• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    There is provided a method for controlling a furnace (4) for heating steel products (5), comprising a determination for a part of a product of a quantity of scale formed by heating this part, this determination being carried out from measured data relating to this part before and after reheating, a correction of an operating parameter of the oven as a function of the amount of scale formed formed so as to reduce the amount of scale formed by reheating.
    公开号:FR3032265A1
    申请号:FR1550878
    申请日:2015-02-04
    公开日:2016-08-05
    发明作者:Yuen Yee Chan；Jean Luc Magalhaes
    申请人:Fives Stein SA；
    IPC主号:
    专利说明:

    [0001] FIELD OF APPLICATION The invention relates to a method and a device for controlling a furnace for reheating iron and steel products.
    [0002] PRIOR ART The invention belongs to the field of reheating furnaces for iron and steel products. When reheating a steel product such as billet, bloom or slab in a heat treatment furnace over a low heat, the product oxidizes on the surface. The quantity, types and qualities of oxides formed depend on the nature of the steels, the chemical composition of the fumes, the temperatures reached, the residence times of the product in the different zones, the different temperatures in the furnace and the curve heating the product along its passage through the oven. Depending on the values of these different parameters, the scale that forms on the surface of the product is more or less important in quality, quantity and behavior. The scale produced, for example between 0.5 and 1% of the weight of the product charged, causes a loss of material which is removed before entering the mill and is therefore not transformed into a finished product ( wire, section or sheet), which represents an economic loss for the plant operator.The heating of the part of the steel lost in the form of calamine constitutes a loss of energy, a reduction of the overall efficiency of the plant. installation and an increase in the cost of production of the finished product.The scale produced can be detached in the oven during the crossing of the products during their heating The accumulation of calamine in the zones where it is detached, in particular in the oven , can create deposits whose importance disrupts the very operation of the oven and imposes its stop for cleaning.This downtime constitutes losses of production of the installation and penalizes its average profitability during the whole of the The scale that has been formed on the surface of the product must be removed before rolling, usually in a descaler flushing jets of water at high pressure on the surface of the product to detach the calamine by thermal shock and mechanical action. projected water flows. The scale that has formed on the surface of the product may remain adherent, that is to say, not detach from this surface, either in the oven or in the descaler, and follow the product in the different rolling groups. This situation can lead to defects on the surface of the finished product or even cause damage to the rollers of the rolling units or breakage of these rollers. It is thus understood that the method for reheating a rolling line of steel products is strongly influenced by the formation of scale which may have a direct impact on the quality of the finished product and / or a significant influence on the efficiency of the oven, on its consumption and over the production period between two stops for maintenance.
    [0003] This situation can be made particularly difficult for flat-type furnaces which heat a large quantity of products of different dimensions and steel composition which are treated according to identical heating curves or oven settings, which increases the quantities of products. calamine produced and penalizes the thermal and economic balance of the furnace and the entire rolling line. The amount of scale produced depends on the type of heating achieved in the oven. FIG. 3 illustrates an example of a temperature curve of a product during its total reheating time t2 as it passes through the oven to the dewatering temperature 12. Thus, FIG. 3 shows on the abscissa the length of the oven, or in an equivalent manner, the residence time of the product in the furnace it passes through at a constant speed. During a residence time equal to t2-t1, the temperature of the surface of the product is above a temperature 11, for example 570.degree. C., from which this surface oxidizes under the action of the oxygen present in the corresponding zone of the furnace. It is understood that the residence time above the scale formation temperature and the oxygen content present in the fumes directly influence the amount of scale formed and the possible nature of this calamine. These parameters also influence the amount of scale that settles in the furnace during reheating of the products, the detachment of the scale in the descaling plant and the amount of scale remaining on the surface of the products that can cause defects. surface during rolling operations. State of the art The formation of calamine is considered as an inevitable component of the process of reheating steel products and, even if it is recovered, this recycling masks the costs of formation and treatment of this calamine. The measurement of calamine formation during the reheating process is carried out by studying samples deposited on the product and heated with it. This method is therefore essentially punctual and does not lend itself to continuous monitoring of the reheating process for each of the products treated during this process. Another method of measuring the amount of scale produced is to weigh the calamine recovered at the descaler, in decantation tanks of the descaling water or in collection tanks evacuated to the crane. This method is not accurate because it weighs the moist scale and it does not measure the calamine that is deposited in the oven but only that which is recovered after the descaler. Thus, there is an approximation on the measurement of the quantity of calamine produced. On the other hand, the durations between scales of the calamine are long, of the order of several hours between two measurements. Finally, the quantities of scale weighed can correspond to several batches of products heated in the oven. Thus, the method is global and therefore approximate. The methods for measuring the amount of scale produced by the state of the art are therefore point and approximate. They can not provide continuous control of the production of scale in the oven to act in real time on the operating parameters of the oven.
