KR20030035664A - An apparatus for controlling the angle of inclination in a screen - Google Patents

Abstract

PURPOSE: Provided is an inclination adjuster in a screen which forms a cylinder member under the screen to adjust the inclination of a screen body as granularity of raw materials in working the screen so that it raises the efficiency of the screen. CONSTITUTION: In a screen facility which consists of the screen body(108a) to include an upper and a lower screen net(106,107) and a vibrator(105) to supply a vibrating source, the inclination adjuster in the screen comprises the parts of: a gate part(10) which allows an empty gate(11) to be elevated by a working motor(13) and open or close an empty chute; a working part(30) which forms a cylinder member(31) at both release sides of the screen body to change inclination of the screen body; and a control part(50) which controls the elevation of the cylinder member and the closing action of the empty gate to allow the screen body to be washed.

Description

Screen tilt adjuster {AN APPARATUS FOR CONTROLLING THE ANGLE OF INCLINATION IN A SCREEN}

The present invention relates to a device for adjusting the inclination of the screen, more specifically, the screen is installed to be inclined to classify the raw material ore by particle size varying the inclination in accordance with the ratio of the spectroscopic ore can be the basis weight of the appropriate particle size, upper and lower screen It is possible to clean the net, and relates to an inclination adjusting device of the screen that can effectively manage the particle size of the raw ore.

In general, the raw material charged into the blast furnace of the steel mill is discharged from the raw material storage bin 110, as shown in Figure 1 is disposed between the storage bin 110 and the weighing hopper 109 screen for classifying the raw material by particle size After passing through 108, the raw material classified by particle size is introduced into the weighing hopper 109, which weighs down the raw material.

That is, as shown in FIGS. 2 and 3, the raw material flows as much as a gap formed between the bin gate 103 and the bin chute 102 of the storage bin 110 so that the screen body of the screen 108 ( The upper and lower screen nets 106 and 107, which are provided with different eye sizes at 108a, are dropped and supplied to the upper side of the upper and lower screen nets 106 and 107. At this time, the screen vibrator 105 is installed on the screen body 108a of the screen 108. When is operated, the whole screen body 108a vibrates up and down, and starts classifying the raw materials dropped on the upper screen net 106 by particle size.

In addition, the shock absorbing portion 120 is provided between the screen body 108a and the flow base 123, which is the vibration between the spring bracket 122 and the flow base 123 of the screen body 108a. The spring member 121 is configured to absorb the impact of the screen body 108a during the vertical vibration by the device 105.

Here, the screen body (108a) of the screen 108 is the bin chute 102 side is high, the charging hopper (Weighing Hopper) 109 side of the furnace 150 is installed low so that the bin chute 102 and weing Since the vibrator 109 vibrates the screen body 108 up and down with respect to the horizontal imaginary line between the hopper 109 and the horizontal imaginary line, the upper screen net 106 is drilled. The raw material having a particle size smaller than the eye size passes through and falls to the lower screen net 107, and the raw material having a larger particle size than the eye size drilled in the upper screen net 6 flows to the lower side of the open screen body 108a. It is supplied to the weighing hopper 109 side.

In addition, the eyes of the lower screen net 107 of the raw material falling out of the eye of the upper screen net 106 and dropped to the lower screen net 107 during the operation of classifying the raw material falling into the screen 108 by the particle size. Raw material smaller than the size is collected at the bottom of the screen body 108a and dropped into the spectroscopic chute 111 and sent back to the sinter plant through a spectroscopic belt conveyor 112, and the screen The raw material flowing over the upper screen net 106 and the lower screen net 107 of the 108 is separated by the hopper 109 and transferred to the upper part of the furnace 150 through the raw material transport belt conveyor 113 for charging the furnace. .

However, due to the following problems during the process of classifying the raw materials by particle size using the conventional screen 108, the classification of the raw materials for charging is poor, resulting in deterioration of breathability in the furnace, resulting in a decrease in productivity.

