JPH06198213A - Wet classifying method and apparatus - Google Patents

Abstract

PURPOSE:To classify and recover suspended matter in a low operation cost by inexpensive recovery equipment by rotating a drum in a direction feeding dross to the deep part of the drum by a spiral blade and discharging slag peeled and dissolved from dross along with a dissolving soln. and subsequently reversely rotating the drum to take out a precipitate. CONSTITUTION:In a wet classifying method, a spiral blade 15 and a mixing blade 16 partially made spiral in the direction reverse to the spiral blade 15 are provided in a drum 2 and molten dross and a dissolving soln. are supplied into the drum 2 from the opening 2D provided to the end of the drum 2. At first, the drum 2 is rotated in the direction feeding dross to the deep part of the drum 2 by the spiral blade 15 to stir the content in the drum 2 and slag peeled and dissolved from the dross is discharged from the opening 2D provided to the end of the drum along with the dissolving soln. Subsequently, the drum 2 is reversed and a precipitate is fed by the spiral blade 15 to be taken out of the opening 2D.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION The present invention relates to a method in which dross produced in a melting furnace is immersed in water, slag is separated by crushing or melting, and the separated slag suspended in water is classified and taken out if necessary. At the same time, the present invention relates to a wet classification method and device for removing the remaining heavy weight, and more specifically, in a treatment facility for waste dry batteries, the waste dry batteries are melted in a melting furnace, and the slag that adheres to the surface of the dross that is lumped. Alternatively, the present invention relates to a classification method and apparatus suitable for dissolving and peeling the slag contained therein and taking out the classification by a wet method, and at the same time, collecting heavy substances (zinc particles) mixed in dross as a precipitate.

[0002]

2. Description of the Related Art In a conventionally known waste treatment facility, wastes including waste dry batteries are melted in a melting furnace and the dross is disposed as industrial waste. Such a waste treatment method causes waste of resources and destruction of the environment, and is not preferable from the viewpoint of resource saving and environmental protection. For this reason, in recent years, it has been desired to reduce the amount of waste to be landfilled by collecting and reusing the resources contained in the waste. However, an effective system for recovering zinc contained in waste batteries has not yet been realized.

[0003]

As a conventional treatment method for waste dry batteries, dross is immersed in a solution in a stirring tank and mechanically stirred to remove or dissolve slag. There is one that separates and discharges the slag that has been peeled off and dissolved, and at the same time collects zinc particles that have settled at the bottom of the stirring tank. However, according to this method, it is difficult to recover the zinc particles settled at the bottom of the stirring tank, and the recovery cost becomes high, so that it cannot be an economical system as a resource recovery system.

Further, when a commonly used ore or gravel classifying method such as trommel or a classifier is applied to a system for recovering zinc from molten dross of a waste dry battery, the dross is introduced inside the trommel or classifier. The residence time is short and the slag is taken out together with the zinc particles without being peeled off. Therefore, the zinc recovery efficiency is poor, and this is not economical as a resource recovery system.

When a resource recovery system is planned, it is convenient in terms of cost of recovery equipment, operating cost of recovery equipment and the like, and convenience in terms of utilization of recovered materials (that is, a form in which recovered resources are easy to use). Is required). Therefore, when recovering zinc from the molten dross of waste batteries,
It is preferable that the recovery facility and operating cost are low, the amount of slag remaining in the recovered zinc is small, and the particle size of the recovered slag can be controlled from the viewpoint of reuse of the recovered slag.

Therefore, an object of the present invention is that the recovery facility is simple and low in cost, and the operating cost is low, at the same time,
(EN) It is possible to provide a wet classification method and an apparatus which can easily take out a residue and can collect and collect a suspended matter.

[0007]

From the above, the feature of the present invention resides in that the spiral blade and the mixing blade partially spiraled in the opposite direction to the spiral blade are provided in the drum, The molten dross and the solution are supplied from the opening at the end, first, the spiral blade rotates the drum in the direction to convey the dross to the inside to stir the inside of the drum, and the slag separated from the dross and melted is opened at the end of the drum. Drain with the lysate, and then
The drum is rotated in the reverse direction, the precipitate is conveyed by the spiral blade, and the precipitate is taken out from the opening at the end of the drum.

Further, a feature of the present invention is that in the above-mentioned wet classification method, the rotation speed of the drum when discharging the slag separated and dissolved from the dross together with the solution from the opening at the end of the drum is stepwise. By increasing the size, the particle size and specific gravity of the discharged slag are managed.

Another feature of the present invention is that it is mounted on a pedestal and has a rotatable drum having an opening at one end, a spiral blade installed in the drum, and a spiral blade installed in the drum. A mixing blade partially spiraled in a direction opposite to the spiral blade; a molten dross supply chute inserted into the opening at the drum end; And a motor for rotating the drum, and a switch for switching the rotation direction of the motor.

