JPH0987758A - Device for recovering metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal recovering device having a high working efficiency by mechanizing the work and almost perfectly recovering metal content from metallic scrap. SOLUTION: In the metal recovering device, in which a cylindrical furnace body 1 is supported by a base frame 14 at both end parts alternately and vertically movably and constituted with a water cooling body 2 at the upper half furnace body and with a crucible 3 of heat-insulating structure at the lower half furnace body, and metal scrap stirring blades 20 and a residual ash (produced slag) stirring blade 21 are fixed to a rotary shaft 18 arranged in the furnace body, the rotary shaft is supported shiftably in a prescribed range in the axial direction. At the lower end of the rotary shaft, a plug 22 for opening/closing a molten metal discharging hole bored at the center of the crucible bottom having a spherical shape, is arranged and the residual ash stirring blade 21 is formed as a spiral blade. Further, the bottom body of the crucible is connected in a hinge type through a connecting member so as to be freely openable/closable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal recovery device for recovering (re-collecting) metal from metal scrap such as aluminum.

[0002]

As one of the metal recovery devices for recovering metal from metal scrap such as aluminum, the applicant has a molten metal outlet at the lower end and an upper end at the upper end. The middle part of a cylindrical furnace body with a residual ash outlet is supported by a support frame on an underframe so that both ends can be moved up and down alternately, and the upper half furnace body with a residual ash outlet near the spindle Consists of a water-cooled body in which a lid is attached to the open part of the gutter-shaped body with a water jacket gap inside, and the lower half furnace body with the molten metal outlet from the vicinity of the spindle is a heat-insulating crucible. There is proposed a structure in which a rotary shaft is arranged in the furnace body, and a metal scrap stirring blade and a residual ash stirring blade are fixedly mounted on the rotating shaft at a predetermined interval.

In order to recover the metal content from the metal scrap using this apparatus, high temperature metal scrap (metal slag) is put into the furnace body with the crucible side facing down and the furnace body being inclined. While melting with a metal scrap stirring blade, the metal content is melted, the molten metal is taken out from the molten metal outlet at the lowest position of the crucible, and then the furnace body is tilted in the opposite direction to remove ash. In this ash extraction work, the furnace body is inclined in such a manner that the residual ash extraction port is once lowered in the horizontal position while the water-cooled body side having the residual ash extraction port is descending. Here, the residual ash remaining in the crucible and under high temperature is moved toward the residual ash extraction port into the water-cooled body while being stirred by the residual ash stirring blade, and during this movement, the water in the water-cooled body is Cooling is performed by cooling water that flows in the gap, and the cooled powdery residual ash is taken out from the residual ash extraction port and an appropriate treatment is performed.

By the way, in the crucible constituting the furnace body of the metal recovery apparatus having the above-mentioned structure, the molten metal take-out port is provided at the lowest portion of the crucible in a state where the furnace body is inclined to the working position, Since this molten metal outlet is configured to be opened and closed from the outside of the crucible, the metal recovery work often relies on manpower, including opening and closing the molten metal outlet, and the workers are exposed to high temperatures and soot and dust. Not only forcing the work while standing up, but because the molten metal extraction port is positioned at the lowest part of the furnace body, it is difficult to open and close it.

When the metal scrap stirring blade is stopped or the heating is interrupted due to some trouble after the metal recovery work is started and the melting and separation of the metal component is started in the furnace body, the molten metal causes the metal scrap stirring blade to move. It may solidify in the form of being held and make it impossible to operate the device, and if this is removed in the crucible, it often becomes difficult and long-time work in a narrow space.

The present invention has been made in view of the above points, and an object of the present invention is to provide a metal recovery apparatus that mechanizes most of the metal recovery work, is convenient to handle, and has improved work efficiency.

