JP2019529714A - Uniform treatment equipment and pickling equipment - Google Patents

Abstract

A uniform processing apparatus according to an embodiment of the present invention includes a chamber member provided for the passage of a steel plate, the chamber member, and a replenisher liquid sprayed on a central portion of the upper surface in the width direction of the steel plate, A nozzle member for flowing a replenisher from the upper part to the upper edge portion in the width direction of the steel plate, and a separation provided in the transverse direction in the chamber member for temporarily retaining the replenisher flowing down from the upper surface of the steel plate A plate member. The pickling apparatus according to another embodiment of the present invention includes an acid tank unit that is provided on a path along which a steel plate moves, an acid solution is provided to pickle the steel plate, and the acid tank unit is linked to the acid tank unit. And a pickling adjustment unit that adjusts the pickling strength for the steel sheet.

Description

  The present invention relates to a uniform processing apparatus and pickling apparatus for removing foreign matters such as scales on a steel plate.

  Usually, in the case of a hot-rolled steel sheet, a scale is generated on the surface of the steel sheet in the process of being heat-treated and rolled. If this is not removed, the scale is caught in the rolling roll in the cold rolling process performed later, causing the problem of damaging the steel sheet surface, so removing the steel sheet surface scale is an indispensable process. .

  Conventionally, in order to remove the scale, the steel sheet was immersed in a plurality of acidic solutions and continuously passed through for pickling. By the way, recently, the production amount of high-strength steel sheets and electromagnetic steel sheets with increased contents of silicon and manganese has increased, but the high-grade steel sheets are difficult to pickle steel. There was no problem.

  That is, since such high-grade steel sheets contain silicon between the surface and the scale, when pickling with a conventional pickling device, it takes more time than general steel sheets and ensures pickling quality. There was a drawback that it could not be done.

  As a result, the conventional pickling apparatus has a problem that the production rate per unit time is reduced because the pickling speed is lowered in order to remove the scale of the high-grade steel sheet.

  In general, a pickling apparatus is being manufactured by mixing a high-grade steel plate with a hard pickled steel type and a general steel type. However, there is a limit that the pickling quality required for each steel type cannot be secured.

  On the other hand, in order to improve the pickling speed, conventionally, a method of spraying a hydrochloric acid solution from the side surface of the acid tank unit and continuously supplying a fresh hydrochloric acid solution to the surface of the hot-rolled steel sheet has been used.

  However, when the hydrochloric acid solution is sprayed from the side of the acid tank unit, the injected hydrochloric acid solution is not sufficiently supplied to the center of the hot-rolled steel sheet, so the hydrochloric acid solution is uniformly supplied to the upper and lower surfaces of the hot-rolled steel sheet. In addition, since it did not reach the center of the hot-rolled steel sheet sufficiently, uniform pickling could not be realized, and the pickling efficiency was lowered and the pickling process took time.

  Therefore, research on a pickling apparatus for solving the above-described problems has become necessary.

  The objective of this invention is providing the uniform processing apparatus which can supply a replenisher uniformly with respect to a steel plate, and raises a pickling efficiency as a result.

  Another object of the present invention is to provide a pickling apparatus capable of adjusting the degree of pickling for each steel type.

  A uniform processing apparatus according to an embodiment of the present invention is provided with a chamber member provided for the passage of a steel plate, the chamber member, and a replenisher is sprayed on a central portion of the upper surface in the width direction of the steel plate, A nozzle member for causing the replenisher to flow from the upper part to the upper edge portion in the width direction of the steel sheet, and a separation provided in the transverse direction in the chamber member for temporarily retaining the replenisher liquid flowing down from the upper surface of the steel sheet. A plate member.

  Further, in the uniform processing apparatus according to an embodiment of the present invention, the separation plate member is formed with a guide hole in a portion facing a central portion in the width direction of the steel plate, and is formed in a lower center portion in the width direction of the steel plate. The flow of the replenisher may be induced.

  In the uniform processing apparatus according to the embodiment of the present invention, the guide hole may be provided in the separation plate member in a long slot shape in the length direction of the steel plate.

  In the uniform processing apparatus according to the embodiment of the present invention, the separation plate member may be provided to be inclined toward the guide hole.

  Further, in the uniform processing apparatus according to an embodiment of the present invention, the nozzle member is provided at an upper end portion of the side wall of the chamber member in order to be positioned above the steel plate, and is provided at a central portion in the width direction of the steel plate. It can be characterized in that it is provided in an inclined manner.

  In the uniform processing apparatus according to the embodiment of the present invention, the nozzle member may be provided in an upper central portion of the chamber member facing an upper surface of the steel plate.

  Further, in the uniform processing apparatus according to an embodiment of the present invention, the nozzle member is provided to adjust a flow rate of the replenishing liquid to be injected in order to adjust a surface treatment speed or pickling strength for the steel plate. It can be characterized by that.

  The pickling apparatus according to another embodiment of the present invention is provided on a path along which a steel plate moves, and is provided with an acid tank unit that provides an acid solution and pickles the steel plate, and is linked to the acid tank unit. And a pickling adjustment unit that adjusts the pickling strength for the steel sheet.

