Read Now »

• Home »
• Contact »
• Subscribe »
• Advertise »
• All Issues »

• Inside the Current Issue

  Now available on the iPad/iPhone

  • The Challenges and Potential of Canada’s Oil Sands »
  • Oil Sands Mining Equipment Built Tough »
  • Oil Sands Tailings: What Needs to be Done »
  • Insitu: Oil Sands Mining Goes Underground »

• Reduced energy consumption for mine conveyor systems »
  September 7, 2010
• Bonfiglioli alignment-free drives save time and money for Lihir Gold »
  September 7, 2010
• Indaba to focus on Zimbabwe’s business environment »
  September 7, 2010
• more news »

	The Mining Buyer's Guide Consulting Services » Environment & People » Exploration » Mine Planning » more » Contracting » Drilling » Mineral Processing » Underground Mining » more » Equipment & Supplies » Drilling & Blasting » Crushing & Conveying » Pumps & Pipelines » more » Supplies & Consumables » Buildings & Structures » Mineral Processing » Software » more » Support Services » Education & Training » Health & Safety » Transportation & Travel » more »

	Buy & Sell Surface » Underground » Crushing & Conveying » Parts » Support » Processing » Electrical » Other » Search » Cone Crushers » Agitators » Haul Trucks » Underground Loaders » Generators » more »

• Environmental »
• Exploration »
• Geotechnical »

• Management »
• Methods »
• Minerology »

Mining Field: Crushers and Rockbreakers
Area: Crusher Design (Rule #489)

For most applications, 7:1 is the maximum practical reduction factor (ratio) for a jaw crusher, but 6:1 represents better design practice.

• Excellence in Mining and Exploration »
  Australia | September 20, 2010 - September 22, 2010
• 2010 Toronto Resource Investment Conference »
  Canada | September 25, 2010 - September 26, 2010
• Excellence in Mine Health and Safety Summit »
  South Africa | September 27, 2010 - September 30, 2010
• SEG 2010 Conference - The Challenge of Finding New Mineral Resources »
  USA | October 2, 2010 - October 5, 2010
• COM2010 - Conference of Metallurgists »
  Canada | October 3, 2010 - October 6, 2010
• Electra Mining Africa 2010 »
  South Africa | October 4, 2010 - October 8, 2010
• Global Executive Mine Management Summit (GEMMS) »
  Indonesia | October 11, 2010 - October 14, 2010
• Mining Investment Insight 2010 and Mongolia Investment Summit 2010 »
  China | October 11, 2010 - October 14, 2010
• Mining in Botswana »
  Botswana | October 18, 2010 - October 21, 2010
• 2010 Montreal Resource Investment Conference »
  Canada | November 5, 2010 - November 6, 2010
• China Mining 2010 »
  China | November 16, 2010 - November 18, 2010
• San Francisco Hard Assets Investment Conference »
  USA | November 21, 2010 - November 22, 2010
• Quebec Exploration 2010 »
  Canada | November 22, 2010 - November 25, 2010
• 2011 Vancouver Resource Investment Conference »
  Canada | January 23, 2011 - January 24, 2011
• 2011 Phoenix Resource Investment & Silver Summit »
  USA | February 18, 2011 - February 19, 2011
• more events »

• Metorex expects copper demand and prices to rise  »
  September 7, 2010
• Forensic report concerning ZAR500m in cash from missing Wesize Platinum shares released »
  September 7, 2010
• Chinese minister says security concerns can't excuse protectionism »
  September 7, 2010
• First Quantum accuses ENRC of misleading investors over DRC copper mine »
  September 7, 2010
• How likely is a Chinese bid for Potash Corp? »
  September 7, 2010
• Giant Oyu Tolgoi copper/gold mine on track for Q4 2012 start-up »
  September 7, 2010
• Kinross Gold and Red Back confirm increased Tasiast gold resource and potential »
  September 7, 2010
• Genco receives favourable Mexican tax ruling »
  September 7, 2010
• Where does a long and slow recovery leave the gold price? »
  September 7, 2010
• more news »

Notícias em Português - News in Portuguese »

	Commodity News Aluminum » Coal » Cobalt » Copper » Diamond » Gold » Iron Ore » Lead » Molybdenum » Nickel » Oil (Oil Sands) » Palladium » Platinum » Silver » Tin » Titanium Uranium » Zinc »

• Great Western Minerals Group Closes Private Placement to Purchase 20.8 pct of Rare Earth Extraction Co. Limited Shares »
  September 7, 2010
• Stratabound options Quebec gold prospect »
  September 7, 2010
• EXPLORATION ORBITE BEGINS THE IMPLEMENTATION PHASE OF ITS PILOT PROJECT »
  September 7, 2010
• Balmoral to Acquire Advanced Package of Canadian Gold Assets; Announces $15 Million Financing »
  September 7, 2010
• First Liberty Power Corp. Commissions Additional Gravity Survey on Lida Valley Lithium Claim »
  September 7, 2010
• TSX moderates loss as gold closes at record high; financials, energy fall »
  September 7, 2010
• China orders steel output cut, steelmakers surge »
  September 7, 2010
• DIAMCOR RECEIVES CONFIRMATION OF SECTION 11 CONSENT FOR KRONE-ENDORA ACQUISITION »
  September 7, 2010
• more news »

	Industry Focus Geology & GeoSciences » Environmental Sciences » Engineering » Mill & Metallurgy » Mining Production » Management & Administration » Technicians » Mechanical » Trade & Skilled »

• Principal Mining Consultant »
  Canada | September 8, 2010
• Office Administrator »
  Canada | September 8, 2010
• Senior Resource Geologist »
  Canada | September 8, 2010
• Safety Advisor »
  Canada | September 8, 2010
• Six Sigma Black Belt »
  Canada | September 8, 2010
• Managing Director (Gold Mining / Industrial Minerals / Middle East) »
  International | September 7, 2010
• Engineer – GCC - Mines »
  South Africa | September 7, 2010
• Project Controls Specialist  »
  Canada | September 7, 2010
• Senior Mining Consultant »
  Canada | September 7, 2010
• Financial Director  »
  Angola | September 6, 2010
• more jobs »

	Most Active Commentary All One River » Barkerletter » Drifting & Sinking, but in a good way » Frank Talk: Insight for Investors » Freebuck.com » Goldmau.com » GoldPrice.org » Gold Speculator » Gold Stock Bull » International Mining » I Think Mining » MetalMiner » Nevada Gold Investor » Republic of Mining » Seeking Alpha Gold & Precious Metals » 24Gold.com »

• Beijing’s New Stimulus Package, This Time for Renewables »
  September 7, 2010
• Tuesday's Opening Gold Moonshot »
  September 7, 2010
• The Problem With Gold Stocks »
  September 7, 2010
• Q2 Gold Demand Surges by 36% as Paper Shorts Cover »
  September 7, 2010
• Obama + Bernanke = A Higher Gold Price »
  September 7, 2010
• Environmental Concerns a Boon for Impala Platinum »
  September 7, 2010
• Latest Economic Data Still Paints a Longer Term Ugly Picture or Does It? »
  September 7, 2010
• Gold, ETF Nearing All-Time Highs »
  September 7, 2010