This compound was superseded by others: lead azide, lead styphnate, some aluminium, or other materials such as DDNP ( diazo dinitro phenol) to reduce the amount of lead emitted into the atmosphere by mining and quarrying operations. Old detonators used mercury fulminate as the primary explosive, often mixed with potassium chlorate to yield better performance. Traditional fuse caps have a fuse which is ignited by a flame source, such as a match or a lighter. Electric types are set off by a short burst of current sent to the cap, by a blasting machine via a long wire or a radio controlled source to ensure safety. They including non-electric caps, electric caps, and fuse caps, the last two being the most common.
Top: small nonel detonator with 2 ms delay for chaining nonel tubes middle: class B SPD detonator bottom: class C SPD detonator Inserting detonators into blocks of C-4 explosiveĪ detonator, sometimes called a blasting cap in the US, is a small sensitive device used to provoke a larger, more powerful but relatively insensitive secondary explosive of an explosive device used in commercial mining, excavation, demolition, etc.ĭetonators come in a variety of types, depending on the way they are initiated (chemically, mechanically, or electrically) and details of their inner working, which often involve several stages. JSTOR ( June 2015) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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