Holmes Coal Pulverizer with Manual Feed

Gravity Feed Pulverizers: Holmes Coal Pulverizer with Manual Feed

Holmes Coal Pulverizer with Manual and Gravity Feed

Holmes Coal Pulverizers are bench-top size reduction equipment that do a great job reducing coal or coke from No. 4 to No. 60 sieve size. They come in different types with manual or auger feed mechanisms and configurations. All units are painted steel and cast iron and have one-piece balanced rotor with hard coated hammers, 1hp, single phase motor with overload protection. Chambers are fully sealed with quick-opening latch with safety interlock for cleaning or changing screen plates. Grinding chamber may have a liner to enhance wear resistance and grinding efficiency. The Holmes Coal Pulverizer can process many materials and high throughput, perfect for lab and industrial use. It’s a mill that mills materials efficiently.

Feed hoppers and sample cups are galvanized. Standard feed hoppers are 0.5L and have vinyl snap-on cover. Inquire for 1L hoppers. Pulverizer capacity varies by model and screen plate. Each model has a lightweight steel base plate on 4 rubber pads. Sensor stops power when chamber door is open and resumes when it’s closed and latched. Material is fed from hopper into pulverizing chamber to be processed, first crushed then ground to desired fineness. Pulverizer is designed to pulverize material to lab or industrial size, produces fine particles for analysis or further processing. Processed material can be collected in drum as part of discharge system.

Five screen plates are included with each machine – choose from six perforation diameters: 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). Lock pins hold screen plates in pulverizing chamber. Each model comes with approximately 10ft of power cord (but no plug) to plug into a power source. Pulverizer can produce a range of particle sizes from coarse to fine depending on screen plate.

Holmes Coal Pulverizer, Manual Feed

Manual feed from hopper to pulverizing chamber. Approximate processing rate 0.9lb/min (400g/min) with 0.024in screen plate.

• Manual or auger feed models to choose from (different types of feed mechanisms)

• Rugged steel and cast iron construction

• Overload protection

• Sensor halts power when chamber door is open

• Fully sealed pulverizing chamber

• Advantages: high efficiency, easy to clean, suitable for many materials

• Design allows for easy access to clean internal components for optimal operation

Max. Particle Size No.4 (4.75mm)

Final Size No.60 (250µm)

Max. Feed Capacity 0.9lb/min (400g/min)

Grinding Elements Choose from (6) included plates: 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)

Application Coke

Hopper Capacity 0.323gal (1.2L)

Electrical 115V / 60Hz / 12Amps

Product Dimensions 18 x 22 x 21.5in (508 x 711 x 610mm) WxDxH

Meets Test Method: ASTM D 2013 / D 2013M and is compatible with tools such as the Mini Slump Cone. For more information on concrete slump testing methods, see Understanding ASTM C143: The Essential Guide to Concrete Slump Testing.

Holmes Pulverizer is perfect for lab and industrial sample prep. While pulverizers are used for fine grinding, crushers are machines used for coarser size reduction, like producing gravel from larger materials.

What is a Pulverizer

Pulverizers are mechanical devices that grind solid materials into fine powder and are used in construction, pharmaceuticals and food processing industries. By using specialized grinding tools like hammer mills, pulverizers crush coal, limestone and other construction materials to desired product fineness. Size reduction is crucial for preparing materials for further processing or analysis and the output capacity of a pulverizer depends on feed size, material characteristics and the level of fine grinding required. With ability to handle multiple types of materials and deliver consistent results, pulverizers play a vital role in efficient production and processing across multiple industries.

History of Pulverizers

Pulverizing has ancient origins starting from hand grinding and crushing. As technology advanced, so did the efficiency and specialization of pulverizers. Introduction of pulverizers in 19th century was a big leap forward, enabling industries to process materials more efficiently for energy production and construction. Modern pulverizers are designed with stainless steel construction for durability and easy maintenance, for long life and minimal downtime. These advancements have made pulverizers a cornerstone in many industries where efficient pulverizing and reliable operation is required for high volume production and processing of materials like iron and other energy resources.

Pulverizer Design

Pulverizers are built to withstand the demanding conditions of high speed grinding and crushing, with robust construction and specialized components for specific applications. At the heart of each unit is the grinding chamber where materials are subjected to centrifugal force and high speed grinding equipment to produce fine powder. Depending on the processing requirements, pulverizers can be equipped with different feed systems like gravity feed or belt feed to optimize material flow. Design of each pulverizer takes into account particle size, material properties and the application to deliver reliable and efficient performance for multiple processing needs.

Types of Pulverizers

There are many types of pulverizers, each for specific materials and industries. Hammer mills are used for crushing coal, limestone and other materials for size reduction and fine grinding. Grinding mills are for processing spices, pharmaceuticals and other materials that require finer particle size. Crushers and pulverizers are another type of pulverizer for coarse crushing in various industries. Pulverizers are found in food processing, agricultural uses and energy production where they help achieve desired product consistency. Selection of a specific pulverizer model depends on the material to be processed, the required fineness and the unique processing requirements of each application.

Feed Systems and Operation

Pulverizers can be equipped with different feed systems like gravity feed, belt feed and screw feed to ensure a steady and controlled supply of material into the grinding chamber. These systems are designed to match the specific needs of the application taking into account factors like feed size, material properties and the product fineness. Inside the grinding chamber high speed grinding work to reduce the material to fine powder. For optimal performance regular maintenance and cleaning is essential. Many modern pulverizers have easy maintenance options like quick access panels and removable screens for fast cleaning and screen changes to maintain consistent output and prolong equipment life.