Method for pretreating sintering material
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United States of America Patent
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Sep 16, 2014
Grant Date -
Feb 19, 2009
app pub date -
Nov 11, 2005
filing date -
May 10, 2005
priority date (Note) -
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Abstract
A method for pretreating a sintering material using as a material at least two types of iron ore containing coarse grains and fine powder, using a first granulator to make the fine powder stick to coarse grains forming core grains so as to produce S-type granules, and using a second granulator to granulate only fine powder or mainly fine powder to produce P-type granules, which method producing the S-type granules by adjusting an amount of fine powder supplied into said first granulator so that the average stuck thickness of fine powder to the core grains becomes 50 to 300 μm and supplying the remaining fine powder not supplied to said first granulator to the second granulator.
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