KR102425361B1 - Molten metal injection device for metal melting furnace - Google Patents

Abstract

The present invention relates to a molten metal injection device for a metal melting furnace, and more specifically, to a molten metal injection device for a metal melting furnace, which comprises a bucket in which an inlet member and a discharge member are arranged. According to the present invention, a molten metal injection device can be provided which is capable of rapidly injecting molten metal made of pure metal except for dross to an induction heater.

Description

Molten metal injection device for metal melting furnace

The present invention relates to a molten metal injection device for a metal melting furnace, and more particularly, to a molten metal injection device for a metal melting furnace including a bucket in which an inlet member and a discharge member are disposed.

A metal melting furnace is a kiln that melts metal into a liquid state. Melting furnaces are broadly classified into molten iron furnaces, reflective furnaces, crucible furnaces, and electric furnaces according to the method. Among them, an electric furnace is a melting furnace that melts metal using electric energy. Among the electric furnaces, there are a resistance furnace using electric resistance heat, an arc furnace using high heat generated by an arc, an induction furnace heating a vessel by inducing an electric current, and the like. In an induction furnace type metal melting furnace, an induction heater is disposed in a vessel.

When the metal is melted and made into a liquid state in an induction furnace type metal melting furnace, first, a metal ingot is melted inside a container, and the molten metal is injected into the induction heater side.

On the surface layer of the molten metal, dross formed by agglomeration in the form of oxide is formed. If dross is injected into the induction heater, the induction heater may be blocked, so it is very important to inject the molten metal made of pure metal except for the dross into the induction heater. However, in the conventional case, since the molten metal was poured into a bucket similar to a basket and injected into the induction heater, it was very difficult to inject the molten metal made of pure metal excluding dross to the induction heater. .

In addition, the molten metal may be solidified by the temperature difference when it is injected into the induction heater side. Therefore, it is very important that the process of injecting the molten metal into the induction heater is done quickly. However, when molten metal is injected using the same bucket as in the prior art, there is a problem that the process takes a long time.

In addition, in the conventional case, using a jig or the like, there was a problem that the worker wearing a protective suit had to move or tilt the bucket one by one while exposed to molten metal, so there was a problem of being vulnerable to a safety accident.

Japanese Patent 06378617 Chinese registered patent 210280652

Based on the technical background as described above, the present invention is a molten metal injection device capable of rapidly injecting molten metal made of pure metal excluding dross into the induction heater side in a metal melting furnace including an induction heater. provides

The molten metal injection device according to an embodiment of the present invention is a molten metal injection device for a metal melting furnace for injecting molten metal into the induction heater in the inside of the metal melting furnace in which at least one induction heater is disposed, It includes a bucket, an inlet member, a discharge member, and a driving device. The bucket has an accommodating space for accommodating the molten metal therein. The inlet member is disposed at the lower portion of the bucket and an opening hole is formed so that the molten metal is introduced. The discharge member is disposed on the side of the bucket, communicates with the receiving space, and includes an inlet/outlet. The driving device moves and rotates the bucket, and adjusts the inclination of the bucket.

In addition, the driving device is coupled with a hook hook for hanging and supporting the wire wire connected to one side and the other side of the bucket, and winding or unwinding one or the other side of the crane wire that moves the hook up, down, left and right to adjust the inclination of the bucket. and a device for controlling the motion of the device.

In addition, it may further include a rotating device for rotating the bucket about the vertical axis of rotation.

In addition, a coating layer is formed on the surface of the bucket, and the coating layer is Zn, Al, Mg, Mn, C, Fe, Sn, Ti, Cu, W, Mo, Zr, STS-based, Inconnel-based, Ceramic-based, Cr-based , Ni-based, Co-based, and may be made of a composition comprising at least one component of WC-based.

Also, the upper end of the inlet of the discharging member may be disposed at a height lower than the upper end of the bucket.

In addition, on the upper side of the bucket, a cover member to cover the receiving space to minimize the inflow of external air into the receiving space may be further disposed.

