RU2221762C1 - Method to manufacture a water-resistant non-preventive explosive - Google Patents

Abstract

FIELD: chemical industry. SUBSTANCE: the invention presents a method to manufacture a water-resistant nonpreventive explosives made of the utilized ballistite and pyroxyline blasting powders. The offered method of manufacture of the water-resistant nonpreventive blasting explosive, provides for ammunition of the powder elements, forge-rolling, a batching and packing. In the process of the forge-rolling the comminuted powder elements are added with a sensitizer that has a form of suspensions or a powder. In the capacity of the sensitize they use oxides of metals, and before the batching the pressing is performed. The invention promotes production of a water-resistant non-preventive blasting explosive with good sensitivity to the initiation means and rather high detonation features. EFFECT: the invention allows to produce waterproof-explosive with good sensitivity initiating means. 1 dwg, 1 tbl

Description

 The invention relates to a method for producing waterproof non-explosive explosives made from recycled ballistic and pyroxylin powders.

 Currently, the actual problem of the disposal of ammunition using them in the national economy, namely the use of powder elements extracted from ammunition as industrial explosives. This helps reduce the shortage of water-resistant industrial explosives, as well as reduce stockpiles of obsolete ammunition, dangerous for further storage and environmentally harmful for destruction.

 The raw material for obtaining the explosive may be recycled ballistic or pyroxylin powder. In addition, ballistic and pyroxylin gunpowders contain explosives, salts and metal oxides, which can act as sensitizers. For example, from artillery ballistic and pyroxylin gunpowders granipores of grades BP-1, BSP-1, and gelpores of grades Gelpor-1 are produced. From pyroxylin gunpowder and ballistic rocket solid fuels, granipores of the BP-3, BPS-2 brands, and gelpores of the Gelpor-3 brand are produced.

 There is a method of producing waterproof non-explosive explosives (Zhegrov E.F., Telepchenkov V.E., Berkovskaya E.V., Mordvinov N.A. Utilization of artillery gunpowders and rocket ballistic fuels for industrial explosives. // Conversion. - 8 . - 1997. - p.26-28), where the processed ballistic and pyroxylin gunpowder are used as raw materials. This method is adopted by the authors for the prototype.

The method includes the following steps:
- grinding of powder elements (BP-1, BPS-1 graders with a tube cutting machine of the ART-10P type; BPS-1, BPS-2 graders with a PMAS ripper; BS, BP-3 graders with a planer or pneumatic knife);
- rolling (for granipores of grades BS and BP-3);
- the addition of technological additives (industrial oil);
- dosage and packaging.

 Note that the explosive obtained in this way has characteristics comparable to those of other explosives made from recycled ballistic and pyroxylin powders. However, the explosive has insufficient sensitivity to initiating means and insufficient detonation characteristics, which ultimately complicates the detonation of the charge and its stable detonation. This is explained by the insignificant content of the sensitizer and the absence of a pressing stage, which makes it possible to obtain a more homogeneous (homogeneous) and dense explosive mass with enhanced detonation characteristics.

 The objective of the invention is to obtain a waterproof non-fuse explosive with good sensitivity to initiating means and sufficiently high detonation characteristics.

 The problem is solved due to the fact that in the method of producing a waterproof non-explosive explosive substance, including grinding powder elements, rolling, dosing and packaging, at the stage of rolling, a sensitizer is introduced in the form of a suspension or powder into the crushed powder elements, which are used as metal oxides, and before dosing, pressing is carried out.

 To increase the detonation ability, sensitizers are introduced into the composition of explosives. As sensitizers, metal oxides are used.

 The introduction of the pressing stage allows to obtain elements of explosives of a given size with a concomitant strengthening of the plasticization process, which ultimately affects the health of the composition.

 A method of obtaining a waterproof non-fuse explosive is shown in the drawing. The technological process of processing ballistic gunpowder is ongoing. Artillery gunpowder arriving from arsenals comes in bulk and bundled in bundles equipped with cap-type igniters with smoke powder. The igniters are separated from the powder beam by cutting the fastening threads with scissors.

The powder "tubes" 1 are heated in hot water with a temperature of 40-60 ^o C in the bath 2 and crushed on the Kruppa 3 machine or using a hand knife for a length of not more than 30 mm. At the same time, sensitizer oxide preparation takes place, consisting in taking samples and preparing a sensitizer suspension.

The sensitizer is zinc oxide (GOST 10262-73) or zinc white (GOST 202-84). The sensitizer suspension, in turn, is an aqueous solution with a content of zinc oxide or zinc white no more than 30%. The preparation of a suspension of the sensitizer consists in taking samples of the sensitizer and mixing it with process water at a temperature of 60-90 ^o C for at least 15 minutes. To prepare a suspension of sensitizer, you can use both of the suspension 7 (1) and 7 (2).

 The crushed powder "tubes" before rolling are passed through an electromagnetic separator 4 to catch metal objects and remove unmilled elements of more than 30 mm. If foreign objects get in, they are removed, if there are unmilled elements, they are removed manually and transferred to regrinding. Then the powder tubes are heated in the tank to heat the semi-finished product 2 and load them into the WTO 5 doser, from where they are dosed automatically to the elevator 8 and through the flame trap 9 get onto the screw conveyor 10.

Rolling of the semi-finished product is carried out on continuous rollers "Bolshevik" 11, after the output of the rotation speed of the rolls to the specified modes (temperature of the outgoing water, ^o C: from the work roll - 75-105, from the idle roll 60-90; roll rotation speed, min ^-1 - no more than 15) turn on the pump 12, open the valve on the flow line from one of the suspensions 7 (1) to supply the sensitizer suspension to the rollers. The dosage of the suspension is determined by the dosage table depending on the performance of the rolls. In the process of rolling, the suspensions work alternately (in one they prepare the suspension, from the other at the same time they spend the suspension). Rolling may be carried out with the input of the sensitizer in the form of a powder. In this case, the sensitizer is poured into the hopper of the dispenser 6.

 Next, the explosive is pressed into the screw press 13, then through the dispenser-dispenser 14, the flame cutter 15 - to be weighed on the scales 16, then in bags along the rolling table 17 to the cart 19, on which the explosive is delivered to the rack 20. The bags are sewn up help of the sewing head 18.

 Table 1 shows examples of the obtained compositions of waterproof non-explosive explosives and their detonation characteristics for the composition made without the stage of pressing (example 1), without the input stage of the sensitizer (example 2), prototype and the proposed method.

 The table shows that the composition obtained in this way has a higher sensitivity to initiating agents and detonation characteristics.

Claims (1)

A method of producing a waterproof non-safety explosive, including grinding powder elements, rolling, dosing and packaging, characterized in that when rolling into the crushed powder elements, a sensitizer is introduced in the form of a suspension or powder, which is used as metal oxides, and is pressed before dosing.

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