Import Coke Vibration Screen Procurement
Import Coke Vibration Screen Procurement: Technical Guide for Industrial Buyers
Your Screening Operation Is Losing Profit Every Hour
Coke screening operations face three persistent challenges that directly impact your bottom line. Primero, blinding and clogging of screen decks reduces effective separation area by 3045%, forcing frequent manual cleaning that costs $2,500$4,000 per shutdown hour. Segundo, screen deck breakage from impact loading of 5080mm coke particles leads to replacement cycles of 68 semanas, with each deck replacement costing $8,000$15,000 más 1216 horas de inactividad. Tercero, tamaño del producto inconsistente causes penalties of $38 per ton when oversize material exceeds customer specifications, or lost revenue when undersize material is discarded unnecessarily.
Your current screening equipment—whether conventional circular motion screens or outdated linear motion units—was likely designed for aggregate processing, not the specific challenges of metallurgical coke. Can your existing system maintain <5% oversize and <3% undersize at 200 toneladas por hora? Are you replacing screen panels every 45 días? Si estas preguntas generan preocupaciones, this procurement guide addresses the technical specifications required for import coke vibration screen solutions.
Descripción general del producto: Criba vibratoria de coque de servicio pesado
The import coke vibration screen is a linear motion, dualshaft vibrating screen engineered specifically for hightemperature (80120°C), abrasive coke classification. Unlike standard aggregate screens, this equipment incorporates wearresistant polyurethane or AR400 steel decks, highGforce exciters (4.56.0 GRAMO), and selfcleaning mechanisms to maintain throughput.
Flujo de trabajo operativo:
1. Feed Distribution: Coke at 80120°C enters via chute, distributed across full screen width by a stepped feed box to prevent material segregation
2. Estratificación Primaria: Linear motion at 850950 RPM separates material into layers, with fines migrating to bottom deck within 23 artículos de segunda clase
3. Clasificación de tamaño: Material passes through 23 deck levels (normalmente 50 mm, 25milímetros, 10mm apertures) con 8592% eficiencia de cribado
4. Oversize Discharge: +50mm material exits via top deck spout at 1525° angle for crusher feed
5. Undersize Collection: 10mm fines collected in bottom hopper, with optional dust collection connection
Ámbito de aplicación: Metallurgical coke (foundry, alto horno, coca de nuez), coque de petróleo, coque calcinado
Limitaciones: Not suitable for wet screening (>8% moisture causes binding), maximum feed temperature 150°C, requires minimum 15° incline for material flow
Características principales
HighG Exciter System | Base técnica: Dualshaft counterrotating mechanism generating linear motion at 4.56.0 GRAMO | Beneficio operativo: Material moves at 0.250.35 m/s across deck, preventing bed depth exceeding 3x aperture size | Impacto del retorno de la inversión: 1822% higher throughput vs. conventional screens at same deck area
SelfCleaning Ball Tray Assembly | Base técnica: Rubber balls (2540mm de diámetro) in perforated trays beneath each deck, activated by screen vibration | Beneficio operativo: Continuous clearing of 815mm coke fines from apertures, reducing blinding by 6075% | Impacto del retorno de la inversión: Elimina 23 manual cleaning shifts per week, ahorro $18,000$25,000 anualmente en trabajo de parto
Modular Polyurethane Deck System | Base técnica: Injectionmolded polyurethane panels (shore hardness 85A95A) with steel insert frames, bolted to cross members | Beneficio operativo: Panel replacement in 45 minutos vs.. 46 hours for welded wire cloth; 34x longer wear life | Impacto del retorno de la inversión: Annual deck replacement cost reduced 5565%, de $42,000 a $15,000$18,000
TemperatureResistant Bearing Housing | Base técnica: Doublerow spherical roller bearings with PTFE seals and external cooling fins, rated for 150°C continuous operation | Beneficio operativo: Bearing life exceeds 25,000 hours at 80°C operating temperature vs. 8,000 hours for standard units | Impacto del retorno de la inversión: Eliminates one bearing replacement per year, ahorro $3,500$5,000 in parts and 8 horas de inactividad
Variable Stroke Adjustment | Base técnica: Adjustable eccentric weights on exciter shafts, stroke range 814mm in 1mm increments | Beneficio operativo: Optimize stroke for different coke grades (foundry coke requires 1012mm, nut coke 810mm) | Impacto del retorno de la inversión: Screening efficiency improves 812% when stroke matched to material characteristics