In addition, the inflow member may include an opening and closing member that opens the opening hole when the molten metal flows into the receiving space, and closes the opening hole so that the molten metal introduced into the receiving space does not flow out when the bucket rises. have.

In addition, the opening/closing member may have one end hinge-coupled to the lower portion of the bucket and the inside of the bucket, and the other end may be rotatably disposed inside the bucket.

Also, the lower end of the outlet of the discharging member may be disposed at a height not lower than the uppermost end of the bucket.

In addition, the metal melting furnace includes a plurality of induction heaters, the discharge members are provided in a number corresponding to the number of induction heaters, and the plurality of discharge members are located at positions corresponding to the induction heaters on the side of the bucket, respectively. can be placed.

The molten metal injection device according to the present invention includes a bucket in which an inflow member through which molten metal is introduced and a discharge member for discharging the molten metal is disposed, and quickly transfers molten metal made of pure metal excluding dross toward the induction heater. It has the effect of being able to inject.

1 is a conceptual diagram showing the overall appearance of a molten metal injection apparatus according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram illustrating a state in which the molten metal is being injected from the bucket toward the induction heater in FIG. 1 .
3 is a conceptual diagram showing a molten metal injection device including a rotating device in the driving device.
4 is an enlarged perspective view of the bucket assembly.
5 is a perspective view showing that the opening and closing member is disposed on the inlet member.
6 is a side cross-sectional view showing a state in which the outlet of the discharging member is disposed not lower than the upper end of the bucket.
7 is a perspective view illustrating a bucket in which a plurality of discharging members are disposed.
8 is a conceptual diagram illustrating a process in which a metal ingot is melted and filled to a working level in a metal melting furnace.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present invention, terms such as 'comprising' or 'having' are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that in the accompanying drawings, the same components are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, a molten metal injection apparatus according to an embodiment of the present invention will be described in detail.

1 is a conceptual diagram showing the overall appearance of a molten metal injection apparatus according to an embodiment of the present invention, FIG. 2 is a conceptual diagram showing a state in which molten metal is injected from the bucket to the induction heater side in FIG. 1, FIG. 3 is It is a conceptual diagram showing a molten metal injection device including a rotating device in the driving device.

Hereinafter, the overall configuration of the molten metal injection apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3 . The molten metal injection device includes a bucket assembly 200 and a driving device 300 .

The metal melting furnace 100 in which the molten metal injection device is used includes a shell 110 , a heat insulating member 120 , a fire resistant member 130 , and an opening member 140 . The shell 110 is disposed to surround the outside of the metal melting furnace 100 . A heat insulating member 120 may be disposed inside the shell 110 , and a fire resistant member 130 may be disposed inside the heat insulating member 120 . In addition, at least one opening member 140 is disposed on the side of the metal melting furnace 100 . The opening material 140 has an opening hole (not shown) formed therein, and an induction heater H is disposed therein. The induction heater (H) is a device for heating a metal by inducing an electric current.

The metal melting furnace 100 is formed with an internal space (S) in which the molten metal (M) is accommodated. The molten metal M has a surface that is lower than the opening hole (not shown) of the opening material 140 in the inner space S. And, dross (D) which is an oxide is formed on the surface of the molten metal (M).

The bucket assembly 200 includes a bucket 210 , an inlet member 220 , and a discharge member 230 . The bucket 210 is configured to contain the molten metal (M). The bucket 210 may be manufactured in the form of a substantially basket-like shape.

The inlet member 220 is disposed below the bucket 210 . When the bucket 210 is placed on the surface of the molten metal M, the bucket 210 sinks into the molten metal M while the molten metal M is introduced into the inlet member 220 . At this time, as the bucket 210 sinks further lower than the surface of the molten metal M, only pure metal excluding the dross D on the surface may be introduced into the inside of the bucket 210 .

A discharge member 230 is disposed in the bucket 210 . The discharge member 230 flows into the inside of the bucket 210 and discharges the temporarily stored molten metal M to the outside.

The driving device 300 may move and rotate the bucket 210 and adjust the inclination of the bucket 210 . The driving device 300 may include a wire 310 , a hook 320 , a crane 330 , a wheel 340 , and a wheel control device 350 .

