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1. PAINPOINT DRIVEN OPENING

Is your current size reduction process creating a bottleneck in your mineral processing line? Are you facing escalating maintenance costs due to frequent hammer and screen replacements, leading to unplanned downtime that costs your operation upwards of $5,000 per hour in lost production? Do your existing mills struggle to handle feed materials with moisture content above 12%, causing clogging and inconsistent particle size distribution (PSD)?

Plant managers report that inefficient hammer mills can reduce overall plant throughput by 1520% and increase energy consumption per ton by 30%. Engineering contractors face the challenge of specifying equipment that meets strict PSD tolerances for downstream processes like leaching or flotation, without exceeding capital expenditure budgets.

How can you achieve a consistent, fine grind (down to <2mm) on hightonnage feeds (10100 TPH) while reducing wear part costs by 40%? The answer lies in a fabricatorgrade hammer mill engineered for continuous, heavyduty service.

2. PRODUCT OVERVIEW

The Hammer Mill Fabricator is a heavyduty, horizontal shaft impact crusher designed for secondary and tertiary size reduction of brittle, midhard materials (Mohs hardness 47). It operates on a highspeed rotor assembly that propels material against fixed breaker plates and a curved screen basket.

Operational Workflow:
1. Feed Intake: Material enters the crushing chamber via a gravityfed or metered inlet.
2. Impact Crushing: Rotating hammers (swing or fixed) strike the material, propelling it against the adjustable breaker plates.
3. Attrition Grinding: Material is further reduced by shear and impact between the hammers and the screen basket.
4. Sizing & Discharge: Particles smaller than the screen aperture (e.g., 3mm, 6mm, 10mm) pass through; oversize material is recirculated via the rotor.
5. Air Assist (Optional): An integrated air system evacuates fines and reduces heat buildup.

Application Scope: Ideal for crushing limestone, gypsum, coal, clinker, and phosphate rock.
Limitations: Not suitable for abrasive materials (e.g., quartz, granite) above Mohs 7, nor for sticky, clayrich feeds exceeding 15% moisture without a dedicated predrying system.

3. CORE FEATURES

Reversible Hammer Design | Technical Basis: Symmetrical wear pattern | Operational Benefit: Doubles hammer service life before replacement | ROI Impact: Reduces annual hammer replacement costs by 50%

Hydraulic Screen Cart | Technical Basis: Quickrelease hydraulic cylinders | Operational Benefit: Screen changes in under 30 minutes vs. 4 hours for manual systems | ROI Impact: Recovers 3.5 hours of production per change, saving $17,500 annually at $5k/hr downtime

Variable Rotor Speed (VFDReady) | Technical Basis: Adjustable tip speed (4080 m/s) | Operational Benefit: Finetune PSD without changing screens | ROI Impact: Eliminates need for secondary screening on 70% of applications, reducing capital spend

HeavyDuty AISI 4140 Rotor Shaft | Technical Basis: Heattreated alloy steel | Operational Benefit: Withstands high torque loads and prevents torsional fatigue | ROI Impact: Extends mean time between failures (MTBF) to >8,000 hours

Replaceable Liner Plates | Technical Basis: AR400 abrasionresistant steel | Operational Benefit: Protects the main housing from wear | ROI Impact: Reduces housing repair costs by 80% over the machine’s 15year lifespan

Integrated Tramp Metal Protection | Technical Basis: Shear pin or hydraulic relief system | Operational Benefit: Automatically ejects uncrushable objects (e.g., drill bits, bucket teeth) | ROI Impact: Prevents catastrophic rotor damage, saving $25,000+ per incident

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Standard Mill) | Hammer Mill Fabricator Solution | Advantage (% improvement) |
| : | : | : | : |
| Throughput (TPH) | 45 TPH | 60 TPH | +33% |
| Specific Energy (kWh/ton) | 8.5 kWh/t | 6.2 kWh/t | 27% |
| Screen Change Time | 4 hours | 30 minutes | 87% |
| Hammer Life (tons ground) | 12,000 tons | 24,000 tons | +100% |
| PSD Consistency (d50) | ±15% variation | ±5% variation | 67% |
| MTBF (Mean Time Between Failures) | 2,500 hours | 8,000 hours | +220% |

Field data from 12month trial at a Midwest limestone quarry.

