EA027450B1 - Method for adjusting the conveying speed of the material to be sintered in a sintering machine and regulator therefor - Google Patents

Abstract

For adjusting the burn-through point (D) in a sintering machine (1), in which the material to be sintered is charged onto a conveying path (3), ignited and transported past windboxes (6) arranged in conveying direction (F) up to a material dump (5), the temperature is measured at at least three measurement points (10) consecutively arranged along the conveying path (3) and the conveying speed of the sintering machine (1) is adjusted in dependence on the position of the maximum measured temperature (D(i)) relative to the position of the selected burn-through point (D) on the conveying path. The profile of the temperature of three consecutively arranged measurement points (10) is compared, wherein a maximum of the temperature is assumed when the first and third measurement points (10) in conveying direction (F) have a lower temperature value than the second measurement point (10), and wherein no maximum of the temperature is assumed when all measurement points (10) form an ascending series of temperature values. With an assumed maximum of the temperature, the conveying speed is adjusted in dependence on a deviation between the position of the measurement point with the maximum temperature value (D(i)) and the position of the selected burn-through point (D), whereas with no assumed maximum of the temperature the conveying speed is reduced by a specified value.

Description

The invention relates to a method and control device for regulating an agglomeration point in an agglomeration machine. In an agglomeration machine, an agglomerable material, which, for example, contains ores, is loaded onto a conveyance path, for example, a moving grate or a grate cart, ignited and transported along air ducts located in the transport direction and operating in the suction mode to the material dump. During transportation in an agglomeration machine, the agglomerated material is burned to form an agglomerate, at the end of the agglomeration machine they are discharged near the material dump, for example, by raking and fed to subsequent processes. In the method for controlling the agglomeration point, the temperature is determined using the temperature of the agglomerated material at least three measurement points located one after the other along the transport path, and the transport speed of the agglomeration machine is controlled depending on the position of the maximum measured temperature relative to the position of the previously selected agglomeration point on transportation ways.

During the agglomeration, most of the granular or powdery substances are combined with each other by heating. Heating is carried out by igniting the surface of the material in an agglomeration machine following the introduction of the material. The ignited material is then transported in an agglomeration machine in which material ignited on its surface burns along the entire height of the agglomerated material. At the point of agglomeration, in which the entire layer has just burned out in the vertical direction, the temperature measured near the air box is maximum. After that, the agglomerated material is already cooled during further transportation in an agglomeration machine.

It is usually required that the sintering be completed at the end of the sintering machine or immediately before the end of the sintering machine. In any case, however, it is necessary to avoid that the agglomeration process is not yet completed when the material is unloaded and that the agglomeration process takes place at subsequent cooling stations, which can be damaged by heat generated during the agglomeration. In addition, it is necessary to avoid that the agglomeration point in the machine is reached too early, as this leads to less production.

To avoid this, when adjusting the agglomeration point, the temperatures near the air ducts are taken into account, especially in the last quarter of the agglomeration machine, in order to determine the agglomeration point. In this method, the maximum temperature value is determined from the measured temperatures, and the agglomeration point is determined from it. By comparison, it is determined in which of the air ducts the maximum temperature value exists. This position is compared with the pre-selected position of the desired agglomeration point.

If the air box with the maximum measured temperature value is located in front of the selected position of the desired sintering point, the transportation speed of the sintering machine is increased by a well-defined coefficient. If the air box with the maximum measured temperature is located after the selected position of the sinter point, the speed of the machine is reduced by the same firmly determined coefficient.

