GTS Grinding

MG•P Series

The MG•P classifier mill is a patented model specifically developed for the micronization of sodium salts used in the process for the neutralization of emissions in the atmosphere.

The MG•P classifier mill uses an uncrossed fan which does not require to stop the machine for its cleaning. There is no necessity for the stops, too often delayed for too long and therefore causing malfunctioning, typical of other mills.


The grinding takes place by high peripheral speed impact, with fixed grinders, in a circuit closed by a dynamic classifier.

The adequate modification to the geometry of the grinding chamber allows the mill to operate in light pressure, giving the material hit by the hammers paths which are perpendicular to the impact surface of the grinding armor.

The horizontal rotation axis allows an easy and quick opening of the grinding chamber, and makes the extraction of the mechanical components easier.  


A dynamic classifier, situated on the part above the grinding chamber, allows the continuous control of the final granulometry of the product.

It is made up of a “squirrel cage” wheel which the material must go through in order to leave the classifier mill. The cage gives the particles a centrifugal force opposite to the kinetic force applied by the airflow on the particles.

By operating on the rotation speed it is possible to change the Top-Cut diameter of the product, that is the maximum diameter of the particles allowed to leave the Classifier Mill.

The fineness regulation takes place by varying the classifier speed without interrupting the production, the control software of the electric switchboard PLC automatically changes the classifier turns according to the feeding value.


In best conditions of use and maintenance G.T.S. plants guarantee service availability of  8200 hours/year.

  • The one rotor classifier mill is a compact machine which is supplied already assembled on its own easy-to-anchor bed
  • The feeding dosage takes place by a screw controlled by a process regulator (PID) which changes the material quantity according to the acidity values detected by working on the motor frequency converter.
  • The particular position of the feeding allows the installment of the dosing system on loading cells and its weight control.
  • The speed of the grinding rotor is set according to the processed material and it is constant.
  •  The RPM of the classifier can be changed while the machine is working and the value is shown on the relative panel display.
  • A  high head fan is required, specifically dimensioned for the following three objectives:

- Avoid the machine overheating
- Handle the material from the grinding chamber
- Allow the dynamic selection of powders

  • Working conditions in order to obtain the desired finesse are set and displayed on the operating panel.
  • The innovative use of the uncrossed fan allows the use of more efficient impellers.

  • Uncrossed fan: no cleaning required
  • Further reduced maintenance
  • Limited size and weight
  • Easy installation
  • Change of the product granulometry without stopping the production
  • Possibility to adapt the weight control of the feeding

NOMINAL OUTPUT for Sodium Bicarbonate – (kg/h) min - max
d90 ≤ 35 µm 20 ÷ 200 50 ÷ 600 100 ÷ 1200
d90 ≤ 20 µm 120 300 600



Classifier Mill
Dimensions a mm 1070 1450 1600
Dimensions b mm 900 1000 1200
Dimensions c mm 1250 1410 1790
Micro-dosing feeder
Hopper capacity dm3 80 80 80
Screw power kW 0.75 0.75 0.75
Forced ventilation kW 0.02 0.02 0.02
Blending tool power kW 0.75 0.75 0.75
Dimensions d mm 1100 1120 1430
Dimensions e mm 1050 1050 1150
Dimensions f mm 1100 1200 1430
Total pressure mm/H20 500 600 900
Air volume m3/h 720 1500 3000
Transport piping DN 125 DN 150 DN 200
Standard base dimensions
A x B x C mm 4000x2200x2260 4000x2200x2260 4500x2200x2260
Weight with motors kg 1800 2100 3100
Power supply
Grinder kW 11 18.5 ÷ 22 30 ÷ 37
Classifier kW 2.2 2.2 5.5
Fan kW 5.5 7.5 15