That is, as shown in FIG. 3, the role of the bin gate 103 is that an appropriate amount of raw material to be charged into the furnace 150 passes from the storage bin 110 through the bin chute 102 to the screen 108. If the gap is adjusted so as to flow in, or the bin gate 103 operated by the opening and closing means not shown is closed to adjust the gap so as to reduce the amount of raw materials, the gap between the bin gate 103 and the chute 102 is thick. As the ore is pinched, the discharge passage is suddenly narrowed to obstruct the ore discharge flow, which slows down the flow of the raw ore, causing a congestion phenomenon, thereby causing the discharge passage of the empty chute 102 to be blocked.

Therefore, in order to prevent clogging of the ore, the empty gate 103 is opened more than necessary, so that a large amount of soft and raw ore falls into the upper screen net 106 of the screen 108. Since a large amount is screened at a time and is temporarily screened, raw ore in a state in which the ore is not properly spectroscopically sorted by the particle size is supplied to the weighing hopper 109 and simultaneously supplied to the charging transport belt conveyor 113. Since the raw ore containing a large amount of spectral is transported and charged in the furnace 150, there is a problem of lowering work productivity by inhibiting air permeability inside the furnace.

In addition, the empty gate 103 has the trouble that the operator must adjust the opening degree appropriately according to the blocked state of the raw material ore on the upper and lower ends 106 and 107 of the screen 108, and the operator is at an appropriate time. When the empty chute 102 is blocked, the empty gate 103 is completely opened in order to alleviate the trouble of the operator. When the empty gate 103 is completely opened and used, the efficiency of the screen 908 is reduced and the furnace 150 is required. There existed a problem of being unable to supply the lead of a suitable particle size, and a raw material ore.

Therefore, the present invention has been proposed to solve the conventional problems as described above, the object is to adjust the inclination to the horizontal plane in accordance with the proportion of the spectroscopically installed screen inclined to classify the raw material ore by particle size, the basis weight of the appropriate particle size It is possible to provide a screen inclination adjustment device capable of effectively managing the particle size of the raw ore by periodically cleaning the upper and lower screen net.

1 is a schematic diagram showing a raw material transport flow charged in a general furnace;

2 is a front view showing a screen installation according to the prior art,

3 is a perspective view showing a screen installation according to the prior art,

Figure 4 (a) (b) is a perspective view showing the gate portion and the operating portion employed in the tilt adjustment device of the screen according to the present invention,

5 is an overall configuration diagram showing an inclination adjustment device of the screen according to the present invention,

Figure 6 is a flow chart showing the operation of adjusting the tilt of the screen according to the invention.

Explanation of symbols on the main parts of the drawings

11 ..... Bingate 12 ..... Passive rack gear

13 ..... operating motor 14 ..... driven pinion gear

31 ..... Cylinder members 33a, 33b .... Control valve for tilt angle adjustment

34a, 34b ... Electronic valve 35 .... Shock absorbing spring member

51 .... Controller 52 ....

108 ... screen 108 a ... screen body

As a technical configuration for achieving the above object, the present invention,

In the screen equipment having a screen body having a top and bottom screen net, and a vibrating device for providing a vibration source for vibrating it up and down, classify the raw material ore by particle size,

A gate portion for raising and lowering the empty gate for opening and closing the discharge passage of the empty chute for introducing raw ore into the screen body by the driving source of the operating motor;

An operating part for vertically turning the discharge side of the screen body to the supply side to vary the inclination of the screen body by vertically equipping cylinder members on both sides of the discharge end of the screen body so as to change the residence time of the raw ore;

And a control unit for controlling the lifting and lowering of the cylinder member to change the inclination of the screen body based on the fractional data of the raw ore, and for controlling the closing operation of the bin gate to enable the screen body to be cleaned. By providing a device for adjusting the tilt of the screen characterized in that.

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

Figure 4 (a) (b) is a perspective view showing the gate portion and the operating portion employed in the inclination adjustment device of the screen according to the invention, Figure 5 is an inclination of the screen according to the invention 6 is an overall configuration diagram showing an adjusting device, and FIG. 6 is an operating flowchart showing an inclination adjusting device of the screen according to the present invention.

As shown in Figs. 4 to 6, the apparatus 1 of the present invention is equipped with a screen 108 for classifying the raw ore dropped from the storage bin 110 by the particle size and classifying the screen according to the change in the fraction of the raw ore. The inclination of the 108 is raised or lowered with respect to the horizontal bottom surface so that the raw material ore of the proper particle size can always be loaded into the furnace 150, and the apparatus 1 includes the gate part 10 and the operation part 30. ) And the controller 50.

