Chapter 5 Specific Illustrations -...
Transcript of Chapter 5 Specific Illustrations -...
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Chapter 5 Specific Illustrations
107
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108 Dust Control Handbook
Enclosure
Tire stopper -/
Dust suppression system
Isee Note 1: I
Dust suppression system
Airborne dust capture
Truck or Loader to Crusher
Note 1: Dust suppression system should be activated only during dumping cycle.
Note2 : Airborne dust capture system should also be activated during dumping cycle and may be kept
on beyorid the dumping cycle until adequate control of dust is achieved. 1
I I
Wet
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Specific Illustrations 109
Alternate exhaust hood location 1
n
QE
IF+ Exhaust hood
Receiving hopper
a Primary crusher
Truck or Loader to Crusher
QE = Exhaust air volume, CFM
T = Weight of material dumped, TPM, tons per minute
G = Bulk density of material, poundsIFt
Note: The open area at the face of the enclosure should be kept to a minimum.
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110 Dust Control Handbook
Dust suppression system lsee Notel: I \
Airborne dust (see Note 2 : I
Rotary car dumper
Railroad car
capture
Railroad Rotary Dump to Receiving Hopper
Note 1 : Dust suppression system should be activated only during dumping cycle.
Note2 : Airborne dust capture system should be activated during dumping cycle and may be kept on
beyond the dumping cycle until adequate control of dust is achieved.
wet
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Specific Illustrations 111
Enclosure
Exhaust hood
Receiving hopper
Railroad Rotary Dump to Receiving Hopper
Rotary car dumper /
_ Railroad car
QE = Exhaust air volume, CFM
T = Weight of material dumped, TPM, tons per minute
G = Bulk density of material, poundsIFt
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112 Dust Control Handbook
Ba
Receiving hopper
Airborne dust capture system Enclosure
I
ckspill rubber seal
Railroad Dump to Conveyor
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Specific Illustrations 113
Exhaust
Hopper car
xhaust hood X2
w 0 w z w Impact idlers Belt conveyor
Backspill rubber &al
Railroad Dump to Conveyor
QE,. QE2 =
*u,. A l.9 =
RI, R2 =
Sl# s2 = D ::
%, 5 lo *u, Rl S12 - D
OE2 z 10 Au2 \I R2 s22
D
Exhaust air volume, CFM
Enclosure open area at upstream, FT2
Rate of material flow, TPM
Height of fall, FT
Average material size, FT
Note 1 : C.$, and QE2 should be calculated by using appropriate values of A, , R and S .
Note 2 : This equation should be applied where D is greater than l/8 in.
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114 Dust Control Handbook
Feeder to:
Dust suppression system
Alternete location for
dust wppreseion system
Transfer chute
Hemmermill
Hammermill Crusher
Hinged duet curtain Alternate location for
dust ouppreseion svstem
Dust real Transfer chute
-Dust seal
Cone crusher
Cone Crusher
st ruppreeeion evetern bee note1
lmpactor
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Specific Illustrations 115
Feeder to:
1 Removable cover
QE = 10 x Au x $
J--
QE = Exhaust air volume, CFM
A, = Enclosure open area at upstream, FT*
A = Rate of material flow, TPH
S = Height of fall, FT
D = Average material size, FT
Note: This equation should be applied where
D is greater than 118 in.
Hinged dust curtain Exhaust hood
&, //Transfer chute
Oust seal
temate exhaust hood location
Hammermill
Hammermill Crusher
Hinged dust curtain
Transfer chute
Dust seal
hood location
Cone crusher
Cone Crusher
Hinged dust curtain
- OE
Dust seal
Transfer chute
lmpactor
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116 Dust Contxol Handbook
Feeder to:
Dust suppreasbn swtbm
I-4 Removable coven
Vibrating fee cumin
Alternate location for
Tight enclosurelcesing
Bucket elevator
Bucket Elevator
Alternate location for
ed dust curtain
Backspill rubber seal
V-plow Belt Conveyor
Dust suppression svstem- -Dust suppression sworn
capture ryscem
c Airborne dust cspture system
Storege bin/hopper
“J Storage Hopper
Wet
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Specific Illustrations 117
Feeder to:
Hinged dust curtain
Transfer
s = Sl + s2 2
QE =
= Exhaust air volume, CFM
= Enclosure open area at upstream, FT*
RU = Rate of material flow, TPH
S = Height of fall, FT
0 = Average material size, FT
Note: This equation should be applied where
D is greater than l/8 in.
