Probability Vibrating Screen with 50-300TPH Capacity Anti-Clogging Polyurethane

The GLS series probability vibrating screen is a high-capacity classification solution engineered for the demanding throughput requirements of Brazilian mineral processing operations. Utilizing the probability screening principle where progressively inclined deck angles generate material stratification by particle size probability, this equipment achieves classification capacities of 50-300 TPH while occupying 30-40% less floor space than conventional horizontal vibrating screens of equivalent capacity. The multi-deck configuration (2-5 decks) enables simultaneous production of multiple size fractions in a single pass, reducing circuit complexity and capital equipment count in iron ore, bauxite, and aggregate processing plants.

The probability screening principle distinguishes the GLS series from conventional screens: each successive deck is mounted at a steeper inclination angle than the deck above it, typically ranging from 15° at the top deck to 30° at the bottom deck. This increasing slope generates higher material travel velocity on lower decks, statistically increasing the probability that fine particles will encounter and pass through screen apertures within the available deck length. The result is classification efficiency (imperfection factor) 15-25% better than equivalently sized conventional inclined screens processing the same feed material. Anti-clogging polyurethane screen panels with tapered apertures prevent near-size particle blinding, a critical advantage when processing moist ores typical of Brazil’s Pará state tropical mining regions where seasonal rainfall can elevate ore moisture content to 8-15%.

• High Capacity Compact Design: The probability screening configuration achieves 50-300 TPH throughput within a compact footprint, requiring 30-40% less installation area than conventional horizontal screens. This space efficiency reduces structural steel requirements and building costs in greenfield processing plant construction.
• Anti-Clogging Tapered Aperture Panels: Each deck is fitted with replaceable polyurethane screen panels featuring tapered apertures that are wider at the discharge side than the feed entry side. This self-cleaning aperture geometry prevents near-size particle wedging and blinding, maintaining consistent open area and classification performance even with moist or clay-rich ores.
• Multi-Fraction Single-Pass Production: The 2-5 deck configuration generates multiple classified product streams simultaneously. A typical 4-deck iron ore classification application produces +25mm oversize (recrush), 12-25mm, 6-12mm lump product, 1-6mm fine product, and -1mm undersize reporting to the grinding circuit, all in one screening unit.
• Adjustable Stroke and Inclination: Vibration amplitude (4-8mm) is adjustable via eccentric counterweight positioning on the dual vibration motors. Deck inclination angles are field-adjustable through telescoping support struts with pinned position locks, enabling rapid reconfiguration for different ore types or particle size specifications.
• Tropical Environment Durability: The screen frame is constructed from hot-rolled structural steel with full penetration welded joints, stress-relieved and shot-blasted to SA 2.5 surface preparation before application of a three-layer marine-grade epoxy coating system. All fasteners are 316 stainless steel, and dust covers with integrated breather vents protect the vibrator motor bearings in tropical humidity conditions.
• Low Dynamic Load Transmission: The dual counter-rotating vibrator motor configuration generates a linear vibration pattern with self-canceling lateral force components, reducing dynamic loads transmitted to the supporting structure by up to 70% compared to single-motor circular-throw screen designs. This enables lighter support steel and reduced foundation requirements.

The GLS probability vibrating screen is engineered for high-tonnage classification in large-scale mineral processing facilities. Primary applications include iron ore classification in Brazilian processing plants where the screen separates crushed ore into lump (+6.3mm), sinter feed (1-6.3mm), and pellet feed (-1mm) fractions for Vale-type beneficiation circuits. For bauxite beneficiation operations in Pará state, the GLS screen performs washing and classification of ROM bauxite, removing clay and silica fines (-0.5mm) while classifying washed bauxite into export-grade size fractions. The anti-clogging screen panel design is particularly effective for these high-moisture applications where conventional woven wire screens would blind within hours of operation. Additional applications include aggregate and manufactured sand production, coal preparation plant sizing, gold heap leach agglomeration feed preparation, and phosphate rock desliming. The quick-change screen panel design enables aperture changes within 2-3 hours per deck, supporting flexible production scheduling for multi-product operations.

Each GLS probability screen is factory assembled and test-run for a minimum of 2 hours at full vibration amplitude with vibration analysis data captured at multiple measurement points to verify uniform amplitude distribution across the screen deck. Screen panel fitment is verified on every deck, and weld integrity is confirmed via magnetic particle inspection of all structural joints. The screen is partially disassembled for shipping with the main frame in a purpose-built steel shipping cradle, vibration motors individually boxed, and screen panels palletized by deck. A comprehensive documentation package includes vibration analysis reports, dimensional inspection certificates, installation drawings, and operation & maintenance manual in English and Portuguese. Our commissioning engineers supervise on-site assembly, perform vibration tuning and stroke measurement verification, and provide full operator and maintenance training. All equipment carries a 12-month warranty from commissioning date.