CISDI’s intelligent energy conservation model is enabling Ningbo Steel’s HSM descaling system to make substantial energy savings.

It works in conjunction with the basic automation system for intelligent control of the descaling frequency-conversion pump.

Ningbo Steel’s HSM had been installed with five descaling pumps - three operational and two on standby. The pumps had been working with a line frequency and were generating substantial power loss during the roll change and rolling idle time.

CISDI upgraded one of the constant-frequency high-pressure water descaling pumps to a frequency-conversion pump.

The automation model can automatically calculate parameters and formulate an accurate operation mode for the descaling pump by combining the PDI data, rolling schedule and strip speed and tracking the strip positions.

During a month-long pilot run, electricity consumption per tonne of steel was reduced by 4.9kWh, a remarkable economic benefit. Compared with last year’s average monthly, peak month and leanest month data, usage was down by 43.36%, 56.76% and 26.44%, respectively.

The application at Ningbo adds another successful energy-saving renovation reference to CISDI’s achievement record. The new production development platform, quality analysis system and other intelligent hot mill core products have previously been used by Yanshan Steel and at other plants.

The average monthly electric consumption per tonne of steel in 2017