The Italcementi quarry
SPECIALIST EQUIPMENT
Smart drives optimise process performance in very harsh environments DRIVES DELIVER F
earless of the diffi cult conditions– mainly dust and bad weather – an innovative drive system was chosen to ensure effi cient production of
800,000 tons of hard limestone at the Roussas quarry. With an annual cement production capacity of 60 million tons and 42 cement plants across four continents, Italcementi Group is a leading global supplier of construction materials. T e group is a major player in the French building- material market; in the cement business through Ciments Calsia, in the ready-mix concrete sector through Unibéton and in aggregates production and supply with GSM. Italcementi has a strong focus on
innovation and sustainable construction materials. T e fi rm saw many synergies with Danfoss and decided to invest in 31 VLT AutomationDrives to control the speed of industrial applications such as conveyors belts, water pumps, agitators and crushers in the GSM Aggregates limestone quarry in Roussas, France. T e three main goals of the investment
were to: reduce energy consumption; optimise productivity; and reduce the risk of malfunction by removing the need for long cables.
OPTIMISED PERFORMANCE IN ALL CONDITIONS Quarries are notorious for being harsh environments, with dust, noise, extreme temperature variations and vibration frequent occupational hazards. T e VLT AutomationDrive’s broad range of enclosure sizes and protection ratings from
T e size of control cabinets could Drive in harsh environment
IP20 to IP66 made it easy to install the drives outdoors, directly on the frame of the applications, which ensured reliable operation in the quarry’s harsh conditions. Previous drives used at the site had
a relatively low power range and, being placed in protective cabinets, meant that signifi cant costs associated with their cooling were incurred. T e VLT AutomationDrive’s control algorithm, its over-torque of 160%, power range up to 1.4MW and versatility made it suitable for the range of applications on site. And the fact that its RFI fi lter and harmonic chokes are integrated in the IP66 housing ensured protection of the electronics. In addition, because the drives are cooled by ambient air, they no longer encounter overheating problems, which will enable tangible energy savings. T e confi guration of the installation meant that the drives could be installed in the immediate vicinity of the motors, which simplifi ed infrastructure management and development costs.
be reduced, and high-performance fi eldbus options installed in the VLT AutomationDrive enabled connection to EtherNet/IP-based networks, which simplifi ed cabling. “T e VLT drives are certifi ed IP66 and can withstand extreme conditions, including water and dust. T is makes them perfect for our environments and diffi cult applications. T rough the installation, we saved energy, gained in effi ciency and productivity and acquired a new fl exibility of use, which directly benefi ts our operational teams,” comments Paulo Pereira, automation manager for France and Belgium, GSM- Unibéton -CCB “Danfoss teams supported us
throughout the confi guration and installation phase by providing a single point of contact for all our sites, which greatly simplifi ed the everyday relationship.”
ACCURATE PERFORMANCE ANALYSIS T e drive contains many integrated sensors that can extremely accurately monitor daily site activities. Frequent and relevant performance records can be generated that indicate where energy savings at all levels can be made. T e qualities and performance of
the drive allowed Italcementi to rethink the automation of its facilities, particularly with regard to the water pumps that are spread across all their sites. T ey can now be fully controlled by the drives.
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