Downloadable White Paper Supports Use of Trommel Magnets And Wet Drums Ahead of Flotation and Cyanidation; Examines Effects of Tramp Grinding Steel an

Press Release:
  Jan 14, 2014 — Erie, PA —A new white paper exploring the effects of tramp grinding steel and iron fines on comminution, flotation and cyanidation is now available for free, immediate download from the Eriez® website.

“This paper makes a good argument for the Trommel Magnet and Wet Drums ahead of flotation and cyanidation,” explains Bill Dudenhoefer, Manager—Heavy Industry at Eriez. “We are hosting this white paper as part of our commitment to customer education and problem-solving so they may benefit from the valuable insight it provides.”

The six-page paper, authored by H.K. Lin and D.E. Walsh, Professor and professor (retired), Mineral Industry Research Laboratory at University of Alaska Fairbanks and H. Yen, former graduate student, Department of Mining and Geological Engineering at University of Alaska Fairbanks, originally appeared in “Minerals & Metallurgical Processing,” 2013, Vol. 30.

The abstract explains, comminution circuits are widely used in nonferrous and precious metals milling. Steel crushers, grinding mills and grinding media are typically used in comminution circuits. Comminution circuit wear products, in the form of metallic iron (steel) fines, are unavoidably produced and report to undersize products in the classification circuit, i.e., flotation or leach feed, while tramp grinding steel (TGS) reports to classification oversize products and returns to the grinding mill, building up in the circulating load.

In laboratory studies, TGS reduced grinding efficiency significantly, the impact being dependent upon the size of the TGS present in the mill. Because iron fines adsorb flotation reagents effectively, iron fines increase reagent consumption and reduce flotation recovery. Iron fines are also capable of reducing gold recovery in cyanidation circuits via a cementation reaction. When using filtered gold solution from the cyanidation circuit of an Alaskan gold mine, the gold concentration in solution was reduced by 0.2 to 2.6 percent over various reaction periods when iron fines were present in the solution

“Effects of Tramp Grinding Steel and Iron Fines on Comminution, Flotation and Cyanidation” is available online (See Links Below)

Eriez is recognized as world authority in separation technologies. The company’s magnetic lift and separation, metal detection, materials feeding, screening, conveying and controlling equipment have application in the process, metalworking, packaging, plastics, rubber, recycling, mining, aggregate and textile industries. Eriez manufactures and markets these products through 12 international facilities located on six continents. For more information, call toll-free (888) 300-ERIEZ (3743) within the U.S. and Canada. For online users, visit or send email to Eriez World Headquarters is located at 2200 Asbury Road, Erie, PA 16506.
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Tags: white paper, trommel magnet, wet drums, heavy industry, University of Alaska Fairbanks, Mineral Industry Research Lab, cyanidation, floatation, iron
Company Details:
 Contact:John Blicha 
 E-mail:lwhaling -at- eriez -dot- com 
 Company:ERIEZ View Company Profile 
 Address:work2200 Asbury Road 
 Location:workErie, PA 16506  United States 
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