CN210294865U

CN210294865U - Control device for guaranteeing automatic air supply of flotation tank

Info

Publication number: CN210294865U
Application number: CN201920954926.2U
Authority: CN
Inventors: 陶磊; 雷艳霞; 刘义伟; 林栋�; 赵裕斌; 张奉强
Original assignee: Shandong Gongdazhongneng Technology Co ltd
Current assignee: Shandong Gongdazhongneng Technology Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-04-10
Anticipated expiration: 2029-06-24

Abstract

The utility model discloses a guarantee flotation cell carries out controlling means of automatic air feed, wherein the mount is established in flotation cell central authorities upper end, it is equipped with the foam level gauge to be equipped with control valve and upper end on the mount, the lower extreme of foam level gauge stretches into the foam and supports and lean on the liquid level of ore pulp, be equipped with on the wall of flotation cell right side and mark the scale plate, it flushes with the upper end and the bottom of flotation cell respectively to mark both ends about the scale plate, be equipped with flotation foam camera on the mount, flotation foam camera will mark the PLC controller that the scale plate image was transmitted for on the mount. The utility model discloses a PLC controller detects out aeration quantity and ore pulp degree of depth respectively to gas flowmeter and foam level meter, and rethread foam camera shoots and marks the scale plate, draws the mode of comparing through the image, obtains foam thickness, again with gas flow motorised valve control aeration quantity, accomplishes the closed loop feedback control process of a foam thickness and aeration quantity, adjusts the real-time good, can effectively guarantee flotation effect and flotation efficiency.

Description

Control device for guaranteeing automatic air supply of flotation tank

Technical Field

The utility model relates to a technical field of mining flotation cell especially relates to a guarantee flotation cell carries out controlling means of automatic air feed.

Background

Along with the dilution of ore grade, the reduction of disseminated particle size and the increasing requirement on comprehensive utilization of resources, the application of the flotation process in mine enterprises is increasing day by day. Factors influencing the flotation process are many, such as ore grinding fineness, ore pulp concentration, flotation time, medicament system and the like, wherein one important factor is the influence of air supply of a flotation machine on flotation. The flotation machine must ensure that the slurry draws in a sufficient amount of air and disperses throughout the tank. Because the air dispersion is finer and more uniform, the ore particles are more likely to contact with the bubbles to form a certain foam layer thickness, the flotation efficiency is higher, but when the aeration quantity reaches a certain degree, the air density is increased, the dispersion degree begins to decrease again to form large bubbles, the collision probability of the ore particles and the bubbles is reduced, and the flotation efficiency is also reduced. Therefore, the aeration quantity of the flotation machine is controlled in a better range, the flotation efficiency can be stabilized, the flotation operation index is optimized, the aeration quantity of the flotation is generally observed manually by experience according to the foam liquid level and the height of the foam sprayed to the flotation tank, the thickness of the foam layer is approximately obtained, the aeration quantity is adjusted, the adjustment hysteresis is large, the adjustment of the aeration quantity is difficult to complete in time, the flotation is difficult to quickly react and adjust, the flotation effect is poor, and the flotation efficiency is low.

SUMMERY OF THE UTILITY MODEL

The problem to above current existence, the utility model provides a guarantee flotation cell carries out controlling means of automatic air feed adopts the PLC controller to detect out aeration quantity and ore pulp degree of depth respectively to gas flowmeter and foam level meter, rethread foam camera shoots and marks the scale plate, through the mode that the image draws the comparison, obtain foam thickness, with gas flow motorised valve control aeration quantity again, accomplish the closed loop feedback control process of a foam thickness and aeration quantity, it is good to adjust the real-time, can effectively guarantee flotation effect and flotation efficiency.

