Explosive recrystallization preparation method and device for explosive crystallization

A technology of recrystallization and explosives, applied in explosives processing equipment, explosives, offensive equipment and other directions, can solve the problems of low recrystallization efficiency of explosives, poor quality consistency, etc., to solve the problem of production bottleneck, reduce impact sensitivity, and accurately control temperature and temperature. The effect of evaporation rate

Inactive Publication Date: 2017-05-24
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention designs a control method for improving the quality and efficiency of recrystallization of propellants and explosives, and realizes the high-efficiency preparation and obtaining of explosive crystals with high quality consistency under the condition that the ambient temperature of recrystallization preparation of propellants and explosives in this field is lower than 10°C. Effectively solve the bottleneck problem of low explosive recrystallization efficiency and poor quality consistency in this field

Method used

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  • Explosive recrystallization preparation method and device for explosive crystallization
  • Explosive recrystallization preparation method and device for explosive crystallization
  • Explosive recrystallization preparation method and device for explosive crystallization

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) The explosive is completely dissolved in an acetone solvent to obtain the explosive stock solution;

[0036] (2) Pour the explosive stock solution into the grid crystallization tray, then put the grid crystallization tray into the precision constant temperature heating water tank, raise the temperature of the precision constant temperature heating water tank to 60°C and keep the constant temperature;

[0037] (3) Turn on the top ventilation system located directly above the grid crystallization plate to continuously draw air upwards, and keep the ventilation speed stable at 0.75m / s. During this process, the solvent evaporates continuously and the explosive crystallizes continuously until all the solvent evaporates and the explosive crystallizes completely So far, the qualified rate of crystal is 98.5%.

Embodiment 2

[0039] (1) The explosive is completely dissolved in an acetone solvent to obtain the explosive stock solution;

[0040] (2) Pour the explosive stock solution into the grid crystallization tray, then put the grid crystallization tray into the precision constant temperature heating water tank, raise the temperature of the precision constant temperature heating water tank to 59°C and keep the constant temperature;

[0041] (3) Turn on the top ventilation system located directly above the grid crystallization tray to continuously draw air upwards, and keep the ventilation speed stable at 0.77m / s. During this process, the solvent evaporates continuously and the explosive crystallizes continuously until all the solvent evaporates and the explosive crystallizes completely So far, the qualified rate of crystal is 98%.

Embodiment 3

[0043] (1) The explosive is completely dissolved in an acetone solvent to obtain the explosive stock solution;

[0044] (2) Pour the explosive stock solution into the grid crystallization tray, then put the grid crystallization tray into the precision constant temperature heating water tank, raise the temperature of the precision constant temperature heating water tank to 61°C and keep the constant temperature;

[0045] (3) Turn on the top ventilation system located directly above the grid crystallization tray to continuously draw air upwards, and keep the ventilation speed stable at 0.73m / s. During this process, the solvent evaporates continuously and the explosive crystallizes continuously until all the solvent evaporates and the explosive crystallizes completely So far, the qualified rate of crystal is 98%.

[0046]According to the test method of GJB772A-97 (601.1), the recrystallized explosive of the present invention was tested for impact sensitivity. In the experiment, ...

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Abstract

The invention discloses an explosive recrystallization preparation method and a device for explosive crystallization. An explosive stock solution is poured into a grille crystallizing pan, and then the grille crystallizing pan is placed in a precise constant-temperature heating water tank, heated to 59-61 DEG C and kept at the constant temperature; a top-end air suction system is started, and the air suction speed is stabilized at 0.73-0.77 m/s, so that all explosives are crystallized. The device for explosive crystallization comprises the precise constant-temperature heating water tank, the grille crystallizing pan and the top-end air suction system, wherein the grille crystallizing pan is placed in constant-temperature water in the precise constant-temperature heating water tank, so that the periphery and the bottom of the grille crystallizing pan can be heated by the constant-temperature water, the top-end air suction system is arranged right above the grille crystallizing pan, and a grille of the grille crystallizing pan is arranged on the inner bottom surface of the grille crystallizing pan. The method and the device have a function of precisely controlling the temperature and the volatilization speed of the recrystallized stock solution, the initiation sensitivity of prepared explosives is obviously improved, the shock sensitivity is greatly reduced, and the production efficiency is substantially improved.

Description

technical field [0001] The invention relates to the technical field of explosives, and more specifically, the invention relates to a method for preparing explosive recrystallization and a device for explosive crystallization. Background technique [0002] In the field of propellants and explosives, in order to improve the sensitivity and detonation consistency of explosives, recrystallization, washing, crushing, milling, baking and other processes are required before use. The recrystallization process is a key process that affects product performance. In order to obtain more qualified crystals in the preparation process, the preparation time and temperature are usually required to be operated in summer or in an environment where the ambient temperature is greater than 28°C. In autumn and winter, the preparation environment is difficult to meet the conditions of ≥28°C, and about 70% of the crystal shapes of the prepared explosives are unqualified, which greatly restricts the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B21/00
CPCC06B21/00
Inventor 张海斌李振锋任钢姚伟张波许冰何宇鹏王静
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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