JPH073848U - Auxiliary material supply device for molten metal - Google Patents

Abstract

(57) [Abstract] [Purpose] The spraying work can be performed with a small device, and the worker does not need to approach the molten metal in the furnace, the ladle, the mold, etc. so much and the spraying amount can be kept constant. To provide an auxiliary material supply device for easily melting molten metal. [Composition] Auxiliary material inlet for molten metal such as mica 1
A transfer means 2 arranged below the charging port, a stirring chamber 3 for stirring the auxiliary material carried by the transfer means, a pressure feeding chamber 4 connected to the stirring chamber, a blower connected to the pressure feeding chamber, and the like. The fluid pressure generating device 5 and the discharge port 6 arranged at the end of the pressure feeding chamber are provided, and the auxiliary material charged in the charging port 1 is stirred and pressure-fed and discharged. Further, by arranging the back feeding means 7 for returning the surplus auxiliary material accumulated in the stirring chamber 3 to the charging port, it is arranged between the stirring chamber 3 and the charging port 1 to exceed the processing amount in the stirring chamber 3. Even if the auxiliary material is added, the auxiliary material does not accumulate in the stirring chamber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for supplying an auxiliary material to a molten metal for spraying the auxiliary material such as mica to the molten metal in a furnace, a ladle, a mold or the like.

[0002]

[Prior art]

 Conventionally, auxiliary materials such as additives such as mica have been sprayed for various purposes such as prevention of a decrease in surface temperature of molten metal in a furnace, a ladle, a mold, or the like. For large-scale equipment such as continuous casting, this is done by installing a sprinkling feeder that automatically moves above the molten metal surface near the furnace, etc., and then automatically sprinkling auxiliary materials from the spring feeder. In addition, while expensive and large-scale equipment has been developed and used, such as controlling its movement using a temperature sensor or computer, in the case of equipment that is not suitable for large-scale equipment, the worker is a ladle etc. Manual work such as scraping and sprinkling is also performed. However, in the case of manual work, it is necessary for the worker to approach a dangerous work site due to high temperature, and the spray amount tends to be uneven, making it difficult to obtain an accurate spray amount.

[0003]

[Problems to be solved by the device]

 Therefore, the present invention provides a device for supplying an auxiliary material to a molten metal, which can perform the spraying work with a small device, does not require the operator to approach the molten metal so much, and can easily make the spraying amount constant. It is something to do.

[0004]

[Means for Solving the Problems]

 The present invention solves the above problems by providing an auxiliary material supply device for spraying an auxiliary material such as mica on the surface of a molten metal, which is characterized by the following configuration. That is, the apparatus for supplying an auxiliary material to molten metal according to the first invention of the present application includes an auxiliary material input port 1 for molten metal such as mica, a transfer means 2 disposed below the input port, and a transfer means. A stirring chamber 3 for stirring the conveyed auxiliary material, a pressure feeding chamber 4 connected to the stirring chamber, a fluid pressure generating device 5 such as a blower connected to the pressure feeding chamber, and a discharge port arranged in front of the pressure feeding chamber. An outlet 6 is provided.

Further, in the auxiliary material supply device according to the second invention of the present application, the back feeding means 7 for returning the surplus auxiliary material accumulated in the stirring chamber 3 to the charging port is provided with the stirring chamber 3 and the charging port 1. It is characterized by being coordinated between and.

[0006]

[Action]

 In the present invention, the auxiliary material such as mica is transferred from the charging port 1 to the stirring chamber 3 by the transfer means 2 and sent to the pressure feeding chamber 4. Then, the auxiliary material is discharged from the discharge port 6 by the fluid pressure generating device 5 such as a blower connected to the pressure feeding chamber, and is sprayed on the molten metal surface. Further, by providing the back-feeding means 7 arranged between the stirring chamber and the charging port to return the excess auxiliary material accumulated in the stirring chamber to the charging port, the auxiliary amount exceeding the processing amount in the stirring chamber 3 is supported. Even if the material is added, the auxiliary material does not accumulate in the stirring chamber.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 9 relate to an auxiliary material supply device for molten metal according to an embodiment of the present invention.

This device is a relatively small device having a left-right length of about 1.5 m in FIG. 2, and its basic configuration is that the auxiliary material injection port 1 such as mica is coordinated to the lower part thereof. The screw conveyor 2 is provided, a stirring chamber 3 for stirring the auxiliary material carried by the screw conveyor 2, and a pressure feeding chamber 4 arranged below the stirring chamber. A fluid pressure generating device 5 such as a blower is connected to the pressure feeding chamber 4, and a discharge port 6 is provided at the tip of the pressure feeding chamber 4 so that a high-pressure fluid generated by the fluid pressure generating device 5 such as a blower (general The auxiliary material in the pressure feed chamber 4 is discharged from the discharge port 6 by using high pressure air, but other fluid may be used. Although not shown, a suitable hose or the like is connected to the discharge port 6, and the operator holds the tip of the hose to blow the auxiliary material onto the surface of the molten metal and supply it. . Further, between the stirring chamber 3 and the charging port 1, a backward feeding screw conveyor 7 is provided as a backward feeding means for returning the surplus auxiliary material accumulated in the stirring chamber 3 to the feeding port 1.

