Stages of thermal transformation of organic-mineral oil shale matter of Middle Volga region in burning

Studying of staging of thermal transformation of the combustible slates extended to territories of Central Volga area is carried out. It is established that organic substance of breeds at the expense of multicomponent structure undergoes multistage pyrolysis in the range of temperatures 200-600 оС. Optimum temperature of pyrolysis when about 80% of potential heat of slates are allocated to fall on an interval of 460-480 °C. The main thermal transformations cindery components are carried out at temperatures over 480 °C. They are caused by allocation from structure of clay minerals HE - groups, pyrites oxidation, decomposition of calcite and formation of shpinelid.