The invention relates to an apparatus (10) for the thermal treatment of metallic products, which comprises (a) a support and transport plane (24) for locating and advancing a product to be treated; (b) at least one collector module (12) comprising (b-1) at least one collector (14, 16), the collector (14) being provided with (b-1.1) a perforated plate (22) on that side of the collector (14) which is facing the support and transport plane (24); (b-2) a conduit (20) connected to said at least one collector (14) for feeding it with a fluid, and (b-3) integrated in said conduit (20), at least one stop valve (18), in particular an on-off valve, to permit or preclude the flow of said fluid into said at least one collector (14). The stop valve (18) is situated at a distance from the collector (14) which does not exceed 60 cm, preferably does not exceed 35 cm, and still more preferably does not exceed 10 cm. The perforated plate (22) is provided with holes (36) which are arranged in rows (38) parallel to each other but not in parallel rows with respect to the sides (22a, 22b) of said perforated plate. The of an acute angle (13).

In a facility for cold rolling a metal strip in a circulating oil-feeding system by jetting a low concentration coolant, in a neighborhood of an inlet side of a work roll and jetting a high concentration coolant at an upstream side of the jetting position of the low concentration coolant to conduct rolling, the metal strip is cold rolled with the cold rolling facility provided with a control equipment for varying a jetting amount of the low concentration coolant in accordance with a rolling rate so that a tip of a liquid pool of the low concentration coolant formed on a surface of a steel sheet at an inlet side of the work roll does not reach a jetting position of the high concentration coolant, whereby the rolling can be performed without losing a plate-out property even if the rolling rate is decreased.

To cool a metal strip (1), liquid coolant (5) is supplied to the strip by a supply device (9) from a feed line (10). A valve (13) in the feed line (10) sets the valve (13) to a respective opening position (s) for adjusting the coolant flow (F) to the metal strip (1) per unit of time. An upstream condition detection device (14) upstream of the valve device (13) in the feed line (10) detects an upstream condition (ZV) of the coolant (5). A control unit (6) determines a set point (s*) for an opening position (s) of the valve device (13) corresponding to the set point (F*) for the coolant flow (F) based on a set point (F*) for the coolant flow (F*), the upstream condition (ZV) of the coolant (5) and a valve characteristic (C) of the valve device (13). The valve characteristic (C) follows a characteristic curve (K) of the coolant flow (F) as a function of the opening position (s) of the valve device (13), relative to a reference condition (ZR) of the coolant (5) upstream of the valve device (13) in the feed line (10). The control unit (6) sets the opening position (s) of the valve device (13) according to the set point (s*) that has been determined.

A piercing machine includes a plurality of skewed rolls, a plug, a mandrel bar and an outer surface cooling mechanism. The outer surface cooling mechanism is disposed around the mandrel bar at a position that is rearward of the plug, and with respect to an outer surface of a hollow shell advancing through a cooling zone which has a specific length in an axial direction of the mandrel bar and which is located rearward of the plug, as seen from an advancing direction of the hollow shell, the outer surface cooling mechanism ejects a cooling fluid toward an upper part of the outer surface, a lower part of the outer surface, a left part of the outer surface and a right part of the outer surface of the hollow shell to cool the hollow shell inside the cooling zone.

The invention relates to a rolling apparatus for rolling a rolled material, and to a method for operating the rolling apparatus. The rolling apparatus has two rolling stands, which each have two working rolls distanced from one another by a nip, through which the rolled material can be guided. In a first operating mode, a lubricant mixture, formed of a carrier gas and a lubricant, and coolant are applied to at least one working roll of a first rolling stand and/or to at least one rolled material surface of the rolled material. In a second operating mode, a skin pass agent is applied to at least one working roll of the first rolling stand, at least one working roll of the second rolling stand and/or at least one rolled material surface of the rolled material.