That is, the gate unit 10 is a screen unit 108a having upper and lower screen nets 106 and 107, a vibration device 105 that provides a vibration source capable of vibrating it up and down, and a vibration occurs. A bin gate having a shock absorbing unit 120 for absorbing the shock, the opening or closing operation of the raw material ore of the storage bin 110 into the screen body 108a in the screen 108 for classifying the raw ore by particle size ( 11) is provided in the discharge passage of the bin chute 102, and is provided with an operating motor 13 for providing a drive source for operating the bin gate 11 up and down.

Here, the front of the bin gate 11 is integrally provided with a drive pinion gear 14 and a driven rack gear 12 geared to the drive shaft (13a) of the operation motor 13, the bin When the detection signal is generated to detect the closing and opening of the gate 11, the sensing bar 16 which is sensed by the upper and lower sensor members 15a and 15a for controlling the operation motor 13 is connected to the empty gate 11. It is integrated in one side and constitutes.

The upper and lower sensor members 15a and 15b are installed at a predetermined interval on the sensor bar which is fixed to the bin chute 102 or another fixing member, and the drive shaft 13a is rotatably mounted to the bearing block 13b. Supported.

In addition, the operation unit 130 for varying the inclination of the screen body 108 for classifying the raw ore dropped from the empty chute 102 by particle size is discharge stage for discharging the ore classified to the supply side in which the raw ore falls supply It is configured to vertically rotate the cylinder member 31 connected to the rod end on both sides of the left and right sides of the discharge end of the screen body (108a) so as to change the residence time of the raw material ore passing through it up and down.

The cylinder member 31 is provided between the flow base 123 and the fixed base 129 of the shock absorbing portion 120 provided in the vicinity of the discharge end of the screen body (108a), the phase of supplying fluid is discharged The lower hydraulic lines 32a and 32b transmit an operation signal from the inclination angle control control valves 33a and 33b to control the supply of the rising and lowering fluid pressures and the controller 51 to control the opening and closing thereof. The receiving electron sides 34a and 34b are connected.

In addition, the left and right sides of the cylinder member 31 and the hollow upper pipe (35a) is connected to the upper end is connected to the flow base 123 to absorb the shock during the up and down operation, and is inserted into the lower portion on the fixed base (129) A lower pipe 35b to which a stage is connected and a buffer spring member 35 for connecting between the upper and lower pipes 35a and 35b are configured.

In addition, the right and left ends of the cylinder member 31, the flange portion 36a is provided for easy repair and replacement, respectively, and another flange portion 36b is also provided on the upper pipe 35a, and the cylinder member The lower end of the 31 and the fixed base 129 is linked via a hinge pin 37a, and the lower pipe 35b and the fixed base 129 are also linked through another hinge pin 37b. Connected and assembled.

On the other hand, the control unit 50 is based on the fractional data of the raw ore charged into the furnace 150, the timing and raw material of the operation motor 13 for opening and operating the bin gate 11 of the bin chute 102 It is to control the up and down operation of the cylinder member 31 assembled at the discharge end of the screen body (108a) to increase or decrease the inclination of the screen body (108a) for classifying the particle size of the ore.

The control unit 50 includes a process computer 53 for receiving fractional data of raw ore, PLC 52 for transmitting a signal for adjusting the inclination of the screen, and information for cleaning the screen based on the data. The controller 51 is configured to control the operation of the operation motor 13, the electromagnetic valves 34a and 34b, and the control valves 33a and 33b according to the work signal of PLC.

The operation and effects of the present invention having the configuration as described above will be described.

First, the particle size is analyzed before charging the soft and raw ore into the furnace, and the data analyzed by the time zone fraction as shown in Table 1 is continuously transmitted from the analysis room to the process computer 53 of the cab six times or more per day. .

division 07:00 03:00 23:00 19:00 15:00 11:00 -5mm 6.6 7.0 6.1 5.9 5.0 6.2 -10mm 24.2 27.7 28.1 26.0 25.4 29.9 Sum 32.8 34.7 34.2 29.9 30.4 35.1

In addition, a fraction (typically 3% to 30% range) of the proportion of less than 10 mm of the total raw ore in the process computer 53 receiving the data analyzing the particle size of the raw ore; ) Can be shared by the PLC 52 and the instrument controller 51 electrically connected thereto.

