JPS6221911Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a non-ferrous metal rapid melting furnace that rapidly melts aluminum or the like using the direct flame of a burner.

Traditionally, this type of melting furnace has a tower-shaped furnace body.
The material to be melted is introduced through the upper opening and rapidly melted in the lower melting chamber. Therefore, the furnace height is 8
The height was ~9m, which could not be accommodated by the height of a normal factory building, requiring a special building, which led to problems such as higher equipment costs.

This idea is for a non-ferrous metal rapid melting furnace, in which an ingot preheating chamber and a scrap charging chamber are installed in a place that communicates with the melting chamber, and the furnace height is 4 to 5 meters, which is about half the height of the conventional tower type. In addition to being able to fit within the height of a building, the exhaust from the burner installed facing the melting chamber and holding chamber preheats the ingots and scrap, reducing the heat of melting. .

An embodiment of a non-ferrous metal rapid melting furnace according to this invention will be described based on FIG.

1 is a holding chamber, 2 is a molten metal tank provided at the lower part of the holding chamber, and is provided with a constantly lit burner 3 and a tap 4. A melting chamber 5 is arranged adjacent to the holding chamber 1, and the lower end of the inclined floor 6 of the melting chamber is connected to the metal line 7 of the holding chamber 1. Further, a burner 13 is arranged in the melting chamber 5 so as to apply direct flame to the object to be melted, such as an ingot. Reference numeral 8 denotes an ingot preheating chamber provided adjacent to the upper end of the inclined floor 6 of the melting chamber 5, and a floor surface 9 of the ingot preheating chamber 8 is connected to the upper end of the inclined bed 6 of the melting chamber 5. Reference numeral 10 denotes an ingot charging door, which is provided on the opposite side of the ingot preheating chamber 8 from the melting chamber 5. Reference numeral 11 denotes an ingot pusher provided outside the ingot charging door 10, which can push the ingot B placed in the ingot preheating chamber 8 to the melting chamber 5. Reference numeral 24 denotes a hanging wall provided at the connection between the ceiling of the melting chamber 5 and the ceiling of the holding chamber 1, and is designed to prevent unmelted ingots from passing through. 12 is a scrap charging chamber provided above the melting chamber 5. The cross section of the scrap charging chamber 12 is formed to be approximately narrower than the upper surface of the ingot. Thus, the exhaust gas from the burners 3 and 13, which are installed facing the holding chamber 1 and the melting chamber 5, is led to the exhaust duct 14 through the ingot preheating chamber 8 and the scrap charging chamber 12.

However, in the embodiment shown in FIG.
Movable ceiling cover 15 in the scrap charging chamber 12
is provided, and the ceiling cover 1 is connected by the fluid cylinder 16.
When 5 is opened, the scrap S suspended from the crane 17 is loaded into the scrap loading chamber 12 through the opening 18 in the ceiling.
It is configured so that it can be inserted inside.

Further, in the embodiments shown in FIGS. 2 and 3, a scrap preheating chamber 19 is provided on the side of the scrap charging chamber 12, a scrap inlet 20 is provided on the ceiling of the scrap preheating chamber 19, and a scrap A scrap pusher 2 that ejects the scrap placed in the preheating chamber 19 into the scrap charging chamber 12
1. Note that 14a and 14b are exhaust ducts.

Next, the usage will be explained based on FIG.

Ingot A is placed on the lift 22 by the pool conveyor 23 in advance. The ingot charging door 10 is opened, and the ingot A on the ingot lift 22 is pushed into the ingot preheating chamber 8 by the ingot pusher 11. Then, ingot B, which had already been preheated in ingot preheating chamber 8,
Only one portion is moved toward the dissolution chamber 5. At this time, the hanging wall 24 prevents the ingot C from moving excessively.

Here, the ceiling cover 15 is opened and the scrap S is thrown onto the ingot C. At this time, the cross section of the scrap charging chamber 12 is formed so as to be narrower than the upper surface of the ingot C, and the ingot preheating chamber 8
Since the height of the room is configured to be slightly higher than the height of ingot B, the dropped scrap S will be placed on the sloped floor 6.
will not be directly hit. Next, the burner 13 is ignited to melt the ingot C and the scrap S, and the melted water flows into the holding chamber 1. At this time, the ingot B is preheated by the exhaust from the burners 3 and 13. Repeat the same operation thereafter.

In the case of FIGS. 2 and 3, the scrap S is placed in the scrap preheating chamber 19 in advance.
Immediately after a new ingot C is placed in the melting chamber 5, the scrap is dropped onto the ingot C by a scrap pusher 21, and then new scrap is sent into the scrap preheating chamber 12.

