KR100931236B1 - Uniform particle size control device of sintered fuel and its method - Google Patents

Abstract

The present invention relates to a particle size uniformity control apparatus and method of the sintered fuel,

The present invention comprises a dispensing means for discharging a predetermined amount of fuel from the surge hopper 105 to transport and charge the rod mill 106 through the transport belt 104; Particle size analysis means for analyzing the particle size of the fuel by installing the fuel charged by the dispensing means on an upper portion of the transport belt 104 for transporting the fuel to the separator 103; Control means for generating a control signal by comparing and analyzing the particle size analysis value sent from the particle size analyzing means with a preset setting value; Inside the rod mill, a classifier 120 having small and medium mats having different sizes of holes is installed, and the vertical angle of the classifier is adjusted according to a control signal of the control means to obtain a uniform particle size of fuel. The control means; to the gist.

Classifier 120, direction supporter 106g, power carrier 106e, particle size analyzer 111

Description

Uniform particle size control device of sintered fuel and its method {APPARATUS AND METHOD FOR CONTROLING PUSHING DENSITY OF SINTERED FUEL}

1 is a process diagram schematically showing a conventional fuel crushing flow.

2 is a block diagram of a particle size uniformity control apparatus for sintered fuel according to the present invention.

3 is a detailed view of the disperser 110 and the classifier 120 of FIG. 2.

4 is a flowchart showing a method for controlling particle size uniformity of sintered fuel according to the present invention.

5 is a correlation graph of the average particle size and the adjustment angle of the fuel according to the present invention.

Explanation of symbols on the main parts of the drawings

104: transport belt 105: surge hopper

106: road mill 109: discharge chute

110: disperser 111: particle size analyzer

120: classifier 200: controller

100: fuel storage bin 101: basis weight belt

102: roll crusher 103: sorting machine                 

107: Ore Bin

The present invention relates to a uniform particle size control apparatus and method of the sintered fuel, in particular, the fuel stored in the surge hopper is charged to the load mill through the discharge chute, wherein the charging position according to the particle size is determined by the action of the disperser and the classifier, The charged fuel is crushed and loaded on the transport belt. At this time, the controller compares the particle size analysis value and the set value through the particle size analyzer, and adjusts the up and down angle of the rod mill according to the comparison result to obtain a uniform particle size of the fuel. And a particle size uniformity control apparatus for sintered fuel capable of producing a high quality product even in a high production operation situation and a method thereof.

In general, the sintered ore is manufactured by mixing various raw materials such as spectroscopy of less than 10 mm, chemical ingredients such as limestone, silica sand, serpentine, and fuel (anthracite coal, powdered coke) as a heat source and then sintering machine (not shown). ) And ignited in an ignition furnace (not shown) to be sucked downward to produce sintered ore.

This process is repeated to produce sintered ore, but the quality deviation of the sintered ore is greatly generated according to the particle size distribution of the fuel. That is, when the particle size distribution of the fuel is less than 1 mm on average, it burns quickly during the sintering process, and thus the time for holding heat is shortened, thereby preventing the sintered ore from being properly sintered. On the other hand, when the particle size distribution of the fuel exceeds 3 mm on average, the time for retaining heat during the sintering process becomes long, and thus, the sintered ore is oversintered, resulting in disruption in the production of sintered ore of appropriate quality.

In this way, the particle size of the fuel in the sintering should be maintained uniformly 1 ~ 3mm to produce the sintered ore of the appropriate quality. Therefore, in the current sintered ore manufacturing process, the particle size of the fuel is used to provide a fuel crushing device to match 1 ~ 3mm, but it is difficult to match the particle size of 1 ~ 3mm due to the extreme deviation. That is, the fuel shredding device refers to the rod mill 106, which includes a plurality of rods 106h (constant size rods) contained in a cylindrical cylinder, and at the same time the fuel is loaded into the cylinder, and the rod mill 106 is loaded. This rotation causes the plurality of inserted rods 106h to rotate in the cylinder together. In other words, by the action of the rod mill 106 rotating in a predetermined direction, the rod 106h contained in the rod mill 106 rotates and falls simultaneously, and the fuel charged by the rubbing action is crushed.

