Refining Mills Model 520 - Pennati Costruzioni Meccaniche S.r.l.

The model 520 peg type pulverizer mill is used to fine-grind various materials and minerals of soft or semi-hard nature (Mohs hardness from 2 to 4).
It grinds by impact at high speed, achieving medium throughputs (up to 5 tonnes per hour); product size is achieved by a perforated plate screen on the outside of the rotor.
Crushed product is discharged by gravity.
Grinding occurs in various stages: product entering is impacted against various rows of rotating pegs, meshing with the same number of rows of fixed pegs.
The technical features and the throughputs achieved make the refining mill particularly suited to refining plaster of Paris to the product size required by market demands.
  • Features

    Excellent for pulverising and refining soft and semi-hard dry materials with extreme finenesses.

    • CASE AND STAND: high-resistance cast iron.
    • SHAFT: made of high-grade steel, on monobloc supports with ball bearings - excellent protection against dust.
    • ROTOR: made of two separate parts - special tough and wear-resistant cast steel. External milling teeth - internal grinding teeth.
    • GRINDING STATORS: fixed on to the door in independent concentric rings.
    • GRATE: may be removed and replaced very easily - made of bored steel plate with appropriate bores and thicknesses - mounted on a stiffening frame.
    • VIBRATING SCREEN: sieves the material fed in to eliminate any foreign bodies that may cause damage to the mill, such as ferrous parts.
  • References

    Model Year Raw Material Capacity MTPH Installed Power kW Ground grain size
    520/60 2010 Quick lime 3 37 d95 < 150 um
    520/100 2005 Burnt gypsum 1x5 75 d95 < 88 um
    520/60 2005 Bachelite 1,5 30 d95 < 150 um
    520/100 2002 Burnt gypsum 1x5 75 d95 < 88 um
    520/60 2002 Burnt gypsum 2x7 2x37 d95 < 88 um
    520/60 2002 Paraphormaldeyde 3 30 d95 < 150 um
    520/100 2001 Burnt gypsum 3x5 3x75 d95 < 88 um
    520/100 2000 Burnt gypsum 2x6 2x75 d95 < 88 um
    520/60 1999 Burnt gypsum 2 22 d95 < 88 um
    520/100 1998 Linoleum residuals 1 75 -------
    520/25 1998 Pigment additives 0,1 5,5 -------
    520/25 1998 Pigment additives 1 75 -------
    520/100 1997 Calcium carbonate 3 55 d95 < 88 um
    520/60 1997 Burnt gypsum 2 22 d95 < 88 um
    520/30 1995 Granular filter residuals 0,5 11 -------
    520/50 1995 Glass residuals 1,5 30 -------
    520/50 1995 Granular filter residuals 1 22 -------
    520/30 1994 Pigment additives 0,2 7,5 -------
    520/60 1994 Various additives 1 22 d95 < 88 um
    520/30 1992 Phtalic anydryde 0,25 7,5 -------
    520/60 1992 Various inert granulars 2 18,5 -------
    520/60 1992 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1992 Burnt gypsum 2 22 d95 < 120 um
    520/100 1991 Burnt gypsum 4 37 d95 < 88 um
    520/100 1991 Burnt gypsum 4 37 d95 < 120 um
    520/60 1991 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1991 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1991 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1991 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1991 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1990 Crude gypsum 2 22 d92 < 100 um
    520/60 1990 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1990 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1990 Burnt gypsum 2 18,5 d95 < 88 um
    520/100 1989 Burnt gypsum 4 37 d95 < 88 um
    520/60 1989 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1989 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1989 Burnt gypsum 2 22 d95 < 88 um
    520/60 1989 Burnt gypsum 2 22 d95 < 88 um
    520/60 1989 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1989 Burnt gypsum 2 18,5 d95 < 88 um
    520/100 1988 Burnt gypsum 4 37 d95 < 88 um
    520/60 1988 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1988 Burnt gypsum 2 18,5 d95 < 88 um
    520/100 1986 Burnt gypsum 4 37 d95 < 88 um
    520/60 1986 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1986 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1986 Burnt gypsum 2 18,5 d95 < 88 um
    520/100 1985 Burnt gypsum 4 37 d95 < 88 um
    520/100 1985 Burnt gypsum 4 37 d95 < 88 um
    520/60 1985 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1985 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1985 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1984 Burnt gypsum 2 18,5 d95 < 88 um
    520/100 1983 Burnt gypsum 4 37 d95 < 88 um
    520/60 1983 Burnt gypsum 2 15 d95 < 88 um
    520/60 1981 Pigment additives 0,8 18,5 d90 < 120 um
    520/60 1980 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1980 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1979 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1978 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1978 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1977 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1977 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1977 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1976 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1975 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1975 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1975 Burnt gypsum 2 18,5 d95 < 88 um
    520/100 1974 Burnt gypsum 4 37 d95 < 88 um
    520/100 1973 Burnt gypsum 4 37 d95 < 88 um
    520/60 1972 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1972 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1971 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1971 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1969 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1967 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1966 Crude gypsum 1 18,5 d95 < 88 um
    520/60 1966 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1966 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1964 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1963 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1963 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1962 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1962 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1962 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1961 Burnt gypsum 2 18,5 d95 < 88 um
    520/60 1960 Burnt gypsum 1,5 15 d95 < 88 um
    520/60 1960 Burnt gypsum 1,5 15 d95 < 88 um
    520/60 1960 Burnt gypsum 1,5 15 d95 < 88 um
    520/60 1960 Burnt gypsum 1,5 15 d95 < 88 um
    520/60 1959 Burnt gypsum 1,5 15 d95 < 88 um
    520/60 1958 Burnt gypsum 1,5 15 d95 < 88 um
    520/60 1958 Burnt gypsum 1,5 15 d95 < 88 um
    520/60 1958 Burnt gypsum 1,5 15 d95 < 88 um

    Back to milling and grinding machines