KR100685043B1 - Device for treatmenting aattached hot steel on roof of electric furnace - Google Patents

Abstract

An equipment for removing metal attached onto the roof of an electric furnace is provided to recover chromium(III) oxide(Cr2O3) and metal droplet, reduce the generation of waste and prevent environmental pollution by recovering and pulverizing metal dropped onto an upper part of a deck, melting the pulverized metal in the electric furnace, and injecting molten metal into a ladle during the tapping operation. An equipment(100) for removing metal attached onto the roof of an electric furnace comprises: a hopper(110) for storing metal separated and dropped from the roof; a cooling water supply part for supplying cooling water into the hopper to facilitate pulverization of the metal by inducing hydration reaction of the metal stored in the hopper; a transfer part(130) for discharging and transferring the metal pulverized in the hopper by having a transfer motor(135) for rotating a transfer screw(133) formed in a transfer pipe(131) of the hopper; and a discharge part(140) comprising a guide hopper(141) into which pulverized metal discharged from the transfer pipe is dopped and guided, and a chute(145) with a predetermined length that extends from a lower part of the guide hopper so as to discharge metal into a ladle.

Description

Device for Treatmenting Aattached Hot Steel on Roof of Electric Furnace}

1 is a perspective view showing a state in which now occurs in a typical electric furnace equipment.

2 is a block diagram showing a conventional apparatus for treating a large ceiling now.

3 is a perspective view of a large ceiling now processing apparatus for an electric furnace according to the present invention.

4 is a perspective view showing a hopper provided in the large ceiling now processing apparatus for an electric furnace according to the present invention.

Figure 5 is a block diagram showing a hopper and a cooling water supply line provided in the large ceiling now processing apparatus for an electric furnace according to the present invention.

6 (a) and 6 (b) are diagrams illustrating the configuration between the guide hopper and the swing motor provided in the large ceiling now processing apparatus of the electric furnace according to the present invention.

7 is a state diagram accumulated in the hopper of the large ceiling now processing apparatus for an electric furnace according to the present invention.

Fig. 8 is a front view of the now discharged from the chute of the large ceiling now processing device of the electric furnace according to the present invention into the water ladle.

9 is a perspective view of the discharge from the chute of the large ceiling now processing apparatus according to the present invention into the water ladle.

Explanation of symbols on the main parts of the drawings

2: electric furnace 3: large ceiling

5: Course Ladle 9: Work Deck

110: hopper 113: outlet

115a, 115b 120: cooling water supply unit

121: injection nozzle 125: cooling water line

130: transfer unit 131: transfer pipe

133: transfer screw 135: transfer motor

140: discharge part 141: guide hopper

145: chute 150: swing operation

151 support member 152 holder

154: rotary gear 56: swing motor

The present invention relates to a device for treating the now falling off from the large ceiling of the electric furnace, more specifically to the dropping to the top of the deck due to the impact generated during the turning of the large ceiling for loading the raw material into the electric furnace and the current self-weight It is recovered without disposing and then differentiated and at the same time, after the completion of melting with electricity, it is put into the tapping ladle during the tapping operation to recover chromium oxide (Cr ₂ O ₃ ) and metal dropnet, and to generate waste. The present invention relates to an electric furnace large ceiling now treatment apparatus that can reduce and prevent environmental pollution.

In general, an electric furnace refers to a furnace for heating and dissolving a metal or an alloy by using electrical energy, and as shown in FIG. 1, a plurality of vertically connected to a large ceiling 3 covering an upper portion of the electric furnace 2. Two electrodes 4, and when a high voltage is applied to the electrodes 4, high heat arc heat is generated to dissolve the scrap metal in the electric furnace 2.

Then, the molten steel in which the scrap metal is dissolved is moved to the tapping ladles 5 through the tapping hole 2a and filled, and the tapping ladles 5 filled with the molten steel are transported so as to be able to run in the no-pit 8. By being put on the trolley | bogie 7, it moves to another process.

On the other hand, a split now (hereinafter referred to as now) generated when the scrap metal is melted in the electric furnace 2 is attached to the lower surface of the large ceiling 3 for charging raw materials into the electric furnace 2. The large ceiling (3) is rotated by a rotating means not shown to open the upper portion of the electric furnace (2).

At this time, a phenomenon in which the now formed on the large ceiling (3) is dropped to the lower by the impact applied to the large ceiling (3) or the current self-weight attached to the lower surface of the large ceiling (3) occurs.