From I8 3211441 a known method and device for controlling the speed of transportation of the sinter machine. For this purpose, the temperature and pressure of the exhaust air are measured in one of the plurality of consecutively located air ducts of the DwightLloyd sintering machine (Pn1db1-b1oob) and check whether these measured values are in the required range. This indicates that the sintering process will be completed in the required time frame or at the desired position in the sintering machine. During the agglomeration, the temperature profile measured in successive air ducts shows the maximum at the agglomeration point of the agglomerate layer. The measured pressure of the exhaust gases seeping through the agglomerate layer remains approximately constant until the agglomeration point is reached and clearly decreases after reaching the agglomeration point. By appropriately combining the ranges of temperature and pressure of the exhaust air that are appropriately selected for the sintering machine and the process to be performed, it can be decided for the selected air box whether the process is located near the selected air box of the sinter machine in the vicinity of the sintering point. Depending on the combination of the two measured values, the transport speed of the sinter machine will be increased or decreased in order to move the sintering point to the area of the selected air box.

However, this regulation is relatively costly, since two different measured values must be taken into account to ensure reliable determination of the agglomeration point. In addition, fluctuations in the absolute values of the measured pressure may occur, for example, depending on the load of the sintering machine on the grate. Therefore, this measured value is suitable for controlling the transport speed of the sinter machine only to a limited extent.

For a comparable sintering machine, υδ 4065295 describes a method for controlling the transport speed based on a temperature measurement measured in the collectors of air ducts.

- 1 027450

The control variable of regulation is the temperature of all exhaust gases from all air ducts located one after another in the sintering machine, which is measured in a collection pipe directly in front of the suction fan. As an additional control variable, the deviation of the average temperature of all exhaust gases that leave the air ducts with a temperature above 100 ° C is used. This variable reacts faster than the total temperature of the collected exhaust gases in the collection pipe. This method can also be applied when the absence of a maximum temperature or only a maximum temperature locally distorted by external influences can be detected in air ducts. Alternatively, as a second control variable, it is proposed to determine the maximum temperature in sequentially located air ducts with cascade control, which corresponds to the current agglomeration temperature. The desired agglomeration point is determined based on the temperature of the exhaust gases in the collection pipe. With this method, inaccuracies in determining the maximum temperature must be compensated, for example, in the last air box. However, this regulation is also costly, as it is necessary to define two control variables. In addition, regulation for setting the agglomeration point can only be applied when a maximum in the temperature distribution is also set. For example, this is not the case when the agglomerated material is not yet agglomerated until the material is dumped.

I8 3399053 describes a method and apparatus for controlling the transport speed of an agglomeration machine, in which the temperature is measured in three air ducts located at the end of the transport path and in the middle of the transport path of the agglomeration machine in order to continuously adjust the transport speed and adjust the desired agglomeration point. From the three temperature measurements at the end of the transport path, the current maximum of the temperature distribution along the transport path is determined by parabolic adaptation. This current maximum is compared with the desired position of the maximum and the agglomeration point, respectively, while the change in the transportation speed of the agglomeration machine is derived from the deviation.

From temperature measurements in the middle of the transportation path, a prediction is made of the rate of change of the position of the temperature maximum.

The transportation speed of the sinter machine is then adapted depending on the current maximum temperature and the predicted rate of change. Given the predicted rate of change, you can quickly take into account changes in the characteristics of the agglomeration, for example, sequentially introduced material. However, this method is subject to great uncertainty, since each of the individual temperature measurements includes relatively large errors, which, in addition to possible systematic effects, are also randomly affected by inaccuracies in predicting the agglomerate composition. Parabolic adaptation based on such imperfect variables can lead to the fact that the adaptation itself is also imperfect, and the maximum temperature distribution is determined at a noticeable distance from the actual maximum. The same applies to predicting the rate of change, so that generally unstable regulation is obtained.

Therefore, the objective of the invention is to provide a simple and reliable ability to control the speed of transportation of the sintering machine.

According to the invention, this problem is solved using the method according to p. 1 of the claims and using the control device according to p. 4 of the claims.

