Holmes Coal Pulverizer with Auger Feed

Holmes Coal Pulverizer with Auger Feed

The Holmes Coal Pulverizer with Auger Feed is a robust, bench-type unit engineered for the efficient reduction of coal and coke samples. It excels at pulverizing materials from an initial No. 4 sieve size down to a fine No. 60 sieve size, making it an essential tool for laboratory sample preparation prior to analysis. This model streamlines the process with an integrated, chain-driven 1/8hp auger feed, ensuring a consistent and controlled material flow into the grinding chamber for uniform results.

Robust Construction and Reliable Performance Constructed from durable painted steel and cast iron, the pulverizer is built for longevity in demanding lab environments. At its core is a one-piece, dynamically balanced rotor fitted with hard-coated hammers, driven by a powerful 1hp single-phase motor. This motor includes built-in overload protection to prevent damage and ensure consistent operation. The unit's approximate processing rate is 1lb (450g) per minute when using the 0.024in screen plate, allowing for rapid sample throughput.

Advanced Safety and User-Friendly Design Safety is a paramount design feature. A safety interlock sensor automatically cuts power to the motor whenever the grinding chamber door is opened and only resumes operation once the door is securely closed and latched. The pulverizing chamber is fully sealed to prevent sample loss and contain dust during operation. For easy access for cleaning or switching screen plates, the chamber features a convenient quick-opening latch. The unit rests on a sturdy steel base plate with four rubber pads to minimize vibration and enhance stability.

Included Components and Customization Each pulverizer comes equipped with a comprehensive set of accessories. Five screen plates are included, which you can select from six available perforation diameters to achieve your desired final particle size: 0.020in (0.508mm), 0.024in (0.610mm), 0.033in (0.838mm), 0.040in (1.02mm), 0.0625in (1.59mm), and 0.093in (2.36mm). Screen plates are easily secured in the chamber with lock pins. The unit includes a standard 0.5L galvanized feed hopper with a vinyl snap-on cover (larger 1L hoppers are available upon inquiry), a 325-cubic inch sample container, and an approximately 10ft power cord for direct connection to a power source (plug not included).

This pulverizer meets the stringent requirements of ASTM D2013/D2013M test methods, ensuring your sample preparation is compliant with industry standards.

Key Features:

• Automated Auger Feed: A 1/8hp chain-driven auger provides consistent material feeding for uniform pulverizing.
• Durable Construction: Built with rugged steel and cast iron components for long service life.
• Powerful Grinding: A 1hp motor with hard-coated hammers efficiently reduces tough materials.
• Enhanced Safety: A safety interlock sensor halts power when the chamber door is open, and the motor has overload protection.
• Sealed Chamber: The fully sealed pulverizing chamber minimizes dust and prevents sample cross-contamination.
• Versatile Sizing: Includes a selection of five screen plates to achieve various final particle sizes.

Specifications:

• Application: Coal or coke
• Maximum Particle Size: No. 4 (4.75mm)
• Final Particle Size: Down to No. 60 (250µm)
• Max. Feed Capacity: Approx. 1lb/min (450g/min) with 0.024in screen
• Grinding Elements: Includes a choice of five plates from six available perforation sizes: 0.020, 0.024, 0.033, 0.040, 0.0625, and 0.093in (0.508, 0.610, 0.838, 1.02, 1.59, and 2.36mm)
• Hopper Capacity: 0.5L (18.5gal) standard; 1L available by inquiry
• Electrical: 230V / 60Hz / 6.6 Amps
• Product Dimensions (WxDxH): 20 x 28 x 24in (508 x 711 x 610mm)
• Compliance: Meets ASTM D2013 / D2013M test methods