Mineral Processing 1 Classifier Performance Assignment

SCMET3100 Mineral Processing 1 Classifier Performance Assignment 3
1
Assignment 3
Question 1
A hydrocyclone is classifying material as shown below:
What % of the feed material will be classified?
Question 2
What is circulation ratio and circulating load of a mill if the hydrocyclone underflow is regrind in the
mill. The operation parameters of the hydrocyclone are shown below:
SCMET3100 Mineral Processing 1 Classifier Performance Assignment 3
2
Question 3
The volume flow rate of pump fed to a hydrocyclone was 129 L/min. Its solid content was held at
32% by volume. Samples of the feed, under flow and over flow streams were taken simultaneously,
dried and a size analysis carried out. The results obtained were:
Underflow rate = 30 L/min
Overflow rate = 99 L/min
Particle Size
µm
Feed Mass
%
Underflow Mass
%
Overflow Mass
%

+212
-212+150
-150+106
-106+90
-90+75
-75+63
-63+53
-53+45
-45+34
-34
2.6
8.9
22.1
10.8
7.9
7.8
5.8
4.8
6.5
22.8
6.24
18.77
42.59
13.99
7.26
4.77
2.57
1.22
0.83
1.75
0.0
0.4
2.8
6.8
8.3
9.4
6.0
5.7
10.4
50.23

Draw a partition curve and determine:
a) Cut point (

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