Due to this, the deck dropping gold (A) is formed on the work deck (9) provided on the underfloor wall (6) by dropping and accumulating. The deck freezing gold must be collected by a worker in a closed space and a high temperature place. Therefore, the collection and processing work is dangerous, and troublesome problems have occurred.

Then, on the bottom surface of the no pit 8 is formed a fall fall gold (B) by the now accumulated and accumulated fall, and by this fall fall gold fall on the rail and the bottom of the transport cart (7) Since it interferes with the normal use of (7), a problem arises that it takes a lot of time and effort to regularly process the fallout deposit.

In addition, when dropped to the no-fit (8) now reaches the storage limit of the no-fit, it requires a lot of effort to remove from the no-fit (8) using a separate drilling equipment, and dust generated during no-pit excavation There was a problem causing environmental pollution.

In particular, now attached to the large ceiling (3) does not fall to the no-fit (8) when rotating the large ceiling, but instead of the falling of the raw material when charging the raw material into the electric furnace (2) at the completion of the rotation of the large ceiling (3) Due to the impact caused by the fall caused by the impact to increase the equipment accidents, thereby lowering the operation rate of the facility, it acted as a major cause of lowering the productivity.

Accordingly, in order to solve such a problem, Korean Patent Laid-Open Publication No. 2002-52104 (published on Jul. 02, 2002) effectively prevents the accumulation of dust and sludge of the no-pit by discharging the now dropped from the Daecheon ceiling. In addition to securing a storage space, the treatment device 20 was installed above the Daecheon work deck 72 to fundamentally solve environmental pollution.

The conventional apparatus 20 includes a hopper 21 for collecting currents falling from the large ceiling 3, a grating plate installed at the lower side of the hopper, a crushing needle protruding upwardly, and the hopper 21. A grinding processing unit including a pair of grinding rolls installed in the base frame 22 connected to a lower part of the base frame 22 to be crushed to fall through the lattice plate, and a driving motor for rotating the grinding wheel; 22) a conveying pipe 23 installed on the inner bottom surface, a conveying screw for conveying the pulverizing grain which is provided therein and passing through the crushing roll, and a driving motor installed at the front end of the base frame and connected to the conveying screw rotation shaft ( 24 and an electric discharge pipe 25 connected to the discharge port of the transfer pipe 23 and extending to a lower facility, and a dust box 26 containing the grinding now discharged through the discharge pipe 25 is provided. The present invention provides an apparatus for processing the now falling from the large ceiling.

However, such a conventional apparatus 20 needs a means for moving the dust discharged in the dust box 26 to a separate by-product treatment facility and a separate treatment process in the by-product treatment facility.

In addition, at the time of falling from the ceiling (3), at least 9 to 13.5 wt% of chromium oxide (Cr2O3), which is very harmful to the environment, and at the same time contains a large amount of recyclable metal residue, which is treated in a byproduct treatment facility It is not a desirable way of working in terms of environmental and production costs.

Therefore, the present invention is to solve the conventional problems as described above, its purpose is not to discard the now dropping to the top of the deck due to the impact generated during the turning of the ceiling for the raw material into the electric furnace and the current self-weight. It is possible to recover the chromium oxide and metal dropnet by tapping into the tapping work after tapping into the tapping ladle after the completion of melting with electric furnace. It is possible to provide an apparatus for treating a large ceiling now in an electric furnace that can secure a storage space of dust and sludge of a know-fit.

In order to achieve the above object, the present invention is a device that covers the upper part of the electric furnace, and recovers and processes the now attached to the lower surface of the large ceiling that is rotated at the time of loading the raw material, the now falling off from the large ceiling The hopper is stored; Cooling water supply unit for supplying the cooling water into the hopper to cause the current hydration reaction stored in the hopper to promote differentiation; A transfer unit having a transfer motor for rotating a transfer screw provided in the transfer pipe of the hopper to discharge and discharge the now differentiated in the hopper; And a discharge part for discharging the current into the water ladle having a guide hopper in which the eruption spout discharged from the transfer pipe is guided to fall, and a chute of a predetermined length extending from the lower portion of the guide hopper. It provides a treatment apparatus for the ceiling in the electric furnace now comprising a.