Further, a feature of the present invention is that the above-mentioned wet classification device is provided with a rotation speed control means for controlling the rotation of the motor in a stepwise manner.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the structure of an embodiment of the present invention,
2 is a left side view of FIG. 1, and FIG. 3 is a sectional view of the drum of FIG. In FIGS. 1 to 3, a drum 2 is mounted on a pedestal 1 while being inclined. The drum 2 does not necessarily have to be installed at an angle. The drum 2 is provided with a rail belt 3 and a support shaft 4, and the rail belt 3 abuts on a roller 5 provided on the pedestal 1, and the roller 5 rolls to support the drum 2. The bearing shaft 4 is rotatably supported by a bearing 6 provided on the frame 1. The drum 2 is provided with a sprocket 7, and a chain 8 is wound around the sprocket 7. The chain 8 is a sprocket 10 for a motor 9 installed on the frame 1.
The drum 2 is rotated by the motor 9. The gantry 1 is installed on a loading platform such as a vehicle, and the device of the present invention can be a mobile type.

The drum 2 comprises a cylindrical portion 2A and a conical portion 2B, and the cylindrical portion 2A and the conical portion 2B are connected by a flange portion 2C. The drum 2 may have a cylindrical shape over the entire length or a conical shape over the entire length. An opening 2D is provided at the end of the drum 2, and a chute 11 to which raw materials such as dross are supplied and a chute 12 to which a solution such as water is supplied are inserted and installed in the opening 2D.

A discharge chute 13 is provided facing the opening 2D side of the drum 2. The discharge chute 13 is the drum 2
It receives the solution, slag, precipitates, etc. discharged from the base station and is fixed to the end of the gantry 1. Also, drum 2
The drain receiver 14 is provided below the flange portion 2C. The drain receiver 14 is the flange portion 2 of the drum 2.
It receives the solution that leaks from C and the solution that leaks from the opening 2D and is fixed to the pedestal 1.

Referring to FIGS. 4 and 5 in addition to FIG. 3, at least two types of blades, that is, a spiral blade 15 and a mixing blade 16, are provided on the inner surface of the drum 2. The spiral blade 15 conveys the precipitate to one side in the drum 2 as the drum 2 rotates. In this embodiment, the spiral blade 15 is used.
Is installed, and the spiral blade 15 is provided with a large number of openings 15A. Here, the number of spiral blades used in the present invention is not limited to one. The shape of the through hole 15A is not limited to the circular shape as long as the dissolving liquid and the floating slag can pass through and escape. The mixing blade 16 is installed in such a manner that it is partially spiral opposite to the spiral blade 15 or inclined in the drum longitudinal direction. In this embodiment, the mixing blade 16 has three types of mixing blades 16A and 1A as shown in the development views of FIGS.
It consists of 6B and 16C. Mixing blade 16
A shows a curved structure in the development view (it has a spiral shape in the actual installation state), and the mixing blade 16B is arranged in a straight line in the development view (it has a curved structure in the actual installation state). The blade 16C is installed across the spiral blade 15. In the present invention, three types of mixing blades are not necessarily required, and one or more types are sufficient. As shown in detail in FIGS. 6 and 7, a passage port 17 is formed between the spiral blade 15 and the mixing blade 16C so that the sediment conveyed along the spiral blade 15 is not stopped. Has become. A bending portion 16C 'is formed at the tip of the mixing blade 16C, and the precipitate lifted by the bending portion 16C' falls from above the drum 2 and at the same time, the spiral blade 15 is forcibly conveyed. Has become. The bent portion 16C 'formed on the mixing blade 16C may be installed on the other mixing blades 16A and 16B. Curved mixing blade 16
In B, since the precipitate can be held in the curved portion, even in the curved mixing blade 16B, the same lifting of the precipitate as in the mixing blade 16C,
It is supposed to fall.

Returning to FIG. 1, the gantry 1 is provided with a control panel 18 for controlling the rotation of the motor 9, and the control panel 18 has a changeover switch 19 for switching the rotation direction of the motor 9 and rotation of the motor 9. A rotation speed control knob 20 for controlling the number is provided. The installation place of the control panel 18 is not limited to the gantry 1.

