摘要:
To cool a strip rolled by a hot rolling mill using cooling banks installed on the run out table at the delivery side of the hot rolling mill, and to control the strip temperature in front of coiler to a preset target temperature, the strip is conceptually divided into segments or cooling units which have a length equal to the length of a single cooling bank, the temperatures of the segments are predicted, and the cooling banks are so controlled as to have the prediction temperatures coincide with preset target temperature. In this case, a feed-forward control of the cooling water flow rate in the cooling banks are made so that predictive temperatures on a real time basis of the temperatures of the cooling segments at the time when the segments are staying in the respective cooling banks coincide with the target temperatures.
摘要:
A detail thermal model memory has stored detail thermal models each including a mathematical formula using parameters describing a temperature variation of a rolling material in a prescribed cooling interval, an influence coefficient calculator calculate an influence coefficient as necessary for a control of temperature variation of the rolling material, a simple cooling pattern calculator calculate a simple cooling pattern in a simplified form of a preferable detail cooling pattern being necessary for the rolling material to have a preferable material quality, strength, or ductility, a detail cooling pattern calculator calculate a detail cooling pattern of the rolling material in the prescribed cooling interval, and a cooling controller takes the detail cooling pattern as a basis to control a cooling of the rolling material.
摘要:
A control device for the purpose of achieving highly precise rolled material. The response and robust stability of the rolled material tension and looper height are specified, and a controller is designed so that the rolling mill main motor and looper operate in concert to suppress variations in rolled material tension, thereby achieving stable optimum control which is responsive to the rolling state and rolling conditions.
摘要:
A certain embodiment includes a setting calculator (31), an energy use calculator (32), a manufacturing carbon dioxide emission amount calculator (33), and an optimizer (35). The setting calculator (31) operates to depend on an initial size, an initial temperature, and a target temperature of a rolling material (120), to calculate a control setting value for services of a hot rolling mill (100) to mill the rolling material (120). The energy use calculator (32) operates to depend on a control setting value, to calculate a use of energy as a necessary energy for services of the hot rolling mill (100) to mill the rolling material (120). The manufacturing carbon dioxide emission amount calculator (33) operates to depend on a carbon dioxide emission coefficient and a use of energy, to calculate an emission amount of carbon dioxide emitted at the hot rolling mill (100). The optimizer (35) operates to calculate a target temperature to be a temperature equal to or higher than a requisite temperature for the rolling material (120) to be milled with a secured quality, as a temperature to minimize either or both of use of energy and emission amount of manufacturing carbon dioxide.
摘要:
An electricity demand prediction system includes electricity usage data collection means, production schedule storage means, model creation means, and short-term electricity demand prediction means. The electricity usage data collection means collects electricity usage data of each device and causes electricity usage data storage means to store the collected electricity usage data. The model creation means creates an electricity amount calculation model of each prescribed product type for each device on the basis of the electricity usage data stored in the electricity usage data storage means and a past production schedule stored in the production schedule storage means. The short-term electricity demand prediction means computes future electricity demand for each device on the basis of the electricity amount calculation model created by the model creation means and a future production schedule stored in the production schedule storage means.
摘要:
A control apparatus of a rolling mill includes a load top/bottom distributor distributing loads as top and bottom side loads, a load top/bottom variation identification mechanism identifying load variation components occurring in connection with a rotational position of rolls from the top and bottom side loads, and top/bottom identified load variation storage storing, for each rotational position of rolls, top and bottom side variation components of the load in a kiss-roll condition identified by the load top/bottom variation identification mechanism. A manipulated variable computer computes a roll gap instruction value based on the top and bottom side variation components of the rolling load identified by the load top/bottom variation identification mechanism, and the top side variation component and the bottom side variation component of the load in a kiss-roll condition stored in the top/bottom identified load variation storage.
摘要:
A strip threading speed controlling apparatus for a tandem rolling mill is constructed to calculate a speed set value of two adjacent rolling stands by using a forward slip predicted considering a back tension without considering a front tension in an upstream-side rolling stand thereof, and a forward slip predicted without considering the tension in a downstream-side rolling stand, and to calculate the speed set value of each rolling stand by shifting the rolling stands stage by stage.
摘要:
An electricity demand prediction system includes electricity usage data collection means, production schedule storage means, model creation means, and short-term electricity demand prediction means. The electricity usage data collection means collects electricity usage data of each device and causes electricity usage data storage means to store the collected electricity usage data. The model creation means creates an electricity amount calculation model of each prescribed product type for each device on the basis of the electricity usage data stored in the electricity usage data storage means and a past production schedule stored in the production schedule storage means. The short-term electricity demand prediction means computes future electricity demand for each device on the basis of the electricity amount calculation model created by the model creation means and a future production schedule stored in the production schedule storage means.
摘要:
A cooling water usage predictor predicts, for a respective prescribed prediction cycle T1, a usage of cooling water in a prescribed prediction target period T2, a constrained running condition predictor takes the predicted usage of cooling water as a basis to predict a required running condition of a pump system in the prediction target period T2 meeting a prescribed constraint condition, an energy consumption calculator takes the predicted running condition of the pump system as a basis to calculate a quantity of energy to be consumed, an optimizer determines an optimal quantity of energy to be consumed among a plurality of quantities of energy to be consumed under changed running conditions of the pump system, and a pump system running controller controls a running of the pump system having as a target value therefore a running condition of the pump system requiring the optimal quantity of energy to be consumed.
摘要:
A process line control apparatus which controls a process line including an annealing furnace (3) including a heating process apparatus executing a heating process and a cooling process apparatus executing a cooling process, the heating and cooling processes being continuously executed on a steel material, the apparatus having feed forward control means (112, 113) for measuring quality of the steel material by a material quality measuring apparatus (6) installed in an inlet stage (1) preceding the heating process in the annealing furnace (3), and on the basis of measurement results, determining modifications for respective temperature set values set by temperature setting means (111) for the heating and cooling apparatuses in the annealing furnace (3), and feedback control means (114, 115) for measuring the quality of the steel material by a material quality measuring apparatus (7) installed in an outlet stage (5) succeeding the cooling process in the annealing furnace (3), and on the basis of measurement results, determining modifications for the respective temperature set values set by the temperature setting means (111) for the heating and cooling apparatuses in the annealing furnace (3).