In the method according to the above, thus, provide a comparison of the temperature profile in three, in particular exactly in three consecutive measuring points. These measurement points may possibly be located directly one after the other and / or one after the other, separated by other measurement points. When comparing at three measurement points, the maximum temperature is set when the first and third measurement points in the transport direction have a lower temperature value than the second measurement point. Even if the invention is especially advantageously carried out with an assessment at exactly three measuring points, it is also possible to evaluate more than three measuring points, in this case, for example, the first and last measuring points must have a lower temperature value than some or all of the middle measuring points located between them so that you can determine the maximum. To determine the maximum, especially mainly according to the invention, in the sequence of measurement points, a point of change (inflection) is sought, in which a sequence of rising temperature values is replaced by a sequence of falling temperature values. This change point is then taken as the maximum of the temperature curve.

However, according to the invention, the presence of a maximum of temperature is not established when all measuring points, that is, in particular, all measuring points selected in the considered evaluation range, form an ascending sequence of temperature values, so that, in particular, in three, or even more, sequentially located measurement points do not detect any maximum. After determining whether it is possible or not to establish a maximum, the transportation speed is controlled at a set maximum temperature depending on the deviation of the positions of the measuring point with the maximum temperature from the position of the selected sintering point, while at an unstated maximum temperature, the transportation speed of the sintering machine is reduced by a certain amount.

This also solves the problem of the previous method of accounting for the maximum, which consists in the fact that it is impossible to determine with certainty whether the position of the agglomeration point of the agglomerated material was still in the agglomeration machine. It could very well have happened that, since the transportation speed of the sintering machine was set too high, the sintering point had not yet been reached when the sintering material was already unloaded from the sintering machine before it was completely agglomerated. Thanks to the method of recognizing the agglomeration temperature, proposed in accordance with the invention, now not only take into account the maximum temperature value at various measurement points, but also analyze the profile of successively located estimated measurement points, in particular by comparing the temperature measured at one measurement point with the previous and subsequent measurement points. Only in the case when the temperature at both the previous and subsequent measurement points is less than the temperature at the mid-point of the measurement or at several mid-points of measurement, this provides a real determination of the temperature of the agglomeration. If this is not the case, the regulation according to the invention proposes to reduce the transportation speed of the sintering machine when there is a sequence of increasing temperature values up to the last measurement point in order to transfer the maximum temperature of the agglomerated material to the area of the transportation path.

In a preferred addition to the control method according to the invention, the transport speed can also be increased by a set value when the first, second and third measurement points form a decreasing sequence of temperature values. This indicates that the agglomerated material has already reached its agglomeration point before reaching the first measurement point. Thus, in this case, the absence of a maximum is established.

In at least three, but preferably in more temperature measurement points, a sequence of three measured values is sought in accordance with the invention, which reflects the criterion for recognizing the maximum temperature profile described above. If such a maximum has been set, then according to the invention, the search for the maximum can be stopped. Alternatively, however, it is also possible to continue the search and thereby perform a validation of the measured values to determine, for example, if two maxima were detected. If this is the case, a regulation error message may be displayed so that the agglomeration process can be checked, for example, using other parameters. However, until no maximum is found using the above criterion, the search for maxima is continued at three consecutive measuring points in such a way that from all the evaluated measuring points, sequences of three estimated measuring points are formed and checked, each of which follows another, while instead of exactly three evaluated measuring points, one after the other, you can evaluate a larger number of measuring points, for example four or five, as already described. Thus, the maximum search is not limited to three measurement points, however, three consecutive measurements are always compared.

According to the invention, the measuring points can be measuring points located directly one after the other along the transport path. According to the invention, however, it is also possible that the measured measuring points are determined using fixed reference sequences of measuring points. It is also possible that non-evaluated measuring points are located between successively located evaluated measuring points in the transport direction.

Compared with the prior art discussed above, a significant advantage of the proposed method also lies in the fact that according to the invention, the temperature profile along the transport path is evaluated as the only control variable. This allows you to install a single sensor, namely a temperature sensor, for each measurement point. This is especially advantageous since the sensors used in technical installations, such as sinter plants, must be durable, otherwise they can be quickly damaged. The installation of many different sensors for each measurement point therefore significantly increases the control costs of the invention.

