Top 48 How To Dispose Of Blasting Caps 12858 Votes This Answer

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What is inside blasting caps?

1. Fuse caps contain explosives like mercury fulminate, lead azide, and lead styphnate. Fuse caps are usually small metal tubes 1” – 2” in length and approximately ¼” in diameter. Fuse caps can detonate if subjected to heat, shock, or static electricity.

Is a blasting cap a detonator?

blasting cap, also called Detonator, device that initiates the detonation of a charge of a high explosive by subjecting it to percussion by a shock wave.

How sensitive is a blasting cap?

8 strength blasting cap (i.e., high explosives are 1. Straight Dynamite – Nitroglycerin in an absorbent, with velocities between 10,000 and 20,000 feet per second. This dynamite is the most sensitive of all commercial explosives.

What are types of blasting caps?

They are of two types: (1) the so-called regular delay, which has been in use since the early 1900s, and (2) the short-interval, or millisecond, delay, which was introduced about 1943. Except for a delay element placed between the ignition and primer charges, they are the same as instantaneous electric caps.

Why did coal miners bite blasting caps?

They also helped to regulate the timing of the explosion and allow time for the miners to leave the area. Black powder fuses are difficult to control, so using blasting caps was a safer way to blast rock. Although blasting caps tried to help improve the safety of miners, they also proved to be quite dangerous.

Can dynamite explode without a blasting cap?

Crystals will form on the outside of the sticks, causing them to be even more sensitive to shock, friction, and temperature. Therefore, while the risk of an explosion without the use of a blasting cap is minimal for fresh dynamite, old dynamite is dangerous.

Do detonators explode?

Detonators are hazardous for untrained personnel to handle since they contain primary explosive. They are sometimes not recognized as explosives due to their appearance, leading to injuries.

Can you burn det cord?

It is a high-speed fuse which explodes, rather than burns, and is suitable for detonating high explosives.

How many grains are in a blasting cap?

Most popular loads are 25, 40, or 50 grains. Detonating cord resembles safety fuse in appearance. However, you cannot light detonating cord with a match.

Does nitroglycerin explode if dropped?

Nitroglycerin is an oily, colourless liquid, but also a high explosive that is so unstable that the slightest jolt, impact or friction can cause it to spontaneously detonate.

What is the difference between a high explosive and a low explosive?

Explosives fall into two categories – high explosives and low explosives. The main difference between these two categories is the velocity of detonation. High explosives detonate at a rate greater than the speed of sound whereas low explosives deflagrate. Deflagration involves particle to particle burning.

What is C4 made of?

C4 was used during the Vietnam War as part of demolition blocks; today, it is commonly used in both military and civilian settings for demolition and flares. C4 is composed of RDX (91%), dioctyl sebacate (5.3%), polyisobutylene (2.1%), and mineral/motor oil (1.6%) [1].

Is c4 a blasting cap?

C-4 has a texture similar to modelling clay and can be molded into any desired shape. C-4 is metastable and can be detonated only by the shock wave from a detonator or blasting cap.
…
C-4 (explosive)

C-4
Filling weight	91%
Detonation mechanism	PETN-based detonating cord
Blast yield	High

How much does a pound of dynamite cost?

It suggests TNT was $0.44 per pound, or around $5.20 per pound in 2014. These estimates are consistent with that of a Quora commenter.

How much does a blasting cap weigh?

However, the strength of a blasting cap, as noted in the regulation, is measured not so much by the net explosive weight but by tests developed by the former U.S. Bureau of Mines. Even though for table of distances purposes the strengths of blasting caps through number 8 caps are weighed at 1½ lbs.

What are detonators made of?

Explosives commonly used in detonators include mercury fulminate, lead azide, lead styphnate, tetryl, and DDNP.

What is gelatin stick?

Gelignite (/ˈdʒɛlɪɡnaɪt/), also known as blasting gelatin or simply “jelly”, is an explosive material consisting of collodion-cotton (a type of nitrocellulose or guncotton) dissolved in either nitroglycerine or nitroglycol and mixed with wood pulp and saltpetre (sodium nitrate or potassium nitrate).

How many grains are in a blasting cap?

Most popular loads are 25, 40, or 50 grains. Detonating cord resembles safety fuse in appearance. However, you cannot light detonating cord with a match.

