Every year an estimated 2000 dust explosions occur in factories and refineries in Europe. There are approximately 50 reported dust explosions in the UK alone – that’s roughly one every single week. But these explosions are not solely the preserve of chemical or wood processing companies. A staggering 24 per cent of them occur within the food industry. In fact dry ingredients such as flour, custard powder, instant coffee, sugar, dried milk, potato powder, soup powder and cocoa powder have been responsible for 120 deaths in the past 30 years.
http://www.hazardexonthenet.net/article/40288/Dust-to-Dust.aspx?AreaID=2