The technical scheme of the utility model lies in:

the utility model provides a guarantee flotation cell carries out controlling means of automatic air feed, including control valve, foam level gauge and mount, the mount is fixed to be set up in flotation cell central authorities upper end, ore pulp and foam are equipped with in the flotation cell, the foam covers on the ore pulp liquid level, be equipped with the control valve on the mount and the fixed foam level gauge that is provided with in upper end, the lower extreme of foam level gauge stretches into the foam and supports and lean on the liquid level of ore pulp, vertically on the wall of flotation cell right side be provided with and mark the scale plate, mark the upper and lower both ends of scale plate and flush with the upper end and the bottom of flotation cell respectively, it is equipped with the flotation foam camera to correspond towards marking the scale plate on the mount, the flotation foam camera will mark the scale plate image and transmit the PLC controller on the mount;

the control valve is an electric valve for gas flow, the PLC is respectively and electrically connected with the gas flowmeter, the electric valve for gas flow, the flotation foam camera and the foam liquid level meter, so that the gas flowmeter, the flotation foam camera and the foam liquid level meter are used as detection ends, and the electric valve for gas flow is used as a response end to form a closed-loop control loop for inflation quantity and foam thickness.

Furthermore, a floating ball is arranged at the lower end of the foam liquid level meter, and the floating ball is immersed at the bottom of the foam but suspended on the liquid level of the ore pulp to obtain the depth of the ore pulp in the flotation tank.

Furthermore, mark the scale plate totally a plurality ofly, and respectively vertical parallel arrangement in proper order is on the lateral wall of flotation cell, the regional all scale plates that mark that cover of shooing of foam camera make things convenient for the PLC controller to obtain the average value of foam upper end on marking the scale plate.

The utility model discloses owing to adopted above-mentioned technique, make it compare specific positive beneficial effect with prior art and be:

adopt PLC controller to detect inflation volume and ore pulp degree of depth respectively to gas flowmeter and foam level meter, rethread foam camera shoots and marks the scale plate, draws the mode of comparing through the image, obtains the foam thickness, controls the inflation volume with gas flow motorised valve again, accomplishes the closed loop feedback control process of a foam thickness and inflation volume, adjusts the real-time good, can effectively guarantee flotation effect and flotation efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: the method comprises the following steps of 1-a PLC controller, 2-a display screen, 3-a gas flowmeter, 4-a gas flow electric valve, 5-a flotation foam camera, 6-a marked scale plate, 7-ore pulp, 8-a flotation tank, 9-foam and 10-a foam liquid level meter.

Detailed Description

The first embodiment is as follows:

as shown in the attached drawing 1, the utility model provides a guarantee flotation cell carries out controlling means of automatic air feed, including gas flow motorised valve 4, foam level gauge 10 and mount, the mount is fixed to be set up in flotation cell 8 central upper end, flotation cell 8 is equipped with ore pulp 7 and foam 9 in, foam 9 covers on 7 liquid levels of ore pulp, be equipped with gas flow motorised valve 4 and the upper end is fixed to be provided with foam level gauge 10, the lower extreme of foam level gauge 10 is equipped with the floater, the floater is immersed in the bottom of foam 9 but the suspension is on 7 liquid levels of ore pulp, reachs the degree of depth of ore pulp 7 in flotation cell 8;

four marking scale plates 6 which are parallel to each other are vertically arranged on the right side wall of the flotation tank 8, and the upper end and the lower end of each marking scale plate 6 are respectively flush with the upper end and the bottom of the flotation tank 8;

the flotation foam 9 camera 5 is arranged on the fixing frame correspondingly towards the marking scale plate 6, the photographing area of the foam 9 camera covers all the marking scale plates 6, the flotation foam 9 camera 5 transmits the image of the marking scale plates 6 to the PLC controller 1 on the fixing frame, the PLC controller 1 judges the height of the liquid level of the foam 9 shown by each marking scale plate 6 through an image extraction and comparison technology, and then the average value of the height of the liquid level of the foam 9 is obtained, so that errors caused by the unevenness of the foam 9 can be effectively eliminated, and the accurate detection height of the liquid level of the foam 9 is obtained;

PLC controller 1 respectively with gas flowmeter 3, gas flow motorised valve 4, flotation foam 9 camera 5 and foam level gauge 10 electric connection for gas flowmeter 3, flotation foam 9 camera 5 and foam level gauge 10 are as the detection end, and gas flow motorised valve 4 is as the response end, form the control circuit of the aeration rate of a closed loop and foam 9 thickness.