Then, the inclination of the screen 108 is controlled by the controller 50 based on the fractional data of the raw ore.

When the open signal is transmitted from the controller 53 of the controller 50 to the operation motor 13, the drive shaft 13a is rotated forward while rotating the drive pinion gear 14 mounted thereon, and driven driven gear As the size word 12 is raised, the empty gate 11 is lifted to the upper portion to open the discharge passage of the empty chute 102 so that the raw ore falls into the screen body 108a of the screen 108.

The opening operation of the operation motor 13 is controlled by the detection signal detected by the detection bar 16 of the empty chute 11 which is operated in the rising direction corresponding to the upper sensor member 15b, and on the contrary, the closing operation is also lowered. The detection bar 16 of the empty chute 11 is controlled by a detection signal detected corresponding to the lower sensor member 15b.

On the other hand, the inclination of the screen 108 shares the information of the fraction distribution range of the raw ore analyzed by the process computer 53 in the PD 52, and transmits the operation signal to the electromagnetic side (34a) 34b side By changing the screen body 108a of the screen 108 with respect to the bottom surface.

At this time, the flow rate of the working fluid supplied / discharged into the cylinder member 31 through the control valves 33a and 33b connected to the upper and lower hydraulic lines 32a and 32b of the cylinder member 31 is properly adjusted. By performing the variable inclination to increase or decrease the inclination at the discharge end of the cylinder body (108a).

That is, the screen body 108a is held by the cylinder member 31 so as to maintain a reference angle inclined by 10 ° with respect to the horizontal bottom surface when the fraction of raw ore is within an appropriate reference range of 16% to 25%. When the fraction of the analyzed raw ore is in the low range of 3% to 15%, the cylinder member 31 is lowered to maintain the installation inclination 15 ° higher than the reference angle of 10 °, while the fraction of the raw ore is The cylinder member 31 is upwardly adjusted to maintain an installation inclination of 5 ° lower than the reference angle of 10 ° when in the high range of 25% to 30%.

Here, the inclination of the screen body (108a) is fixed to the fixed base 129 so that the indicator 62 is pointed to the goniometer 61 is installed on one side, and the scale of the goniometer 61, When the inclination of the screen body 108a is measured by a digital gauge, the data is transmitted to the process computer 53 side of the controller 50.

Table 2 below shows the basic installation specifications of the screen 108 for the basis weight treatment of iron ore, which shows the basis weight capacity when the installation inclination of the screen body 108a is inclined at a reference angle of 10 ° with respect to the floor surface.

Capacity (t / h) Capacity (t / min) Motor capacity (Kw) Specification (mm) Screen body tilt (°) efficiency(%) 470 7.8 37 7312 × 2486 10 80

That is, at a reference angle of 10 °, the screen body 108a into which the raw material ore falls is inputted, and a basis weight of 470 tons per hour and 7.8 tons per minute is possible.

Therefore, the apparatus of the present invention analyzes the variation of the fraction of the raw ore to be granulated to the furnace 150 through the screen 108 for classifying the raw ore by the particle size, and accordingly adjust the inclination of the screen 108 to the furnace It is to ensure that only the raw ore of the proper particle size is always charged inside.

As described above, when the fraction of the raw ore to be granulated into the furnace 150 is in the low range of 3% to 15%, the inclination of the screen body 108a of the screen 108 is adjusted upward to 15 ° to adjust the raw ore. When the inclination of the screen body 108a is increased, the time that the raw material ore stays in the upper screen net 106 and the lower screen net 107 of the screen main body 108a is shortened. Ore can be classified and weighed to increase productivity.

That is, in order to classify and basis the basic amount 7.8 (ton / min) of the raw material ore set at a 15 ° inclination of the screen body 108, the raw material ore is the upper screen net 106 and the lower screen net 107. Increasing the inclination angle of the ore, it is possible to improve the work productivity by reducing the running time of the basis weight screen 108 of the raw ore.