However, in the present operation, the crushing degree of fuel is simply adjusted by adjusting the amount of fuel charged into the rod mill 106 and adjusting the number of rods 106h inserted into the rod mill 106 at regular repairs. As a result, it is difficult to achieve uniform particle size (1 ~ 3mm) of continuous fuel, and it is difficult to obtain fuel with uniform particle size when high production operation is carried out.

The present invention has been made to solve the above problems, an object of the present invention is the fuel stored in the surge hopper is charged to the load mill through the discharge chute, the charging position according to the particle size is determined by the action of the disperser and classifier The charged fuel is crushed and loaded on the transport belt. At this time, the controller compares the particle size analysis value and the set value through the particle size analyzer, and adjusts the up and down angle of the rod mill according to the comparison result, thereby improving the uniform particle size of the fuel. The present invention provides an apparatus and a method for uniformly controlling the particle size of a sintered fuel which can be obtained and can produce a high quality product even in a high production operation situation.

As a technical means for achieving the above object of the present invention, the first feature of the present invention is a dispensing means for discharging a predetermined amount of fuel from the surge hopper to transport it into the load mill through the transport belt; Particle size analyzing means for analyzing the particle size of the fuel by installing the fuel charged by the dispensing means on an upper portion of the transport belt for transporting the fuel to the separator; Control means for generating a control signal by comparing and analyzing the particle size analysis value sent from the particle size analyzing means with a preset setting value; An up and down adjusting means for installing a classifier having small and medium mats having different sizes of holes in the rod mill, and adjusting a vertical angle of the classifier according to a control signal of the control means to obtain a uniform particle size of fuel; It is provided to provide a particle size uniformity control device of the sintered fuel.

In addition, as another technical means for achieving the above object of the present invention, the second feature of the present invention is to discharge the fuel of the surge hopper to the load mill, and then to the load mill through the transport belt, discharge chute and disperser and A method for controlling particle size uniformity of fuel for uniformly controlling the particle size of discharged fuel, the method comprising: a first step of dispersing the fuel in a disperser through a discharge chute; A second step of charging the dispersed fuel into the rod mill by size through a classifier; A third step in which the fuel charged in the rod mill is crushed by the rod and then discharged through a discharge outlet, loaded on a transport belt, and subjected to particle size analysis; A fourth step of sending the particle size analyzed value to a controller and comparing and analyzing the output value and the set value by the controller; A fifth step of adjusting, by the controller, the up and down adjustment cylinder so that the output value is equal to the setting value based on the setting value; While the above steps are continuously executed and controlled, if the output value is different from the set value in the fourth step, the fifth step is performed, and the granularity analysis of the third step takes a predetermined time delay, and again A sixth step of detecting and analyzing a time delay average value, the sixth step of performing feedback control such that each set value is equal to a set value and an output value; In the sintering characterized in that it comprises a fuel particle uniformity control method.

EMBODIMENT OF THE INVENTION Hereinafter, the structure and effect | action of the particle size uniformity control apparatus of the sintering fuel which concern on this invention are demonstrated in detail with reference to an accompanying drawing. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

FIG. 2 is a block diagram of a particle size uniformity control apparatus for sintered fuel according to the present invention. Referring to FIG. Dispensing means for discharging and transporting and loading the rod mill 106 through the transport belt 104, and installed on the upper portion of the transport belt 104 for transporting the fuel charged by the dispensing means to the sorter 103, the fuel Particle size analysis means for analyzing the particle size of the control means; a control means for generating a control signal by comparing and analyzing the particle size analysis value sent from the particle size analysis means with a preset setting value; It is provided with a classifier 120 having a small and medium mat, and the vertical adjustment means for adjusting the vertical angle of the classifier according to the control signal of the control means to obtain a uniform particle size of the fuel. The.

