"It's believed a spark from the machinery inside the hopper ignited the blaze, which is burning in the feed residue that had been encrusted along the walls of the bin." Prior fire several days earlier causing an estimated $20,000 damage.Winnipeg Free Press
Many other manufacturing facilities have similiar process situations (ignition sources) where either a spark or spontaneous ignition can ignite the process materials causing a combustible dust related fire. Good housekeeping and maintenance is essential in removing the buildup of combustible dust or residue. Without the fuel, a combustible dust related fire will not occur.