JPH03504350A - flotation device - Google Patents

Abstract

The invention relates to a flotation apparatus improving the recovery of concentrate remaining with tailing. The apparatus according to the invention comprises a cell (1) for treating the ore to be beneficiated and the materials added thereto, i.e. the head material, a feed pipe (2) leading to the cell for feeding head material into the cell (1), a froth chute (3) disposed in the top portion of the cell (1) for collecting concentrate rising up in the cell, and a discharge duct (4) disposed in the lower portion of the cell for conveying the tailing out from the cell, as well as a regulating device (5) disposed in the bottom of the cell, wherethrough compressed air and water in a finely divided mixture are supplied to the cell.

Description

[Detailed description of the invention] flotation device The present invention deals with the treatment of ores to be beneficent and the substances added to the ores, i.e. foam substances. a supply pipe leading to the cell for supplying foam material to the cell; A floss chute is placed at the top of the cell to collect the shrinkage and the cell collects the beneficiation slag. and a discharge duct arranged at the bottom for transporting the floating device.

In modern flotation cells, air is introduced into the bottom of the cell by an aerator. There is. Often special rotors or their equivalents are used to agitate the foam material at the same time. Used as an air device. Foam material is introduced into the cell from the level (height) of the stirring device. It will be done. This mechanism has the purpose of making the mixture in the cell as homogeneous as possible in a suspended state. ing. Concentrates within the foam material adhere to the air bubbles and rise with the air. The concentrate is It is collected in a concentration chamber located at the top of the bottle. The beneficiation slag is lowered down into the discharge duct or its equivalent removed from the cell. Ore is sorted using this kind of mechanism. When processing, a relatively large amount of concentrate remains in the tailings. Additionally, the equipment consumes a large amount of energy. It is expensive to configure and operate.

U.S. Patent No. 2,922,521 discloses that the foam material is passed through a pipe at the bottom of the cell. such that a “mushroom”-like movement of flow is generated within the room. , teaches an apparatus for separating minerals and other materials. The air necessary for flotation is pumped through a centrifugal pump. is added to the foam material on the suction side of the pump. Air enters the flotation chamber to feed the mixture to be beneficent beforehand, it is premixed with foam material. The agitation procedure is largely mechanical and involves large amounts of requires energy and wears out mechanical structures.

If the suspended mixture is transported over even short distances, e.g. through a pipe system, It has actually been found that the bubble dimensions are easier to grow and the flotation results are substantially improved. Ta. Keeping the bubble dimensions as small as possible consumes energy within the pipe system requires turbulent flow. U.S. Patent No. 4,639.313 from an aqueous slurry It describes a flotation device for beneficiation of minerals. This known device has an advantageous air/water mixture. It has separate and highly complex equipment for generating the compound. Advantageous bubble dimensions In maintaining the mixture, the apparatus disclosed in U.S. Pat. No. 2,922,521 The same technical problem arises.

It is an object of the present invention to provide a flotation device capable of recovering a larger amount of concentrate than prior art devices. Another object of the present invention is to provide a system having a simple structure and reliable operation. The object of the present invention is to provide a flotation device that is effective and consumes relatively little energy. Ru.

The object of the invention is achieved by a flotation device as defined in the characterizing part of the claims. .

In the flotation device of the present invention, the adjustment device is placed at the bottom of the chamber; Through the compressed air and water are separately supplied to the chamber and finely divided. at the bottom of the chamber By providing separate compressed air and water conditioning equipment, compressed air and water can be Evenly distributed in the foam material without steps. Adjustment device allows water and compressed air to be The result is that the water/air mixture is supplied to the chamber as a finely divided water/air mixture. this This means that the air bubble size within the mixture is small. Thus, air The foam efficiently transports concentrate upwards.

In an advantageous embodiment of the invention, the regulating device has a regulating element for regulating the compressed air. Compressed air duct located and water conveying water to the room in the immediate vicinity of the compressed air duct It has a duct for use. By separating the compressed air duct from the water duct, The volumes and pressures of these media can be adjusted independently of each other. Water duct orifice When the source is in close proximity to the orifice of the compressed air duct, the compressed air and water mixed effectively. Preferably, the so-called throttle member is located at the orifice of the water duct. in which the compressed air is discharged directly after the throttling member, thereby This causes an ejector phenomenon.

