Ceramic disc filter with a full set of auxiliaries (СDF)

Intended use:
Dewatering of suspensions with high solids concentrations (55 to 70%) for applications requiring dried sludge at minimum operating costs and high capacity due to large filter areas. This filter type is an optimum solution for limited floor spaces.

Industries:

Mining
Metallurgical
Chemical

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Description
Characteristics

Principle of operation:
The CDF filter is based on ceramic filter elements – sector-shaped plates installed on the filter shaft. When the shaft rotates, the microporous filter elements are immersed in pulp, where filter cake is formed by capillary forces. The vacuum pump discharges filtrate from the sector element cavity via the main discharge lines.
This technology enables to filter as many solids as possible and minimize the air flow, which significantly reduces power consumption for vacuum maintenance.
The dewatered cake is removed from the filter element surface by ceramic knife blades. Once the cake is discharged, the backwash system feeds a small amount of water into the sector element to activate the filtering surface.
The filters feature an ultrasonic and acid filter element regeneration system to maximize their cleaning effectiveness.

Marking:
CDF – Ceramic Disc Filter
Index – filtering area
CDF-90 – Ceramic disc filter with a filtering area of 90 m2

Options:
Acid Station
Filtrate Station
Acid Regeneration Effluent Neutralization Station

High specific capacity

1.5-5 times higher than that of similar vacuum and press filters
Large filter area per unit of occupied space
Average concentrate moisture content is 8-10 %

Energy saving

Energy consumption is 6-10 times lower compared to vacuum fabric and press filters
Concentrate drying operation can be avoided
Minimization of investments in consumables, auxiliary equipment
No filter cake blowing

Reduction of operating costs

Reduction of filter element replacement costs
No abrasive wear of parts in the filtrate discharge system
Minimum operational and regular maintenance requirements
High corrosion resistance of the filter structure

Continuity of operation

Reduction of conveyor equipment costs
High filter availability — 98%
High capacity of the filtering area

Filtrate clarity and raw material saving

Lossless filtration of finely ground concentrates with 0.040mm size class content of up to 99%
High filtrate clarity: solids content of 0.001 to 0.005 g/l
Use of filtrate in closed-loop water-recycling systems and reduction of water consumption by 30 to 50%
Reduction of polymer flocculant consumption in thickeners

Environmental efficiency

No aerosol emissions in the filter operating area due to the avoidance of filter cake blowing
Clear filtrate that does not pollute production facilities and the environment.

Operational efficiency

Significant reduction of operating costs
Easy to assemble and maintain
Continuous operation and automation
Compact and simple filter design featuring low specific content of metal, ease of installation, interchangeability of all filter elements
Patented plant shaft (drum) design ensures maximum consistency of operation
100% protection of the cake formation and dewatering zones from the ingress of backwash water or filtrate
Vacuum control in the cake formation and dewatering zones
Backwash pressure control
Bath and agitator design ensures uniform mixing of high-density concentrates

Specifications		CDF-0.5	CDF-30	CDF-90	CDF-95	CDF-108	CDF-140
Filtering area	m²	0.5	30	90	95	108	140
Number of disks	ea.	1	6	15	16	18	14
Filter dimensions
Length	mm	975	4,850	6,900	7,200	8,100	7,500
Width	mm	995	3,910	3,400	3,400	3,400	4,200
Height	mm	1,280	3,300	3,345	3,345	3,345	4,500
Installed power	kW	5.0	40	55.0	55.0	55.0	75
Filter weight (dry)	t	0.21	11.5	17.5	18.8	22.0	26.5