Low-sensitivity explosive processing special explosive and preparation method thereof

Abstract

The invention relates to the technical field of explosives, and discloses a low-sensitivity explosive processing special explosive and a preparation method thereof, and the low-sensitivity explosive processing special explosive comprises the following components in parts by weight: 50-90 parts of a main explosive, 10-40 parts of a binder, 0-25 parts of a detonation velocity regulator and 5-10 parts of a sensitizer. The preparation method of the low-sensitivity explosive processing special explosive comprises the following steps: respectively adding the main explosive, the binder and the detonation velocity regulator into a stirring device according to preset weight parts, stirring at a first preset stirring speed for a first preset time, and uniformly mixing; adding the sensitizer into the stirring device according to a preset weight part, stirring for a second preset time by the stirring device at a second preset stirring speed, and uniformly mixing; after uniformly stirring, pouring the mixture into a mold through a feed opening of the stirring device, and drying and shaping at a first preset temperature; and taking out from the mold after shaping, continuously drying at the second preset temperature for a third preset time, and then carrying out extrusion forming. And the safety of production, transportation and operation is higher.

Description

Technical Field

[0001] The invention relates to the technical field of explosive articles, and in particular to a low-sensitivity explosion-processing special explosive and a preparation method thereof. Background Art

[0002] Explosive processing technology uses explosives as energy and utilizes the instantaneous high temperature and high pressure generated by the explosion of explosives to modify, optimize, shape design, and synthesize plastic metals, ceramics, powders, and other materials. Since explosive explosion is a fast process, compared with conventional processing methods such as hydraulics and stamping, explosive processing has the characteristics of high pressure, high deformation speed, short processing time, and thus high power. Therefore, explosive processing is a high-energy processing method. The main components of existing special explosives for explosive processing are highly sensitive explosives such as RDX, Taian, and Octogen. Special explosives for explosive processing will have a certain impact sensitivity and friction sensitivity, and there are certain risks in production, transportation, and operation. Summary of the invention

[0003] Based on the above, the purpose of the present invention is to provide a low-sensitivity special explosive for explosive processing and a preparation method, so as to solve the problem of high impact sensitivity and friction sensitivity of the special explosive for explosive processing, and to improve the safety of production, transportation and operation.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A low-sensitivity special explosive for explosive processing comprises the following components by weight: 50-90 parts of a main explosive, 10-40 parts of a binder, 0-25 parts of a detonation velocity regulator and 5-10 parts of a sensitivity reducing agent.

[0006] As a preferred embodiment of a low-sensitivity special explosive for explosive processing, the main explosive comprises one or more of Tai'an, RDX, and Octogen, the binder comprises one or more of natural latex, polyisobutylene, carboxylic acid ester, phosphate ester, epoxy resin, and emulsified matrix, the detonation velocity regulator comprises one or more of silicon dioxide, sulfur, zinc oxide, and red lead, and the sensitivity reducing agent comprises one or more of mica powder, titanium dioxide, and barium sulfate.

[0007] A method for preparing a low-sensitivity explosive processing special explosive comprises the following steps:

[0008] S1: adding the main explosive agent, the binder and the detonation velocity regulator respectively in preset weight portions into a stirring device and stirring at a first preset stirring speed for a first preset time to mix them uniformly;

[0009] S2: adding the susceptibility reducing agent according to a preset weight portion into the stirring device, and stirring the stirring device at a second preset stirring speed for a second preset time to mix uniformly;

[0010] S3: After being stirred evenly, pour the mixture into the mold through the feeding port of the stirring device and dry and shape the mixture at a first preset temperature;

[0011] S4: After the shaping is completed, the product is taken out from the mold, and is dried at the second preset temperature for a third preset time, and then extruded into shape.

[0012] As a preferred solution of the method for preparing low-sensitivity explosive processing special explosive, in the step S1, the liquid material and the solid material in the main explosive, the binder and the detonation velocity regulator are firstly mixed separately and evenly, and then the mixed liquid material and the mixed solid material are added into the stirring device for stirring and mixing.

[0013] As a preferred solution for the preparation method of low-sensitivity explosion-processing special explosives, the first preset stirring speed range is 60r / min-100r / min, the first preset time range is 3-5min, the second preset stirring speed range is 30r / min-60r / min, and the second preset time range is 2-3min.

[0014] As a preferred solution of the method for preparing low-sensitivity explosion-processing special explosives, the first preset temperature range is 55-65°C; the second preset temperature range is 75-85°C.

[0015] As a preferred solution for the method for preparing a low-sensitivity explosion-processing special explosive, the third preset time range is 8-10 hours.

[0016] The beneficial effects of the present invention are:

[0017] The invention provides a low-sensitivity special explosive for explosive processing, which has low friction sensitivity and impact sensitivity and high intrinsic safety during production, transportation and blasting construction.

