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Jun 2, 2015 12:11:16 PM
Jan 7, 2015 12:31:42 PM
We are pleased to announce the recent acquisition of Schutte-Buffalo Hammermill, LLC. Please join us in welcoming our new CEO, Martin Berardi. The follwing press release cites the details of this exciting new chapter for our company.
January 5, 2015 Buffalo, NY - Effective December 29, 2014, Ownership of industrial manufacturing company, Schutte-Buffalo Hammermill, LLC has been acquired by Martin Berardi.
Incoming Chief Executive Officer, Martin Berardi is a recent retiree of Moog, Inc. where in the course of 34 years he served in a variety of roles ranging from sales, operations and general management to senior corporate leadership. Berardi's long-term experience in a successful manufacturing company, both domestic and international, positions Schutte-Buffalo Hammermill for continued growth potential and additional avenues to explore. Mr. Berardi has also been an active member of the Buffalo and Western New York community in various leadership positions including education, business groups and non-profit organizations.
Ownership of Schutte-Buffalo Hammermill has transferred from Thomas Warne and James Guarino who purchased the compnay in 2004 following a merger with Buffalo Hammermill Corporation. During their tenure Warne and Guarino brought about significant growth by maintianing a leadership role in key industries such as wood waste reduction, and feed and grain processing, while broadening their reach to emerging markets such as biomass processing and alternative fuels, as well as e-scrap, asphalt, and carpet recycling.
"Both Jim and I are excited to be a part of this new phase of Schutte-buffalo Hammermill. We look forward to being on Marty's team as we continue to provide the highest quality equipment for our customers," says Tom Warne, President.
"I have great confidence in the present Schutte-Buffalo Hammermill leadership, and I am pleased that Tom and Jim will be staying on in their current roles of President and General Manager, respectively," says Martin Berardi, CEO. "Our focused efforts will be to expand the business aggressively, and to provide opportunity for further employment growth in Western New York."
Oct 1, 2014 3:10:51 PM
Aug 8, 2013 11:22:00 AM
In the majority of hammer mill applications, the key factor determining finished particle size is the the screen. Any material that enters the grinding chamber must be reduced to a size small enough to pass through the screen that covers the mill's discharge opening. Because of this the screen size provides 70% of the control over the finished particle size.
Size reduction takes place when material is fed into a hammer mill's grinding chamber and it is repeatedly struck by flailing ganged hammers that are attached to a rotor spinning at very high speed. A combination of hammer blows, collision with the walls of the grinding chamber, and particle on particle impact reduce the material until it is able to pass through the screen.
Sizing up Screens
Screens and bar grates are constructed from steel and are available with perforations (screens) or spaces (bar grates) in a broad range of sizes. Screen size is determined by the size of the openings in the screen, and is described in the following units of measure: inches, millimeters, microns (one millionth of a meter), and US mesh (the number of wires running east/west and north/south in one square inch of screen).
The appropriate screen size is determined by the desired finished particle size, and the properties of the material being processed. That is, characteristics such as friability and moisture content have an effect of the manner in which a material will break down. As a result, using the same screen to process materials of different properties will result in a range of different finished particle sizes.
This variation is called particle size distribution, and it is based on the the individual properties of the materials being processed.
In this example: Glass is very friable, and will shatter very easily upon impact. In comparison, green wood chips are a fibrous material with a moisture content of up to 50%, which both effect the ease with which they are reduced. Finally, computer hard drives are very hard and comprised mostly of metals, making them comparatively hard to process and unlikely to breakdown beyond the screen or bar grate size.
The Force Factor
But screen size only accounts for 70% of what determines the finished particle size. The reamining 30% is attributed to the force of the impact on the material being processing. In the case of hammer mills, force is determined by rotor speed, and the size and number of hammers.
Let's take a closer look, this time using the example of a drinking glass:
Rotor Speed: Slowly tap the glass with a hammer and it will break into perhaps 3 to 4 large pieces. Conversely, if you hit it with the same hammer at a rapid speed, it will break into many more, much smaller pieces.
Hammer Size: Strike a water glass with a butter knife, and it will break into a few large pieces. Strike the same glass with a sledge hammer, and it will shatter into 1000+ pieces.
Finished particle size is determined by a combination of screen size, rotor speed, and the size and number of hammers. Material must remain in the grinding chamber until it is able to pass through the screen covering the hammer mill's discharge opening. Optimal screen size is determined by the desired finished particle size, and the properties of the material being processed.
