KR20000010964U - Ore damage prevention device of raw material storage tank - Google Patents

Abstract

The present invention relates to a device for preventing damage to the ore charged in the raw material storage tank, more specifically, the soft and raw ore charged in the storage tank through the tripper headsuit safely without falling energy so that spectral and dust generation is suppressed The present invention relates to an ore damage preventing device of a raw material storage tank which is improved to ensure good breathability.

According to the present invention, the head chute 11 is equipped with a multi-stage chute 22 in which an upper chute 22a, a plurality of intermediate chutes 22b, and a lower chute 22c are telescopically coupled to each other. The bracket 23 mounted on the 22 and the rod end are connected to each other, and the plurality of lifting cylinders 24a and 25b having upper and lower limit sensors 25a and 25b are provided. A charging section 20 for dropping the ore 3 is provided with a gate 27 mounted at the rod end to open and close the chute 22c, and a forward and backward cylinder 26 having front and rear sensors 29a and 29b installed therein. And, the bracket 23 is provided with a first level sensor 42 for measuring the appropriate level (L) between the ore (3) and the lower chute (23c) charged in the reservoir 14, the upper end Inside the chute 22a, a second level sensor 44 is provided below the fall protection plate 46 to measure the level of ore stored in the multi-stage chute 22 to determine whether the ore 3 falls. Provides an ore damage preventing device of a raw material storage tank including a;

Description

Ore damage prevention device of raw material storage tank

The present invention relates to a device for preventing damage to the ore charged in the raw material storage tank, more specifically, the soft and raw ore charged in the storage tank through the tripper headsuit safely without falling energy so that spectral and dust generation is suppressed The present invention relates to an ore damage preventing device of a raw material storage tank which is improved to ensure good breathability.

Generally, lead and raw materials (sintered ore, coke) used in blast furnaces of steel mills are continuously stored in eight storage tanks, and the appropriate particle size of lead and raw materials used in blast furnace operations is 5 to 50 mm in sintered ore and 25 to 75 mm in coke. Then, 1500 tons of sintered ore and 3500 tons of coke are charged into the furnace to blow hot hot air (1200 ° C) sent from the hot blast furnace facility to produce a molten metal by reducing melting reaction.

In order to charge ore such as sintered or coke into the furnace during the process, the granulation equipment 100 as shown in FIG. 1 is used. Ore (3) has been transported to the upper portion of the tripper (8) by the belt running in one direction by the pulley (10) guide roller (9). The tripper 8 is made of a 'c' shaped beam member, the guide roller 9 is installed along the upper guide (8a) inclined at an angle to the top of the fixed roller (6) horizontally installed, the lower Two moving rollers 7 are mounted on the guide 12b to travel on the moving rails 5 installed in the upper center of the reservoir 14.

Then, two pulleys 10 are mounted on the head chute 11 on which the transferred ore falls, and the belt conveyor 4 wound around the pulley 10 passes through the guide roller 9 to the head chute. After passing through the (11) is installed to return circulation, one side of the lower surface of the tripper 8 is equipped with a position detection sensor (12a), the tripper sensor 12b for detecting this is of each reservoir 14 It is installed at each central point to allow the tripper 8 to stop in the correct position where the ore can fall.

Therefore, when the tripper 8 moves forward and the head chute 11 is positioned and stopped on the reservoir 14 requiring ore loading, the ore 3 transferred through the head chute 11 is stopped. The dropper is charged and dropped into the reservoir 14 while falling, and when the charged ore 3 reaches the proper level by the reservoir level sensor 13, the tripper 8 stops loading the ore and the fixed rail. (5) to move forward again to another reservoir (14) to perform the repetitive ore loading operation continuously, the ore (3) charged in the reservoir 14 is the particle size selector (18) through the empty chute gate (16) The selected spectrometer is moved to other equipment, and the ore (3) selected for basis weight is moved to the furnace. In FIG. 1, reference numeral 2 is a cable, and 2a is a cable rail.

However, when the ore 3 is charged into the storage tank 14 having a high installation height through the head chute 11 during such ore operation, the ores 3 collide with each other due to the falling energy of the ore 3 or the storage tank is damaged. As the particle size decreases due to the inner wall of (14), spectroscopy and dust generation of 8 mm or less are gradually increased, and such spectroscopy and dust block the screen of the particle size sorter 18 installed in the lower part of each reservoir 14 to prevent a large amount of spectroscopy. And when dust is charged into the blast furnace as it is, the air permeability of the blast furnace caused instability of the yellowing, reducing the production, and caused the fuel costs to rise.

