Apparatus Required:-
- Laboratory Hammer-Mill
- Feed Sample
- Meter-rod
Hammer
Mill:-
Hammer
mills are characterised by their considerable grain size reduction
ratio.
They
are suitable for handling clay of any kind, ceramic mixtures with a
high content of aggregates and raw materials with a low to medium
hardness.
These
mills are composed of a thick sheet metal casing, housing on the
inside a set of circular and lateral armours coated with wearproof
material; a rotor carrying the grinding hammers that are made of a
special long-life alloy; a lump crushing hammer unit and special
steel sizing grids.
In
a hammer mill, swinging hammerheads are attached to a rotor that
rotates at high speed inside a hardened casing. The principle is
illustrated in Figure.
The
material is crushed and pulverized between the hammers and the casing
and remains in the mill until it is fine enough to pass through a
screen which forms the bottom of the casing. Both brittle and fibrous
materials can be handled in hammer mills, though with fibrous
material, projecting sections on the casing may be used to give a
cutting action.
Both
hammering and rolling can achieve the desired result of achieving
adequately ground ingredients, but other factors also need to be
looked at before choosing the suitable method to grind. Excessive
size reduction can lead to wasted electrical energy, and unnecessary
wear on mechanical equipment.
General
Design:-
The
major components of these hammer mills, shown in the picture,
include: - a delivery device is used to introduce the material to be
ground into the path of the hammers. A rotor comprised of a series of
machined disks mounted on the horizontal shaft performs this task. -
free-swinging hammers that are suspended from rods running parallel
to the shaft and through the rotor disks. The hammers carry out the
function of smashing the ingredients in order to reduce their
particle size. -a perforated screen and either gravity- or
air-assisted removal of ground product. Acts to screen the particle
size of the hammer mill to ensure particles meet a specified maximum
mesh size.
Procedure:-
Identify each part of the hammer. Draw a sketch and lebel each part on it.
Switch on the machine and study the function of each part of the machine. Note the r.p.m of the machine.
Examine the feed for its size-range and recover the average maximum size in it.
Feed the material slowly.
Switch off the machine and recover the product and weight it.
Transfer the product to a set of sieve and sieve for 20 minutes.
Observations:-
Machine Details which is shown above:-
Premium Pulman Pvt Ltd is specially established for the manufacture of size reduction equipment (Pulveriser). This is off chute of the Parent company M/s. Precision Products. AHMEDABAD (INDIA). Hammer Mill, Industrial Pulveriser, Micro Pulveriser, Air Swept Mill, Poultry Feed Plant, Salt Refining Plant, Spices Plant, Sugar Pulverisers, Pin Mill
ReplyDeleteNice post, thanks for sharing with us.
ReplyDeleteHammer Mill Grinder Manufacturers' machines are available at EcoStan in Ludhiana, Punjab, India. This Hammer Grinder machine is used to reduce the size of big materials such as seeds, timber, and forest trash into little pieces.