Engineering and supply of core process equipment for grinding, flotation concentration, and tailings dewatering circuits: Flotation Cell Mechanisms & Conditioners (50 to 300 ft³), Recessed-Chamber Filter Presses (800 to 1500 mm, up to 16 bar), and Complete Horizontal & Vertical Slurry Pump Packages.
CONCENTRATE & DRY TAILINGS FILTRATION • 800 TO 1500 MM
Recessed-Chamber Filter Presses (Up to 16 bar)
Complete heavy-duty structural steel filter presses with automatic electro-hydraulic closure, virgin copolymer polypropylene plate packs, and needle-felt filter cloths for process water recovery and dry-stack tailings.
Process Systems & Wear Replacements by Operating Role
Review required slurry variables, metallurgical selection rules (High Chrome A05, Rubber, or Polyurethane), and the operational risk prevented by each equipment unit or wear lot.
Slurry Pumps Durango Warehouse
Slurry Pump Impeller
4 and 5-vane closed impellers engineered with clearing back-vanes to prevent slurry recirculation and relieve stuffing box pressure.
Process Inputs: Slurry specific gravity (SG), solid concentration by weight (Cw %), d80 particle distribution, and operational slurry pH.
Metallurgy Rule: A05 (650+ HB) mandatory for quartz or silica over 35%. Vulcanized natural rubber mandatory for pH under 4.5 or sodium cyanide solutions with fine solids.
Risk Prevented: Prevents accelerated clearing back-vane erosion and premature pressure loss to classification hydrocyclones.
Centrifugal Expeller & Stuffing Box (No Mechanical Seal)
Dry centrifugal sealing via expeller, expeller ring, shaft sleeve, and stuffing box. No mechanical seals used due to corrosive and abrasive mineral slurries.
Materials:Alto Cromo, Acero Inoxidable y Empaque Trenzado
Compatibility:Universal para marcos C, D, E, F
METALLURGICAL RULE & SLURRY VARIABLES:
Process Inputs: Suction pressure (bar / psi), gland flush clean water availability at positive head, and frother chemical content.
Metallurgy Rule: High Chrome A05 centrifugal dynamic expeller when gland flush water is unavailable in sumps; braided PTFE/graphite stuffing box when positive-pressure gland water is available (no mechanical seal).
Risk Prevented: Eliminates shaft sleeve scoring and bearing contamination caused by slurry ingress through the stuffing box.
Laser-cut mono/multifilament polypropylene cloths with heat-sealed borders and heavy-duty recessed chamber plates.
Materials:Polipropileno Virgen Copolímero y Fieltro Agujado
Compatibility:Cámara empotrada de 800 mm a 1500 mm
METALLURGICAL RULE & SLURRY VARIABLES:
Process Inputs: Plate dimensions (800x800 to 1500x1500 mm), slurry pH, operating slurry temperature (°C), and required cloth permeability (L/dm2/min).
Metallurgy Rule: Monofilament polypropylene cloths with heat-sealed borders for abrasive tailings; multifilament weave for fine flotation concentrates.
Certified ASTM E11 / ISO 3310 Test Sieves & Sieve Shakers
Certified full-height and half-height test sieves with seamless drawn brass or stainless frames, precision tensioned wire cloth, mechanical sieve shakers, and sample splitters.
Materials:Bronce y Acero Inoxidable (8'' y 12'')
Compatibility:Aberturas desde 5'' hasta Malla #635 (20 micrones), tapas y cazuelas
METALLURGICAL RULE & SLURRY VARIABLES:
Process Inputs: Target P80 grind size (microns), sieving method (wet or dry screening), and sieve shaker column diameter (8 or 12 inches).
Metallurgy Rule: Full Stainless Steel frame and mesh mandatory for wet screening and fine meshes (#200 to #635 / 20 microns) to prevent corrosion and sag; Brass available for dry screening.
Risk Prevented: Prevents false P80 readings from sagged or torn meshes that cause costly overgrinding or mineral liberation losses in flotation.
Heavy-duty horizontal centrifugal slurry pumps for abrasive and corrosive slurries in grinding, classification, flotation, and tailings.
Power / Pressure:30 HP a 250 HP
Capacity:50 a 1,200 m³/h
ENGINEERING CRITERIA & LIMITS:
Process Inputs: Design flow rate (m3/h), total dynamic head TDH (m), slurry specific gravity (SG 1.1 to 1.7), d80 particle sizing (microns), and mine elevation above sea level.
Selection Rule: Specify drive train with minimum 1.35 service factor. High Chrome A05 for coarse angular slurries; vulcanized rubber for fine solids under 5 mm with flotation reagents.
Risk Prevented: Prevents skid torsional vibration, shaft deflection, and premature bearing overheating under slurry surge startup conditions.
Flotation Cell Mechanisms & Conditioners50, 100, 200 y 300 ft³ (1.4 a 8.5 m³)
Flotation Cell Mechanisms & Conditioners
Cylindrical and rectangular cell tanks built from structural steel plate with chemical/abrasion-resistant rubber lining, adjustable frothing weirs, and dart valves.
Power / Pressure:15 HP a 60 HP por mecanismo
Capacity:Circuitos de 200 a 1,500 t/d
ENGINEERING CRITERIA & LIMITS:
Process Inputs: Daily processing throughput (t/d), slurry solids density (%), target kinetic residence time (min), and bank role (Rougher/Scavenger/Cleaner).