The wire 310 may be respectively connected to one side and the other side of the bucket 210 . For example, the wire 310 may be connected to the discharging member 230 side of the bucket 210 and the opposite side of the discharging member 230 , respectively. At this time, when pulling or loosening one side or the other side of the wire 310, the inclination of the bucket 210 may be adjusted.

The hook 320 is configured to support the wire 310 by hanging the wire 310 . A crane 330 may be provided outside the metal melting furnace 100 , and the hook 320 may be coupled to the crane 330 . The crane 330 may move the hook 320 up, down, left and right, and in some cases, the hook 320 may be rotated. As the hook 320 is moved by the crane 330 , the wire 310 connected to the hook 320 may also be moved, and as the wire 310 moves, the bucket 210 may be moved.

A circle 340 is disposed on the wire 310 . The circle 340 is a device for winding or unwinding the wire 310 . The circle 340 may wind or unwind one side or the other side of the wire 310 . In addition, the unwanted control device 350 may be disposed outside the metal melting furnace 100 . The wand control device 350 is a device that controls the operation of the wand 340 . The desired control device 350 may be controlled manually or automatically. Accordingly, the inclination of the bucket 210 may be adjusted by the circle 340 and the circle control device 350 .

The driving device 300 may further include a rotating device 360 . The rotating device 360 includes an upper body 361 and a lower body 362 . The upper body 361 may be supported by being caught on the hook 320 coupled to the crane 330 . The lower body 362 is disposed below the upper body 361 . A wire 310 is hung and supported on the lower body 362 . The upper body 361 and the lower body 362 are arranged to be rotatable relative to each other, and the axis of rotation may be formed around a vertical direction. A driving motor (not shown) or the like may be disposed on the upper body 361 or the lower body 362 . As the lower body 362 rotates in the upper body 361 , the wire 310 and the bucket 210 coupled to the wire 310 may rotate.

When the plurality of opening materials 140 and the induction heater H are disposed in the metal melting furnace 100 , the molten metal M is injected into one of the opening materials 140 , and then the other opening materials 140 . ) should be injected with molten metal (M). At this time, when the injection of the molten metal M into one of the opening members 140 is completed, the bucket 210 and the discharging member 230 are rotated toward the other opening member 140, the other opening member 140 It is possible to easily inject the molten metal (M) into the

Figure 4 is an enlarged perspective view of the bucket assembly, Figure 5 is a perspective view showing that the opening and closing member is disposed on the inlet member, Figure 6 is a side cross-sectional view showing the state that the outlet of the discharge member is disposed not lower than the upper end of the bucket , FIG. 7 is a perspective view showing a bucket in which a plurality of discharging members are disposed.

As shown in FIG. 4 , the bucket 210 includes a bucket lower portion 211 and a bucket side portion 212 surrounding the bucket lower portion 211 with the upper portion open. The bucket lower portion 211 and the bucket side portion 212 form an accommodation space 213 for accommodating the molten metal (M).

The bucket 210 may be made of a steel sheet such as a hot rolled steel sheet, a cold rolled steel sheet, and a plated steel sheet to have high durability while enduring high heat for a long time. Steel sheet is C 0.002 to 0.300 wt%, Si 0.02 to 1.00 wt%, Mn 0.1 to 2.0 wt%, P 0.008 to 0.060 wt%, S 0.01 to 0.03 wt%, Cr 11.0 to 26.0 wt%, Ni 6.0 to 22.0 wt% , Mo 0.75 to 3.0% by weight, Sol-Al 0.008 to 0.060% by weight, N 0.002 to 0.030% by weight, Ti 0.01 to 0.5% by weight, and Fe may be formed in a composition containing.

A coating layer may be formed on the surface of the bucket 210 . The coating layer may protect the bucket 210 from high heat and prevent the molten metal M from sticking to the surface of the bucket 210 . For this, the coating layer is selected from among Zn, Al, Mg, Mn, C, Fe, Sn, Ti, Cu, W, Mo, Zr, STS-based, Inconnel-based, Ceramic-based, Cr-based, Ni-based, Co-based and WC-based. It may consist of a composition comprising at least one component.

