Limestone Micro Powder Grinding Mill with PLC Auto Control System:
The right way to operate the limestone micro powder grinding mill:
Operate the micro powder grinding mill according to the following
Before press the power button, and the voltage indicator should be
at the “380” position.
(1) Start the elevator.
(2) Start the jaw crusher and ensure there is enough raw material
in the hopper.
(3) Start the classifier with the right rotation speed for the
(4) Start the blower and adjust the air valve installed in the pipe
properly for the needed air volume.(sometimes, if there is some
powder in the mill before start; make the fan run for a while. At
the same time, use the hammer to hit the pipes and pulse collector
bottom part to make the powder fall down. These powders should go
into the mill for being reground. After clearance, move the valve
to the right position.)
(5)Start the air compressor. Start the pulse collector controller
and open the air valve. If there is “Bang” “Bang” “Bang” sound in
the pulse collector, it show that the pulse collector is in the
normal working condition. The air compressor working pressure
should be suitable. If much higher, the filtering bags will be
damaged; if much lower, the powder cannot be wiped out from the
filtering bags completely. The pulse collector controller has been
adjusted at the proper position without any adjustment when
working. When abnormal working condition happens, this controller
should be adjusted again.
(6)Start the mill; The time for the mill running without any
material cannot be long (less than 2 minutes) for protecting the
roller and ring. At the same time, there shouldn’t be more material
in the mill for not making the mill run at a higher loading
(7) Start the belt conveyor.
Structure of Micro Powder Grinding Mill:
The micro powder mill has the folllowing components: crusher,
elevator, hopper, feeder, classifier, mill, collector, blower and
electric control cabinet. And delivery and installation of the
whole micro powder grinding mill system is simple and easy to be
completed. As the micro powder grinding mill has been tested in the
factory, so the micro powder grinding mill can run as soon as the
installation is completely. Generally speaking, one engieer from
factory can do installation and test running work. Micro powder grinding mill has the advantages of higher output,
low investment and simple grinding technique. The mechanical and
chemical reaction in the process of grinding is also good to
improve powder activity.
Working Principle of Micro Powder Grinding Mill:
A)The raw material will be lifted into the hopper by elevator after
being crushed by crusher.
B)The raw material will go to the mill by the belt conveyor.
C)The material will be ground into powder between the roller and
D)The qualified powder will go into the pulse collector through the
classifier. And the unqualified powder will fall down to the mill
for being reground.
E) The powder will be collected in the collector and the clean air
will go out through the fan.
Special Features of Calcite Ultrafine Grinding Mill:
1. High efficiency and energy saving: For the same fineness of the
finished powder and same power of the motor, the output of micro
powder grinding mill is double more than that of the jet mill,
agitator mill and ball mill.
2. Longer service life of wearing parts: Grinding roller and
grinding ring are forged with special materials, which greatly
improves the utilization degree. With the same fineness of
materials and finished products, the service life of the wear parts
is 2-5 times longer, generally up to one year. When processing
calcium carbonate and calcite, the service life can reach 2 -5
3. Micro powder grinding mill can be connected the packing machine
seamlessly, which can increase packing efficiency and lower labor
4. Perfect contact surface between rollers and ring: The compatible
surface contact between rollers and rings can increase crushing
force and grinding area and improve crushing efficiency. And this
will be useful for producing ultrafine calcite powder.
5. High safety and reliability: Because there are no rolling
bearings and screws in the grinding chamber, there is no problem
that the bearings and their seals are vulnerable, and there is no
problem that the screws are easy to loose and damage the machine.
6. High product fineness: The fineness of three or four ring
medium-speed ultra-fine grinding products can reach D97≤5μm at one
Technical Data of Calcite Ultrafine Grinding Mill:
|Mesh||21 Rollers||27 Roller|