The laboratory equipped within an industrial complex is used to examine all main quality indicators of the water coal and for the runtime control of its characteristics.
Total water content
To determine the total water content, an accelerated drying method is used. Boxed samples 10 grams each are placed in a preheated cabinet, where they are dried until achieving a constant mass under 160°C.
Detecting the granulometric composition is conducted manually by wet sieving. The dimensions of the loose material are estimated by the contents of the particles of the predefined classes.
The detection of the ash content for the water coal fuel is conducted using the usual coal ash content detection method, which is comprised of complete burning of the weighted sample, baking the ash content under 815°C and determining the mass of the resulting ash.
Volatile substances emission
Volatile substances emission is determined by the mass loss of the original weighted sample with the deduction of its water content after its heating under 850°C for 7 minutes in the absence of oxygen.
Heat of combustion
To determine the heat of combustion a unified method is used – a combustion of a weighted sample in pressurized air environment in hermetically sealed vessel (calorimetric bomb).
To determine a total sulfur content (total sulfur content in the organic and mineral mass), a classical Eshka method is used, which is considered an arbitration.