sdm screen sizing.xls

8/18/2019 SDM Screen Sizing.xls

1/17

To use enter the required data in the highlighted cells

No error checking is done, impossible input will give impossible output.

Minimum required information is material denisty (#cu. !t", feed rate (dry solids" (thr", desired total cyclone

capacity (gmin", cyclone feed pressure (psig" at inlet, vorte finder pipe wall thickness (inch",

the number of cyclones, and the cone angle

!or efficiency a si$e distribution in microns and % weight retained in each si$e is required.


2/17

Vibrating Screen Design & AnalysisCopyright 2010, M. C. (Mike) Albrecht, .!. (A")

#eneral

&ocation My 'lant

Number equired one

)creen Type *ori$ontal vibrating

+nits +)

rocess Data

!eed Material )and -ravel Material !actor .//

0ensity #cu ft 1.2 Number of 0ecks 2

!eed ate (dry solids" thr 2/./Moisture % wt 2./

Screening Con$itions

0eck 0eck 3

0esired )eparation inches 4.// 0esired )eparation inches /.2/

5et or 0ry (50" 5 5et or 0ry (50" 5

0esired 6fficiency % 7/% 0esired 6fficiency % 7/%

0eck 1 0eck 2

0esired )eparation inches 1.// 0esired )eparation inches /.48

5et or 0ry (50" 5 5et or 0ry (50" 5


0eck 4 0eck 9

0esired )eparation inches .// 0esired )eparation inches /.2/

5et or 0ry (50" 5 5et or 0ry (50" 5


%ee$ Sie Distrib'tion

)i$e % % :um % :um(inches" etained 'ass etained

3.// /./% 7/./% /./%

4.// 2./% ;2./% 12./%

1.// 1/./% 22./% 32./%

.// 1/./% 42./% 92./%

/.2/ 2./% 1/./% 8/./%

/.12 /./% /./% 7/./%

/.// /./% /./% //./%

/./% //./%

/./% //./%

/./% //./%

/./% //./%

/./% //./%

Notes


3/17


#eneral

&ocation My 'lant

Number equired one


+nits +) DECK 1rocess Data

!eed Material )and -ravel Material !actor ./


!eed ate (dry solids" thr 2/./

Moisture % wt 2./

Screening Con$itions0eck >ase :apacity thrft?1 9.21

0esired )eparation inches 4.// @Asi$e % 12./%

5et or 0ry (50" 5 @Asi$e !act/r /.77/

0esired 6fficiency % 7/% *alfsi$e % 42./%

*alsi$e !actor /.8734

0eck :apacity thrft?1 2./2 0eck !actor .////

0ensity !actor .12/

@ver )i$e thr 18.2/ 5et !actoror .////

% wt 7./% @pen area!actor ./4;

+ndersi$e thr 1.2/ )creen 6fficiency !actor .12

% wt 8./% )creen )urface !actor .////


)i$e % % :um % :um

(inches" etained 'ass etained

3.// /% 7/./% /./%

4.// 2% ;2./% 12./%

1.// 1/% 22./% 32./%

.// 1/% 42./% 92./%

/.2/ 2% 1/./% 8/./%

/.12 /% /./% 7/./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

Notes


4/17


#eneral

&ocation My 'lant

Number equired one


+nits +) DECK 2 rocess Data


0ensity #cu ft 1.2 Number of 0ecks 2!eed ate (dry solids" thr 1.2Moisture % wt 2./