Selection Rule: Structural plate tank (6 to 10 mm) with hot-vulcanized internal abrasion rubber lining. Dart valves with pneumatic or manual positioning.
Risk Prevented: Prevents heavy solids sanding at tank bottoms and premature froth weir erosion due to pulp turbulence.
Heavy-duty press systems for concentrate dewatering and dry tailings management, featuring reinforced sidebars, automatic plate shifting, and cloth washing.
Power / Pressure:Presión electrohidráulica de hasta 16 bar
Capacity:Tiempos de ciclo de 20 a 45 minutos
ENGINEERING CRITERIA & LIMITS:
Process Inputs: Slurry feed volume (t/h), initial solids percentage, and target cake residual moisture (< 15% for geotechnical dry stacking).
Selection Rule: Recessed chamber and membrane squeeze plates for secondary compression. 10 to 16 bar filtration pressure with heavy-duty structural sidebars.
Risk Prevented: Prevents wet unstable filter cakes unsuitable for dry stacking and excessive cycle discharge downtime.
Process ControlVaso de 1000 cm³ + 12 carátulas intercambiables (SG 2.2 a 4.4)
Pulp Density & Percent Solids Scale (Marcy Type)
Direct-reading hanging pulp density and percent solids scale with calibrated 1000 cm³ stainless steel or acrylic container and 12 interchangeable dial rings (SG 2.2 to 4.4).
Power / Pressure:Operación gravimétrica directa sin energía eléctrica
Capacity:Muestreo instantáneo en descarga de molino, ciclones y flotación
ENGINEERING CRITERIA & LIMITS:
Process Inputs: Dry ore specific gravity (Ss from 2.2 to 4.4), expected percent solids range by weight (Cw 15% to 75%), and circuit sampling point.
Selection Rule: 1000 cm3 304 stainless steel container with overflow slots and bottom plug for abrasive grinding slurries; clear acrylic container for fine flotation pulps.
Risk Prevented: Prevents reagent overdosing, hydrocyclone roping/sanding, and biased percent solids readings when ore specific gravity shifts.
Process ControlCámara cilíndrica vertical de banco o piso con cierre rápido en T
SMAT Laboratory Batch Pressure Filter
Heavy-duty batch pressure filter for metallurgical laboratories and plant control, featuring thick-walled steel barrel, top T-bar screw clamp, twin guide rods, and bottom filtrate port.
Power / Pressure:Aire comprimido de planta (60 a 100 psi / 4 a 7 bar)
Capacity:Desaguado rápido de muestras metalúrgicas de 1 a 15 litros
ENGINEERING CRITERIA & LIMITS:
Process Inputs: Slurry sample volume (liters), available plant compressed air pressure (60 to 100 psi), and fineness of concentrate or tailings sample.
Selection Rule: Flanged heavy steel or stainless barrel with neoprene/viton O-ring seals and filter paper or polypropylene cloth media.
Risk Prevented: Eliminates slow vacuum filtration bottlenecks and prevents ultrafine solids loss that skews assay grades and metallurgical balances.
Anonymized engineering records based on real mineral slurry operating conditions in Sierra Madre Occidental mining districts (Durango, Zacatecas, Chihuahua).
Slurry PumpingDurango Mining District (1,200 t/d)
PLANT SLURRY CONDITION:
Ball mill discharge slurry at 52% solids by weight, specific gravity 1.68, d80 180 microns angular silica solids. Pre-existing impellers suffered severe hydrodynamic erosion within 20-22 operational days.
WEAR PART INSTALLED & SHOP FIT:
Installation of 5-vane closed High Chrome A05 impeller (665 HB hardness) with dynamic balancing verified in Durango shop test bench and external axial clearance set to 0.75 mm.
MEASURED GAINS & DOWNTIME AVOIDED:
Operating campaign extended to 54 continuous days with sustained cyclone classification head. Unscheduled monthly maintenance shutdowns reduced by 2.5 events.
Mineral FlotationZacatecas Mining District (800 t/d)
PLANT SLURRY CONDITION:
100 ft³ flotation cell banks in a lead-zinc sulfide circuit. Severe stator wear and shaft vibration from aggressive collector reagents causing diminished silver metallurgical recovery.
WEAR PART INSTALLED & SHOP FIT:
Supply of complete suspended mechanism with 4140 alloy steel shaft, double spherical bearings, and high-modulus molded rubber rotor-disperser assembly.
MEASURED GAINS & DOWNTIME AVOIDED:
Homogeneous bubble induction across cell volume and 11% motor power reduction. Verified +1.4% increase in metallurgical concentrate recovery.
Tailings FiltrationUnderground Mining Operation in Chihuahua
PLANT SLURRY CONDITION:
Operational transition to dry stack tailings. High ultrafine slime content (< 35 microns) in tailings slurry causing rapid cloth blinding and wet, uncompactable filter cakes (> 19% moisture).
WEAR PART INSTALLED & SHOP FIT:
Filtration package optimization featuring 16 bar membrane squeeze plates and laser-cut heat-sealed monofilament polypropylene filter cloths.
MEASURED GAINS & DOWNTIME AVOIDED:
Residual cake moisture reduced to 12.8%, enabling immediate dry stack geotechnical compaction and recovery of 140 m³/day of clarified process water.
