Ferroalloys, ores, granite, marble, limestone, coal, corundum, coke, slags, terra silicea, zirconium dioxide, silica gel, glass, automotive catalyst, aluminum oxide.
|Average product particle size (t=10 min), µm
|Grinding time to obtain a particle size of 90% <1 μm, min
|Maximum initial material grain size, mm
|Loading volume of one bowl, cm3
|Grinding time, min
|Mohs hardness of grinded material, up to
|Number of bowls
|Centrifugal acceleration up to, g
|50 Hz supply voltage, V
|Electric motor power, kW
|Motor shaft speed, rpm
|Overall dimensions (Length x Width x Height), mm
|Bowls/balls material – tool steel
|Bowls/balls hardness, HRC
Due to the planetary-centrifugal nature of the bowl rotation, the grinding balls and particles of the crushed material in the bowl are accelerated up to 30g, which ensures effective sample grinding.
Folding cover for quick access to the bowls.
EFFECTIVE NOISE INSULATION
Soundproofing lining inside the cover and on the entire inner surface of the casing.
The end switch prevents the grinder from starting with cover open.
The toothed drive belt ensures high reliability and low noise.
SIMULTANEOUS GRINDING OF 4 SAMPLES
Simultaneous grinding of four samples up to 45 cm3 each, total sample volume up to 180 cm3.
Possibility of grinding material in four bowls or in two opposite ones;
The built-in timer allows setting the operating time and automatically stopping the mill.
QUALITY WORKING BODIES
The bowls are made of tool steel (5140H). Polishing of the bowl, lid and balls minimizes contamination of the sample with particles from previous samples and facilitates cleaning.
DESCRIPTION OF THE DEVICE
In a planetary ball mill, grinding occurs due to impact destruction during the motion of balls, as well as abrasion — simultaneous compression and shear deformation. The size of the crushed material particles depends on the running time of the mill, the physical properties of the material, the volume of material loaded, as well as the volume of balls loaded. Recommended volume of material loaded in one bowl: 15 — 45 cm3, recommended volume of balls loaded in one bowl: 50 — 130 cm3.
The mill includes: a frame with an electric motor installed in it, a rotor assembly, a belt drive and a cover. The rotor consists of the platform with the carrier attached to it and the baskets with the bowls fixed on them, driven by the belt drive. To restrict access to the internal parts of the mill, as well as to reduce the noise level during operation, housing with sound-insulating linings is installed on the frame.
The cover mounted on the frame is designed to limit access to the rotating parts of the mill and to provide sound insulation. It is equipped with gas lifts to facilitate opening and holding it open. The end switch excludes start-up of the mill with the cover open.
When the electric motor is turned on, the torque is transmitted through the belt drive to a shaft fixed to the platform, giving it rotation around its axis. On the platform, 4 bowls are radially installed, which rotate around their axis in the direction opposite to the rotation of the platform. The balls loaded into the bowl grind material performing complex spatial movements.
The size of the grinding particles can be adjusted in three ways:
The recommended loading volume of one bowl is 15 to 45 cm3.
PBM 1-4 scheme
Scheme of rotation of the platform and bowls
Loading scoops, V= 0,07 L