As mentioned above, the nonferrous metal rapid melting furnace according to this invention has a holding chamber 1 in which a molten metal tank 2 is provided at the lower part.
A melting chamber 5 is arranged adjacent to the melting chamber 5, and the lower end of the inclined floor 6 of the melting chamber 5 is connected to the metal line 7 of the holding chamber, and a burner 13 is arranged in the melting chamber 5 so as to apply direct flame to the material to be melted. In addition, an ingot preheating chamber 8 is provided adjacent to the upper end of the inclined floor 6 of the melting chamber, and the interior height of the ingot preheating chamber 8 is configured to be slightly higher than the height of the ingots.
An ingot charging door 10 is provided on the opposite side of the ingot preheating chamber 8 from the melting chamber 5, connecting the floor surface 9 of the ingot and the upper end of the inclined floor 6 of the melting chamber 5, and moving in the vertical direction. An ingot pusher 11 is provided outside the door 10 to push the ingot B placed in the ingot preheating chamber 8 to the melting chamber 5. While a hanging wall 24 is provided to prevent the ingot C from passing through, a blow-out type scrap charging chamber 12 is provided above the melting chamber 5, and the cross section of the scrap charging chamber is formed to be approximately narrower than the upper surface of the ingot. Furthermore, a movable ceiling cover 15 is provided in the scrap bag entry chamber 12 so that scraps can be thrown in from an opening in the ceiling,
Furthermore, the exhaust gas from the burners 3 and 13 installed facing the holding chamber 1 and the melting chamber 5 is guided to the exhaust ducts 14, 14a, 14b via the ingot preheating chamber 8 and the scrap charging chamber 12. be. According to the present invention, the ingot can be preheated, and the scrap placed on the ingot is preheated by the exhaust gas generated from the ingot melting burner and the holding chamber burner until the ingot is melted. , thermal efficiency can be significantly improved. In particular, as shown in FIGS. 2 and 3, if a scrap preheating chamber 19 is provided on the side of the scrap charging chamber 12, the thermal efficiency can be further improved.

Conventional non-ferrous metal rapid melting furnaces...Compared to tower-type non-ferrous metal rapid melting furnaces, which have a melting chamber at the bottom of the tower and ingots and scraps are introduced and dropped from the top of the tower. The advantages of the invented melting furnace are as follows.

(b) Because the structure is such that ingots are charged from the side, the height of the tower can be kept low, and therefore the height of the building can also be kept low.

(b) Since the preheating chamber is divided into an ingot preheating chamber and a scrap preheating chamber in parallel, the preheating effect is large and the thermal efficiency is high.

(c) Since the preheated ingot is extruded horizontally into the holding chamber at a constant speed, there is no impact drop or collision unlike in the conventional tower type, and the semi-molten material stays in front of the burner. This eliminates blockages, interruptions in work, and corrosion of refractories caused by aluminum.

(d) In the tower type, ingots and scraps fall from the ceiling, which causes severe damage to the tower's hearth bricks.Even if hard bricks are used, this damage cannot be prevented, but the structure according to the present invention Since the scrap falls on the top surface of the ingot, it does not damage the hearth bricks and is extremely economical.

[Brief explanation of the drawing]

The drawings show an embodiment of the non-ferrous metal rapid melting furnace according to this invention. Fig. 1 is an overall vertical cut front view of the first embodiment, and Fig. 2 is an overall vertical cutaway view of the second embodiment. Cutaway front view, Figure 3 is the 2nd
FIG. 1... Holding chamber, 2... Molten metal tank, 3... Burner, 5... Melting chamber, 6... Inclined floor, 8... Ingot preheating chamber, 9... Floor surface, 10... Ingot charging door , 11... Ingot push shear, 12...
Scrap charging chamber, 13...burner, 14,1
4a, 14b... Exhaust duct, 15... Ceiling cover, 19... Scrap preheating chamber, 20... Scrap inlet, 21... Scrap pusher, 2
4... Hanging wall, A, B, C... Ingot, S...
... Scrap.

Claims (1)

[Scope of utility model registration request] In a non-ferrous metal rapid melting furnace where the material to be melted is melted by the direct flame of a burner, the melting chamber is located adjacent to the holding chamber in which the molten metal tank is installed at the bottom, and the lower end of the sloped floor of the melting chamber is It is connected to the metal line of the holding chamber, a burner is arranged in the melting chamber so as to apply direct flame to the material to be melted, and an ingot preheating chamber is provided adjacent to the upper end of the sloped floor of the melting chamber.
The indoor height of the ingot preheating chamber is configured to be slightly higher than the height of the ingots, and the floor surface of the ingot preheating chamber is connected to the upper end of the inclined floor of the melting chamber, and the ingot preheating chamber is arranged vertically on the opposite side of the melting chamber. A movable ingot charging door is provided, and an ingot pusher is provided outside the ingot charging door that can push the ingots placed in the ingot preheating chamber to the melting chamber. A hanging wall is provided at the connecting part of the melting chamber to prevent the ingot from passing through, while an open-air scrap charging chamber is provided above the melting chamber, and the cross section of the scrap charging chamber is formed so that it is almost narrower than the upper surface of the ingot. Furthermore, a movable ceiling cover is installed in the scrap loading chamber so that scrap can be loaded through an opening in the ceiling, and the exhaust from the burner installed facing the holding chamber and melting chamber is used to preheat the ingots. A non-ferrous metal rapid melting furnace characterized by being configured such that the furnace is guided through a chamber and a scrap charging chamber to an exhaust duct.