JPS6017677Y2 - melting furnace - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a melting furnace.

Conventionally, in a melting furnace where the furnace is constructed of refractory bricks, molten metal spilled from the crucible inside the furnace during operation of the furnace, or molten metal that flows out due to breakage of the crucible, is exposed to the refractory bricks forming the furnace, especially the hearth. The problem was that when it cooled and solidified, it expanded and destroyed the furnace.

On the other hand, since the crucible is generally made of graphite, which is easily damaged, the crucible is often damaged during melting due to force majeure, and this, combined with the above-mentioned circumstances, often causes the furnace to break down, resulting in reduced productivity. It is also a big problem economically.

In view of the above-mentioned conventional circumstances, the purpose of the present invention is to prevent the destruction of the furnace by providing a hot water receiver in the furnace. The present invention is characterized in that the hot water basin is removably inserted and the hot water basin is made of lava.

Hereinafter, one embodiment of the melting furnace of the present invention will be explained with reference to the drawings. Fig. 1 is a front sectional view showing the usage state of the melting furnace of the present invention;
FIG. 2 is a cross-sectional view taken along the line ■-■, and is cut out from the furnace 1, the casing 2, the crucible 3, etc.

The furnace 1 is constructed of refractory bricks, and a furnace wall 1b is erected in a rectangular cylindrical shape on a hearth 1a, and a lid plate 4 is removably covered on the upper end surface of the furnace wall 1b. A burner 5 is attached to a suitable location in the middle of the furnace wall 1b, and can be moved in and out of the furnace 6, and an iron skin 7 is stretched over the lower surface of the hearth 1a with a heat insulating layer 8 interposed therebetween.

Further, the heat insulating layer 8 is formed by laying a heat insulating material made of lava.

Incidentally, the shape of the furnace 1 is not limited to the above-mentioned shape, and it may be constructed in any shape such as a round shape.

The hot water basin 2 is made by processing dense lava into a plate shape of a predetermined size.
It is assembled into a square shape that matches the shape of the inside of the furnace 6, and is bonded with a bonding agent 9 made of a mixture of keido, ceramic, and lava powder in a predetermined mixing ratio, and is inserted into the inside of the furnace 6 so that it can be taken out from above. insert the outer peripheral surface between the lower part of the furnace wall 1b and the hearth 1
a Contact with the inner surface.

Further, the capacity of the water receiver 2 is set to be at least larger than the capacity of the crucible 3.

Incidentally, the hot water basin 2 may be formed by carving a lump of lava, or may be formed by mixing pulverized lava with geite and ceramic in a predetermined ratio and sintering the mixture.

The crucible 3 is placed in the center of the water pan 2, and its upper part is inserted into a support hole 4' of a cover plate 4 that covers the upper end surface of the furnace wall 1b.

Therefore, when an ingot (not shown) to be melted is placed in the crucible 3 and the burner 5 is ignited to operate the furnace 1, the ingot is melted and the crucible 3 is filled with molten metal 11.

At this time, if the crucible 3 is scratched or has become thin due to oxidation, that part will be damaged by sudden temperature changes, pressure and vibration of the molten metal 11, and the molten metal 11 in the crucible 3 will be damaged. Although the molten metal 11 flows out and falls downward, all of this molten metal 11 is received and stored in the molten metal receiver 2.

Therefore, when the crucible 3 is damaged and the molten metal 11 flows out, the burner 5 is stopped, the molten metal 11 is pulled out of the furnace 1, the crucible 3 is removed after waiting for it to cool down, and the cover plate 4 is removed and the molten metal 11 is removed.
As soon as it is lifted up, it is taken out of the furnace 1, and then it is removed from the furnace 2.
Remove the metal (not shown) that has solidified inside.

In this case, the metal that solidifies in the molten metal basin 2 can be easily removed by applying a light impact with a hammer or the like, since the molten metal basin 2 is made of lava that is highly removable from metal.

Therefore, the molten metal receiver 2 from which the metal has been removed is inserted into the furnace, and the supporting stand 10, the lid plate 4, and the new crucible 3 are sequentially installed in the predetermined positions by reversing the steps described above, and the ingot is melted again. can be done.

Incidentally, in the above embodiment, the outlet for the molten metal receiver 2 is provided on the upper surface of the furnace 1, but the present invention is not limited to this. It is optional that when the molten metal casing 2 is inserted into the furnace 6, the side wall of the molten metal casing 2 on the extraction side forms the furnace wall 1b.

In addition, the means for taking out the hot water pan 2 is to fix a locking piece with excellent heat resistance such as molybdenum steel to the upper end surface of the hot water pan 2 in advance, and to engage a hook or the like with this to pull it up. It is also optional to carve a locking groove on the inner surface of the upper part and engage a locking rod or the like thereto to pull it up.

As described above, in the present invention, the molten metal is removably inserted into the furnace and the molten metal is made of lava, so that the molten metal that flows out due to damage to the crucible is transferred to the refractory bricks that form the hearth and the lower part of the 4-hole. This prevents molten metal from flowing into the joints, preventing the furnace from being destroyed. In addition, since the molten metal is made of lava, which has excellent heat resistance and peelability from metal, it is possible to prevent metal from adhering to the inner surface of the molten metal. It can be easily removed and molten metal can be produced again in a much shorter time than conventionally when a furnace was built each time, which has great economic and practical effects.

Therefore, the intended purpose can be a distant relative.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view showing the state in which the melting furnace of the present invention is used, and FIG. 2 is a cross-sectional view taken along the line ■-■. 1 is a furnace, 1a is a hearth, 1b is a furnace wall, 2 is a hot water pan, and 3 is a furnace.
is a crucible.

Claims (1)

[Scope of utility model registration request] In a melting furnace in which the furnace is constructed of refractory bricks, a molten metal receiver that covers the lower part of the furnace wall and the inner surface of the hearth is removably inserted into the furnace, a crucible is placed on the molten metal receiver, and the molten metal receiver is made of lava. A melting furnace made of