Backspill rubber seal
Bucket eleval
Tight enclosure/casing
Alternate exhaust
Bucket Elevator
V-plow Belt Conveyor
3 Transfer chute
Storage bin/hopper
Storage Hopper
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118 Dust Control Handbook
Feeder to: Screen or Mill
Dust suppression system
Wet
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Specific Illustrations 119
Feeder to: Hinged dust
c+ = exhaust air voh~ma, CFM 4 = Encloe~re open ares at upltrum F-rz R = Rate of rMt@ial flow, TfW
S =HeightoffaH,K
0 = Avaragtt Werid #ia% n
Note: This equation should be applied where
D is greater than l/8 in.
screen
Rotating Screen Hinged d*yt curt&n
Transfer chute
Vibrating Screen
Hinged dust curtain A ‘E exhaust hood location
Transfer chute
Ball mill/rod mill
uu Ball/ Rod Mill
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120 Dust Control Handbook
Conveyor to:
Belt conveyor Hinged dust curtain
Note: Excessive moisture maV ceuse crusher jemming
Cone Crusher
Roll Crusher
Hammermill Crusher
lmpactol
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Specific Illustrations 121
Inspection door Hinged dust curtain, & Conveyor to:
Belt conveyor
QE = Exhaust air volume, CFM
%J = Enclosure open area at upstream, FT2
R = Rate of material flow, TPH
S = Height of fall, FT
D = Average material size, FT
Note: This equation should be applied where
D is greater than l/8 in.
Hinged dust curtain
I 8
Cone Crusher
Inspection door
Belt scraper
Feed box
I crusher
Feedbox
-4 Roll Crusher
inspection door
/Dust seal
hood
nil1
Hammermill Crusher
Inspection door
chute
.xnaust hood
FL Belt scraper
Rockbox
Impactor
lnipactor
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122 Dust Control Handbook
Conveyor to:
pelt conveyor
Hinged
Dust SUDDf0SSiOtl svstem
Mini rockbox -
Transfer chute ’ \ 2
-Bucket elevator
-Tight en&we/casing
Bucket Elevator
Dust suppression system
Transfer chute
_L Backspill rubber seal -
Impact idlers ” -pruw
Belt Conveyor
Hinged dust curtain
Inspection door
Airborne dust capture &rt a dust capture system
Storage Hopper wet
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Specific Illustrations 123
Conveyor to:
Belt conveyor Hinged
ight enclosure/casing
Transfer chute lternate exhaust hood
Bucket Elevator
s= Sl + s2
QE = 10 x Au x RS*
II--
2
D
QE = Exhaust air voluma, CFM
A, = Enclosure open area at upstream, FT* R = Rate of material flow, TPH
S = Height of fall, FT
D = Average material size, FT
Note: This equation should be applied where D is greater than 118 in.
Hinged dust curtain
Transfer chute Hinged dust curtain
Belt conveyor
Belt Conveyor
Hinged dust curtain
-V Storage Hopper
DY
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124 Dust Control Handbook
Conveyor to: Screen or Mill
Belt conveyor Hinged dust curtain .
Wet
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Specific Illustrations 125
Hinted dust curtain I-ion door
Conveyor to:
Belt conveyor Hinged dust curtsin
QE = 10 x A, x RS2 IF- QE = Exhaust air volume, CFM, ti = Enclosure opy area at upstream, FT2
= Rate of metenal flow, TPH S = Height of fall, FT 0 = Average material size, FT
Note: This equation should be applied where
D is greater than l/&n.
Hingad
Revolving
(! p.-_-_ _- ----mm_ _
, ;.-:+:- , ,ap_.-.- , .-,.9-t-
-: ;@_j3 :
I
z ,“?
~~
w ,:
:
----___ ----_ :
---we_
P----
Revolving Screen
scrsen
Impaction door
Vibrating Screen
dust cumin lnswction door
Transfer chute Bali miS/md mill
Ball Mill
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126 Dust Control Handbook
From: Jaw Crusher
ate location for airborne dust capture system
inged dust curtain
st capture system
From: Roll Crusher
ep bee note1 Oust suppression system
I /ii .
