METHOD OF OBTAINING WORK PIECES FROM FINE-GRAINED GRAPHITE Russian patent published in 2013 - IPC C01B31/04 B82B3/00 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: invention can be applied in electronics, solar energy industry, atomic industry, metallurgy. Pitch coke is tempered at 1200-1300 °C during 2-3 hours. Then its vibration grinding is carried out until middle-sized particles in the range 5-20 microns are obtained. Coal pitch is modified by mixing with carbonaceous nano-additive in quantity 0.2-1.2 wt %, heated with mixing to 280-300 °C, cooled to temperature of the environment and crushed to size 2 mm. Coke, pitch with nano-additive and stearic acid are dosed and mixed in mixing machine at 210-270 °C. Obtained mass is cooled to temperature of the environment, crushed by jaw and hammer crushers, milled by vibration mill until press-powder of required coarseness is obtained, with its further pressing on isostatic press. Obtained work pieces are burned, impregnated, re-burnt, graphitised and mechanically processed.

EFFECT: invention makes it possible to obtain products of large size with high physical-chemical characteristics.

5 cl, 5 tbl