Bevel-helical gearboxes B2 following formula J iN J The mass moments of i B2-HV6A

Flender/Flender Gear Units/Bevel-helical gearboxes B2

MVR mill so that both units could be optimally adapted to each other. With the MultiDrive , the required drive power of 1,5 kW was made possible in the first place. It has proven successful in industrial operation since 2 and was fitted with frequency converters to drive the Barroso mill in order to adapt the mill speed to the various product qualities. The combination MVR mill/MultiDrive has revolutionized the vertical mill technology not only with its high drive power but also thanks to additional unique features such as six grinding rollers and six drive modules each of which can be taken out of the system separately for maintenance purposes while operation is going on with at least 8% of nominal grinding capacity. Such high rate of plant availability unequaled so far was another criterion in the customers decision for the MVR mill. In fact, with the two-mill concept considered as an alternative, the customer would have had to accept significantly increased capital expenditure and 5% drop of grinding capacity during downtime of one of the two mills, with no active redundancy of rollers and drives, unlike on the MVR mill and MultiDrive . Source: Paper by Juliano Menezes de Melo, LafargeHolcim Germany gebr-pfeiffer HB series gearbox Gebr. Pfeiffer SE Barbarossastr. 5-5 6 Kaiserslautern, Germany Tel.: +4 9 6 4 0 Fax: +4 9 6 4 2 info Siemens Flender gebr-pfeiffer HB series gearbox ustomer: LafargeHolcim Brazil Pr oject: Barroso, Brazil Plan /Machines: Biggest cement grinding plant in the world with vertical mill MVR 6 -6 and MultiDrive Mat erial to be ground: slag cement hroughput rate: 4 tph Finene ss: 4,3 cm2/ (Blaine)Project data:Results and benefits The mill has been producing to the full satisfaction of LafargeHolcim since April 2. In his lecture he gave in Fort Lauderdale in December 2, Juliano Menezes de Melo (Barroso Plant Manager) confirmed the extraordinarily smooth run of the MVR mill. Moreover, he was impressed by the high flexibility of the plant, allowing the produ