High-Pressure Dry Stack Tailings Filter Press with 10-15% Moisture Content and PLC Automatic Operation for 100-800m² Filter Area

The XMGZ series high-pressure dry stack tailings filter press is engineered to meet the most stringent tailings dewatering requirements in modern mining operations. With Mexico’s regulatory framework increasingly restricting wet tailings impoundments and driving adoption of dry stack tailings (DST) technology, this membrane filter press delivers tailings filter cake moisture content of 10-15%, producing a stable, stackable solid material that eliminates the need for conventional tailings dams. The XMGZ series is purpose-built for 24/7 continuous operation in demanding mining environments typical of Mexico’s Sonora, Chihuahua, and Zacatecas mining regions, where water conservation is a critical operational and environmental priority.

Dry stack tailings technology represents the future of responsible tailings management, offering superior geotechnical stability compared to saturated tailings deposits, significantly reduced water consumption through process water recovery rates exceeding 90%, and a dramatically smaller environmental footprint. The XMGZ filter press achieves these benefits through a two-stage filtration cycle: initial feed pressure filling at 0.6-0.8 MPa followed by membrane squeeze at 1.2-1.6 MPa, which applies uniform mechanical pressure across each filter chamber to expel interstitial water from the cake. The resulting filter cake is handleable, transportable by conveyor or truck, and suitable for dry stacking in engineered surface deposits with geotechnical factors of safety exceeding regulatory minimums. The PLC-controlled automatic plate shifting system enables hands-free cake discharge with cycle times as short as 15 minutes for optimized throughput.

• Ultra-Low Cake Moisture for Dry Stacking: The membrane squeeze technology achieves 10-15% residual moisture in tailings filter cakes, exceeding the recommended maximum moisture content of 18-20% for safe dry stacking in accordance with ICMM and MAC tailings management guidelines. The resulting cake exhibits high angle of repose and geotechnical stability for engineered dry stack deposits.
• Maximum Water Recovery for Arid Operations: Operating in water-scarce regions such as Sonora and Chihuahua demands maximum process water recovery. The XMGZ filter press recovers over 90% of the water contained in the tailings feed slurry, producing filtrate clarity of <50 ppm suspended solids suitable for direct recirculation to the concentrator process water circuit without additional treatment.
• Heavy-Duty Hydraulic System: The 20-28 MPa hydraulic closing and holding system maintains uniform plate sealing pressure throughout the entire filtration cycle, eliminating bypass leakage that can cause filter cloth damage and inconsistent cake moisture. Hydraulic components are sourced from internationally certified suppliers with spare parts availability throughout Mexico and Latin America.
• PLC Automatic Operation: The integrated Siemens PLC control system with 12-inch HMI touchscreen automates all cycle phases including plate closing, feed filling, membrane squeeze, core blowing, plate opening, and cake discharge. Recipe-based programming allows storage of optimized parameters for different ore types and tailings characteristics.
• Wear-Resistant Filter Plates: Filter plates are manufactured from reinforced polypropylene with a service temperature rating of up to 80°C and resistance to pH 2-12 process conditions. The extended chamber depth design (30-45mm) provides larger cake volume per cycle, reducing the number of plates and overall equipment footprint.
• Quick-Drain Filtrate Manifold: Individual filtrate drainage ports on each filter plate connect to a common collection manifold with large-diameter piping that prevents filtrate back-pressure buildup, maintaining consistent filtration driving force across all chambers for uniform cake formation.

The XMGZ dry stack filter press is purpose-designed for tailings dewatering in precious and base metal mining operations. Primary applications include silver and gold tailings dewatering at Mexican operations transitioning from conventional tailings dams to dry stack disposal in compliance with NOM-141-SEMARNAT-2003 and evolving PROFEPA enforcement standards. The equipment is particularly effective for flotation tailings from Ag-Pb-Zn-Cu circuits where the tailings particle size distribution (typically 60-80% passing 75 microns) is well-suited to pressure filtration. Secondary applications include dewatering of gold CIP/CIL tailings, copper flotation tailings, iron ore magnetic separation tailings, and fine coal preparation plant refuse. The XMGZ is also deployed in concentrate dewatering applications where low moisture content (<8-10%) is required for shipping and smelter acceptance. The PLC control system enables customizable filtration profiles for different tailings types, optimizing cycle parameters for maximum throughput and minimum residual moisture.

Each XMGZ filter press undergoes complete factory assembly, hydraulic system pressure testing at 1.25x maximum working pressure, and a full-cycle operational test with water before disassembly for shipment. Filter plates are individually inspected for dimensional accuracy and surface finish. The equipment is shipped with the main frame and hydraulic system in a heavy-duty steel crate, filter plates individually wrapped and packed on pallets, and the PLC control cabinet vacuum-sealed with desiccant. Comprehensive documentation includes P&ID drawings, electrical schematics, hydraulic circuit diagrams, installation manual, and operation & maintenance manual in both English and Spanish. Our commissioning engineers provide on-site supervision of installation, filter cloth selection optimization, cycle parameter tuning, and operator training. A 12-month warranty covers all mechanical, hydraulic, and electrical components from the date of successful commissioning.