Filter Press vs Decanter Centrifuge for Tailings (2026)

By Senjie Filter Press Engineering Team · Last updated: 2026-09-10

Quick answer: For mining tailings, a filter press typically delivers 15-30% cake moisture versus 65-80% moisture (20-35% dry solids) from a decanter centrifuge, at a power draw of about 5-15 kWh per tonne of dry solids versus 8-25 kWh/t for a centrifuge. Filter presses suit dry-stack targets below 20-25% moisture; centrifuges suit high-throughput, continuous bulk dewatering where moisture targets are less strict.

Mining operations choosing between a filter press and a decanter centrifuge for tailings dewatering are really choosing between two different cost and moisture profiles. This comparison lays out cost per tonne of dry solids, moisture output, power consumption, and where each technology wins.

How do filter presses and decanter centrifuges compare for tailings dewatering?

A filter press uses mechanical pressure (0.6-1.6 MPa, up to 2.0 MPa with membrane squeeze) applied across cloth-covered plates in a batch cycle, while a decanter centrifuge uses continuous centrifugal force to separate solids from liquid. The two technologies land in different places on moisture, power, and labor, summarized below.

What is the cost per tonne of dry solids for each technology?

Cost per tonne of dry solids for a filter press typically runs $3-8 per tonne when power, cloth replacement, and labor are included at moderate utilization, while a decanter centrifuge typically runs $4-9 per tonne once power, wear parts, and polymer conditioning cost are included. The two are often within 10-20% of each other; the deciding factor is usually moisture requirement, not raw cost per tonne.

• Filter press cost drivers: electricity for the hydraulic pump (roughly 5-15 kWh/t), filter cloth replacement every 3-12 months depending on abrasion, and labor for plate shifting on manual units.
• Centrifuge cost drivers: continuous motor power draw (8-25 kWh/t), flocculant/polymer dosing cost, and bowl and scroll wear from abrasive tailings, which can be significant with high-silica ores.

Abrasive, high-silica tailings tend to raise centrifuge wear-part cost faster than they raise filter press cloth cost, shifting the economics toward filter presses for hard-rock tailings streams.

Which technology gives drier tailings for dry-stack storage?

A filter press is the standard technology where dry-stack tailings storage requires moisture content below 20-25%, because chamber presses typically achieve 40-55% moisture and membrane or automatic membrane filter presses cut that by a further 10-15 percentage points to 15-30%. A decanter centrifuge alone typically leaves tailings at 65-80% moisture, which is generally too wet for stable, walkable dry-stack piles without further treatment.

Many large mines run a hybrid circuit: a centrifuge or thickener handles bulk volume reduction first, then a filter press polishes the underflow to final dry-stack specification. This combination can lower overall power cost compared with running a filter press alone on the full tailings volume.

How does power consumption compare at scale?

At a nominal 100 tonnes of dry solids per day, a filter press circuit typically consumes 500-1,500 kWh/day, while an equivalent decanter centrifuge circuit typically consumes 800-2,500 kWh/day, largely because centrifuges run continuously at full motor load whereas a filter press only draws significant power during the pressing and closing phase of each batch cycle.

Sites with high electricity cost or limited grid capacity, common in parts of Africa, Latin America, and remote mine sites, often favor filter presses partly for this lower average power draw, in addition to the moisture benefit.

What about capital cost and footprint?

For throughputs below roughly 20-30 tonnes of dry solids per hour, a filter press system generally has a lower installed capital cost than a comparable decanter centrifuge system with feed conditioning and polymer dosing infrastructure. Above that throughput, the compact, continuous nature of centrifuges can become more capital-efficient per tonne, though moisture output still favors the filter press for dry-stack requirements.

Filter press footprint scales with the number of plates needed for batch cycle capacity, so very high-throughput plants sometimes install multiple presses in parallel, feeding from a common progressing cavity pump or slurry pump station.

Why buy this from Senjie?

Senjie is a China-based manufacturer of filter presses and dewatering equipment, founded in 2014 and exporting to 40+ countries including mining markets across Africa, Latin America, and Southeast Asia. Senjie supplies chamber and membrane filter presses sized from 630 mm to 2000 mm plates for tailings and concentrate dewatering, matched with abrasion-resistant filter press cloth and slurry feed pumps to handle hard-rock tailings streams.

Guidance on tailings management practice is also available from the International Council on Mining and Metals, whose Global Industry Standard on Tailings Management covers dewatering and storage considerations referenced by many operators.

Frequently Asked Questions

Which is cheaper to run, a filter press or a decanter centrifuge, for tailings?

A filter press typically has lower power draw per tonne of dry solids (5-15 kWh/t vs. 8-25 kWh/t for a decanter centrifuge) but higher labor and cloth replacement cost, while a decanter centrifuge has higher power and wear-part cost but lower labor per tonne. Total cost per tonne is usually similar within 10-20%, with the deciding factor being cake moisture requirements.

Which produces drier tailings, a filter press or a centrifuge?

A membrane or automatic filter press typically produces drier cake, 15-30% moisture, versus 65-80% moisture (dry solids content 20-35%) for a decanter centrifuge on fine tailings. Filter presses are the standard choice where dry-stack tailings or zero-discharge targets require moisture below 20-25%.

Can a decanter centrifuge replace a filter press for dry stacking?

In most cases no, because a decanter centrifuge alone rarely reaches the below-20% moisture typically required for stable dry-stack tailings storage. Many operations use a centrifuge for bulk pre-thickening followed by a filter press as a final polishing step to hit dry-stack specifications.

Which has a lower capital cost, a filter press or a centrifuge, at the same throughput?

For throughputs under about 20-30 tonnes of dry solids per hour, a filter press generally has a lower capital cost than an equivalent decanter centrifuge system with feed conditioning. Above that throughput, centrifuges often become more capital-efficient per tonne due to their continuous, compact design.

Does particle size affect the filter press vs centrifuge choice for tailings?

Yes. Fine, clay-rich tailings with high plasticity dewater more reliably in a filter press with the right filter cloth, while coarser, sandy tailings with good settling characteristics are often well suited to a decanter centrifuge. Blended or variable tailings streams sometimes need bench testing to confirm the right technology.

Not sure which technology fits your tailings stream? Contact Senjie’s engineering team for a bench-test recommendation.