JPH0643672Y2 - Tilting rotary melting furnace - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention is a tilting rotary melting furnace used for melting various scraps, ingots, and other materials to be melted such as aluminum dross, aluminum dust, and aluminum engines with iron. Regarding the improvement of.

<Prior art> As a tilt-type rotary melting furnace for this kind of application, it has already been published
No. 36876 has been proposed, in which the crucible-type furnace body (1) is operated by a hydraulic cylinder (7), and
It is configured to change its inclination by 35 degrees.

Further, in order to drive the furnace body (1) to rotate under the inclined posture, the rotary support shaft (2) is integrally projected from the rear surface (bottom portion) of the furnace body (1) in a sealed state, This is rotationally driven by a motor (9) and a transmission belt (10).

<Problems to be Solved by the Invention> In the case of the above-mentioned known device, it is convenient to put the substance to be melted under the top-charge method with the opening (front surface) (3) of the furnace body (1) facing upward. is there.

However, since the rear surface (bottom part) of the furnace body (1) is always in a hermetically sealed state and is shaped so as not to be opened, incomplete combustion of the melting fuel is likely to occur, and gas is accumulated in the molten aluminum. Becomes Further, if an opening / closing door (11) is attached to the opening (3) of the furnace body (1), the rear surface (bottom portion) of the 雛 is formed in a hermetically sealed state, so that the opening portion ( Smoke and flame leak out from 3), and it is still impossible for workers to perform the melting work safely.

Further, since the rear surface (bottom portion) of the furnace body (1) is in a hermetically sealed state, in the tilt angle range (25 to 35 degrees) limited by the above numerical values, the substance to be melted is locally present at the bottom of the furnace body (1). It is easy to concentrate and agglomerate intensively, and as a result, it is not possible to give a uniform stirring action, a spilling action of the molten metal, a wraparound action of flames, etc. to the whole of the melted matter, and the yield is still poor.

Moreover, in the range of tilt angles limited by the above numerical values, it is easy to remove residues such as iron and ash from the furnace body (1).
In addition, it cannot be completely discharged, and since the furnace body (1) needs to be rotated when discharging, a large amount of dust is generated, and the working environment is also poor.

<Means for Solving the Problem> The present invention intends to improve such a problem, and in view of its structure, a crucible-type furnace cylinder is provided with an inlet for the material to be melted and an opening / closing door for the same, While the circumferential barrel surface of the furnace cylinder is supported by a seesaw-type support frame so as to be rotatable around its core wire, and the rotary drive mechanism mounted on the support frame determines that the furnace cylinder can be rotated. , The middle part of the support frame is swingably supported by a horizontal axis in a relation orthogonal to the core line of the furnace cylinder to the installation stand, and the furnace cylinder is rocked by a rocking control mechanism in a predetermined fixed angle range. In a tilting rotary melting furnace that is designed to change the inclination only, a smoke or residue discharge port is formed on the rear surface of the furnace cylinder, and the above-mentioned constant angle range is set by the core wire of the furnace cylinder. Vertically from a posture that tilts to about 45 degrees downward After standing up to a downward attitude of the rear surface of the furnace, at least about 135 degrees as a whole, the residue of iron, ash, etc. was removed from the above outlet of the furnace tube which was changed to the downward attitude of the rear surface. It is characterized in that it is set so that it can be discharged by its own weight.

<Embodiment> The concrete constitution of the present invention will be described in detail below based on the illustrated embodiment. In FIGS. 1 to 6 showing the outline of the tilting rotary melting furnace, (A) is, for example, a diameter. -Approximately 2000 mm, depth length-Approximately 2000 mm, which is a crucible-type furnace tube, on the inside of which ceramics and other refractory materials are attached and integrated. (11) is an inlet for the material to be melted, which is formed in the center of the front surface of the furnace barrel (A). For example, engine scraps or ingots can be input without disassembling before that, It is preferably sized to a diameter of about 1000 mm.

Similarly, (12) is a discharge opening formed in the central part of the rear surface of the furnace barrel (A), from which smoke, iron, ash, and other residues during melting work are discharged. . It is desirable that this discharge port (12) has a diameter of, for example, about 500 mm and is smaller in diameter than the above-mentioned input port (11), so that it can be used for melting work in its open state, There is an advantage that the capacity of the molten metal can be increased.

