GTS Grinding

MG-B series

The bestseller version of the classifier mill for flue gas treatment and micronization of Sodium Bicarbonate and Trona. 

The grinding in MG-B Series classifier mills takes place by high peripheral impact with fixed grinding tools in a circuit closed by a dynamic classifier.

At the entrance of the grinding chamber, the material to be processed is immediately sucked by the airflow and parts already sufficiently fine are delivered to injection point thereby reducing the workload of the milling.


The peculiar internal geometry of the grinding chamber of G.T.S. classifier mills gives the material hit by the hammers paths which are perpendicular to the impact surface of the armor therefore improving the grinding efficiency.

The horizontal rotation axis allows a quick opening of the grinding chamber, makes the extraction of the mechanical components easier and the servicing operations smoother and faster.


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 and which 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.


It requires a high head fan, whose operation ensures also the handling of the material from the grinding chamber to the conveying line

It is therefore fundamental the control of the air flow and the availability of a fan suitable for the supply of the necessary head to overcome the pressure drop, due to various devices, without compromising the capacity of the airflow.


By combining the design refinement to the building simplicity, MG-B classifier mills stand out for the high level of their performance.

Their reliability and the consistency of their performances assure a nonstop functioning of many weeks and the necessary planned maintenance takes very little time.

In best conditions of use and maintenance they guarantee a 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 varies the material quantity according to the acidity values ensuring extremely quick response times and allowing the containment of the peaks of pollutant emission.
  • The particular position of the feeding allows to install the dosing system on the scale and to carry out 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 display of the electric switchboard.
  • A  high head fan is required, specifically dimensioned for the following three objectives:
    - Avoid the machine overheating
    - Extract the material from the grinding chamber
    - Allow the dynamic classification of powders
  • A bag filter is used for the recovery of the product with the use of a MG100-B classifier mill for high production
  • The parameters to obtain the desired fineness are set and displayed on the operating panel.

  • Reliability
  • Minimum ordinary maintenance
  • Limited size and weight
  • Easy installation and access to components
  • Change of the product granulometry without stopping production
  • Possibility to use feeding weight control

NOMINAL OUTPUT for Sodium Bicarbonate – (kg/h) min - max
MG-B 30MG-B 40MG-B 60MG-B 80MG-B 100 
d90 ≤ 35 µm 20 ÷ 200 50 ÷ 600 100 ÷ 1200 150 ÷ 2200 200 ÷ 4500
d90 ≤ 20 µm 120 300 600 1200 2300



Classifier Mill
Dimensions a mm 1070 1450 1600
Dimensions b mm 1120 1370 1430
Dimensions c mm 1250 1405 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 1230 1245 1390
Dimensions e mm 670 775 815
Dimensions f mm 1450 1615 1545
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 3000x2200x2260 3500x2200x2260 3500x2200x2260
Weight with motors kg 1600 1900 2600
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



Classifier Mill
Dimensions a mm 2100
Dimensions b mm 1500
Dimensions c mm 2280
Micro-dosing feeder
Hopper capacity dm3 85
Screw power kW 0.75
Forced ventilation kW 0.02
Blending tool power kW 0.75
Dimensions d mm 1000
Dimensions e mm 1500
Dimensions f mm 1700
Total pressure mm/H20 900
Air volume m3/h 4500
Transport piping DN 250
Standard base dimensions
A x B x C mm 3460x2100x2400
Weight with motors kg 3350
Power supply
Grinder kW 75
Classifier kW 15
Fan kW 22

MG-B 80


Classifier Mill
Dimensions a mm 2200
Dimensions b mm 2110
Dimensions c mm 2770
Weight with motors kg 3920
Dimensions d mm 2000
Dimensions e mm 1200
Dimensions f mm 2300
Weight with motors kg 800
Total pressure mm/H20 1200
Air volume m3/h 8000
Transport piping DN 300
Dimensions g mm 4180
Dimensions h mm 2680
Dimensions i mm 7950
Filter surface m2 180
Power supply
grinder kW 110 ÷ 132
Classifier kW 15
Fan kW 37

MG-B 100