What is the composition of most detonators?

What is the composition of most detonators? A device used to create an explosion needed to ignite a high explosive. In most cases, detonators are blasting caps composed of copper or aluminum cases containing lead azide.

Disposing of blasting caps

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Summary of article content: Articles about Ask The Experts – How do I properly and safely dispose of blasting caps? A(1): Your local law enforcement folks can dispose of that. I know up in Placer County, an area where many blasting caps were used and many were left behind … …
Most searched keywords: Whether you are looking for Ask The Experts – How do I properly and safely dispose of blasting caps? A(1): Your local law enforcement folks can dispose of that. I know up in Placer County, an area where many blasting caps were used and many were left behind … Browse all articles from ICMJs Prospecting and Mining Journal.
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Summary of article content: Articles about How to dispose of blasting caps properly – Life in Germany – Toytown Germany almost be easier to take them in the woods set one by a tree, uncoil the wires around the tree, AAA battery – pop! no more cap. Or wait until … …
Most searched keywords: Whether you are looking for How to dispose of blasting caps properly – Life in Germany – Toytown Germany almost be easier to take them in the woods set one by a tree, uncoil the wires around the tree, AAA battery – pop! no more cap. Or wait until …
unpacking the last boxes, most of which were in storage for years. Oops – blasting caps are in there. I don’t need them, not going to use them and don’t wan…
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How to dispose of blasting caps properly – Life in Germany – Toytown Germany

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Most searched keywords: Whether you are looking for blasting cap | explosive device | Britannica Updating blasting cap, also called Detonator, device that initiates the detonation of a charge of a high explosive by subjecting it to percussion by a shock wave. In strict usage, the term detonator refers to an easily ignited low explosive that produces the shock wave, and the term primer, or priming composition, denotes a substance that produces a sudden burst of flame to ignite the detonator. The primer may be set off by the brief application of heat (from a burning fuse or an electrically heated wire), by friction, or by mechanical shock (like the impact of the firing pin ofblasting cap, encyclopedia, encyclopeadia, britannica, article
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Most searched keywords: Whether you are looking for explosive – Blasting caps | Britannica Updating Nobel’s original fuse-type blasting cap remained virtually unchanged for many years, except for the substitution of 90–10 and 80–20 mixtures of mercury fulminate and potassium chlorate for the pure fulminate. This did not affect the performance materially and provided a substantial economy. Mercury fulminate is an example of an explosive that can be both primary and secondary. In its more compressed form it is a high density base charge; less compressed, a low density primer charge. Hexanitromannitol (nitromannite) functions in the same manner and is used that way in a very successful blasting cap.
Extensive work was carried out onexplosive, encyclopedia, encyclopeadia, britannica, article
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Electrical firing

Blasting machines

Ignition systems

Delay systems

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Summary of article content: Articles about explosive – Blasting caps | Britannica Disposing blasting caps are dangerous, even for law enforcement officers. According to the Nevada County Sheriff’s Office, a homeowner on … …
Most searched keywords: Whether you are looking for explosive – Blasting caps | Britannica Disposing blasting caps are dangerous, even for law enforcement officers. According to the Nevada County Sheriff’s Office, a homeowner on … Nobel’s original fuse-type blasting cap remained virtually unchanged for many years, except for the substitution of 90–10 and 80–20 mixtures of mercury fulminate and potassium chlorate for the pure fulminate. This did not affect the performance materially and provided a substantial economy. Mercury fulminate is an example of an explosive that can be both primary and secondary. In its more compressed form it is a high density base charge; less compressed, a low density primer charge. Hexanitromannitol (nitromannite) functions in the same manner and is used that way in a very successful blasting cap.
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Ignition systems

Delay systems

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Most searched keywords: Whether you are looking for Blasting caps bring out Vancouver explosives disposal unit | Vancouver Sun For the second time in less than a week Vancouver police have destroyed blasting caps found in a 100-year-old central Vancouver home … For the second time in less than a week Vancouver police have destroyed blasting caps found in a 100-year-old central Vancouver home undergoing renovation.
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blasting cap | explosive device

blasting cap, also called Detonator, device that initiates the detonation of a charge of a high explosive by subjecting it to percussion by a shock wave. In strict usage, the term detonator refers to an easily ignited low explosive that produces the shock wave, and the term primer, or priming composition, denotes a substance that produces a sudden burst of flame to ignite the detonator. The primer may be set off by the brief application of heat (from a burning fuse or an electrically heated wire), by friction, or by mechanical shock (like the impact of the firing pin of a gun).