Preferably, the hopper is provided on the work technology to complete the rotation of the ceiling, form a box on the top of the open rectangular, and the discharge port discharged accumulated in the center of the lower surface, and gradually accumulate the dropped drop A pair of right and left induction plates are arranged to be inclined in the accommodating box so as to be made.

Preferably, the cooling water supply unit is a cooling water supply line for supplying the cooling water to the cooling water supply pipe having a plurality of injection nozzles that are externally exposed on the upper surface of the now induction plate, and a plurality of cooling water supply pipes disposed below the now induction plate. It is configured to include.

Preferably, the upper portion of the guide hopper further comprises a pivoting operation for pivoting the guide hopper, the pivoting operation is fixed to a plurality of support members extending from the upper inner circumferential surface of the guide hopper, and the upper end of the holder And a rotating gear rotatably assembled to the assembled and horizontal fixed base, and a turning motor having a driving gear engaged with the rotating gear at the tip of the drive shaft.

Preferably, the upper portion of the guide hopper is provided with a protective cover to prevent the now dropped from the large ceiling is introduced into the guide hopper.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a perspective view of a large ceiling now processing apparatus of the electric furnace according to the present invention, Figure 4 is a perspective view showing a hopper provided in the large ceiling now processing apparatus of the electric furnace according to the present invention, Figure 5 is an electric furnace according to the present invention Fig. 6 (a) (b) is a guide hopper and a swing motor provided in a large ceiling now processing apparatus of an electric furnace according to the present invention. It is a block diagram which shows the liver.

The apparatus 100 of the present invention is attached to the lower surface of the large ceiling (3) covering the upper portion of the electric furnace (2) during melting, as shown in Figures 3 to 6 (a) (b), when the raw material loading It is possible to recover the now falling off from the lower surface of the large ceiling (3), which is separated from the upper part of the electric furnace (2) and rotated, and the recovered now can be differentiated by the hydration reaction and then charged into the water ladle (5). It is configured to include a hopper 110, the cooling water supply unit 120, the transfer unit 130 and the discharge unit 140.

3 to 5, the hopper 110 is dropped by the external impact or self-weight from the lower surface of the large ceiling (2) rotated in one direction so as to open the upper portion of the electric furnace (2) when the raw material is loaded. It is a receptor with a certain size of internal space so that it can store the now falling.

This hopper 110 is provided on the work technology (9) where the rotation of the large ceiling (3) is completed, the upper box is opened on the receiving box 111 on the rectangular parallelepiped, and now accumulated in the center of the lower surface is discharged The discharge port 113 is formed, and the left and right pairs of induction plates 115a and 115b are disposed to be inclined in the accommodating box 111 so as to gradually accumulate the dropped drops.

Accordingly, it is rotated when the raw material is loaded into the electric furnace 2, and is now provided on the work technique 9, which is removed from the lower surface of the large ceiling 3 where the rotation is completed on the work technique 9. Falling into the receiving box 111, which is now dropped into the receiving box 111 is gradually accumulated while moving by the lower weight along the inclined surface of the now induction plate (115a) (115b), the now induction plate It gradually accumulates from the lower discharge port 113, which is the lowest position of the (115a) (115b) to fill the inside of the receiving box (111).

In addition, the cooling water supply unit 120, as shown in Figures 3 to 5, a predetermined amount into the hopper 110 to promote the differentiation of the current by the hydration reaction between the water and the water stored in the hopper 110. It is to supply water.

The cooling water supply unit 120 includes a cooling water supply pipe 123 having a plurality of injection nozzles 121 exposed to the upper surface of the now induction plates 115a and 115b, and the now induction plates 115a and 115b. It is configured to include a cooling water supply line 125 for supplying the cooling water to the plurality of cooling water supply pipe 123 disposed in the lower portion.

Here, the cooling water supply pipe 123 is a plurality of pipe members arranged in parallel with a predetermined interval in the lower portion of the now induction plate (115a) (115b).

The cooling water supply line 125 preferably includes a solenoid valve 126 for controlling a supply flow of the cooling water supplied to the cooling water supply pipe 123 and a flow meter 127 for detecting the supply amount.

Accordingly, the quicklime (CaO) component now contained in the hopper 110 by the hydration reaction with the cooling water sprayed through the injection nozzle 121 promotes differentiation into Ca (OH) ₂ component. Now, the differentiation is transferred to the discharge unit 140 by the transfer unit 130.

