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 Products:  Process Engineering » Mechanical Process Engineering » Comminution » CE 245
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CE 245: Ball Mill

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Ball Mill

Product Details


Technical Description
Ball mills are a form of mills with grinding bodies. The drums can be opened at the front and loaded with the material to be milled (limestone is recommended) and the milling balls. The drums are mounted on a drive roller and a loose roller with adjustable spacing between the axles. At low rotation speeds the comminution is effected by the balls rolling over the material (cascade motion). At higher speeds, some balls are lifted up the wall, become detached and drop down onto the material (cataract motion). Above the critical speed, centrifugal forces ensure that no more comminution takes place. These motion states can be observed through the transparent fronts of the drums.
In order to compare the theoretical power demand with the actual, the power consumption of the drive motor is indicated on a digital display. To assess the success of the comminution, an analytical screening machine (CE 264) is recommended.

Learning Objectives / Experiments
- Cascade and cataract motion, critical speed
- Theoretical and actual power demand
- Degree of comminution dependent on milling time, rotation speed,  ball diameter, ball filling, material to be milled

Features
* Comminution with a ball mill
* Observation of the milling process
Specification
[1] Comminution of solids with a ball mill
[2] 2 drums with steel jackets and transparent fronts, 1 steel drum with lifting bars
[3] 1 drive roller with adjustable speed, 1 loose roller
[4] Axle spacings of rollers adjustable to accommodate different drums
[5] Measurement of power consumption
[6] Milling time programmable by timer

Technical Data
2 drums with borosilicate fronts
- D=100mm/200mm, capacity: approx. 1.15L/9L
1 drum with lifting bars
- D=200mm, capacity: approx. 9L
- roller diameter: approx. 50mm
Measuring ranges
- power consumption: 0...200W
- roller speed: 0...300rpm
1 set of milling balls: D=5/10/15mm

Dimensions and Weight
l x w x h : 500 x 400 x 400 mm
Weight : approx. 200 kg

Connections
230V, 50Hz, 1 phase

Scope of Delivery
1 ball mill, 3 milling drums, 1 set of milling balls, 1 set of instructional material

Order Details
083.24500  CE 245  Ball Mill

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
E-Mail:
info@selkagmbh.com   |  Internet: http://www.selkagmbh.com

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