Since in a conventional sintering machine, the desired and selected sintering point is preferably immediately before the end of the transport path in the sintering machine, the measuring points are also preferably located at the end of the transport path before the material dump, for example, in the last quarter of the sintering machine.

Preferably, more than three measurement points are also provided according to the invention in order to be able to determine the maximum temperature distribution over most of the transport path. In conventional sinter plants, it is particularly preferable according to the invention to have from four to six measurement points, which usually cover a considerable length of the transport path of the sinter machine. Typically, an agglomeration machine is divided into homogeneous sections. It was found that the structural width of the segment, which is 3,027,450, is 3 m, was structurally preferable. Each of these segments contains an air box, with the last four air boxes being divided in half to provide a more accurate determination of the sintering temperature.

In a preferred embodiment of the method according to the invention, the measuring points can be located in air boxes, preferably in air boxes located directly one after the other. The maximum local resolution of the temperature distribution then corresponds to the diameter or length of the air box in the transport direction, when the measuring point is located in each air box of the sinter machine or at least in each air box of the sinter machine in the region of interest. The measurement points are preferably located near the suction openings of the air ducts into which exhaust gases are pumped through the agglomerated material by the suction fan behind the air ducts. The temperature of the exhaust gases is directly and explicitly determined by the temperature of the agglomerated material, while, in particular, the temperature profile of these exhaust gases follows the temperatures in the agglomerated material along the transport path.

Instead of evaluating the measuring points located directly one after the other, the three measuring points can also be selected from a plurality of measuring points located in series, with the first, second and third measuring points located one after the other in the transport direction, however, points not taken into account are located between these measuring points measurements. Thus, it is also possible to take into account the different widths of the measurement curve.

This is especially recommended when the air box is divided into several, that is, two or more segments in the transport direction and a measuring point is located in each segment. In this case, the measurement can be performed in general with a better resolution, since the transportation path can be scanned with the resolution provided in the air boxes. Segments can be logically organized in such a way that different temperature sensors are located in different areas of the air box. It is also possible to carry out structural separation of the segments, for example, using suitable dividing walls in the suction openings or pipes. According to the invention, it is particularly advantageous to arrange a plurality of segments especially in the last third or quarter of the sintering machine, in which the selected sintering point is generally located.

According to a particularly preferred embodiment, the height of adaptation when the transportation speed changes in the case of a set maximum temperature may depend on the deviation between the position of the set maximum temperature and the position of the selected agglomeration point. Thus, depending on the deviation of the actual agglomeration point from the desired one, the regulation is accelerated in the direction of the desired or selected agglomeration point. Adjusting the adaptation height, for example, can be done by adjusting the parameters of the regulator used, P-, PI-, PID- or another controller. Alternatively, for different ranges of deviation values, it is also possible to compile a table of values from which the adaptation height of the change in transport speed is then read.

In the case when no maximum is found in the assessment of the measurement points, the adaptation height can be fixed, that is, the transportation speed can be changed by a fixed amount. The purpose of this change is to shift the agglomeration point in the agglomeration machine or in the region of the measurement points in the agglomeration machine so that a maximum is then detected. Once the maximum is found, the method described above for shifting the actual agglomeration point to the selected agglomeration point can be carried out.

According to a preferred variant of the proposed method, the optimized transport speed can be determined from the burn rate for a particular installation, the composition of the agglomerated material, the loading height of the material and the length of the agglomeration machine, preferably the length of the agglomeration machine between the flash point of the agglomerated material and the selected agglomeration point. This theoretically determined optimized transportation speed can be compared with the current transportation speed and / or taken into account when changing the transportation speed. A comparison of the optimized transport speed and the current transport speed can be used to more quickly find the transport speed that is appropriate for the process, so that you can quickly find the transport speed adjustment. In addition, the proposed comparison can be additionally or alternatively applied to optimize the burn-out rate for a particular installation when the maximum temperature is set. The burn-up rate is mainly obtained from theoretical considerations regarding this installation, which, in the current operating mode, can be specified using measured values. In addition, the burn-through speed can be used to specify the approximate transport speed as an initial control value in order to minimize possible control deviations and obtain dynamic characteristics of a weak control signal, which provide a particularly fast correction.