3 is a detailed view of the disperser 110 and the classifier 120 of FIG. 2. Referring to FIG. 3, the dispensing means adjusts the amount of fuel discharged from the surge hopper 105. ), A transport belt 104 for transporting the discharged fuel, a discharge chute 109 for charging the fuel transported by the transport belt 104 to the rod mill 106, and a dispersion plate 110b. And a fixing rod (110c) having a circular pipe shape and a fixing body (110a) for fixing the dispersion plate (110b) to the fixing rod (110c). , Driver 120a, guide plate 120b, large mat 120c, middle mat 120d, sleeve 120e, rectangular plate and composed of guide plate 120f with elastic member attached to the upper surface And an inclination angle to form a flow of logistics, and includes a classifier 120 for determining a charging position according to fuel.

The up and down adjusting means includes a girth gear 106a formed on the circumferential surface of the rod mill 106, a pinion gear 106b engaged with the girth gear 106a of the rod mill 106, and the pinion gear 106b. ) Is installed in the driver 106c for rotating the rod mill 106, the bearing 106d provided at one end of the pinion gear 106b, and the support portion of the driver 106c and the bearing 106d. And a transfer body 106e for transmitting the up and down force, a vertical adjustment cylinder 106f which is adjusted up and down by the control signal of the controller 200, and a rod mill 106 which is moved up and down by the cylinder 106f. Direction 106c for fixing and supporting the central portion of

The particle size analysis means includes a particle size analyzer 111, the particle size analyzer 111 is loaded when the fuel discharged through the discharge port 106i of the rod mill 106 is loaded on the transport belt 104 The particle size of the fuel is analyzed, and an average value thereof is derived and provided to the control means.

The guide plate 120b is attached to both ends of the guide plate 120f, the sleeve 120e, the middle mat 120d, and the large mat 120c, and the sleeve 120e and the middle mat. 120d and the large mat 120c are general screens, and large and small are distinguished by the size of a hole. The size of the hole is configured based on 1 ~ 3mm (average: 2mm).

4 is a flowchart showing a method for uniformly controlling the particle size of the sintered fuel according to the present invention, and FIG. 5 is a correlation graph of the average particle size and the adjustment angle of the fuel according to the present invention.

Operation of the preferred embodiment of the present invention configured as described above will be described in detail below based on the accompanying drawings.

In the present invention, the fuel of the surge hopper 105 is discharged to the load mill 106, and then the particle size of the fuel charged and discharged to the load mill 106 through the transport belt 104, discharge chute 109 and the disperser. To uniformly control the particle size of the fuel to uniformly control, first, the first step (S211-S216) is the fuel is dispersed in the disperser 110 through the discharge chute 109, this dispersion process is the discharge process of the fuel In this case, the dispensing process will be described as follows.

Referring to the dispensing process, this dispensing process is made by the dispensing means. That is, the fuel discharged by the discharge feeder 108 is transported by the transport belt 104, and the transported fuel passes through the disperser 110 through the discharge chute 109. At this time, the fuel is evenly distributed from side to side, and the dispersed fuel falls on the classifier 120.

Then, in the second step (S217) the dispersed fuel is charged into the rod mill 106 by size through the classifier 120, at which time, the falling fuel first falls to the end of the guide plate (120f) and At the same time, the action of the guide plate 120f and the vibration of the driver 120a moves on each mat. The small size (1 mm) is classified in the sleeve 120e according to the size of the fuel, and thus the inside of the rod mill 106. The medium size (2mm) is classified in the medium mat (120d) and charged into the rod mill 106, and the large size (3mm) is classified in the large mat (120c) and the size is 3 mm or less. Is charged closer to the outlet 106i of the rod mill 106, and a size of 3 mm or more is charged farther from the outlet 106i of the rod mill 106. As a result, the fuel of a larger size than the small size stays in the rod mill 106 for a longer time and is crushed again.

Next, in the third step (S218), the fuel charged in the rod mill 106 is crushed by the rod and then discharged through the discharge outlet 106i, loaded on the transport belt 104 to perform particle size analysis. In this case, the particle size analyzer analyzes the fuel input level and provides the particle size analysis value to the control means.