[0009] Explaining in detail from the input port 1, the input port 1 has an inverted triangular shape in a side view in which an upper part is largely opened, and two rotating bodies 8 and 8 are provided on the upper part. There is. Each of the rotating bodies 8 has a plurality of rod-shaped bodies 82 formed on a rotating shaft 81 so as to project in a substantially radial direction. A single rotating body 9 is provided at the center of the inlet 1. The rotary body 9 has a rotary shaft 91 to which a blade 92 extending in the longitudinal direction is attached. These rotating bodies 8 and 9 drop the auxiliary material such as mica put in the inlet 1 to the lower part of the inlet 1 while roughly stirring, so that a large amount of auxiliary material does not fall at a time. It also acts as a restriction. It is also possible to carry out without using such rotating bodies 8 and 9 if a person appropriately adjusts the input amount. Incidentally, it is possible to select and implement an appropriate number of rotating bodies.

A screw conveyor 2 is arranged below the charging port 1. The screw conveyor 2 has a rotary shaft 21 and spiral blades 22 attached to the rotary shaft 21. The rotary shaft 21 is fixed to one end of the charging port 1 and the other end of the crushing chamber 3, and the blades of the charging port 1 are connected to each other. From the entire length to part of the grinding chamber. In FIG. 2, the screw conveyor 2 is arranged so as to be biased to one of the upper two rotating bodies 8 and 8, but this is because the shape of the lower part of the inlet 1 is an isosceles inverted triangle. This is because there is not a biased inverted triangle, so if the shape of the lower part of the inlet 1 is an isosceles inverted triangle, the screw conveyor 2 should be located approximately in the center of the upper two rotating bodies 8, 8. Is preferred. The number of screw conveyors 2 can be two or more. With this screw conveyor 2, the auxiliary material that has dropped to the lower part of the charging port 1 is carried to the stirring chamber 3 described below.

As shown in FIG. 5, a stirring rotator 31 is arranged in the stirring chamber 3 to stir the auxiliary material carried by the screen conveyor 2. The stirring rotator 31 comprises a rotating shaft 32 and a plurality of stirring rods 33 mounted in the radial direction. The rotary shaft 32 is a double shaft having the rotary shaft 21 of the above-mentioned screw conveyor passed inside, and rotates at high speed. It is desirable that a large number of the stirring rods 33 are arranged on the base side near the charging port 1 and the number thereof is reduced on the tip side. Further, by providing a stirring rod 34 in the stirring chamber 3 in cooperation with the rotating stirring rod 33, more efficient stirring is expected.

A drop hole 35 for an auxiliary material is formed in the bottom of the tip of the stirring chamber 3, and a damper 36 for adjusting the size of the opening is arranged (see FIG. 6). The damper 36 is cut obliquely and is arranged so that the opening becomes larger toward the tip side of the stirring chamber 3.

As described above, in the agitating chamber 3, the auxiliary material carried by the screw conveyor 2 is well agitated by the agitating rods 33 and 34 and dropped into the pressure feeding chamber 4 through the drop hole 35. is there.

Next, the pumping chamber 4 is provided with a rotary weighing body 41 having a plurality of (in this embodiment, 7) blades 42 therein, and is rotationally moved in the direction of an arrow in FIG. . Then, the auxiliary material dropped from the drop hole 35 is carried downward by each blade 42. On the other hand, the tip of the air discharge pipe 44 of the fluid pressure generator 5 such as a blower faces the lower part of the pressure feed chamber 4, and the auxiliary material is pressure-fed by the high-pressure air and discharged from the discharge port 6.

As described above, the auxiliary material charged from the charging port 1 is stirred in the stirring chamber 3 and discharged from the discharge port 5 via the pressure feeding chamber 4. However, when the amount of the auxiliary material that is input from the input port 1 and is conveyed to the stirring chamber 3 exceeds the stirring processing amount in the stirring chamber 3, and a large amount of the auxiliary material accumulates in the stirring chamber, and its density becomes high. There is. In this case, it is of course impossible to perform good stirring, and the auxiliary material falling into the pressure feeding chamber 4 is in a compressed state, and more auxiliary material than the predetermined amount is discharged from the discharge port 6. However, it is not possible to stabilize the discharge amount.

