Dust Control Handbook for Industrial Minerals Mining and Processing

Figure 3.21. A fogger spray used to create a mist for dust suppression in the heading whereblasting will occur .................................................................................................................. 103Figure 3.22. A filtration unit, located adjacent to the blast heading, used for filtering thecontaminated ventilation air from the blast heading after blasting occurs ............................. 104Figure 3.23. A filtration unit, located in the blast heading, used for filtering the contaminatedventilation air from the blast heading after blasting occurs ................................................... 104Figure 4.1. Illustration of a jaw crusher showing material being crushed between fixed andreciprocating jaws ................................................................................................................... 113Figure 4.2. Examples of compressive crushers. Left—illustration of a cone crusher showingmaterial being crushed between the cone mantle and bowl liner. Right—illustration of agyratory crusher with material being crushed between the gyratory head and the frameconcave ................................................................................................................................... 114Figure 4.3. Examples of impactive crushers. Left—a hammermill-type crusher showingmaterial crushed between the rotating hammers and fixed grinding plate. Center—illustration of material being crushed between rotating hammers and fixed anvil plates inan impact breaker. Right—illustration of the size reduction action of a roll crusher ........... 114Figure 4.4. Illustration of a wet dust control approach with partial enclosure at a crusherdump loading operation. Note the blue "fan patterns" signifying water sprays .................... 115Figure 4.5. Illustration of a dry (exhaust) dust control system with a partial enclosure at acrusher dump loading operation ............................................................................................. 116Figure 4.6. Illustration of a dry (exhaust) dust control system at the transfer point of aconveyor discharge to a crusher feed hopper ......................................................................... 118Figure 4.7. Illustration of a dry (exhaust) dust control system on a feed chute into a transferchute feeding a crusher ........................................................................................................... 118Figure 4.8. Illustration of a dry (exhaust) dust control system at the discharge of a jawcrusher onto a belt conveyor .................................................................................................. 119Figure 4.9. Illustration of a dry (exhaust) dust control system at the discharge of ahammermill crusher onto a belt conveyor .............................................................................. 119Figure 4.10. Illustration of a wet dust control approach with a transfer chute/impact bedenclosure at a crusher loading operation ................................................................................ 120Figure 4.11. Illustration of a wet dust control approach on a crusher discharge/belt loadingoperation ................................................................................................................................. 121Figure 4.12. Cut-away illustration of a ball mill showing the charge consisting of thematerial being processed and balls ......................................................................................... 123Figure 4.13. Illustration of a stirring mill .................................................................................. 123Figure 4.14. Sampling doors located on top of a collection/transfer point to prevent leakage . 124Figure 4.15. Illustration of a dry (exhaust) dust control system on the feed to a rotary screenwith enclosed transfer chute ................................................................................................... 126Figure 4.16. Illustration of a dry (exhaust) dust control system on a vibrating screen .............. 127xvii