According to the development of this feature of the invention, it is also possible to establish the difference between the current actual transportation speed and the optimal transportation speed with a warning message issued when the threshold value is exceeded. The warning message may possibly also contain a link to a preferably set transport speed, especially when it is impossible to establish or find any maximum when checking the measuring points.

According to the invention, the present invention also relates to a control device for controlling the temperature of the agglomeration in the sintering machine. This control device includes a computing device and at least three ports for connecting temperature sensors associated with individual measurement points, and an output for setting the speed of transportation. However, it is preferable to connect a larger number of temperature sensors to the control device, while the number of measurement points optimally corresponds to the number of ports. According to the invention, the computing device is adapted to implement the above method or part thereof, for example, by means of suitable software.

The development of the control device according to the invention includes the integration of the control device in the control unit of the sintering machine, which sets the speed of transportation of the transport path of the sintering machine. To this end, the control unit can activate suitable drive units for the conveyance path, in particular a conveyor belt or a cart, possibly moving along a closed loop. The drive units, in particular, can be driven by an electric motor or hydraulically. According to the invention, the output of the control device for setting the transport speed is connected to the input of the control unit of the control device. This port can also be implemented in an integrated computing device without recognizable outputs and control inputs when regulation and control are performed in a common microprocessor.

Preferably, all or some ports, but at least three ports of the control device, can be connected to temperature sensors, which are located in the direction of transportation on air boxes sequentially located along the transport path of the sinter machine, preferably in air boxes working in the suction direction, and each the sensor forms a measuring point.

Reliable temperature measurement, in particular, can be carried out when the temperature sensors are located in the suction devices of the air ducts, for example in conical grooves or funnel-shaped openings. As a result, the exhaust gases seeping through the agglomerated material are sucked from a precisely defined area in which a certain degree of burn-through of the agglomerated material is achieved.

To further increase the resolution of the temperature measurement, at least one suction device, but also possibly several suction devices or all suction devices can be segmented in the transport direction, with a temperature sensor being placed in each of several or all segments of the suction devices as a measuring point .

Additional advantages, features and possible applications of the present invention can also be obtained from the following description of exemplary embodiments and drawings. All described and / or illustrated features form the content of the present invention by themselves or in any combination, also regardless of their inclusion in the claims or their backlinks.

In the drawings:

in FIG. 1 schematically shows a control device connected to a control unit of an agglomeration machine and connected to measuring points according to the invention;

in FIG. 2 schematically shows the procedure of the method proposed according to the invention.

In FIG. 1 schematically shows an agglomeration machine 1 in which granular or powdery substances, for example ores, are connected to each other by heating. In the dump 2 of the material, the heated material is thus loaded onto the transportation path 3, formed, for example, in the form of a grate, moving in a closed loop. The transport path 3 moves in the transport direction indicated by arrow P. The agglomerated material is first passed under the igniter 4, which ignites the agglomerated material on its surface.

During movement along the transport path 3, the surface-ignited agglomerated material burns out along the height of its layer before being discharged from the transport path 3 through the material dump 5 in the form of an agglomerate for supply, for example, to a subsequent process. As soon as the agglomerated material burns in height, the agglomeration process is completed. In this process, the desired Ό agglomeration point is selected. Typically, the selected agglomeration point находится is immediately in front of the end of the transport path 3 and the material blade 5 in the transport direction R.