  Further, in the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit is linked to the acid tank unit provided for the steel plate to be immersed and passed through the acid solution, and the steel plate is acidified. A fluid for cleaning adjustment may be ejected.

  Further, in the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit is provided downstream of the acid tank unit in the moving direction of the steel plate, and a replenisher for further pickling is sprayed onto the steel plate. A pickling replenishment unit can be included.

  Moreover, in the pickling apparatus according to another embodiment of the present invention, the pickling replenishment unit may be the uniform processing apparatus.

  Further, in the pickling apparatus according to another embodiment of the present invention, the nozzle member receives the transmission of the information regarding the transfer speed of the steel plate or the information regarding the concentration of the acid solution provided to the acid tank unit, and the transfer It is possible to adjust the flow rate of the replenisher liquid to be injected based on the speed or the information on the concentration, or to stop the injection.

  Further, in the pickling apparatus according to another embodiment of the present invention, the pickling replenishment unit is characterized in that the replenisher injected to the steel plate is a higher concentration acid solution than the acid tank unit. Can do.

  In the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit is connected to the pickling replenishment unit, circulates the replenisher, and receives a supply of new replenisher from the outside. Can be included.

  In the pickling apparatus according to another embodiment of the present invention, the circulation replenishment unit is connected to the nozzle member of the pickling replenishment unit that injects the replenisher onto the steel plate to supply the replenisher, and the steel plate passes. A recirculating chamber member connected to the pickling chamber member of the pickling replenishing section and receiving the transmitted replenishing liquid, and a new replenishing liquid provided from the outside provided in a pipe connected to the circulating chamber member And a control valve member that controls the acidity (pH) of the replenisher inside the circulation chamber member by adjusting the supply amount of the recirculation chamber member.

  In the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit is provided upstream of the acid tank unit in the moving direction of the steel plate, or a plurality of tanks provided in the acid tank unit. A pickling replenishment unit that sprays a replenisher for further pickling on the steel plate, the pickling replenishment unit provided to the acid tank unit or information relating to the transfer speed of the steel plate It is possible to receive information related to the concentration of the acid solution, adjust the flow rate of the replenisher based on the transfer speed or the information related to the concentration, or stop the injection.

  Further, in the pickling apparatus according to another embodiment of the present invention, the pickling tank unit is connected to the pickling adjustment unit, and is provided at the upstream of the pickling adjustment unit in the moving direction of the steel plate. And an acid solution having a higher concentration than the acid solution provided to the low acid tank unit, connected to the low acid tank unit, provided upstream of the low acid tank unit in the moving direction of the steel plate. And a high acid tank part.

  In the pickling apparatus according to another embodiment of the present invention, the acid tank unit is connected to at least one of the low acid tank part and the high acid tank part, and circulates the acid solution. Parts can be included.

  Moreover, the pickling apparatus according to another embodiment of the present invention includes a preheating unit that is connected to the acid tank unit, is provided upstream of the acid tank unit in the moving direction of the steel plate, and preheats the steel plate. it can.

  The uniform processing apparatus of this invention has the advantage that a replenisher can be supplied uniformly with respect to a steel plate, As a result, the pickling speed | rate of a steel plate can be improved. Thereby, there exists an effect that the production amount of a pickling product can be increased. In addition, there exists an effect that the quality of pickling products can be improved by uniform pickling treatment.

  Moreover, the pickling apparatus of the present invention has an advantage that the pickling treatment for a general steel plate and a steel plate of a difficult pickling steel type can be performed quickly by adjusting the pickling for the steel plate for each steel type. it can.

  In particular, according to the required pickling strength, adjusting the pickling strength by the steel type by adjusting only the supply level of the replenisher that further performs pickling on the steel plate that has been initially pickled with an acid solution. Therefore, it is possible to have an advantage that facilities and control for the adjustment can be simplified.

  In addition, since the replenisher is uniformly provided to the steel plate, pickling can be performed uniformly during further pickling treatment to supplement pickling, and as a result, pickling quality can be improved. The effect that can be produced.

  However, various and significant advantages and effects of the present invention are not limited to the above-described contents, and can be more easily understood in the course of describing specific embodiments of the present invention.

FIG. 1 is a front view showing a uniform processing apparatus of the present invention. FIG. 2 is a side view showing the uniform processing apparatus of the present invention. FIG. 3 is a plan view showing the uniform processing apparatus of the present invention. FIG. 4 is a front view showing an embodiment in which the nozzle member is provided on the upper portion of the chamber member in the uniform processing apparatus of the present invention. FIG. 5 is a front view showing a pickling replenishment unit which is a uniform processing device in the pickling apparatus of the present invention. FIG. 6 is a front view showing a pickling replenishment section and a circulation replenishment section in the pickling apparatus of the present invention. FIG. 7 is a conceptual diagram schematically showing the pickling apparatus of the present invention. FIG. 8 is a side view showing the pickling apparatus of the present invention. FIG. 9 is a side view showing the pickling apparatus of the present invention.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the idea of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the idea of the present invention can step back through addition, change, deletion, etc. of other components within the scope of the same idea. Other embodiments included in the scope of the idea of the present invention or the present invention can be easily proposed. However, this is also included in the scope of the idea of the present invention.

