KR20010060711A - Apparatus for controlling the granule materials of sintering machine - Google Patents

Abstract

PURPOSE: An apparatus for controlling finely divided material of a sintering machine capable of regularly maintaining the thickness of a finely divided material layer by detecting a discharge amount and controlling a controlling inclined plate in accordance with the detected discharge amount is provided, which makes it possible to produce sintered ores having uniform quality and stabilizes a blast furnace. CONSTITUTION: In a sintering machine equipped with a storage hopper(108), a drum-type charging machine(110), a charging inclined plate(114) and a plurality of slit bars(115), this raw material controlling apparatus contains an angle control plate(15) for controlling a charging amount of finely divided material; an operating cylinder(17) connected to a rear surface of the angle control plate at its rod end part(17b); and a supersonic level sensor(11) for controlling the installation angle of the angle control plate by detecting the amount of finely divided raw material to be generated and operating the operating cylinder based on the detected measured values.

Description

APARTATUS FOR CONTROLLING THE GRANULE MATERIALS OF SINTERING MACHINE

The present invention relates to a fine raw material control device of the sintering machine improved to detect the discharge of the fine raw material during the charging of the raw material for the production of sintered ore, and to adjust the inclined plate according to the detected discharge to maintain a constant after layer of the micro raw material layer will be.

In general, the most widely used sintering method for the agglomeration of iron ore is a method suitable for mass production, as shown in FIGS. 1 and 2, such as iron ore of 8 mm or less as a main raw material and limestone, silica, serpentine, quicklime, etc. In the storage bin 105 that stores the material and fuel, such as powdered coke, anthracite, etc., is discharged to the drum mixers 106 and 107 using the dispensing equipment 101, and the drum mixers 106 and 107 have a constant ratio. After mixing and assembling by adding water, the mixture is charged into the raw material storage tank 108, and the vertical segregation is induced on the top surface of the inclined plate 114 from the drum-type extruder 110 located below the storage tank 108. It consists of a configuration to charge the blended raw material into the cart (111).

In FIG. 1, reference numeral 109 denotes an ignition furnace, 102 denotes a suction line, 103 denotes a crusher facility for crushing sintered ore, and 112 denotes a screen facility for separating crushed sintered ore.

In addition, as shown in FIGS. 2 and 3, the slit bar operating cylinder 105a is operated to induce the micro raw material into the upper layer due to the vertical segregation defect of the charged raw material in the bogie 111 and the strength of the surface layer. A plurality of slit bars 115 are installed at regular intervals to reinforce segregation, but due to the thickness change of the fine raw material layer that is generated while passing through the slit bar 115 positioned at the bottom of the charging ramps 114, in the bogie 111. The speed of the combustion zone passing through the raw material layer, that is, the flame propagation speed becomes unstable, and the change of the loading density for each of the portions of the bogie 111 within the effective image distance (100 m), that is, the quality variation of the sintered ore used more than 80% as blast furnace raw material. This is the instability of Rohwang.

The cause of variation of the fine raw material layer in the surface layer portion in the trolley 111 can be almost seen in the charging device and the problems and details are as follows.

First, adhesion light is formed on the slit bar 115 by the moisture contained in the blended material due to the sintering characteristics, and the micro raw material is jumped on the slit bar 115 located under the charging ramp plate 114 due to the adhesion light. As the phenomenon of jumping and treating it as an automatic removal device (not shown), the generation amount is changed,

Second, the generation amount is changed according to the efficiency of the slit bar 115 located below the charging ramp plate 114,

Third, the generation amount is changed according to the amount of the blended raw material introduced into the bogie 111 per unit time due to the rotational speed change of the drum-type cutting machine 110 located at the bottom of the raw material storage hopper 108,

Fourth, the generation amount is changed according to the inclination angle of the charging slope plate 114,

Fifth, the generation amount is changed according to the thickness of the raw material layer controlled in the main discharge door 116 and the auxiliary discharge door (not shown) located at the bottom of the raw material storage hopper 108,

Sixth, the generation amount was varied according to the distribution average particle size and pseudo granulation degree of the blended raw materials.

As described above, if the thickness of the fine raw material layer is uneven when charging the blending material in the trolley 111, there is a problem that the fall strength and recovery rate of the layered portion is lower than the lower portion due to the low loading density and lack of heat supply.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, the object of which is to improve the sintering quality by detecting the discharge of the fine raw material at the time of sintering and controlling it to make the fine raw material layer of the upper part of the raw material uniform. It is to provide a fine raw material control device of the sintering machine.

1 is a schematic view showing a typical sintered ore manufacturing equipment,

Figure 2 is a perspective view showing a charging device of the compounding material for sintering according to the prior art,

Figure 3 is an overall configuration showing a fine raw material control device of the sintering machine according to the present invention,

Figure 4 (a) (b) is an operating state diagram showing a fine raw material control apparatus of the sintering machine according to the present invention,

Figure 5 is a flow chart showing the operation of the fine raw material control apparatus of the sintering machine according to the present invention.