Next, in the fourth step S219, the particle size analyzed value is sent to the controller 200, and the controller 200 compares the output value with the set value, where the control means is determined by the input analysis means. Compare and analyze the analyzed granularity and the preset granularity.

Next, in the fifth step S220-S223, the controller 200 adjusts the up / down adjustment cylinder 106f so that the output value is equal to the setting value based on the setting value, that is, when the output value is larger than the setting value ( When the particle size is larger than the set value), the vertical adjustment cylinder 106f is pulled to adjust the angle of the rod mill 106 more gently.

In other words, the fuel staying time inside the rod mill 106 becomes long. If the output value is smaller than the set value (when the particle size is smaller than the set value), the vertical adjustment cylinder 106f is pushed in contrary to the above to adjust the angle of the rod mill 106 to a larger angle of inclination. In other words, the fuel staying time inside the rod mill 106 is shortened. In addition, the above-described particle size analysis value usually uses an average value of 5 (2) minutes, and after comparing the average value and the set value, the up and down adjustment cylinder 106f performs up and down adjustment, and the output value thereof is 5 (2) minutes. It would be desirable to take a 5 (2) minute average after having DELAY. The DELAY of 5 (2) minutes is a value derived from a general sintering operation, but may vary depending on the size of the rod mill 106 and the like.

Next, in the sixth step S230, while the above steps are continuously executed and controlled, if the output value is different from the set value in the fourth step, the fifth step is performed, and the particle size analysis of the third step is performed. Is a third and fourth steps of taking a time delay set in advance, and detecting and analyzing the average time delay, and performing feedback control so that each of these steps is equal to the set value and the output value.

In order to confirm the effects of the present invention as described above, first observed by adjusting the up and down angle of the rod mill 106 by 0.5, the results are shown in Table 1 below. (The fuel used in the experiment was specially selected using an average particle size of 3 mm.) In addition, the average value of 5 (2) minutes was shown after 5 minutes (2) minutes after the delay after the rod mill angle was given.

division Adjustable angle (°) Average particle size (mm) Remarks Test 1 4.00 2.84 Reference angle: 3 ° Test2 3.50 2.42 Test 3 3.00 2.00 Test 4 2.50 1.58 Test 5 2.00 1.16

As such, it was found that the average particle size was correlated with the adjustment angle. In other words, it can be seen that the average particle size derived when the reference angle is increased by 0.5 from the top of the reference angle 3 increases gradually. On the contrary, the average particle size derived by decreasing the unit by 0.5 from the reference angle 3 decreases gradually. Based on these results, the results of experiments to confirm the relationship between the average particle size and the control angle were shown in Table 2 below.

division Adjustable angle (°) Average particle size (mm) Remarks Test 1 3.80 5.70 . Test2 3.50 5.56 Test 3 3.00 5.29 Test 4 2.50 4.73 Test 5 2.20 3.89 Test 6 2.00 2.49 Test 7 1.90 1.09 Test 8 1.85 0.25

In this way, it can be seen that there is a proportional relationship between the adjustment angle and the average particle size, and the correlation can be derived by regression analysis of the relationship, which is expressed by Equation 1 below.

[Equation 1]

y = -2.796x + 10.877

Where y = mean particle size (mm), x = adjustment angle (°)

Through the above correlation, the controller 200 can automatically control the up and down angle of the rod mill according to the derived average particle size value.

According to the present invention as described above, the fuel stored in the surge hopper is charged to the load mill through the discharge chute, the charging position according to the particle size is determined by the action of the disperser and the classifier, the charged fuel is crushed to the transport belt At this time, the controller compares the particle size analysis value and the set value through the particle size analyzer and adjusts the up and down angle of the rod mill according to the comparison result, so that the uniform particle size of the fuel can be obtained, and even in a high production operation situation, Can produce products.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (6)