    [0004] The scale, when taken into account by the operator of the furnace, is managed according to standard settings expected to provide an average response to this phenomenon regardless of the size of the products, the materials that compose them and the heating cycles carried out. In particular, it is often realized oven setting values that increase the amount of scale produced to allow to be located in a comfort zone of the facility for which calamine is easily detached from the product during its passage in the descaler for example, to the detriment of the amount of calamine produced and the total cost of training, collection and treatment of this calamine produced. Furnaces operate with several types of gas, for example natural gas, mixed gas (a mixture of several gases) or coke oven gas. These different gases produce different smoke compositions whose effects on the formation of calamine on the surface of the product are different. These differences are not currently taken into account in furnace control. An object of the invention is to provide a method for controlling a reheating furnace of steel products overcoming all or some of the aforementioned drawbacks.
    [0005] An object of the invention is to overcome all or part of the disadvantages of the state of the art, and / or to improve the flexibility and simplicity of piloting a reheat furnace while maintaining or improving the robustness and the cost of this piloting, maintenance and / or operation of the means by which this heating furnace is controlled.
    [0006] SUMMARY OF THE INVENTION At least one of these aims is achieved with a method for controlling a reheating furnace for steel products, comprising: a determination for all or part of a product of the quantity of calamine formed by a heating of the product part, this determination being carried out on the basis of measured data relating to the part before and after the reheating, - a correction of operating parameters of the oven as a function of the quantity of carbonaceous material thus determined so as to modify the amount of calamine formed by reheating.
    [0007] Thus, the measurement is made from data specific to said product part. The determination being carried out on the basis of data measured on said part, the determination of the scale is simplified, the implementation of laying steps and removal of a sample and physical and human means to implement this pose are avoided. and drop. Of course, the determination of the amount of scale can be carried out for the whole product. Of course, the data measured after said reheating and relating to said portion may be measured after said reheating or after the descaler. The determination of the amount of calamine from data measured on the product before and just after the oven, ie before the descaler, allows to deduce the amount of calamine remaining in the oven.
    [0008] The determination of the amount of calamine from data measured on the product before after the descaler, allows to deduce the amount of scale produced during the entire process. It is also possible to optimize the adhesion characteristics of the scale on the product. This optimization reduces defects on rolled products. Advantageously, the determination of the amount of scale is carried out periodically or continuously. Advantageously, the correction of the operating parameters of the furnace is carried out periodically or continuously.
    [0009] Unlike the prior art, the method according to the invention can be implemented easily, without disturbing the conventionally used reheating or rolling process. Preferably, a determination of the amount of scale and / or a correction of operating parameters of the oven is carried out for each of the baked goods. It is thus possible to continuously control the production of scale. The determination of the amount of scale can be carried out continuously on all the products entering and leaving the oven. The correction of one or more parameters of the oven can be carried out continuously according to the information collected by the sensors installed on the oven. Thus, the invention provides a solution to the continuous control of the production of scale in the oven so as to optimize the quantity and quality produced so that it is easily removed from the surface of the products in the descaler and so that this residual amount arriving to the mill stands is as low as possible. The control method according to the invention may comprise a determination on the part of loose scale, for example by the movement of mobile and fixed spars or the supports of the products during their transfer over the entire length of the furnace. When the part of the loose scale thus determined is greater than a predetermined parameter, for example when this part is judged to be important, the control method may make a modification of the parameters of the oven so as to modify the behavior of the scale on the surface of the product. , in particular to increase the adhesion on the underside of the product. This modification can in particular act on a parameter such as excess air, residual oxygen in the fumes or the injection of water vapor or by the use of different fuels in various zones of the furnace. part of the product is made on the same part of the product before and after reheating. According to the invention, the measured data are obtained by measuring the thickness of the product, its weight or its dimensions.
