An initial assessment of the effectiveness of cast iron inoculation, performed by the method of impulse introducing the master alloy into

cast iron, is presented. The experiment was concerned with the hypoeutectic gray cast iron inoculated with either the Alinoc or the Barinoc

master alloy by means of an experimental device for pneumatic transportation. Examinations involved pneumatic injection of the

powdered inoculant carried in a stream of gaseous medium (argon) into the metal bath held in the crucible of an induction furnace. It was

found that the examined process is characterised by both high effectiveness and stability.