For a rolled metal strip, in particular a steel strip; a drive roller unit deflects the metal strip from a first transportation direction to a second transportation direction, and the strip is then fed to a coiler. The metal strip is coiled in the coiler to form a coil having a coil diameter. Plastic deformation of an end portion of the metal strip is caused such that the end portion in its uninfluenced state is curved at a curvature radius. The plastic deformation of the end portion (8) is at least partially caused by an asymmetric impingement with a cooling medium (21) on the sides of the end portion (8). The impingement of the end portion (8) with the cooling medium (21) is performed across a length of the end portion (8) that is longer than half the outermost coiling of the coil (6) but smaller than the outermost coiling of the coil (6).

To cool a metal strip (1), liquid coolant (5) is supplied to the strip by a supply device (9) from a feed line (10). A valve (13) in the feed line (10) sets the valve (13) to a respective opening position (s) for adjusting the coolant flow (F) to the metal strip (1) per unit of time. An upstream condition detection device (14) upstream of the valve device (13) in the feed line (10) detects an upstream condition (ZV) of the coolant (5). A control unit (6) determines a set point (s*) for an opening position (s) of the valve device (13) corresponding to the set point (F*) for the coolant flow (F) based on a set point (F*) for the coolant flow (F*), the upstream condition (ZV) of the coolant (5) and a valve characteristic (C) of the valve device (13). The valve characteristic (C) follows a characteristic curve (K) of the coolant flow (F) as a function of the opening position (s) of the valve device (13), relative to a reference condition (ZR) of the coolant (5) upstream of the valve device (13) in the feed line (10). The control unit (6) sets the opening position (s) of the valve device (13) according to the set point (s*) that has been determined.

According to an embodiment of the invention, a descaling system is provided that includes multiple descaling headers, a common pipe, a connection pipe, a pump, a drive device, a branch pipe, a valve, and a control device. The multiple descaling headers are provided in a rolling line. The common pipe is connected to each of the multiple descaling headers. The connection pipe is connected to the common pipe. The pump is connected to the connection pipe and supplies high pressure water to each of the multiple descaling headers via the connection pipe and the common pipe. The drive device controls the driving of the pump. The branch pipe is connected to the connection pipe. The valve is provided in the branch pipe and controls the opening/closing of the branch pipe. The control device includes a data collector, a pressure calculator, a pump controller, and a protector. The data collector collects common pipe pressure information indicating the pressure inside the common pipe, rolling material position information indicating the position on the rolling line of a rolling material, and rolling material property information indicating a material property of the rolling material. The pressure calculator calculates the pressure inside the common pipe to satisfy the desired scale removal performance for the rolling material based on the common pipe pressure information, the rolling material position information, and the rolling material property information. The pump controller calculates the operation pattern of the pump to maintain the calculated pressure inside the common pipe and inputs the operation pattern to the drive device. The protector calculates the operation amount of the valve based on the operation pattern and controls the opening/closing of the valve according to the operation amount. Thus, a descaling system, a control device of the descaling system, and a method for controlling the descaling system are provided, in which higher energy conservation is realized and the descaling system has a long life while maintaining the scale removal performance of the descaling system.

A temperature control system used for cooling a rolling mill product is provided. The temperature control system includes a plurality of isolation valves that are directly coupled to one or more water boxes. At least one pump is coupled to the isolation valves. The at least one pump provides the pressure needed for cooling. The isolation valves are positioned to reduce the time required to build up pressure for cooling and reducing the metallurgical property transition length of the rolling mill product.

A method for determining the temperature of a metal strip (1) inside a cooling apparatus (4) of a hot rolling installation is implemented by an electronic device (12). This method includes acquiring a temperature measure of a strip portion at a current time instant; estimating, at the current time instant, a heat flux extracted from the strip portion inside the cooling apparatus according to a thermal model, and computing a strip portion temperature at a next time instant from the acquired temperature measure and the estimated extracted heat flux. The thermal model models an air cooling of the strip portion, a coolant header cooling of the strip portion by a coolant header and a remaining coolant cooling of the strip portion, wherein for the coolant header cooling the model models both an impingement cooling of the strip portion and a parallel flow cooling of the strip portion.