1. PAINPOINT DRIVEN OPENING

Is your coke screening operation plagued by persistent, costly inefficiencies? For plant managers and engineering contractors in the metallurgical coke and foundry coke sectors, the vibration screen is a critical yet problematic node. Common challenges include:

Blinding & Carryover: Moisture and fine coke dust adhere to screen decks, blinding apertures and forcing undersized material to carry over. This reduces screening efficiency by 1530%, contaminates product grades, and directly impacts blast furnace burden consistency.
Excessive Downtime for Maintenance: Traditional screens require frequent shutdowns for deck cleaning, tensioning, or panel replacement. Unplanned downtime for a primary coke screen can cost over $5,000 per hour in lost production.
Structural Fatigue & Premature Failure: The abrasive nature of coke and the highcycle operation induce metal fatigue in side plates, cross members, and welds. This leads to catastrophic frame cracks, often within 1218 months of service, necessitating a full rebuild or replacement.
High Energy Consumption & Noise: Inefficient drive systems and unbalanced mass designs consume excess power—a significant operational cost—while generating noise levels that exceed 90 dB(A), creating environmental and worker safety concerns.

Are you seeking a vibration screen solution that delivers consistent product sizing with minimal downtime, engineered specifically for the harsh demands of coke classification?

2. PRODUCT OVERVIEW

The China Coke Vibration Screen is a heavyduty, linear motion vibrating screen designed for the highcapacity sizing and scalping of metallurgical (blast furnace) coke and foundry coke. Engineered for robustness in highabrasion, highdutycycle environments, it ensures reliable separation of coke breeze from lump coke.

Operational Workflow:
1. Feed & Distribution: Sized coke from the crusher or oven is fed onto the screen via a regulated feed chute onto a robust feed deck for even material distribution.
2. Stratification & Separation: The dualshaft vibrator assembly generates a linear throwing motion, stratifying material. Oversize (lump coke) travels across the deck surface to the discharge end, while undersize (coke breeze) passes through the defined screen apertures.
3. Product Handling: Separated fractions are discharged via dedicated chutes—lump coke to blast furnace stockhouses or loading bays, and coke breeze to sintering plants or storage.

Application Scope: Primary sizing (e.g., separating >25mm from <25mm), scalpings of oven charge, dedusting of crushed coke. Not recommended for extremely sticky materials without specialized deck systems or for wet screening applications without design modifications.

3. CORE FEATURES

Modular Deck System | Technical Basis: Boltin, pretensioned polyurethane or rubberclad steel panels | Operational Benefit: Panels can be replaced individually in under 30 minutes without specialized tools; reduced blinding characteristics | ROI Impact: Cuts deck maintenance downtime by up to 70% versus bolteddown steel plate systems.

DualShaft Synchronized Vibrator | Technical Basis: Two contrarotating eccentric masses connected by a synchronization gear | Operational Benefit: Generates a pure linear motion for efficient material conveyance; allows for adjustable stroke through counterweight configuration | ROI Impact: Provides consistent screening efficiency of 9295%, improving product yield and reducing recirculation load.

Robust Frame Construction | Technical Basis: Finite Element Analysis (FEA)optimized side plates with reinforced cross beams and continuous welds | Operational Benefit: Withstands dynamic loads from both material impact and vibration forces; resists fatigue cracking | ROI Impact: Extends operational lifespan beyond 60 months under severe duty, deferring major capital expenditure.

DustProtected Bearing Assembly | Technical Basis: Labyrinth seals combined with grease purge system on vibrator bearing housings | Operational Benefit: Effectively excludes abrasive coke dust from critical bearing components | ROI Impact: Increases bearing service life to over 20,000 hours, eliminating a primary cause of unplanned stoppages.

EnergyEfficient Drive System | Technical Basis: Direct coupled IE3class motors with flexible couplings | Operational Benefit: Reduces power transmission losses; operates at >94% motor efficiency | ROI Impact: Lowers annual energy consumption by approximately 812% compared to standardefficiency drives with Vbelts.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard | China Coke Vibration Screen Solution | Advantage (% improvement) |
| : | : | : | : |
| Screening Efficiency (dry coke) | 8588% | 9295%| +7% average increase |
| Deck Panel Change Time (full deck) | 812 hours| 34 hours| ~65% reduction |
| Vibrator Bearing Life (L10) | ~12,000 hours| >20,000 hours| >66% extension |
| Energy Consumption (per ton screened) Baseline = 100%|100%|8892%|812% reduction |
| Structural Fatigue Life (to first major crack)|1824 months|60+ months|>150% improvement |