However, it can be used for melting work by forming a large opening with substantially the same diameter as the charging port (11) and keeping the lid closed by an opening / closing door with a smoke exhaust duct.

(B) is a generic term for the support frame of the furnace barrel (A), and includes a pair of left and right seesaw arms (13) extending parallel to the core wire (OO) of the furnace barrel (A), and both seesaws thereof. A square front frame (14) in front view that connects and integrates the front ends of the arms (13) and a U-shaped rear frame (15) in rear view that also connects and integrates the rear ends of both seesaw arms (13). )
It is framed from the whole. Then, at the substantially center position of the circumferential cylinder surface of the furnace cylinder (A) in the cylinder core direction and the diametrical direction, the middle seesaw arm (13) of the support frame (B) moves its own cylinder core wire (OO). It is supported so that it can rotate around the center.

In this respect, in the figure, a ring-shaped central flange (16) having a large diameter is integrally projected from the circumferential body surface of the furnace barrel (A), and a bolster (17) engaging with the central flange (16) is formed. Of the seesaw arm (13) inwardly projecting from the middle part of the seesaw arm (13), and the pair of left and right pillows (17) rotatably support the furnace tube (A) so that it cannot be displaced in the front-rear direction. At the same time, the circumferential cylinder surface of the furnace tube (A) is supported from below by a pair of left and right idler rollers (18) pivotally supported by the rear frame (15) of the support frame (B).

However, the furnace cylinder (A) is supported by a seesaw type support frame (B) so as to be rotatable around its own cylinder core wire (OO), and will be described later integrally with the support frame (B). A supporting structure other than that shown in the figure may be adopted as long as the swinging action can be performed.

(C) is a rotary drive mechanism of the furnace barrel (A), and a reversible rotary motor (19) with a brake installed and mounted on the seesaw arm (13) of the support frame (B),
The drive sprocket wheel (20) fixed on the output shaft of the motor (19) and the furnace tube (A) corresponding to this.
A large ring-shaped driven sprocket wheel (21) integrated with the rear conical surface of the rear endless endless transmission chain wound between the two sprocket wheels (20, 21). 22) and using the motor (19) as a drive source, the furnace tube (A) is rotated, for example, at a rotation speed of about 1.9 to 2.6 rpm.
It is designed so that it can be rotated by a fixed amount.

However, the rotation drive mechanism (C) is not limited to the one shown in the figure, and for example, the idler roller (18) that comes into contact with the circumferential barrel surface of the furnace tube (A) from below may be used as a drive roller. The rotary cylinder (A) is rotated by operatively connecting a pair of rotary drive shafts to a motor (19) mounted on the support frame (B) via a transmission gear, a transmission belt, or the like. It may be configured as follows.

Further, (23) is an opening / closing door for the insertion opening (11), which is adapted to slide in the left-right direction using the front frame (14) of the support frame (B) as a slide guide rail. In this regard, in the figure, the door (23) is a pair of left and right double doors, and the upper end of each of them is hung on the front frame (14) by the hanger hook (24) or the like, while the pulleys are also pivotally supported at the lower end. (25) is engaged with the front frame (14), and the left and right pairs are automatically opened and closed by a door drive motor (26) installed on the front frame (14). .

However, one door (23) may be slid in a single-opening manner as a whole, or the motor (26) may be omitted and the operator may manually open and close the door. Absent.

(27) is a smoke exhaust duct integrally attached to the opening / closing door (23), which obviously goes into communication with the inside of the furnace tube (A), and smoke coming upward from here passes through the hood (28) to the outside. Will be discharged to. (29) is also a door (2
The burner is installed and fixed in 3), and heavy oil, butane gas, and other melting fuel supplied from the fuel supply pipe (not shown) are melted into the melted material in the furnace barrel (A) under the ignition condition. To project.

Further, (D) is an installation stand on the work floor, and a pair of left and right columns (31) standing upright from the flat plate (30).
The middle part of the seesaw arm (13) of the support frame (B) of the furnace tube (A) is a pair of left and right horizontal horizontal shafts (32) that are orthogonal to the core wire (OO) of the furnace tube (A). ), Is pivotally attached to the overall swing. In that case, the horizontal axis (32) shown in the figure represents the pillow (17) of the furnace tube (A).
However, it is not limited to this.