To facilitate the burning of the agglomerated material, air ducts 6 are installed below the transport path 3, which are connected through a suction pipe 7 to a fan 8 operating in the suction direction. The air ducts 6 include suction devices 9 made in the form of longitudinal grooves, in which the greatest opening is on the side turned to the transportation path 3 in order to suck the exhaust gases generated during the burning of the agglomerated material under the influence of negative pressure, formed by the fan 8. Each of the air ducts 6 is located below the transportation path 3, with its own suction devices 9 adjacent to each other, while for clarity, not all air ducts 6 are shown In FIG. 1. In addition, for clarity, not all shown air ducts with their suction devices 9 are indicated by position numbers.

In the air ducts 6, which are transported directly behind each other in front of the material dump 5, or, more precisely, in their suction devices 9, measurement points 10 are located, not all of which are provided with reference numbers for the sake of clarity.

Each of the points 10 of the measurement includes a temperature sensor located in the suction devices 9 of the air box 6, while the sensor measures the temperature of the exhaust gases sucked from the agglomerated material on the transported layer in the area located above the suction devices 9.

In order to be able to consistently refer to different measuring points, they are designated as measuring points M1-M5. However, it should be clearly understood that the invention is not limited to providing exactly five measurement points 10. On the contrary, the specialist can adapt their number in accordance with the conditions of the sintering machine 1, and especially from the last third to the last quarter of the transportation path 3 are covered with suitable measurement points 10 in order to enable detection of the sintering temperature in this area of the sintering machine 1.

Using the available ports 11, the measurement points from M1 to M5 are connected to the control device 12, in which the method described below is carried out. In the construction block with the regulating device 12, there is a control unit 13, which includes an output 14 for setting the speed of transportation. This output 14 is connected to the drive unit 15 of the transport path 3 in order to move the transport path 3 in the transport direction with the transport speed set by the control unit 13. Both the regulating device 12 and the control unit 13 include computing devices, possibly also a general computing device, which is designed to implement the method described below and to drive the transportation path 3.

The method of adjusting the agglomeration point Ό of the agglomeration machine 1 proposed in the invention provides a measurement of each of the exhaust gas temperatures at the measurement points from M1 to M5. A typical temperature profile of these exhaust gases in an agglomeration machine provides an increase in temperature values at the measurement points 10, following one after another in the transport direction, until the agglomeration point Ό is reached. After reaching the agglomeration point Ό, the agglomerated material is cooled again, so that the temperature of the exhaust gases decreases. Thus, the maximum temperature is reached at the Ό agglomeration point. According to the invention, the temperature profile measured at the measuring points M1 to M5 is then analyzed as explained below with reference to FIG. 2.

It is assumed that in this method all sequentially located measuring points from M1 to Mn are evaluated. For this purpose, each of the measured temperature values at the measuring points Μ (ί1), Μ (ί) and Μ (ί + 1) is compared with each other. Start from the second measurement point Μ (ί = 2) in the transport direction, and during the first scan, check if the temperature at the measuring point Μ (ί-1) is less than the temperature at the measuring point Μ (ί). If this is the case, the next check carried out consists in comparing the measuring points Μ (ί) and Μ (ί + 1), while in position максимум the maximum is noted when the temperature at point Μ (ί) is greater than the temperature at the measuring point Μ (ί + 1). In this case, the position of the measurement point Μ (ί) is determined as the current agglomeration point Ό (ί), and a difference is set with respect to the selected agglomeration point Ό. Depending on the height of this set difference, the transport speed is adapted in the control device 12 or control unit 13, while this adaptation, for example, is carried out on the basis of suitable parameterization of the control parameters.

If during the first scan it is noted that the temperature at the measuring point Μ (ί) does not exceed the temperature at the measuring point Μ (ί-1), the procedure is continued at the next measuring point Μ (ί + 1), and the test is repeated until until the last measuring point is reached. If also for the last measuring point the value in меньше (ί) is less than the measured value in Μ (ί-1), the transport speed is increased by the constant K1, since the sequence of measured values indicates that the agglomeration point is on transport path 3 in front of the first measuring point M1.