  Moreover, the same component with the function within the range of the same thought shown by drawing of each embodiment is demonstrated using the same referential mark.

  One embodiment of the present invention relates to the uniform processing apparatus 100, and can supply a replenisher uniformly to the steel sheet S, thereby improving the pickling speed for the steel sheet S. Thereby, while increasing the production amount of a pickling product, the quality of a pickling product can be improved by uniform pickling treatment.

  Specifically, FIG. 1 is a front view showing the uniform processing apparatus 100 of the present invention, and FIG. 2 is a side view showing the uniform processing apparatus 100 of the present invention. Referring to FIGS. 1 and 2, a uniform processing apparatus 100 according to an embodiment of the present invention is provided in a pickling chamber member 110 provided for passing a steel plate S and the pickling chamber member 110, and the steel plate. The nozzle member 120 that sprays the replenisher liquid onto the central portion of the upper surface in the width direction of S and causes the replenisher fluid to flow from the central portion to the upper surface edge portion of the steel plate S in the width direction, and the above-mentioned that flows down from the upper surface of the steel sheet S. In order to temporarily retain the replenisher, a separation plate member 130 provided in the transverse direction in the pickling chamber member 110 may be included.

  In other words, the replenisher can be uniformly provided to the steel sheet S by adjusting the flow of the replenisher injected to the steel sheet S.

  In particular, when the nozzle member 120 sprays the replenisher onto the center of the upper surface in the width direction of the steel plate S, the replenisher injected in this way flows down to the upper surface edge portion of the steel plate S in the width direction. In addition, the replenisher that has flowed down in this manner is temporarily retained in the separation plate member 130, thereby bringing the replenisher into contact with the lower surface of the steel sheet S.

  Here, the replenisher may be a hydrochloric acid solution. That is, the uniform processing apparatus 100 can be used in a pickling process for removing foreign matters such as scales on the surface of the steel sheet S.

  The pickling chamber member 110 provides a space for the steel plate S to pass through and for performing a pickling process on the steel plate S with the replenisher.

  For this purpose, the pickling chamber member 110 may be formed with a passage hole through which the steel plate S passes and may be provided with a support roll for supporting the movement of the steel plate S.

  A guide roll R for guiding the movement of the steel sheet S may be provided outside the passage hole of the pickling chamber member 110.

  Here, the guide roll R may be configured to be in close contact with the passage hole and prevent the replenisher from being detached through the passage hole of the pickling chamber member 110. The replenisher on the steel sheet S discharged from the pickling chamber member 110 can also be removed.

  The nozzle member 120 serves to inject the replenisher onto the steel sheet S. In particular, the nozzle member 120 can be guided to uniformly supply the replenisher to the entire upper surface of the steel sheet S by spraying the replenisher onto the central portion of the upper surface of the steel sheet S in the width direction. .

  In other words, when the nozzle member 120 supplies the replenisher to the central part in the width direction of the steel sheet S, the replenisher that has been concentrated too much in the central part in the width direction of the steel sheet S is in the width direction of the steel sheet S. It moves toward the edge part. Thereby, it can comprise so that it may spread over the whole upper surface of the said steel plate S. FIG.

  For this reason, when the nozzle member 120 is coupled to the side wall of the pickling chamber member 110, the nozzle member 120 may be provided to be inclined toward the center of the upper surface in the width direction of the steel sheet S. it can.

  That is, in the uniform processing apparatus 100 according to an embodiment of the present invention, the nozzle member 120 is provided at the upper end of the side wall of the pickling chamber member 110 in order to be positioned above the steel plate S, and the steel plate S It is characterized by being provided in a shape inclined toward the center in the width direction.

  Here, the nozzle member 120 may be provided by a circular nozzle having a diameter of about 50 mm for injecting the replenisher, and is about 100 mm higher than the steel plate S. It can be provided on the side wall.

The nozzle member 120 can spray the replenisher at a pressure of about 4 bar or more with a flow rate of 0 to 180 m ³ / hr.

  Meanwhile, in order to supply the replenisher to the central portion of the upper surface in the width direction of the steel sheet S, the nozzle member 120 may be provided at the upper central portion in the pickling chamber member 110. This will be described in detail later with reference to FIG.

  Further, the nozzle member 120 can adjust the supply flow rate to be supplied in order to adjust the pickling speed of the steel sheet S.

  The separation plate member 130 is configured to temporarily stay on the lower surface of the steel sheet S when the replenisher injected from the nozzle member 120 is detached from the upper surface of the steel sheet S. Accordingly, the replenisher can be supplied in contact with the lower surface of the steel sheet S.

  For this, the separation plate member 130 can be provided in the transverse direction in the pickling chamber member 110 and is provided to face the lower surface of the steel sheet S.