Depending on the preferred method of initiating the explosion, the blasting cap may contain a primer alone or both a primer and a detonator.

explosive – Blasting caps

Nobel’s original fuse-type blasting cap remained virtually unchanged for many years, except for the substitution of 90–10 and 80–20 mixtures of mercury fulminate and potassium chlorate for the pure fulminate. This did not affect the performance materially and provided a substantial economy. Mercury fulminate is an example of an explosive that can be both primary and secondary. In its more compressed form it is a high density base charge; less compressed, a low density primer charge. Hexanitromannitol (nitromannite) functions in the same manner and is used that way in a very successful blasting cap.

Extensive work was carried out on replacements for the costly mercury fulminate; by 1930 little of it remained in use, and by the 1970s it had disappeared from commercial use. Experience has shown that the cheaper replacements are actually superior.

The dominant base-charge materials are now pentaerythritol tetranitrate (PETN) and cyclotrimethylenetrinitramine (RDX). These are as strong as nitroglycerin, quite safe to manufacture and handle, and relatively inexpensive. In addition to low density nitromannite, diazodinitrophenol, lead styphnate, and lead azide are widely used as ignition-primer charges. One other departure from Nobel’s blasting cap is the fact that aluminum has now almost entirely replaced copper as the material used for the shell.

Most countries require explosives in underground coal mines to be fired electrically but prohibit the use of aluminum-shell electric blasting caps. This is because aluminum burns with a very hot flame and is much more likely than copper to ignite coal gas . Otherwise, almost all electric blasting-cap shells are made of aluminum.

Match-head ignition, very popular in Europe, is used less widely in the United States. The ignition device consists of a piece of cardboard with a thin sheet of metal glued to each side. A bridge wire is soldered to these sheets, around the end of the cardboard, and this part of the assembly is dipped in a slurry of ignition mixture, usually based on copper acetylide. After drying, the match head is given a protective coating and is then soldered to the leg wires.

In 1939 the du Pont company introduced a revolutionary new type of ignition system . Nylon plastic was substituted for the cotton insulation, a rubber plug to hold the leg wires replaced the sulfur plug, and the bridge wire was welded to the leg wires instead of soldered. By that time alloys such as nichrome had largely replaced the platinum bridge wires. The shell was crimped tightly to the rubber plug, with the result that the cap could withstand a substantial amount of water pressure . All electric blasting caps are now made substantially in this way. Polyvinyl chloride is widely used for the leg wire insulation, and plastic is sometimes substituted for rubber in the plug.

It was in the 1880s that the forerunner of the modern electric blasting cap was first assembled. In contrast to the spark-type ignitions previously used, it employed a fine, high-resistance wire soldered between two insulated leg wires and embedded in, or coated with, an ignition mixture. The resistance wire was either platinum or one of its alloys , and the ignition mixture was based on mercury fulminate. The leg wires were insulated with two layers of cotton thread, wound in opposite directions. Except for coal-mine caps, the wire was then run through a bath of molten asphalt. Paraffin wax was used for the coal-mine caps because its white colour provided good contrast with the black coal. Sulfur , or a mixture of sulfur and mica or graphite, was used to hold the leg wires in place and seal the cap. Sulfur was well suited for this purpose because its melting point is very low and it is compatible with the explosive ingredients. Later, to obtain better water resistance, part of the sulfur was replaced by asphalt.

Except for the means of firing, there is little difference between electric and fuse-type blasting caps. With minor variations, the explosives used are the same.

The first satisfactory electrical blasting machine was invented by H. Julius Smith, an American, in 1878. It comprised a gear-type arrangement of rack bar and pinion that operated an armature to generate electricity. When the rack bar was pushed down rapidly, it revolved the pinion and armature with sufficient speed to obtain the desired current. This current was released into the external, or cap, circuit when the rack bar struck a brass spring in the bottom of the machine. Smith’s blasting machine was improved and made in a range of capacities; also, a small twist-type machine that employed basically the same principles was introduced. These machines are still in widespread use, although they have been replaced to a considerable extent by power firing and capacitor-discharge blasting machines. The latter have a battery power source for energizing one or more capacitors and a safe, dependable means for discharging the stored energy . They have high capacity for their weight and size and are rapidly displacing the other firing systems.