In one embodiment of the invention, the supply pipe is placed near the bottom of the chamber. This solution The scheme is used when concentrating foam materials with high concentrations. The water/compressed air mixture is It immediately acts on the foam material introduced into the chamber, causing the concentrate present in the foam material to adhere to the air bubbles. Rise. The slag either remains partially at the bottom of the chamber or rises a short distance and then descends.

The concentrate rises, passes through the concentration chamber, and the slag removed from the chamber passes through the discharge duct. removed.

In another embodiment of the invention, the supply pipe is arranged at a distance from the bottom of the chamber. . Some of the foam substance concentrate leaves the supply pipe and immediately attaches to the air bubbles, but the concentration The other part of the material adheres only after descending a certain distance. The slag descends directly to the bottom. Or, it rises for a distance accompanied by the current and then falls.

The invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of one cell embodiment of the flotation device of the present invention.

FIG. 2 is a side view of a multi-cell embodiment of the flotation device of the present invention.

FIG. 3 is a side view of an advantageous multi-cell embodiment of the flotation device of the present invention.

FIG. 4 is a plan view of the cell system of FIG. 3.

FIG. 5 shows the cell system of FIG. 3 viewed from direction N.

FIG. 6 shows a preliminary comparison of the efficiency of the air flotation device of the present invention with that of a conventional mechanical cell. The results of the Biflotation test are shown.

Figure 7 shows a comparison of the efficiency of the air flotation device of the present invention with that of a conventional mechanical cell. The results of the reflotation test are shown.

In the embodiment of FIG. 1, the flotation device comprises a cell (flotation i) 1, a feed pipe guided into the cell 2, a flotation chute 3, a discharge duct 1-4 led out from the cell, and a regulating device 5. have The supply pipe 2 is placed at a distance from the bottom of the cell and carries the ore to be beneficent and The substances added to the ore, the so-called head (foam) substances, are passed through the supply pipe. is supplied to the cell through the

A regulating device 5 provided at the bottom of the cell is a compressed air regulator for conveying compressed air to the cell. It has a duct 6 and a water duct 8 for conveying water to the cells. Adjustment element 7 adjusts the water amount. Correspondingly, a regulating element (not shown) is arranged in the water duct for regulating the compressed air. It is placed in the compressed air duct to regulate air. In this example, the water The regulating element is a so-called diaphragm member. The orifice of the water duct is the compressed air duct. located close to the orifice.

When operating the device, foam material is fed into the cell through the feed pipe. at the same time, A water/air mixture is supplied from the bottom of the cell by a regulator. water and air Finely divided small bubble mixture that is well mixed and effectively diffused within the cells form things.

The concentrated particles present in the foam material attach to the air bubbles and rise upward through the cell. generated The collected froth (foam) is collected in the concentration chamber 3 at the top of the chamber, from where the concentrate is transferred. be done. The beneficiary is discharged from the cell through a downward discharge duct.

In the embodiment of FIG. 2, the flotation device comprises a plurality of adjacent cells forming a cell system. has a file. The lower parts of the cells are connected to each other by openings 9. The cell system A supply pipe 2 and a discharge duct 4 are connected to the last cell. Adjustment device 5 compresses Located at the bottom of each cell to carry air and water into the chamber. At the top of each cell, A flossing chute 3 is arranged to collect concentrate from the cell.

When operating the device, foam material is supplied to the first cell via the supply pipe. concentrate A portion of It is taken out. Cell-based operations correspond to those disclosed in the previous embodiments. 1st The beneficiation from the cell becomes a foam material to the second cell, and some of the concentrate is transferred to the second cell. will be collected. The material remaining at the bottom is carried to the next cell, etc., and finally, the gangue is released into the discharge chamber. is removed from the device through duct 4.

