JP2013180289A - Flotation machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flotation machine which prevents trouble although coarse particles are supplied thereto.SOLUTION: A flotation machine includes a flotation tank 10 which is supplied with slurry containing minerals, an air supply means 20 which supplies air to the slurry, a stirring means 20 which stirs the slurry, and a coarse particle outlet 15 which is installed in the vicinity of the bottom of the flotation tank 10 and discharges the coarse mineral particles. The coarse particle outlet 15 is provided with a valve 16 which can control the discharge amount. The flotation machine 1 can be protected from trouble because the coarse particles can be discharged from the coarse particle outlet 15 although the coarse particles 15 are supplied thereto.

Description

  The present invention relates to a floatation machine. More specifically, it relates to an agitaire type flotation machine.

  The converter calami produced in the smelting process of smelting copper metal from copper ore contains about 6-10% copper. This converter calami is crushed by a crusher, then water is added to grind it as a slurry, and it is supplied to the flotation process. In the flotation process, a foaming agent, a collecting agent, a pH adjusting agent, etc. are added to the slurry converter calami and supplied to the flotation machine. And the copper content in a converter calami is collect | recovered as a calami concentrate, and is processed as a raw material of metallic copper with a copper ore.

An agitaire type float separator is known as a float separator (for example, Patent Document 1).
In the agitaire-type flotation beneficiator, the copper mineral in the converter calami is surface-modified with a collector or the like, adheres to the bubble surface, and is recovered as a float with the bubbles. Further, converter calami that has not adhered to the bubbles is discharged to the outside as a deposit.

In flotation, since the particle size of the supplied mineral is important, the converter calami after being classified by a classifier such as a cyclone is supplied to the flotation machine. However, there are cases where coarse particles with coarse particle sizes are supplied to the flotation machine, such as when classification is insufficient.
When coarse particles are supplied to an agitaire type flotation machine, the coarse particles are deposited in the flotation tank, causing a problem. In particular, converter calami has a higher specific gravity than other minerals, so that coarse particles tend to settle in the flotation tank.

Japanese Patent Publication No. 47-17129

  In view of the above circumstances, an object of the present invention is to provide a flotation machine capable of preventing problems even when coarse particles are supplied.

The flotation machine of the first invention includes a flotation tank to which a slurry containing mineral is supplied, an air supply means for supplying air to the slurry, a stirring means for stirring the slurry, and a bottom of the flotation tank And a coarse particle outlet provided in the vicinity for discharging coarse particles of the mineral.
According to a second aspect of the present invention, in the first aspect of the present invention, the coarse particle discharge port is provided with a valve capable of adjusting a discharge amount.
According to a third aspect of the present invention, in the first or second aspect, the coarse particle discharge port is provided in a position far from the slurry supply position in the flotation tank.

According to the first aspect of the invention, even if coarse particles are supplied, they can be discharged from the coarse particle discharge port, so that it is possible to prevent the flotation machine from malfunctioning.
According to the second invention, the amount of the slurry discharged together with the coarse particles can be adjusted.
According to the 3rd invention, the residence time of the slurry in a flotation tank is securable for a long time.

It is a longitudinal cross-sectional view of the flotation machine based on one Embodiment of this invention. It is the II-II arrow directional cross-sectional view in FIG.

Next, an embodiment of the present invention will be described with reference to the drawings.
A flotation machine 1 according to an embodiment of the present invention is a flotation machine used to recover copper from converter calami produced in a smelting process of smelting metallic copper from copper ore.
As shown in FIG. 1, the flotation machine 1 is an agitaire type flotation machine, and introduces air into the flotation tank 10 to which slurry containing converter calami is supplied and the slurry in the flotation tank 10. And a stirrer 20 for stirring.

  A vertical cylindrical slurry supply port 11 is provided at one end of the flotation tank 10 so that the slurry is supplied from the slurry supply port 11. The slurry supplied from the slurry supply port 11 is obtained by crushing the converter calami with a crusher, adding water to polish it into a slurry, and adding a foaming agent, a collection agent, and pH adjustment necessary for flotation. It was obtained by adding an agent or the like.

  The stirrer 20 includes a hollow shaft portion 21, a disc 22 provided at the lower end of the shaft portion 21, and a plurality of blades 23 provided so as to hang down along the outer periphery of the disc 22. . In addition, a plurality of baffle plates 24 are erected on the bottom surface of the flotation tank 10 so as to surround the periphery of the blades 23.

