring device 4 is arranged at the top of the machine body of the cantilever 20; the stirring shaft 43 of the stirring device 4 extends downwards into the flotation tank 6; the water replenishing device is communicated with the flotation tank 6 through a water conveying pipe 16; the inflation device is arranged on the machine body 12 and is communicated with the central cavity of the stirring shaft 43 through a gas pipe 13, a gas valve 18 is arranged on the gas pipe 13, and a flow meter 19 connected with the inflation device is arranged on the machine body 12; the control device 7 is arranged on the machine body 12, and the liquid level sensor 2, the air valve 18, the flowmeter 19, the scraper device 1, the stirring device 4, the water replenishing device and the air charging device are all electrically connected with the control device 7.

Compared with the prior art, the laboratory flotation machine that this embodiment provided, through the signal of controlling means 7 and displacement sensor and 19 feedbacks of flowmeter, can realize the automatic control to scraper means 1, aerating device, agitating unit 4 and moisturizing device, reduce artifical manually operation, reduce experimenter's intensity of labour, reduce the influence of human factor to the experimental index, improve experimental index degree of accuracy and repeatability, improve the experimental result precision.

A PLC control system is arranged in the control device 7, and the PLC control system includes a central processing unit, a memory, an input interface, an output interface, a programmer, an actuator, and a control panel. Experimental conditions are selected or input through a PLC control panel, the quantity, the dose and the dose ratio of an output experimental sample are calculated through a PLC, and meanwhile, the functions of history recording and automatic association display are expanded; inputting the flotation operation steps and related parameters into a PLC control system through an input interface by a PLC control panel, and editing the flotation operation steps and related parameters by using a programmer of the PLC control system, so that the PLC control system controls the stirring mechanism and the froth scraping mechanism of the laboratory flotation machine to be switched on and off through an actuator; connecting a signal of a liquid level sensor 2 of the automatic water replenishing device into a PLC control system, and controlling a water pump 9 to replenish water through the PLC according to the set water replenishing liquid level requirement; meanwhile, the PLC control system is expanded with a timer function and a voice broadcasting function. The control panel of the PLC control system is arranged on the machine body 12, and the machine body 12 is provided with a main power switch.

The PLC control system in the embodiment can be directly purchased by selecting proper models and manufacturers.

As shown in fig. 1 and 2, in the embodiment, the working table 3 is a worm screw elevating type working table 3 for facilitating the elevating of the flotation tank 6.

As shown in the embodiment of fig. 1 and 2, for the convenience of operation, an operation hand wheel 17 is provided at an end of the worm wheel screw elevating table 3.

As a modified embodiment, as shown in fig. 2, the water pipe 16 is a transparent soft rubber pipe. The interface of the water pipe 16 and the flotation tank 6 is made of transparent organic glass with high density, and has high corrosion resistance. The water delivery pipe 16 is connected by threads, so that the connection by glue is avoided, and the unreliable connection can cause corrosion. The two ends of the water pipe 16 can be inserted by pipe joints.

As a modified embodiment, as shown in fig. 1 and 2, the level sensor 2 is a piezoresistive level sensor and is installed at the bottom of the flotation tank 6. The liquid level sensor 2 adopted in this embodiment adopts a high-performance diffused silicon piezoresistive pressure sensor as a measuring element, and accurately measures the hydrostatic pressure proportional to the liquid level depth, and converts the hydrostatic pressure into a standard (current or voltage) signal through a signal conditioning circuit for output, so as to establish a linear corresponding relationship between an output signal and the liquid depth, and realize the measurement of the liquid depth. The liquid level sensor 2 is a stainless steel body, is made of PTFE materials and can resist corrosion, and the measuring range is 1 m.

As shown in fig. 1 and 4, a thread sleeve is arranged on one side of the flotation tank 6 facing the machine body 12, a locking screw rod 11 which is in threaded connection with the thread sleeve is arranged through the machine body 12, and the locking screw rod 11 is in threaded connection with the machine body 12. The locking screw rod 11 is connected with or separated from the thread bush by rotating the locking screw rod 11, and the flotation tank 6 is locked on the workbench 3.

Fig. 1 and 2 show an embodiment of the water replenishing device, the water replenishing device comprises a water tank 8 and a water pump 9 communicated with the water tank 8, and the water tank 8 is a transparent glass tank. The water pump 9 adopts miniature gear pump gear, and the PEEK material, the shell adopts stainless steel material, can realize 1 rpm's resolution ratio.

As shown in fig. 1 and fig. 3, the squeegee device 1 provided in this embodiment includes a bubble scraping motor 103, a swing arm 104 connected to the bubble scraping motor 103, a rotating shaft 102 connected to the swing arm 104, and a squeegee 101 connected to the rotating shaft 102, wherein the bubble scraping motor 103 is mounted on a cantilever 20 at an upper portion of the body 12. The scraper 101 rotates with the rocker arm 104 and the rotating shaft 102, so that the bubbles can be scraped away.