Therefore, in the working conditions where the quantum body of the spectroscopic stones contained in the raw material ore to be fed to the storage bin (Bin) 110 side of the blast furnace is small, even if the inclination angle of the screen body 108 is increased and the basis weight time is short, Only raw material is weighed so that it can be charged into the furnace.

On the other hand, if the fraction of the raw ore is within the appropriate range of 16% to 24% required by the blast furnace, the inclination angle of the screen body 108a is adjusted or maintained at a reference angle of 10 ° to basis weight of iron ore of 7.8ton / min Done.

In addition, if the fraction of the raw ore to be granulated is in the high range of 25% to 30%, and the content of the ore is high in the raw ore, the inclination of the screen body 108a is adjusted to 5 ° so as to drop the raw ore. It is classified and dropped into the weighing hopper to be weighed. The inclination of the screen body 108a is reduced so that the raw material ores stay in the upper screen net 106 and the lower screen net 107 of the screen main body 108. The time becomes long, and in this case, the raw material ore can be weighed by sufficiently selecting the spectroscopy of 10 mm or less.

That is, in order to basis weight 7.8 (ton / min) of the raw material ore set in the state where the inclination of the screen 108 is 5 °, the inclination of the upper screen net 106 and the lower screen net 107 is reduced. In this case, the running time of the screen 108 becomes long.

Therefore, when the amount of spectroscopic stones in the raw material ore which is granulated to the storage bin (Bin) 110 side of the blast furnace itself is large, the inclination angle of the screen body 108a is reduced and the classification and basis weight time are extended to the furnace 150. The particle size of the charged raw ore is made uniform.

On the other hand, as the classification and basis weight process of the raw material ore is repeated, the clogging phenomenon of the upper screen net 106 and the lower screen net 107 of the screen body 108a increases according to the content of spectroscopic ore, that is, Under the same inclination conditions at the same recovery classification basis weight, the blocking condition of the upper screen net 106 and the lower screen net 107 is increased in the working condition with a high content of spectroscopy.

Therefore, by varying the inclination of the screen body (108a) according to the content of spectroscopic ore to perform the classification and basis weight operation of the raw ore, and to count (count) the operating frequency of the screen body (108) when using the predetermined number of times or more Closes the bin gate 11 using an operation motor 13 for opening and closing the bin gate 11 of the bin chute 102, and the detection bar lowered together with the bin gate during the closing operation of the bin gate 11. The screen 108 is operated in a state in which there is no raw material ore in the upper and lower screen networks 106 and 107 of the screen body 108 by the detection signal of the lower sensor member 15 corresponding to (6). By idling, the attachment light attached to it is cleaned.

That is, when the raw material ore is weighed in a state where the inclination of the screen 108 is 15 ° by satisfying the condition that the fraction of the raw material is 3% to 15%, the empty gate 11 is closed every 30 basis weights. To clean the upper and lower screen nets 106 and 107 by applying vibration to the screen body 108a once for 5 minutes, and the degree of inclination of the screen body 108a by satisfying the conditions of 16% to 25%. When the raw material ore is weighed at 10 °, the raw material ore is weighed at a 5 ° inclination of the screen body 108a by satisfying the condition of 26% to 30% for 5 minutes once every 20 basis weights. When the screen body 108a is vibrated for 5 minutes, once every 10 basis weights, the upper and lower screen nets 106 and 108 are cleaned.

As such, the slope of the screen body 108a of the screen 108 is automatically adjusted up and down based on the fraction data provided by the process computer 53 according to the variation of the fraction of the raw ore into the storage bin 110. The amount of time the raw material ore dwells on the upper screen net 106 and the lower screen net 107 of the screen 108 is adjusted to basis weight of the raw ore, the basis weight is counted, and the idling cleaning of the screen 108 is cycled. In order to increase the efficiency of the screen, it was always possible to load iron ore with a constant particle size (range of 16 ~ 24%) regardless of the variation of the fraction of raw ore granulated in the whole process.

