JPS595702Y2 - Shotting tray - Google Patents

Description

[Detailed description of the invention] The present invention relates to a molten metal flowing device installed above a cooling tank for making metal shot, and is particularly suitable for making molten metal into a trickle using an overflow method and making it flow down. Related to trays.

In the metallurgical industry, metals and alloy materials are often used in shot form.

It is desirable that such shots have as uniform dimensions as possible.

For example, shots of various ferroalloys such as ferronickel are cut out in fixed amounts from a hopper before being fed into a furnace, etc., but the shots are irregular in shape and often have unevenness or protrusions, making it difficult to cut them out smoothly. I can't work.

In addition, magnetic cranes are often used to transport magnetic materials, but shots with many unevenness and protrusions have poor magnetic attraction.

In addition, in operations such as storage, transportation, and loading, shots with uniform dimensions are more convenient because the amount handled is constant.

Conventionally, metal shot has been manufactured by causing molten metal to flow down in shredded form from above a cooling tank containing a cooling medium such as water or oil.

For example, shots have been created by letting the molten metal flow down and collide with a scattering member, and then solidifying the droplets that scatter in all directions, or by letting the molten metal flow down into a cooling tank through a wire mesh or the like.

However, the shots prepared by these methods have large variations in size and shape, and are not suitable for the above purpose.

In order to produce shots with uniform dimensions and shapes, in addition to factors such as the type of cooling medium in the cooling tank, cooling conditions such as cooling temperature, falling distance of the molten metal, and temperature of the molten metal, the flow condition of the molten metal has a major influence. have.

It is desired that the molten metal flows down in a steady stream as a steady stream.

If the flow of the molten metal is too strong or turbulent, the shape of the raw shot will become distorted.

Also, unless the trickle flows down in a constant state, the size and shape will be disturbed.

The present invention is based on the above consideration regarding the flowing state of the melt,
It is an object of the present invention to provide a molten metal flowing tray suitable for producing shots of a certain size and shape.

FIG. 1 shows a perspective view of a tray 1 of the present invention.

The tray 1 consists of a reservoir 2 and an outlet lip 3.

The reservoir 2 is filled with molten metal from a gutter or container, and the molten metal flows out of the reservoir 2 through the outlet lip 3 in an overflow manner.

A large number of grooves 4 are formed in the lip portion 3 in an uneven shape.

The molten metal overflowing from the reservoir passes through the groove in the lip and flows down as a trickle.

The tip of the lip portion 3 is preferably shaped into a sharp point for better drainage.

The tray body is made of a refractory material such as alumina, but the outlet lip 3 is made of carbon because it is subject to severe wear and tear.

In a test example using ferro-nickel molten metal, the tray made entirely of alumina became unusable after 3 to 4 shot operations, but the tray whose lip was made of force-bond could not be used after 3 or 4 shots.
It was able to withstand five operations.

Figures 2 and 3 show an embodiment of the tray of the present invention being placed on a cooling bath and used in conjunction with a molten metal holding vessel and a trough.

Number 6 is a tiltable molten metal holding container, which is tiltable between the two positions shown.

During operation, the molten metal poured out from the holding container passes through the gutter 8 and quietly flows into the tray 1 in a fixed amount.

The gutter 8 consists of an enlarged section and a sloped section, the sloped section being inclined at a very small angle, for example 10[deg.].

The molten metal that has quietly flowed into the tray 1 overflows from there in the form of a trickle in the manner described above.

The tray 1 is placed on a pedestal 9 mounted on a cooling tank 10.

The cooling tank 10 stores water, oil, water and oil, and other cooling fluids, and solidifies the flowing molten metal stream into shots.

The height of the pedestal can be adjusted freely.

The flow rate of the molten metal from the holding container 6 through the gutter 8 must be adjusted according to the cross section of the reservoir, the groove depth, etc., so that the molten metal can flow out in a trickle from the reservoir 2 through the groove 4 in the lip. It won't happen.

When this tray was used in conjunction with a cooling tank containing an upper oil layer and an upper water layer, a high carbon ferronickel molten metal was subjected to a shot forming test, and shots with a uniform size and shape close to a spherical shape with a diameter under 50 mm were obtained.

As explained above, the present invention provides an overflow tray having a carbon outlet lip with uneven grooves to allow the molten metal to flow down into the cooling tank in a gentle trickle. The invention provides a long-life molten metal flowing device suitable for shot production of fixed dimensions and shapes.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the tray of the present invention, FIG. 2 is a front view of equipment showing the actual usage of the tray of the present invention, and FIG. 3 is a top view of FIG. 2. 1: tray, 2: reservoir, 3: lip, 4: groove, 6: molten metal holding container, 8: gutter, 10: cooling tank.

Claims (1)

[Scope of utility model registration request] A tray installed above a cooling tank for making ferronickel shot, which consists of a molten metal storage part and an outlet lip part for receiving the molten metal overflowing from the storage part, and the outlet lip part is made of carbon. And a tray for making ferronickel shot, characterized by having a plurality of uneven horizontal grooves.