Hardgrove Grinidibility Machine
Technical Specifications for Hardgrove Grinidibility Machine
The HGI Machine for coal/coke as per
IS: 4433-1979.
The machine includes
stationery grinding bowl of hardened manganese steel with a horizontal track in which run eight
steel balls each 24.000±0.003 mm diameter. The balls
shall be driven by an upper grinding ring rotated at 19 to 21 re./min. the
upper grinding ring of similar material to the bowl is connected to a spindle
and shall be driven by an electric motor through reduction gears. Weights shall
be added to the spindle so that the total vertical force on basis due to the
top ring, gear, weights and spindle is 284±2N, closely equivalent to a total
mass of 29±0.2 Kg. The machine shall befitted with a digital revolution counter
and an automatic device for stopping machine after 60±0.25 revolutions.
Reduction Gear made of GEMICON.
Motor
make Kirloskar/Crompton
Motor
: 1 HP , three phase, 440 volt,
50 cycles, AC.
Sieves
: SS wire net brass sieves
200
mm dia of 1.18 mm, 600 micron, and
75 micron with cover & receiver, about
200 mm diameter.
Hardgrove Grinidibility
Machine, for coal/coke as per IS: 4433-1979. The machine consists of a stationary grinding bowl of hardened
iron or steel, with a horizontal track in which run eight steel balls, each
25,400 +/- 0.003mm. diameter. The balls shall be driven by an upper grinding
ring rotated at 19 to 21 revolution per minutes. The upper grinding ring of
similar material to the bowl, is connected to as spindle and shall be driven by an
electric motor through reduction gears. Weights shall be added to the spindle
so that the total vertical force on the balls due to the top ring, gear,
weights and spindle is 284 +/- 2 N. for example, closely equivalent to the
total mass of 29 +/- 0.2 kg. The machine shall be fitted with electric
automatic predetermine revolution counter for stopping the machine after 60+/-
0.25 revolution.
Suitable operation on 230 volts
single phase, 50 cycles A.C. supply.