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Using A Trommel For Placer Processing
April 2010 by Chris Ralph
The behavior of a trommel is dependent on how it is designed and set up. Important design characteristics include feed rates, screen perforation sizes, cylinder size, rotation speed and incline.
Additional articles that might interest you...
Early Winter Detecting in the Sierras
January 2017
The mine site consists of river gravels from an ancient channel covering over 20 acres, and the place is covered with very large river rock and small tree overgrowth.
The mine site consists of river gravels from an ancient channel covering over 20 acres, and the place is covered with very large river rock and small tree overgrowth.
The Mole
June 2012
My wife Dorothy has always enjoyed tent camping. She thought she was really roughing it at established campgrounds until I convinced her to take a trip with me to drywash for gold in a remote corner of an arid desert wilderness...
My wife Dorothy has always enjoyed tent camping. She thought she was really roughing it at established campgrounds until I convinced her to take a trip with me to drywash for gold in a remote corner of an arid desert wilderness...
Oil Seeps in Northern California
July 2001
Indians used asphalt from oil seeps in California for caulking boats and other objects long before the white man arrived. Spaniards noted seeps as early as 1542, and the Portola expedition in 1769 used oil for wagon axles and as a fuel. Spaniards also used crude stills for obtaining lamp oil for use in the missions.
Indians used asphalt from oil seeps in California for caulking boats and other objects long before the white man arrived. Spaniards noted seeps as early as 1542, and the Portola expedition in 1769 used oil for wagon axles and as a fuel. Spaniards also used crude stills for obtaining lamp oil for use in the missions.
The Fern Mine
July 2004
Sharp, jagged mountains shot up around me as I slowly bumped my way, in my old Chevy pickup, up the boulder strewn mining road to the Fern Mine. The Fern Mine is situated on the west side of Archangel Creek, where several other hard rock mines once operated.
Sharp, jagged mountains shot up around me as I slowly bumped my way, in my old Chevy pickup, up the boulder strewn mining road to the Fern Mine. The Fern Mine is situated on the west side of Archangel Creek, where several other hard rock mines once operated.
Federal Court to Address Dredge Permits—The Tulloch Rule
April 2006
Congress passed Section 404 of the Clean Water Act (CWA), which was originally called the Federal Water Pollution Control Act, 33 USC 1344, in 1972. Section 404 authorized the US Army Corps of Engineers (the Corps) to issue permits “for the discharge of dredged or fill material into the navigable waters at specified disposal sites.”
Congress passed Section 404 of the Clean Water Act (CWA), which was originally called the Federal Water Pollution Control Act, 33 USC 1344, in 1972. Section 404 authorized the US Army Corps of Engineers (the Corps) to issue permits “for the discharge of dredged or fill material into the navigable waters at specified disposal sites.”
Legislative and Regulatory Update
July 2009
• Roadless Rule back in play
• Action needed on SB 670
• Abbey recommended to head BLM
• Capped and jobless
• S 787
• SB 796 & HR 699
• Roadless Rule back in play
• Action needed on SB 670
• Abbey recommended to head BLM
• Capped and jobless
• S 787
• SB 796 & HR 699
Rattlesnakes
August 2002
Every miner has encountered rattlesnakes in his work, and some may have been bitten. The writer has never been bitten, but has worked with people who have been. It is not a pleasant experience.
Every miner has encountered rattlesnakes in his work, and some may have been bitten. The writer has never been bitten, but has worked with people who have been. It is not a pleasant experience.
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The Bawl Mill
• Legislative and Regulatory Update
• Prospecting for Hardrock Gold - Part II
• Gold in Alaska - Part II
• Gold Prospecting in Maine - Part I
• Gold Prospecting Is For Ladies, Too
• Sage-Grouse Won't Get ESA Listing For Now
• How to Find Gold in Hot Ground With A VLF Detector
• Oregon County Tries to Interfere With Lawful Mining Operation
• Melman on Gold & Silver
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