The stirring device provided in this embodiment includes a stirring motor 42, a stirring shaft 43, and an impeller 41 connected to a lower end of the stirring shaft 43. Wherein a protective cover 15 for the stirring motor 42 is provided on the top of the body 12.

When the tailings need to be discharged, the locking screw rod 11 is loosened, the workbench is lowered, the stirring shaft leaves the flotation tank, then the flotation tank is taken down, and the tailings can be obtained by filtering with a filter.

As a modified embodiment, as shown in fig. 5 and 6, a flow stabilizing partition plate 5 is arranged in the flotation tank 6, the flow stabilizing partition plate 5 is perpendicular to the vertical axis of the flotation tank 6, and the flow stabilizing partition plate 5 is provided with a shaft hole 51 through which the stirring shaft 43 passes and a plurality of flow holes 53 through which the slurry flows. The laboratory that this embodiment provided is with flotation device adds at 6 inner walls of flotation cell and establishes stationary flow baffle 5 backs, and the lower part stirring significantly reduces the disturbance on the froth layer, is favorable to promoting the flotation stirring speed, strengthens the mineralize mineralization effect of ore pulp, improves the concentrate extraction rate.

As an embodiment of the flow stabilizing baffle 5, as shown in fig. 6, the flow stabilizing baffle 5 includes a plurality of baffle blocks, and the baffle blocks are detachably spliced to form the complete flow stabilizing baffle 5. By the split design of the flow-stabilizing partition plate 5, as shown in fig. 6, for example, the flow-stabilizing partition plate 5 can be divided into two and two partition plate blocks; the flow stabilizing baffle 5 can also be divided into three or four parts. So as to facilitate the installation and the maintenance requirements of the flotation machine stirring device 4.

As a connection manner between the partition plate blocks, as shown in fig. 6, the partition plate blocks are detachably connected by bolts. Alternatively, the two partition plates can be connected by clamping, inserting, jackscrew or pin.

As shown in fig. 6, in addition to a plurality of partition plates, each partition plate is provided with a fin 52 extending upward along the inner diameter of the shaft hole 51 and a joint, and the partition plates are integrally connected by bolts penetrating the fins 52. The wings 52 form a sleeve around the stirring shaft 43 at the location of the shaft hole 51, and the plurality of equally divided portions may be connected together by a pipe clamp, bolts, or the like.

The utility model discloses a flotation machine for a laboratory, which comprises the following specific working steps:

firstly, inputting or selecting experimental conditions including selection of the volume of a flotation tank 6, ore pulp concentration, medicament type and dosage, aeration quantity, stirring speed and the like in a PLC control panel when starting use; it is stated here that dosing is a necessary process for the flotation machine, and dosing devices are also prior art, and therefore no dosing device is described herein;

step two, preparing samples, medicaments and equipment required by the experiment after the experiment condition is determined, turning on a power switch, and adding water into the flotation tank 6 to a first marking line according to the set operation steps and the voice prompt;

starting a flotation machine stirring device 4 through a PLC control panel, adding the weighed coal sample into a flotation tank 6 to be accurate to 0.1g, stirring until the coal sample is completely wetted, and adding water to enable the liquid level of the coal slurry to reach a second marking;

step four, starting a timing function and a voice broadcasting function of the PLC control system, adding a collecting agent by an operator through voice broadcasting when the program is set to be 115s, adding a foaming agent by the operator through voice broadcasting after 55s, opening an air valve 18 by the operator through voice broadcasting after 5s, automatically starting an air pump 14 and a scraper device 1 by the PLC control system, and collecting the concentrate into a concentrate tray;

step five, detecting the position of the liquid level by a pressure liquid level sensor in the foam scraping process, transmitting a signal to a PLC control system, automatically starting a micro gear pump by the PLC control system when the liquid level is lower than a set position, adding water in a water tank 8 into a flotation tank 6 through a water conveying pipe 16, transmitting the signal to the PLC control system by a liquid level sensor 2 when the liquid level reaches the set position, automatically closing the micro gear pump by the PLC control system to stop adding water, and carrying out normal stirring, flotation and foam scraping;

step six, when the foam is scraped for 175s, voice broadcasting of ' countdown 3, 2 and 1 is finished', an operator closes the air valve 18, meanwhile, the PLC control system automatically closes the air pump 14 and the scraper device 1, the operator puts the tail coal into a special container, particles deposited at the lower part of the flotation tank 6 are cleaned into the tail coal container, particles adhered to the lip edge and the tank wall of the scraper device 1 and the flotation tank 6 are collected into a clean coal product, clear water is added into the flotation tank 6, and the flotation machine is started to stir and clean until the flotation tank 6 is clean.