In the advantageous embodiment shown in FIG. 3, the flotation device comprises a plurality of adjacent cells forming a cell system. It has placed cells. This device does not allow the aeration device 10 to generate too much air which is harmful to the flotation process. to remove air bubbles from the foam material! supply pipe 2 and discharge duct 4 have The supply pipe 2 is connected to the first cell and the gangue is passed from the cell through the discharge valve 12. removed. A regulator is located at the bottom of each cell to convey compressed air and water to each cell. It is located. A flossing chute 3 connects each cell to collect concentrate from the cells. placed at the top.

When operating the device, the foam material is fed into the first cell where a portion of the foam material is floated. The rest of the foam material passes through the ejector tube 11 to the next cell. carried. The operation of the cell system corresponds to that disclosed in the embodiment of FIG. 1 above. The mineral concentrate coming out of the first cell becomes foam material in the second cell, and a part of the concentrate is recycled in the second cell. will be collected. The material remaining at the bottom is carried to the next cell, etc., and finally the gangue is sent to the discharge duct 4. removed from the device through. The walls between the cells balance the pressure and level in the cell system. It has an orifice 14 for

The bottom of the cell has an orifice in the bottom corner of one side of the cell where the mineral concentrate is precipitated at the bottom of the cell. It is made to be tilted so that it can be moved through.

The precipitated mineral concentrate is circulated to the flotation device by an ejector tube structure. use This ejector arrangement has been found to be extremely efficient in experiments.

The main reason is that the beneficiation deposited at the bottom of the cell has extremely low energy consumption. is reintroduced into the flotation equipment (without a separate large, expensive pumping unit) and Therefore, the turbulent flow resulting from the violent Bon 1 action affects the suspension state, which is critical to the success of flotation. This is because it is possible to avoid causing disturbances.

The ejector tube is the part of the cell where the part of the foam material (slurry) that does not rise is directed. Located in minutes. Ejector phenomenon supplies a small amount of water into the tube at favorable pressure It is generated by

The ejector tube increases the beneficiation and enters the next cell as foam material.

In the cell of nt*, the gangue is discharged by the discharge valve 12 through the discharge duct 4 . Furthermore, the device is equipped with a level regulator 3 for controlling the discharge valve 12 in the discharge duct. is being given.

In a third embodiment of the invention, the flotation device comprises several cell systems arranged in stages with respect to each other. have In such a case, the structure of the single chamber corresponds to the structure shown in Figure 1 and the equipment Throughout the installation, the discharge duct of one cell system constitutes the supply pipe for the adjacent cell system. are doing.

In the device of the invention, flotation chemicals may be added to the water supplied from the conditioning device; In this case, there is no need to add the chemical substance early.

The following is an evaluation of the test results obtained when using the new flotation device. .

The test flotation was 1, and the invention was carried out for half a year at the apatite mine in Shirinjabi, Kemira Oy. This was done using a prototype device. The results are the machines used in the mine. It was compared with a mechanical flotation device, and the following findings were found from the comparison.

Same level of foam material inflow as mechanical cells, despite the smaller size of the device I was able to maintain it.

- With the head, the production yield obtained in the first test was on the same level as with the mechanical cell. , even clearly good in the particle size range consisting of mica by so-called inverse flotation. Preliminary tests for separation showed surprisingly good results. Thus, this test result As a result, Chemilaoi is now able to conduct extensive testing to obtain even more precise mica separation capabilities. The decision was made to order the research department to make the selection.

− The selection of minerals is based on experiments that show the efficiency of the equipment and the effectiveness of the investment cost of the equipment. A new type of air flotation device developed with a view to its overall benefits in mining is the most important It is assumed that this is important.

Regarding comparative tests, relating to the results obtained from pre-flotation and repeated flotation, respectively. 0 curves 17 and 15 with reference to FIGS. 6 and 7 respectively represent new air cells. curves 16 and 14, respectively, were obtained when using a conventional machine. This was obtained when using a target cell. The test alternates the same foam material into both cells. This was done by simultaneously supplying Measurements (concentrates, foam materials, gangue and P2 05%) was performed on the samples at the same time.