The principal advantages of electric over fuse firing are exact control of the time when the blast is initiated, the simultaneous firing of a number of shots, if that is desired, and the ability to obtain a very high degree of water resistance. Attempts to make electric blasting caps date back to the 1700s, but nothing of a really practical nature was developed until late in the 19th century. There were two separate problems, the cap and the means to fire it.

Delay systems

Delay, or rotational, shooting has many advantages over instantaneous firing in almost all types of blasting. It generally gives better fragmentation, more efficient use of the explosive, reduced vibration and concussion, and better control of the rock. For these, and sometimes other reasons, most blasting operations are now conducted with a delay system.

It is probable that the first use of delay firing was in tunnels. The centre was shot out first and then successive rings around it until the desired tunnel dimensions were reached. The procedure was to cut all the fuses to the same length and then trim them toward the centre; for example, the outside ring of fuses would be full length, the next ring a few centimetres shorter, and so on. In addition, the fuses were lit from the centre out, causing a little more delay in the desired direction. This method of shooting could not be used until Bickford’s safety fuse, which had a uniform burning speed, became available.

Delay electric blasting caps are the most commonly used means for obtaining rotational firing. They are of two types: (1) the so-called regular delay, which has been in use since the early 1900s, and (2) the short-interval, or millisecond, delay, which was introduced about 1943. Except for a delay element placed between the ignition and primer charges, they are the same as instantaneous electric caps.

A typical series of regular delays would comprise 14 periods ranging from a few milliseconds to about 12 seconds. To avoid overlapping and because there is some variation in the burning speed of the delay element, the intervals are made longer in the higher periods; for example, the delay between periods 1 and 2 might be 0.8 second, whereas for 13 and 14 it might be 1.5 seconds. Ordinary delays have been largely replaced by short-interval delays but are still used to a considerable extent for such purposes as driving tunnels and sinking shafts.

The periods in short-interval delays are usually separated by 25 milliseconds up to 200 milliseconds, by 50 up to 500, and by 100 up to 1,000 (one second). This close spacing gives improved fragmentation, the ability to fire many holes with hardly any more vibration or concussion than would be obtained with one hole, less chance that the detonation of one hole will cut off an adjacent hole, and a reduction in the quantity and cost of explosives. Short-interval delays are used above ground, in such work as excavating and quarrying, and for almost all types of underground mining. Their development is one of the major advances in explosives.

Delay elements for electric blasting caps function in about the same way as black powder in safety fuse, except that the chemical mixtures used are much faster. At times the delay mixture is simply pressed on top of the primer mix. Usually, however, it is put in the centre of a metallic tube in lengths that will give the desired delay interval.

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Top 48 How To Dispose Of Blasting Caps 12858 Votes This Answer

What is inside blasting caps?

Is a blasting cap a detonator?

How sensitive is a blasting cap?

What are types of blasting caps?

Why did coal miners bite blasting caps?

Can dynamite explode without a blasting cap?

Do detonators explode?

Can you burn det cord?

How many grains are in a blasting cap?

Does nitroglycerin explode if dropped?

What is the difference between a high explosive and a low explosive?

What is C4 made of?

Is c4 a blasting cap?

How much does a pound of dynamite cost?

How much does a blasting cap weigh?

What are detonators made of?

What is gelatin stick?

How many grains are in a blasting cap?

What is the composition of most detonators?

Ask The Experts – How do I properly and safely dispose of blasting caps?

How to dispose of blasting caps properly – Life in Germany – Toytown Germany

how to dispose of blasting caps

blasting cap | explosive device | Britannica

how to dispose of blasting caps

explosive – Blasting caps | Britannica

explosive – Blasting caps | Britannica

Blasting caps bring out Vancouver explosives disposal unit | Vancouver Sun

Resident brings 1950s blasting caps into fire department, bomb squad called – mlive.com

UPDATE: Robot to dispose of 30-year-old blasting caps | News | gazette.com

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Ask The Experts – How do I properly and safely dispose of blasting caps?

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