KR100836448B1 - Apparatus for manufacturing the sintered ore - Google Patents

Abstract

The present invention provides an upper light supply means for supplying the upper light on the sintered trolley, a blending raw material supply means for supplying a blended raw material on the upper light layer loaded on the sintered trolley, and a sintering raw material of the blended raw material loaded on the sintered trolley An apparatus for manufacturing a sintered ore in which an igniter for igniting and igniting a surface layer portion of a layer is sequentially provided along a traveling direction of the sintered trolley, wherein the upper light supply means includes an upper light storage tank for storing the upper light, and the upper light. And a drum type breaker provided below the reservoir, and an induction chute for guiding the upper light cut out from the upper light storage tank by the rotation operation of the drum type breaker to the sintering cart. The speed is adjusted according to the loading density of the sintered raw material layer loaded on the upper light layer to vary the height of the upper light layer. Since it is characterized in that the key material, the poor breathability of the sintered raw material layer due to the increase in density of the sintered raw material layer due to the unstable elements of the raw material and moisture of the blended raw material is eliminated to prevent the emission of red light, the quality and productivity of the sintered ore Can improve.

Drum type cutting machine, density measuring instrument, height variable, control operation part

Description

Apparatus for manufacturing the sintered ore}             

1 is a view schematically showing a general sintering process:

2 is a view showing a state in which a compounding material is charged in the sintering cart of the sintering machine.

3 is a view illustrating a process of forming a sintered ore in a sintering machine;

4 is a graph showing a temperature distribution according to a formation state of the sintered ore shown in FIG. 3 as a distance from ignition;

5 is a view showing a process of forming a sintered ore in the sintering machine according to the present invention;

FIG. 6 is a graph showing a temperature distribution according to a formation state of the sintered ore shown in FIG. 4 as a distance from ignition;

7 is a view illustrating a process in which a sintering process is performed according to the present invention;

8a to 8d is a view showing a sintered ore manufacturing process according to the present invention.

<Description of Symbols for Major Parts of Drawings>

6: upper light storage tank

15: control operation unit

16: upper light layer                 

19: thermometer

21: density measuring device

22: ultrasonic measuring instrument

23: drum type cutting machine

24: judo suit

25: guide suit

The present invention relates to a device for producing a high quality sintered ore by improving the air permeability of the sintered raw material layer charged in the sintered bogie, and more particularly, the uncut unstable cutting of lime and limestone, which is fuel coke or an auxiliary raw material in the raw materials of the sintered ore manufacturing process Or it relates to a sintered ore manufacturing apparatus for varying the height of the upper light so as to prevent the air permeability of the sintered raw material layer is deteriorated by the abnormal mixing of the raw material.

In general, the sintered ore manufacturing process as shown in Figure 1 in the raw material storage tank (1) quantitatively cut and blended the iron ore and fuel coke. In addition, as a catalyst for improving the chemical reaction during the sintering process, limestone, silica sand, serpentine, and the like are used. In recent years, quicklime is added to improve granulation of raw materials.

As shown in FIG. 2, the raw material for sintering is formed by mixing and assembling the raw materials while adding an appropriate amount of water in the mixer 2 and the granulator 2-1. As shown in FIG. 9) is charged into the sintered trolley | bogie 3-1. The sintered raw material layer charged into the sintered bogie 3-1 is ignited and ignited while passing through the ignition furnace 5. While the sinter truck 3 advances the effective burn distance, air is sucked downward through the wind box 18 provided below the sinter machine 3 by the suction action of the main blowers 7 and 7-1. In the sintered raw material layer to be burned, dry wet zone 4-1 and sintered zone 4 are formed, and finally, sintered ore is produced.

In the process of manufacturing the sintered ore, when the compounding compound blended normally is loaded into the sintering trolley, as shown in FIG. 3, the sintered raw material layer is composed of the dry wet zone 4-1, the sintered zone 4-2, and the like. , The area of the cooling zone (4). Referring to Figure 4, the sintering completion point (BTP) in the temperature distribution for each region measured in the windbox is made in the windbox 18 of 21 to 23 located at the end of the effective image distance of the sinter bogie, Since normal cooling takes place afterwards, it is possible to prevent the emission of red light and to ensure good quality of the sintered ore. Thus, the driver secures good production efficiency of the sintered ore while decelerating the sintering machine speed while looking at the completion point BTP.

However, as shown in FIG. 5 in the sintering ore manufacturing process, due to the factor factors 20 such as unstable cutting and particle size defect of the fuel coke, unstable cutting of the subsidiary materials, and poor water control in the mixer and rerolling, It causes poor breathability of the sintered raw material layer. That is, as shown in FIG. 5 and FIG. 6, the sintering operation is delayed while the wet zone 4-1 and the sintering zone 4-2 are extended, and as a result, a large amount of red light is emitted or the top light height is increased. Inaccurate setting may cause problems in subsequent equipment, cause air pollution due to unstable combustion during firing, or reduce productivity of sintered ore.

