The two BoVac Disc Filters L176 with a filtration area of each 176 m² are used in a coal preparation plant in Australia for the filtration of flotation coal concentrate. One disc filter has a foot print of approx. 60 m² and replaces one belt filter with a foot print of 200 m² (50 m x 4 m). 

The slurry to be filtered is an ultrafine clean coal slurry (flotation concentrate) with particles of a nominal top size of 300 µm and a nominal feed solids concentration of 38 wt.-%. Each filter has to match varying feed conditions requiring a specific solids throughput of 517 kg/m2/h (nominal) up to 812 kg/m2/h (maximum) with varying feed concentrations ranging from 35 wt.-% to 56 wt.-%

For this performance the filters run with a filter speed of 0.5 rev/min up to 1.7 rev/min. The filters are also capable to match worst case feed conditions with peak feed flow, minimum feed solids concentration and particle sizes of 80% smaller than 130 µm however on the cost of an increased moisture which then ranges to some 30 wt.-%.

In terms of maintenance the filter requires very little input. The majority of the work is changing the polymer filter cloth. With a typical cloth life time of 6 months, every 1.5 months the cloths on one disc are changed. Apart from re-clothing no further extensive work is required. That's why the BoVac Disc filter has a very high availability of > 97%.

BoVac Disc Filter L176

Units installed



Filter area per unit

[ m² ]


Filter speed

[ 1/min ]

0.7 – 4

Material of construction


S 235 JR

Stainless Steel for filtrate pipes and segments

Power of filter drive

[ kW ]


Foot print incl. receiver & tank

[ m ]

9 x 7

Year of commissioning




Process and Operation Data

Solids throughput

[ t DS/h ]

90 - 145

Solids content in feed

[ wt.-% ]

35 – 56

Cake moisture content

[ wt.-% ]

23 – 28

Time of operation



Cloth lifetime


3 - 4

Maintenance demand
incl. cleaning and filter cloth change





> 97


Product Data



Flotation coal concentrate

Medium particle size

[ µm ]


Flocculant dosage

[ g /t DS ]



[ °C ]



Any Questions? One Call is enough.

© 2020 BOKELA GmbH Karlsruhe, Germany
This site uses cookies, Google Fonts, Google Maps, Youtube, and Google Analytics to give you the best experience on our website. If you’re happy to receive all cookies, please click on ‚Agree‘. Further details and information can be found in the data protection declaration and in the imprint.