In addition, the ore 3 is damaged by the falling energy of the ore 3 when the ore is introduced into the storage tank 14 from the tripper 8, and the amount of spectral and generation is increased, and the storage tank ( When the ore bath is made in the state where the level of 14) is largely separated, the falling energy of the ore 3 is further turned on, so that the quality of the ore 3 is not easily preserved, and the amount of spectral and dust generation is further increased, so that the air permeability of the blast furnace is increased. In addition to worsening, there is a problem that the process of processing the increased spectroscopy and minute becomes difficult, and the production cost for reproducing the spectroscopy to the ore increases.

In order to minimize screen clogging of the particle size sorter 18 due to the fractional increase due to the friction of the ore 3, the empty chute gate 16 is cut off and then idling to minimize the spectral loading into the furnace. The worker's workload increased because of the need to clean the screen or replace the screen, resulting in lower productivity.

In addition, the ore (3) dropped from the tripper (8) to the storage tank 14 wears out the inner wall portion, and the ore is discharged out of the shell of the air at night, affecting the equipment pollution and the surrounding environment, and the inner wall and the damaged storage tank (14). In order to weld the shell, the ore tank to the storage tank 14 must be stopped, and all the ore in the storage tank 14 must be discharged before work. Therefore, the level of the storage tank 14 becomes deep due to prolonged stopping of the tank. There was a problem in that the falling energy of the ore (3) is increased during the operation to increase the amount of spectral generation.

Therefore, the present invention is to solve such a conventional problem, its purpose is to install a multi-stage chute to adjust the height of the ore to the head chute of the tripper so that the ore can be charged into the storage tank without breaking the ore drop energy By reducing the spectral and dust generation rate in the storage tank to secure the furnace air permeability, to provide an ore damage prevention device of the raw material storage tank to prevent screen clogging phenomenon.

1 is a schematic configuration diagram showing a granulation equipment for charging ore into a raw material storage tank in general,

Figure 2 is a block diagram showing an ore damage preventing device of a raw material storage tank according to the present invention,

Figure 3 is a working state showing the standby state before the ore damage prevention device of the raw material storage tank according to the present invention,

Figure 4 is a working state showing that the ore damage prevention device of the raw material storage tank according to the present invention is operated to charge the ore,

5 is a flow chart of the ore damage preventing device of the raw material storage tank according to the present invention.

Explanation of symbols on the main parts of the drawings

3 ...... Ore 4 ....... Mounting Belt Conveyor

8 ....... Tripper 11 ...... Headsuit

22 ......

24a, 24b ...... Hanging cylinder 25a, 25b ..... upper, lower sensor

26 ...... Front and rear cylinders 27 ...... Gate

28 ...... Hydraulic pump 33 ...... Cab

42 ... first level sensor 44 ... second level sensor

46 ...... Lightning prevention plate 50 ...... Monitoring part

The present invention as a technical configuration for achieving the above object,

Charging equipment equipped with a conveyor belt conveyor for transporting the ore, a tripper moved to charge the ore falling through the head chute stopped at the upper end of the plurality of reservoirs into the storage tank, and a particle size sorter for sorting the ore charged in the storage tank. To

The head chute is equipped with a multi-stage chute, the upper chute, a plurality of intermediate chute, the bottom chute is telescopically coupled elastically, and the bracket and the rod end mounted on the lower chute is connected, having an upper, lower limit sensor It is equipped with a plurality of lifting cylinders, the bracket is equipped with a gate at the end of the rod to open and close the lower chute, and equipped with a forward and backward cylinder in which front and rear sensors are installed;

The bracket is provided with a first level sensor for measuring an appropriate level between the ore charged in the reservoir and the lower chute, and the second chute is installed in the lower part of the fall prevention plate to measure the ore level stored in the multi-stage chute inside the upper chute. By providing a level sensor to determine the fall of the ore sensor unit; by providing an ore damage prevention device of the raw material storage tank characterized in that it comprises.

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

Figure 2 is a block diagram showing an ore damage preventing device of the raw material storage tank according to the present invention, Figure 3 is a working state diagram showing the standby state before the ore damage preventing device of the raw material storage tank according to the present invention, Figure 4 Is a working state diagram showing the ore damage preventing device of the raw material storage tank according to the present invention is charged with the ore, Figure 5 is a flow chart of the ore damage preventing device of the raw material storage tank according to the present invention.

The ore damage preventing device 1 of the raw material storage tank according to the present invention, as shown in Figures 2 to 5, by reducing the falling energy of the ore 3 falling into the storage tank 14 through the head chute 11 spectroscopic and As equipped with the head chute 11 of the tripper 8 so that generation | occurrence | production is suppressed, this apparatus 1 consists of the charging part 20 and the sensor part 40. As shown in FIG. In addition, since the tripper 8 in which the apparatus 1 is installed is the same as the conventional one, detailed description thereof will be omitted.

