Dust Control Handbook for Industrial Minerals Mining and Processing

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FUNDAMENTALS OF DUSTCOLLECTION SYSTEMSWET SPRAY SYSTEMSCHAPTER CONTENTSDRILLING AND BLASTINGCRUSHING, MILLING,AND SCREENINGCONVEYING AND TRANSPORTBAGGINGBULK LOADINGCONTROLS FORSECONDARY SOURCESOPERATOR BOOTHS, CONTROLROOMS, AND ENCLOSED CABSHAUL ROADS, STOCKPILES,AND OPEN AREAS iii
Page 2 and 3: Report of Investigations 9689Dust C
Page 6 and 7: TABLE OF CONTENTSACRONYMS AND ABBRE
Page 8 and 9: Centrifugal Fans ..................
Page 10 and 11: Wet Control Methods ...............
Page 12 and 13: Air Spray Manifold ................
Page 14 and 15: Coatings ..........................
Page 16 and 17: Figure 1.28. Wall-mounted propeller
Page 18: Figure 3.21. A fogger spray used to
Page 24 and 25: ACRONYMS AND ABBREVIATIONSUSED IN T
Page 26: ACKNOWLEDGMENTSThe developers of th
Page 31 and 32: egulations are found in Chapter 1 o
Page 33 and 34: in the mining and mineral processin
Page 35 and 36: 2 IntroductionDUST CONTROL HANDBOOK
Page 37 and 38: 3. Operations involving the displac
Page 39 and 40: Figure 1.1. Relationship between st
Page 41 and 42: The airflow characteristic for an e
Page 43 and 44: Figure 1.5. Basic setup for a type
Page 45 and 46: The following air induction equatio
Page 47 and 48: Other Hood ConsiderationsWhen dust
Page 49 and 50: The implication of the figure is th
Page 51 and 52: Figure 1.10. Sawtooth design of a l
Page 53 and 54: The Use of Main Duct Trunk LinesFig
Page 55 and 56:
Orifice plates should also not be i
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AIR CLEANING DEVICESAir cleaning de
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Figure 1.15. Typical design of a cy
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Baghouse systems can also be design
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has more filter area to distribute
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Reverse Air CollectorsReverse air c
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Reverse jet collectors use timed bl
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It should be noted that cartridge c
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Spray Tower ScrubbersFigure 1.23. T
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Figure 1.24. Double dump weight-bas
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A filter fabric becomes more effici
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5. Abrasion. When the dust is abras
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sticky and adhere to any surface co
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occurs when the airflow and resulti
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Vaneaxial fans are similar to tubea
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Other Fan TypesAxial-centrifugal fa
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Johnson GQ [2005]. Dust control sys
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CHAPTER 2: WET SPRAY SYSTEMSProbabl
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Controlling Droplet SizeWhen using
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Figure 2.3. Contact angle resulting
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Hydraulically atomizing nozzles for
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Figure 2.10 illustrates a typical d
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filtering system to eliminate the p
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Figure 2.16. Nozzle corrosion—new
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Performance Testing of EquipmentDue
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DUST CONTROL HANDBOOK FOR INDUSTRIA
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CHAPTER 3: DRILLING AND BLASTINGThe
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that dust control efficiencies grea
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Water Separator SubWater separation
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The integrity of the drill deck shr
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Bailing airflow (Q B ) can be obtai
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ecome smaller as Q C /Q B increases
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pictured) was added to the door fla
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overlap to eliminate any gaps that
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Drill Stem/Deck LeakageDrill cuttin
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These drills may also contain a wat
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Wet drilling has been found to be t
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e a significant factor when optimiz
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Figure 3.21. A fogger spray used to
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Ventilation System DispersalThe mos
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USBM [1938a]. Effect of angle of dr
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CHAPTER 4: CRUSHING, MILLING, AND S
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the degree of enclosure of the cont
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Figure 4.4 illustrates a wet dust c
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Enclosure exhaust air volume (Q E )
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Figure 4.8. Illustration of a dry (
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Figure 4.11. Illustration of a wet
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Figure 4.12. Cut-away illustration
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Grinding circuits and buildings sho
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Figure 4.16. Illustration of a dry
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REFERENCESthACGIH [2010]. Industria
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There are three primary root causes
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direction of the receiving conveyor
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Figure 5.8. Depiction of an impact
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operational conditions this could m
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at different locations in an effort
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DESIGN CONSIDERATIONS FOR TRANSFER
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Q dis = calculated displaced air, c
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Normally, screw conveyors are total
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Figure 5.20. Depiction of a typical
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The dismantling of these airlock de
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Goldbeck LJ, Marti AD [2010]. Dust
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156 Conveying and TransportDUST CON
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For valve-type bags, three major du
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normally required for most industri
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Because of the product and dust emi
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Figure 6.6. Extended polyethylene b
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disposed of in a safe manner. A new
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Figure 6.9. Exhaust hopper below ba
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The dual-nozzle bagging system can
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these operations, the dust concentr
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CONTROL TECHNOGIES FOR CONVEYING AN
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entire pallet loading cycle. The li
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loaded onto the previous layer. The
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Plastic Pallet WrapThe final consid
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If dust is still being liberated, a
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WORK PRACTICES TO MINIMIZE DUST EXP
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Godbey T [2005]. Recirculating your
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188 BaggingDUST CONTROL HANDBOOK FO
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encases the product transfer sectio
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Figure 7.4. Skirt (in yellow box) a
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DUST SUPPRESSION HOPPERAnother modi
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Operator Booths/Control RoomsOne of
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CHAPTER 8: CONTROLS FOR SECONDARY S
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Clothes Cleaning BoothThe clothes c
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outside all mineral processing plan
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A second regulation is a general in
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type units. Some operations also co
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ventilation design [Cecala and Much
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CostsThe total structure ventilatio
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EXAMPLES OF SECONDARY DUST SOURCEST
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Figure 8.11. Worker closing bag val
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soiled with product, it is then tra
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Maximize the use of remote access f
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CHAPTER 9: OPERATOR BOOTHS, CONTROL
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Obviously, the higher the value for
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In Figure 9.2, the parameter values
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Figure 9.3. Positive cab pressure n
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quantity from 50 to 70 cfm (Q I ) w
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Because of the significant increase
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to be pulled directly back into the
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REFERENCESASABE [2003]. Agricultura
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CHAPTER 10: HAUL ROADS, STOCKPILES,
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oad maintenance, reduce equipment m
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with a smooth drum roller [National
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thickness of the subbase, wearing s
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suppressant is applied to the loose
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During a field study by the Nationa
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Petroleum EmulsionsPetroleum resins
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Other Dust Control MethodsSpeed Con
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performed. Short-term stockpiles co
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Figure 10.11. Example of tillage (f
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soil surface becomes compact and me
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Wind BarriersWind barriers for wind
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Figure 10.17. Layout demonstrating
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EPA [1998]. Section 13.2.2 Unpaved
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Watson JG, Rogers CF, Chow JC, DuBo
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Air velocity. The speed of air trav
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Diffusion. The spread of dust parti
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Hydraulic hollow cone nozzles. In w
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Semi-autogenous. Size reduction of
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Wet drilling. In surface drilling,
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