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Laboratory Rod Mill

Rod Mill
Working Principle

A rotating drum causes friction and attrition between steel rods and ore particles. But note that the term 'rod mill' is also used as a synonym for a slitting mill, which makes rods of iron or other metal. Rod mills are less common than ball mills for grinding minerals.

The rods used in the mill, usually a high-carbon steel, can vary in both the length and the diameter. However, the smaller the rods, the larger is the total surface area and hence, the greater the grinding efficiency.


Technical Specification:

Model

Uite

STRM-160/200

STRM-200/400

STRM-240/300

Cylinder size

mm

160/200

200/240

240/300

Volume

L

4.02

7.5

13.57

Capacity

g

300-800

500-1000

1000-5000

Feed size

mm

2

2

3

Product size

mm

0.074

0.074

0.074

Drum speed

r/min

120

110

96

Power

kw

0.25

0.55

0.55

The grinding medium

Steel bar

diameter

Mm

18

20

15

18

22

15

18

22

The length

Mm

185

225

286

quantity

The root

10

9

17

9

9

33

13

6

weight

Kg

3.55

4.09

4.9

4.2

4.9

12.7

7.48

5.0

Overall dimensions

mm

1052/530/1160

1052/615/1160

1052/615/1160

Weight

kg

91

150

162



Work Index Rod Mill

Work Index Rod Mill
Working Principle

For finding the work index during Rod milling as per invention of F. C. Bond.

As per the standard procedure the feed is crushed to -1/2" and 1250 CC packed in a graduated cylinder are weighed, a representative sample is screen analysed. The weighed sample is ground duly in closed circuit with 100 percent circulating load in a 12" x 24" long tilting Rod Mill with a wave-type lining and revolution counter, running at 46 r.p.m.. The Grinding charge consists of Six 1.25" Dia and two 1.75" Dia steel rods of 21" long and weighing 33,380 Grams.

The rods used in the mill, usually a high-carbon steel, can vary in both the length and the diameter. However, the smaller the rods, the larger is the total surface area and hence, the greater the grinding efficiency.


Power requirement: 4 pole, 10 Amp MCB (3 Phase + neutral with earthing) AC, 50/60Hz, 415 V. Motor: 1.5 HP, 1415 rpm.
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