METHOD OF MECHANICAL-THERMAL PURIFYING PAVING SLAB FROM HYDROCARBON IMPURITIES Russian patent published in 2016 - IPC E01H1/00 E01H15/00 B08B3/10 

FIELD: technological processes.

SUBSTANCE: invention relates to a technology of mechanical-thermal purifying surfaces, for example, based on concrete, clay, sand and gravel chips, from residues of hydrocarbon impurities, in particular, such as fats and oils, oil products, stick chewing gum, paint, and can be used in the housing and utilities sector. Purifying method comprises selection of the type of impurities, preliminary mechanical purification, heating, mechanical purifying and final washing with weak solution of soap water. Contaminated points are being heated by direct flame burning at temperature in the range from the ambient temperature to 600 °C untill ash or soot is being formed, and then heating points are being cooled to the ambient temperature.

EFFECT: method provides higher quality of purifying and versatility of using the method to various types of hydrocarbon compounds.

3 cl