scholarly journals Simulation model of PI controller for the header flux control of ultra-fast cooling in hot strip mill

2018 ◽  
Author(s):  
Xudong Li ◽  
Fang Xu ◽  
Shuzhi Wang ◽  
Bo Gong ◽  
Changli Zhang ◽  
...  
Keyword(s):  
Simulation Model ◽  
Pi Controller ◽  
Hot Strip Mill ◽  
Flux Control ◽  
Ultra Fast Cooling ◽  
Hot Strip ◽  
Fast Cooling

Study on Ultra Fast Cooling Technology in Hot Strip Mill

2011 ◽  
Vol 418-420 ◽  
pp. 1635-1639 ◽  
Author(s):  
Liang Gui Peng ◽  
Xian Ming Zhao ◽  
Di Wu ◽  
Yang Gao ◽  
Zhong Ping Zhang ◽  
...  
Keyword(s):  
Cooling System ◽  
Value Added ◽  
Cooling Capacity ◽  
Laboratory Research ◽  
Cooling Power ◽  
Hot Strip Mill ◽  
Ultra Fast Cooling ◽  
Circular Nozzle ◽  
Hot Strip ◽  
Fast Cooling

With advanced high-strength steels and high value-added steels development, it is very important to improve the cooling capacity and cooling intensity of the run out table cooling system. The key technology is to break the vapor between hot strip and cold water and to increase the direct contact area. In order to realize the ultra fast cooling, Laboratory research such as jet nozzle type selection and diameter of nozzle decision and factory tests such as cooling capacity testing have been done. Experiment results show that circular nozzle has bigger hitting power than fan-type nozzle. However, drainage capacity caused by fan-type nozzle is better than that by circular nozzle. In addition, nozzles of different diameters have nearly the same cooling capacity despite of the very different water flow. Cooling power testing results show that cooling capacity is enhanced with pressure increasing and with speed decreasing.

Development of Ultra Fast Cooling Variable Frequency Control System in Hot Strip Mill

2012 ◽  
Vol 442 ◽  
pp. 199-203 ◽  
Author(s):  
Liang Gui Peng ◽  
Yang Gao ◽  
Xian Ming Zhao ◽  
Di Wu ◽  
Zhong Ping Zhang ◽  
...  
Keyword(s):  
Control System ◽  
Frequency Control ◽  
Cooling Capacity ◽  
Hot Strip Mill ◽  
Variable Frequency ◽  
Ultra Fast Cooling ◽  
Hot Strip ◽  
Frequency Control System ◽  
Fast Cooling ◽  
Variable Frequency Control

With advanced high-strength steels and high value-added steels development, it is urgent to innovative run out table cooling line in hot strip mill with flexible cooling capacity to meet products metallurgical requirements of the cooling rate after rolling. The way to increase the cooling capacity is to improve the effect of heat exchange of water forced convection with hot strip. Then to raise the spraying pressure to penetrate the residual water and break the vapor inside it is the most feasible method. So, how to control the variable frequency device providing variable spraying pressure is the object of this study. Firstly, cooling after rolling process requirement under ultra fast cooling was analyzed; secondly, characteristic curves of centrifugal pump and water supply pipeline were tested; then inverter timing control, interlock control, security control and so on were studied. Since online application of the variable frequency control system, the water supply system has been running stably and reliably

Advanced run-out table cooling technology based on ultra fast cooling and laminar cooling in hot strip mill

2012 ◽  
Vol 19 (5) ◽  
pp. 1341-1345 ◽  
Author(s):  
En-yang Liu ◽  
Liang-gui Peng ◽  
Guo Yuan ◽  
Zhao-dong Wang ◽  
Dian-hua Zhang ◽  
...  
Keyword(s):  
Hot Strip Mill ◽  
Laminar Cooling ◽  
Ultra Fast Cooling ◽  
Hot Strip ◽  
Fast Cooling ◽  
Cooling Technology

Control and application of cooling path after rolling for hot strip based on ultra fast cooling

2013 ◽  
Vol 20 (7) ◽  
pp. 1805-1811 ◽  
Author(s):  
Guo Yuan ◽  
Zhen-lei Li ◽  
Hai-jun Li ◽  
Zhao-dong Wang ◽  
Guo-dong Wang
Keyword(s):  
Ultra Fast Cooling ◽  
Cooling Path ◽  
Hot Strip ◽  
Fast Cooling

scholarly journals An Expert PI Controller with Dead Time Compensation of Monitor AGC in Hot Strip Mill

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Fei Zhang ◽  
Shengyue Zong ◽  
Xiang Wang ◽  
Xiaohuai Ren
Keyword(s):  
High Speed ◽  
Process Model ◽  
Dead Time ◽  
Pi Controller ◽  
Smith Predictor ◽  
Hot Strip Mill ◽  
Hot Strip Rolling ◽  
Long Distance ◽  
Hot Strip ◽  
Finishing Mill

Hot strip rolling production is a high-speed process which requires high-speed control and communication system, but because of the long distance between the delivery stand of the finishing mill and the gauge meter, dead time occurs when strip is transported from the site of the actuator to another location where the gauge meter takes its reading, which seriously affects the thickness control effect. According to the process model which is developed based on the measured data, a filtered Smith predictor is applied to predict the thickness deviation of the finishing mill. At the same time, an expert PI controller based on feature information is proposed for the strip thinning during looper rising and coiler biting period and the strip thickening during the tension loss period of the strip tail end. As a result, the thickness accuracy has been improved by about 1.06% at a steady rolling speed and about 1.23% in acceleration and deceleration.

Modernization of the hot strip mill at Kobe Steel

1990 ◽  
Vol 87 (1) ◽  
pp. 79-88
Author(s):  
K. Hirata ◽  
Y. Yamamoto ◽  
Y. Ohiké ◽  
J. Sato ◽  
S. Honda ◽  
...  
Keyword(s):  
Hot Strip Mill ◽  
Hot Strip

Hot-rolled strip re-reddening temperature changing law for late ultra fast-cooling in a CSP line

2015 ◽  
Vol 112 (3) ◽  
pp. 305 ◽  
Author(s):  
Lian-yun Jiang ◽  
Guo Yuan ◽  
Jian-hui Shi ◽  
Yue Xue ◽  
Di Wu ◽  
...  
Keyword(s):  
Rolled Strip ◽  
Hot Rolled Strip ◽  
Ultra Fast Cooling ◽  
Fast Cooling ◽  
Hot Rolled
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