Abstract: The invention relates to a process for continuously producing a glassy or vitrified blast furnace slag, in which the slag is applied onto a cooling roll or onto articulately interlinked cooling plates conducted as an endless conveyor belt over deflection pulleys and wherein cooling of the slag is effected dry, wherein the liquid slag is supplied to an intermediate storage and from that intermediate storage is continuously applied onto the cooling plate belt, or cooling roll, via a distributing channel in parallel strands at temperatures of above 1350° C., whereupon the cooled slag is thrown off and comminuted or granulated dry in a crusher. The invention, furthermore, relates to an arrangement for carrying out the process.

Abstract: In this method for producing O2 and/or ozone for use in an oxygen consumer and/or an ozone consumer (2, 4), whereby residual oxygen is adsorbed from the consumers and, subsequently, scrubbed in a pressure-swing adsorption system (5); whereby the gas is, at least partially, recirculated to the oxygen consumer or, by preceding it with an ozonizer (3), to the ozone consumer (4); and whereby the amount of oxygen required for the operation of the consumers (2, 4) in addition to the recirculated oxygen is derived from an oxygen source (6, 7) separate from the pressure-swing adsorption system (5) designed for the scrubbing of the recirculated gas.In this connection, the preferred procedure is to feed the gas desorbed from the pressure-swing adsorption system (5) in the process of regeneration, at least partially, into the gas flow adsorbed from the consumers (2, 4) and to recirculate it via the pressure-swing adsorption system (5).