Flour mill dust

Flour Mill Dust Sprayed Zinc Dust y sed I... 

Dusts from barley, oats, rye, wheat or maize, or The baking or flour milling industry or on farms... 

Dust can be emitted wherever solids are mined (e.g. in quames), processed (e.g. flour mills, woodworking factories, metal smelting and foundries), or handled/transported in particulate form. Construction and demolition operations also generate dust. 

Proteolytic enzymes Animals, including insects and other arthropods or their larval forms Dusts from barley, oats, rye, wheat or maize, or Biological washing powders and the baking, brewing, fish, silk and leather industries Research and educational laboratories, pest control and fruit cultivation The baking or flour milling industry or on farms... 

Dust explns) 19) M.G. Gozhello, Khim-ReferatZhur 1940(4), 129 CA 36, 3669(1942) (Dust explns in various industries) 20) S.E. Petrov, Ibid, 1940(4), 129-30 (Dust explns particularly in flour mills) 21) H.R. Brown, USBurMinesCirc 7183, 7 pp(1941) (Dust expln hazards from some powdered metals) 22) J.B. Ficklen, JChemEducation 19, 131-34(1942) (A survey of types of dust explns, causes, prevention and control) 23) S.C. Blacktin, ChemAge(London) 47, 53-7(1942) CA 36, 7320(1942) (Dust explns) 24) A.C. Fieldner W.E. Rice, USBurMines 1C 7241(1943) ... 

When fine powders spread out into the air, they expose a vast surface area to oxygen molecules in the air. There have been devastating explosions in flour mills when finely powdered flour has mixed with air. The mixture explodes if there is the slightest spark, say from a nail in a shoe striking the floor. The BANG that is heard is the result of the extremely fast reaction, as it produces products so violently that the molecules fly apart faster than the speed of sound - they produce a shock wave that breaks the sound barrier . Mixtures of coal dust and air explode similarly, and have caused thousands of deaths in the coal-mining industry. 

Combustible dusts may be present in many different types of facilities. Common places for combustible dusts to be found are in grain elevators, flour mills, woodworking shops, and dry-bulk transport trucks. Dusts in facilities have caused many explosions over the years that have killed and injured employees. An explosion occurred in a facility on the East Coast that had many hazardous materials on site. At first, it was thought that one of the chemicals had exploded. The hre department and the hazmat team were called to the scene. Investigation revealed that the explosion occurred in a dust-collection system it was a combustible-dust explosion. Dust explosions can be prevented by proper housekeeping and maintenance practices at facilities where these types of dusts are present. 

After grain is received at a flour mill, it is first cleaned to remove dust, foreign seed, chaff, etc. by methods based on differences in density, size, and shape of the materials, usually on inclined planes and/or by use of air currents. The next step is tempering or conditioning, in which water is added (usually) or removed from the grain to give a distribution of moisture that is optimal for subsequent separation of the constituents. The... 

Does the enterprise require the operation of grain elevators, feed mills, flour mills, rice mills, dust-pelletizing plants, dry corn mills, soybean flaking operations, and dry grinding operations of soy cake ... 

Safety- or health-hazard ehmination, as in collection of siliceous and metalhc dusts around grinding and drilling equipment and in some metallurgical operations and flour dusts from milling or bagging operations... 

Similarly, in a mill, flour dust can explode in the presence of air. 

---