Zn is to prevent corrosion by the sacrificial method, Al is to improve electrical and thermal conductivity, and to prevent corrosion by the sacrificial method, and Mg is higher than Zn to prevent corrosion by the sacrificial method Mn acts as an evaporation barrier for alloying elements, C improves wear, adhesion, erosion, impact, and surface hardness, Fe improves oxidation and erosion resistance, Sn increases high-speed friction stability and surface texture density, , Ti improves lubricity, toughness, corrosion resistance, Cu increases electrical and thermal conductivity, W improves corrosion, wear resistance and cavitation resistance, Mo has wear, resistance and low coefficient of friction, Zr is thermal It acts as a barrier, abrasive, wetting, and corrosion resistance of molten metal. The STS system has high strength and excellent corrosion and oxidation resistance, the Inconnel system is for controlling the thermal expansion characteristics between the base material and the coating layer, and the Ceramic system is thermal or electrical insulation, It is for abrasion, corrosion resistance, Cr-based to improve solid particle erosion, abrasion, friction corrosion prevention and cavitation resistance, Ni-based to enhance erosion resistance, Co-based for anti-oxidation and corrosion resistance, WC-based for anti-slip , to improve resistance to impact, abrasion, and brittle corrosion.

The inlet member 220 is disposed in the lower bucket 211 . The inflow member 220 may be configured as an opening hole 221 . The opening hole 221 may be formed to communicate with the outside of the bucket 210 and the lower part of the bucket 211 to communicate with the receiving space 213 .

A discharge member 230 is disposed on the bucket side portion 212 . The discharge member 230 includes a discharge pipe 231 . The discharge pipe 231 includes an inlet 232 communicating with the accommodation space 213 and an outlet 233 communicating with the outside of the bucket 210 . The flow amount of the molten metal M discharged to the outlet 233 of the discharge member 230 should be less than the flow amount of the molten metal M introduced through the opening hole 221 . Accordingly, it is preferable that the cross-sectional area of the outlet 233 of the discharge member 230 is smaller than the cross-sectional area of the opening hole 221 . In addition, the cross-sectional area of the outlet 233 and the opening hole 221 of the discharging member 230 may be determined according to the density of the molten metal M and the height difference between the outlet 233 and the opening hole 221 of the discharging member 230. can

The upper end of the inlet 232 of the discharge member 230 may be disposed at a lower height than the upper end of the bucket 210 . If not, the molten metal M may be filled to an excessively high height when the molten metal M is filled in the receiving space 213, and in this case, the molten metal M may overflow from the bucket 210. Because.

In addition, a cover member 240 disposed to cover the accommodation space 213 may be further disposed above the bucket 210 . Since the cover member 240 can cover the accommodation space 213 , it is possible to prevent the molten metal M from overflowing to the top of the bucket 210 . In addition, since the cover member 240 blocks the outside of the accommodation space 213 and the bucket 210 , it is possible to prevent external air from flowing into the accommodation space 213 . Even if the molten metal M in a pure state is introduced into the receiving space 213 through the inlet member 220 , dross D may occur due to external air, and the cover member 240 blocks the outside air. Thus, there is an advantage that it is possible to minimize the dross (D) that may occur in the molten metal (M) inside the receiving space (213).

5 , the inflow member 220 disposed in the bucket 210 may further include an opening/closing member 222 . The opening/closing member 222 opens the opening hole 221 when the molten metal M is introduced through the inflow member 220, and closes the opening hole 221 when the bucket 210 is lifted and ascended. to be. Therefore, when the bucket 210 sinks, the opening hole 221 is opened to facilitate the inflow of the molten metal M, and when the bucket 210 is lifted, the molten metal M passes through the opening hole 221 . Because it does not flow through, it is convenient to accommodate the molten metal (M).

