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Title

CLOSED-LOOP CONTROL OF COLD TEMPERATURE AND PROCESS IMPROVEMENT ON THE HIGH SPEED-WIRES EQUIPMENT

Authorship

Wujianjun,

Wujianjun,

I am this author

DOI

10.5151/9785-9785-32503

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Abstract

In the process of wire rod production, the rolled wire products must be cooled from the red-hot state to the normal temperature state. How to cool the wire rod after rolling is one of the key links of product quality control in the whole wire rod production process. In this paper, combined with the closed-loop transformation project of controlled cooling temperature of Xuanhuan iron and steel group co., LTD., the closed-loop related controlled cooling equipment (including water cooler, valve table, etc.), nozzle layout and process layout of water tank, and closed-loop software control system of controlled cooling temperature of high-line are analyzed and designed. Closed-loop system design USES temperature of cooling water cooling and water cooling two temperature closed loop regulating circuit, through temperature feedback and feedforward to achieve the uniformity of temperature adjustment, in order to prevent occur due to temperature closed loop control function with the phenomenon of a steel before and after the temperature difference is bigger, system Settings have "absolute temperature regulation" and "relative temperature regulation" selection mode. The system has a self-learning mode, which can modify the temperature feed forward formula. In addition, this paper takes the hard wire 82B rod as the test object, and studies the process parameters and the comprehensive mechanical properties of the rod before and after the water cooling system reform. The research results show that the temperature closed loop system, can ensure the rolled piece temperature control precision of plus or minus 10 ℃, enhances the stability of wire rod cleaner performance. It can reduce water consumption by about 186m3/h and improve the utilization rate of cooling water.

Keywords

high speed-wires cold temperature closed-loop improvement