دورات هندسية

 

 

World Uranium Mining

النتائج 1 إلى 2 من 2
  1. [1]
    الصورة الرمزية alshangiti
    alshangiti
    alshangiti غير متواجد حالياً

    مشرف وإستشاري هندسة المناجم

      وسام مشرف متميز


    تاريخ التسجيل: Mar 2007
    المشاركات: 1,472
    Thumbs Up
    Received: 89
    Given: 8

    World Uranium Mining



    Nuclear Issues Briefing Paper 41

    July 2007
    • Over half of the world's production of uranium from mines is from Canada, Australia and Kazakhstan.
    • An increasing proportion is produced by in situ leaching.
    • After a decade of falling mine production to 1993, output has generally risen since then and now comprises 61% of demand for power generation.

    Canada produces the largest share of uranium from mines (25% of world supply from mines), followed by Australia (19%) and Kazakhstan (13%). Australian and Canadian production was depressed in 2006 due to particular problems.

    Production from mines (tonnes U)
    country2002200320042005 2006 Canada116041045711597116289862Australia68547572898 295167593Kazakhstan28003300371943575279Niger307531 43328230933434Russia (est)29003150320034313262Namibia 23332036303831473067Uzbekistan18601598201623002260 USA91977987810391672Ukraine (est)800800800800800China (est)730750750750750South Africa824758755674534Czech Repub.465452412408359India (est)230230230230177Brazil270310300110190Romania (est)9090909090Germany2121501507750Pakistan (est)3845454545France200775Total world36 06335 61340 25141 70239 429tonnes U3O842 52941 99847 46849 17946 499
    WNA Market Report data
    Mining methods have been changing. In 1990, 55% of world production came from underground mines, but this shrunk dramatically to 1999, with 33% then. From 2000 the new Canadian mines increase it again, and with Olympic Dam it is now 50%.
    In 2006 production was as follows:
    underground41%open pit24%in situ leach (ISL)26%by-product9%
    (considering Olympic Dam as by-product rather than in underground category)
    In the 1990s the uranium production industry was consolidated by takeovers, mergers and closures. In 2006, the eight companies marketing most of the world's uranium mine production were:
    companytonnes UpercentCameco824920.9Rio Tinto709418.0Areva527213.4KazAtomProm36999.4TVEL32 628.3BHP Billiton28687.3Navoi22605.7Uranium One10002.5Total top 833,70485.5%
    The largest-producing uranium mines in 2006 were: minecountrymain ownertypeproduction (tU)% of worldMcArthur RiverCanadaCamecoUnderground720018.3RangerAustrali aERA (Rio Tinto 68%)open pit402610.2RossingNamibiaRio Tinto (69%)open pit30677.8KraznokamenskRussiaTVELunderground29007. 4Olympic DamAustraliaBHP Billitonby-product /u'ground28687.3Rabbit LakeCanadaCamecounderground19725.0AkoutaNigerAreva/Onaremunderground18694.7ArlitNigerAreva/Onaremopen pit15654.0AkdalaKazakhstanUranium OneISL10002.5Highland -
    Smith RanchUSACamecoISL7862.0BeverleyAustraliaHeathgateI SL6991.7McClean LakeCanadaCogemaopen pit6901.7top 12 total28,64272.6%
    New Mines
    Canada has two major mines which came into production in 1999: Cameco's McArthur River deposit has enormous high-grade reserves and supplies ore from its underground mine to the Key Lake mill, to produce some 7200 tU/yr. Areva's McClean Lake mine can produce over 2000 tU/yr.
    Cameco's Cigar Lake underground mine is being developed for 2010 or 2011 start-up. It will truck ore for treatment at McClean Lake and Rabbit Lake mills, 70 km away, to produce 7000 tU/yr. Areva's Midwest mine is ready to develop, with ore milled at McClean Lake nearby, to produce 2200 tU/yr.
    With all these operating, Canadian output could be substantially be concentrated at two mills: McClean Lake producing about 7800 tU and Key Lake 10,700 tU per year, with about 2300 t/yr coming from Rabbit Lake. All this will be about half of projected world mine production.
    (See also UIC Briefing paper #3 on Canada.)
    In Australia there are plans to triple the uranium output of Olympic Dam, to about 12,700 tonnes U per year. Meanwhile the three Australian mines produce some 8000 tonnes U per year, bout 20% of world mine production.
    (See also UIC Briefing paper #1 on Australia)
    Western World Uranium Production and Demand 1945-2004
    Source: World Nuclear Association

  2. [2]
    احمد محمد عبودي
    احمد محمد عبودي غير متواجد حالياً
    عضو فعال


    تاريخ التسجيل: Jul 2008
    المشاركات: 51
    Thumbs Up
    Received: 1
    Given: 0
    شكرا جزيلا

    0 Not allowed!



  
الكلمات الدلالية لهذا الموضوع

عرض سحابة الكلمة الدلالية

RSS RSS 2.0 XML MAP HTML