Hinged dust curtain
From: lmpactor
Aockbox Hinged dust curtain
Backspill rubber seal
V-plow
I Note: Excessive moisture mey ceuse crusher jamming
I To: Belt .Conveyor I 1
Wet
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Specific Illustrations 127
From: Jaw Crusher
Jaw crusher
Transfer chute
Rockbox
From: Roll Crusher
Roll crusher 1 f crusher throat opening
Hinged dust curtain Rockbox
dust
From: lmpactor
Transfer chute
OE =
DE = Exhaust air volume, CFM Au = Enclosure open area at upstream, FT~
: = Rate of material flow, TPH
D -. Height of fall, FT = Average material size, FT
Note: This equation should be applied where 0 is greater than t /8 in.
Rockbox Hinged dust curtain
Backspill rubber seal
nveyor
To: Belt Conveyor
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128 Dust Control Handbook
From: Cone Crusher
r-+-L-- Dust suooression system be noid .
Airborne dust C--l__..__
Rockbox ingad dust curtain
From: Hammermill Crusher
Hammarmifl
Transfer chute 1 Airborne dust capture syrtam
Rockbox Hinged dust curtain
From: Gyratbry Crusher
Gvratory crusher
Airborne dust capture system
Transfer chute / Enclosure
Rockbox in& dust cuttain
Backspill rubber seal
v-plow .
To: Belt Conveyor
Wet
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Specific Illustrations 129
From: Cone Crusher
dust curtain
From: Hammermill Crusher
Au -
Hinged dust curtain
From: Gyratory Crusher ,
Gyrstorv crusher
Transfer chute
throat opening
QE
Note: This equation should be af@ed where 0 is greater than l/8 in.
Rockbo
Backspill rubber seal
V-plow
To: Belt Conveyor
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130 DustControlHandbook
Screen to: Dust seal Dust suppression
Transfer chute
Crushers Dust suppression system
Tnnsfer chute
I I Airborne dust centure system Enclosure
svstem
Beckspill rubber sael
Conveyors
Dust suppression system
ctor
curtain
Impactors Wet
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Specific Illustrations 131
Screen to: heust hood
Rockbox
,Dust seal
Crushers
hood location
Transfer chute
Backspill rubber seal
v-plow Impact idlers
Conveyors
Belt conveyor
DE = lOxq,x fls*
6 0
Q = Exhaust air vduma, CFM Au = Enclosure open area at upstresm, R* R = Rate of material flaw, TPH
S = Height of fall, Fl D = Average material Size, m
Note: This equation should be applied wham
D is greater than l/8 in.
Note: Au depends upon tightness of enclosure
at the screen
h Transfer chute
Rockbox
Impactors
DY
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132 Dust Control Handbook
Screen to:
Bucket elevator
Tight mcbrurelcering
Elevators
Dust real Dust suppression system
Transfer chute
BeckspIll rubbar seal L
v-plow
Conveyors
Dust suppression system H
c Dust suppression system
I t- Transfer chute
Airborne
Note: Excd moietum may CfuBhm jllmming
dust capture system ;4 Airhome dust captuto srtem
\J’ Stomgs binlhopper
Hoppers
Wet
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Specific Illustrations 133
Bucket elevator
Screen to:
i& Screen covefs
Tight enclosure/casing
Elevators
Ex-haust hood
s=s1+_s2_ 2
C+ = Exhaust air vduma, CFM &= Enclosureopenamenupetreem,FT2 R = Rate of frmmial now, TPH
S = Height of fall, Fr
D = Awaga msterial eke, FT
Note: This equation should be applied where
0 is greater than 118 in.
Note: “Au” depends upon tightness of enclosure
at the screen
St sad i
Beckspill rubber eeel Impact idlers
Conveyors
Transfa chute
-l
_ t
Storage bin/hopper
Hoppers
DY
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134 Dust Control Handbook
Screen to: Enclosum
I screen
Dust suppression system
Transfer chute
Airbome dust capture system Enclosure
Hinged dust curtain
v-plow Impact idlem Belt conveyor
Conveyors
Dust suppmssion system - Dust suppression system
Airboma dust crptum system c * Airborne dust capture system
Wet
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Specific Illustrations 135
Screen to:
Transfer chute
Hinged dust curtain
Backspill rubber seal
V-plow Impact idlen Belt conveyor
Conveyors
Storage bin/hopper
4= 5
R = 1 s=
Enclo6ur6 opsn are6 at UPst~, FT2 Rate of material flow, TPH Might of fall, Fl I
I D = Average material size, -
I Note: This equation should be applied where
D is greater than l/8 in.