And seventhly, when the voice broadcasting of ' countdown 3, 2 and 1 is finished', stopping the scraper device 1, the air inflation valve 18, the stirring device 4 and the like in sequence, and finishing a flotation experiment.

And step eight, taking down the scraper and washing. The flotation tank 6 is taken down, and after tailings are collected, the flotation machine is cleaned in time. And (5) arranging the experimental instruments and cleaning the field.

The laboratory that this embodiment provided is with flotation device can reach following effect through installing PLC control system additional:

(1) the device can automatically calculate the required experimental sample amount, the required medicament amount and the required medicament ratio, has the functions of history recording and selection, and greatly reduces the manual calculation amount.

(2) Utilize PLC control system, can the self stabilization of automatic control liquid level, control agitating unit 4, scraper means 1's switch utilizes extension timer and voice broadcast function to realize in time adding the medicament in order, and the at utmost has reduced the possibility of artifical maloperation.

(3) The flotation process is intelligently controlled by a PLC control system, so that errors of manual operation are avoided, and the accuracy of flotation indexes and the repeatability of experiments are improved.

(4) The coal powder is adopted for carrying out the flotation experiment, the conventional experiment adopts the traditional manual operation, five times of repeated flotation experiments are carried out, the yields of clean coal are 68.65%, 68.76%, 70.37%, 69.78% and 69.97% respectively, the average value of the yields of the clean coal is 69.51%, and the total standard deviation of the experiment is 0.68%; the intelligent flotation machine is used for flotation, five times of repeated experiments are carried out under the same experiment conditions, the yields of clean coal are 68.89%, 69.45%, 70.45%, 70.06% and 69.96% respectively, the average value of the yields of the clean coal is 69.76%, and the total standard deviation of the experiments is 0.54%. Compared with the prior art, the method has the advantages that under the premise that the experimental conditions are not changed, the yield of clean coal is improved by 0.25%, the total standard deviation is reduced by 0.14% by using the intelligent flotation machine, and the repeatability of the flotation experiment is greatly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A laboratory flotation machine, comprising:

the machine body comprises a machine body, a base arranged at the bottom of the machine body and a cantilever arranged at the upper part of the machine body;

the workbench is arranged on the base;

the flotation tank is supported on the workbench; a liquid level sensor is arranged on the flotation tank;

the scraper device is arranged on a cantilever at the upper part of the machine body and is positioned at the upper part of the discharge end of the flotation tank;

the stirring device is arranged at the top of the machine body; a stirring shaft of the stirring device extends downwards into the flotation tank;

the water replenishing device is communicated with the flotation tank through a water conveying pipe;

the inflation device is arranged on the machine body and is communicated with the central cavity of the stirring shaft through a gas pipe, the gas pipe is provided with a gas valve, and the machine body is provided with a flowmeter connected with the inflation device; and

the control device is arranged on the machine body, and the liquid level sensor, the air valve, the flowmeter, the scraper device, the stirring device, the water replenishing device and the air charging device are electrically connected with the control device.

2. The laboratory flotation machine of claim 1, wherein the table is a worm screw lift table.

3. The laboratory flotation machine of claim 2, wherein the worm of the worm-and-wheel screw elevating table is provided with an operating hand wheel at an end thereof.

4. The laboratory flotation machine of claim 1, wherein the water duct is a transparent soft rubber tube.

5. The laboratory flotation machine of claim 1, wherein the level sensor is a piezoresistive level sensor mounted to the bottom of the flotation cell.

6. The laboratory flotation machine of claim 1, wherein the flotation cell is provided with a threaded sleeve on a side facing the body, and wherein a locking screw is provided through the body and threadedly connected to the threaded sleeve, the locking screw being threadedly connected to the body.

7. The laboratory flotation machine of claim 1, wherein the water replenishment device comprises a water tank and a water pump in communication with the water tank, the water tank being a clear glass tank.

8. The laboratory flotation machine of claim 1, wherein the scraper means comprises a froth scraping motor, a rocker arm connected to the froth scraping motor, a rotating shaft connected to the rocker arm, and a scraper connected to the rotating shaft, wherein the froth scraping motor is mounted on a cantilever at an upper portion of the machine body.

9. The laboratory flotation machine of claim 1, wherein a flow stabilizing partition is disposed in the flotation tank, the flow stabilizing partition is perpendicular to a vertical axis of the flotation tank, and the flow stabilizing partition is provided with an axial hole for the agitation shaft to pass through and a plurality of flow holes for slurry to flow through.

10. The laboratory flotation machine of claim 9 wherein a support frame is provided within the flotation cell body to support the flow-stabilizing baffle.

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