However, if during the verification of the measuring point (at the next stage of the test) it is noted that the subsequent measuring point Μ (ί + 1) has a larger temperature value than the measuring point Μ (ί), the procedure is also continued until the next measuring point, until until all measurement points are processed. If this condition is also satisfied at the last measurement point, there is an increasing sequence of measured temperature values, which indicates that the agglomeration point is further than the transportation path. In this case, the transportation speed is reduced by a constant value K2.

- 6,027,450

By adjusting the transport speed, the actual agglomeration point Ώ (ί) is shifted in the direction of the selected agglomeration point D) until there is no more deviation Π (ί) -ϋ and the current set agglomeration point Ώ (ί) matches the selected point I) agglomeration.

This procedure is again explained below with reference to a specific example regarding the one shown in FIG. 1 design.

In the first case under consideration, the following temperatures were measured at measuring points from M1 to

M5:

M1: 240 ° C

M2: 250 ° C

M3: 260 ° C

M4: 270 ° C

M5: 280 ° C

In this case, there is an increasing temperature sequence, and it is impossible to establish a maximum of the temperature distribution, since each of the temperatures continues to increase from the measurement point to the measurement point. In this case, it must be recognized that the transportation speed of the sintering machine 1 is too high, and the sintering point is located after the transportation path 3. In this case, the procedure follows the right branch of the method, as shown in FIG. 2.

In the second case, at the measurement points from M1 to M5, the following temperature distribution exists:

M1: 250 ° C

M2: 260 ° C

M3: 270 ° C

M4: 260 ° C

M5: 250 ° C

In this case, lower temperatures are measured at measuring points M2 and M4 than at measuring point M3. Therefore, we can assume that the current point Ώ (ί) of the agglomeration is located at the measuring point M3. For a value of 1 = 3, the average branch of the technological scheme of FIG. 2, and after determining the maximum temperature at the measurement point M3, the evaluation of the measurement points is stopped.

Instead, the difference between the current agglomeration point Ώ (ί) and the selected agglomeration point D) as a control deviation is determined. Depending on the magnitude and sign of this difference, which forms the control deviation, correction of the agglomeration machine 1 transportation speed is now carried out. This means that the correction is the greater, the farther the actual agglomeration point Ώ (ί) from the selected agglomeration temperature.

In the case described above 2, the selected agglomeration point I) should be located at the measurement point M4, as shown in FIG. 1. The current agglomeration point Ώ (ί), however, is located at the measuring point M3, so that the transport speed is slightly increased in order to shift the actual agglomeration point Ώ (в) to the position of the measuring point M4.

If the actual point Ώ (ί) of the agglomeration were in the region of the measuring point M1, this correction would be greater.

If the current agglomeration point Ώ (ί) was after the selected agglomeration point D) on the transportation path, the transportation speed would be correspondingly reduced.

In connection with the determination of the transport speed, the transport speed of the sinter machine can also be optimized by determining the burn rate. Depending on the composition of the material, a specific burning rate is obtained for each sintering machine 1, with which the sinter layer burns out in the vertical direction. If the burning rate is known or determined, the theoretical optimum transportation speed can be calculated from the current height of the loaded material and the length of the sintering machine or, in particular, the distance between the ignition point of the sintered material on the transportation path and the selected sintering point based on the following ratio:

length optimal transport speed = (layer height / burn-through rate)

When, in one example, the burn-out rate determined for the installation is 15 mm / min and the height of the loaded material is 700 mm, an optimum transport speed of 4.28 m / min is obtained with the appropriate length of the sintering machine from igniting the ag-7,027,450 material to be selected agglomeration points. However, the values used in the example serve only the purpose of explanation, and they need to be adapted depending on the sinter machine, operating mode and material composition.

This theoretically determined optimal transportation speed can be used to determine the transportation speed associated with the provided regulation, for example, using a regulating device, in order to ensure stable regulation and adapt the transportation speed as quickly as possible to the required operating mode of the installation, which depends on sinter machine design and from sinter requirements for the subsequent process. Given these parameters, the installation operator can initially choose the appropriate transportation speed. With the selected transportation speed, the agglomerated material is transported from the material inlet 2 to the material dump 5, while the surface of the agglomerate layer is ignited once in the igniter 4, and the ignited agglomerate layer is lowered by air ducts 6.