    [0010] According to a first aspect of the invention, the measured data are obtained by measuring the weight of the product, this measurement being carried out by weighers of products installed before and after the oven, before the descaler to define by difference the mass of scale produced in the oven or after the descaler to define the total mass of scale produced in the oven and discharged in the descaler In a second aspect of the invention, the measured data are obtained by measuring at least one of the dimensions of the product, this The measurement is made by optical, acoustic or ultrasonic sensors arranged before and after reheating in order to determine the amount of scale formed on the surface of the product before the decalaminator. Preferably, the optical, acoustic or ultrasonic sensors are oriented so as to observe the lower and / or upper faces of the product. Preferably, the acoustic or ultrasonic optical sensors are positioned so as to observe two parts of the same surface of the product, one of the parts of this surface carrying the scale to be measured, the other part of this surface having been cleaned. for example by partial descaling. According to a third aspect of the invention, the measured data are obtained by measuring the thickness of the product, this measurement being performed by electrical measurements of the product surface. According to a fourth aspect of the invention, possibly combinable with all or part of the above aspects, a step taking into account the expansion of the product follows a measurement of the thickness of the product. According to a fifth aspect of the invention, possibly combinable with all or some of the foregoing aspects, the modification of an operating parameter of the furnace comprises an implementation of a controlled injection of steam into the furnace. This modification is intended to affect the formation of calamine on the surface of products. According to a sixth aspect of the invention, possibly combinable with all or some of the foregoing aspects, the modification of an operating parameter of the furnace comprises an increase in the amount of air and / or combustion oxidant injected into the furnace. This modification is intended to affect the formation of calamine on the surface of products. According to a seventh aspect of the invention, possibly combinable with all or some of the preceding aspects, the modification of an operating parameter of the furnace comprises an implementation of particular atmospheres in different zones of the furnace, in particular of atmospheres having controlled oxygen levels. It is thus possible to obtain residual oxygen values corresponding to the desired degree of oxidation. The purpose of this amendment is to modify the quality and quantity of scale produced.
    [0011] According to an eighth aspect of the invention, possibly combinable with all or part of the foregoing aspects, the quantity of products in the oven is adjusted according to the desired production. According to a ninth aspect of the invention, possibly combinable with all or some of the foregoing aspects, the modification of an operating parameter of the furnace comprises an implementation of several types of fuels for supplying the furnace burners and producing different atmospheres. The purpose of this amendment is to reduce the amount of calamine produced. According to a tenth aspect of the invention, possibly combinable with all or some of the foregoing aspects, an operating parameter of the furnace comprises an implementation of heating curves of the product. According to an eleventh aspect of the invention, possibly combinable with all or part of the foregoing aspects, the method according to the invention comprises an optimization of the amount of metal lost in and out of the oven during the process of reheating the product. According to a twelfth aspect of the invention, there is provided a device for controlling a reheating furnace for steel products, the device being configured to implement a control method according to the invention and comprising: determination means configured to determine for a portion of a product a quantity of scale formed by a heating of said product portion, these means being implemented before and after said reheating, - means for correcting an operating parameter of the oven in a function of the quantity of formed scale thus determined, these correction means being configured to reduce the amount of scale formed by the