5. TECHNICAL SPECIFICATIONS

| Specification | Model HM40 | Model HM60 | Model HM80 |
| : | : | : | : |
| Capacity (TPH) | 10 40 | 25 60 | 40 100 |
| Rotor Diameter | 36" (914 mm) | 48" (1219 mm) | 60" (1524 mm) |
| Rotor Width | 24" (610 mm) | 36" (914 mm) | 48" (1219 mm) |
| Motor Power (kW) | 150 200 | 250 350 | 400 600 |
| Speed (RPM) | 1200 1800 | 900 1200 | 700 900 |
| Feed Size (Max) | 4" (100 mm) | 6" (150 mm) | 8" (200 mm) |
| Product Size (d50) | 2 10 mm | 3 15 mm | 5 20 mm |
| Weight (lbs) | 18,000 | 32,000 | 55,000 |
| Operating Temp Range | 20°F to 120°F | 20°F to 120°F | 20°F to 120°F |

6. APPLICATION SCENARIOS

Cement Clinker Grinding | Challenge: A cement plant needed to reduce 50mm clinker to 90% passing 5mm for the ball mill feed, but their existing impactor had 60% hammer wear after 500 hours. | Solution: Installed an HM60 Fabricator with reversible hammers and AR400 liners. | Results: Hammer life increased to 2,000 hours. Throughput rose from 35 TPH to 55 TPH. Energy consumption dropped by 25%.

Coal Preparation for Power Generation | Challenge: A utility required a consistent 6mm product from ROM coal (8% moisture) to feed pulverizers, but standard mills clogged in wet conditions. | Solution: Deployed an HM40 with a VFDdriven rotor and airassist system. | Results: Clogging eliminated. PSD consistency improved to ±3%. Plant availability increased from 88% to 97%.

Gypsum Recycling (Drywall) | Challenge: A recycler needed to separate paper from gypsum core at 20 TPH, but standard hammer mills created excessive fines and paper contamination. | Solution: Configured an HM80 with a slowspeed rotor (700 RPM) and a large screen aperture (12mm). | Results: 95% paper liberation achieved. Gypsum recovery rate hit 98%. Fines generation reduced by 40%.

7. COMMERCIAL CONSIDERATIONS

Equipment Pricing Tiers (FOB Factory):

• HM40 (Entry Level): $85,000 $110,000
• HM60 (MidRange): $145,000 $185,000
• HM80 (High Capacity): $220,000 $290,000



Optional Features:

• VFD Package: +$15,000 (includes control panel and programming)
• Air Assist System: +$22,000 (includes cyclone and ductwork)
• Stainless Steel Contact Surfaces: +$18,000 (for corrosive materials)
• Remote Monitoring Kit: +$4,500 (vibration and temperature sensors)

Service Packages:

• Standard Warranty: 12 months on parts, 24 months on rotor shaft.
• Extended Warranty (3Year): 8% of purchase price, includes annual inspection.
• Performance Guarantee: Guaranteed throughput and PSD within 5% of spec, or we retrofit at no cost.

Financing Options:

• LeasetoOwn: 3660 month terms, starting at $2,100/month for HM40.
• Deferred Payment: 90day payment holiday for firsttime buyers.
• TradeIn Program: 15% credit on your existing hammer mill (any brand).

8. FAQ

Q: Can this hammer mill handle wet or sticky materials like bauxite or clay?
A: For materials above 12% moisture, we recommend the optional airassist system and a coarser screen (10mm+). For sticky clays (>20% moisture), a cage mill or roll crusher is more appropriate.

Q: What is the typical lead time for a custom fabricatorgrade mill?
A: Standard models (HM40, HM60) ship in 810 weeks. Custom configurations (e.g., special rotor width or alloy) require 1416 weeks.

Q: How does the reversible hammer design affect maintenance costs?
A: Field data shows a 50% reduction in annual hammer spend. Instead of replacing worn hammers, you simply reverse the rotor direction to expose the unused face, doubling service life.

Q: Is the mill compatible with my existing 480V, 3phase electrical system?
A: Yes, all models are available in 460V, 575V, and 690V configurations. A VFDready option allows for softstart and speed control.

Q: What is the warranty on the rotor shaft?
A: The AISI 4140 shaft carries a 24month warranty against fatigue failure. Industry testing demonstrates an average service life of 15+ years under normal operating conditions.

Q: Can you guarantee a specific particle size distribution (PSD)?
A: Yes, with our Performance Guarantee package, we guarantee a d50 within ±5% of your target. This is validated via onsite sieve analysis during commissioning.

Q: What financing options are available for international buyers?
A: We offer letters of credit (L/C) and open account terms for qualified buyers with a 30% deposit. Leasetoown is available for North American customers only.