According to the present invention as described above, the screen operation for classifying and weighing the raw ore by having a cylinder member for operating the discharge end of the screen body up and down to the supply side on the lower side of the screen to classify and ore the raw ore by particle size It automatically adjusts the inclination of the screen body according to the particle size of the raw material ore and automatically cleans the upper and lower screen nets of the screen, so that the raw material ore is balanced without clogging the empty chute, and the screen efficiency is increased. The raw material ore of the proper particle size is always selected and charged into the furnace to ensure ventilation in the furnace, thereby achieving stable operation and improving work productivity.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

Claims (6)

In the screen facility having a screen body (108a) having upper and lower screen nets (106, 107) and a vibrating device 105 for providing a vibration source for vibrating it up and down, classifying the raw material ore by particle size , A gate portion 10 for raising and lowering the empty gate 11 for opening and closing the discharge passage of the empty chute 102 into which the raw material ore is introduced into the screen body 108a by the driving source of the operating motor 13; The screen body (vertical) is provided vertically on the left and right sides of the discharge end of the screen body (108a) so that the discharge time of the screen body (108a) is rotated up and down with respect to the supply side to vary the residence time of the raw ore. Actuator 30 for varying the inclination of 108a and Based on the fractional data of the raw material ore, the lowering of the cylinder member 31 is controlled to vary the inclination of the screen body 108a, and the bin gate 11 is configured to allow the screen body 108a to be cleaned. Tilt adjustment device of the screen, characterized in that it comprises a control unit (30) for controlling the closing operation. The method of claim 1, The front surface of the bin gate 11 is integrally provided with a drive pinion gear 14 mounted on the drive shaft 13a of the operation motor 13 and a driven rack gear 12 geared thereto. 11) one side end of the bin gate 11 with a sensing bar 16 detected by the upper and lower sensor members 15a and 15a for controlling the operation motor 13 when a detection signal is generated so that the closing and opening of the 11) can be seen. Tilt adjustment device of the screen, characterized in that integrally equipped with. The method of claim 1, The cylinder member 31 is provided between the flow base 123 and the fixed base 129 of the shock absorbing portion 120 provided in the vicinity of the discharge end of the screen body (108a), the image of the fluid supply discharge The lower hydraulic lines 32a and 32b have inclination-angle control valves 33a and 33b for controlling the supply of the rising and lowering fluid pressures, and electromagnetic valves 34a and 34b which receive an operating signal for controlling the opening and closing thereof. Tilting device of the screen, characterized in that the connection configuration. The method of claim 1, On the left and right sides of the cylinder member 31, a hollow upper pipe 35a having an upper end connected to the flow base 123 so as to absorb shock during up and down operation, and a lower end of the cylinder member 31 inserted into the fixed base 129. The lower pipe (35b) to be connected and the upper and lower pipes (35a, 35b) is provided with a cushioning spring member (35) for connecting between the inclination adjusting device, characterized in that the configuration. The method of claim 1 The screen body 108a is maintained and controlled by the sealing member 31 so as to maintain a reference angle inclined by 10 ° with respect to the horizontal bottom surface when the fraction of raw ore is within an appropriate reference range of 16% to 25%. When the fraction of the analyzed raw ore is in the low range of 3% to 15%, the cylinder member 31 is lowered and adjusted to maintain the installation inclination 15 ° higher than the reference angle of 10 °, while the fraction of the raw ore is 25 And tilting the cylinder member (31) so as to maintain an installation tilt of 5 ° lower than the reference angle of 10 ° when in a high range of 30% to 30%. The method of claim 1 The screen body 108 satisfies the condition that the fraction of the raw ore is 3% to 15%, and when the raw material ore is weighed in a state where the inclination of the screen 108 is 15 °, the empty gate every 30 basis weights ( 11) The upper and lower screen nets 106 and 107 are cleaned by vibrating once for 5 minutes in a closed state, and the inclination of the screen body 108a is increased by 10 ° as the fraction satisfies the conditions of 16% to 25%. When the raw material ore is weighed in the form, it is vibrated for 5 minutes once every 20 basis weights to clean the upper and lower screen nets 106 and 107, while the fractions satisfy the conditions of 26% to 30%. When the raw material ore is weighed at a state of inclination of 5 ° 108a, the screen is inclined for 5 minutes once every 10 basis weights to clean the upper and lower screen nets 106 and 108. Adjuster.