That is, as shown in Figure 2, the charging section 20 for safely dropping the ore 3 from the head chute 11 is a multi-stage chute 22 assembled telescopically so that the extension length is stretched, and a plurality of The elevating cylinders 24a and 24b and the forward and backward cylinders 26 are provided, and the multi-stage chute 22 is an upper chute 22a in which an upper end is integrally fixed to the lower end of the head chute 11. And a plurality of intermediate suits 22b inserted into the inner circumferential surface of the upper chute 22a so that the outer circumferential surface can be pulled out and assembled so that the upper outer circumferential edge of the upper chute 22a is hung without outside. The lower chute 22c is inserted into the inside of the intermediate chute 22b so as to be pulled out, and the upper end is assembled without an external detachment, and the chute view members 22a, 22b and 22c are made of a hollow cylinder member. The outer diameter is lowered from the upper chute 22a to the lower chute 22c. Is a shape which gradually decreases.

The lifting cylinders 24a and 24b are fixedly installed at both sides of the outer surface of the upper chute 22a and connected to a hydraulic pump 28 installed at one side of the head chute 11 to contract and expand. The upper and lower limit sensors 25a and 25b are respectively mounted on the upper and lower ends of the outer circumferential surface, and each rod end is coupled with the bracket 23 fixed to the lower chute 22c, so that the lifting cylinder 24a According to the length of the rod (21a) (21b) is adjusted according to the expansion, contraction operation of the (24b) can be extended or shortened the overall length of the multi-stage chute 22 assembled in the telescope.

In addition, the forward and backward cylinder 26 is mounted on the lower surface of the bracket 23, which is raised and lowered together with the lower chute 22c, and contracted and squeezed by the hydraulic pump 28, and the rod tip is The gate 27 is moved forward and backward in the guide 27a to open and close the lower chute 22c, and the front and rear sensors 29a and 29b are respectively installed on the outer surface thereof. When the reverse operation 26 is carried out, the ore 3 charged into the multi-stage chute 22 falls through the lower chute 22c opened by the gate 27 from the lower chute 22c to the outside, and conversely, the lower chute ( When the gate 27 is inserted into 22c, the lower chute 22c is blocked so that the ore 3 is charged from the head chute 11 and stacked in the multi-stage chute 22.

Then, the sensor unit 40 to determine whether the ore (3) fall into the storage tank 14, the ore charged in the storage tank 14 to the bracket 23 that is raised and lowered together with the lower chute (22c). A first level sensor 42 for measuring an appropriate level L, which is the distance between the upper side chute and the lower chute 22c, is mounted. Here, the appropriate level (L) is about 1000mm so as to minimize the falling energy so that the ore 3 falling from the lower chute (22c) does not collide with the ore (3) of the uppermost charged in the reservoir 14 It is preferable to set to.

In addition, a second level sensor 44 is mounted inside the upper chute 22a of the multistage chute 22 to measure the level of the ore 3 stored in the multistage chute 22 when the gate 27 is closed. In the upper part, a fall prevention plate 46 is provided so as not to be damaged by the ore 3 falling from the head chute 11.

In addition, the cab 33 is provided with an operation unit 34 for selecting a remote auto mode capable of automatically carrying out an ore loading operation and a manual local mode capable of operating as required by an operator in the field, and the cylinder member 24a ( A control unit 32 is provided for mutual control and operation of devices such as 24b) 26, sensor members 12a, 12b, 25a, 25b, 29a, 29b, 42, 44, and the like. . Reference numeral 28a denotes a hydraulic pipe 28a for connecting the lifting cylinders 24a and 24b and the forward and backward cylinders 26.

Referring to the operation and effects of the ore damage preventing device of the raw material storage tank having the configuration as described above are as follows.

As shown in Figs. 3 to 5, first, the level of the ore 3 charged in each of the first to eighth reservoirs 14 is detected at any time by the reservoir level sensor 13 installed at each upper portion of the cab. A bar graph and a number are displayed on the screen of the instrumentation computer, and the monitoring unit 50 which monitors the level of each reservoir 14 comprehensively measures and monitors the level of the reservoir 14 at any time.

Subsequently, when the level measured value is a condition in which the ore level of the first to eighth reservoirs 14 is 60% or less of the total storage amount, the tripper 8 automatically moves from the lowest reservoir 14 to the sequential order. Ore sedimentation operation is started, when the position detection sensor 12a of the tripper 8 moving on the fixed rail 5 detects the tripper sensor 12b of the reservoir 14, the tripper ( 8) is accurately positioned in the upper center of the reservoir 14, at the same time the hydraulic pump 28 is started to transmit a constant pressure to the lifting cylinder 24a, 24b side.

