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Date : 19 N0V 2014
Derrick Screen Feed
Total wet mass = 3.97kg
Total dry mass = 1.54kg
Part A
M1 = 0.81kg
M2 = 410.6g
M3 = 205g
M4 =56.2g (before washing -38µm)
M6= 31.0g (after washing -38µm)
Table 1:
particle size(µm)
mass (g) mass fraction
cumulative % passing
2360.00 0.00 0.00 100.001700.00 0.00 0.00 100.001180.00 0.00 0.00 100.00
850.00 0.00 0.00 100.00600.00 0.10 0.10 99.90425.00 0.30 0.30 99.60300.00 0.80 0.80 98.80212.00 1.50 1.50 97.30150.00 5.60 5.60 91.70106.00 11.90 11.90 79.80
75.00 16.70 16.70 63.1053.00 11.50 11.50 51.6038.00 7.30 7.30 44.30
0.00 44.30 44.30 0.00total 100.00 100.00
Figure1. 2: Mass fraction Vs Aperture size graph
0.00 500.00 1000.00 1500.00 2000.00 2500.000.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
mass fraction vs aperture size
mass fraction
Aperture size
mas
s %
0.00 500.00 1000.00 1500.00 2000.00 2500.000.00
20.00
40.00
60.00
80.00
100.00
120.00
cumulative vs aperture size
mass fraction
Aperture size
mas
s %
Part B
M1 =0.81kg
M2 = 369.3g
M3 = 184.4g
M4 = 92g (before washing -38µm)
M6 = 51.8 (after washing -38µm)
particle size(µm)
mass (g) mass fraction
cumulative % passing
2360.00 0.00 0.00 100.001700.00 0.00 0.00 100.001180.00 0.00 0.00 100.00
850.00 0.00 0.00 100.00600.00 0.00 0.00 100.00425.00 0.30 0.33 99.67300.00 0.70 0.76 98.91212.00 1.40 1.53 97.38150.00 5.10 5.57 91.80106.00 11.60 12.68 79.13
75.00 14.20 15.52 63.6153.00 11.10 12.13 51.4838.00 6.90 7.54 43.94
0.00 40.21 43.94 0.00total 91.51 100.00
0.00 500.00 1000.00 1500.00 2000.00 2500.000
5
10
15
20
25
30
35
40
mass vs aperture size
mass fraction
Aperture size
mas
s %
0.00 500.00 1000.00 1500.00 2000.00 2500.000.00
20.00
40.00
60.00
80.00
100.00
120.00
cumulative %aperture size
mass fraction
Aperture size
cum
ulati
ve %
A Calculations
1. % error
% error=(M 6 )−(drymassafter screening)
M 6
= (56.2−55.8 )56.2
×100
= 0.71%
2. M38
M 38= (101−56.2 )101
×100
= 44.36%
3. Mass(in grams) of the washed -38µm, X
%= xmt+x
0.4436= x
55.8+x Solving X= 44.20g Therefore Total Mass in grams= 44.20 + 55.8 = 100g
B Calculations
1. % error
% error=(M 6 )−(dry massafter screening)
M 6
= (51.8−51.4 )
51,8×100
= 0.77%
2. M38
M 38= (92−51.8 )92
×100
= 43.70%
3. Mass(in grams) of the washed -38µm, X
%= xmt+x
0.4370= x
51.4+x Solving X= 40.11g
Therefore Total Mass in grams= 40.11 + 51.4 = 91.51g
1. Derrick Screen Oversize
Total wet mass = 4.59kg
Total dry mass = 2.64kg
Part A
M1 = 1.37kg
M2 = 683.8g
M3 = 341.6g
M4 = 170g
M5 = 84.8g (before washing -38µm)
M6 = 71.3g (after washing -38µm)
Table 3
particle size(µm)
mass (g) mass fraction
cumulative % passing
2360.00 0.00 0.00 100.001700.00 0.00 0.00 100.001180.00 0.00 0.00 100.00
850.00 0.00 0.00 100.00
600.00 0.20 0.24 99.76425.00 0.50 0.60 99.16300.00 2.40 2.88 96.28212.00 7.80 9.35 86.93150.00 29.00 34.78 52.15106.00 19.00 22.78 29.37
75.00 6.60 7.91 21.4553.00 2.90 3.48 17.9838.00 1.70 2.04 15.94
0.00 13.29 15.94 0.00total 83.39 100.00
Figure 3.2: Mass fraction vs Aperture size
0.00 500.00 1000.00 1500.00 2000.00 2500.000
5
10
15
20
25
30
35
40
mass % vs aperture size
mass fraction
Aperture size
mas
s %
Figure 3.1: Cumulative Vs Aperture size graph
0.00 500.00 1000.00 1500.00 2000.00 2500.000.00
20.00
40.00
60.00
80.00
100.00
120.00
cumulative vs aperture size
mass fraction
Aperture size
mas
s %
Part B
M1 = 1.27kgM2 = 638.6gM3 = 322.2gM4 = 162.6gM5 = 80.2g (before washing -38µm)M6 = 66.8g (after washing -38µm)
Table 4:
particle size(µm)
mass (g) mass fraction
cumulative % passing
2360.00 0.00 0.00 100.001700.00 0.00 0.00 100.001180.00 0.00 0.00 100.00
850.00 0.00 0.00 100.00600.00 0.40 0.50 99.50425.00 0.30 0.38 99.12300.00 2.00 2.51 96.61212.00 6.60 8.30 88.31150.00 21.00 26.41 61.90106.00 21.50 27.03 34.87
75.00 8.60 10.81 24.0553.00 3.60 4.53 19.5338.00 2.20 2.77 16.76
0.00 13.33 16.76 0.00Total 79.53 100.00
Figure 4.2: Mass fraction Vs Aperture size graph
0.00 500.00 1000.00 1500.00 2000.00 2500.000
5
10
15
20
25
30
35
40
mass % vs aperture size
mass fraction
Aperture size
mas
s %
Figure 4.1: Cumulative Vs Aperture size graph
0.00 500.00 1000.00 1500.00 2000.00 2500.000.00
20.00
40.00
60.00
80.00
100.00
120.00
cumulative % vs aperture size
mass fraction
Aperture size
cum
ulati
ve %
A Calculations
1. % error
% error=(M 6 )−(drymassafter screening)
M 6
= (71.3−70.1 )71.3
×100
= 1.68%
2. M38
M 38= (84.8−71.3 )84.8
×100
= 15.92%
3. Mass(in grams) of the washed -38µm, X
%= xmt+x
0.1592= x
70.1+x Solving X= 13.29g Therefore Total Mass in grams= 13.29 + 70.1= 83.39g
B Calculation
1. % error
% error=(M 6 )−(dry massafter screening)
M 6
= (66.8−66.2 )66.8
×100
= 0.9%
2. M38
M 38= (80.2−66.8 )80.2
×100
= 16.71%
3. Mass(in grams) of the washed -38µm, X
%= xmt+x
0.1671= x
66.2+ x Solving X= 13.33g Therefore Total Mass in grams= 13,33 + 66.2 = 79.53g
