HUANG Dianbing
,
KONG Lingtan
,
LIN ZongcaiUniversity of Science and Technology Beijing
,
Beijing. China
金属学报(英文版)
The oxidation rate of magnetite concentrate is ery quick at the reaction beginning, but it becomes much slower when the reaction is conducted to a certain level because the product layer on the micro particles resists the oxygen diffusion greatly. This phenomena are proved through experiments. And a function is put forward to calculating the quivalent osmosing thickness of the product layer. Based on the function, a mathematical model is established for the whole range reaction process of magnetite in pellets. It is proved that this model fits the real process very well under any condition.
关键词:
Magnetite
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null
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WU Huawu
,
ZHUANG JingTsinghua University
,
Beijing. China
金属学报(英文版)
Bused on the consideration o (?) mass and volume of one atom, a new formula tor calculating the density of simple metal substance from their atomic structure parameters is established. The densities of 66 metals in the periodic table were calculated from this formula. The calculated results are in agreement with the measured values reported in literature. The advantage of the present formula over the others is brie fly discussed.
关键词:
density
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