Note: Au depends upon tightness of enclosure at the screen
\
1
QE
t Exheuat hood
\
_
: ,* , ‘..
/
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136 Dust Control Handbook
Ball/Rod Mill to: Feeder or Scream
Wet
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Specific Illustrations 137
Ball/Rod Mill to:
gall mill/rod mill
Exhaust hood
Removable
Vibrating Feeder
cover
, QE = 200 CFM per square foot of open area
I , Note: Avoid excessive air velocities at the face of the hood to prevent
reentrainment of finely ground material
Vibrating Screen
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138 Dust Control Handbook
Ball/Rod Mill to:
Ball mill/rod mill
Q 0 0
._ P a 0’ 0 0 0 0 A r In
\ \ . . 2 Dust suppression aystrm
Transfer chute /
\ Tranrfer chute
, Tight enclosure/caring
Bucket Elevator
- Dust suppression ystem
Backspill rubber seal
Hinged dust curtain
Belt Conveyor
Transfer chute
MDust suppression svstem
gin cow
Airborne dust capture system -C _ Airborne dust cepture rwem
Storego bin/hopper
Note: Moisture may cause sticking of Material in chutaa.
Storage Bin Hopper Wet
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Specific Illustrations 139
Bali/Rod Mill to:
Ball mill/rod mill _
Dust seal
Bucket elev8tOr
ht enclosurelcasing
Bucket Elevator Transfer chute
Hinged dust
QE =
s=st** 10 x Au
2
QE = Au = R = s = D =
Exhaust air volume, CFM Enclosure open area at upstream, FT2 Rate of material flow, TPH Height of fall, FT . Average material size, FT
Note: Avoid excessive air velocities at the face of the hood
to prevent reentrainment of finely ground materiel.
Im~eit idlers
Belt Conveyor
( lnspaction door 41
Storage bin/hopper
Storage Bin Hopper
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140 Dust Control Handbook
Elevator to:
Bucket elevator
Tight
Dust suppression system
Transfer chute
Airborne dust cspture system
J ;I %/i/Hinged dur
Belt Conveyor
I Note: Wet systems are not recomended for fine powdery material I
I I
Elevator to: Screens
Wet
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Specific Ihstrations 141
Elevator to:
Bucket elevator
Tight enclosure/casing
Backspill rubber seal
V-plow Impact idlers
Belt Conveyor
QE = Exhaust air volume, CFM
A, = Enclosure open area at upstream, FT*
R = Rate of material flow, TPH
S = Height of fall, FT
D = Average material size, FT
Note: This equation should be applied where
0 is greater than l/8 in.
Revolving Screen
screen
Vibrating Screen
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142 Dust Control Handbook
Elevator to:
Tight
Bucket elevator L Dust supprerrion system
Transfer chute
Screw conveyor
Screw Conveyor
Dust suppression system
Airborne dust
Note: Wet systems are not recomended for fine powdery material
Storage Bin/Hopper
Wet
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Specific Illustrations 143
Elevator to:
Tight enclosure/casing
Screw conveyor
Screw Conveyor
OE = Exhaust air volume, CFM
A, = Enclosure open area at upstream, 6T2
R = Rate of material flow, TPH
S = Height of fall, FT
D = Average material size, FT
Note: This equation should be applied where
D is greater than 118 in.
Transfer chute
Storage bin/hopper
Storage Bin/Hopper
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144 Dust Control Handbook
Hopper to:
Airborne dust capture system
capture system Storage bin/hopper
Airborne dust capture system
Transfer chute
“d Vibrating Feeder
Backspill rubber seal
Enclosure
Hinged dust curtain
v-plow Impact idlers
Belt Conveyor
Tight enclosure/casing
Bucket elevator
Bucket Elevator
Wet
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Specific Illustrations 146
Hopper
Storage
bin/hopper
Transfer chute
< Exhaust hood
lternate exhaust hood location
Removable cover #’
Vibrating feeder
Vibrating Feeder
Hinged dust curtain
Sackspill rubber seal ,# Belt conveyor
a, = lOxq,x RS2
IF 0
OE= Exttaust air wlume, CFM s = Enclosure open area at upstream, FT2
R Rate of material flaw, TPH S f Height of fall, FT D = Average material size, Fl
Note: This equation should be applied where
D is greater than 118 in.
V.plbw Impact idlers
Belt Conveyor
Tight enclosure/casing
ucket elevator
lternate exhaust hood location
Bucket Elevator