Plate and Frame Filter Press

High Filtration Pressure for Low Cake Moisture

The hydraulic clamping system applies filtration pressures of 0.6–1.6 MPa across the full filter plate area, forcing water through the filter cake and cloth far more effectively than gravity or vacuum filtration methods. This high-pressure filtration consistently achieves filter cake moisture contents of 15–25% for most mineral concentrates and chemical slurries — significantly lower than thickener underflow or vacuum filter discharge — reducing downstream drying costs, improving product handling characteristics, and meeting strict moisture specifications for concentrate transport and smelting feed requirements.

Membrane Squeeze for Ultra-Low Cake Moisture

The optional membrane squeeze configuration applies additional mechanical pressure of up to 1.6 MPa directly to the filter cake surface after the initial filtration phase, physically squeezing residual pore water out of the cake structure without requiring additional filter cloth area or filtration time. This membrane squeeze step reduces final cake moisture by a further 3–8 percentage points below the standard recessed plate result, achieving cake moisture contents as low as 10–15% for fine concentrate slurries — critical for concentrate export specifications and energy-efficient downstream drying.

Fully Automatic Operation with Minimal Labor

The fully automatic configuration integrates automatic hydraulic plate clamping, automatic feed pump control, automatic membrane squeeze sequencing, automatic plate shifting for cake discharge, automatic filter cloth washing, and automatic re-clamping for the next filtration cycle — all controlled by a PLC with a touch-screen operator interface. This full automation eliminates the manual labor of opening plates and discharging cake that is required in manual filter press operation, reducing operating labor to a single shift supervisor role and enabling continuous 24-hour production with minimal personnel.

Wide Chemical & Temperature Compatibility

Polypropylene filter plates and polypropylene or PTFE filter cloths provide excellent resistance to acids, alkalis, and most organic solvents across the pH range 1–14 and operating temperatures up to 90°C, covering the full range of mineral processing, chemical, and pharmaceutical filtration environments without special corrosion protection measures. Stainless steel plate options extend compatibility to high-temperature applications up to 120°C and highly oxidizing chemical environments where polypropylene plates are not suitable.

High Filtrate Clarity, Minimum Solid Loss

The tightly woven filter cloth retains fine solid particles down to 1–5 μm depending on cloth weave specification, producing a clarified filtrate with suspended solids content typically below 100 mg/L — suitable for direct discharge to tailings pond, return to process water circuits, or further treatment for discharge to environment. The closed plate cavity design prevents solid bypass around the filter cloth edges, minimizing solid loss in the filtrate and maximizing filter cake yield per filtration cycle.

Modular Design, Easy Capacity Expansion

Additional filter plates can be added to the existing press frame up to the maximum design plate count without replacing the hydraulic clamping system, feed manifold, or press frame structure, increasing filtration area and capacity in proportion to the number of plates added. This modular capacity expansion capability allows plant filtration capacity to be increased incrementally as ore throughput grows, protecting the initial capital investment and avoiding the large lump-sum capital expenditure associated with replacing the entire filter press unit with a larger machine.