Low explosive for metal welding and preparation method

Abstract

The invention provides a low explosive for metal welding. The low explosive comprises, in percent by weight, 27-30% of urea, 27-30% of nitric acid, 18-20% of ammonium nitrate, 0.10-0.15% of octadecyl primary amine, 21.90-25.85% of deposit white carbon black, and water. The low explosive is prepared according to the following preparation method: firstly adding 27-30 Kg of urea into 30-35 Kg of water according to the batches, heating to 30-40 DEG C, stirring, after dissolving, adding 27-30 Kg of nitric acid at a uniform speed within 10 min, and stirring for 30 min, so as to generate urea nitrate; adding 18-20 Kg of ammonium nitrate and 0.10-0.15 Kg of octadecyl primary amine into urea nitrate, heating with stirring, controlling the heating temperature for 100-110 DEG C, after 30 min, performing vacuum drying and crushing; and adding 21.90-25.85 Kg of deposit white carbon black, and performing grinding and uniform mixing, so as to obtain the low explosive for metal welding. The material cost is low, production is simple, the detonation sensitivity is good, the detonation velocity is stable and adjustable, the explosive detonation velocity is 2000-2400 m / s, the storage life is within 1 year, the explosive does not cake, production is safe and simple, the employed materials all do not contain toxic and harmful compositions, and the production and usage processes are harmless to contact personnel and environment.

Description

technical field [0001] The invention relates to a low-detonation-velocity explosive in the chemical industry, in particular to a low-detonation-velocity explosive for metal welding and a preparation method thereof. Background technique [0002] At present, the explosives used for metal welding are mainly expanded ammonium nitrate explosives, which have the following disadvantages: (1) The expanded explosives are easy to agglomerate; (2) The storage stability is not good; (3) The detonation velocity is unstable. In particular, the instability of the detonation velocity has caused a large number of waste products and unqualified metal explosion welding. [0003] CN200910144068-low detonation velocity explosion welding explosive; [0004] CN201410846932-A low detonation velocity explosive for explosive welding and its preparation method, [0005] The two disclosed invention patents use a large amount of ammonium nitrate or ammonium nitrate. Although the use of the two reflect...

AI Technical Summary

Problems solved by technology

[0002] Explosives currently used for metal welding are mainly expanded ammonium nitrate explosives, which have the following disadvantages: (1) expanded explosives are easy to agglomerate; (2) storage stability is not good; (3) detonation velocity is unstable

[0005] The two disclosed invention patents use a large amount of ammonium nitrate or ammonium nitrate. Although the use of the two reflects the explosive welding effect to a certain extent, the cost is high, and it is prone to safety accidents and it is difficult to control its use technology. At the same time, it is not conducive to its shelf life and non-caking