Sistema de contención de polvo | Base técnica: Bolted enclosure with rubber gaskets at all access points, negative pressure connection port (200300 Pa) | Beneficio operativo: Reduces airborne coke dust by 9095%, cumplir con OSHA PEL de 0.5 mg/m³ | Impacto del retorno de la inversión: evita $15,000$25,000 in annual dust control fines and ventilation system upgrades
QuickRelease Tensioning Mechanism | Base técnica: Hydraulic or mechanical wedge system tensioning screen panels to 3.54.0 kN/m | Beneficio operativo: Tiempo de cambio de plataforma reducido de 8 horas para 2.5 hours for full deck replacement | Impacto del retorno de la inversión: Reduces annual downtime by 4050 horas, valorado en $12,000$20,000 en producción perdida
Ventajas competitivas
| Métrica de rendimiento | Estándar de la industria (Pantalla convencional) | Import Coke Vibration Screen | Ventaja (% Mejora) |
|||||
| Eficiencia de cribado (en 200 TPH) | 7278% | 8893% | 1822% más alto |
| Deck replacement frequency | Cada 68 semanas | Cada 2024 semanas | 6067% vida más larga |
| Tiempo medio entre fallos | 1,200 horas | 3,500 horas | 192% mejora |
| Consumo de energía por tonelada | 0.450.55 kWh/t | 0.320.40 kWh/t | 2228% reducción |
| Noise level at 1 metro | 9298 dB(A) | 8287 dB(A) | 1011 reducción de dB |
| Maintenance hours per month | 2432 horas | 812 horas | 6267% reducción |
| Product oversize (+50milímetros) | 812% | 35% | 5562% reducción |
| Product undersize (10milímetros) | 58% | 23% | 5562% reducción |
Especificaciones técnicas
Gama de modelos: CVS1836 (1.8m x 3.6m) to CVS3060 (3.0m x 6.0m)
Capacity Ratings:
- CVS1836: 80120 TPH (coque, 50mm top deck)
- CVS2448: 150200 TPH (coque, 50mm top deck)
- CVS3060: 250350 TPH (coque, 50mm top deck)
- Motor: 1545 kW per exciter (dual motor configuration)
- Voltaje: 380V/50Hz o 460V/60Hz (3fase)
- Método de inicio: Stardelta or soft starter (recomendado)
- Deck material: Poliuretano (shore 90A) or AR400 steel (optional for +80°C)
- Placas laterales: Acero ASTM A36, 812mm de espesor
- Cross members: ASTM A500 Grade B, 46mm wall
- Exciter shafts: 4140 acero aleado, tratado térmicamente para 2832 CDH
- Longitud: 5,200 milímetros (including feed and discharge chutes)
- Ancho: 2,800 milímetros (including motor platforms)
- Altura: 2,400 milímetros (incluyendo marco base)
- Peso: 8,5009,200 kilos (seco, without media)
- Temperatura ambiente: 10°C a 55°C
- Material temperature: 0°C to 150°C (continuo)
- Humedad: 095% sin condensación
- Dust exposure: Arriba a 50 mg/m³ (with dust containment)
- CVS1836 (80120 TPH): $85,000$110,000
- CVS2448 (150200 TPH): $135,000$175,000
- CVS3060 (250350 TPH): $195,000$250,000
- Heated deck system (vapor o electrico): $18,000$25,000
- Variable frequency drive package: $12,000$18,000
- Sistema de monitoreo remoto (vibración, temperatura, current): $8,500$12,000
- AR400 steel deck upgrade (vs. poliuretano): $22,000$35,000
- Dust collection hood and ducting: $15,000$22,000
- Garantía estándar: 12 meses partes, 90 days labor
- Garantía extendida (24 meses): 812% del costo del equipo
- Puesta en marcha y formación (3 días en el sitio): $4,500$6,500 plus travel
- Contrato de mantenimiento anual: $12,000$18,000 (includes two inspections, priority parts)
- Carta de crédito (L/C a la vista): Standard for import transactions
- 30% depósito, 70% contra documentos de embarque
- Arrendamiento de equipos: 3660 términos mensuales, 68% ABR (sujeto a aprobación de crédito)
- programa de intercambio: 1525% crédito por equipo usado calificado
Requisitos de energía:
Especificaciones de materiales:
Dimensiones físicas (CVS2448 reference):
Rango de operación ambiental:
Escenarios de aplicación
Blast Furnace Coke Screening | Desafío: A steel mill in Ohio was experiencing 12% demasiado grande (+75milímetros) in their blast furnace coke feed, causing burden permeability issues and 3% increase in coke rate (costing $1.2M annually). Their existing 20yearold screen had 68% efficiency and required weekly deck replacement. | Solución: Installed CVS2448 import coke vibration screen with 50mm and 25mm decks, 10mm stroke, 5.2 G acceleration. Integrated ball tray cleaning system and dust enclosure. | Resultados: Sobredimensionado reducido a 4.2%, undersize to 2.8%. Screening efficiency improved to 91%. Deck replacement interval extended to 22 semanas. Annual coke rate savings of $980,000, más $45,000 in reduced maintenance costs.