3 to 5, as shown in Figures 3 to 5, and discharged the transfer of the differentiated in the hopper 110, which is between the now induction plate (115a) (115b) of the hopper (110) The transfer pipe 131 is disposed to correspond to the discharge port 113 formed, and the driving source to rotate in one direction the transfer screw 133 and the transfer screw 133 rotatably provided in the transfer pipe 131 The feed motor 135 is provided and configured.

Here, the outer surface of the transfer pipe 131 corresponding to the discharge port 113 is formed in the opening so that the differentiated now flows into the tube, the end of the transfer pipe 131 is not equipped with the transfer motor 135 The part is hermetically sealed, and at one end of the hermetic conveying pipe 131, the present discharge port 137 is formed to be discharged to the lower part of the now forced by the rotation driving force of the conveying screw 133.

Accordingly, the differentiation in the hopper 110, the differentiation is promoted by the hydration reaction by the coolant now flows into the transfer pipe 131 of the transfer unit 130 through the discharge port 113, and then the transfer By using the transfer screw 133 is rotated by the drive source of the motor 135 for the external discharge through the now discharge port 137 of the transfer pipe 131.

3 and 6 (a) (b), the discharge portion 140 is after the differentiation process in the hopper 110, and then dropping the differentiation now falling by the transfer unit (130) 5) is configured to include a guide hopper 141 and the chute 145 to be collected into.

The guide hopper 141 is disposed directly below the now discharge port 137 of the transfer pipe 131 is temporarily opened so that the eruption now falling from the now discharge port 137 can be temporarily stored and guided safely to the bottom And it is a receiving member consisting of a cross-sectional shape that narrows the inner diameter toward the bottom.

The chute 145 is a top end is assembled to the lower end of the guide hopper 141, is provided with a predetermined length hollow pipe member extending inclined outwardly, the discharge end of the chute 145 is a water-tight opening It is positioned directly above the ladle 5.

Accordingly, the differentiation which has fallen into the guide hopper 141 is temporarily stored in the guide hopper 141 and then dropped into the inside of the receiving ladle 5 through the discharge end, which is the lower end of the chute 145. Will be.

In addition, a guide hopper may be disposed directly on the guide hopper 141 so that the discharge end of the chute 145 may be positioned above the water receiving ladle 5, as shown in FIG. 6 (a) (b). And a swing operation unit 150 for swinging the operation 141.

The pivoting operation unit 150 is a holder 152 fixed to the plurality of support members 151 extending from the upper inner circumferential surface of the guide hopper 141, and a fixed base assembled on the upper end of the holder 152 ( A drive source for pivoting the guide hopper 141 by attaching a rotary gear 154 rotatably assembled to the 153 and a drive gear 155 geared with the rotary gear 154 to a driving shaft tip. It is comprised including the turning motor 156.

An upper portion of the guide hopper 141 extends from the hopper 110 to prevent the current dropped from the lower surface of the large ceiling 3 from being introduced into the guide hopper 141 in an undifferentiated state. A protective cover 149 is provided.

Here, the holder 152 is vertically disposed in the center of the guide hopper 141, the lower end of the rotary gear 154 is assembled to the upper end of the holder 152 by a plurality of fastening members (154a) The pivoting motor 156 is fixed to the motor base 157 extending from the protective cover 149 by a plurality of fastening members 156a.

The apparatus 100 of the present invention, as shown in Figs. 7 to 9, is adjacent to the electric furnace body 2 of the electric furnace for melting scrap iron using electric energy, and rotated to open and close the upper portion of the electric furnace body (2). It is provided on the work deck (9) corresponding to the rotation completion position of the large ceiling (3), which is now attached to the lower surface of the large ceiling (3) when the scrap metal melting in the electric furnace (2) Dropped by the impact and self-weight generated during the completion of the rotation of the large ceiling (3), now dropped off and accumulates in the hopper 110 provided on the work deck (9).

Continuously, now dropped into the hopper 110 as shown in FIG. 7 is inclined toward the bottom and moved inclined so as to accumulate from the bottom of the hopper by a pair of right and left guide plates 115a and 115b facing each other. The cumulative height goes up.

Then, when the cooling water is supplied through the injection nozzle 121 exposed outside from the upper surfaces of the guide plates 115a and 115b and a predetermined time elapses, Cr ₂ O ₃ , which is now chromium oxide, is 9 to 13.5. Since 30% to 40% by weight of CaO, which is wt% and quicklime, is contained, the hydration reaction (CaO + H ₂ O = Ca (OH) ₂ ) in which 30 to 40% by weight of CaO and the cooling water react with each other ) Is generated and is now differentiated within the hopper 110.