The operation of the wet classification apparatus of the present invention constructed as above will be described below. The dross obtained by melting the waste dry battery is supplied from the chute 11 into the drum 2, and the dissolved liquid is supplied from the chute 12 into the drum 2. When the motor 9 rotates, the sprocket 10, chain 8, and sprocket 7 rotate the drum 2. In this case, the changeover switch 19 determines the rotation direction of the drum 2 as follows. That is, the rotation direction is selected such that the supplied dross is conveyed to the inner side of the drum 2, that is, from the opening 2D to the inner side by the spiral blade 15. In this state, the spiral blade 1
While the dross is conveyed to the inner side of the drum 2 by 5,
Since the mixing blade 16 conveys the toner to the side of the opening 2D of the drum 2 as well, agitation occurs in the drum 2. For this stirring, the mixing blade 16B,
Since the precipitation and the fall of the precipitate by 16C are included, the precipitation is destroyed. By this stirring and breaking, the slag component in the dross is peeled and dissolved in the solution, and floats in the solution. Even when the mixing blade 16C is installed at the crotch of the spiral blade 15 during conveyance by the spiral blade 15, since the precipitate passes through the passage opening 17 formed in the mixing blade, the mixture is conveyed along the spiral blade 15. There is no hindrance to the transportation of the deposited precipitate.

The solution in the drum 2 overflows from the opening 2D and is discharged from the chute 13. in this case,
Slag floating in the solution is also discharged together. Drum 2
When the number of rotations of the drum 2 is large, vigorous stirring occurs, so that slag having a large specific gravity or slag having a large particle size also floats in the solution, and when the number of rotations of the drum 2 is small, gentle stirring is performed. Only slag with a small particle size or a small particle size will float in the solution. Therefore, by selectively operating the rotation speed control knob 20 so that the rotation speed of the drum 2 is increased stepwise,
The particle size or specific gravity of the discharged slag can be controlled.

When the peeling and melting of the slag contained in the dross is completed, the changeover switch 19 is changed over to change the drum 2
Rotate in the opposite direction. Then, the zinc particles precipitated in the drum 2 are conveyed in the direction of the opening 2D by the spiral blade 15 and discharged from the opening 2D.

In the above embodiments, the method and apparatus for treating the molten dross of the waste dry battery are explained, but the present invention is not limited to the embodiments.
It can be implemented as another method and apparatus for treating molten dross.

[0020]

The effects of the present invention configured as described above are as follows. The collection facility is simple,
Moreover, since the operation is simple, the facility cost is low, and at the same time, the operating cost is low. Since the residue can be taken out by rotating the drum, the residue can be taken out easily and the cost can be reduced. In addition, the suspended matter can be collected only by rotating the drum in the opposite direction, and the suspended matter can be classified and collected only by changing the number of rotations. Therefore, the classification and collection ratio is low.

[Brief description of drawings]

FIG. 1 is a front view showing an entire wet classification apparatus according to an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a cross-sectional view of the drum of FIG.

FIG. 4 is a development view of a cylindrical portion of a drum.

FIG. 5 is a development view of a conical portion of a drum.

FIG. 6 is a cross-sectional view of a mixing blade installed with a spiral blade in a crotch position.

7 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 cradle 2 drum 3 rail belt 4 bearing shaft 5 roller 6 bearing 7 sub rocket 8 chain 9 motor 10 sprocket 11 chute 12 chute 13 chute 14 drain catch 15 spiral blade 15A through hole 16 mixing blade 17 through hole 18 control panel 20 changeover switch 19 Rotation speed control knob

Claims (7)

[Claims] 1. A spiral blade and a mixing blade partially spiraled in a direction opposite to the spiral blade are provided in a drum, and a molten dross and a solution are supplied from an opening at a drum end. Rotate the drum in the direction that conveys the dross to the inside to stir the inside of the drum, discharge the slag that has separated from the dross and dissolved from the opening at the end of the drum together with the solution, and then rotate the drum in the reverse direction to make a spiral. A wet classification method characterized in that the precipitate is conveyed by a blade and the precipitate is taken out from an opening at the end of the drum. 2. The particle size and specific gravity of the discharged slag are controlled by gradually increasing the number of rotations of the drum when discharging the slag separated and dissolved from the dross together with the dissolving liquid from the opening at the end of the drum. The wet classification method according to claim 1, wherein 3. A rotatable drum mounted on a pedestal and having an opening at one end, a spiral blade installed in the drum, and a spiral blade installed in the drum and partially in a direction opposite to the spiral blade. A spiral mixing blade, a molten dross supply chute provided by being inserted into the opening of the drum end, a dissolution liquid supply chute provided by being inserted into the opening of the drum end, and the drum. A wet classification device comprising a rotating motor and a switch for switching the rotation direction of the motor. 4. The wet classification apparatus according to claim 3, further comprising rotation speed control means for controlling the rotation of the motor in a stepwise manner. 5. The wet classification device according to claim 3, wherein the spiral blade is formed with a through hole. 6. The wet classification device according to claim 3, wherein a bending portion for lifting and dropping the precipitate is formed at the tip of the mixing blade. 7. The wet method according to claim 3, wherein the mixing blade is installed with a spiral blade in a crotch manner, and a passage for precipitation is provided between the mixing blade and the spiral blade. Classification device. [0001]