(57) Pyrotechnic delay charge that contains FeSiZr as combustible and Bi2O3 as oxidizer in proportion 50 ± 15 wt. % FeSiZr and 50 ± 15 wt. % Bi2O3. FeSiZr is an alloy of dominant elements Si, Zr, Fe and Ti with content of trace
impurities originating from aluminosillicates. The limit representation of dominant
elements in FeSiZr is as follows: Si at least 30 wt. %, Zr at least 10 wt. %, Fe at
the most 25 wt. %, Ti at least 1 wt. %. The controller of combustion speed is the
additive TiO2 in the amount of up to 5 wt. % of the total weight.
The way of manufacture of the pyrotechnic millisecond delay charge in which FeSiZr
with limit representation of dominant elements Si at least 30 wt. %, Zr at least 10
wt. %, Fe at the most 25 wt. % and Ti at least 1 wt. %, are prepared in the physical
process of grinding to the particle size in the range of 1-10 µm, Bi2O3 to the particle size in the range of 1- 10 µm, whereupon these two components in
proportion 50 ± 10 wt. % FeSiZr and 50 ± 10 wt. % Bi2O3 are mechanically homogenized nad pelletized with pressure of 255 MPa, and after that
are crushed to grading of 0.2 - 0.8 mm grain size. Finally, the charge is pressed
into the delay tube with pressure of 280 MPa with column height of 5 up to 40 mm.
Industrial non-electric detonator has an enclosure in shape of a shell (1) with inserted
detonation tube. In the enclosure there is created a space at least for the primary
explosive and for the delay charge. The shell (1) closed at the bottom side has in
its bottom part created a space (11) for the secondary explosive, which is from above
closed with delay tube (12), in the cylindrical box of which there is placed primary
explosive (13) and delay charge (14) above it. Over the delay charge (12) in shell
(1) is inserted a sleeve (15) with amplifying charge (16) closed with cover (17),
and inserted from the upper part into shell (1) there is the detonation tube (19),
fitted with insulation (18) against the enclosure of the shell (1).
Industrial electric detonator has in shell (2) the fusehead (25) inserted, with in-lead
wires (26) fitted with insulation (27) against enclosure of the shell (2).
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