reheating. According to a thirteenth aspect of the invention, there is provided a computer program product comprising program code instructions for executing the steps of the method according to any one of the claims according to the invention when the program is executed on a computer. Thus, the invention makes it possible to continuously optimize, for each heated product or periodically on a selection of heated products, the operation of the oven by measuring the amount of scale formed during the passage of the products in the oven and, from this indication of quality and quantity to deduce the optimal settings to be applied to the reheating process to reduce the amount of calamine and / or control the formation in the oven to reduce the energy consumption of installation or reduce the problems of rolling products after reheating. DESCRIPTION OF THE FIGURES Other features and advantages of the invention will appear on reading the detailed description of implementations and non-limiting embodiments, with reference to appended figures in which: FIG. 1 presents a schematic view of FIG. a heating plant for a steel product; FIG. 2 shows a schematic view of a descaling and rolling installation of the product heated by the heating installation; FIG. 3 illustrates an example of a temperature curve of the product during its heating time in the heating installation; FIGS. 4 to 6 show devices for measuring calamine by measuring its weight; FIGS. 7a and 7b present devices for measuring the scale by measuring the difference between its thicknesses before and after reheating; - Figure 7c presents the sonic, ultrasonic or electrical devices for measuring the calamine thickness on the product. DESCRIPTION OF THE INVENTION These embodiments being in no way limiting, it will be possible in particular to make variants of the invention comprising only a selection of characteristics described below, as described or generalized, isolated from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the art.
    [0012] FIGURE 1 presents the principle of a rolling mill for a steel product. A charging machine 1, for example with fingers, grasps a steel product 2 fed by a roller table 3. The roller table 3 brings the product 2 to a furnace 4 for heating steel products. The product 2 seized is placed by the charging machine 1 in the oven 4 on transfer spars (not shown). As it passes through the oven, the product 2 to be baked in the oven gradually heats up according to a predetermined heating curve, for example to be raised from the external ambient temperature to the oven 4 until typically a temperature of the furnace outlet between 1100 ° C and 1300 ° C. A heated product 5 is taken out of the oven by a finger machine 7 and placed on another roller table 6 which discharges it to a mill (not shown). FIG. 2 shows the roller table 6 for discharging the heated product 5 after it has been taken out of the oven 4. This product is moved by the roller table 6 to a descaler 8. In FIG. 2, the product within the descaler 8 is numbered 5 '. The product 5 'is exposed in the descaler 8 to jets of water 9, 10 at high pressure. The jets of water 9, 10 at high pressure are respectively oriented on an upper and lower part of the product 5 '. These jets of water 9, 10 are arranged to detach the scale formed on the surface of the product 5 'and evacuate the molten carbon in a circuit 11 to decant tanks (not shown) for recovery. After descaling by the descaler 8, the product is fed to the input of a laminator. In the laminator, the product is referenced 5. The product 5 "passes into different rolling sections 12a, 12b. The rolling sections 12a, 12b are arranged to obtain a desired wire, profile or sheet from the product 5. In installations according to the state of the art, the scale recovered in the circuit 11 is weighed to define overall the mass recovered and the loss on ignition, that is to say the relative amount of scale produced during the heating operation of the product, according to the invention, a device for continuously measuring the scale produced by reheating is arranged at the outlet of the oven 4, possibly after the descaler.This measuring device is arranged to compare the amount of scale with limits set according to the heating mode and the nature of the steel heated in the oven. allows to deduce a heating efficiency of the furnace and develop a corrective heating strategy able to reduce the scale produced within the limits of quantity and quality desired.
