PROCESS AND APPARATUS FOR SUPPLYING A MIXTURE OF CO2 AND SO2 OR A LIKE MIXTURE UNDER PRESSURE

摘要

The gaseous CO2 is supplied at a pressure of 10 bars and at a constant rate of flow to the primary inlet (3) of an aspiration device (1). Gaseous SO2 coming from a cylinder (24) which is heated and contains liquid SO2 is conducted through a heated line (4) provided with an adjustable flow meter (27) to the secondary inlet (5) of the aspiration device. The mixture issuing from the latter is injected into a buffer tank (6) whose pressure is regulated at a value higher than the pressure of utilization and is drawn from this buffer tank when utilized. Applications in the supplying of mixtures for hardening sand moulds or cores to foundries of medium size.