fjalali
70 posts
TimePosted 28/01/2012 10:08:55
fjalali says

Longitudinal Sieve of Cement Mill


Two compartment white cement mill will Blaine of 4000. Spec and esult of Longitudinal Sieving are in the word attachement.

Please let me know if you can detect any problems and suggest possible solutions.

Kind regards;

FJalali

 





 
 
 
 


 
 
 
 


 
 
 
 


 
 
 
 


 
 
 
 


 
 
 
 


 

Mill Diameter:


 

 

 


 

 

3.2  


 

 

m


 

 

Mill Length:


 

 

 


 

 

10.5  


 

 

m


 

 

First Chamber Effective Diameter:


 

 

 


 

 

3.0  


 

 

m


 

 

First Chamber Effective Length:


 

 

 


 

 

3.0  


 

 

m


 

 

Second Chamber Effective Diameter:


 

 

 


 

 

3.1  


 

 

m


 

 

Second Chamber Effective Length:


 

 

 


 

 

7.5  


 

 

m


 



 



Result of Longitudinal Sieving is:





 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
 
 
 
 
 
 
 
 
 


 

Screen Size


 

 

mm


 

 

Meter 0.5


 

 

Meter 1.5


 

 

Meter 2.5


 

 

Meter 0.5


 

 

Meter 1.5


 

 

Meter 2.5


 

 

Meter 3.5


 

 

Meter 4.5


 

 

Meter 5.5


 

 

Meter 6.5


 

 

 1/2"


 

 

12.7


 

 

8.6


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

 3/8"


 

 

9.51


 

 

14.4


 

 

3.9


 

 

6.8


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

5/16


 

 

8


 

 

15.2


 

 

4.5


 

 

6.8


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

1/4


 

 

6.3


 

 

18.2


 

 

4.7


 

 

6.9


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

#4


 

 

4.75


 

 

23


 

 

5.1


 

 

7


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

#8


 

 

2.36


 

 

30.5


 

 

7.4


 

 

7.2


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

#16


 

 

1.18


 

 

36.5


 

 

13.5


 

 

8.4


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

#20


 

 

850


 

 

38.6


 

 

17.5


 

 

9.9


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

0


 

 

#30


 

 

600


 

 

41.6


 

 

25.5


 

 

15.1


 

 

3.8


 

 

2.5


 

 

1.2


 

 

1


 

 

0


 

 

0


 

 

0


 

 

#70


 

 

212


 

 

46.7


 

 

38.5


 

 

29.2


 

 

11.9


 

 

9.6


 

 

5.7


 

 

4.5


 

 

2.1


 

 

1.1


 

 

1.6


 

 

#170


 

 

90


 

 

55.8


 

 

51.6


 

 

43.9


 

 

28.5


 

 

26.2


 

 

21.4


 

 

17.3


 

 

13.7


 

 

8.8


 

 

9.5


 

 

#200


 

 

75


 

 

58


 

 

53.8


 

 

47.5


 

 

35.0


 

 

29.6


 

 

24.4


 

 

19.4


 

 

15.6


 

 

11.3


 

 

11.3


 

 

#230


 

 

63


 

 

63.6


 

 

60.5


 

 

53.6


 

 

41.4


 

 

35.6


 

 

31.9


 

 

26.6


 

 

23.2


 

 

19.0


 

 

17.6


 

 

#270


 

 

53


 

 

66.8


 

 

62.7


 

 

55.7


 

 

43.6


 

 

39.3


 

 

35.3


 

 

29.8


 

 

25.3


 

 

21.6


 

 

21.5


 

 

#325


 

 

45


 

 

75.3


 

 

71.3


 

 

65.5


 

 

53.6


 

 

51.2


 

 

45.4


 

 

43.3


 

 

37.5


 

 

32.6


 

 

35.1


 

 

#400


 

 

38


 

 

80.2


 

 

78


 

 

71.3


 

 

62.5


 

 

58.7


 

 

53.9


 

 

51.5


 

 

46.6


 

 

44.9


 

 

43.4


 



 



 






 
 
 
 
 
 
 
 
 
 
 
 








Please let me know if you can detect any problems and
possible solutions.

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emadissa
23 posts
TimePosted 29/01/2012 06:04:10
emadissa says

re Longitudinal Sieve of Cement Mill

Very good fineness development

However, central and discharging diaphragms might be slightly blocked

Reply

fjalali
70 posts
TimePosted 07/02/2012 09:53:09
fjalali says

re Longitudinal Sieve of Cement Mill

Thanks.

Anyone else has any comments. What about the end of second chamber?

Thx

Reply

fjalali
70 posts
TimePosted 27/02/2012 12:48:32
fjalali says

re Longitudinal Sieve of Cement Mill

Please see the new longitudinal sieve analysis for the same
finish mill and give me your comments.

At intermediate diaphragm residue on mesh#8 is 0.9% so chamber
one is over grinding the material. Also since the second chamber inlet material
is too fine therefore we can use max ball size of 30 mm in second chamber. In later
stages based on new longitudinal sieve analysis we can reduce the filling
degree of first chamber and increase the second chamber.

I appreciate your comments and thoughts.



 



 

Attached files

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