Screening Con$itions0eck 1 >ase :apacity thrft?1 2.3

0esired )eparation inches 1.// @Asi$e % 48.7%

5et or 0ry (50" 5 @Asi$e !act/r /.871

0esired 6fficiency % 7/% *alfsi$e % 48.7%


0eck :apacity thrft?1 9./8 0eck !actor .////

0ensity !actor .12/

@ver )i$e thr 4/.48 5et !actoror .////

% wt 12./% @pen area!actor /.;319

+ndersi$e thr 7.4 )creen 6fficiency !actor .12

% wt ;2./% )creen )urface !actor .////


)i$e % % :um % :um


3.// /% //./% /./%

4.// ;% 84.4% 9.;%

1.// 11% 9.% 48.7%

.// 11% 48.7% 9.%

/.2/ ;% 11.1% ;;.8%

/.12 % .% 88.7%

/.// % /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

Notes


5/17


#eneral

&ocation My 'lant

Number equired one


+nits +) DECK 3

rocess Data!eed Material )and -ravel Material !actor ./


!eed ate (dry solids" thr 7.Moisture % wt 2./

Screening Con$itions0eck 4 >ase :apacity thrft?1 4.8/

0esired )eparation inches .// @Asi$e % 24.4%

5et or 0ry (50" 5 @Asi$e !act/r /.;942

0esired 6fficiency % 7/% *alfsi$e % 19.;%

*alsi$e !actor /.;819

0eck :apacity thrft?1 9.;9 0eck !actor .////

0ensity !actor .12/

@ver )i$e thr 4/.78 5et !actoror .///

% wt 43./% @pen area!actor /.9/;3+ndersi$e thr 9/.3 )creen 6fficiency !actor .12

% wt 99./% )creen )urface !actor .////


)i$e % % :um % :um


3.// /% //./% /./%

4.// /% //./% /./%

1.// 1;% ;4.4% 19.;%

.// 1;% 39.;% 24.4%

/.2/ 1/% 19.;% ;4.4%

/.12 4% 4.4% 89.;%

/.// 4% /./% //./%/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

Notes


6/17


#eneral

&ocation My 'lant

Number equired one


+nits +) DECK 4

rocess Data



!eed ate (dry solids" thr 9/.Moisture % wt 2./


0esired )eparation inches /.2/ @Asi$e % 94.9%

5et or 0ry (50" 5 @Asi$e !act/r /.9993

0esired 6fficiency % 7/% *alfsi$e % 8.1%

*alsi$e !actor /.9;/4

0eck :apacity thrft?1 2.43 0eck !actor .////

0ensity !actor .12/

@ver )i$e thr 12.;/ 5et !actoror .4///

% wt 31.;% @pen area!actor /.2;48


% wt 2;.4% )creen )urface !actor .////


)i$e % % :um % :um


3.// /% //./% /./%

4.// /% //./% /./%

1.// /% //./% /./%

.// 49% 94.9% 49.3%

/.2/ 1;% 49.3% 94.9%/.12 8% 8.1% 8.8%

/.// 8% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

Notes


7/17


#eneral

&ocation My 'lant

Number equired one





!eed ate (dry solids" thr 43.3Moisture % wt 2./

Screening Con$itions0eck 2 >ase :apacity thrft?1 1./9

0esired )eparation inches /.48 @Asi$e % ;.3%

5et or 0ry (50" 5 @Asi$e !act/r /.9/48

0esired 6fficiency % 7/% *alfsi$e % /./%


0eck :apacity thrft?1 ;./1 0eck !actor .////

0ensity !actor .12/

@ver )i$e thr 9.;4 5et !actoror .2///

% wt 38.9% @pen area!actor /.211

+ndersi$e thr ;.; )creen 6fficiency !actor .12

% wt 2.3% )creen )urface !actor .////


)i$e % % :um % :um


3.// /% //./% /./%

4.// /% //./% /./%

1.// /% //./% /./%.// /% //./% /./%

/.2/ 34% 2;.% 31.7%

/.12 17% 18.9% ;.3%

/.// 17% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%


8/17

Notes

Vibrating Screen Design & AnalysisCopyright 2010, M. C. (Mike) Albrecht, .!. (A")#eneral

