JPH038944Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to a rotary melting furnace used for melting metals such as aluminum ingots and aluminum scraps.

[Conventional technology]

A conventional rotary melting furnace is constructed as shown in FIG. FIG. 3 is an axial cross-sectional view of a conventional rotary melting furnace, in which 1 indicates a base, 2 a tilting table, and 3 a furnace body. The base 1 and the tilting table 2 are each constructed of rectangular steel frames. The furnace body 3 is configured as a hollow rotating body with a refractory 30 lined inside an iron shell 31, and its axial cross-sectional shape is circular. The furnace body 3 is provided with a steel tire 34 on a tire support member 37 whose side surface is ribbed over its entire circumference.
4, the support roll 35 arranged on the tilting table 2,
35 in a horizontal position. Tilt table 2
The support roll 35 on one side of the support roll 35 is connected to a motor (not shown), and the support roll 35 is driven by the motor to rotate the furnace main body 3 placed thereon.

In the furnace body 3 of the rotary melting furnace constructed as described above, metal such as aluminum ingots accommodated through the tap hole 32 is stirred by the rotation of the furnace body 3, and is moved to the opposite side of the tap hole 32 located at the front end of the furnace body. It is heated and melted by a burner (not shown) from the burner mounting port located in the figure. When melting is completed, the furnace body 3 is tilted and the melt is tapped from the tap.

[The problem that the idea attempts to solve]

By the way, in the conventional rotary melting furnace as described above, since the axial cross-sectional shape of the furnace body is circular, when melting metal materials such as aluminum ingots or aluminum scraps, the amount of stirring of the metal material is small and heating is difficult. There were problems such as low efficiency and poor melting effect.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotary melting furnace that can stir a large amount of metal material, has high heating efficiency, and has good melting efficiency.

[Means to solve the problem]

A rotary melting furnace according to the present invention has a horizontal rotating shaft and melts metal contained therein, and the furnace body has a axial cross-sectional shape in which a plurality of circular shapes protrude from the center in the radial direction. It is characterized by a distorted shape.

〔work〕

In the case of this invention, since the axial cross-sectional shape of the furnace body is a circular shape that is distorted with multiple protrusions in the radial direction from the center, the inner wall connecting each of the protruding parts has a gentle arc shape, Even when the protruding part moves to a high position such that most of the metal material in the circular cross section is lowered due to the rotation of the main body, the gentle arc-shaped part located below the protruding part remains in the horizontal plane. Since the angle with respect to the protrusion is small, the metal material accumulated in the protruding portion is difficult to fall. As a result, a large amount of the metal material accumulated in the protruding portion falls from a position higher than the furnace having a circular cross section, so that the momentum of the metal material within the furnace increases. As a result, the occurrence of destruction due to the collision of the metal material with the inner wall of the furnace increases, the flow of the molten metal becomes active, the heating efficiency is increased, and the melting time is shortened compared to the conventional method.

〔Example〕

The present invention will be specifically explained below based on drawings showing embodiments thereof.

Fig. 1 is a partially cutaway side view of a rotary melting furnace according to the present invention (hereinafter referred to as the inventive furnace), and Fig. 2 is a sectional view taken along the - line in Fig. 1, where 1 is a base and 2 is a tilting table. , 3 indicates the main body. The base 1 and the tilting table 2 are each made of a rectangular frame made of shaped steel, and one end thereof, that is, a position near both sides of the front end where the outlet 32 of the furnace body 3, which will be described later, is located. Bearings 12, 12 are provided at required heights using upright support rods 11, 11, and shafts 13, 13 are used for both bearings 12, 12 to extend from the front end of the tilting table 2. The tip portions of support arms 21, 21 extending obliquely upward are pivotally supported. Tilt table 2
Support members 22, 2 are provided on both sides of the intermediate portion in the front and rear directions.
2 are provided, and hydraulic cylinders 23, 23 are provided between the support members 22, 22 and the floor surface. Each support member 22, 22 has a guide roller 22b for position regulation, which rolls into contact with the side surface of tires 34, 34 of the furnace main body 3, which will be described later, at the upper end of a pair of columns 22a, 22a, which are erected in parallel on the tilting table 2. 22b, and a bracket 22c protrudes from the outer surface, and the operating rods 23a, 23a of the hydraulic cylinders 23, 23 are attached to this bracket 22c.
By the operation of the respective hydraulic cylinders 23, 23, the tilting table 2 is moved around the shaft 13 to be in contact with and parallel to the base 1 as shown by the solid line in FIG. 3 maintains its center of rotation substantially horizontally, and the furnace body 3 can be tilted so that its outlet 32 is directed downward, as shown by the broken line in FIG.

