26 Coal People Magazine www.coalpeople.com

pigtail or rubber springs. The springs are always in compression and never go into tension. Pigtail springs are subject to reversing loads while rubber springs are unstable due to temperature changes, heat build up and/or shelf life. Electromagnetic feeders are also used in the aggregate industry. Jeffrey Rader’s design operates at a higher stroke, therefore, in many applications we are able to drop a deck size due to higher capacity ratings. We currently stock 36” x 60” (EF3) and 42” x 60” (EF4) electromagnetic feeders which are common sizes used in the aggregate industry.

Jeffrey Rader takes pride in its excellent service provided under both normal conditions and emergency situations. The new CentroloadTM is an example of the type of engineering excellence that Jeffrey Rader provides to its customers worldwide. Please visit our website to see the CentroloadTM in motion. Jeffrey Rader Corporation has been an innovative manufacturer of vibrating feeders for more than 70 years. Designed, engineered and manufactured at the Woodruff, South Carolina facility insures exceptional quality control.

Jeffrey Rader is a global leader in material handling and size reduction equipment. You can find Jeffrey Rader equipment and systems installed throughout the world, providing reliable operation in the pulp and paper, coal, aggregate, biomass, petro-chemical, forest products, mining and many other industries.

anson Aggregates operation in Taylors, South Carolina (known as Sandy Flat) is open to innovative ideas and change. Hanson Aggregates is part of Lehigh Hanson,

Inc., one of North America’s largest suppliers of heavy building materials to the construction industry. The plant had been operating a 16 year old feeder that was experiencing excessive downtime. Parts were proprietary and availability limited. When the feeder experienced a problem, the material flow had to be diverted around the cone crusher to a screen. As a result, additional manpower was required to oversee this change in plant material flow. In December of 2008 Jeffrey Rader introduced their CentroloadTM Feeder as an attractive solution to Hanson’s excessive downtime and costly repairs. However, the CentroloadTM also offered an innovative way to feed the cone crusher that created additional value for Hanson in reduced wear on the crusher and a better end product.

Traditionally, the aggregate industry uses a standard pan feeder with a Rotating Feed Distributor (RFD) over the Cone Crusher to ensure material distribution. This equates to twice as much equipment and maintenance. When servicing the Cone Crusher, it also requires that more equipment be removed to access the wear parts. With the CentroloadTM, what used to take two machines, now only requires one.

The design and operation of the CentroloadTM Feeder allows material to travel around and into a circular feed spout at the discharge end in lieu of feeding from the end of a straight pan. This unique design insures that the material is evenly distributed around the circumference of the cone crusher providing a better size distribution of the material. The new unit incorporates many of the operating advantages of Jeffrey Rader’s standard electromechanical vibrating feeder such as precompressed steel springs, standard motor, and eccentric weighted shaft drive arrangement.

The Hanson Sandy Flat facility located approximately 40 miles from the Jeffrey Rader manufacturing plant in Woodruff, SC, was a perfect test site for the CentroloadTM Feeder. The Plant Manager at Sandy Flat, Andy Ward, is extremely pleased with the new feeder. Since its installation on March 23, 2009, no replacement parts have been ordered to date. “We are experiencing more consistent feed and fines distribution into the crushing cavity and approximately 15% more crusher liner utilization due to better feeding capability” says Mr. Ward. As a brief overview of the vibratory feeder line: electromechanical feeders use a precompressed steel coupling spring versus a

Jeffrey Rader Delivers!

CentroloadTM Creates Additional Value for Hanson Aggregates

H

Andy Ward, Hanson Plant ManagerCarla Phelps, Vibratory Feeder Manager, Jeffrey Rader