&ocation My 'lant

Number equired one





!eed ate (dry solids" thr ;.;Moisture % wt 2./


0esired )eparation inches /.2/ @Asi$e % /./%

5et or 0ry (50" 5 @Asi$e !act/r .1787

0esired 6fficiency % 7/% *alfsi$e % 2/./%

*alsi$e !actor .813

0eck :apacity thrft?1 .3/ 0eck !actor .////

0ensity !actor .12/

@ver )i$e thr .;; 5et !actoror .4///

% wt /./% @pen area!actor /.9497


% wt 7/./% )creen )urface !actor .////


)i$e % % :um % :um

(inches" etained 'ass etained3.// /% //./% /./%

4.// /% //./% /./%

1.// /% //./% /./%

.// /% //./% /./%

/.2/ /% //./% /./%

/.12 2/% 2/./% 2/./%

/.// 2/% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%


9/17

/.// /% /./% //./%

/.// /% /./% //./%

/.// /% /./% //./%

Notes

/.// /.2/ .// .2/ 1.// 1.2/ 4.// 4.2/ 3.//

/./%

1/./%

3/./%

% :um

etained

Sie (inches)


10/17

*ow to determine required screening area

= separate calculation is required for each deck of a multiple deck screen, although the same formula is utili$ed

)creening =rea B CCCCCCCCC+CCCCCCCCCB )quare !eet

=>:06!-*D

The succession of unknowns that must be established before using the formula is as followsE

(:lick on *yperlinked blue tet to access tables."

!actor F+F G +ndersi$e E =mount in )T'* of material feed to deck that is smaller than a specified aperture.!actor F=F G >asic :apacity E'redetermined rate of material )T'* through a square foot of a specified opening

!actor F>F G @versi$e E =ctual % of material in feed to deck that is larger than a specified aperture. (=dHusts !ac

!actor F:F G *alfsi$eE =ctual % of material in feed to the deck that is oneGhalf the si$e of a specified aperture. (

!actor F0F G 0eck &ocationE =pplies for multiple deck screens. Total screening area is available for top deck sep

!actor F6F G 5et )creeningE =pplies when water is sprayed on the material as it moves down the screening dec

!actor F!F G Material 5eightE =pplies for weights other than // lbs. per cubic foot. If bulk density of one cubic f

!actor F!FB lbs. per cu. ft.

//

!actor F-F G )creen )urface @pen =reaE =pplies when open area of screening surface is less than the open are

!actor F-F B % open area of screen surface being used

% open area indicated in capacity chart

!actor F*F G )hape of @pening E =pplies when rectangular openings are used. )lotted or oblong openings will p!actor FDF G 6fficiency E =pplies when obHective screening efficiency is less than 72%.

6fficiency B % of undersi$e in feed which actually passes

% of undersi$e in feed (should pass" )hape

0ensity

!actor F=F >asic :apacity

)creen )u % of @pen )T'* 'assing 'er )q

)creening =rea B FCCCCCCCCC+CCCCCCCC FB )quare !eet 3 /.;2 ;.97 ;.;/

=>:06!-*D 4.2 /.;; ;./4 ;./

4 /.;3 9.; 9.1

1.;2 /.;3 2.82 2.83

1.2 /.;1 2.21 2.2/1 /.; 3.7 3.89

.;2 /.98 3.2 3.23

.2 /.97 3.1 3.14

.12 /.99 4.87 4.7/

/.93 4.29 4.23

/.8;2 /.94 4.48 4.44

/.;2 /.9 4./8 4./

/.912 /.27 1.81 1.81

/.2 /.23 1.3; 1.37

/.4;2 /.2 1./8 1./8

/.12 /.39 .9 .28

/.8;2 /.32 .1; .18/.12 /.3/ /.72 /.72

/./74;2 /.32 /.;9 /.;;

/./912 /.4; /.28 /.28

/./412 /.3 /.47 /.48

!actor F0F


11/17

)creen &ocation on 0eck

0eck !actor F0F

Top

)econd /.7

Third /.8

!actor F-F

@pen =rea of )creen )urface

!actor F-F % @pen =rea of )urface +sed

% @pen =rea Indicated in :apaci

!actor FDF

6fficiency@bHective !actor FDF

72% /.777779

7/% .2 .;78 .12

82% .42 .428147 .2

8/% .2 .24;49 .;2

;2% .; .;938

;/% .7 .8729/4 1.12

/.2 1.91/88

/.12 4.2/;973


12/17

for each calculation.

when feed to deck contains 12% oversi$e (!actor F>F" and 3/% halfsi$e (!actor F:F".

or F=F to suit conditions"

dHusts !actor F=F to suit conditions".

aration. Time delay for material to pass top deck and 1nd or 4rd decks leaves less effective area available. This fa

k. -enerally, about 2 to ; -'M of water is used per )T'* of solids fed to the screen. The volume of water require

oot of material weighs J // lbs. cu.ft. .

a shown in the !actor F=F capacity chart.

ss more material per square foot than square openings.

