Reference no: EM132505672
Mineral Processing
Problem 1
A hydrocyclone is classifying material as shown below:
What % of the feed material will be classified?
Problem 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:
Problem 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(d50)
b) Watersplit
c) Corrected cut point(d50°c)
d) Imperfection.
Problem 4
A hydrocyclone classifier is fed with quartz slurry at the rate of 20.8 t/h from a grinding mill. The underflow is recirculated. The screen analysis of each stream were determined with the following results:
|
Size,
µm
|
Feed Mass,
%
|
Overflow Mass,
%
|
Underflow Mass,
%
|
|
+300
-300+250
-250+150
-150+106
-106+75
-75
|
25
15.3
11.6
12.8
9.6
25.7
|
0
0
0.2
5.4
18.3
76.1
|
33.2
20.3
15.4
15.2
6.7
9.2
|
Determine:
a) The circulationratio
b) The efficiency of thecyclone.