  On the other hand, the separation plate member 130 is formed with a guide hole 131 for guiding the replenishment liquid flowing down from the lower surface edge portion in the width direction of the steel plate S to the center portion on the lower surface in the width direction of the steel plate S. Can do.

  In other words, in the uniform processing apparatus 100 according to an embodiment of the present invention, the separation plate member 130 is formed with a guide hole 131 in a portion facing the central portion in the width direction of the steel plate S, and the width of the steel plate S is formed. The flow of the replenisher can be induced at the center of the lower surface in the direction.

  As described above, when the guide hole 131 is formed in the central portion of the separation plate member 130, the replenishment liquid detached from the upper surface of the steel plate S is passed through the guide hole 131 to the lower portion of the pickling chamber member 110. It comes to form a flow to escape.

  At this time, when the guide hole 131 is located at the central portion of the separation plate member 130, the replenishment liquid forms a flow toward the central portion of the separation plate member 130.

  As a result, the replenisher is guided to the center of the lower surface of the steel sheet S in the width direction, so that the replenisher can uniformly contact the lower surface of the steel sheet S.

  Such an improvement in the surface treatment effect due to the uniform contact between the steel sheet S and the replenisher can be confirmed from an example in which the replenisher is a hydrochloric acid solution and the steel plate S is pickled.

  The pickling speed in the experiment is about 250 m / s, and the scale removal amount is a comparison between the weight difference before pickling and the weight difference after pickling divided by the area of the test piece.

  From the above comparison results, in the case of the present invention, it can be confirmed that the removal amount of the scale is increased by about 30% as compared with the prior art.

  Here, the separation plate member 130 may be configured to be inclined toward the guide hole 131 in order to facilitate the flow of the replenisher to move to the guide hole 131.

  In other words, in the uniform processing apparatus 100 according to an embodiment of the present invention, the separation plate member 130 may be provided so as to be inclined toward the guide hole 131. This is as shown in FIG.

  On the other hand, the embodiment shown in FIG. 1A can be referred to for the state in which the separation plate member 130 is installed horizontally. As described above, when the separation plate member 130 is installed horizontally, the retention time of the replenisher can be increased.

  The guide hole 131 is formed in a long slot shape in the length direction of the steel plate S in order to form a uniform flow with respect to the lower surface of the steel plate S passing through the pickling chamber member 110. Can do. A detailed description thereof will be described later with reference to FIG.

  FIG. 3 is a plan view showing the uniform processing apparatus 100 of the present invention. Referring to FIG. 3, in the uniform processing apparatus 100 according to an embodiment of the present invention, the guide hole 131 is provided in the separation plate member 130 in a long slot shape in the length direction of the steel plate S. be able to.

  Accordingly, a uniform flow can be formed on the lower surface of the steel sheet S passing through the pickling chamber member 110.

  In other words, the replenisher that has separated from the upper surface of the steel sheet S is detached from the upper edge portion of the steel sheet S and flows to the lower surface of the steel sheet S including the lower edge portion of the steel sheet S.

  At this time, if the guide hole 131 is provided only on one side in the length direction of the steel sheet S, a difference occurs in the flow rate of the replenisher, and the surface treatment action on the bottom surface of the steel sheet S in the length direction. Even in this aspect, a time difference may occur.

  Therefore, by providing the guide hole 131 in a slot shape that is long in the length direction of the steel sheet S, the replenisher can be guided so that it can flow uniformly in the length direction of the steel sheet S.

  FIG. 4 is a front view showing an embodiment in which the nozzle member 120 is provided in the upper part of the chamber member 110 in the uniform processing apparatus 100 of the present invention. Referring to FIG. 4, in the uniform processing apparatus 100 according to an embodiment of the present invention, the nozzle member 120 is provided at an upper central portion in the pickling chamber member 110 facing the upper surface of the steel plate S. It can be.

  In other words, in order to supply the replenisher to the central portion of the upper surface in the width direction of the steel sheet S, the nozzle member 120 may be provided at the upper central portion in the pickling chamber member 110.

  Specifically, the nozzle member 120 is provided on an upper wall in the pickling chamber member 110 or connected through a connecting pipe provided on an upper side wall in the pickling chamber member 110, and It can be provided in a portion facing the central portion of the steel sheet S in the width direction. FIG. 4A shows an embodiment in which the nozzle member 120 is provided at a portion facing the central portion in the width direction of the steel sheet S via a connecting pipe.

  The nozzle member 120 may be configured such that a plurality of nozzle members 120 are provided in the upper central portion in the pickling chamber member 110 as shown in FIG. In such a case, the replenisher injected from the nozzle member 120 is preferentially applied to the upper surface of the steel sheet S in the width direction by preparing to incline toward the center of the steel sheet S in the width direction. It can flow in contact.

  In the uniform processing apparatus 100 according to an embodiment of the present invention, the nozzle member 120 is sprayed to adjust the surface treatment speed of the steel sheet S or to adjust the pickling strength of the steel sheet S. Provided to regulate the flow rate.