[0007]

In order to solve the above-mentioned problems, a metal recovery apparatus according to claim 1 of the present invention has a molten metal take-out port at its lower end and residual ash at its upper end. The middle part of the cylindrical furnace body having the take-out port is supported by the underframe with the support shaft so that both ends can be moved up and down alternately, and the upper half part furnace body with the residual ash take-out port is provided near the support shaft. It is composed of a water-cooled body in which a lid is attached to the open part of a gutter-shaped body with a water jacket gap, and the lower half furnace body with a molten metal extraction port near the spindle is composed of a heat-insulating crucible. In a metal recovery device in which a rotating shaft is installed in the furnace body and a metal scrap stirring blade and a residual ash stirring blade are fixedly mounted on the rotating shaft, the rotating shaft is movably supported in a predetermined range in the axial direction. , The upper end of the rotary shaft is connected to the rotary drive source and the reciprocating drive source, and the lower end of the rotary shaft is a spherical surface of the crucible. Emboli for opening and closing the molten metal outlet which is formed in the bottom center provided, characterized in that the residual ash stirring blade corresponding to the water cooling the body portion is formed in the spiral wrap.

According to the metal recovery apparatus thus constructed, the molten metal is taken out from the furnace body by pulling up the rotary shaft in the furnace body and removing the block from the molten metal take-out port. With the mouth open, the tilt angle of the furnace body can be changed to change the outflow amount of the molten metal, or the outflow can be temporarily stopped.

To remove the residual ash remaining in the crucible, tilt the furnace body so that the residual ash outlet is at the bottom, and rotate the residual ash stirring blade consisting of a spiral blade to stir the residual ash. At the same time, it is forcibly moved toward the residual ash extraction port, so it can be extracted efficiently and reliably. Further, since the residual ash taken out is in the form of powder and is cooled, it is easy to process.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION As one embodiment of the present invention, a middle portion of a cylindrical furnace body having a molten metal outlet at a lower end and a residual ash outlet at an upper end is supported by a spindle. The upper half of the furnace body is supported by a frame so that both ends can be moved up and down alternately, and the upper half furnace body with the residual ash extraction port from the vicinity of the support shaft, and the lid body on the open part of the gutter-shaped body with the water canal gap inside the body. It consists of the attached water-cooled body, the lower half furnace body with the molten metal outlet from the vicinity of the spindle is composed of a crucible with a heat insulating structure, and the rotating shaft is installed in the furnace body,
In a metal recovery device in which a metal scrap stirring blade and a residual ash stirring blade are fixed to the rotating shaft, the crucible is divided into a crucible body and a crucible bottom body having a spherical bottom, and the crucible bottom body is hinged to the crucible body. When the metal scrap agitating blade is started after the metal recollection work is started and the metal scrap agitating blade becomes unrotatable, the bottom body is opened with respect to the main body of the crucible so that the metal scrap agitating blade can be opened and closed. It is possible to expose and remove metal scraps and the like that are entangled with it from the outside, and troubles can be eliminated early.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing the furnace body of the present invention in a cross section, FIG. 2 is a cross sectional view of the furnace body shown in a cross section orthogonal to the axial direction, and FIG. 3 is a state in which the crucible bottom body of the crucible is opened. FIG. 4 is a front view of the crucible, FIG. 5 is a partial plan view of the crucible, and FIG. 6 is a front view of the crucible.

In the figure, reference numeral 1 denotes a tubular furnace body, which is a water-cooled body 2 in which a tubular crucible 3 is continuously provided, and the water-cooled body 2 has a water cap gap 4 in its body. A lid 5 is attached to the upper open portion of the provided trough, and the water jacket gap 4 is connected to an external cooling water supply mechanism through a flexible tube (not shown) to flow the cooling water. The water cooling body 2 is provided with a residual ash extraction port 6 below the upper end of the water cooling body 2, and the lid body 5 forming the water cooling body 2 is divided into a plurality of parts. It is easy to open and close.

The crucible 3 has a heat-resistant structure and has a spherical bottom 7. The bottom body 9 is divided into a body 8 continuous with the water-cooled body 2, and a metal is provided on the upper side of the body 8. A scrap inlet 10 is provided, a molten metal outlet 11 is provided in the center of the spherical bottom 7, and a bottom body 9 is hingedly openable and closable with respect to the main body 8 at a position axially symmetrical.
Hinge pin 13 of one connecting member 12
The bottom body 9 is opened laterally with respect to the main body 8 with the other hinge pin 13 as the center of rotation.

