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ArticleName The effect of thermal transformations in oil shale on their properties
DOI 10.17580/tsm.2017.07.05
ArticleAuthor Nazarenko M. Yu., Kondrasheva N. K., Saltykova S. N.

Saint-Petersburg Mining University, Saint Petersburg, Russia:

M. Yu. Nazarenko, Post-Graduate Student, e-mail:
N. K. Kondrasheva, Head of a Chair
S. N. Saltykova, Assistant Professor


According to the experts, the oil shale industry is the world’s largest industry when it comes to processing of low-grade mineral raw materials, their production and their transfer on a large scale. The mineral part of oil shale and shale ash is actually an interesting multi-purpose raw object. Its complex use (including not only its organic, but also inorganic part) will improve the efficiency of oil shale in various fields of industry. Departing from mineral and chemical composition of the inorganic portion of oil shale, conclusions were made about their possible use as a carbonaceous reducing material (the organic carbon component will act as a reducing agent, and the mineral component as a fluxing agent). Oil shale ash can be used as a fluxing agent. It is a waste, produced during the processing of oil shale, so no additional costs are required for its manufacture. The aim of this work was to determine the effect of temperature on the properties of oil shale. It was established that, regardless of the atmosphere heat treatment (air or nitrogen), the porosity of oil shale is changed in 4 steps: I — 25–200 °С; II — 200–400 °С; III — 400–600 °С; IV — 600–900 °С. The resistivity of various fractions of oil shale does not vary much, whilst it decreases when the temperature is increased, from 37.93·106 to 0.17·106 Ohm·cm. The results of simultaneous thermal analysis led to the conclusion that the change of oil shale mass occurs in five stages, resulting in 43.5% loss of mass in total.

keywords Oil shale, carbon materials, complex use, non-organic part, fluxing agent, oil shale ash, mineral raw material, carbonaceous reducing material

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