Burning coal will produce smoke. Moreover, the composition of smoke produced by smoking is very complicated. In addition to a large number of particles, it also contains a variety of gaseous substances, some of which will have some taste.
Protective masks are effective for particulate matter. For the filtration of this kind of smoke, it is suggested that the filtration efficiency of protective masks should not be less than 95%. The effect on gaseous substances will not be very good. You can try 3M 8247 (NIOSH R95) or 3M 8577(NIOSH P95) masks, both of which contain a small amount of activated carbon, which can reduce the odor of some organic vapors.
I hope the above reply will satisfy you! If you have any questions, please feel free to ask the enterprise.