The present invention has been made in order to solve the conventional problems as described above, the first charging step of the sintered ore manufacturing step by tracking the cutting failure due to the abnormal control of the urea factors that increase the density in the blending raw material charged in the sintering cart of the sintering machine It is an object of the present invention to provide a sintered ore manufacturing apparatus capable of varying the height of the upper light of the lower layer of the sintered trolley by measuring the accurate density at.

In order to achieve the above object, according to the present invention, the upper light supply means for supplying the upper light on the sintered trolley, the compounding raw material supply means for supplying a blending raw material on the upper light layer loaded on the sintered trolley, and the sintering In the sintered ore manufacturing apparatus in which an igniter for igniting and igniting the surface layer of the sintered raw material layer of the blended raw material loaded on the trolley is sequentially installed along the traveling direction of the sintered trolley, the upper light supply means stores the upper light. A storage tank, a drum type breaker provided below the upper light storage tank, and an induction chute for guiding the upper light cut out from the upper light storage tank by the rotational operation of the drum type cutting machine to the sintering cart. The rotational operation speed of the die cutting machine is controlled according to the loading density of the sintered raw material layer loaded on the upper light layer. It characterized in that varying the height of the auxiliary optical line layer.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention, the same configuration will be assigned the same reference numerals.

According to the present invention, a sintered ore manufacturing apparatus having a feedback system for measuring, calculating, and controlling field data in real time includes: an upper light supply unit sequentially installed along a moving direction of the sintering cart 13-1, and a blended raw material; It has a supply means and an igniter.

The blended raw material supply means has a blended raw material storage hopper (9), drum feeder (10) and inclined chute. The compounding material discharged from the compounding raw material storage hopper 9 by the rotation of the drum feeder 10 is loaded on the upper light layer 16 of the lower layer of the sintered trolley 3-1 described below by the inclined chute.

The upper light supply means has an upper light reservoir (6) and a drum-type cutting machine (23) provided below the upper light reservoir (6). According to the rotational speed of the drum-type cutting machine 23, the amount of cutout of the upper light cut out from the upper light storage tank 6 is adjusted so that the height of the upper light loaded on the sintered trolley 3-1 is varied. In addition, an induction chute 24 and a guide chute 25 are provided below the drum-type plunger 23 to evenly distribute the upper light extracted from the upper light storage tank 6 to the sintering cart 3-1.

On the other hand, the rotational operation of the drum-type extruder 23 is controlled in accordance with the density of the compounding material loaded on the upper light layer 16 by the compounding material supply means. That is, the rotational operation of the drum-type extruder 23 is controlled by the density data of the blended raw material provided from the density measuring device 21 which can monitor whether the blended raw material loaded on the upper light layer 16 is abnormal. do. The data provided from the density measuring device 21 is collected by the control operation unit 15 and then fed back to the drum type extruder 23, and the upper light layer 16 which is varied by the variable operation of the drum type extruder 23. The height of is measured by the ultrasonic meter 22.

The drum type cutout 23 which varies the amount of cutout of the upper light is installed in the width direction of the sintered trolley 3-1 at the lower part of the upper light storage tank 6, and the rotational speed of the drum type cutout 23 is a drive motor. (Not shown). That is, according to the present invention, by varying the rotational speed of the drum-type cutting machine 23 by the drive motor, the amount of cutout of the upper light cut out from the upper light reservoir 6 can be varied.

Conventionally, only the temperature was measured by the thermometer 19 provided in the windbox of the rear stage, and the density of the sintered raw material layer could not be measured. In the present invention, the density measuring unit 21 is installed in the wind box corresponding to the initial sintering time point to accurately measure the density of the sintered raw material layer. The density data measured at the density meter 21 is calculated by the transducer 14 and then provided to the control operation unit 15. In the control operation unit 15, the height of the upper light layer 16 can be varied by varying the rotational speed of the drum type cutter 23 by a program input in advance. After accurate measurement in the ultrasonic measuring device 22, it was provided to the control operation unit (15).

Therefore, the rotational speed of the drum-type extruder 23 when the compounding material prepared based on the unstable cutting of the raw coke and the subsidiary materials and the unstable factor factors 20 such as a poor control of the mixer and the re-rolling moisture is loaded into the sintering cart. Variable operation is performed as follows.                     

First, when the sintering cart 3-1 of the sintering machine is started, the drum type cutter 23 starts at a rotational speed corresponding to the height of the upper light layer initially input to the control operation unit 15. The rate of change is calculated by the following equation 1, which represents the relationship between the height of the input upper light layer 16 and the temperature measured by the thermometer 19 installed in the windbox at the rear end.

Rate of change = [Upper layer height ÷ temperature measured by thermometer] × 100 (1).

And the change rate computed by said Formula 1 is compared with a temperature reference value, for example, 70 degreeC, and the deviation is computed by following formula (2).

Calculation of deviation = [reference value 70 ℃-rate of change] ‥‥‥‥ (2).

In this case, the temperature reference value means the temperature measured by the thermometer 19 installed in the rear wind box when the quality and productivity of the sintered ore in the sintering operation is good, and the temperature reference value is 70 ° C based on the sintering operation. Calculation was made.

