Maliy pr. V. O., 62/2, liter A, St. Petersburg, Russian Federation, 199178

Disc grinders

Disc grinders are designed for comminution of samples of bulk materials to a fine-grained state.

In disc grinders, comminution occurs by means of abrasion – simultaneous compressive and shear strain of material particles between fixed and moving discs.

The grain size of the comminuted product is regulated by the gaps between the discs (openings) and the physical properties of the material.

The Disc grinder DG 65 is designed for comminution of small samples weighing up to 1.0 kg for analytical studies with strict requirements relating to sample purity: the sample is not contaminated by working parts of the grinder.

The Disc grinder DG 175М is a tabletop model of the DG 175. In addition to the reduced overall dimensions of the grinder, the method for adjusting the gap between the discs has been changed. This makes it possible to perform the adjustment while the electric motor is operating.

The Disc grinder DG 200 is a more powerful model of the laboratory-class equipment. It can be used for comminution of small samples weighing up to 3 kg, as well as for continuous comminution, by outfitting it with 1.8L or 10L receiving containers, as well as Feeders VF 1 or VF 2.

The Disc grinder DG 250 is high-power equipment designed for busy laboratories or small production facilities.

Characteristics

DG  65

DG  175М

DG 200

DG  250

Disc diameter (mm)

65

175

200

250

Width, Area of parallel zone of discs

5 mm / 10 cm2

29 mm / 130 cm2

42 mm / 200 cm2

62 mm / 370 cm2

Maximum initial particle size (mm)*

3

4

4

4

Average crushed product particle size at minimum aperture (mm)

0,05

0,071

0,1

0,1

Maximum hardness of comminuted material (Mohs units)

8 units

8 units**

8 units**

7 units

Maximum output (kg/hour)

5

50

150

300

Electric motor power (kW)

0,37

2,2

2,2

4

50 Hz supply voltage (V)

220

380

380

380

Overall dimensions (Length x Width x Height) (mm)

350х225х300

625х375х485

630х410х925

930х410х935

Weight (kg)

21

83

135

160

Disc material

SiC

GJN-HV600(XCr14) / UNS J91109 with tungsten carbide inserts

GJN-HV600(XCr14) / UNS J91109

The maximum allowable size of the initial material depends on its physical properties.

**If discs with tungsten carbide inserts are used.

Advantages of VIBROTECHNIK Disc grinders:

  • Use of discs with two types of working surface: wedge-shaped (for preliminary comminution) and flat (for regrinding);
  • Positioning of discs strictly parallel to one another by adjusting the position of the fixed disc;
  • Discs are made of wear-resistant materials: carborundum, high-strength iron or manganese steel;
  • Increased disc service life (DG 175М, DG 200 and DG 250) due to:
    • Ability to rotate the discs 180 degrees;
    • Interchangeable moving and fixed discs;
    • Reversible operation.
  • Safe operation of the grinders is ensured by:
    • Equipping the grinders with control panels;
    • Limit microswitches that prevent grinders from being started with the covers or grinding chambers open.
  • Openings for monitoring the gap between the discs are provided in DG 175М, DG 200 and DG 250 stationary chambers.

Applications: ferroalloys, ore, granite, marble, limestone, coal, coke, slag, diatomaceous earth, silica gel, automotive catalyst, glass, salt.

Industries: mining, metallurgy, construction, chemical.