Chapter 5 Specific Illustrations -...

Chapter 5 Specific Illustrations

107

108 Dust Control Handbook

Enclosure

Tire stopper -/

Dust suppression system

Isee Note 1: I


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.


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


Enclosure

Exhaust hood

Receiving hopper

Railroad Rotary Dump to Receiving Hopper

Rotary car dumper /

_ Railroad car


T = Weight of material dumped, TPM, tons per minute

G = Bulk density of material, poundsIFt


Ba

Receiving hopper

Airborne dust capture system Enclosure

I

ckspill rubber seal

Railroad Dump to Conveyor


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.


Feeder to:


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


Feeder to:

1 Removable cover

QE = 10 x Au x $

J--


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


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


0 = Average material size, FT


D is greater than l/8 in.


Bucket eleval

Tight enclosure/casing

Alternate exhaust

Bucket Elevator

V-plow Belt Conveyor

3 Transfer chute

Storage bin/hopper

Storage Hopper


Feeder to: Screen or Mill


Wet


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



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


Conveyor to:

Belt conveyor Hinged dust curtain

Note: Excessive moisture maV ceuse crusher jemming

Cone Crusher

Roll Crusher

Hammermill Crusher

lmpactol


Inspection door Hinged dust curtain, & Conveyor to:

Belt conveyor


%J = Enclosure open area at upstream, FT2

R = Rate of material flow, TPH





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


Conveyor to:

pelt conveyor

Hinged

Dust SUDDf0SSiOtl svstem

Mini rockbox -

Transfer chute ’ \ 2

-Bucket elevator

-Tight en&we/casing

Bucket Elevator


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


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



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


Conveyor to: Screen or Mill

Belt conveyor Hinged dust curtain .

Wet


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


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


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


V-plow

I Note: Excessive moisture mey ceuse crusher jamming

I To: Belt .Conveyor I 1

Wet


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


nveyor

To: Belt Conveyor


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


v-plow .

To: Belt Conveyor

Wet


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


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


ctor

curtain

Impactors Wet


Screen to: heust hood

Rockbox

,Dust seal

Crushers

hood location

Transfer chute


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


Note: Au depends upon tightness of enclosure

at the screen

h Transfer chute

Rockbox

Impactors

DY


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


Bucket elevator

Screen to:

i& Screen covefs


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


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


Screen to: Enclosum

I screen


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


Screen to:

Transfer chute

Hinged dust curtain


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


Note: Au depends upon tightness of enclosure at the screen

\

1

QE

t Exheuat hood

\

_

: ,* , ‘..

/


Ball/Rod Mill to: Feeder or Scream

Wet


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


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


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


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


Elevator to:

Bucket elevator

Tight


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



V-plow Impact idlers

Belt Conveyor


A, = Enclosure open area at upstream, FT*





0 is greater than l/8 in.

Revolving Screen

screen

Vibrating Screen


Elevator to:

Tight

Bucket elevator L Dust supprerrion system

Transfer chute

Screw conveyor

Screw Conveyor


Airborne dust

Note: Wet systems are not recomended for fine powdery material

Storage Bin/Hopper

Wet


Elevator to:


Screw conveyor

Screw Conveyor

OE = Exhaust air volume, CFM

A, = Enclosure open area at upstream, 6T2






Transfer chute

Storage bin/hopper

Storage Bin/Hopper


Hopper to:


capture system Storage bin/hopper


Transfer chute

“d Vibrating Feeder


Enclosure

Hinged dust curtain

v-plow Impact idlers

Belt Conveyor


Bucket elevator

Bucket Elevator

Wet


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



V.plbw Impact idlers

Belt Conveyor


ucket elevator

lternate exhaust hood location

Bucket Elevator

Chapter 5 Specific Illustrations -...

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