    [0013] As illustrated by FIGURE 4, the scale measurement device formed may be based on the weighing of the product at the oven outlet and when it is heated. The product 5 then rests on a portion of the roller table 6. This roller table portion 6 has bearings 14 which are integral with a frame 15. The frame 15 is independent of the frame 13, respectively 17, of tables rollers arranged upstream or downstream 17 of the frame 15 with respect to the advance of the product 5. The frame 15 of the roller table 6 is embedded in load cells 16, for example electronic load cells, configured to perform a measurement of all the weights of the product 5 and the frame 15. As shown in FIGURE 5, the measuring device of the scale formed may alternatively comprise a comb 21 mounted on the load cells 22 and a lifting equipment 20 controlled by a actuator 19. When the actuating cylinder 19 is actuated, the product 5 is raised and a measurement of the weight of the entire product 5 and the comb 21 is performed. The device illustrated in FIG. 6 presents an alternative measurement of the weight of the product using the charging machine 1 of the product 5 in the oven. Fingers 23 supporting the product 5 are equipped with load cells (not shown), for example electronic, which perform the weighing of the product during its lifting for charging. It is understood that it is possible to carry out this weighing also with the dewatering machine 7 of the heated product 5, after passing through the reheating furnace 4.
    [0014] It is understood that these different weighing solutions of the product can be combined for the continuous measurement of the weight of the product at the inlet and at the outlet of the oven, possibly after the descaler, to deduce by difference the weight of the scale deposited in the oven or evacuated in the descaler.
    [0015] The devices shown by way of example in FIGURES 4 to 6 provide a measure of the amount of calamine on the product by weighing it. Thus, a determination is made for a product of the amount of scale formed by reheating of the product part, this determination being made from measured data relating to said part before and after said reheating. FIGS. 7a and 7b present devices for continuous measurement of the scale directly by measuring its thickness by means of sensors 24 and 25, for example of the type of optical distance measurement. A measurement is made by optical analysis on the width of the product denoted L and on the length of the product when moving in front of the sensor. For each point of the zone scanned by a sensor 24, 25, that is to say from the surface of the product seen by the sensor, a distance measurement is carried out with a precision of the order of one micrometer which allows the measurement the actual height H, that is to say the thickness of the product. It is thus easy to calculate the volume of the product, so its weight before and after reheating with, by difference, the amount of calamine evacuated. It is also possible to measure the calamine thickness formed on the two main faces of the product.
    [0016] The measurement made also makes it possible to evaluate the thickness of scale formed on the upper surface of the product and on its underside and, thus, to compensate for the mass of scale that has separated from the product and which is fallen into the oven. It is also possible by calculation to perform the compensation of the expansion of the products. These calculations can be performed with simple physical algorithms. FIG. 7a shows a variant of use for which the measurements are made on the main faces of the product 5, 5 ', the thickness of this product being measured by difference between the distance between the cells 24 and 25 and the sum of the distances measured between these cells and the face of the product running under these cells. By this means, it is possible to map the product and to determine at any point on its main surface the measured thicknesses. FIG. 7b shows a variant of implantation of the solution illustrated by FIG. 7a for which the measuring cells 24 and 25 are not mounted opposite each other in a vertical plane but offset from each other in this vertical plane, which allows them to scan the horizontal and vertical faces of the product 5, 5 '. By this means, it is possible to make an accurate determination of the dimensions of the section of the product 5, 5 'and thus, if desired, to calculate its volume or draw a map. It is understood that all the devices making it possible to carry out a continuous measurement of the thickness of the scale formed on the surface of the product are usable according to the principles explained above. For example, as shown in FIG. 7c, it is possible to envisage sonic, ultrasonic or electrical measurement systems of the scale layer produced on the surface of the product 5, 5 '. These different devices according to FIGURES 4 to 7 may be implemented at different stages of the manufacturing process, in particular to highlight a difference in the dimensions of the products or in their significant weight of the production of scale in quantity or its behaviour. It is thus possible to highlight the quantity that can be deposited in the oven during reheating or after the oven when the product is taken by the brewing machine or at each stage of the process after the oven, for example during the transfer of the product. on the roller tables, in the descaler or in the different units of the rolling mill. The person skilled in the art knows how to place such sensors around the oven. The sensor is protected in a box cooled with water and is aimed through a sight glass swept with cold air which maintains the temperature despite the radiation it receives