The furnace body 3 is constituted by a hollow rotating body with a refractory material 30 such as a caster or refractory bricks lined inside an iron skin 31, and its axial cross-sectional shape is circular with a plurality of distorted protrusions in the radial direction from the center. It is shaped like a triangular rice ball, and has an outlet 32 at the front end that also serves as exhaust.
However, a burner mounting port 33 is opened at the rear end. And in front of the middle part of the furnace body 3,
Steel ring-shaped tires 34, 34 are fixed to tire supports 37, 37 whose sides are ribbed around the entire circumference at a position near the rear end. It is mounted horizontally on a plurality of support rolls 35 provided on the tilting table 2, and in this state, both guide rolls 22c, 22b provided on the support members 22, 22 face the opposing inner surfaces of the tires 34, 34, and the furnace Movement of the main body 3 in the axial direction is restricted. The support rolls 35 on one side of the tilting table 2 are each supported by bearings 3 provided on both side edges of the tilting table 2 at a required interval at a shaft 35a.
5b, a gear 38a provided at one end of the shaft 35a, and a gear 38b meshing with the gear 38a.
It is connected to a motor M also provided on the tilting table 2 via a speed reducer 38c, and the support roll 35 is rotated by the drive of the motor M, so that the furnace body 3 placed thereon is rotated. It's getting old.

In addition, 39 in the figure is a duct, which is attached to the outlet 32 of the furnace body 3 using a hood 39a during melting operation, and is designed to guide exhaust gas to a chimney (not shown).

Therefore, an aluminum ingot is placed inside the furnace body 3.
Alternatively, metal materials such as aluminum scraps are stored, and the burner is installed in the installation port 33 of the furnace body 3, and the tap outlet 32 is installed.
The furnace body 3 is rotated by driving the motor M, and the metal material is heated and melted by a burner while being stirred in the furnace.
When the melting is completed, the hood 39a is removed, and the hydraulic cylinder 23a is actuated to rotate the tilting table 2 around the shaft 13, thereby tilting the furnace body 3 and tapping the tap water from the tapping port 32.

In the case of the furnace of this invention, the axial cross-sectional shape of the furnace body 3 is a distorted circular shape with multiple protrusions in the radial direction from the center, so the inner wall connecting each of the protruding parts has a gentle arc shape. Even when the protruding part moves to a high position where most of the metal material with a circular cross section falls due to the rotation of the furnace body, the gentle arc-shaped part located continuously below the protruding part will not move with respect to the horizontal plane. The angle is small, and the metal material accumulated on the protruding part is difficult to fall.

As a result, a large amount of the metal material accumulated in the protruding portion falls from a position higher than the furnace having a circular cross section, so that the momentum of the metal material in the furnace increases.

This increases the number of destruction phenomena caused by the protrusion of the metal material onto the inner wall of the furnace, and also increases the flow of the molten metal, increasing heating efficiency.

In addition, in this example, the internal shape of the furnace body was distorted by protruding from the center in the radial direction at three places, but the present invention is not limited to this.
It is also possible to use one having a number of protruding parts, such as two or more protruding parts.

[Effects] As detailed above, in the present furnace, the axial cross-sectional shape of the furnace body is a circular shape with multiple protrusions in the radial direction from the center, which reduces the amount of agitation of the metal material in the furnace. The present invention has excellent effects such as increasing the heating efficiency of the metal material, shortening the melting time, and improving the efficiency of the melting operation.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of the furnace of the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is an axial sectional view of a conventional rotary melting furnace. 1...base, 2...tilting table, 3...furnace body, 1
1... Support column, 12... Bearing bracket, 13...
Shaft, 22... Support member, 23... Hydraulic cylinder,
31... Iron skin, 32... Outlet, 33... Mounting port, 34... Tire, 35... Support roll,
38a, 38b...gear, M...motor.

Claims (1)

[Claims for Utility Model Registration] A rotary melting furnace having a horizontal rotating shaft for melting metal stored therein, wherein the axial cross-sectional shape of the furnace body is distorted by having a plurality of circles protruding from the center in the radial direction. A rotary melting furnace characterized by its vertical shape.