41. In 1981, a dust explosion occurred at the Banbury factory when corn starch powder mixed with air, forming an explosive mixture. 42. On April 26, 1942, a gas and coal-dust explosion in the mine sent flames bursting out of the mine shaft entrance. 43. Investigators said Friday dust explosions are not uncommon, but that dust alone couldn't have led to Wednesday's enormous blast and ensuing fire. 44. By reducing the amount of combustible starch in the air, the machines also significantly reduced the risk of dust explosions and fire. 45. In the coal mining industry, a methane explosion can initiate a coal dust explosion , which can then engulf an entire mine pit. 46. In 2004, The Science Channel broadcast a documentary about the explosion and subsequent investigation, titled " Failure Analysis : Dust Explosion ". 47. Enclosed paper mill areas subject to such dangers commonly maintain very high air humidities to reduce the chance of airborne paper dust explosions . 48. There was a serious explosion on September 25, 1963, likely caused by a dust explosion in one of seven silos, which were tall. 49. The Board found that dust explosions posed a severe risk and made a number of recommendations to the Occupational Safety and Health Administration. 50. A fire or a dust explosion is caused if three conditions are met : combustible dusts, air ( oxygen ) and an ignition source.
