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INCREASING SEPARATION EFFICIENCYWITH THE LSVS CLASSIFIER

Key features of theLSVS classifier

With an improved velocity profile, the patented vortex rectifier and the classifying gap the LSVS classifier will reduce the differential pressure across the mill signifi-cantly. In addition to the improved process characteristics several optimized mechani-cal properties are implemented. The mechanical properties are optimized with the aim to ensure an easy maintenance and high availability of the machine.In addition the table at the mill is improved with a table modification to establish the correct process conditions needed for the classifier LSVS.

Production

Effi ciency Availability

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Benefi ts• Reduced of specifi c energy consumption

by approx. 10%

• Increased capacity by approx. 10%

• Increased availability

• Lower wear rate

• Optimized fl uid dynamics

Installation / CommissioningApprox. 10 days Installation

Approx. 5 days commissioning Return on invest< 2 Years

• Reduced pressure loss by approx. 5%

• More homogenous filter pressuration

• Wear reduction

• Reduced pressure drop across the mill by approx. 5%

• Less gas volume• Increase of classifying efficiency

• Enhanced classifier efficiency and less power consumption of classifier by approx. 10%

• Higher stability of grinding bed leads to better grinding efficiency

Rotor modular design:• Protecting Blades• Easy to assemble/maintain• Higher stiffness of rotorBearing cartridge redesigned:• Load distribution into the frame via lower fixed bearing

Flo w pro f ile w it h LSVS

Flo w pro f ile w it h LSVS

1. Vortex Rectifi er

2. Velocity Profi le

3. Classifying zone

4. Mechanical improvements

Return on invest for reference plant LM 56.4

Benefi ts of reference plant LM 56.4

MILL DATAMilltype: Rawmill Capacity (current): 505.00 t / hCapacity increase: 10%New capacity: 555.50 t / hOperating hours: 7000 h / aSpecific energy consumption: 13.7 kWh / t current value for mill driveEnergy consumption: 48,429,500 kWh / t classifier drive and mill fan

SAVINGSEnergy savingsCost of electricity: 0,050 € per kWhSpecific energy savings: 1.44 kWh / tSavings per year: 254,255 €Additional ShutdownCurrent shutdown: 2 h / dNew shutdown: 4 h / dAdditional shutdown: 778 h / aEnergy savings: 5,919,161 kWh / aCost savings: 295,958 € / aTotal savings: 550,213 €

COSTSTotal costs: 800.000 € (for complete modification, excluding installation costs)

Financial dataCapital costs: 3% The payback time is less than 2 years!NPV after 1 year: -265,812.69 €NPV after 2 years: 252,815.77 €NPV after 3 years: 756,338.54 €

Reference plant LM 56.4

Reference list for LDC/LSVS classifi er installed worldwide

Loesche retrofits with LSVS classifier in the recent years

Country Mill type Product Classifier

Thailand LM 56.4 rawmeal LSVS

Thailand LM 46.2+2 C/S Clinker – OPC LSVS

India LM 56.3+3 C/S Clinker – PPC LSVS

India LM 38.3 rawmeal LSVS

Germany LM 41.4 rawmeal vortex rectifier modification

Turkey LM 46.4 rawmeal LSVS

India LM 53.3+3 C/S Clinker – OPC LSVS

Worldwide more than 100 mills are equipped with the newest generation of classifier for rawmeal, clinker and slag grinding vertical roller mills.

For further information such as detailed scope of supply and quotations the Customer Service Sales department can be contacted under:

LOESCHE GmbH– Customer Service Sales –Hansaallee 243D-40549 Düsseldorf, Germany

Phone +49 - 211 - 5353 - 0Fax +49 - 211 - 5353 - 500Email customerservice@loesche.dewww.loesche.com