Topics: particle size, green wood chips, hammer configuration, rotor speed, bar grates, material size reduction, moisture content, particle on particle contact, hard drives, particle size distribution, screens, hammer size
Jul 31, 2013 10:07:00 AM
Forward Thinking Brewers
The Tin Man Brewing Company of Evansville, Indiana is an early adopter in the craft brewery world. They are one of the first craft breweries to utilize a mash filter in their brewing process. It’s a relatively simple, yet highly effective concept. Tin Man’s Head Brewer Sean O’Rear describes the mash filter as a plate and frame filter that is loaded with brewer’s mash, a mixture of water and grains. The filter is then compressed to extract the liquid “wort”. The collected wort is then boiled with hops to produce beer. Bonus: the remaining solid portion, called spent grain, is given to a local farmer for use as cow feed!
The key benefit of mash filtering is that it allows for capturing up to 98% of the available sugar in the brewing grains, compared to 75% captured by more traditional methods.
Size Reduction Challenge
In order to achieve the goal of capturing 98% of the sugar, the grains had to be processed to a very small particle size prior to filtering. Initially, Tin Man was utilizing a two-roller stripper mill to reduce the grains. Unfortunately, the results were inconsistent at best, producing flour, uncracked kernels, and everything in between. This caused backups in filtering to occur, leading to significant loss of sugar portions from the grains, and prevention of the complete enzymatic activity that converts the grain starches to sugars. Ultimately, due to the inconsistency of the roller mill finished particle size, only 87% of the possible 98% grain efficiency was achieved. As a result, Tin Man was required to add approximately 10% more grain to their beer recipes to achieve the desired quality.
Roller Mill Out, Hammer Mill In
Unlike roller mills that reduce materials by compression, a hammer mill reduces by impact. A hammer mill is essentially an enclosed steel container, housing a rotor which spins at very high speed. Flat steel hammers are attached to the rotor. As the rotor spins, the hammers flail out, and repeatedly impact material in the grinding chamber until it is able to pass through the steel mesh screen covering the mill’s discharge opening. Finished particle size is determined by a combination of rotor speed, hammer size, hammer configuration, and screen size.
In effort to solve their issue with finished particle size consistency, Tin Man purchased a Schutte- Buffalo Hammer Mill Model 18-7-301B Circ-u-Flow hammer mill. Custom configured to suit their specific materials, and production goals, the mill features a 10 hp motor, abrasion resistant steel hammers, and a 1/8” screen.
The model 18-7-301B is a full circle screen hammer mill with 300 degree screen coverage of the rotor, compared to the 150 degree screen coverage seen in more traditional industrial hammer mill models. This means the properly sized material has a larger area to evacuate the grinding chamber. As a result, the full circle screen hammer mill has the highest throughput to horsepower ratio of all hammer mill styles.
O’Rear reports that following the hammer mill installation, the process improvements were instantly remarkable. The grains were processed to a very fine, consistent finished particle size with no additional milling time required, and thus no impact on labor. The resulting mash was much less viscous, and the loading of the mash filter was fast and easy, with no backups.
The first beer produced from the hammer milled grain using the old grain weights came out with significantly higher sugar loads than the beers produced with the same weight of roller milled grain. According to O’Rear, the efficiency went from 87% to 94% immediately! As a result, they are able to reduce production costs by dropping grain amounts by 8.5%.
“We will continue to optimize the system to achieve 98% mash efficiency, but no other improvement will have as large or as immediate an impact as our Schutte-Buffalo hammer mill.”Sean O’Rear, Head BrewerTin Man Brewing Company
Mar 29, 2013 9:37:00 AM
Blendability, and digestibility – even the economics of feed production – are all affected by the finished particle size of the grains. But this is not a one-size-fits-all situation.¹ The ideal finished particle size varies by the grain being processed, and depending on the species, the life stage of the animal.² With all of this in mind, selecting the proper method of size reduction is a critical decision.
Roller Mill or Hammer Mill
Unlike the angular shaped particles produced in a roller mill, the pulverizing action of the hammer mill results in particles that are more rounded. These smoother surfaces make it easier for the grains to be blended with other components of the feed.²
So Many Hammer Mills
A hammer mill is essentially a steel box surrounding a rotor. Swinging hammers attached to the rotor, flail out when the rotor spins. A screen covers the discharge opening to regulate the finished particle size.
As material enters the hammer mill, it is pulverized by a combination of hammer blows, particle on particle contact, and impact with the walls of the hammer mill. The material remains in the grinding chamber until it is able to pass through the screen covering the discharge area.
But those are just the basics. There are myriad styles of hammer mills: industrial mills, full circle screen hammer mills, horizontal grinders, tub grinders, and more. As for size, hammer mills can range in size from 6” to more than 60” rotor widths. Choosing the right hammer mill for your purposes depends greatly upon the material you are processing, and your production goals.
The Full Circle Solution
The design of the full circle screen hammer mill makes it the ideal method of size reduction when processing cereal grains for animal feed. Let’s take a closer look:
With swine operations reporting that up to 75% of their budget is allocated for feed production,³ the need for energy efficiency cannot be overstated.
