JPH0243035Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention mainly uses waste containing aluminum alloys,
For example, it relates to a melting furnace that continuously melts aluminum alloy parts of scrapped automobile engines and separates and recovers the aluminum alloy parts.

(Prior Art) In recent years, there has been a tendency for aluminum alloy materials to be used as engines for automobiles, etc., but in the past, as a method for separating and recovering aluminum alloys from the engines of automobiles, etc. that have been disposed of, these discarded engines have been used in gas burners, etc. The method used was to heat the aluminum alloy with water, melt and separate only the aluminum alloy, and recover it.

(Problem that the invention aims to solve) However, in the conventional method, the engine is heated while it is stationary, so it is difficult to uniformly heat the entire engine, and therefore the parts where the aluminum alloy is not melted. In addition, there is a problem that the recovery rate of aluminum alloy is poor, such as molten aluminum alloy parts collecting in the recesses of unmelted iron parts or being sucked between parts with complex shapes. Ta.

In addition, with conventional methods, each time the first treatment is completed, it is necessary to perform cumbersome operations such as stopping heating, removing the treated engine, installing the untreated engine, and starting heating. In addition, since it is a heavy object, there is a problem in that these operations require a great deal of time and effort.

(Means for solving the problem) The present invention was made with the purpose of solving the above-mentioned problems, and in order to achieve this purpose, the present invention uses a hollow interior as a dissolution chamber. The rotary drum includes a door that opens and closes on the input side of waste, and an opening and closing door on the discharge side of undissolved waste, and the rotary drum has a bottom surface of the dissolution chamber that slopes downward from the waste input side to the discharge side. A plurality of stirring plates are provided protruding from the circumferential surface of the melting chamber, and the waste input side opening/closing door is in a state where the waste input port formed at the input side opening of the rotating drum can be opened and closed. The non-dissolved waste discharge side opening/closing door is provided so as to be movable up and down with a small gap for molten metal outflow maintained between the discharge side opening and end face of the rotating drum, and The non-dissolved waste discharge port opened in the lower half of the discharge side opening of the rotating drum is opened and closed by raising and lowering the opening/closing door. An exhaust gas discharge passage communicating with the melting chamber of the rotating drum was provided, and a flame supply passage communicating with the melting chamber of the rotating drum was provided at the bottom.

(Function) Therefore, in the rotary kiln of the present invention, the melting chamber is formed in the shape of a rotating drum as described above, and the inner bottom surface is formed in a downward slope shape from the waste input side to the discharge side. Since a plurality of stirring plates are protruded from the inner circumferential surface, waste such as engine waste that is periodically input from the waste input side is transferred to the discharge side while rolling. Therefore, the entire waste is heated uniformly, and metals to be recovered such as aluminum alloy are efficiently melted, and molten metal is efficiently separated from non-melted metal by rolling the waste. Therefore, the recovery rate of the target metal is greatly improved.

In addition, the molten metal such as aluminum alloy that has been melted and separated flows to the waste discharge side along the sloping inner bottom surface of the rotating drum, and is formed between the discharge side opening/closing door and the end surface of the discharge side opening of the rotating drum. The molten metal is collected by falling to the outside through a small gap, while non-dissolved waste such as iron is periodically discharged to the outside through a waste outlet that is opened by raising the discharge door. Since the metals are discharged, separation and collection of molten metals and non-dissolved wastes can be carried out efficiently.

In addition, the exhaust side door has an exhaust gas exhaust path at the top and a flame supply path at the bottom, so when the exhaust side door is raised, the flame supply path at the bottom is connected to the exhaust gas exhaust path. Therefore, there is no need to interrupt the work such as stopping the flame supply every time the non-dissolved waste is discharged regularly, and continuous operation is possible.

Furthermore, since the above steps are carried out continuously within the rotating drum, efficient recovery work can be carried out with less wasteful radiation of thermal energy.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of the embodiment will be explained.

As shown in FIGS. 1 to 3, the rotary kiln A of this embodiment includes a rotating drum 1, a waste input side opening/closing door 2, an undissolved waste discharge side opening/closing door 3, a chimney 4, and a vibrator device. 5 as the main configuration.

The rotating drum 1 has an inner wall layer 1b made of heat-resistant concrete formed on the inner peripheral surface of a cylindrical steel plate 1a,
The hollow interior serves as a dissolution chamber 6.

This dissolving chamber 6 is formed so that its inner diameter gradually increases from the waste input side to the waste discharge side, so that the inner bottom surface of the dissolving chamber 6 is formed in an inclined shape. Further, a plurality of stirring plates 1c are protruded from the inner peripheral surface of the dissolution chamber 6, and in the embodiment, the stirring plates 1c
is provided with the waste discharge side inclined with respect to the axial direction of the rotary drum 1 in a direction opposite to the rotation direction.

Further, a guide ring 7 is provided on the outer periphery of the rotating drum 1.
are formed at two locations, and this guide ring 7 is rotatably supported by a pair of left and right receiving rollers 9 provided on a base 8, and the rotating drum 1
The rotating drum 1 is rotated by meshing a large gear 10 formed on the outer periphery of the drum with a small sprocket 12 that is interlocked with a drive device 11.