* Explanation of symbols for the main parts of the drawings *

11 ..... Ultrasonic level sensor 14 ..... Horizontal bar

14a .... 1st rotating pin 15 ..... Angle adjustment plate

17 ..... cylinder 17a .... 2nd rotating pin

108 .... storage hopper 110 .... drum type extruder

114 .... Slope plate 115 .... Slit bar

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

In the storage hopper storing the compounding material, the drum-type extruder for charging the compounding material in the balance, and the sintering machine for manufacturing the sintered ore by providing a plurality of rod-shaped slit bars on the inclined charging plate to induce vertical segregation,

An angle adjusting plate having an upper end rotatably mounted as a first rotary pin to adjust the amount of fine raw material loaded on a horizontal plate installed horizontally on the rear surface of the charging ramp plate;

An actuating cylinder having a rear end rotatably assembled as a second rotating pin on the horizontal rod and having a rod end connected to a rear surface of the angle adjusting plate;

Ultrasonic level sensor for detecting the amount of generation of the fine raw material in the lower portion of the loading ramp, and operating the operating cylinder on the basis of the detected measured value to control the installation angle of the angle adjustment plate; By providing a fine raw material control device.

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

3 is an overall configuration diagram showing a fine raw material control apparatus of the sintering machine according to the present invention, Figure 4 (a) (b) is an operating state diagram showing a fine raw material control apparatus of the sintering machine according to the present invention, Figure 5 is a flow chart showing the operation of the fine raw material control apparatus of the sintering machine according to the present invention.

3 and 4 (a) (b), the adjusting device 1 of the present invention is provided at the rear of the charging ramp plate 114 to which the compounding material falling from the drum-type cutting machine 110 collides with the slit bar. Detects the amount of micro-raw material that is not passed through the 115 and does not pass through the loading ramp plate 114, and adjusts the amount of vertical segregation of the micro-raw material passing through the slit bar 115 according to the detected amount of the micro-raw material appropriately As such, the device 1 is composed of an angle adjusting plate 15, an operating cylinder 17 and an ultrasonic level sensor 11 and the like.

That is, the angle adjustment plate 15 is inserted through the horizontal stage 14 and the first rotary pin 14a which are horizontally installed rearward from the uppermost slit bar 115 on the rear of the charging ramp plate 114. The upper end is rotatably assembled so as to adjust the amount of fine raw material segregated vertically on the trolley 111 through the slit bar 115 while turning to move toward or away from the rear side of the inclined plate 114, the angle control plate ( The width of 15 is equal to the width of the charging ramp plate 114.

And, the operation cylinder 17 for rotating the angle control plate 15 is a distance away from the rear from the first rotation pin 14a to which the angle control plate 15 is assembled, similar to the angle control plate 14. In the rear end is rotatably assembled via the second rotary pin 17, the rod end is connected to the rear of the angle control plate (15).

In addition, the ultrasonic level sensor 11 is installed so as to detect the amount of fine raw material from the lower portion of the inclination plate 114, the operation cylinder 17 assembled to the horizontal stage 14 on the basis of the detected measured value. To move forward and backward through the slit bar 115 through the slit bar 115 by adding or subtracting the installation angle of the angle adjusting plate 15 rotatably assembled so that the upper end is rotatable or away from the rear side of the charging ramp plate 114. Control the amount of fine raw materials loaded on the upper surface of the.

The ultrasonic level sensor 11 is preferably installed at a predetermined interval so as to detect the amount of fine raw material generated in front of the lower slit rod 15 of the charging ramp plate 114 and the slit rod 115 of the upper portion. .

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

As shown in Figs. 3 and 4 (a) and (b), when the bore 111 starts up, if the amount of cutting of the blended raw material is required in the post-layer detection rod 117 to meet the proper layering, the drum-type cutting The air outlet 110 is controlled by the number of revolutions required by the post-layer detection rod 117.

Accordingly, the blended material discharged downward in a substantial amount from the drum type extruder 110 flows down while hitting the upper surface of the charge inclined plate 114 is generated by the vibration motor 114a, then the charge inclined plate The fine raw material is cut out to form a vertical segregation through the plurality of slit bars 115 installed at the bottom of the 114.

The fine raw material that forms vertical segregation while passing between the intervals of the slit bar 115 composed of a plurality of round bars in a row is mostly spread on the surface layer of the bogie 111, and the initial setting value of the layer control is based on the mixing raw material particle size sampling result. For reference, according to the distribution of 5mm or less, the angle adjusting plate 15 of the present invention is manually input by the driver on the control screen, and then automatically switched.