5. TECHNICAL SPECIFICATIONS

Capacity / Rating: Models available from 50 TPH to 1,200 TPH capacity for dry coke screening.
Power Requirements: Drive motor from 5.5 kW to 45 kW (400V/50Hz/3Ph standard). IE3 highefficiency rating.
Material Specifications: Side plates & frame: Q345B carbon steel; Screen decks: Hardox 400 wear liners on feed zone; Deck panels: Tensionable polyurethane (PU) or rubberclad steel; Vibrator shafts: 42CrMo alloy steel.
Physical Dimensions: Typical unit sizes range from 1.2m x 3m singledeck up to 2.4m x 6m doubledeck configurations.
Environmental Operating Range: Ambient temperature: 20°C to +45°C; Designed for dustladen atmospheres; Weather covers available.

6. APPLICATION SCENARIOS

[Metallurgical Coke Plant Primary Sizing] Challenge: A major steel plant’s existing screens suffered rapid deck blinding due to residual moisture (~4%), causing inconsistent lump/breeze split and excessive recrushing of onspec material. Downtime for manual cleaning occurred weekly.

[Foundry Coke Producer Product Dedusting] Challenge: A producer needed to remove fines (<10mm) from crushed foundry coke to meet strict customer specifications but experienced high noise levels and frequent spring failures on old screens.

[Coke Wharf Screening Station] Challenge: A port facility required robust equipment for final screening before ship loading but faced constant structural weld failures on screens due to saltair corrosion combined with abrasive wear.

[Metallurgical Coke Plant Primary Sizing] Solution: Implementation of two large linear China Coke Vibration Screens equipped with nonblinding PU panel systems on the primary sizing duty.

[Foundry Coke Producer Product Dedusting] Solution: Installation of a midsized China Coke Vibration Screen with an enclosed base pan and rubber shear spring mounts.

[Coke Wharf Screening Station] Solution: Deployment of heavyduty screens featuring hotdip galvanized frames postwelding alongside AR steel liners at all impact points.

[Metallurgical Coke Plant Primary Sizing] Results: Screening efficiency stabilized at ≥94%. Deckrelated downtime reduced by over $150k annually in labor and lost production savings.

[Foundry Coke Producer Product Dedusting] Results: Fines content consistently below spec threshold (<2%). Noise at operator stations reduced by ~10 dB(A). Spring replacement intervals extended from quarterly to biennial.

[Coke Wharf Screening Station] Results: No structural integrity issues reported after three years of continuous operation

7 COMMERCIAL CONSIDERATIONS

Equipment pricing is tiered based on size capacity construction features:
• Standard Duty Series For capacities upto300TPH ideal secondary/check screening
• HeavyDuty Series For primary sizing duties(300–800TPH)
• Extra HeavyDuty Series For largescale plants(800+TPH)

Optional Features Include:
• Enclosed dust hoods
• Heating systemsfor decks
• Vibration monitoring sensors
• Different panel materials(wire mesh rubber PU)
• Special corrosion protection coatings

Service Packages Available:
• Basic Package Includes commissioning spare parts kit
• Planned Maintenance Package Covers annual inspection parts discounts
• Full Service Contract Includes predictive maintenance basedon sensor data

Financing Options:
Direct leasing arrangements through partner financial institutions are available as well as milestonebased payment plansfor large projects

8 FAQ

Q1 Are your screens compatible with our existing feed conveyor discharge chutework?
Field data shows our engineering team can provide detailed interface drawings ensuring mechanical compatibility We typically require your existing layout dimensions load data

Q2 What isthe expected impacton our overall plant throughput?
By maintaining consistent screening efficiency this solution minimizes bottlenecksin your crushing circuit Industry testing demonstrates plants reporta3–5% increasein usable product output dueto reduced recirculation load

Q3 Do you offer different motion types like circularor elliptical?
For efficient conveyanceof abrasive granular materialslikecoke linear motionis themost effective standard Our design focuseson optimizingthis motionfor maximum longevityand performance

Q4 What arethe standard commercial terms lead time payment structure?
Standard deliveryis14–16weeksfrom orderconfirmation Payment termsare typically30%advance70%against shipment copyof billoflading Other termscanbe negotiatedfor turnkey projects

Q5 Howis implementation handled? Do you providesupervision?
We providecomprehensive foundation drawings electrical schematics Our standard offering includes remote commissioning support Optional onsite supervisionby our engineersis availableas partofa service package