Incidentally, the waste input side opening 1 of the rotating drum 1
d is closed by a front wall 13 erected on the base 8, and a waste inlet 14 communicating with the dissolution chamber 6 is opened in the front wall 13.

The waste input side opening/closing door 2 is a door that opens and closes the waste input port 14, and in the embodiment, it is provided so as to be movable up and down along the front surface of the waste input port 14, and is connected to the wire 15. Raising and lowering is performed by means of hoisting means such as a winch.

The undissolved waste discharge side opening/closing door 3 is a door that opens and closes the discharge side opening 1e of the rotating drum 1, and maintains a booth gap a for molten metal outflow between the discharge side opening 1e and the discharge side opening end face. It is provided in a state that it can be raised and lowered freely in a state in which it is raised and lowered, and is raised and lowered by winding means such as a winch via a wire 15, and by raising the discharge side opening/closing door 3, the discharge side opening of the rotary drum 1 is opened. A substantially semicircular discharge port 16 for undissolved waste is opened in the lower half of the portion 1e.

Further, the discharge side opening/closing door 3 is formed to have a thickness of about 300 mm, and an exhaust gas discharge passage 17 communicating with the melting chamber 6 of the rotating drum 1 is provided in the upper part thereof, and a dissolving chamber 6 of the rotating drum 1 is provided in the lower part thereof. A flame supply route 18 has been opened that communicates with the

The chimney 4 is for forcibly suctioning and discharging exhaust gas, and is provided so that its lower end opening side faces the exhaust gas discharge path 17.

The vibrator device 5 is used to prevent the undissolved waste discharged from the discharge port 16 of the dissolution chamber 6 from becoming a large lump by adhering to each other by the cooling solidification effect of the remaining molten metal until solidification. A guide chute 19 is provided between the discharge port 16 and the discharge port 16.

This guide chute 19 is provided toward the direction in which non-dissolved waste is discharged.

The vibrator device 5 has a chute-like main body 2
0 is suspended in the air by a coil spring 21 and is vibrated by a vibration generator (not shown) such as an eccentric motor, and a receiving container 22 is provided at the bottom thereof.

Note that a guide chute 23 is provided directly below the small gap a for flowing out the molten metal. This guide chute 23 is provided facing in a direction opposite to the guide chute 19 leading to the vibrator device 5 (toward the back surface of the rotary drum 1), and is provided with an ingot case 24 at its lower part.

Further, a burner 25 constituting the flame supply means B is provided at the outer opening of the flame supply path 18.

Since this embodiment is configured as described above, in order to process waste using the rotary kiln A of this embodiment, first, the input side opening/closing door 2 is raised and the waste input port 14 is opened. After fully opening the waste input port 14 and inputting waste such as the engine into the dissolution chamber 6, the input side opening/closing door 2 is lowered to close the waste input port 14.

Inside the melting chamber 6, the room temperature is heated to about 800°C by the flame that is injected and supplied through the flame supply path 18 from the burner 25 that constitutes the flame supply means B.
This high heat melts and separates the aluminum alloys in the waste and drips onto the sloping bottom of the melting chamber 6, and flows along the slope to the waste discharge side, outside through the small gap a for molten metal outflow. The ingots flow down and are guided by the guide chute 23 and stored in the ingot case 24.

Note that the waste introduced into the dissolution chamber 6 is heated while being transferred within the dissolution chamber 6 due to the rotation of the rotating drum (approximately 1 rotation per minute) and the presence of a plurality of stirring plates 1c. Therefore, the entire waste is heated uniformly, and molten metal such as aluminum alloy is efficiently separated from non-molten metal such as iron by rolling.

Further, undissolved metal is automatically transferred to the waste discharge side along the sloping inner bottom surface of the melting chamber 6.

Moreover, the exhaust gas in the melting chamber 6 is sucked in the direction of the chimney 4 through an exhaust gas exhaust path 17 provided at the upper part of the exhaust side opening/closing door 3, and is discharged to the outside.

Furthermore, due to the suction action of the chimney 4, the inside of the exhaust gas discharge passage 17 and the entrance portion of the chimney 4 become under a negative pressure state, so even if there is a gap such as the small gap a for molten metal to flow out, the exhaust gas will not flow out to the outside. There's nothing to do.

Next, when the non-dissolved waste has accumulated on the waste discharge side, the discharge side opening/closing door 3 is raised to open the non-dissolved waste discharge port 16 in a substantially semicircular shape, as shown in FIG. , as shown by the two-dot chain arrow in FIG.
While being discharged to the outside, it is guided by the guide chute 19 and falls into the vibrator device 5.

In this vibrator device 5, each undissolved waste is kept separated for a certain period of time until the remaining molten metal is cooled and solidified by applying vibration force to the undissolved waste. The undissolved wastes are collected in the receiving container 22 in a state where they are not joined together to form a lump, but are separated into parts.