Accordingly, the lower end fixed to the bracket 23 of the rod end while the rod 21 extends downwardly due to the expansion operation of the lifting cylinders 24a and 24b disposed on the left and right sides of the multi-stage chute 22. The chute 22c is withdrawn from the middle chute 22b to the bottom, and the intermediate chute 22b is also extended outwardly from the top chute 22a to the bottom so that the lower chute 22c is positioned in the reservoir 14. . Then, after the lowering of the multi-stage chute 22 passes for a predetermined time, 3 to 5 seconds, the first level sensor 42 mounted on the bracket 23 is operated to load the ore 3 charged into the reservoir 14. Measure the distance between the upper end of the bottom and the lower chute 22c, and if the distance measured based on 1000 mm, which is an appropriate level (L), is greater than the reference, the lifting cylinders 24a and 24b are continued. Inflation operation reduces the distance between the lower chute 22a and the upper end of the ore 3, and stops the lowering operation of the lowering cylinders 24a and 24b when the measured distance approaches the appropriate level L. By stopping the extension of the chute 22, it is possible to maintain the appropriate level (L) to minimize the falling energy of the ore (3).

Then, when it is confirmed by the second level sensor 44 installed in the multi-stage chute 22 that the ore 3 can be charged into the multi-stage chute 22, the rear-end sensor 29b of the front / rear cylinder 26 is provided. Since the contraction is caused by the electrical signal of the gate, the gate 27, which has closed the lower chute 22c, is pulled out, and the ore 3 in the multi-stage chute 22 is dropped into the reservoir 14, As the distance between the lower chute 22c and the top end of the ore of the reservoir 14 is at an appropriate level to minimize the drop energy, the falling ore 3 is charged without being damaged in the reservoir. At this time, if the level of the ore in the multi-stage chute 22 measured as the second level sensor 44 is low, the ore in the multi-stage chute 22 extended by maintaining the blocking state of the lower chute 22c as the gate 27. Let (3) continue charging.

When the loading of the ore into the reservoir 14 is continued and the distance between the upper end of the ore and the lower chute 22c is less than or equal to the proper level L, the distance measured as the first level sensor 42 maintains the proper level. The lifting cylinders 24a and 24b are sequentially contracted, and continuously carry out the operation of charging the ore 3 into the reservoir 14 while gradually reducing the extension length of the multi-stage chute 22.

When the lifting cylinders 24a and 24b are contracted as much as possible and the upper limit sensor 25a is detected, the forward and backward cylinders 26 are moved forward by the electric signal of the upper limit sensor 25a to lower the lower chute 22c. ) Is interrupted by the gate 27 to stop the loading of the ore, and the tripper 8 moves to the next reservoir 14 to continuously perform the above operation.

In addition, the operation unit 34 of the cab 33 can be freely selected as a remote auto mode that can automatically perform ore loading operation or manual local mode that can operate as required by the operator in the field, the ore level of the storage tank 14 Irrespective of whether it is high or low, regardless of the automated sequence, if the manual start mode of the tripper 14 is selected by pressing the manual start mode of the operation unit 34, the same control operation as in the automatic operation state is possible.

According to the present invention as described above, the multi-stage chute 22 mounted on the head chute 11 is lowered to approach the upper end of the ore in the storage tank 11 to extend the length of the multi-stage chute 22 according to the appropriate level (L). While the ore is controlled and preserved in the state before granulation without damage, it can safely enter into the storage tank, so that the amount of spectroscopy and dust generation is small, and enough voids can be secured during the ore dock period in the furnace, so that the ventilation of the furnace is good, which contributes to stabilization of the furnace. have. In addition, by minimizing the processing of the spectral amount returned to the previous process, it is possible to reduce the cost used to produce the ore material, reduce the screen replacement time of the particle size sorter, and reduce the burden on the worker.

Claims (1)

The moving belt conveyor 4 for transporting the ore 3 and the ore 3 which is stopped at the upper portion of the plurality of reservoirs 14 and falls through the head chute 11 are charged to the reservoir 14. In the charging facility having a tripper (8) and a particle size separator (18) for sorting the ore (3) charged in the reservoir (14), The head chute 11 is equipped with a multi-stage chute 22 in which an upper chute 22a, a plurality of intermediate chutes 22b, and a lower chute 22c are telescopically coupled to each other, and the lower chute 22 Is mounted on the bracket 23 and the rod end is provided, and has a plurality of lifting cylinders 24a and 25b having upper and lower limit sensors 25a and 25b, and the bracket 23 has the lower chute ( A charging portion 20 having a gate 27 mounted to the rod end to open and close 22c, and having a front and rear oscillation cylinder 26 in which front and rear sensors 29a and 29b are installed; Wow, The bracket 23 is provided with a first level sensor 42 for measuring an appropriate level L between the ore 3 charged in the reservoir 14 and the lower chute 23c, and the upper chute 22a. A sensor unit 40 having a second level sensor 44 installed below the fall prevention plate 46 to measure the level of the ore stored in the multi-stage chute 22 and determining whether the ore 3 falls; Ore damage prevention device of the raw material storage tank comprising a.