2012年（124）
分类： IT业界
2012-03-22 16:06:38
Hand-selected method is based on the lithium minerals and gangue minerals in
the differences in color and appearance to achieve the purpose of sorting a
sorting method. The sorting of particle size is generally 10 to 25 mm, determine
the minimum size sorting, depending on economic efficiency.
Hand-selected
produce lithium ore beneficiation methods used in the earliest history of the
United States early in 1906 on the use of this method from the South Dakota
Black Hills region pegmatite deposits in the production of spodumene
concentrate. In addition to spodumene, but also hand-selected for the production
of lithium mica, feldspar through the lithium, lithium phosphate rock, lithium
aluminum ore.
U.S. South Dakota Black Hills area is the first U.S. lithium
mining mining, has hand-selected method from the selected pegmatite minerals
spodumene concentrate, and sometimes with recovery of some of the mineral
feldspar, and heavy metals.
Black Mountain a deposit containing Li2O 1.5% ~
1.7%, mainly by the mineral spodumene, quartz, feldspar, albite, muscovite,
apatite and tourmaline components. 1948 hand-chosen selection method was 10.5%
of the production of spodumene concentrate grade of 4.8% Li2O, the recovery rate
of 30% to 40%, due to low economic efficiency, the reform of the process plant
in 1949, 3.3 ~ 38 mm grain size to switch to heavy media beneficiation, 38 to
300 mm size fraction of ore are still hand-selected to remove waste
rock.
China’s 50 years in a mine and three mines in Xinjiang has been
hand-selected production of spodumene concentrate, ore containing 1.5% ~ 1.8%
Li2O, hand-picked concentrate grade 5% ~ 6% Li2O, 20% to 30% recovery
rate.
Hand-picked law because of labor-intensive, low productivity, poor
mineral indicators, a large waste of resources, has been generally replaced by
flotation or other methods, but in the areas of cheap labor, is still a
hand-picked from the coarse cloth embedded lithium ore production of lithium
concentrates in important ways.
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