Reference numeral 14 denotes an underframe for supporting the furnace body 1, which is supported by supporting shafts 15 horizontally protruding from both sides of the middle portion of the furnace body 1. One supporting shaft 15 is provided with a rotation interlocking mechanism 16 therebetween. The furnace body 1 is connected to a drive motor 17, and both ends of the furnace body 1 are alternately movable up and down with the support shaft 15 as a fulcrum.

Reference numeral 18 denotes a rotary shaft provided in the central portion of the furnace body 1, and the rotary shaft 18 is movable in a predetermined range in the axial direction of the furnace body 1 at a plurality of bearing members 19. It is supported and corresponds to the crucible part 3 and the metal scrap stirring blade 2
0 is fixed, a residual ash stirring blade 21 composed of spiral blades is fixed corresponding to the water cooling body 2, and an embolus 22 for opening and closing the molten metal extraction port 11 is provided at the lower end of the rotary shaft 18. The upper end of the rotary shaft 18 is connected to a reciprocating drive source 23 including a cylinder device that reciprocates through the end wall of the water-cooled body 2. Further, a rotary interlocking mechanism 24 is provided at the upper end of the rotary shaft 18. Rotary drive source 25 consisting of a motor
Connected to. In addition, in the rotation interlocking mechanism 24 portion that transmits the rotation of the rotary drive source 25 to the rotary shaft 18,
In the portion where is inserted, a spline connection is provided that transmits rotation to the rotary shaft 18 and allows movement of the rotary shaft 18 in the axial direction. Further, in order to allow the movement of the rotary shaft 18 in the axial direction, the residual ash stirring blade 21 is configured to be discontinued at the bearing member 19 that supports the rotary shaft 18 at the intermediate portion thereof. Although not shown, the water-cooled body 2 that constitutes the furnace body 1
For this, a heating burner for heating the metal scrap, a chimney, a blower, and the like are installed in appropriate places.

A description will be given of a work procedure of melting and recovering a metal component from a metal scrap such as aluminum in the above structure.

The furnace body 1 is set to about 20 to 30 with the crucible 3 part facing down.
The metal scrap is charged into the furnace body 1 by inclining it at an angle of about 0 ° C., and the metal content is melted by heating while stirring with the metal scrap stirring blade 20. Thereafter, when the rotary shaft 18 is pulled up and the plug 22 provided at the lower end of the rotary shaft 18 is pulled out from the molten metal outlet 11, the molten metal (molten metal) accumulated in the crucible 3 flows out from the molten metal outlet 11 and is taken out. .

Here, by changing the inclination angle of the furnace body 1, the outflow amount of the molten metal component can be changed with the molten metal outlet 11 kept open, or the molten metal component can be left in the crucible 3 to leave the molten metal component. It is possible to temporarily stop the outflow of.

Subsequently, the rotary shaft 18 is lowered to drop the embolus 2.
The molten metal take-out port 11 is closed at 2 and the furnace body 1 is returned to the original tilted position, a heating agent is added to the slag remaining in the furnace body 1 and the metal scrap stirring blade 20 is stirred again to generate heat to generate metal components. Is dissolved, and the dissolved metal is taken out in the same manner as above.

After this, the ash removal work is started. As the ash extraction work, the furnace body 1 is tilted in the opposite direction so that the residual ash extraction port 6 on the water cooling body 2 side is located below. Here, the residual ash remaining in the crucible 3 and under high temperature tends to descend toward the residual ash extraction port 6 as the inclination of the furnace body 1 increases, and stirring is performed by the residual ash stirring blade 21. While being moved, it is continuously moved toward the residual ash extraction port 6, and during this movement, the residual ash is cooled by the cooling water flowing in the water gap 4 and is extracted from the residual ash extraction port 6. The residual ash thus taken out is cooled and has a granular form, so that it is taken out and appropriately treated immediately.