(E) is a swing control mechanism for the furnace cylinder (A), and in the figure, it is embodied from a pair of left and right hydraulic cylinders (33), and the front side of both the seesaw arms (13) and the flat plate (30). And the piston rod (34) is moved up and down, the furnace cylinder (A) can be tilted and changed by a certain angle range (α). A swing control mechanism (E) other than (33) may be adopted.

For example, a reversible rotation motor (not shown) with a brake is connected and integrated with the horizontal axis (32), and the rotation of the motor causes the furnace tube (A) to be integrated with the support frame (B) in a fixed angle range. It is also possible to change the inclination by (α).

In any case, regarding the swing angle range (α) in which the furnace barrel (A) changes its inclination with the horizontal axis (32) as a fulcrum, in the case of the present invention, especially the furnace barrel (A) as shown in FIG. Tube core wire (OO)
However, from the state of tapping water that is inclined to the front by about 45 degrees, the cylinder core line (OO) also stands upright as shown in Fig. 9, and the rear surface is in the downward posture of discharging residue. The angle is set to at least about 135 degrees, and the posture state of the furnace tube (A) can be freely positioned and controlled within the angular range (α).

Even when the positioning control is performed in the vertical posture as shown in FIG. 9, the rear surface of the furnace tube (A) facing downward can maintain a constant gap (S) with the flat plate (30) of the installation stand (D). In addition, the column (31) of the stand (D) is erected sufficiently tall in relation to the size of the furnace tube (A).

However, when the above-mentioned motor instead of the hydraulic cylinder (33) is adopted as the swing control mechanism (E) to change the inclination of the furnace cylinder (A) around the fulcrum of the horizontal axis (32), 360 including the constant angle range (α) of about 135 degrees
As a degree, so that the front of the furnace tube (A) faces directly below,
In addition, the rotation may be freely controlled in the forward and reverse directions. Cover with this, and this also shows the furnace barrel (A) as shown in Fig. 8.
This is because the hot water discharge posture state and the residue discharge posture state as shown in FIG. 9 can be obtained without any trouble.

<Operation> Using the tilting rotary melting furnace having the above-described structure, for example, when melting scrap such as an aluminum engine with iron and recovering aluminum, as shown in FIG. ) The cylinder core wire (OO) is controlled to a tilted posture in which it is rearwardly lowered by about 15 to 20 degrees (β), and the above-mentioned substance to be melted is transferred from the inlet (11) on the front which is slightly upward. Put it inside the furnace tube (A) and open and close the door (23)
Cover with.

Then, the burner (29) projects fuel into the furnace barrel (A) to keep the inside of the furnace barrel (A) at a high temperature of about 1000 ° C. to melt the material to be melted. While holding the furnace tube (A) in the rearward tilted posture state of the above-described constant angle (β) or in the horizontal posture state as shown in FIG. 6, the capacity of the molten aluminum is increased and Under that posture, the rotation drive mechanism (C)
The furnace barrel (A) is rotated at an appropriate time and by an appropriate fixed amount.

By doing so, the material to be melted and the aluminum melt are uniformly mixed and stirred as a whole, and the flame of the fuel is evenly distributed around the material to be melted, and the melting is completed efficiently in a short time of about 60 minutes, for example. can do. In this case, since the furnace barrel (A) is held in the rearward-downward tilted posture state or the horizontal posture posture of the above-described constant angle (β), the substance to be melted is locally localized in the bottom of the furnace barrel (A). The molten metal does not accumulate in a concentrated manner, and the molten metal spreads over the entire surface to a uniform winding action state.

Further, during the melting work, smoke is discharged not only from the smoke exhaust duct (27) of the opening / closing door (23) but also from the exhaust port (12) opening on the rear surface of the furnace tube (A). Incomplete combustion does not occur in (A), and the worker can also work on the front surface of the furnace tube (A) without danger from smoke emission or blowback flame.

After the melted substance is melted, the cylinder core wire (OO) of the furnace cylinder (A) is converted to an inclined posture state of descending forward by about 45 degrees (γ) as shown in FIG. 8, and the door is opened. Ladle (36) through the chute (35) from the inlet (11) kept in the state
The molten aluminum is taken out and collected.