As its name suggests, the full circle screen hammer mill differs from the traditional industrial hammer mill because it has nearly double the screen coverage of the rotor:
Full Circle Screen Hammer Mill Industrial Hammer Mill
The greater screen coverage of the full circle mill means that there is more area for the material to evacuate the grinding chamber. As a result, a higher throughput rate can be achieved at a lower horsepower in comparison to industrial hammer mill models.
Particle Size Flexibility
Precision and consistency of the finished particle size has a strong effect on the digestibility of the feed. A finished particle size that is either too large or too small will have adverse effects on animal performance.²
The primary factor determining finished particle size is the measurement of the perforations in the screen covering the discharge area. The size of these perforations is equal to the maximum finished particle size of the material processed.
The ideal particle size range of 650 to 750 microns³ can easily and consistently be achieved through proper screen selection. In addition, screens can easily be changed to accommodate the processing goals of a variety of grains using the same hammer mill.
The secondary factor in determining finished particle size if the speed of the hammer mill. When the rotor spins, the hammers flail out and impact the material with great severity causing it to break down. As a result, the higher the rotor speed, the greater the number of hammer mill blows, and thus a finer end product. An optional component for the full circle screen hammer mill is a variable frequency drive electrical control. This control panel allows the operator to raise or lower the rotor speed as needed for different applications.
The pulverizing action of the hammer mill produces a finished particle that is easily blendable. The nearly 360 degree screen coverage of the full circle screen hammer mill allows for the greatest throughput to horsepower ratio of all hammer mill designs. A consistent and precise finished particle size can be achieved by screen selection. Finally, the ability to change screen size, and the option of a variable speed frequency drive control, enable processing a variety of grains using the same hammer mill.
Nov 5, 2012 8:37:00 AM
Hammer mills of all shapes and sizes process material with the same basic pulverizing action. Rectangular steel hammers are attached to a shaft inside of a steel grinding chamber. As the shaft spins, the hammers flail out bringing them into contact with the material being processed. A combination of hammer blows, particle on particle impact, and contact with the mill’s interior work in unison to reduce the material until it is able to pass through the screen covering the mill’s discharge opening.
Once the material is reduced to the desired finished particle size and passed throught the screen, there are two options for how it exits the mill. The method is determined by the material's characteristics. If the material is:
It's all about the fan. Air swept mills are used primarily when grinding light, relatively non-abrasive materials to a mid range to fine particle size because lighter particles require suction to overcome the rotor airflow. The fan pulls the material from the mill in-feed through the grinding chamber. In addition, it pulls the finished product through the suction pipe, into the fan itself, and then blows the material out of the discharge pipe either to storage or next stage grinding.
There are three key benefits:
Topics: particle size, particle on particle contact, hammer mill design styles, gravity discharge industrial hammer mill, pneumatic discharge hammer mills, air assist, low density materials, abrasive materials
Jul 20, 2012 12:59:00 PM
Size reduction equipment comes in a wide variety of shapes and sizes: vertical or horizontal hammer mills, jaw crushers, roller mills and ram-fed grinders, just to name a few. For the most part, the size and shape of the mill/grinder/crusher plays a key role in the functionality of the machine, and for the applications it is best suited for. Nowhere is this truer than with the Full Circle Screen Hammer Mill.
A Peek Inside...
The full circle screen hammer mill gets its name from the 300 degree screen coverage of the rotor, while all other styles of hammer mills typically have closer to 180 degree coverage of the rotor.
Full circle screen hammer mills
To achieve the circular, nearly full coverage of the rotor requires that the screen be somewhat pliable, and therefore relatively thin. In addition, the full circle screen mills use thin, notched hammers that reduce material with a tearing/grinding action, as opposed to the pulverizing effect of the large, heavy hammers often used in the industrial hammer mills. As a result, the full circle mills are best suited for light, easy to grind materials that do not require initial grinding against a breaker plate.
Some examples include:
Size Reduction 101
When material enters the grinding chamber, it is repeatedly struck by hammers that flail out as the shaft spins. A combination of these hammer blows, particle on particle impact, and impact with the walls of the grinding chamber all work together to break the material down. The material remains in the grinding chamber until it is reduced to a size that will pass through the screen.
The larger the screen area, the greater the opportunity for the material to evacuate the mill. As a result...
Once you have decided that the full circle screen hammer mill is best for your material, determining the following criteria will ensure so that the mill is configured to meet your production goals:
With this information, the following can then be determined:
Answers to these questions will help to determine the best types of optional equipment such as belt conveyors, augers, rotary feeders, and dust collection, as well as the most efficient design of the infeed and discharge chutes.
