Gundlach in the News

Impact of Crusher-Type and Pre-Screening on Fines Generation

Paper presented by Kip Alderman, President, Advanced Coal Technology, Inc. at Coal Prep 2009, the 26th Annual International Coal Preparation Exhibition & Conference.

Fine coal particles create dust problems in material handling and are more costly to clean in the preparation plant, so minimizing the generation of fines in the crushing process can provide tangible benefits to the mining company. The type of crusher employed and the crusher settings have significant impacts upon the ultimate product fineness.

A study was performed to evaluate the difference in crushers on fines generation. Based upon the results of the study, a screen/hammermill system was replaced with a screen/two-stage two roll crusher system. While not eliminated, dust accumulations were reduced with the new system. Published Paper from Coal Prep 2009 Conference (PDF - 14 Pages)

Crushing Controversy

Rick Dreyer, Gundlach Equipment Corp., US, explains how 100% crush can eliminate prescreening in coal and salt production.

For those coming out of the hard rock and quarry industries, pre-screening is almost an automatic choice in the crushing circuit. But when crushing softer materials such as coal or salt, the urge to pre-screen should be tempered with some careful analysis of what really happens in the circuit. You could save yourself both capital and maintenance costs if you choose a roll crusher that gives you a 100 percent crush. WorldCoal, April 2010 (PDF - 4 pages)

Quick and easy maintenance

Mike Hamby, Gundlach Equipment Corp., US, gives an insight into maintenance-friendly design.

"...when you are faced with changing a damaged crusher roll in the middle of the night.... you know that the ability to return a machine to reliable operation in the shortest amount of time should be a make or break decision for anyone considering the purchase of a new crusher." WorldCoal, September 2009 (PDF - 3 pages)

Gundlach Crushers: First in Coal

Gundlach developed the first single-stage, two roll crusher for coal mines, the first two-stage, four roll crusher, the first and only 3-D crusher and the first high tonnage breakers for PRB coal.

This article provides a brief overview of how Gundlach's crusher technologies have evolved with the coal mining industry. Coal People, Spetember 2009 (PDF - 2 pages) 

Crusher Technologies that Derive More Value from the Coal You Mine

How A Roll Crusher May Reduce Complexity and Cost While Improving Quality, Using Cage Mills for Smaller SIzes, and Crushers for Lower Grade Applications

"When developing a crusher application design, you can add significant value to the process by selecting a crusher that will do the job without the aid of expensive screening and blending devices." CPSA Journal, Vol. 8, No.1 - Spring 2009 (PDF - 4 pages) 

The Old Man and the Coal Crusher

Born with a Penchant for Mechanics, The Self-Taught Engineer Sketched Out Plans for the First Three-Dimensional Roll Crusher at His Kitchen Table

"They called him 'The Henry Ford of the Coal Crusher' -- The man who revolutionized the crusher. Gundlach's Rick Dreyer and Mike Hamby describe the rich history and founding father of Gundlach Equipment Corporation." Coal People, April 2009 (PDF - 8 pages)

Getting It Right

Gundlach's Mike Hamby describes the complex nature of crushing

World Coal, February 2006 (PDF - 3 pages) 

The Finer Points

Gundlach's Rick Dreyer discusses the evolution of crushing methodology

World Coal, September 2005 (PDF - 3 pages)

The Finer Points (Chinese)

In this Chinese language edition, Gundlach's Rick Dreyer discusses the evolution of crushing methodology

World Coal China Edition, 2006 (PDF - 3 pages) 

 

Improving Coal Handling Effectiveness

Appropriate coal handling systems are essential for successful coal utilization

World Coal, October 2003 (PDF - 4 pages)