Process and reactor for removing the volatile components of the fine fraction coming from the crushing of vehicles and iron-containing scraps
AssigneesCentro Sviluppo Materiali S.p.A., Centro Rottami S.r.l.
InventorsGiuseppe Faslivi, Medardo Pinti, Fabio Salvati, Leopoldo Del Prete
Life of this patent
Estimating the term…
Abstract
A simple and economical process for rendering the fine fraction, from crushing of vehicles and iron scraps, capable of being used in the manufacture of bituminous or cement-based conglomerates as partial substitutes of quarry inerts. Subject of the invention is also a reactor suitable for carrying out the above process. FIG. 1 shows an embodiment of the reactor.
Claims12
A process for removing the volatile components of the fine fraction coming from the separation of the residue from the crushing of vehicles and iron-containing scraps, comprising the following steps, carried out in a rotary-drum reactor having two cylindrical chambers with overlapping bases, initially preheated at temperatures comprised between 500 and 800° C. and 400 and 600° C., respectively:
- feeding said fine fraction into the first chamber;
- injecting and distributing into the first chamber a combustion supporter, by at least two radial nozzles arranged on a pipe coaxial to the first chamber, with partial combustion of the fine fraction, consequent partial removal of the volatile substances present therein and holding of the temperature of 500-800° C.;
- transferring the hot fine fraction, partially stripped of the volatile substances present therein, from the first to the second chamber by a duct apt to foster the attainment in the first chamber of the stay times needed for partial volatilization;
- feeding into the second chamber other fine fraction, which mixes to that already treated in the first chamber;
- injecting and distributing into the second chamber other combustion supporter, by at least two nozzles arranged on a pipe coaxial to the second chamber, with total removal of the volatile substances present in the fine fraction to be treated and holding of the temperature of 400-600° C.;
- collecting the fine fraction free from the volatile components.
A reactor suitable for removing the volatile components of the fine fraction coming from the separation of the residue from the crushing of vehicles and iron-containing scraps, comprising the following parts:
- a first chamber substantially cylindrical and rotating about its own axis, containing a burner thereinside and equipped with means for feeding the fine fraction and means for injecting the combustion supporter from a pipe coaxial thereto;
- a second chamber, substantially cylindrical and rotating about its own axis, and equipped with means for feeding the fine fraction and means for injecting the combustion supporter from a pipe coaxial thereto,
- the first chamber and the second chamber being equipped with means for mixing the fine fraction and the combustion supporter, and being connected therebetween by a duct.
Dependencies are inferred from the claim text.