Foundry Coke Processing | Desafío: A foundry coke producer in Pennsylvania needed to produce 95% within 2575mm specification for cupola furnaces. Their existing screen produced 15% multas (25milímetros) requiring reprocessing, adding $8.50/ton cost. | Solución: Deployed CVS1836 with 75mm and 25mm decks, 12mm stroke, 5.5 GRAMO. Added variable frequency drive to adjust speed for different coke grades. | Resultados: Generación de multas reducida a 5.8%, ahorro $380,000 annually in reprocessing costs. Se mejoró la consistencia del producto, allowing $2.50/ton premium pricing. período de recuperación: 7 meses.
Petroleum Coke Classification | Desafío: A refinery in Texas was processing 180 TPH of calcined petroleum coke with 8% contenido de humedad, causing severe blinding on their existing screens. Tiempo de inactividad para limpieza promedio 6 horas por semana. | Solución: Installed CVS3060 with heated deck option (steam coils maintaining 60°C deck temperature) and specialized slotted apertures (12mm x 50 mm) to handle sticky material. | Resultados: Blinding reduced by 85%. Weekly cleaning downtime eliminated. El rendimiento aumentó a 220 TPH. Aumento de producción anual de 15,000 montones, valorado en 1,1 millones de dólares.
Consideraciones comerciales
Niveles de precios de equipos (Puerto de origen FOB, Dólar estadounidense):
Características opcionales (pricing added to base):
Paquetes de servicios:
Opciones de financiación:
Preguntas frecuentes
q: Can this screen handle coke at 120°C directly from the quench tower?
A: Sí, the standard configuration handles continuous material temperatures up to 150°C. The bearing housing cooling fins and hightemperature grease (NLGI Grade 2 with PTFE) maintain bearing temperatures below 85°C at 120°C feed. For sustained operation above 120°C, we recommend the heated deck option to prevent thermal shock to polyurethane panels.
q: What is the typical lead time for import coke vibration screen procurement?
A: El plazo de entrega estándar es 1418 semanas desde la confirmación del pedido, incluyendo la fabricación (810 semanas), quality inspection (1 semana), and ocean freight (46 semanas). Expedited manufacturing (68 semanas) is available at 1215% de primera calidad. Air freight can reduce total lead time to 810 weeks but adds $8,000$15,000 in shipping costs.
q: How does this screen compare to banana screen designs for coke classification?
A: Banana screens offer 1520% higher capacity per unit area due to variable deck angle, but our linear motion design provides 58% better screening efficiency at equivalent capacity. For coke applications where product quality is prioritized (blast furnace or foundry), the linear motion design is preferred. For highthroughput applications where some efficiency loss is acceptable, banana screens may be considered.
q: What spare parts should I stock for the first year of operation?
A: Recommended initial spares inventory: 2 sets of screen panels (one per deck), 4 exciter bearings (SKF 22320 o equivalente), 2 sets of rubber buffer springs (8 por juego), 1 set of ball tray assemblies (incluido 200 rubber balls), 1 spare motor (if not locally available). Estimated cost: $18,000$25,000. Esto cubre 95% of common failure modes.
q: Can this screen be retrofitted into an existing screening tower?
A: Sí, but requires structural assessment of support beams (must withstand 4.56.0 G dynamic load), chute modifications for feed distribution, and electrical upgrades for dual motor configuration. Typical retrofit cost: $25,000$45,000 incluyendo ingeniería, acero estructural, e instalación. We provide CAD drawings and structural load calculations for your engineering team.
q: What is the expected ROI timeline for replacing an existing screen?
A: Basado en datos de campo de 12 instalaciones, El período de recuperación promedio es 814 meses. Primary savings sources: reduced maintenance labor (3540% of savings), extended deck life (2530%), improved product quality (2025%), and energy reduction (510%). El ahorro anual total suele oscilar entre $180,000$350,000 depending on throughput and current equipment condition.
q: How do I verify the screen meets ASTM or ISO standards for coke sizing?
A: We provide factory test certificates per ASTM D4749 (coke sieve analysis) y ISO 1953 (hard coal sizing). Onsite acceptance testing follows ASTM D2234 procedures. We guarantee screening efficiency of 88% minimum at rated capacity, verified by 8hour production test with your coke sample. Thirdparty testing can be arranged at buyer's cost ($3,500$5,000).