Hazards of dust and consequences arising out of dust explosions are still little understood by manufacturing facilities that handle dust of variety of materials, let it be, sugar, plastic, floor (wheat/maize/corn/...), metals (iron, zirconium, thorium,uranium, titanium,...), etc. Otherwise, there would have not been so many incidents every year leading to injuries and deaths of so many.
Proper measures like closed ventilation, maintaining humidity, earthing and bonding, flameproof electrical fittings, static discharge stations, cotton uniforms, periodical cleaning,etc will prevent dust explosions and its consequences.
Proper collection and disposal of dust needs to be given due attention.
An article in the following link is good reading material. There are few reports and video in www.csb.gov on the same subject.
http://www.iwatchnews.org/2012/05/29/8957/unchecked-dust-explosions-kill-injure-hundreds-workers?utm_source=iwatchnews&utm_medium=web&utm_campaign=rss