By selecting the point And agglomeration, the installation operator determines in which position the agglomerate layer should completely burn out. Thanks to the proposed regulation, it is now possible to quickly and accurately shift the measured or actual agglomeration point Ό (ί) to a preselected position of the agglomeration point AND, and this position can also be reached when it is impossible to set any current agglomeration point Ό (ί), since the current point And the agglomeration is not in the region of the measurement points M1-M5 of the agglomeration machine 1. In this case, the agglomeration point is initially shifted in the direction of the measurement points from M1 to M5 shown in FIG. 1 until fine adjustment occurs. This is accomplished by adapting the transportation speed to precisely specified values.

In connection with this regulation and to speed up the passage for the installation operator, it is also possible to offer an optimized transportation speed, for example, when the difference between the currently determined agglomeration point Ό (ί) and the selected agglomeration point AND exceeds a certain threshold value.

List of item numbers:

- sinter machine

- material inlet

- way of transportation,

- igniter

- material dump

- air box,

- suction pipe

- fan

- suction devices

- measuring points,

- port

- regulating device

- Control block,

- exit,

- drive unit of the transportation path,

P is the direction of transportation,

And - agglomeration point,

Ό (ί) - set agglomeration point, position of the maximum measured temperature,

M1-M5 - measuring points.

Claims (5)

CLAIM 1. A method for controlling the speed of transportation of agglomerated material in an agglomeration machine (1), in which the agglomerated material is loaded onto the transport path (3), ignited and transported along air ducts (6) located in the transport direction (P), up to the blade (5) ) of the material, in this case, the temperature is measured in at least three measurement points (10), successively located along the transportation path (3), and the transport speed of the sintering machine (1) is controlled depending on the position t cells (Ό (ί)) with the maximum measured temperature relative to the position of the selected agglomeration point (I) on the transportation path, characterized in that the temperature profile of three consecutive measurement points (10) is compared, and the presence of the maximum temperature is established when the first and third of these consecutively located points (10) of measurement in the direction (P) of transportation have a lower temperature value than the second of these three consecutively located points (10) of measurement, and there is no the temperature maximum, when all measurement points (10) form an increasing sequence of temperature values, and at the set maximum temperature, the transport speed is controlled depending on the deviation between the position of the measuring point with the maximum temperature (Ώ (ί)) and the position of the selected agglomeration points (Ώ) in such a way that when it is established that the point (Ώ (ί)) with the maximum temperature is located at the selected point (Ώ) in the direction of transportation (P), the transportation speed is increased and when it is established that the point (Ώ (ί)) with the maximum temperature is located after the selected point (Ώ) in the direction of transportation, the transportation speed is reduced, and the correction of the transportation speed in this case is the greater, the farther the point (Ώ (ί)) from the selected point (Ώ) of the agglomeration, and in the absence of a set maximum temperature, the transport speed is reduced by a predetermined fixed value. 2. The method according to claim 1, characterized in that the transportation speed is increased by a predetermined fixed value when the first, second and third measurement points (10) form a decreasing sequence of temperature values. 3. The method according to claim 1 or 2, characterized in that the points (10) of the measurement are located in the air ducts (6). 4. A control device for controlling the speed of transportation of the agglomerated material in the sinter machine (1) with a computing device and at least three ports (11) for connecting to temperature sensors associated with individual measurement points (10) and an output for setting the transportation speed, characterized in that the computing device is arranged to carry out the operations of the method according to any one of claims 1 to 3. 5. The control device according to claim 4, characterized in that the control device (12) is integrated in the control unit (13) of the sintering machine, which sets the speed of the transportation of the sintering machine, and that the output of the control device for setting the speed of transportation is connected to control unit input control.