During the sintering operation, if the fuel raw material programmed in the control operation unit 15 and the unstable cutting element of the water fluctuation occur, the density measuring unit 21 installed in the wind box corresponding to the installation position of the igniter 5 is generated. The loading density of the sintered raw material layer is measured, and the data is calculated in the converter 14 and then provided to the control operation unit 15.

The control operation unit 15 calculates the deviation calculation value calculated by Equation 2 above, and the height of the upper light layer 16 that can satisfy the fluctuations of the raw material and the moisture fluctuation suitable for the sintering operation. This calculated value is fed back to the drum type extruder 23 to vary the rotational speed of the drum type extruder 23 to adjust the discharge of the upper light emitted from the upper light reservoir 6.                     

The variable rotation speed of the drum-type extruder 23 is based on the deviation calculation value calculated by Equation 2 above and the density measured by the density measuring unit 21. For example, if the deviation value shows a change of ± 10 ° C, the height of the upper light layer is changed to about 10mm, and the height of the upper light layer is ± 10mm when the loading density value of the sintered raw material layer shows a change of ± 0.1 based on 1.90. To varying degrees.

However, in order to keep the height of the upper light layer constant, the height variable width was set to a minimum of 50mm to a maximum of 100mm.

Then, when the variable condition as described above is satisfied, the variable rotation speed of the drum type extruder 23 is made to satisfy the condition of Table 1 input to the control operation unit 15.

TABLE 1

Upper light layer height (mm) Cutting machine rotation speed (rpm / min) 60 1.5 to 1.6 70 1.7 to 1.8 80 1.9 to 2.0 90 2.1 to 2.2 100 2.3 to 2.4

While satisfying the conditions shown in Table 1 above, the height of the upper light layer is automatically changed and the data of the variable height measured continuously by the ultrasonic measuring device 22 are calculated by the transducer 14 and then provided to the control operation unit 15. do. The control operation unit 15 continuously feeds back this data to the drum type extruder 23.

On the other hand, since the distance from the ultrasonic measuring device 22 to the density measuring device 21 is about 20 m, a delay time of about 0 to 15 minutes is set in consideration of such a separation distance, and all the controls are controlled continuously and automatically. .

Hereinafter, the phenomenon according to the situation of a sintering operation is demonstrated with reference to FIGS. 8A-8D which showed the cross section in the sintering machine light distribution part.

First, as shown in FIG. 8A, when the area of the cooling zone 4 (A) is relatively small and the thickness of the sintering zone (baking zone) 4-2; B is relatively thick, This means that the charging density is increased, resulting in poor plastic working and red light emission. Therefore, in such a case, the height of the upper light layer 16 is increased to decrease the loading density of the sintered raw material layer, thereby improving air permeability.

8B and 8C show distributions for each part that appear when the loading density of the sintered raw material layer is sequentially lowered to solve the poor sintering operation condition of FIG. 8A.

In addition, as shown in FIG. 8D, when the area of the cooling zone (A) is large while the area of the sintering zone (baking zone; B) is narrow, the air permeability of the sintered raw material layer is very good. The height of the optical layer 16 (C) is maintained at 50 mm, which is the minimum value of the set value, and as a result, a relatively large amount of compounding material is charged to improve the sintering productivity and the quality of the sintered ore.

According to the present invention, by varying the height of the upper light layer according to the density of the sintered raw material layer, the air permeability defect of the sintered raw material layer due to the increase in density of the sintered raw material layer caused by the unstable elements of the raw material and moisture of the blended raw material is eliminated. Thus, the emission of red light can be prevented and the quality and productivity of the sintered light can be improved.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains recognize that modifications and variations can be made to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. shall.

Claims (3)

Upper light supply means for supplying the upper light on the sintered trolley, the compounding raw material supply means for supplying the blended raw material on the upper light layer loaded on the sintered trolley, and the surface layer portion of the sintered raw material layer of the blended raw material loaded on the sintered trolley In the sintered ore manufacturing apparatus in which an igniter for igniting and igniting is sequentially installed along the traveling direction of the sintered trolley, The upper light supply means includes an upper light storage tank for storing the upper light, a drum type breaker provided below the upper light storage tank, and an upper light cut out from the upper light storage tank by a rotation operation of the drum type extractor. Consists of an induction chute leading to the sintered bogie, The rotational operation speed of the drum-type cutting machine is controlled by the density data of the blended raw material provided from the density measuring device capable of monitoring whether or not abnormal cutting is loaded on the upper light layer to vary the height of the upper light layer. Sintered ore manufacturing apparatus made into. The method of claim 1, The charging density of the sintered raw material layer is sintered ore manufacturing apparatus characterized in that it is measured by a density meter installed adjacent to the wind box of the lower portion of the sinter bogie corresponding to the installation position of the igniter. The method of claim 1, Sintered ore manufacturing apparatus, characterized in that the height measuring device for measuring the height of the upper light layer in front of the drum-type cutting machine in the traveling direction of the sintered cart.

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