Abstract: Described is a mobile plant for the aspiration, treatment, suppression and depuration of fumes and/or dust and/or gaseous mixtures coming from processing of metals or other materials, and in particular from the processing of the metals with flame cutting, by means of which even small production units or larger production units but with limited quantities of materials to be processed or processed in an occasional manner with significant emission of fumes and/or dust can prevent the dispersion into the atmosphere of the fumes and/or dust and can treat the fumes and dust; according to this invention, the mobile plant for the aspiration, treatment, suppression and depuration of fumes and/or dust and/or gaseous mixtures coming from processing of metals or other materials comprises two separate units which integrate and act in conjunction with each other: a removable and transportable hood which is movable from a processing area to a standby area, under which the processing is performed which cause fumes and dust,

Abstract: Described is a device for recovering heat and fumes from slag resulting from the steel production cycle which allows the heat emitted by the slag during the cooling to be used without the need to collect the slag in tubs which must then be transported to the cooling surface and tipped in order to discharge the slag; at the same time, this device allows the fumes and consequently the heat and the pollutants which the slag emits during the tipping and the time on the cooling surface to be conveyed and treated.