In addition, in the above state in which the discharge side opening/closing door 3 is raised, the flame supply passage 18 is connected to the exhaust gas discharge passage 17.
Since the exhaust gas in the melting chamber 6 is sucked in the direction of the chimney 4 through the flame supply path 18 and discharged to the outside, there is no need to stop the burner 25, etc., and continuous operation is possible.

When the discharge of non-dissolved waste is finished, the discharge side opening/closing door 3 is lowered to close the discharge port 16, and if necessary, the waste input port 14 is opened to introduce new waste into the dissolution chamber 6. and continue operation.

As explained above, in the rotary kiln A of the example, the recovery rate of the target metal is extremely high, the separation and recovery work of molten metal and non-dissolved metal can be performed efficiently, and continuous operation is possible. becomes.

Further, in the embodiment, since the vibrator device 5 is provided at the discharge port 16, the non-dissolved waste can be collected in a separated state for each part, so that subsequent processing can be easily performed.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, in the embodiment, the inner bottom surface of the dissolution chamber 6 is formed into a slope shape by forming the inner diameter gradually increasing from the waste input side toward the discharge side, but the present invention is not limited to this. zu, rotating drum 1
The inner bottom surface of the melting chamber 6 may be formed in an inclined shape by providing the inner bottom surface of the melting chamber 6 in an inclined shape.

Further, although the embodiment shows a case where the burner 25 is used as the flame supply means B, the present invention is not limited to this.
For example, gas generated by thermal decomposition of waste such as waste tires, cars, and plastics is directly transferred to the flame supply path 1.
8 and supply it for combustion, the waste treatment heat can be used effectively and fuel costs can be reduced.

Furthermore, in the embodiment, an aluminum alloy engine is shown as the waste to be treated, but the waste is not limited to this, and may be aluminum cans, home appliances, or the like.

(Effect of the invention) Therefore, in the rotary kiln of the invention, the melting chamber is formed in the shape of a rotating drum as described above, and the inner bottom surface is formed in the shape of a downward slope from the waste input side to the discharge side. In addition, since a plurality of stirring plates are protruded from the inner peripheral surface, waste such as engine waste periodically introduced from the waste input side is transferred to the discharge side while rolling. As a result, the entire waste is heated uniformly, and the metals to be recovered such as aluminum alloy are efficiently melted, and the molten metal is efficiently separated from the non-melted metal by rolling the waste. As a result, the recovery rate of the target metal is greatly improved.

In addition, the molten metal such as aluminum alloy that has been melted and separated flows to the waste discharge side along the sloping inner bottom surface of the rotating drum, and is formed between the discharge side opening/closing door and the end surface of the discharge side opening of the rotating drum. The molten metal is collected by falling to the outside through a small gap, while non-dissolved waste such as iron is periodically discharged to the outside through a waste outlet that is opened by raising the discharge door. Since the metals are discharged, separation and collection of molten metals and non-dissolved wastes can be carried out efficiently.

In addition, the exhaust side door has an exhaust gas exhaust path at the top and a flame supply path at the bottom, so when the exhaust side door is raised, the flame supply path at the bottom is connected to the exhaust gas exhaust path. Therefore, there is no need to interrupt the work such as stopping the flame supply every time the non-dissolved waste is discharged regularly, and continuous operation is possible.

Furthermore, since the above steps are carried out continuously within the rotating drum, effects such as less wasteful radiation of thermal energy and more efficient recovery work can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing a rotary kiln according to an embodiment of the present invention, FIG. 2 is an explanatory cross-sectional view showing the process of discharging non-dissolved waste, and FIG. 3 is a cross-sectional view taken along the line of FIG. 1. 1...Rotating drum, 2...Waste input side door, 3...Non-dissolved waste discharge side door, 6
...dissolving chamber, 10... stirring plate, 14... waste inlet, 16... undissolved waste outlet, 17...
Exhaust gas discharge path, 18...Flame supply path, a...Small gap for molten metal outflow.

Claims (1)

[Scope of utility model registration request] The rotary drum has a hollow interior serving as a dissolution chamber, a waste input side opening/closing door, and an undissolved waste discharge side opening/closing door. The dissolution chamber is formed in a downward slope shape toward the side, and a plurality of stirring plates are protruded from the circumferential surface of the dissolution chamber, and the waste input side opening/closing door is a waste input side opening/closing door formed at the input side opening of the rotating drum. The material input port is closed so that it can be opened and closed, and the undissolved waste discharge side opening/closing door is movable up and down with a small gap for molten metal flowing out between it and the end surface of the discharge side opening of the rotating drum. The discharge port for non-dissolved waste opened in the lower half of the discharge side opening of the rotating drum is closed in an openable/closable state by raising and lowering the discharge side opening/closing door. A rotary kiln characterized in that an exhaust gas discharge passage communicating with a melting chamber of a rotating drum is provided in the upper part of the opening/closing door, and a flame supply passage communicating with the melting chamber of the rotating drum is provided in the lower part.