The efficiency of roasting black dross can be improved by pre-processing the black dross before roasting. Black dross can be crushed and reconstituted into pellets having internal channels. The internal channels can be filled with additives designed to fully oxidize during a dross roasting process, enabling the internal channels to be open and gas to flow therethrough during a dross roasting process. The crushed black dross can be crushed to pieces below 10 mm and screened for larger pieces prior to pelletizing to ensure consistent pellets. Optionally, an eddy current separator can remove some metallic aluminum from the crushed black dross prior to pelletizing.

An aluminum can crushing device is provided to encourage recycling of drink and other cans. The can crushing device employing a handle engaged with a housing, provides significant mechanical advantage to a user during the crushing process. A tilting base automatically ejects crushed cans from an internal cavity into a removably engaged bag.

A method for recycling the contents of aerosol cans, the contents including a liquid. The method includes applying a reduced pressure to at least the liquid, thereby removing a gaseous fraction from the liquid, leaving a liquid fraction, the gaseous fraction containing at least gaseous matter previously dissolved in the liquid fraction, discharging the gaseous fraction separate from the liquid fraction, cooling the gaseous fraction, thereby condensing low-boilers present in the gaseous fraction, and discharging the condensate separately from the remainder of the gaseous fraction. A system for recycling the contents of aerosol cans.

A dual roller (1) for compressing and/or puncture plastic or metal items comprising a first roller (3) and a second roller (4) having parallel axes (5a,b) rotatable mounted in a housing (6) and a drive mechanism (7) for rotating the rollers (3,4) synchronously opposite one another. The outer surfaces (28) of each roller (3,4) comprise an assembly of alternating protruding elements (8) extending from the surface (28). Spacers (9) are arranged so the protruding elements (8) of one roller extend radially into the spacers (9) between adjacent protruding elements (8) on the opposite roller in an alternating manner. The protruding elements (8) are longitudinal rails (11) arranged parallel with the axes (5a,b) of the rollers (3,4, attached to the circumferential surface (28) of the rollers (3,4).

A container grinding system having a box equipped with a closing device coupled to a first safety device, the box having a container introduction opening arranged in a top part of the box and capable of being closed by the closing device, the grinding system having a grinder having at least one grinding shaft for shredding chipped containers, a filtering basket recovering the ground material from the grinding of containers, and a set of rinse nozzles, the grinding system being configured so that following the introduction of a container into the box for grinding the same, the first safety device inhibits the operation of the grinder as long as the closing device does not ensure closing of the box.