R Series Grinding Mill



  • Vertical structure takes small area, it is a whole complete system from powder making to the final package.
  • High efficiency centrifugal blower is much better than straight vane blower, the passing rate can reach 99%.
  • The driving device adopts closed gearbox and pulley, drive very stable.
  • The main parts use high quality casting with meticulous craftwork to ensure the durability.
  • The electrical system is centralized control with high automatization.

Brief introduction

Sandmine R series grinding mill is newly promoted, high efficiency, energy-efficient, with world level powder making equipment based on many years grinding mill research experience and customers' using feedback. It is widely used in metallurgy, construction, chemical, mining and other industry for material powder making. It is good choice for grinding gypsum, talcum, calcite, limestone, marble, potash feldspar, barite, dolomite, granite, Kaolin, bentonite, maifanite, bauxite, iron oxide red, iron ore and other non inflammable and explosive mineral with hardness are below 7 grade, moisture less than 6%.


Structure of R series grinding mill


Wearing Parts

Working Principle

Working Principle of R series grinding mill

Firstly, raw material should be crushed by the jaw crusher to the size specified, and then the crushed stuff is elevated into a hopper from which the stuff is loaded, through the vibrating feeder, evenly and continuously into the grinding chamber for powder processing. After this, the ground stuff is carried by the air from the blower into the separator for screening.

The fine powders are blow into the cyclone collector and are poured out through the output-powder valve as the final products and the rough stuff after the screening will be recycled back into the grinding chamber for regrinding. The airflow system of R series grinding mill is closely sealed up and circulated under condition of negative and positive pressure.

Technical Data

Model 3R2714 4R3216 5R4119 6R5213
Max. input (mm) 20 20 20 60
Output size (mm) 0.615-0.044 0.615-0.044 0.615-0.044 0.615-0.044
Capacity (t/h) 0.9-2.8 1.2-4.5 3-7.5 8-16
Rotary speed of main frame (rpm) 155 130 103 82
Roller Quantity (pcs) 3 4 5 6
Diameter (mm) Ø270 Ø 320 Ø410 Ø510
Height (mm) 140 160 190 230
Ring Diameter (mm) 830 970 1270 1670
Height (mm) 140 160 190 230
Overall dimension Length (mm) 8700 9900 10500 21000
Width (mm) 5000 5800 6500 10400
Height (mm) 7819 10580 13530 17000
Weight (t) 11 15.7 25.8 35
Basic data Specification & technical data
3R2714 4R3216 5R4119 6R5213
Motor for main frame Power (kw) 122 37 75 185
Rev (rpm) 1480 1480 1480 1480
Motor for separator Power (kw) 4 5.5 7.5 15
Rev (rpm) 125-1250 125-1250 125-1250 125-1250
Motor for elevator Power (kw) 3 3 11 11
Rev (rpm) 1420 1420 1420 1420
Motor for blower Power (kw) 15 30 55 160
Rev (rpm) 1470 1470 1470 1480
Motor for jaw crusher Type 200x350 250x400 250x400 250x1000
Power (kw) 7.5 15 15 30
Rev (rpm) 970 970 970 970
Electro-Magnetic vibrating feeder Type GZ1F GZ2F GZ2F GZ3F
Power (w) 60 200 200 450

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