from the oven or product. In particular, it is of interest to set up a device for measuring the product before it is placed in the oven and another after it has been removed from the oven or after the descaler to obtain, by difference between these measurements, an image of the quantity of calamine produced and its behavior. It is also possible to carry out several measurements, for example before the oven, at the exit of the oven and after the descaler to better evaluate the different stages of the life of the scale. The device described by FIGURES 7a, 7b and 7c can be installed at the furnace inlet to define a volume model of the product when it is placed in the oven, it can be installed at the outlet of the oven or at the outlet of the descaler to produce a volume model of the product. after reheating and descaling. The comparison of the models makes it possible to draw lessons on the result of the heating. This teaching can be used in particular to act on the instructions of the furnace in order to modify the heating curve and / or the control of the burners and / or the atmosphere in the enclosure of the furnace and in particular the excess air and / or a possible injection of water vapor in certain areas of the furnace and / or operating the furnace with reducing zones and oxidizing zones and / or modifying the adjustment parameters of the descaler such as pressure water, number of descaling ramps used, speed of advance of the product. The input of this information on the product, before and after reheating, is processed by a calculator according to simple or elaborate physical models, for example to take into account the behavior of the scale, an evaluation of the part of the calamine weight is depositing in the oven during reheating, an evaluation of the scale formed on the upper surface of the product and on its lower surface. It is thus possible to take into account the fall of a portion of the scale formed on the lower face of the product during its transfer onto the side rails of the oven or on the evacuation roll tables or an evaluation of the residual part of calamine. on the surface of the product after descaling. The invention thus proposes a computer program product comprising program code instructions for executing the steps of the method according to any one of the claims according to the invention when the program is executed on a computer. It is also possible to envisage the use of a computer program product, for example of the fuzzy or self-adaptive logic type, to continuously analyze the formation of scale on the product in order to validate the action performed on the conduct of the product. Oven or evaluate changes in calamine (in quantity and quality) over time according to the changes in the process. It can be seen that by continuously measuring the amount of scale formed on the product surface and the furnace control system by computer, it is possible to continuously adjust the furnace control parameters according to a strategy. or predefined objectives, for example to reduce the quantity of calamine supplied, to stabilize the quantity of calamine produced to a predefined value according to the nature of the product to be treated and its treatment process, to modify the quantity of calamine produced in order to to obtain a calamine quality adapted to the process, for example for its discharge characteristics in the decalaminous agent. This method of continuously controlling the furnace according to the measurement of the scale produced makes it possible to optimize the complete rolling process and to optimize the energy consumption by reducing the quantity of scale produced. Of course, the invention is not limited to the examples that have just been described and many adjustments can be made to these examples without departing from the scope of the invention. In addition, the various features, shapes, variants and embodiments of the invention may be associated with each other in various combinations to the extent that they are not incompatible or exclusive of each other. Nomenclature 1 baking machine 2 steel product 3 roller table 4 reheating furnace 5 steel product 5 'produced in the descaler 5 "produced in a laminator 6 oven outlet roller table 7 shredding machine 8 decalaminator 9 jet d upper high pressure water 10 lower high pressure water jet 11 exhaust system 12a, 12b rolling sections 13 upstream roller table frame 14 roller table bearings 6 roller table frame 6 16 load cells 17 downstream roller table frame 19 control cylinder controlled lifting equipment - 16- 21 comb 22 load cells 23 machine finger 1 24, 25 optical sensors 26,27 sonic or ultrasonic or electrical sensors
    权利要求:
    Claims (18)
    [0001]
    REVENDICATIONS1. A method for controlling a steel product reheating furnace (4) (5), comprising: - a determination of a part of a product of a quantity of scale formed by a reheating of said product part, this determination being made from data measured on said part, before and after said reheating, - a correction of operating parameters of the oven as a function of the amount of calamine formed thus determined so as to modify the amount of calamine formed by reheating.
    [0002]
    2. Method according to claim 1, wherein the determination of the amount of scale is carried out periodically or continuously.
    [0003]
    3. Method according to claim 1 or 2, wherein the correction of the operating parameters of the furnace is carried out periodically or continuously.
    [0004]
    4. Method according to any one of claims 2 or 3, characterized in that a determination of the amount of scale and / or a correction of operating parameters of the oven is carried out for each of the products baked.
