Tromp Curve Calculation

Rm feed % Pass

fines % Pass

rejects % Pass

Size (um)

1

3.6

4.9

1.9

1

96.4

2

6.1

8.3

3.5

2

93.9

4

11.0

14.7

6.3

4

89.0

8

18.5

25.4

10.1

8

81.5

16

31.2

44.9

14.4

16

68.8

24

39.7

58.8

16.1

24

60.3

32

47.8

71.1

19.1

32

52.2

48

60.6

87.0

28.1

48

39.4

64

67.7

92.6

37.1

64

32.3

96

81.8

100.0

59.5

96

18.2

200

95.1

100.0

89.0

200

4.9

TOTAL:

463.1

607.7

285.1

TOTAL:

636.9

% Residue

% r e c o v e r y t o r e t u r n ( r e je c t )

dim.

Feed %residue

100.0 90.0 80.0 70.0 60.0 50.0

100.0

40.0

Tromp value

90.0 80.0

30.0

70.0

20.0

60.0

10.0

40.0

50.0

0.0

30.0

10Sieve size (um) 100

1 Feed %residue

Fines %residue

1000

20.0 10.0 0.0 1

10Sieve size (um) 10

Rf

Rg

Fines %residue

Rejects %residue

CF

Size avg (um)

Tromp value

95.1

98.1

1.76

0.5

22.9

91.7

96.5

1.85

1.5

29.3

85.3

93.7

1.79

3

25.2

74.6

89.9

1.82

6

22.8

55.1

85.6

1.82

12

15.2

41.2

83.9

1.81

20

8.9

28.9

80.9

1.81

28

16.6

13.0

71.9

1.81

40

31.5

7.4

62.9

1.81

56

56.9

0.0

40.5

1.82

80

71.4

0.0

11.0

1.80

148

98.8

492.3

814.9

1.81

TOTAL:

Tromp value

10 Sieve size (um) 100

1000

Item Circulation factor Cut size(d50) Sharpness (d25/d75) Bypass Sep.load Product load

Units micron % kg/m3 kg/m3

Typical range 2-3 depend on rotor speed and fineness level

0.5-0.6 5-15% 1.8-2.5 0.75

Result 1.81 60 micron 0.38 8.90% 1.7 0.6

Evaluate

Check point for separator test Item Units Circulation factor Cut size(d50)

micron

Sharpness (d25/d75) Bypass Separator load Product load

% kg/m3 kg/m3

Typical range 2-3 depend on rotor speed and fineness level 0.5-0.6 5-15% 1.8-2.5 0.75-0.8