Accordingly, the amount of fine raw material accumulated in the front lower portion of the charging ramp plate 114 without passing between the gaps of the slit bars 115 at the lower portion of the charging ramp plate 114 is lower than that of the upper part of the lower slit bar 115. The ultrasonic level sensor 11 is installed to correspond to the slit bar 115 at a predetermined interval.

The ultrasonic level sensor 11 measures the thickness change of the raw material layer for driving the upper surface of the slit bar 115. When the amount of the micro raw material is generated, the ultrasonic level sensor 11 does not pass between the intervals of the plurality of slit bars 115. The fine raw material is processed into the upper portion of the slit bar 115 is to thicken the entire layer of the charging raw material in the lower portion of the inclined plate 114.

At this time, if the data detected and output by the ultrasonic level sensor 11 increases or decreases by ± 3%, the amount of vertical segregation passing between the slit bars 115 of the charging ramp plate 114 can be adjusted based on this. A rotation operation of increasing and decreasing the angle tilting plate 15 by ± 2% is performed as the operation cylinder 17.

That is, when the amount of generation of the fine raw material layer increases and the thickness of the raw material layer becomes thicker than the initial set value, and the data detected by the ultrasonic level sensor 11 increases by 3%, it is perpendicular to the rear surface of the inclined charging inclined plate 114. By operating the operating cylinder 17 by 2% by the angle adjustment plate 15 in one state to rotate closer to the charging ramp plate 114 side to control to reduce the vertical amount. On the contrary, when the amount of generation of the fine raw material layer decreases and the thickness of the raw material layer becomes thinner than the initial set value, and the data detected by the ultrasonic level sensor 11 decreases by 3%, the angle rotated to the rear side of the inclined charging ramp 114 The control plate 15 is rotated to move toward the charge inclination plate 114 side by operating the operation cylinder 17 backward by 2% so as to increase the amount of vertical segregation.

Here, the angle adjusting plate 15 is always located in the range of 20 to 100% in the angle range formed between the inclined charging plate 114 and the vertical initial angle adjusting plate 15 perpendicular to the measured value of the ultrasonic level sensor. On the basis of the control of the vertical segregation of the fine raw material layer is controlled to perform the layer control, the determined angle of the angle adjustment plate 15 is applied to the post-layer detection rod 117 by the drum type extruder 110 Control the number of revolutions.

In addition, when the amount of generation of the fine raw material layer is small and the data obtained by synthesizing the five minutes in the ultrasonic level sensor 11 is not changed, the angle adjusting plate 15 is automatically reduced by 2% to constantly adjust the fine raw material layer. .

Example 1

The moisture content of the blended raw material was fixed at 7%, the average particle size was 2.7 to 2.8%, and the slit bar 115 of the charging ramp plate 114 was rotated to adjust the fine raw material to a predetermined height in the surface layer portion of the bogie 111. Sintering was carried out, and the firing rate calculated per minute after 30 minutes was investigated before and after the invention with an average of 10 minutes.

As a result, as shown in Table 1, the change in the conventional average firing speed without adjusting the layer of the micro raw material in the slit bar 115 is 17.93 mm / min, the average firing rate of the present invention in which the micro raw material layer is adjusted. Is 18.02mm / min, and the standard deviation is improved by 0.41.

division Firing speed (mm / min) Test 1 Test 2 Test 3 Average Standard Deviation Conventional 17.25 18.54 17.99 17.93 0.46 The present invention 18.02 17.95 18.09 18.02 0.05

As described above, when the fine raw material layer on the upper portion of the trolley 111 is adjusted and the unadjusted raw material is fired, the firing speed (flame forward speed) is compared, and the case of the fine raw material layer is adjusted. It can be seen that the stable firing rate has a great influence on the productivity and productivity.

Example 2

Table 2 shows the mixing ratio of iron ore and secondary materials such as limestone, silica, serpentine, quicklime and semi-ores and powdered coke.

ironstone Limestone Quartz sand Serpentine quicklime Semi-gloss Bunk coke 65.74% 8.37% 0.56% 0.88% 1.21% 19.4% 3.84%

Loading the blended raw material having the configuration shown in Table 2 to the balance 111, every 30 minutes, the time when the sintering is completed, the thickness of the fine raw material in terms of the angle in the angle control plate 15 expressed as a percentage by 30 minutes averaged 30 minutes The results of examining the air permeability are shown in Table 3 below.

division Test 1 Test 2 Test 3 Test 4 Test 5 Fine raw material layer (° / mm) 5 10 15 20 25 Breathability (Nm ³ / Min) 14725 14258 13561 13347 12973 division Test 6 Test 7 Test 8 Test 9 Test 10 Fine raw material layer (° / mm) 30 25 40 45 50 Breathability (Nm ³ / Min) 12246 12034 11848 11725 11582

From the above results, when the thickness of the fine material layer in the upper portion of the trolley 111 is thinly adjusted, the excess fine material changes the thickness of the inclination angle, resulting in loss of function of the slit bar 115 (blocking) in the vertical segregation. On the contrary, if the thickness of the fine raw material layer is adjusted thicker than the generated amount, the distribution of granulated particles in the surface layer portion of the trolley causes the cause of poor ignition and the occurrence of semi-glossy. This causes a change in the deterioration of air permeability, so that the floor control should be appropriately made according to the amount of fine raw material detected by the ultrasonic level sensor 11.

