X-ray Spectral and Morphological Studies of the Products of Crushing and Direct Hydrogen Reduction of Iron Ore of the Lena Ore Field of the Republic of Sakha (Yakutia)
Abstract
The results of X-ray elemental and phase analysis, morphological studies of the products of crushing and direct hydrogen reduction of the Lena ore field iron ore are described. The lack of selective ore dressing of the individual elements of the class size during milling, depending on the strength and hardness of the raw mineral phases is revealed. The ore contains low content of detrimental impurities. After annealing in a re- ducing atmosphere of hydrogen there is a reduction of oxygen content in the ore material, which value is slightly different in size classes. At the same time, the Fe content increases with the size of the class, reaching its maximum at a class size 1–0,5 mm. The initial particles have the splintered form, due to the grinding pro- cess. There is a pronounced relief of the surface of the particles in ore reduction products, the formation of a spongy surface. Individual particles have a heterogeneous chemical and mineral composition, they are com- posed of grains of different phases with sizes from several microns to 80 microns. Principle suitability of the method of direct reduction with hydrogen in relation to Lensky ore field iron ore is established.
About the Authors
Petr Petrovich Tarasov
Larionov Institute of Physical and Technical Problems of the North SB RAS
Ammosov North-Eastern Federal University
Russian Federation
Russian Federation
Boris Yurievich Pryadeznikov
Larionov Institute of Physical and Technical Problems of the North SB RAS
Ammosov North-Eastern Federal University
Russian Federation
Russian Federation
Petr Petrovich Petrov
Larionov Institute of Physical and Technical Problems of the North SB RAS
Russian Federation
Russian Federation
Ksenia Valerievna Stepanova
Larionov Institute of Physical and Technical Problems of the North SB RAS
Russian Federation
Russian Federation
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Review
For citations:
Tarasov P.P., Pryadeznikov B.Yu., Petrov P.P., Stepanova K.V. X-ray Spectral and Morphological Studies of the Products of Crushing and Direct Hydrogen Reduction of Iron Ore of the Lena Ore Field of the Republic of Sakha (Yakutia). Arctic and Subarctic Natural Resources. 2016;21(3):67-75. (In Russ.)
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