Abstract: An apparatus for manufacturing a ring-shaped member from an elongate workpiece comprises a measuring mechanism for measuring an elongate workpiece straightened from a coiled elongate workpiece to a specified length, a feeding mechanism for feeding the measured length of the elongate workpiece, a coiling mechanism having bending rollers for bending the elongate workpiece fed by the feeding mechanism to a curved shape, and guide members for guiding a leading end portion of the bent elongate workpiece to form a coiled portion from the elongate workpiece, and a cutting mechanism for cutting the coiled portion off the elongate workpiece into a ring-shaped member.

Abstract: A process for the thermal cracking of heavy oils with a fluidized particulate heat carrier is carried out while recovering particles of the heat carrier accompanied by a stream of the reaction product by means of a cyclone and a gravitational separator, returning the particles of the heat carrier recovered by the cyclone directly to the reactor and returning the particles of the heat carrier recovered by the gravitational separator to the reactor in the form of suspension in a cracked oil.