    [0005]
    5. Method according to any one of claims 1 to 4, wherein the measured data are obtained by measuring the weight of the product, this measurement being carried out by weighers (16, 22, 23) of products installed before and after the oven to define by difference the mass of scale produced in the oven.
    [0006]
    6. Method according to any one of claims 1 to 4, wherein the measured data are obtained by measuring at least one of the product dimensions, this measurement being performed by optical sensors (24, 25) arranged before and after after reheating to determine the calamine thickness deposited on the surface of the product on the lower and upper faces of the product.
    [0007]
    7. A method according to any one of claims 1 to 4, wherein the measured data are obtained by measuring the thickness of the product, this measurement being performed by electrical product surface measurements.
    [0008]
    8. A method according to any one of claims 1 to 4, wherein the measured data are obtained by measuring the thickness of the product, this measurement being performed by acoustic or ultrasonic surface measurements of the product.
    [0009]
    9. Method according to one of claims 6, 7 or 8, characterized in that the measured data are made on at least two parts of the same surface of the product.
    [0010]
    10.Procédé according to claims 7 to 9, a step taking into account the expansion of the product follows a measurement of the thickness of the product.
    [0011]
    11. The method as claimed in any one of the preceding claims, wherein the modification of an operating parameter of the furnace comprises an implementation of a controlled injection of steam into the furnace.
    [0012]
    The method of any of the preceding claims, wherein modifying an operating parameter of the furnace comprises increasing the amount of air and / or combustion oxidant injected into the furnace. 30
    [0013]
    13. A method according to any one of the preceding claims, wherein the modification of an operating parameter of the furnace comprises an implementation of particular atmospheres in different zones of the furnace, in particular of atmospheres having controlled oxygen. 25- 19 -
    [0014]
    A method as claimed in any one of the preceding claims, wherein the modification of an operating parameter of the furnace comprises an implementation of several types of fuels for supplying the furnace burners and producing different atmospheres with a view to reducing the amount of calamine produced.
    [0015]
    15. A method according to any one of the preceding claims, wherein an operating parameter of the furnace comprises an implementation of heating curves of the product.
    [0016]
    16.Process according to any one of the preceding claims, characterized in that it comprises an optimization of the amount of metal lost in and out of the oven during the process of reheating the product.
    [0017]
    17.Device for controlling a furnace (4) for reheating steel products (5), said device being configured to implement a control method according to any one of the preceding claims and comprising: - configured determination means for determining for a part of a product a quantity of scale formed by a heating of said product part, these means being implemented before and after said reheating, means for correcting an operating parameter of the oven according to the amount of calamine formed thus determined configured to reduce the amount of scale formed by reheating.
    [0018]
    A computer program product comprising program code instructions for performing the steps of the method according to any one of claims 1 to 16 when said program is executed on a computer.