The stirrer 20 is connected to a motor (not shown) at the upper end of the shaft portion 21, and is rotated by driving the motor so that the slurry can be stirred by the blades 23. Air is pumped into the shaft portion 21 so that air can be supplied to the slurry from the lower end of the shaft portion 21.
The stirrer 20 corresponds to the stirring means and the air supply means described in the claims.

  When the agitator 20 rotates while supplying air, the supplied air is divided by the blades 23 and bubbles are generated in the slurry. Further, the baffle plate 24 prevents the slurry from being swirled and strengthens the stirring. As a result, the copper content in the converter calami adheres to the generated bubbles and rises to the slurry liquid surface to become floating ore. Then, as shown in FIG. 2, the floating ore overflowing from the side wall 12 of the flotation tank 10 is received and collected by the flotation pit 31.

In the flotation tank 10, a slurry interface adjustment gate 13 is provided at an end facing the slurry supply port 11 with the stirrer 20 interposed therebetween. The slurry interface adjustment gate 13 can be adjusted in the vertical position by a handle (not shown). The converter calami that has not adhered to the bubbles overflows the upper edge of the slurry interface adjusting gate 13 as sedimentation and is discharged to the sedimentation pit 32.
A partition wall 14 is provided between the stirrer 20 and the slurry interface adjustment gate 13 to block the vicinity of the slurry liquid level so that floating ore does not flow to the slurry interface adjustment gate 13.

  On the side wall of the flotation tank 10 provided with the slurry interface adjusting gate 13, a coarse particle discharge port 15 is provided in the vicinity of the bottom. The coarse particle outlet 15 communicates the inside of the flotation tank 10 with the sedimentation pit 32. A gate valve 16 is provided at the end of the coarse particle outlet 15 on the side of the sedimentation pit 32. The gate valve 16 can adjust the opening / closing amount and opening / closing amount of the coarse particle discharge port 15.

When the slurry supplied to the flotation machine 1 contains coarse converter grain (coarse particles), the coarse particles are deposited in the flotation tank 10. The deposited coarse particles obstruct the stirring of the slurry and cause flotation problems. Here, for example, the particle size of the converter calami suitable for flotation is several tens to several hundred μm, whereas the particle size of the coarse particles is several mm.
Therefore, when coarse particles are deposited in the flotation tank 10, the gate valve 16 is opened and the coarse particles are discharged from the coarse particle discharge port 15 to the sedimentation pit 32. Here, the coarse particles are discharged on the flow of the slurry discharged from the coarse particle discharge port 15.

  As described above, the flotation machine 1 can discharge the coarse particles from the coarse particle discharge port 15 even if the coarse particles are supplied. Therefore, the sedimentation of the coarse particles can be eliminated and prevented. Therefore, flotation of converter calami can be performed stably and efficiently.

  Moreover, since the discharge amount from the coarse particle discharge port 15 can be adjusted by the gate valve 16, the amount of the slurry discharged together with the coarse particles can be adjusted. Therefore, a decrease in flotation efficiency can be suppressed.

  Furthermore, in this embodiment, the coarse particle discharge port 15 is provided in the position farthest from the slurry supply port 11 (slurry supply position) in the flotation tank 10. By arrange | positioning in this way, the residence time of the slurry in the flotation tank 10 is securable for a long time. Therefore, a decrease in flotation efficiency can be suppressed.

(Other embodiments)
In the above embodiment, the coarse particle discharge port 15 is configured to communicate with the sedimentation slag 32 and the coarse particles are discharged to the sedimentation sediment 32. Instead, the coarse particle discharge port 15 is communicated with another slag, The particles and the sediment may be separated and discharged.
If it does in this way, the discharged sediment and coarse particles can be processed by another system. For example, coarse particles may be crushed with a crusher such as a mill to obtain a particle size suitable for flotation, and then supplied again to the flotation beneficiator.

DESCRIPTION OF SYMBOLS 1 Flotation machine 10 Flotation tank 11 Slurry supply port 12 Side wall 13 Slurry interface adjustment gate 14 Partition 15 Coarse particle discharge port 16 Gate valve 20 Stirrer 21 Shaft part 22 Disc 23 Blade 24 Baffle plate 31 Flotation iron 32 Sedimentation iron

Claims (3)

A flotation tank to which a slurry containing minerals is supplied;
Air supply means for supplying air to the slurry;
Stirring means for stirring the slurry;
And a coarse particle outlet provided near the bottom of the flotation tank for discharging coarse particles of the mineral. The float beneficiation machine according to claim 1, wherein a valve capable of adjusting a discharge amount is provided at the coarse particle discharge port. The flotation machine according to claim 1 or 2, wherein the coarse particle discharge port is provided at a position far from a supply position of the slurry in the flotation tank.

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