In addition, the air permeability changed according to the amount of fine raw materials was investigated by substituting the following equation 1 based on the air flow rate value shown in the sintering operation index.

Breathability Index (Nm ³ / min) = (Pass Rate / Wind Area) × (Post Layer / Suction Pressure) ^0.6

Accordingly, the amount of fine raw material generated by the slit bar 115 is detected as the ultrasonic level sensor 11, and the angle adjusting plate 15 is tilted to the rear side of the charging ramp plate 17 or vice versa based on the detected amount. By controlling the layer properly, minimizing the amount of change of the raw material layer, and the operation results obtained by manufacturing the sintered ore in the actual operation compared with the conventional results are shown in Table 4 below.

division Air volume (Nm ³ / Min) Drop strength (%) Fraction (%) Conventional 0.51 0.45 1.12 The present invention 0.27 0.24 0.53

As a result, as can be seen in Table 4, as a control device of the present invention, the production of sintered ore by controlling the amount of fine raw materials as compared with the conventional method can ensure that the deviation is uniformly ensured and the sintered ore quality can be stably discharged, and the productivity is significantly improved.

According to the present invention having the above-described configuration, the fine raw material generated in the sintering charging process is uniformly guided into the balance surface layer portion to ensure stable breathability, so that a uniform firing speed can be obtained in the continuous sintering method, which is excellent and uniform. It is possible to produce a sintered ore of a high quality, which can greatly contribute to the stability of the blast furnace furnace sulfur.

In addition, by evenly classifying the fine raw materials in the surface layer portion of the truck, it is possible to reduce the reflection of light generated in most surface layer portions, thereby improving the recovery rate and enhancing the competitiveness of external prices.

Claims (6)

A plurality of rod-shaped slit bars 115 are provided on the storage hopper 108 in which the blended raw material is stored, the drum-type cutting machine 110 for charging the blended raw material into the balance, and the inclined charging ramp 114 to induce vertical segregation. In the sintering machine to manufacture the sintered ore, An angle adjusting plate 15 rotatably mounted as a first rotary pin 14a so as to adjust a charge amount of the fine raw material on the horizontal stand 14 installed horizontally on the rear surface of the charging ramp plate 114; and An actuating cylinder (17) having a rear end rotatably assembled as a second rotary pin (17a) on the horizontal stage (14), and a rod end (17b) connected to a rear surface of the angle adjusting plate (15); Ultrasonic level sensor 11 for detecting the amount of generation of the fine raw material in the lower portion of the inclination plate 114, and controls the installation angle of the angle adjusting plate 15 by operating the operating cylinder 17 on the basis of the detected measured value. Micro raw material control device of the sintering apparatus comprising a. The method of claim 1, The ultrasonic level sensor 11 is installed with a predetermined interval so as to detect the amount of fine raw material generated in front of the lower slit rod 15 of the charging ramp plate 114 and the slit rod 115 of the upper portion. Fine raw material control device of sintering machine. The method of claim 1, The angle adjusting plate 15 is always positioned within the range of 20 to 100% in the angle range formed between the predetermined angled inclined plate 114 and the vertical initial angle adjusting plate 15 at a predetermined angle to measure the ultrasonic level sensor 11. A device for controlling a fine raw material of a sintering machine, characterized in that the layer control is performed by adjusting the vertical segregation amount of the fine raw material layer based on the value. The method of claim 1, The direction angle of the angle control plate 15 is applied to the post-layer detection rod 117 to control the rotational speed of the drum-type cutting machine 110, characterized in that the fine raw material control device of the sintering machine. The method of claim 1, When the data detected and output by the ultrasonic level sensor 11 increases or decreases by ± 3%, the angle to adjust the amount of vertical segregation passing between the slit bars 115 of the charging slope plate 114 is based on this. Fine material control device of the sintering machine, characterized in that the rotating operation to increase or decrease the inclined plate 15 by ± 2% as the operating cylinder (17). The method of claim 1, When the total data of 5 minutes in the ultrasonic level sensor 11 does not change, the angle control plate 15 is automatically reduced by 2%, thereby controlling the fine raw material layer, characterized in that the fine raw material of the sintering machine Regulator.