Krauss-Maffei gypsum centrifuge VZU-G

The Krauss-Maffei gypsum centrifuge VZU-G is most suitable for desulfurization of flue gases from coal-fired heat/ power plants, waste incinerators, and copper smelters. Washing the flue gas with limestone slurry is the most successful method and generates reusable gypsum.

The development of many different processes for desulfurization of flue gases from coal-fired heat and power plants started more than four decades ago.

Washing the flue gas with a limestone slurry became established as the most successful method. Efficient dewatering provides gypsum slurry as an end product with good reusability. High purity levels and low residual moisture are best obtained using Krauss-Maffei vertical centrifuges. ANDRITZ KMPT has extensive experience in gypsum dewatering, as well as in corrosion and wear protection as it has over 400 machines operating successfully worldwide. Continuous improvements to our machines guarantee reliability and maximum efficiency.



Mining & Minerals

Flue gas desulphurization (FGD), metal refining

Processing parameters

Average particle size20-100 µm
Feed solids concentration10-70 % by wt.
Solids throughputup to 10 t/h
Basket diameter1,000-1,600 mm
Basket volume220-1,300.0 l

Krauss-Maffei centrifuges outperform belt filters

When it comes to gypsum dewatering, Krauss-Maffei vertical basket centrifuges offer major advantages over belt filters. The benefits include significant cost savings, lower cake moisture, lower power consumption, reduced floor space requirements, cleaner and quieter processing, and less spare installed capacity. Even under irregular plant conditions, Krauss-Maffei centrifuges will continue to perform.

Dewater gypsum with centrifuges and save millions in energy costs

There is simply no contest between the money-saving opportunities of Krauss-Maffei vertical basket centrifuges against belt filter installations when dewatering gypsum. A 20-year life-cycle study of a typical 600-900 MW power plant (60 TPH gypsum) shows that using Krauss-Maffei vertical basket centrifuges instead of belt filters generated over € 12 million in total cost savings.

Clean, quiet processing means a better work environment

A centrifuge is a clean, totally enclosed system that minimizes housekeeping requirements and eliminates exposure to vapors and dust. The centrifuges also operate quietly (<80 dBA), providing an operator-friendly environment.

Krauss-Maffei VZU-G installation

Installation with 42 VZU-G

Centrifuges provide greater reliability and thus require less spare capacity

Krauss-Maffei vertical basket centrifuges’ simple, rugged design increases reliability in day-to-day operations compared to belt filters. This means that spare capacity requirements are minimized. To assure 99.5%+ availability, only one spare machine is needed for every 6 operating machines. Belt filters typically require 50-100% installed capacity to maintain the same reliability.

Centrifuges require less space

For any given throughput, a centrifuge installation requires only 1/3 the floor space of a belt filter installation. When space is limited, this can be an enormous advantage. With scrubber retrofit installations, for example, this space difference may avoid demolition and relocation of existing plant components.

Dimensions and weight

ModelL [mm]W [mm]H [mm]Weight [kg]
Max. speed [rpm]*
VZU 100/2.0 G1.8001.5502.2004.3001.200
VZU 125/3.2 G2.0201.8002.4805.200900
VZU 160/ 5.0 G2.7002.4003.15011.500800
VZU 160/ 6.3 G.29002.4403.1513.000800
VZU 1000/2.01.0006302202,0870
VZU 1250/3.21.2508005003,2630
VZU 160/ 5.0 G1.6001.0001.0005,0570
VZU 160/ 6.3 G1.6001.2501.3006,3570

*) Density of saturated cake 1,750 kg/m³at T = 50°C
When using specific materials it is possible to increase the permissible speed of rotation and g-values respectively.
All technical data are approximate and subject to change without notice

Gypsum centrifuge VZU-G operational video

Find out more ...

Contact us
ANDRITZ Separation GmbH
Get in contact
  • Krauss-Maffei gypsum centrifuge VZU-G PDF : 1 MB