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    JP2014095654A|2014-05-22|Method of manufacturing cold rolled steel sheet
    同族专利:
    公开号 | 公开日
    US20180017374A1|2018-01-18|
    FR3032265B1|2017-02-10|
    BR112017016727B1|2021-07-20|
    RU2017130775A3|2019-07-17|
    ES2831476T3|2021-06-08|
    RU2017130775A|2019-03-04|
    RU2710825C2|2020-01-14|
    EP3254043A1|2017-12-13|
    PL3254043T3|2021-02-08|
    CA2975845A1|2016-08-11|
    US10527406B2|2020-01-07|
    WO2016125096A1|2016-08-11|
    EP3254043B1|2020-08-19|
    MX2017010039A|2018-05-15|
    BR112017016727A2|2018-04-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3250119A|1962-06-28|1966-05-10|United States Steel Corp|Method and apparatus for measuring the thickness of an object|
    EP0767353A1|1995-09-13|1997-04-09|DANIELI & C. OFFICINE MECCANICHE S.p.A.|Method to equalise the temperature in a heating furnace with a controlled-oxidisation ambient and heating furnace carrying out the method|
    WO2002088680A1|2001-04-26|2002-11-07|L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude|Method for controlling a product treated in an oven and oven equipped with control means|
    DE102007057237A1|2007-11-26|2009-05-28|Umicore Ag & Co. Kg|Tunnel kiln for the temperature treatment of goods|
    KR101167126B1|2010-09-29|2012-07-20|현대제철 주식회사|Method for measuring size of slab|
    KR101246259B1|2011-02-24|2013-03-21|현대제철 주식회사|Measuring device for slab|
    KR20130134328A|2012-05-30|2013-12-10|현대제철 주식회사|Scale existence confirmation device|
    GB2514599B|2013-05-30|2015-07-08|Siemens Vai Metals Tech Gmbh|Adjustable descaler|
    FR3032265B1|2015-02-04|2017-02-10|Fives Stein|METHOD FOR CONTROLLING OVEN FROM MEASUREMENTS OF FORMED CALAMINE|FR3032265B1|2015-02-04|2017-02-10|Fives Stein|METHOD FOR CONTROLLING OVEN FROM MEASUREMENTS OF FORMED CALAMINE|
    CA3057054C|2017-04-25|2021-11-16|Nippon Steel Corporation|Scale composition determination system, scale composition determination method, and program|
    FR3102549B1|2019-10-28|2021-11-26|Fives Stein|Device and method for controlling a reheating furnace|
    法律状态:
    2016-01-22| PLFP| Fee payment|Year of fee payment: 2 |
    2016-08-05| PLSC| Publication of the preliminary search report|Effective date: 20160805 |
    2017-01-24| PLFP| Fee payment|Year of fee payment: 3 |
    2018-01-23| PLFP| Fee payment|Year of fee payment: 4 |
    2020-01-22| PLFP| Fee payment|Year of fee payment: 6 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550878A|FR3032265B1|2015-02-04|2015-02-04|METHOD FOR CONTROLLING OVEN FROM MEASUREMENTS OF FORMED CALAMINE|FR1550878A| FR3032265B1|2015-02-04|2015-02-04|METHOD FOR CONTROLLING OVEN FROM MEASUREMENTS OF FORMED CALAMINE|
    PL16705298T| PL3254043T3|2015-02-04|2016-02-04|Device and method for determining the loss on ignition of at least part of an iron and steel product|
    EP16705298.4A| EP3254043B1|2015-02-04|2016-02-04|Device and method for determining the loss on ignition of at least part of an iron and steel product|
    ES16705298T| ES2831476T3|2015-02-04|2016-02-04|Device and method to determine in real time oxide scale formed on the surface of semi-finished cast iron products|
    RU2017130775A| RU2710825C2|2015-02-04|2016-02-04|Device and method for controlling furnace, based on measurements of formed scale|
    US15/548,592| US10527406B2|2015-02-04|2016-02-04|Device and method for determining the loss on ignition of at least part of an iron and steel product|
    BR112017016727-1A| BR112017016727B1|2015-02-04|2016-02-04|DEVICE FOR DETERMINING THE LOSS BY IGNITION OF AT LEAST A PART OF A STEEL PRODUCT, DURING THE PASSAGE OF A STEEL PRODUCT THROUGH A REHEATING FURNACE LOCATED AT THE UPGRADE OF A DESCALING EQUIPMENT, PROCESS OF DETERMINING THE PART OF A STEEL PRODUCT OF A STEEL PRODUCT DURING ITS PASSAGE IN A REHEATING OVEN, COMMAND PROCESS OF A STEEL PRODUCT REHEATING FURNACE|
    MX2017010039A| MX2017010039A|2015-02-04|2016-02-04|Device and method for determining the loss on ignition of at least part of an iron and steel product.|
    CA2975845A| CA2975845A1|2015-02-04|2016-02-04|Device and method for determining the loss on ignition of at least part of an iron and steel product|
    PCT/IB2016/050567| WO2016125096A1|2015-02-04|2016-02-04|Device and method for determining the loss on ignition of at least part of an iron and steel product|
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