CN204373386U - Composite crucible capable of preventing slag adhesion for induction furnace - Google Patents

Abstract

The utility model provides a composite crucible for an induction furnace capable of preventing sticky slag, which is characterized in that it includes an inner corundum or magnesium crucible, a graphite collar, and an outer magnesium crucible, and the graphite collar is placed on the upper part of the inner crucible , a magnesium crucible is set outside the graphite collar and outside the inner crucible; the gap between the inner and outer crucibles is a layer of quartz sand. The utility model perfectly solves the problem of sticky slag on the inner wall of the crucible during the smelting of a small induction furnace, does not affect the smelting efficiency, can also ensure the purity of the metal melt, and truly realizes efficient and safe smelting.

Description

A composite crucible for induction furnace capable of preventing sticky slag

technical field

The utility model relates to the technical field of small-scale metal smelting equipment, in particular to a composite crucible for induction heating.

Background technique

As we all know, small induction furnaces have the advantages of high efficiency. Whether they are used for metal smelting or scientific research experiments, they have the advantages of cost and efficiency. Therefore, small induction furnaces are widely used in industrial production and scientific research fields. The crucible is a key part of the induction furnace, which plays a key role in the quality of smelting products. Graphite crucibles are widely used in the metal casting and smelting industry. In some cases, graphite crucibles cannot be used to prevent melt carburization.

In this case, a magnesia or corundum crucible must be used, but when it is used for induction furnace heating, the magnesia or corundum crucible does not have the function of self-heating, and the metal can only be melted by the induction heat release of the metal in the crucible. The slag is not easy to melt, even if the slag has been melted, the slag adheres to the inner wall of the crucible due to the low temperature of the upper part of the crucible. In addition, due to the rapid heat dissipation of small induction furnaces, it is difficult to ensure the melting of slag by using pure corundum or magnesium crucibles, which not only affects the addition of alloys, but also easily causes the molten metal to absorb oxygen. On the other hand, if the slag is used for dephosphorization and desulfurization At the same time, because the slag cannot fully interact with the molten metal, the phosphorus and sulfur in the molten metal will eventually exceed the standard.

In order to solve the above problems, the patent "a graphite melting crucible with a built-in ceramic crucible" (application number: CN201020640982.8) discloses a new type of crucible. Disclosed is a graphite smelting crucible with a built-in ceramic crucible. A ceramic crucible is placed in the graphite smelting crucible. When the ceramic crucible is placed in it, it is required to be relatively compact without shaking. The utility model can be used in a high-frequency induction furnace to ensure no pollution of gold. However, since the outside of the crucible is an integral graphite crucible, when the electric induction heating is applied, the graphite crucible will generate heat by induction, and then melt the metal in the ceramic, so the thermal efficiency is low and the heating time is long. If it is used for high melting point metal melting, the induction heat of graphite crucible is not even enough to melt the metal due to the rapid heat dissipation of the small induction furnace.

Therefore, in order to solve the above contradictions, it is necessary to adopt a composite crucible with a more reasonable structure.

Utility model content

In order to solve the problem that corundum or magnesium crucibles are easy to stick to slag, the utility model provides a composite crucible for induction furnaces that can prevent slag from sticking. Melting refractory metals.

The technical scheme of the utility model is: including inner corundum or magnesia crucible, graphite collar, quartz sand filler, and outer magnesia crucible. In order to ensure high-efficiency smelting, a magnesium crucible is put on the outside of the graphite collar and the outside of the inner crucible; at the same time, in order to prevent the inner crucible from bursting and resulting in leakage of molten metal, an inner and outer composite crucible is used, and the gap between the inner and outer crucibles is Quartz sand layer to solve this problem.

The crucible of the utility model has the advantages that the inner crucible is made of magnesium or corundum, which can prevent the carbonization and pollution of molten metal or molten slag; the graphite collar can ensure the induction heat release without metal, and prevent slag from sticking; between the inner and outer crucibles The high-quality quartz sand can prevent the internal crucible from bursting and cause molten metal to flow out; the external magnesia crucible can support the quartz sand and prevent the leakage of molten metal from burning the induction coil or accessories in the furnace. The utility model perfectly solves the problem of sticky slag on the inner wall of the crucible during smelting of a small induction furnace, and at the same time does not affect the smelting efficiency, can also ensure the purity of the metal melt, and truly realize efficient and safe smelting.

Description of drawings

Fig. 1 is a sectional view of the utility model structure.

Among them: 1 corundum or magnesia crucible, 2 graphite collar, 3 quartz sand, 4 magnesia crucible.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in the figure, the utility model includes an inner corundum or magnesia crucible 1, a graphite collar 2, quartz sand 3, and an outer magnesia crucible 4. A graphite collar 2 is placed outside the upper part of the inner corundum or magnesium crucible 1, and the graphite collar 2 is in close contact with the outer wall of the inner crucible 1; a magnesium integral crucible 4 is placed on the outside of the graphite collar 2 and the inner crucible 1 ; At the same time, the gap between the inner and outer crucibles is filled with quartz sand 3 .

The above-mentioned embodiments are only one of the more preferred specific embodiments of the present invention, and relevant conventional changes adopted by those skilled in the art according to the present invention shall all fall within the protection scope of the present invention.

Claims (1)

1. one kind can the induction furnace combined type crucible of slag adhesion, it is characterized in that, comprise inner corundum or magnesia crucible, the graphite collar, outside magnesia crucible, lay the graphite collar on the top of interior crucible, have magnesia crucible in graphite collar outside and interior crucible outer cover; Gap in the middle of interior outer crucible is quartz sand layer.