Aerzen Screw Compressors in ArcelorMittal’s beam rolling mill COMPRESSED-AIR PRODUCTION IN A CHALLENGING ENVIRONMENT Two oil-free Delta Twin DTS 35 WG screw compressors are used in ArcelorMittal’s largest beam rolling mill. They ensure a safe production in spite of pressure drops in the distribution system, together with a turbo compressor, superordinated control unit and absorption drier. Compressed-air unit installation with two Aerzen Delta Twin (front) The records of three compressors Dipl. Ing. Pol Philippe, Maintenance ArcelorMittal Differdange: »Due to the close cooperation with Aerzen Systems, the unit fulfills all our requirements in this challenging operational environment.«The rolling mill, which is situated in the Differdange, Luxembourg plant of ArcelorMittal, a worldwide leader in the coal and steel industry, has a greatly fluctuating consumption of compressed-air. Production is ensured only if the pressure drops caused by short-term large withdrawals are duly compensated for. Interception of pressure dropsAerzen’s objective was to complement an existing turbo compressor with two additional fast reacting oil-free compressors, in order to compensate for these pressure drops both quickly and efficiently. Both Delta Twin DTS 35 WG compressors (3,142 m3/h, 6.5 bar, 355 kW) fulfill these requirements exactly due to their large control range and short start-up period, with simultaneously high volume flow. In order to ensure a suitably energy-efficient compressed-air production, a superordinated control option was selected through which the Turbo compressor and both Aerzen compressors could be combined into an intelligent compressed-air production unit. An absorption drier protects the process against the effects of humidity and the risk of external pipes freezing in winter. Moreover, challenging installation conditions had to be considered in order to ensure a safe operation, including the high dust load in the rolling mill.Planning by Aerzen SystemsAfter the planning phase had been completed by Aerzen Systems, the unit was taken into operation at the end of 2011, in close co-operation with the maintenance department of the rolling mill.Due to its slow control and long preparation time the Turbo compressor handles the base load. One of the Delta Twin compressors balances out the peaks, while the second one provides redundancy. However, to ensure constant utilisation and extended maintenance intervals, the screw compressors alternate every 24 hours.Production ensuredInitial minor difficulties during commissioning were resolved thanks to Aerzen Systems. Since then, the unit has fulfilled the projected requirements and is easily able to balance the high volume flow differences. On the advice of Aerzen Systems, in the future any partly large withdrawal quantities will be additionally intercepted by a sufficiently dimensioned buffer. The unit is also supplemented by a refrigeration drier during the summer months in order to save additional energy.
Pleasant and Successful Co-operation For the first time in Aerzener Maschinenfabrik’s company history, the engineering for a VMY compressor package has been carried out in Aerzen, within a recently completed and very successful process gas project. Our subsidiary, Aerzen USA, was responsible for the project management, the packaged unit assembly and start-up.A packaged unit, specially designed for the American market, is the oil-injected compressor, type VMY 436 B. This machine differs from the established Aerzen standard in a number of essential respects. The customer, Tesoro, a leading company in the American energy industry, stipulates that components have to originate mainly from American manufacturers.The design process was the result of close team- work between Aerzen USA and the design management unit of the Process Gas Division (PGD). In consultation with possible suppliers, the components were integrated into a 3D model of the entire unit. Installation and a functional test of the packaged unit were carried out by a qualified American packager under the leadership of Aerzen USA and the department PGD.
Spare Parts: Better Take the Original! Aerzen original spare parts are specially designed for the compressors and blowers of Aerzener Maschinenfabrik. Consequently, they provide a high degree of reliability and safety. In addition, Aerzen After Sales Service offers warranty, a large inventory and a quick identification of the correct parts as well as short delivery and response times. In short: Confidence is good – Original is better!
30th Anniversary of Aerzen USA In September, Aerzen USA celebrated its 30th anniversary. Before the start of the official events to mark this anniversary, a “National Sales Meeting” took place. All representatives from environmental engineering, as well as employees of Aerzen Canada and Aerzen Mexico, were invited. Nearly 60 staff members participated in this conference, such that nearly every agent and almost every Federal State in the U.S. had been represented. This underlines the strong market presence and significance of Aerzen USA. During the two-day conference, the product programme of Blower, Hybrid and Turbo had priority. Special attention was also given to a new test bench at Aerzen USA, and a live presentation of a Hybrid and a Turbo package was given.The anniversary events included an “Open House” day, as well as an evening event for employees. Aerzen USA welcomed more than 200 guests to this event, mainly customers and suppliers, but also a number of local business leaders.The culmination of the anniversary events was the first “North American Service Meeting” which took place the following week in the premises of Aerzen USA.
40th Anniversary of Aerzen Machines Limited Aerzen Machines Limited, based in Loughton, Essex, celebrated its 40th anniversary in November. This subsidiary is responsible for the whole of the United Kingdom and Ireland, and is certified as per ISO 9001:2008, ISO 14001 and OHSAS 18001 and checked by UVDB, SAFE Contractor, PICS. The subsidiary has been acknowledged as an ‘Investor in People’.In recent years, the company has invested heavily in personnel, and in organisational and technical matters. Product managers are responsible for the following fields: process gas, biogas and compressed air. In addition, a new grinding and painting machine has been installed and a special test bench has been developed.
Aerzen Andina in New Premises In July, Aerzen subsidiary Aerzen Andina, which was founded in 2007, moved into its new premises near the Andean metropolis of Bogota in Colombia. The availability of more space, and better working conditions, convinced Managing Director Ricardo Castillo to make this move. Eleven employees work at the 650 m2 new premises and they take care of customers from Peru, Bolivia, Ecuador, Venezuela and Colombia in respect of blowers and compressors. Castillo is optimistic, that the additional capacity will be fully utilised within five years. At present, Aerzen Andina is working on comprehensive plans to pro- vide even better support to the key customers in the neighbouring countries
