Search results
Results from the WOW.Com Content Network
Dry chemical powder is used on all classes of fires. Dry chemical powder puts out the fire by coating the burning material with a thin layer of dust, thereby separating the fuel from the oxygen in the air. The powder also works to interrupt the chemical reaction of fire, so these extinguishers are extremely effective at putting out the fire.
An anticaking agent is an additive placed in powdered or granulated materials, such as table salt or confectioneries, to prevent the formation of lumps and for easing packaging, transport, flowability, and consumption. [1]
Caking is a powder's tendency to form lumps or masses. The formation of lumps interferes with packaging, transport, flowability, and consumption. [1] [2] Usually caking is undesirable, but it is useful when pressing powdered substances into pills or briquettes.
Coal breakers were located as close to the anthracite mine entrance as possible, so as to minimize the distance the coal had to travel before processing. [2] [4] Prior to entering the breaker, the coal would be crushed and sorted in a coal tipple [2] [8] and, if necessary and if water was available, washed.
In this process the primary powder particles are aggregated under high pressure. A swaying granulator or a roll compactor can be used for the dry granulation. Dry granulation can be conducted under two processes; either a large tablet (slug) is produced in a heavy duty tabletting press or the powder is squeezed between two counter-rotating ...
Portland cement clinker (abbreviated k in the European norms) is ground to a fine powder and used as the binder in many cement products. A small amount of gypsum (less than 5 wt.%) must be added to avoid the flash setting of the tricalcium aluminate (Ca 3 Al 2 O 6 ), the most reactive mineral phase (exothermic hydration reaction) in Portland ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Coal dust is a fine-powdered form of coal which is created by the crushing, grinding, or pulverization of coal rock. Because of the brittle nature of coal, coal dust can be created by mining, transporting, or mechanically handling it.