Post on 20-May-2018
Chapter 5 Specific Illustrations
107
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
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.
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
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
112 Dust Control Handbook
Ba
Receiving hopper
Airborne dust capture system Enclosure
I
ckspill rubber seal
Railroad Dump to Conveyor
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.
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
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
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
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
118 Dust Control Handbook
Feeder to: Screen or Mill
Dust suppression system
Wet
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
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
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
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
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
124 Dust Control Handbook
Conveyor to: Screen or Mill
Belt conveyor Hinged dust curtain .
Wet
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
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
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
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
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
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
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
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
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
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
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
\
_
: ,* , ‘..
/
136 Dust Control Handbook
Ball/Rod Mill to: Feeder or Scream
Wet
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
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
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
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
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
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
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
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
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