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A millisecond delay pyrotechnic composition for industrial detonators with explosion delay time of 25-1000 ms from the initiation, the method of manufacturing the delay composition and an electric and non-electric detonator
A millisecond delay pyrotechnic composition for industrial detonators with explosion delay time of 25-1000 ms from the initiation, the method of manufacturing the delay composition and an electric and non-electric detonator
The pyrotechnic delay composition contains FeSiZr as a flammable material and Bi.sub.2.n.O.sub.3 .n. as an oxidizing agent in the ratio of 50 .+-. 15 % of weight FeSiZr a 50 .+-. 15 % of weight Bi.sub.2.n.O.sub.3.n.. FeSiZr is an alloy of dominant elements of Si, Zr, Fe, with the contents of Ti, and trace admixtures originating from aluminosilicates. The threshold portion of the dominant elements in FeSiZr is: Si at least 30 % of weight, Zr at least 10 % of weight, Fe maximum 25 % of weight The regulator of burning speed is an additive TiO.sub.2 .n. in the amount of up to 5 % of weight from the total weight. When producing the millisecond delay pyrotechnic composition, FeSiZr is modified by a physical process of grinding to a particle size in the range from 1 to 10 .mi.m, Bi.sub.2.n.O.sub.3 .n. to a particle size in the range from 1 to 10 .mi.m, and then the two components are mechanically homogenized and made in tablets using the pressure of 255 .+-. 100 MPa, and, subsequently, they are crushed to fraction having a grain size of 0,2 to 0,8 mm. Finally, the composition is pressed into the casing of the detonator retarder using the pressure of 280 .+-. 100 MPa with column height of 5 to 40 mm. Further, there is described the electric and non-electric detonator containing this pyrotechnic delay composition.
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