For objects to be melted such as the aluminum engine with iron,
Since the melting point of iron is higher than that of aluminum, and iron and ash will remain as residues in the inside of the furnace tube (A), finally the core wire (OO) of the furnace tube (A) As shown in FIG. 9, the direction is changed by about 90 degrees (θ) from the state of FIG. 6 described above, and the discharge port (12) on the rear surface is maintained in a vertical posture in which the discharge port (12) is downward. The residue is discharged by gravity. As a result, it is possible to easily and completely discharge the residue to the outside of the furnace tube (A) without the dust being dispersed.

<Effects of the Invention> In summary, in the present invention, the crucible-type furnace tube (A) is provided with the inlet (11) for the material to be melted and the opening / closing door (23) on the front surface of the furnace tube due to its structure. The circumferential body surface of A) is supported by the seesaw-type support frame (B) so as to be rotatable around the cylinder core wire (OO), and by the rotation drive mechanism (C) mounted on the support frame (B). , The furnace tube (A) can be rotated, and the middle of the support frame (B) is installed on the installation stand (D).
To be pivotally supported by a horizontal axis (32) orthogonal to the core wire (OO) of the furnace tube (A), and the furnace tube (A) is predicted by the rocking control mechanism (E). Angle range (α)
In the tilting rotary melting furnace that is designed to change the inclination only, the smoke and residue discharge port (12) is formed on the rear surface of the furnace cylinder (A), and the fixed angle range (α ) Is the core wire (O-
O) was erected vertically from a posture inclining at an angle of about 45 degrees to the vertical direction, and was changed to a vertical posture in which the surface was downward, with a total posture of at least about 135 degrees from the posture in which the rear surface was downward. Furnace barrel (A)
Since it is set so that the residue such as iron and ash can be discharged by gravity from the discharge port (12) of the above, it is possible to completely improve the problems of the prior art mentioned at the beginning, and This has the effect of significantly improving efficiency and the work environment.

[Brief description of drawings]

1 and 2 are schematic side view and front view of the tilting rotary melting furnace according to the present invention, and FIG. 3 is a front view showing an open state of an opening / closing door corresponding to FIG. 2, FIGS. Are lines 4-4 and 5-5 in Fig. 1.
6 is a sectional view taken along line 6-6 of FIG. 2, FIG. 7 is a side sectional view in a melting action state corresponding to FIG. 6, and FIGS. 8 and 9 are also FIG. FIG. 3 is a side sectional view of a tapping action state and a residue discharge action state corresponding to FIG. (11) …… Inlet (12) …… Outlet (23) …… Opening and closing door (32) …… Horizontal axis (A) …… Furnace barrel (B) …… Support frame (C) …… Rotary drive mechanism (D) …… Installation stand (E) …… Swing control mechanism (α) …… Swing angle range (OO) …… Cylinder core wire

Claims (1)

[Scope of utility model registration request] 1. A crucible-type furnace cylinder (A) is provided with an inlet (11) for a material to be melted and an opening / closing door (23) on the front surface thereof, and a peripheral surface of the furnace cylinder (A) is a seesaw type. The support frame (B) is supported so as to be rotatable around the cylinder core wire (OO), and the furnace cylinder (A) can be rotated by the rotation drive mechanism (C) mounted on the support frame (B). The support frame (B) in the middle, the installation stand (D)
To be pivotally supported by a horizontal axis (32) orthogonal to the core wire (OO) of the furnace tube (A), and the furnace tube (A) is predicted by the rocking control mechanism (E). Angle range (α)
In a tilting rotary melting furnace that is designed to change the inclination only, a smoke or residue discharge port (12) is formed on the rear surface of the furnace cylinder (A), and the constant angle range (α ) Is the core wire (O-
O) was erected vertically from a posture inclining at about 45 degrees to the front, and it was changed to a vertical posture in which the surface was downward, with the overall posture being at least about 135 degrees from the posture to downward in the rear surface. Furnace barrel (A)
The tilting rotary melting furnace is characterized in that residues such as iron and ash can be discharged from the above discharge port (12) by gravity falling.