3 to 5 is now differentiated by the hydration reaction, the transfer pipe through the discharge port 113 formed in the lower portion of the induction plate 115a, 115b facing each other during operation of the transfer unit 130 131 is introduced into the discharge pipe 131 and is now transferred to the discharge port 137 by the transfer screw 133 which is rotated by the drive source of the transfer motor 135 and is dropped therethrough.

Then, the eruption now falling from the transfer pipe 131 is dropped into the interior through the open upper portion of the guide hopper 141 of the discharge portion 140 and then connected to the lower end of the guide hopper 141 by its own weight The discharge is guided to the chute 145, and the water is introduced into the water ladle 5 to be recovered.

At this time, if the discharge end of the chute 145 of the receiving ladle (5) is not located, it is driven by applying power to the turning motor 156 as shown in Figure 3 and 6 (a) (b). When the gear 155 is rotated in the forward or reverse direction, the driving gear 155 and the geared rotary gear 154 are also rotated while the holder 152 and the guide hopper 141 connected to the rotary gear 154 are rotated. It is rotated in the forward or reverse direction.

Then, when the discharge end of the chute 145 assembled to the lower end of the guide hopper 141 is located directly on the receiving ladle 5, the driving of the turning motor 156 is stopped, and then As shown in FIG. 9, when the electric furnace 2 is tilted toward the receiving ladle 5, the molten steel is pulled out and differentiated into the receiving ladles 5 through the guide hopper 141 and the chute 145. Perform the operation of dropping and dropping now.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I want to make it clear.

As described above, according to the present invention, the expensive chromium contained in the present is obtained by differentiating the accumulated present as cooling water after dropping out from the lower surface of the large ceiling and then accumulating the accumulated present as cooling water, and re-injecting the differentiated present into the tapping ladle. Since the oxide (Cr ₂ O ₃ ) can be reduced in molten steel, it is possible to reduce manufacturing costs, improve the error rate for the chromium component and the metal component, and prevent environmental pollution.

In addition, an efficient treatment can be achieved by reducing the time and effort required for reprocessing of the drop now, and the additional effect of reducing the risk of a safety accident occurring during the treatment can be obtained.

Claims (5)

In the device for covering the upper part of the electric furnace, and recovering and processing the now attached to the lower surface of the large ceiling that is rotated when the raw material is loaded, A hopper that is stored now dropped from the large ceiling and is dropped; A cooling water supply unit for supplying cooling water into the hopper to induce the current hydration reaction stored in the hopper to promote differentiation; A transfer unit having a transfer motor for rotating a transfer screw provided in the transfer pipe of the hopper to discharge and discharge the now differentiated in the hopper; And A discharge part for discharging the current into the water ladle having a guide hopper in which the eruption spout discharged from the transfer pipe is guided to fall, and a chute of a predetermined length extending from the lower portion of the guide hopper; Electric furnace now ceiling treatment apparatus characterized in that it comprises a. The method of claim 1, The hopper is provided on the work technology that the rotation of the large ceiling is completed, and forms a box on the rectangular parallelepiped with the top open, the discharge port discharged accumulated in the center of the lower surface, so that the dropped drop can be gradually accumulated Electric furnace large ceiling now processing apparatus characterized in that it comprises a pair of right and left induction plate arranged inclined in the receiving box. The method of claim 1, The cooling water supply unit includes a cooling water supply pipe having a plurality of injection nozzles externally exposed on the upper surface of the now induction plate, and a cooling water supply line for supplying cooling water to the plurality of cooling water supply pipes disposed below the now induction plate. Now processing apparatus of the large ceiling with an electric furnace. The method of claim 1, The upper portion of the guide hopper further includes a swing operation portion for pivoting the guide hopper, the swing operation portion is a holder fixed to a plurality of support members extending from the upper inner peripheral surface of the guide hopper, assembled on the top of the holder and horizontal And a turning motor rotatably assembled to a fixed base, and a turning motor mounted to the front end of the drive shaft with the rotating gear and the driving gear engaged with the rotating gear. The method of claim 1, The upper part of the guide hopper is now equipped with a protective cover to prevent the falling from the large ceiling is introduced into the guide hopper, characterized in that the electric furnace large ceiling now processing apparatus.

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