1/03/2013


Industrial Standard of Iron Ores in China

1.       Iron ores for Steel-making
Iron Ores
TFe
(%)
Max. content of impurities (%)
Other impurities
(%)
SiO2
S
P
Magnetite
≥56
≤13
≤0.15
≤0.15
Cu≤0.2
Ag≤0.1
Hematite

Posted by Felicity Yuan On 4:40:00 PM No comments READ FULL POST

1/01/2013


Definition of Beneficiation
Definition: through the physical or chemical diversity of minerals, separating ore into valuable substances and waste (gangue) by any of a variety of mining equipment, to enrich the useful minerals.
Usually run-of-mine ores are composed of useful minerals and gangues. Grade of useful minerals is not high enough for industrial purpose. Beneficiation is to purify and enrich them to make them concentrates.
e.g.
Beach placer (beach sand) contains a variety of minerals, such as quartz, zircon sand, ilmenite, rutile, garnet, monazite, hematite, hornblende, silimanite, etc. If the grade of zircon is relatively high and has a value of market development, we can use washing, spiral separation, magnetic separation, flotation, and other processes, to move other minerals, especially the radioactive monazite, and get upgraded zircon concentrate. 
By wet high gradient magnetic separator, beach sands are separated into three parts: non-magnetic silica sands, feebly magnetic ilmenite and weaker magnetic garnet

Posted by Felicity Yuan On 10:39:00 AM No comments READ FULL POST
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