The results of preliminary flotation comparison tests show that the use of the new air cell and the known mechanical cell It has been shown that substantially better yields (approximately 10%) can be obtained than using actually reduces the amount of apatite (P2O5) remaining in the gangue.

The percentage of concentrate obtained in a repeated flotation comparison test using the novel air cell was Furthermore, it is very high, i.e. at least on the same level as in the case of using known cells. However, production is, on average, more than 10% higher.

Although the novel device has been described primarily in connection with mineral beneficiation, it may also be used to It is clear that it can also be used with foam materials whose constituent particles are desired to be sorted.

Special table 13-504350 (4) Procedural amendment (formality) %formula% 2. Name of the invention Floating selection device 3. Person making the amendment Relationship to the case: Applicant Name Hirvuonen Erzki 5. Date of amendment order: Self-issued international search report 1mema114MIA-1 anger”” PCT/F189100076

Claims (12)

[Claims] 1. A cell for processing the ore to be beneficent and the substances added to the ore, i.e. foam substances. (1) and a supply pipe leading to the cell (1) for supplying the foam substance to the cell (1). (2) and a floss chute (3) placed in the nuchal part of the cell to collect the concentrate. and a discharge duct (4) located at the bottom for conveying the beneficiation slag from the cell. In the flotation device, a regulating device (5) is arranged at the bottom of the cell, this regulating device compressed air and water are fed into the cell to form a finely divided mixture that is then prepared. The regulating device (5) is a regulator in which the adjustable element (7) is arranged to regulate the amount of water. Kano water duct (8) and the one that adjusts the air volume and is very close to the water duct (8) and an adjustable compressed air duct (6) supplying air to the cell (1). A flotation device featuring: 2. The flotation device according to claim 1, wherein the flotation device comprises a plurality of adjacently arranged flotation devices. the first cell, whereby the foam material is passed through the supply pipe (2) to the first cell. In the first cell, the foam material is flotated and the rest of the foam material is transferred to the next cell. , the final tailings is discharged from the last cell through the discharge duct (4). flotation device. 3. In the flotation device according to claim 2, the flotation device comprises a plurality of adjacently arranged flotation devices. The cell (1) is placed and supplied to remove too many air bubbles that are harmful to the flotation process. As a finely divided mixture, A regulator located at the bottom of each cell to simultaneously supply compressed air and water to the flotation device. a regulating device (5) disposed in the part of the cell where the foam material settles, and which controls the foam material in this part; It has an ejector tube (11) that raises and carries it to the next cell for reflotation. A flotation device characterized by: 4. A flotation device according to claim 2, wherein the cells have adjustable openings between the cells. A flotation device characterized in that it is interconnected by a port (9). 5. In the flotation device according to any one of claims 1 to 3, Flotation device, characterized in that the feed pipe (2) is arranged near the bottom of the cell. 6. In the flotation device according to any one of claims 1 to 3, A floating device characterized in that the feed pipe (2) is located at a distance from the bottom of the cell. Selection device. 7. In the flotation device according to claim 3, the ejector tube (11) Pumping capacity adjusts the amount of additional water supplied to the ejector tube. A flotation device characterized in that it is regulated by. 8. The flotation device according to claim 2, wherein the flotation devices are arranged in stages with respect to each other. have multiple cell systems, such that the discharge ducts from one cell system are adjacent to each other. A flotation device characterized by comprising a supply pipe of a cell system in contact with each other. 9. In the flotation device according to any one of claims 1 to 7, a water device is arranged in the conditioning device (5) for supplying the flotation chemicals to the cell together with water. A flotation device characterized by: 10. The use of the flotation device according to any one of claims 1 to 9 is A flotation device characterized in that it is for beneficiation of materials. 11. The use of the flotation device according to any one of claims 1 to 9 is A flotation device characterized in that it is for the oxidation of substances. 12. The use of the flotation device according to any one of claims 1 to 9 is A flotation device characterized in that it is used for sorting particles of substances.