In consideration of the above problems, in the present invention, as shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 8, the reverse screw conveyor 7 connecting the stirring chamber 3 and the charging port 1 is provided with , 3 are coordinated. This will be described in more detail with reference to FIG. 8 mainly. A relief hole 71 is formed near the upper end of the stirring chamber 3. This escape hole 71 is for letting excess auxiliary material escape to the reverse feeding screw chamber 72, and the reverse feeding screw conveyor 7 is for returning the escaped auxiliary material from the return port 73 to the charging port 1. . The reverse feeding screw conveyor 7 can be provided separately from other rotating bodies, but in this embodiment, the rotating shaft 91 of the rotating body 9 is provided with screw blades 74 in the opposite direction. Therefore, the number of rotating shafts is reduced. The auxiliary material returned to the charging port by the reverse feeding screw conveyor 7 is immediately dropped to the lower part of the charging port 1 by the blades 91 of the rotating body 9. This is to avoid the fact that if the returned auxiliary material such as mica hits the other rotating bodies 8 and 8 many times, the mica may be finely crushed, which is avoided. For the same purpose, it is desirable that the return port 73 is arranged below the other rotary bodies 8, 8.

Although not shown in the drawings, the screw conveyor and the rotating body are rotated by a suitable rotary drive source such as an electric motor via a transmission means such as a chain or a gear.

Next, another embodiment will be described with reference to FIGS. 9 and 10. In this embodiment, the inlet 101 is provided with an extension portion 101, and the inlet 1 is extended to a size close to the escape hole 71 that connects the stirring chamber and the reverse feeding screw chamber 72, and the opening is enlarged. is there. Therefore, only the base end of the reverse feeding screw 7 is arranged in the reverse feeding screw chamber 72, but the other portion is arranged at the bottom of the extension portion 101 of the charging port. Since the bottom slope 102 of the extension 101 of the charging port 1 is shallow, the rotary shaft 81 of the rotor 8 located above the extension 101 is not provided with the rod-shaped body 82. Of course, it is preferable to provide the rod-shaped body 82 also in the same portion, and screw blades may be provided instead of the rod-shaped body.

Although the screw conveyor 2 and the reverse screw conveyor 6 are used in the above-described embodiments, this may be changed to another conveyor or another transfer means such as a spring feeder. Further, as the reverse feeding means, the stirring chamber 3 and the charging port 1 are connected to each other through a relief hole without using a positive transfer means, and the pressure in the stirring chamber 3 or the natural dropping from the stirring chamber 3 to the charging port 1 is performed. Alternatively, the auxiliary material may be returned.

[0020]

[Effect of device]

 As described above, in the first invention of the present application, the operator only has to insert the auxiliary material such as mica into the input port, and the auxiliary material is transferred from the input port 1 to the stirring chamber 3 by the transfer means 2 and the pressure feeding chamber 4 is fed. It is possible to provide an auxiliary material supply device that is sent to the molten metal surface and is discharged from the discharge port 6 by the fluid pressure generating device 5 such as a blower. Moreover, it does not have a complicated structure, and the spraying work can be performed with a small device, which eliminates the need for the worker to approach the molten metal so much.

In the second invention of the present application, the following effects are further produced by providing the stirring chamber with the backward feeding means. The surplus auxiliary material in the stirring chamber is returned to the charging port and does not clog, so that the density of the auxiliary material in the stirring chamber is always kept good. Since the density inside the stirring chamber is kept good, it is possible to prevent the rotation torque of the stirring rotating body from increasing. Since the stirring is performed with a good density, the load applied to the stirring rotating body does not increase and the abrasion thereof does not become severe. Since the stirring is performed with a good density, the stirring amount becomes constant, the amount of the auxiliary material discharged becomes uniform, and it is easy to keep the amount of the auxiliary material sprayed on the surface of the molten metal constant.

[Brief description of drawings]

FIG. 1 is a front view layout diagram of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a front view of the embodiment.

FIG. 4 is a side view of the embodiment.

FIG. 5 is an enlarged view of the stirring chamber of the same embodiment.

FIG. 6 is an enlarged explanatory view of a drop hole of the stirring chamber of the embodiment.

FIG. 7 is an explanatory view seen from a side surface of the pumping chamber of the embodiment.

FIG. 8 is an explanatory view of the reverse feeding screw conveyor of the embodiment as seen from above.

FIG. 9 is a perspective view of a main part of another embodiment.

FIG. 10 is a left side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Input port 2 ... Screw conveyor 3 ... Stirring chamber 4 ... Pressure feeding chamber 5 ... Fluid pressure generator 6 ... Discharge port 7 ... Reverse feeding screw conveyor

Claims (2)

[Scope of utility model registration request] 1. In an auxiliary material supply device for spraying an auxiliary material such as mica on molten metal, an inlet for the auxiliary material such as mica (1)
A transfer means (2) arranged below the charging port, a stirring chamber (3) for stirring the auxiliary material carried by the transfer means, a pressure feeding chamber (4) connected to the stirring chamber, and a pressure feeding chamber. A device for supplying an auxiliary material to a molten metal, comprising: a fluid pressure generating device (5) such as a blower connected to a discharge port; and a discharge port (6) arranged in front of a pressure feeding chamber. 2. A back-feeding means (7) for returning the surplus auxiliary material accumulated in the stirring chamber (3) to the charging port is arranged between the stirring chamber (3) and the charging port (1). The apparatus for supplying an auxiliary material to molten metal according to claim 1, characterized in that.