Dispensing means for discharging a predetermined amount of fuel from the surge hopper 105 and transporting and charging the rod mill 106 through the transport belt 104; Particle size analysis means for analyzing the particle size of the fuel by installing the fuel charged by the dispensing means on an upper portion of the transport belt 104 for transporting the fuel to the separator 103; Control means for generating a control signal by comparing and analyzing the particle size analysis value sent from the particle size analyzing means with a preset setting value; And Inside the rod mill, a classifier 120 having small and medium mats having different sizes of holes is installed, and the vertical angle of the classifier is adjusted according to a control signal of the control means to obtain a uniform particle size of fuel. Adjusting means; And a particle size uniformity control device for sintered fuel. The method of claim 1, wherein the dispensing means A discharge feeder 108 for controlling an amount of fuel discharged from the surge hopper 105; A transport belt 104 for transporting the discharged fuel; A discharge chute (109) for charging the fuel transported by the transport belt (104) to the load mill (106); Including a dispersion plate 110b and a fixed rod 110c which is a circular pipe, and a fixed body 110a for fixing the dispersion plate 110b to the fixed rod 110c, a wrinkle shape is added to the fan shape. Disperser 110; The driver 120a, the guide plate 120b, the large mat 120c, the middle mat 120d, the sleeve 120e, and a rectangular plate are integrally formed with an induction plate 120f having an elastic member attached thereto. Forming an inclination angle so that the flow of logistics is formed, the classifier 120 for determining the charging position according to fuel; Particle size uniformity control device of the sintered fuel, characterized in that it comprises a. According to claim 1, wherein the vertical adjustment means Gus gear (106a) formed on the circumferential surface of the rod mill 106; The pinion gear 106b meshing with the girth gear 106a of the rod mill 106, A driver (106c) for rotating the rod mill (106) by driving the pinion gear (106b); A bearing 106d installed at one end of the pinion gear 106b; A transmission body (106e) installed at the support portion of the driver (106c) and the bearing (106d) to transmit a vertical force; A vertical adjustment cylinder 106f which is adjusted up and down by a control signal of the control means; A direction supporting member (106g) for fixing and supporting a central portion of the rod mill (106) moved up and down by the cylinder (106f); Particle size uniformity control device of the sintered fuel, characterized in that it comprises a. The method of claim 1, wherein the particle size analysis means It includes a particle size analyzer 111, The particle size analyzer 111 of the above When the fuel discharged through the discharge port 106i of the rod mill 106 is loaded on the transport belt 104, the particle size of the loaded fuel is analyzed and the average value is derived and provided to the control means. Fuel particle uniformity control device. The fuel of the surge hopper 105 is discharged to the rod mill 106, and then the particle size of fuel charged and discharged to the rod mill 106 through the transport belt 104, the discharge chute 109 and the disperser is uniformly controlled. In the particle size uniformity control method of the fuel for A first step (S211-S216) of dispersing the fuel in the disperser (110) through the discharge chute (109); A second step (S217) in which the dispersed fuel is charged into the rod mill 106 by sizes through the classifier 120; A third step (S218) in which the fuel charged in the rod mill 106 is crushed by the rod and then discharged through the discharge port 106i, loaded on the transport belt 104, and subjected to particle size analysis; A fourth step (S219) of sending the particle size analyzed value to the controller 200 and comparing and analyzing the output value and the set value by the controller 200; A fifth step (S220-S223) of adjusting the vertical angle of the rod mill 106 by adjusting the vertical adjustment cylinder 106f so that the output value is equal to the setting value by the controller 200; While the above steps are continuously executed and controlled, if the output value is different from the set value in the fourth step, the fifth step is performed, and the granularity analysis of the third step takes a predetermined time delay, and again A sixth step (S230) of performing feedback control such that the set value and the output value are the same as each of the third and fourth steps of detecting and analyzing a time delay average value; In the fifth step, the vertical angle of the rod mill 106 is calculated from the linear relationship between the adjustment angle of the rod mill 106 and the average particle size of the fuel, the particle size uniformity of the sintered fuel Control method. The method of claim 5, In the fifth step, the vertical angle of the rod mill 106 is calculated from the equation y = -2.796x + 10.877, where y = average particle size of the fuel (mm), x = adjustment of the rod mill 106 It is an angle (degree), The particle size uniformity control method of sintered fuel.

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