  This is because when the flow rate of the replenisher increases, the surface treatment speed is increased by increasing the contact area or contact time between the surface of the steel sheet S with a new reactive replenisher having good reactivity. The point that can be increased is used.

  Another embodiment of the present invention relates to a pickling apparatus that removes foreign matters such as scales on the steel sheet S. By adjusting the pickling for the steel sheet for each steel type, the general steel sheet S and the hard pickled steel type The pickling process for the steel sheet S can be performed quickly.

  In particular, according to the required pickling strength, the pickling strength by the steel type is adjusted by adjusting only the supply level of the replenisher that further performs pickling on the steel plate S that has been initially pickled with an acid solution. Therefore, the equipment and control for the adjustment can be simplified.

  Specifically, referring to the drawings, FIG. 7 is a conceptual diagram schematically showing the pickling apparatus of the present invention. Referring to FIG. 7, the pickling apparatus according to another embodiment of the present invention includes an acid tank unit 10 that is provided on a path along which the steel sheet S moves, an acid solution is provided, and the steel sheet S is pickled. A pickling adjustment unit 20 that is connected to the acid tank unit 10 and adjusts the pickling strength of the steel sheet S.

  In other words, in order to adjust the degree of pickling by the steel type of the steel sheet S, in addition to the acid tank unit 10, by further providing the pickling adjustment unit 20, pickling by the steel type can be performed quickly.

  Here, the acid tank unit 10 has a configuration in which an acid solution is provided, and is provided so that the steel sheet S can be immersed in the acid solution in the movement path of the steel sheet S and move.

  Thereby, the steel sheet S completes basic pickling while passing through the acid tank unit 10.

  In particular, the acid tank unit 10 is configured to pass through a high acid tank unit 340 provided with a relatively high concentration acid solution first, so that pickling can be performed quickly and no equipment is required. To prevent the enlargement. A detailed description thereof will be described later with reference to FIGS.

  And the said pickling adjustment unit 20 plays the role which further adjusts pickling with respect to the steel plate S in which the initial pickling was performed in the said acid tank unit 10. FIG.

  In other words, the pickling adjustment unit 20 may provide an inhibitor that prevents further pickling on the steel sheet S on which the initial pickling has been performed. A replenisher may be provided.

  In particular, a pickling replenishment unit may be provided as a configuration in which the pickling adjustment unit 20 supplies a replenisher, and the pickling replenishment unit may be the uniform processing apparatus 100 described above.

  And the said pickling adjustment unit 20 can have the advantage that it can respond to pickling adjustment rapidly by providing so that the fluid which adjusts pickling, such as the said inhibitor and replenisher, may be injected.

  That is, in the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit 20 is linked to the acid tank unit 10 provided so that the steel sheet S is immersed and passed through the acid solution, and A fluid for pickling adjustment may be sprayed on the steel sheet S.

  As described above, the acid tank unit 10 is provided with the steel plate S so as to be immersed in the acid solution and affects the steel plate S. Therefore, the acid concentration is changed or a new acid solution is used. In order to replace it, it is necessary to replace the entire acid solution present therein, and there is a limit that the time required is increased. On the other hand, since the pickling adjustment unit 20 affects the steel sheet S by injecting fluid such as the inhibitor or replenisher, the fluid acting on the steel sheet S can be immediately replaced. Have advantages.

  FIG. 8 is a side view showing the pickling apparatus of the present invention. Referring to FIG. 8, in the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit 20 is provided downstream of the acid tank unit 10 in the moving direction of the steel sheet S to further perform pickling. The pickling replenishment part which injects a replenisher to the said steel plate S can be included.

  In other words, the pickling replenishment part plays a role of further performing pickling treatment on a hard pickled steel type that requires further pickling than a general steel type.

  Here, the pickling replenishment unit may be provided in the uniform processing unit 100 described above, and may include features associated therewith.

  As an example, when the replenisher injected from the pickling replenisher is a hydrochloric acid solution, the concentration can be 170 to 210 g / l.

  In addition, when the said pickling replenishment part performs further the pickling process with respect to the steel plate S, it will perform uniform pickling by providing a replenisher uniformly with respect to the steel plate S, and the reliability of a pickling process Can be improved.

  In addition, the pickling replenishment unit adjusts and provides the degree of pickling at the time of supplying the replenishing solution, rather than adjusting only on / off related to whether or not to perform further pickling according to the steel type. Thus, the reliability of the pickling treatment can be improved. A detailed description thereof will be described later with reference to FIG.

  Meanwhile, the pickling replenishment unit may be provided upstream of the acid tank unit 10 in the moving direction of the steel plate S, or may be provided between a plurality of tank units provided in the acid tank unit 10. Here, a low acid tank unit 330 or a high acid tank unit 340 to be described later may be disposed in the plurality of tank units provided in the acid tank unit 10.

  And the structure with which the said pickling replenishment part is provided in the moving direction upstream of the said steel plate S rather than the said acid tank unit 10 can be referred in FIG.