When in actual use, adopt PLC controller 1 to detect out aeration quantity and 7 depths of ore pulp respectively to gas flowmeter 3 and foam level gauge 10, rethread foam 9 camera is shot and is marked scale plate 6, the mode of comparing is drawed through the image, obtain foam 9 liquid level detection height, foam 9 liquid level detection height subtracts ore pulp 7 depths and can reachs, and show the parameter on display screen 2, make things convenient for operating personnel to observe in real time, control the aeration quantity with gas flow motorised valve 4 again, accomplish the closed loop feedback control process of a foam 9 thickness and aeration quantity, it is good to adjust the real-time, can effectively guarantee flotation effect and flotation efficiency, wherein gas flowmeter 3 is bayonet thermal flowmeter, be the instrument that utilizes the thermal diffusion principle to measure gas flow, the measurement accuracy is high, easy to assemble, easy to maintain. The gas flow electric valve 4 is an inlet electric butterfly valve, the reaction is sensitive, the size is small, and the opening degrees of the gas flow and gas flow electric valve 4 are displayed on the display screen 2.

It should be noted that the range of suitable froth 9 layer thicknesses will be different for different mineral flotation processes, or for different flotation stations. A thicker foam 9 layer is required in the concentration operation to ensure that high-quality concentrate is obtained; in roughing and scavenging operations, a thin layer of foam 9 is required to ensure that the less floatable minerals and part of the consortium are recovered as much as possible. The appropriate thickness of the foam 9 layer is obtained by process investigation of different sections of different mineral flotation, the investigated appropriate thickness range (including an upper limit value and a lower limit value) of the foam 9 layer is input into the PLC 1, and the PLC 1 takes the thickness range as an interpretation reference; the PLC 1 compares the detected thickness value of the foam 9 layer with a reference value, when the thickness of the foam 9 layer is judged to be abnormal, a phenomenon that the flotation tank 8 overflows or falls is possible, the PLC 1 further judges that the liquid level of the flotation pulp 7 is normal and the dosage is normal, the PLC 1 adjusts the gas flow electric valve 4 of the air supply pipeline of the flotation tank 8 through a control model, the flotation air supply quantity is adjusted to a proper range, when the control system judges that the thickness value of the foam 9 layer is smaller than the lower limit value of the thickness range of the foam 9 layer, the gas flow electric valve 4 is adjusted by increasing the opening, and when the thickness value is detected to reach the proper range, the adjustment is stopped; conversely, when the detected thickness value is greater than the upper limit value of the appropriate range, the opening degree of the gas flow rate electric valve 4 is adjusted to be decreased. Therefore, the thickness of flotation foam 9 is stabilized, the flotation efficiency is stabilized, and the flotation operation index is optimized.

Claims

1. The utility model provides a guarantee flotation cell carries out controlling means of automatic air feed, includes control valve, foam level gauge and mount, the mount is fixed to be set up in flotation cell central authorities upper end, ore pulp and foam are equipped with in the flotation cell, the foam covers on the ore pulp liquid level, be equipped with the fixed foam level gauge that is provided with in control valve and the upper end on the mount, the lower extreme of foam level gauge stretches into the foam and supports and lean on the liquid level of ore pulp, its characterized in that: a marking scale plate is vertically arranged on the right side wall of the flotation tank, the upper end and the lower end of the marking scale plate are respectively flush with the upper end and the bottom of the flotation tank, a flotation foam camera is arranged on the fixing frame correspondingly towards the marking scale plate, and an image of the marking scale plate is transmitted to the PLC on the fixing frame by the flotation foam camera;

2. The control device for ensuring automatic air supply of the flotation cell according to claim 1, wherein: and a floating ball is arranged at the lower end of the foam liquid level meter, is immersed at the bottom of the foam but is suspended on the liquid level of the ore pulp, and obtains the depth of the ore pulp in the flotation tank.

3. A control device for ensuring automatic air supply of a flotation cell according to claim 1 or 2, wherein: the marking scale plates are multiple and are respectively vertically arranged on the side wall of the flotation tank in parallel in sequence, the photographing area of the foam camera covers all the marking scale plates, and the PLC is convenient to obtain the average value of the upper end of the foam on the marking scale plates.