[0018] The present invention also provides a method for preparing a low-sensitivity special explosive for explosive processing. The prepared low-sensitivity special explosive for explosive processing has lower friction sensitivity and impact sensitivity, and at the same time ensures that the prepared low-sensitivity special explosive for explosive processing has good detonation speed and intensity, that is, the prepared low-sensitivity special explosive for explosive processing has better practicality and higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1 The present invention provides a flowchart of a method for preparing a low-sensitivity explosive processing special explosive. DETAILED DESCRIPTION

[0021] For ease of understanding of the present invention, the present invention will be described more fully below. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Unless otherwise defined, all technical and scientific terms used in the present invention belong to the technical field of the present invention.

[0022] This embodiment provides a method for preparing a low-sensitivity explosive processing special explosive, which specifically includes the following steps:

[0023] S1: adding the main explosive agent, the binder and the detonation velocity regulator respectively according to preset weight portions into a stirring device and stirring at a first preset stirring speed for a first preset time to mix them uniformly;

[0024] Among them, the main explosive includes one or more of Tai'an, RDX, and Octogen, which have good physical and chemical stability, excellent and stable explosion performance, high detonation sensitivity and small critical diameter, and can transmit explosions over small cross-sections and long distances.

[0025] The binder includes one or more of natural latex, polyisobutylene, carboxylate, phosphate, epoxy resin and emulsified matrix. The binder can bind the loose main explosive and other components together, making them adhere to each other, thereby ensuring that the components have sufficient strength and flexibility after mixing.

[0026] Among them, the detonation velocity regulator includes one or more of silicon dioxide, sulfur, zinc oxide, and red lead. The thermal effect of the detonation velocity regulator when participating in the reaction is small, and the bulk density is also small, which can form uniform and small gaps in the prepared low-sensitivity explosion processing special explosives, reduce the density of the explosives, and achieve the effect of reducing the detonation velocity.

[0027] In this embodiment, the first preset stirring speed range is 60r / min-100r / min, for example, the first preset stirring speed is 60r / min, 70r / min, 80r / min, 90r / min, 100r / min, etc., which is set according to actual needs; the first preset time range is 3-5min, for example, the first preset time is 3min, 4min, 5min, etc.

[0028] Preferably, the liquid materials and solid materials in the main explosive agent, the binder and the detonation velocity regulator are first mixed separately and evenly, and then the mixed liquid materials and the mixed solid materials are added to the stirring device for stirring and mixing. The liquid materials are mixed first and the solid materials are mixed first, so that all materials can be fully mixed and each material is mixed evenly.

[0029] S2: adding the susceptibility reducing agent according to a preset weight portion into the stirring device, and stirring the stirring device at a second preset stirring speed for a second preset time to mix uniformly;

[0030] Among them, the second preset stirring speed range is 30r / min-60r / min, for example, the second preset stirring speed is 30r / min, 40r / min, 50r / min or 60r / min; the second preset time range is 2-3min, for example, the second preset time is 2min, 2.5min or 3min.

[0031] The desensitizing agent includes one or more of mica powder, titanium dioxide, and barium sulfate.

[0032] In this embodiment, by weight, 50-90 parts of the main explosive, 10-40 parts of the binder, and 0-25 parts of the detonation velocity regulator are first stirred evenly, and then 5-10 parts of the desensitizer are added and stirred evenly again, for example, 50 parts, 60 parts, 70 parts, 80 parts or 90 parts of the main explosive are added, 10 parts, 20 parts, 30 parts or 40 parts of the binder are added, the detonation velocity regulator is not added or 1 part, 10 parts, 20 parts or 25 parts are added, and the desensitizer is added 5 parts, 8 parts or 10 parts. By mixing the main explosive, the binder and the detonation velocity regulator first and then adding the desensitizer to mix, the friction sensitivity and impact sensitivity of the low-sensitivity special explosive for explosive processing can be further reduced.

[0033] S3: After being stirred evenly, pour the mixture into the mold through the feeding port of the stirring device and dry and shape the mixture at a first preset temperature;

[0034] The first preset temperature range is 55-65°C, for example, the first preset temperature is 55°C, 60°C or 65°C.

[0035] S4: After the shaping is completed, the product is taken out from the mold, and is dried at the second preset temperature for a third preset time, and then extruded into shape.

[0036] Among them, the second preset temperature range is 75-85°C, for example, the second preset temperature is 75°C, 80°C or 85°C; the third preset time range is 8-10h, for example, the third preset time is 8h, 9h or 10h.

[0037] After drying and extrusion molding, the final low-sensitivity explosion-processed special explosive product is obtained, and then the finished product can be packaged and stored.

[0038] That is, through the above steps, a low-sensitivity special explosive for explosive processing is prepared, which comprises the following components by weight: 50-90 parts of main explosive, 10-40 parts of binder, 0-25 parts of detonation velocity regulator and 5-10 parts of sensitivity reducing agent.