  That is, in the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit 20 is provided upstream of the acid tank unit 10 in the moving direction of the steel sheet S, or provided in the acid tank unit 10. And a pickling and replenishment section 320 that sprays a replenisher that is further provided for pickling to the steel sheet S. The pickling replenishment unit 320 receives information related to the transfer speed of the steel sheet S or information related to the concentration of the acid solution provided to the acid tank unit 10, and is based on the information related to the transfer speed or the concentration. Then, the flow rate of the replenisher can be adjusted, or the injection can be stopped.

  Thus, when the pickling replenishment unit is provided upstream of the acid tank unit 10 in the moving direction of the steel plate S, the pickling replenishment unit determines the degree of pickling for the steel plate S in the acid tank unit 10. In anticipation, it can be provided that a portion of the pickling steel plate S or the like is pickled beforehand.

  The replenisher injected from the pickling replenishment unit can be an acid solution having a higher concentration than the acid solution supplied from the acid tank unit 10.

  That is, in the pickling apparatus according to another embodiment of the present invention, the pickling replenishment unit is characterized in that the replenishment liquid sprayed onto the steel plate is a higher concentration acid solution than the acid tank unit. Can do.

  Here, the replenishment liquid sprayed from the pickling replenishment unit is not limited to the acid solution, but when the steel plate S is further pickled, or when pickling in advance, The replenisher is preferably supplied as an acid solution.

  In other words, the replenisher may supply an acid solution in order to mix the steel plate S of the hard pickled steel type and the steel plate S of a general steel type and actively adjust the pickling in one facility. preferable. In such a case, an acid solution having a higher concentration than the acid solution supplied from the acid tank unit 10 is used as the replenisher.

  Such a high-concentration acid solution is preferable because, when adjusting the degree of pickling, even if a small amount is supplied, the pickling effect is large and easy control is expected.

  Referring to FIG. 8, in the pickling apparatus according to another embodiment of the present invention, the pickling tank unit 10 is connected to the pickling adjustment unit 20, and the steel plate S is more than the pickling adjustment unit 20. A low acid tank unit 330 provided upstream in the movement direction and connected to the low acid tank unit 330, provided upstream of the low acid tank unit 330 in the movement direction of the steel sheet S, and provided to the low acid tank unit 330. And a high acid tank unit 340 provided with an acid solution having a higher concentration than the acid solution formed.

  In other words, the acid tank unit 10 is configured to pass through the high acid tank part 340 provided with a relatively high concentration acid solution preferentially so that pickling can be performed quickly. Make it possible to prevent unnecessary enlargement of equipment.

  That is, conventionally, a relatively high concentration acid solution was provided to a tank provided downstream in the moving direction of the steel sheet S, and a relatively low concentration acid solution was provided to the upstream tank. In the tank provided in the tank, pickling action hardly occurred and it was not efficient. On the other hand, this invention is equipped so that a quick pickling can be implement | achieved by providing the high acid tank part 340 in the moving direction upstream of the steel plate S rather than the low acid tank part 330. FIG.

  And although the low acid tank part 330 is provided with an acid solution having a lower concentration than the high acid tank part 340, it takes a sufficient time when the steel sheet S passes through the high acid tank part 340. Since it does not pass, it plays the role of removing the scale of the part which is not pickled. Therefore, in order to improve the reliability of the pickling process, the pickling process is performed following the high acid tank unit 340.

  As an example, when the acid solution in the high acid tank unit 340 is a hydrochloric acid solution, the concentration thereof may be about 150 to 170 g / l, and the concentration of the acid solution in the low acid tank unit 330 is It can be 130-150 g / l.

  Here, each of the high acid tank unit 340 and the low acid tank unit 330 may use only one acid tank or a plurality of acid tanks. The number of such acid tanks can be selected in consideration of the required pickling process.

  The acid solution having a low concentration due to pickling in the high acid tank unit 340 can be provided to the low acid tank unit 330 and used again, and is supplied to the high acid tank unit from the outside. New high concentration acid solutions can also be provided.

  In other words, in the pickling apparatus according to another embodiment of the present invention, the acid tank unit 10 is connected to at least one of the low acid tank unit 330 and the high acid tank unit 340 to supply the acid solution. A circulation tank unit 350 for circulation may be included.

  That is, due to the structure of the circulation tank unit 350, a higher concentration acid solution is provided to the high acid tank unit 340 than to the low acid tank unit 330.

  For this, the circulation tank unit 350 may include a plurality of circulation tanks, and the circulation tank connected to the high acid tank unit 340 is provided so that a new acid solution is provided from the outside. Thus, the acid solution can be provided at a higher concentration than the low acid tank unit 330.

  A circulation tank connected to the low acid tank unit 330 is provided to receive an acid solution having a low concentration due to pickling in the high acid tank unit 340 and supply the acid solution to the low acid tank unit 330. be able to.

  Accordingly, the high acid tank unit 340 can maintain the acid solution at a higher concentration than the low acid tank unit 330.