Topics: full circle screen hammer mills, particle on particle contact, biofuels, briquetting, bio-fuel applications, circular hammer mill, corn, animal feed, corn meal, corn flour, hammer mill design styles
May 18, 2012 3:50:00 PM
Challenging the Industry Standard
In earlier posts we discussed how the simplicity of hammer mill technology lends itself well to many applications. On occasion though we encounter an application where the hammer mill is not only effective, it far exceeds the industry standard. E-scrap processing is one of those areas.
Traditionally, whether the goal is data destruction, recycling of materials - or both, e-scrap has been processed in large industrial shredders. Shredders process the e-scrap by using a shearing action that cuts the material as it passes through claw-like knives. While this is method is effective, drawbacks include frequent maintenance to replace the shredder knives, and the costly price point of the standard industrial shredder.
Hammer Mill 101
Hammer mills process material with a pulverizing action. Rectangular steel hammers are attached to a shaft inside of a steel grinding chamber. As the shaft spins, the hammers flail out, bringing them into contact with the material being processed. A combination of hammer blows, particle on particle impact, and contact with the mill interior, work in unison to reduce the material until it is able to pass through the screen or heavy bar grate covering the mill's discharge opening.
A Better Mousetrap
Now let's look at that process as it relates to e-scrap processing, to see how it is more efficient and effective:
1. Flexibility - The simplicity of the hammer mill design offers great flexibility, making it suitable for processing a wide variety of e-scrap materials down to the exact desired finished particle size. Mill size, hammer style and configuration, and screen size are determined based on the processor's production goals. In fact, multiple types of e-scrap media can be processed in the same hammer mill, without reconfiguration.
2. Complete Data Destruction - As it is pulverized, the e-scrap material is continuously scraped and scoured by the turbulent action within the mill. As a result, all retrievable data is destroyed.
3. Liberation of Metals and Other Materials - The second benefit of the pulverizing process is that the hammering action breaks the e-scrap apart, liberating the metals and various other materials. Once broken apart, all pieces remain in the grinding chamber and continue to be pulverized until they are able to pass through the screen covering the mill's discharge opening.
4. Low Cost, High Production - Hammer mills are available in a range of sizes, and are highly customizable based on the material(s) being processed and the user's production goals. A mid-sized hammer mill configured for computer hard drives can process up to 2500 units per hour. A shredder with the same throughput capacity would cost roughly four times that of the hammer mill.
5. Minimal Maintenance - The knives of the shredder dull quickly, and in many cases must be changed monthly. In comparison, one set of 4-way reversible hammers will, on average, last up to one year.
Apr 12, 2012 3:50:00 PM
You Need a Hammer Mill for That…So, you have a material that you would like to make smaller for a given purpose. Sounds simple, right? Well, in most cases it is. However, there are a number of considerations that must be made to get you to the finish line in the most efficient and most economical way.
But First a Little BackgroundHammer mills are just one type of machinery among the much larger category of size reduction equipment that also includes: shredders, jaw crushers, ram fed grinders, roll mills, ball mills, and more. Looking a bit closer, even within hammer mills, there are several styles to choose from. Among those styles, the functionality of a hammer mill remains basically the same:
Gravity Discharge Industrial Hammer Mills
Pneumatic Discharge Hammer MillsThe grinding mechanism of this group is quite simliar to the gravity discharge hammermills. However, the pneumatic mills typically use a thinner hammer and the interior wall of the grinding chamber features a ribbed liner plate. This plate has a washboard effect on the material, and works in unison with the hammers and particle on particle impact to reduce the material. The biggest difference of course is the group's the use of air assitance to evacuate material from the mill. Whether attached to the main mill shaft, or as a separate optional component in a high production model, the fan pulls the the material through the mill, and conveys it to storage.
Full Circle Screen Hammer MillsThis next group also features the same grinding mechanism as the first two, and the same thin hammers as the pneumatic hammer mills. The amount of screen coverage is what sets the full circle screen hammer mills apart.
Horizontal Infeed Hammer MillsThe unique quality of the horizontal infeed mills is that material is fed into the side of the hammer mill, instead of the top. This design makes them ideal for long, linear or otherwise large, geometric materials to be processed with out a pre-grind. This group includes trim scrap grinders and pallet grinders. As with the prior styles, the horizontal mills use heavy duty screens covering the discharge area to determine finished particle size.
Topics: full circle screen hammer mills, particle on particle contact, size reduction equipment, industrial hammer mill, hammer mills, hammer mill design styles, gravity discharge industrial hammer mill, liner plates, pneumatic discharge hammer mills, ribbed liner plates, air assist, low density materials, abrasive materials, horizontal infeed hammer mills, trim scrap grinder, pallet grinders, feed rolls, stationary hammers, hammers and combs, deagglomeration, delumping