(19)
(11) EP 0 382 045 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.05.1991 Bulletin 1991/20

(43) Date of publication A2:
16.08.1990 Bulletin 1990/33

(21) Application number: 90101756.6

(22) Date of filing: 30.01.1990
(51) International Patent Classification (IPC)5: F23H 17/12
(84) Designated Contracting States:
DE ES FR GB IT

(30) Priority: 08.02.1989 IT 1934689

(71) Applicant: OFFICINE METALMECCANICHE NOVA S.P.A.
I-20054 Nova Milanese, Milan (IT)

(72) Inventor:
  • Crippa, Livio
    I-20099 Sesto S. Giovanni Milan (IT)

(74) Representative: Giambrocono, Alfonso, Dr. Ing. et al
Ing. A. Giambrocono & C. S.r.l. Via Rosolino Pilo 19/B
20129 Milano
20129 Milano (IT)


(56) References cited: : 
   
       


    (54) Grate bar with protection element of ceramic material or equivalent material of high heat and wear resistance


    (57) The grate bar used particularly in the grates of incineration furnaces, which are normally formed with a bed consisting of rows of grate bars supported by two frames driven with reciprocating motion to feed the fuel along the grates.
    The grate bars are subject to considerable erosion due to their rubbing against each other and against the overlying material to be burned, and are also obviously exposed to the flames so that they are subject to rapid oxidation and wear.
    To reduce said wear and oxidation phenomena, the grate bar according to the invention consists of a lower element (5) with a load-bearing function, constructed of steel or cast iron without particular heat or abrasion resistance characteristics, and an upper element (6) formed of ceramic material or another equivalent material.






    Search report