Specifically, the opening/closing member 222 may have a hinge structure. One end of the opening/closing member 222 may be hinged in the lower bucket 211 and the inner accommodation space 213 of the bucket 210 . In this case, the opening and closing member 222 may be hinged around the opening hole 221 to cover the opening hole 221 . In addition, the other end of the opening and closing member 222 may be rotatably disposed about the hinge axis in the inner side of the bucket 210 and the receiving space 213 . In this case, when the bucket 210 sinks in the molten metal M, the opening and closing member 222 rotates toward the receiving space 213 to open the opening hole 221 , and when the bucket 210 is lifted, The opening/closing member 222 may rotate to close the opening hole 221 .

As shown in FIG. 6 , the outlet 233 of the discharging member 230 may be disposed at a height where the lower end of the outlet 233 is not lower than the uppermost end of the bucket 210 . That is, the lower end of the outlet 233 of the discharging member 230 may be at the same height as the uppermost end of the bucket 210 , or may be disposed at a height higher than the uppermost end of the bucket 210 . In this case, even if the molten metal M is filled from the receiving space 213 to the uppermost end of the bucket 210 , the molten metal M is not discharged to the discharging member 230 , so that the receiving space 213 at a time. There is an effect that it is possible to maximize the amount of molten metal (M) that can be accommodated.

In addition, when the molten metal M is injected into the opening member 140 , the injection may be made in a state in which the outlet 233 of the discharge member 230 is inserted into the opening member 140 . In this case, the bucket Since the outlet 233 of the discharge member 230 can be inserted into the opening material 140 even if the 210 is slightly lifted, the molten metal M can be more rapidly injected into the opening material 140 . There is this.

As shown in FIG. 7 , a plurality of discharge members 230 disposed in the bucket 210 may be provided. Specifically, the metal melting furnace 100 includes a plurality of induction heaters (H) and an opening material 140 corresponding thereto, and the discharge member 230 includes the induction heater (H) and the opening material 140 . It may be provided in a number corresponding to the number. In addition, the discharge members 230 may be respectively disposed at positions corresponding to the opening members 140 in the bucket 210 . For example, when the opening material 140 is disposed on both sides of the metal melting furnace 100 in the metal melting furnace 100, two discharge members 230 are provided to be disposed on both sides of the bucket 210, respectively. can Contrary to this, when the metal melting furnace 100 is manufactured in the shape of a square pillar and the opening member 140 is disposed on each of the slopes, four discharge members 230 are provided and disposed on the slopes of the bucket 210, respectively. can be

When a plurality of induction heaters H and an opening member 140 are disposed in the metal melting furnace 100 and only one discharge member 230 is provided in the bucket 210, the After the molten metal (M) is injected, the bucket 210 is rotated to inject the molten metal (M) into the other opening material 140 . However, as above, when a plurality of discharging members 230 are provided, the operation can be made much simpler and faster because only the movement and inclination of the bucket 210 need to be adjusted without rotating the bucket 210 . .

8 is a conceptual diagram illustrating a process in which a metal ingot is melted and filled to a working level in a metal melting furnace.

Hereinafter, with reference to FIG. 8 , using the molten metal injection device according to another embodiment of the present invention, the molten metal M is injected into the opening material 140 , and the molten metal M is transferred to the metal melting furnace 100 . ), the process of filling the inner space (S) is examined.

First, a metal ingot (I) is put into the inside of the metal melting furnace 100 . Then, the metal ingot (I) is heated and melted by a separate heating source such as a burner. If the above process is repeated, the molten metal M is filled up to the height of the entrance of the opening hole (not shown) of the opening material 140 . At this time, the molten metal M in a pure state is injected into each opening member 140 using the bucket assembly 200 . When the molten metal (M) is filled in the opening material (140), the molten metal (M) is further heated by the induction heater (H). In this state, more metal ingot (I) is melted in the inner space (S) of the metal melting furnace (100), and the molten metal (M) of the inner space (S) is the molten metal (M) of the opening material (140). ) and (Fig. 8(a)).