2 2 2 2

3.313;;7 3.;97/2 8.444444 ;.3182;

/ / ;.812 1.73;9 1.;;;;;8

!actor F>F !actor F:F

'ercent of @versi$e Material in !eed to 0eck 'ercent of *alfsi$e Material in !eed to 0eck

;.;8 % @versi$ !actor F>F % *alfsi$e !actor F:F y B 89./13Kn18?9 G 1

9.79 2% .1 ./; /% /.3 /.33 /.33

9.48 /% .4 ./2 ./2 2% /.32 /.38

9.1 2% ./8 ./4 /% /.2 /.22 /.22

2.89 1/% ./1 ./ ./ 2% /.22 /.912.17 12% /.77 1/% /.9 /.; /.;/

3.79 4/% /.79 /.78 /.78 12% /.; /.;9

3.27 42% /.71 /.79 4/% /.8 /.8 /.84

3.8 3/% /.88 /.72 /.72 42% /.7 /.87

4.; 32% /.83 /.74 3/% /.7;

4.32 2/% /.;7 /.7 /.7 32% . ./;

4.2 22% /.;2 /.88 2/% .1 .1 .8

1.81 9/% /.; /.89 /.89 22% .4 .4

1.32 92% /.99 /.84 9/% .3 .3 .32

1./ ;/% /.91 /.8 /.8/ 92% .22 .9/

.2 ;2% /.28 /.;9 ;/% .; .8 .;;

.11 8/% /.24 /.; /.; ;2% .82 .72/.7 82% /.2 /.93 /.93 8/% 1 1.1 1.7

/.;2 7/% /.39 /.22 /.23 82% 1.1 1.2 1.2

/.28 72% /.44 /.3 /.3/ 7/% 1.3 4 4.//

/.3/ 72% 4.;2 4.;3

!actor F6F !actor F!F !actor F*F


13/17

5et )creening Material 5eight )hape of )creen )urf

@pening !actor F6F &bs.cu. ft. !actor F!F )hape !actor F*F

/./412 .12 . 2/ .2 )quare

/./912 .12 4 1 12 .12 )hort )lot .2

/.12 1 4.2 1.2 // &ong )lot ( .1

/.8;2 1.2 4.2 1.2 7/ /.7

/.12 1 4 1 8/ /.8/.4;2 .;2 1.2 .2 ;2 /.;2

/.2 .3 .;2 .4 ;/ /.;

/.;2 .4 .42 .1 9/ /.9

.12 .12 . 2/ /.2

.2 . 3/ /.3

1 4/ /.4

y

.12

.2 y B G2 L 2.;2

.;2

1

1.12

4.12

3.2


14/17

ctor is epressed as a percentage of the top deck effective area.

d should be supplied so that a portion is combined with the solids into a feed bo to prepare a slurry feed to the s

/.32 /.83

1.28Kn18?2 L 78.;1Kn18?3 G 83.11;Kn18?4 L 9.333Kn18?1 L /./;21Kn18 L /.331

72% /.44 /.43

7/% /.39 /.33

82% /.2 /.2/

8/% /.24 /.23;2% /.28 /.28

;/% /.91 /.9

92% /.99 /.92

9/% /.; /.;/

22% /.;2 /.;2

2/% /.;7 /.8/

32% /.83 /.83

3/% /.88 /.88

42% /.71 /.71

4/% /.79 /.79

12% /.77

1/% ./1 ./42% ./8 ./8

/% .4 .4

2% .1 .1


15/17

ce @pening


16/17

reen. The balance of water is added through a series of spray bars located over the screening deck.


17/17

sdm screen sizing.xls

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