  In addition, the circulation tank unit 350 may be connected to a preheating unit 30 described later so as to supply the acid solution to the preheating unit 30. Therefore, the circulation tank unit 350 can provide a circulation tank connected to the preheating unit 30, and the circulation tank connected to the preheating unit 30 can be the low acid tank unit 330 or the high acid unit. The tank unit 340 may be configured to be supplied to the preheating unit 30 after receiving the acid solution after the pickling process is performed.

  That is, the acid solution to be pickled in the acid tank unit 10 is hotter than the steel sheet S flowing into the preheating unit 30, so that the preheating before the steel sheet S enters the acid tank unit 10. Can play a role.

  In this regard, the preheating unit 30 will be described in detail. A pickling apparatus according to another embodiment of the present invention is connected to the acid tank unit 10 and is upstream of the acid tank unit 10 in the moving direction of the steel sheet S. A preheating unit 30 that is provided and preheats the steel sheet S may be included.

  In other words, the preheating unit 30 is provided at a position where the steel plate S is preferentially provided over the acid tank unit 10, so that the steel plate S is preheated before being provided to the acid tank unit 10. be able to.

  Here, the configuration in which the preheating unit 30 performs preheating may use a high-temperature waste acid solution after being used in the acid tank unit 10. For this, it may be provided to be connected to the circulation tank unit 350.

  For example, when the acid solution provided to the circulation tank unit 350 is a hydrochloric acid solution, the concentration may be 20 to 80 g / l.

  However, the configuration in which the preheating unit 30 preheats the steel sheet S is not limited to the above-described configuration, and is directly sprayed with another high-temperature fluid, radiant heating with a hot wire, or directly with a heating torch. It can also be provided in a configuration such as heating.

  FIG. 5 is a front view showing a pickling replenishment unit which is a uniform processing device in the pickling apparatus of the present invention.

  The pickling replenishment unit may be the uniform processing apparatus 100 described above. In addition, when performing the pickling process with respect to the steel plate S, by providing a replenisher uniformly with respect to the steel plate S, uniform pickling is performed and the reliability of the pickling process can be improved.

  In particular, in the pickling apparatus according to another embodiment of the present invention, the nozzle member 120 receives information regarding the transfer speed of the steel sheet S or information regarding the concentration of the acid solution provided to the acid tank unit 10, It is possible to adjust the flow rate of the replenisher to be ejected based on the transfer speed or the information on the concentration, or to stop the ejection.

  This is basic information for the nozzle member 120 to adjust the degree of pickling by the steel type, and information on the transfer speed of the steel sheet S for determining the degree of pickling in the acid tank unit 10, and the acid tank unit 10. Need information on the concentration of acid solution provided. Basically, the replenisher injection flow rate is adjusted as compared with the information on the degree of pickling in the steel type.

  FIG. 6 is a front view showing the pickling replenishment section and the circulation replenishment section 320 in the pickling apparatus of the present invention. Referring to FIG. 6, in the pickling apparatus according to another embodiment of the present invention, the pickling adjustment unit 20 is connected to the pickling replenishment unit to circulate the replenisher and supply a new replenisher from the outside. A circulation replenishment unit 320 may be included.

  The circulation replenishment unit 320 serves to supply a replenisher to the pickling replenishment unit, and adjusts the concentration of the replenishment solution sprayed by the pickling replenishment unit, whereby the nozzle member 120 of the pickling replenishment unit. The reliability of the adjustment of the pickling degree and the adjustment of the pickling degree associated with the flow rate adjustment of the replenisher can be improved.

  For this, the circulation replenishment unit 320 may include a circulation chamber member 321 and a control valve member 322.

  In other words, in the pickling apparatus according to another embodiment of the present invention, the circulation replenishment unit 320 is connected to the nozzle member 120 of the pickling replenishment unit that injects the replenishment solution onto the steel sheet S to supply the replenishment solution, The steel plate S is connected to the pickling chamber member 110 of the pickling replenishment section through which the steel plate S passes, and is provided in a circulation chamber member 321 that receives supply of the injected replenisher, and a pipe connected to the circulation chamber member 321. And a control valve member 322 for controlling the acidity (pH) of the replenisher inside the circulation chamber member 321 by adjusting a supply amount of a new replenisher supplied from the outside.

  The circulation chamber member 321 receives the replenisher from the outside, supplies the replenisher to the pickling replenisher, and collects the replenisher sprayed from the pickling replenisher for reuse. Also plays a role.

  The circulation chamber member 321 is connected to the control valve member 322 and adjusts the concentration of the replenisher supplied to the pickling replenisher by adjusting the flow rate of the replenisher supplied from the outside.

  In other words, when the control valve member 322 is controlled to supply a large amount of new replenisher from the outside to the circulation chamber member 321, the concentration inside the circulation chamber member 321 becomes relatively high, When the pickling replenishment unit that has received such high-concentration replenisher sprays the replenisher onto the steel sheet S, a relatively strong pickling process is performed. Conversely, when the control valve member 322 is controlled to supply a small amount of new replenisher from the outside to the circulation chamber member 321 or to stop the supply, the concentration inside the circulation chamber member 321 will be reduced. When the pickling and replenishing section that has received the transmission of the low-concentration replenisher sprays the replenisher onto the steel sheet S, a relatively weak pickling process is performed.