[0022]

According to the present invention having the above-described structure, the following effects can be obtained.

(1) The metal content melted from the metal scrap charged into the furnace body is melted by pulling up the rotary shaft and removing the embolus provided at the lower end from the melted metal outlet provided at the center of the spherical bottom of the crucible. Since it is taken out by flowing out from the metal extraction port, it is not necessary for the worker to approach the molten metal extraction port and open and close the molten metal extraction port, so it is possible to complete mechanization. The working environment in which a person is exposed to high temperature soot and smoke can be improved.

(2) When removing the residual ash remaining in the furnace body, the furnace body is tilted in the opposite direction so as to lower the residual ash extraction port, and the residual ash extraction port is agitated by the residual ash stirring blade consisting of spiral blades. Moreover, since the residual ash is removed from the furnace body reliably because it is moved toward the base plate and is cooled during this movement, the processing of the removed residual ash can be simplified and the working time can be shortened.

(3) The crucible is divided into a crucible body and a crucible bottom body having a spherical bottom, and the crucible bottom body is joined to the crucible body via a connecting member which can be opened and closed in a hinge manner, so that the metal recovery work is started. If the metal scrap stirring blade stops due to some trouble after the operation, open the bottom part of the crucible main body to expose the metal scrap stirring blade, and externally remove metal scrap that is entangled with it. It can be eliminated easily and troubles can be eliminated early, improving the operating efficiency of the device.

[Brief description of drawings]

FIG. 1 is a front view showing a cross section of a furnace body of an apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing a furnace body in a cross section orthogonal to the axial direction.

FIG. 3 is a front view showing a cross section of a furnace body in a state where a crucible bottom body of the crucible is opened.

FIG. 4 is a front view showing a mode of use of the device of the present invention.

FIG. 5 is a partial plan view of the crucible.

FIG. 6 is a partial front view of the crucible.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Furnace body 2 ... Water cooling body 3 ... Crucible 11 ... Molten metal outlet 13 ... Connection member 14 ... Underframe 18 ... Rotating shaft 20 ... Metal scrap stirring blade 21 ... Residual ash stirring blade 22 ... Embolic plug

Claims (2)

[Claims] 1. A cylindrical furnace body having a molten metal take-out port at its lower end and a residual ash take-out port at its upper end is supported by a support frame on an underframe so that both ends are alternately moved up and down. The upper half furnace body, which is freely movable and has a residual ash extraction port near the spindle, is composed of a water-cooled body with a lid attached to the opening of a gutter-shaped body with a water jacket gap. A lower half furnace body with a molten metal outlet from the vicinity is composed of a crucible with a heat insulating structure, a rotating shaft is installed in the furnace body, and a metal scrap stirring blade and residual ash stirring blade are fixedly mounted on the rotating shaft. In the recovery device, the rotary shaft is movably supported in a predetermined range in the axial direction, and the upper end of the rotary shaft is connected to a rotary drive source and a reciprocating drive source,
A metal recovery device characterized in that a stopper for opening and closing a molten metal take-out hole formed at the center of the spherical bottom of a crucible is provided at the lower end of a rotating shaft, and a residual ash stirring blade corresponding to the water cooling body is formed in a spiral blade. 2. An intermediate portion of a cylindrical furnace body having a molten metal take-out port at its lower end and a residual ash take-out port at its upper end is supported on an underframe by a support shaft so that both ends are alternately moved up and down. The upper half furnace body, which is freely movable and has a residual ash extraction port near the spindle, is composed of a water-cooled body with a lid attached to the opening of a gutter-shaped body with a water jacket gap. A lower half furnace body with a molten metal outlet from the vicinity is composed of a crucible with a heat insulating structure, a rotating shaft is installed in the furnace body, and a metal scrap stirring blade and residual ash stirring blade are fixedly mounted on the rotating shaft. In the recovery device, the crucible is divided into a crucible body and a crucible bottom body having a spherical bottom, and the crucible bottom body is joined to the crucible body via a connecting member which is hingedly openable and closable. .