After that, a separate heating source such as a burner for heating the metal ingot I in the inner space S stops the heat supply. Instead, from this point on, the molten metal (M) is supplied with heat only from the induction heater (H). The molten metal (M) is heated from the induction heater (H), and the molten metal (M) heated from the induction heater (H) exits the opening material 140 by convection and the It circulates into the inner space (S). At the same time, the molten metal M of the inner space S circulates toward the induction heater H to receive heat. Therefore, as above, the molten metal (M) is supplied with heat from the induction heater (H) and circulated while the molten metal (M) is heated as a whole in the internal space (S) and the opening material (140) of the metal melting furnace (100). will become If the metal ingot (I) is continuously added to the inner space (S) of the metal melting furnace (100) during the above process, the surface of the molten metal (M) rises to the working level (L), whereby the melting of the metal The operation is completed (FIG. 8(b)).

In the above, although an embodiment of the present invention has been described, those of ordinary skill in the art can add, change, delete or add components within the scope that does not depart from the spirit of the present invention described in the claims. It will be possible to variously modify and change the present invention by, etc., such modifications and changes will also be included within the scope of the present invention.

100: metal melting furnace
110: iron shell
120: insulation member
130: fire resistant member
140: opening material
200: bucket assembly
210: bucket
211: lower bucket
212: bucket side
213: accommodation space
220: inflow member
221: opening hole
222: opening and closing member
230: discharge member
231: discharge pipe
232 : entrance
233: exit
240: cover member
300: driving device
310: wire
320: hook
330: crane
340: want
350: original control device
360: rotation device
361: upper body
362: lower body
S: interior space
I : Metal ingot
M: Molten metal
D: dross
H: induction heater
L: work level

Claims (10)

A molten metal injection device for a metal melting furnace for injecting molten metal into an induction heater in the inside of the metal melting furnace in which at least one induction heater is disposed,
a bucket having an accommodating space for accommodating the molten metal therein;
an inlet member disposed under the bucket and having an opening hole through which the molten metal flows;
a discharge member disposed on the side of the bucket, communicating with the receiving space, and including an inlet/outlet; and
and a driving device for moving and rotating the bucket and adjusting the inclination of the bucket,
the opening hole
In the lower part of the bucket, it is formed to communicate with the outside of the bucket and the accommodation space,
The discharge member is
A molten metal injection device configured to be moved and rotated by the driving device to directly discharge the molten metal to the induction heater. According to claim 1,
The driving device is
a wire connected to one side and the other side of the bucket;
a hook for hanging and supporting the wire;
a crane coupled to the hook and moving the hook up, down, left and right;
a wish to adjust the inclination of the bucket by winding or unwinding one side or the other side of the wire; and
Molten metal injection apparatus including a circle control device for controlling the operation of the circle. According to claim 1,
Molten metal injection device further comprising a rotation device for rotating the bucket about the vertical axis of rotation. According to claim 1,
A coating layer is formed on the surface of the bucket,
The coating layer is
Zn, Al, Mg, Mn, C, Fe, Sn, Ti, Cu, W, Mo, Zr, STS-based, Inconnel-based, Ceramic-based, Cr-based, Ni-based, Co-based and WC-based at least one component Molten metal injection device made of a composition containing. According to claim 1,
The upper end of the inlet of the discharge member,
Molten metal injection device disposed at a height lower than the top of the bucket. The method of claim 1
On the upper side of the bucket,
A molten metal injection device further comprising a cover member covering the receiving space to minimize external air from flowing into the receiving space. According to claim 1,
The inlet member is
When the molten metal flows into the accommodating space, it opens the opening hole, and when the bucket rises, the opening and closing member closes the opening hole so that the molten metal introduced into the accommodating space does not flow out to the outside. Molten metal injection device. delete According to claim 1,
The lower end of the outlet of the discharge member,
Molten metal injection device disposed at a height not lower than the top of the bucket. According to claim 1,
The metal melting furnace includes a plurality of induction heaters,
The discharge member,
It is provided with a number corresponding to the number of induction heaters,
The plurality of discharging members are molten metal injection device respectively disposed at positions corresponding to the induction heater on the side of the bucket.

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