Claims (19)

A chamber member provided for passing a steel plate;
A nozzle member that is provided in the chamber member, injects a replenisher into the center of the upper surface in the width direction of the steel sheet, and causes the replenisher to flow from the center to the upper edge portion in the width direction of the steel sheet;
In order to temporarily retain the replenisher flowing down from the upper surface of the steel plate, a separation plate member provided in a lateral direction in the chamber member;
Including a uniform processing apparatus.   2. The separator plate according to claim 1, wherein a guide hole is formed in a portion of the separation plate member facing a central portion in the width direction of the steel plate, and the flow of the replenisher is guided to a bottom central portion in the width direction of the steel plate. Uniform processing equipment.   The uniform processing apparatus according to claim 2, wherein the guide hole is provided in the separation plate member in a long slot shape in a length direction of the steel plate.   The uniform processing apparatus according to claim 2, wherein the separation plate member is provided to be inclined toward the guide hole.   The nozzle member is provided at an upper end portion of a side wall of the chamber member so as to be positioned above the steel plate, and is provided to be inclined toward a central portion in the width direction of the steel plate. The uniform processing apparatus as described.   The uniform processing apparatus according to claim 1, wherein the nozzle member is provided in an upper central portion of the chamber member facing an upper surface of the steel plate.   The uniform processing apparatus according to claim 1, wherein the nozzle member is provided so as to adjust a flow rate of the replenisher to be sprayed in order to adjust a surface treatment speed or pickling strength for the steel plate. An acid tank unit that is provided on a path along which the steel plate moves, an acid solution is provided to pickle the steel plate, and
A pickling adjustment unit that is linked to the acid tank unit and adjusts the pickling strength for the steel plate,
Including pickling equipment.   The pickling adjustment unit is linked to the acid tank unit provided for the steel plate to be immersed and passed through the acid solution, and jets a fluid for pickling adjustment to the steel plate. Pickling equipment.   10. The acid according to claim 9, wherein the pickling adjustment unit includes a pickling replenishment unit that is provided downstream of the acid tank unit in the moving direction of the steel plate and injects a replenisher for further pickling to the steel plate. Washing equipment.   The pickling apparatus according to claim 10, wherein the pickling replenishment unit is the uniform processing apparatus according to claim 1.   The nozzle member receives information related to the transfer speed of the steel plate or information related to the concentration of the acid solution provided to the acid tank unit, and supplies the replenisher liquid to be injected based on the information related to the transfer speed or the concentration. The pickling apparatus of Claim 11 which adjusts a flow volume or stops injection.   The pickling apparatus according to claim 10, wherein the pickling replenishment unit is a replenisher that is sprayed onto the steel plate and is a higher concentration acid solution than the acid tank unit.   11. The pickling apparatus according to claim 10, wherein the pickling adjustment unit includes a circulation replenishment unit that is connected to the pickling replenishment unit, circulates the replenishment solution, and receives supply of a new replenishment solution from the outside. The circulation replenishment unit is
The replenisher is connected to the nozzle member of the pickling replenishment unit that injects replenisher onto the steel plate, supplies replenisher, and is transmitted to the pickling chamber member of the pickling replenisher that is passed through the steel plate A circulation chamber member for receiving,
A control valve member that is provided in a pipe connected to the circulation chamber member and controls the acidity (pH) of the replenisher solution inside the circulation chamber member by adjusting a supply amount of a new replenisher solution supplied from the outside; ,
The pickling apparatus of Claim 14 containing this. The pickling adjustment unit is provided upstream of the acid tank unit in the moving direction of the steel plate, or provided between a plurality of tank units provided in the acid tank unit, and a replenisher for further pickling is provided. Including a pickling replenishment section that sprays on the steel sheet,
The pickling replenishment unit receives information related to the transfer speed of the steel sheet or information related to the concentration of the acid solution provided to the acid tank unit, and the flow rate of the replenisher based on the information related to the transfer speed or the concentration The pickling device according to claim 9, wherein the pickling device is adjusted or the injection is stopped. The acid tank unit is
A low acid tank unit connected to the pickling adjustment unit and provided upstream in the moving direction of the steel plate than the pickling adjustment unit;
A high acid that is connected to the low acid tank part, is provided upstream of the low acid tank part in the moving direction of the steel plate, and provides a higher concentration acid solution than the acid solution provided to the low acid tank part A tank section,
The pickling apparatus of Claim 9 containing this.   The pickling apparatus according to claim 17, wherein the acid tank unit includes a circulation tank unit that is connected to at least one of the low acid tank unit and the high acid tank unit and circulates the acid solution.   The pickling apparatus according to claim 9, further comprising a preheating unit that is connected to the acid tank unit, is provided upstream of the acid tank unit in the moving direction of the steel plate, and preheats the steel plate.

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