FI73662C - KNALLHATTSMASSA, FOERFARANDE FOER DESS FRAMSTAELLNING OCH DESS ANVAENDNING I SLAGKNALLHATTAR FOER FOERDROEJNINGSDETONATORER, SAOSOM HANDGRANATER. - Google Patents

Description

1 73662

This invention relates to a detonating composition containing lead trisinate as an explosive, tetrazene as a sensitizer and barium nitrate as an oxygen donor, and a suitable fuel. In addition, the present invention relates to a method for producing the above-mentioned detonator mass and its use in percussion detonators of slow detonators such as hand grenades.

The friction ignited by the friction of slow detonators, and especially hand grenades, has already been sought to replace the chicken with a standard !, which can be easily manufactured in series production and which is also easy to install. However, the detonator masses used in current teddy bears generate a relatively large amount of gas and thus give too strong an impulse to be used in slow-moving detonators such as hand grenades. However, if the amount of the evolving gases and thus the impulse is reduced by reducing the amount of the detonator mass, the ignitability of the detonator at the same time deteriorates too much relative to the retarder. The use of existing detonators in slow detonators has thus been hindered by the excessive impulse of the detonator mass of these detonators, as a result of which degassing orifice solutions in detonators equipped with such detonators have become very complex and have also caused sealing problems.

Such a previously known high gas generating detonator typically has contained lead trisinate as an explosive, tetrazene as a sensitizer, barium nitrate as an oxygen donor, and a mixture of calcium silicide and antimony sulfide as a fuel. However, such a detonator mass has not been able to be used in slow-motion detonators, such as hand grenades, because it generates too much gas, thus giving too strong an impulse.

? 73662 Σ s Ί1 1 ϊ j] e v a n one of the purposes of the invention is therefore ai - '·: a e n s a a da r a i 1 i m a s s a ,, o I; a k e hi tearing I reduce gases than the previously known π a ‘~ m e. s s a t, .Titta which, in spite of this, is just as good as the ability.

According to the present invention, a mixture of silicon and lead, i.e. Pb 2 O 4, Pb 2 O 4 and / or PbO 2, which is a low-gas-generating, flammable and highly flammable incandescent mass, is used as the fuel for the detonator mass.

The detonating mass according to the invention preferably contains 30-35% by weight of lithium silicate a, 3-6% tetracin i a, 15-20% Bari umr · - 'wire a, 13-19% silicon and 20-30%

PbO of Pb 0 and / or ° b 0.

2 3 2 3 4

The invention also relates to a process for the preparation of the above-mentioned detonator mass, in which oxygen-donating barium nitrate and Pb 0 acting as fuel are mixed with each other.

Pb 0 and / or PbO and silicon, moisten and granulate the mixture obtained for 2 years, which, after drying and screening, is mixed with lead trisinate and te trasene. with. The granules are preferably sized to a grain size of less than 0.5 mm and dried at an elevated temperature of about 50-70 ° C before being mixed with lead trisinate and tetrazene to give a bulk. The barium nitrate grain size used is preferably less than 0.25 mm and the silicon grain size is preferably 0.025 .mu.m.

In the present invention, the -pk ai non nail mass is excellently suitable for use in the so-called h i c? blasting, such as the impact of hand grenades, in place of the friction flammable masses previously used in these blasters. The structure of the detonator used may be of the conventional type, but the detonator mass has been replaced by a new low-gas, but still flammable detonator mass according to the invention.

Il 3 73662

The invention is described in more detail below by way of example.

Example

155 g of barium nitrate with a grain size of less than 0.25 mm, 405 g of polymeric lead ice and 240 g of silicon with a grain size of less than 0.025 mm are mixed together. The substances are mixed in the form of a dry powder to a homogeneous mixture for 10 minutes. The dry-mixed mixture is then moistened with water to a dough-like mass which is stirred for 15 minutes to give granules which are sieved through a sieve with a mesh size of one mm and dried overnight at about 60 ° C. The granules are then sieved through a further 0.5 mmm sieve and dried at a further 60 ° C for 24 hours. The dried granules can be stored in sealed plastic or glass containers unless they are immediately made into a detonator.

To the batch of granules prepared as mentioned above, 525 g of lead trisinate and 75 g of tetrazene are added, after which the ingredients are mixed into a homogeneous mass which is packed in small electrically conductive rubber jars for storage. The detonator mass thus prepared is filled with impact dummies that can be used in slow detonators such as hand grenades. With a detonator fitted with 18 mg of detonator mass prepared as described above, the following values were obtained in the tests: the average sensitivity was 1.41 kpcm (typical impact energy at least 2.3 kpcm). The pressure against the detonator retarder averaged 44 bar, with a maximum of 50 bar and a minimum of 39 bar.

The detonators equipped with teddy bears filled with the detonator mass according to the invention have worked well and the time dispersion has remained small, i.e. the timing accuracy of the retarder has been good while the pressure produced by the detonator has remained small and the deceleration time constant.

Claims (6)

7 3 6 6 2 Pa exam requirements A detonating mass containing 1-lead trisinate as an explosive, tetrazene as an explosive, barium nitrate as an oxygen donor and a fuel, characterized in that the fuel is a mixture of silicon and Pb 2 O 3, Pb 2 O 2 and / or PbO 2 n, which is a highly flammable fire with a well-transmitting glow that produces little gas. Detonator pulp according to Claim 1, characterized in that it contains, based on the weight of the detonator pulp, 30-35% of 1-γ-γ-trisinate, 3-6% of tetrazene, 15-20% of barium nitrate, 13-19 μl of diet and 20-30% of Pb 0. , Pb 0 and / or PbO. 3 4 2 3 2 Process for the preparation of a detonator mass according to claim 1, comprising lead trisinate, tetrazene, barium nitrate and fuel, characterized in that oxygen-donating barium nitrate and Pb 0, Pb 0 and / or PbO and fuel 3 4 2 3 2 silicon, moisten and granulate the mixture thus obtained, which, after drying and screening, is mixed with lead trisinate and tetrasenene. Process according to Claim 3, characterized in that 15 to 20% of barium nitrate, 20 to 30% of Pb 0, 34% of Pb O and / or PbC and 13 to 19% of the total weight of the detonator mass are mixed together. silicon, sieve the granules 2 o 2 to a grain size of less than 0.5 mm, dry the granules at an elevated temperature of about 50-7 ° C and mix the dried granules and 30-35% lead trisinate and 3-6% tetrazene to a mass. Process according to Claim 3 or 4, characterized in that barium nitrate having a grain size of less than 0.25 mm and silicon having a grain size of less than 0.025 mm are used. Il 5 73662 6. Use of such pulp in explosives of eastern steelmakers, such as hand grenades, containing 30-35% lead trisinate, 3-6% tetrasenium, 15-20% barium nitrate, 13-19% silicon and 20-30% Pb, based on the weight of the detonator mass 0: a, Pb 0: a,. 3 4 2 3 and / or PbO.