[0039] Among them, the main explosive agent includes one or more of Tai'an, RDX, and Octogen, the binder includes one or more of natural latex, polyisobutylene, carboxylic acid ester, phosphate ester, epoxy resin, and emulsified matrix, the detonation velocity regulator includes one or more of silicon dioxide, sulfur, zinc oxide, and red lead, and the sensitivity reducing agent includes one or more of mica powder, titanium dioxide, and barium sulfate.

[0040] The present invention will be further described below by means of specific examples.

[0041] Example 1

[0042] First add 20 parts of carboxylic acid ester and 75 parts of RDX into a stirring device and stir evenly, then add 5 parts of mica powder and stir evenly again. After mixing evenly, pour into the mold through the discharge port of the stirring device, dry and shape at 60°C, take out from the mold after shaping, continue to dry at 80°C for 9 hours, and then extrude to form a low-sensitivity special explosive for explosion processing.

[0043] Example 2

[0044] Add 25 parts of natural latex and 65 parts of Taian into a stirring device and stir evenly, then add 10 parts of titanium dioxide and stir evenly again. After mixing evenly, pour them into the mold through the discharge port of the stirring device, dry and shape them at 60°C, take them out of the mold after shaping, continue to dry them at 80°C for 9 hours, and then extrude them to form a low-sensitivity special explosive for explosion processing.

[0045] Example 3

[0046] Add 80 parts of RDX and 5 parts of silicon dioxide into a stirring device and mix evenly, then add 10 parts of polyisobutylene and mix evenly, then add 5 parts of barium sulfate and mix evenly again. After mixing evenly, pour it into the mold through the discharge port of the stirring device, dry and shape it at 60°C, take it out from the mold after shaping, continue to dry it at 80°C for 9 hours, and then extrude it to obtain a low-sensitivity special explosive for explosion processing.

[0047] Example 4

[0048] Add 70 parts of RDX and 5 parts of zinc oxide into a stirring device and mix evenly, then add 15 parts of polyisobutylene and mix evenly, then add 10 parts of barium sulfate and mix evenly again. After mixing evenly, pour it into the mold through the discharge port of the stirring device, dry and shape it at 60°C, take it out from the mold after shaping, continue to dry it at 80°C for 9 hours, and then extrude it to obtain a low-sensitivity special explosive for explosion processing.

[0049] Example 5

[0050] Add 65 parts of RDX and 7 parts of zinc oxide into a stirring device and mix evenly, then add 15 parts of polyisobutylene and mix evenly, then add 8 parts of barium sulfate and mix evenly again. After mixing evenly, pour it into the mold through the discharge port of the stirring device, dry and shape it at 60°C, take it out from the mold after shaping, continue to dry it at 80°C for 9 hours, and then extrude it to obtain a low-sensitivity special explosive for explosion processing.

[0051] In order to further illustrate the key points of this patent, a comparative case is added for illustration.

[0052] Comparative Example 1

[0053] 75 parts of RDX and 20 parts of carboxylic acid ester are added into a stirring device and stirred evenly. After being evenly mixed, they are poured into a mold through a discharge port of the stirring device, dried and shaped at 60°C, taken out from the mold after shaping, and continued to be dried at 80°C for 9 hours, and then extruded to obtain a finished product.

[0054] Comparative Example 2

[0055] Add 65 parts of Taian and 35 parts of natural latex into a stirring device and stir evenly. After mixing evenly, pour them into the mold through the discharge port of the stirring device, dry and shape them at 60°C, take them out of the mold after shaping, continue to dry them at 80°C for 9 hours, and then extrude them to obtain the finished product.

[0056] Comparative Example 3

[0057] First add 80 parts of RDX and 10 parts of silicon dioxide into a stirring device and mix evenly, then add 10 parts of polyisobutylene and mix evenly. After mixing evenly, pour it into a mold through the discharge port of the stirring device, dry and shape it at 60°C, take it out from the mold after shaping, continue to dry it at 80°C for 9 hours, and then extrude it to obtain the finished product.

[0058] Comparative Example 4

[0059] 70 parts of RDX and 13 parts of silicon dioxide are first added to a stirring device and mixed evenly, then 15 parts of polyisobutylene are added and stirred evenly, and then 2 parts of barium sulfate are added and stirred evenly again. After mixing evenly, pour it into a mold through the discharge port of the stirring device, dry and shape it at 60°C, take it out from the mold after shaping, continue to dry it at 80°C for 9 hours, and then extrude it to obtain the finished product.

[0060] Comparative Example 5

[0061] First add 65 parts of RDX and 10 parts of silicon dioxide into a stirring device and mix evenly, then add 10 parts of polyisobutylene and mix evenly, then add 15 parts of barium sulfate and mix evenly again. After mixing evenly, pour it into a mold through the discharge port of the stirring device, dry and shape it at 60°C, take it out from the mold after shaping, continue to dry it at 80°C for 9 hours, and then extrude it to obtain the finished product.

[0062] The low-sensitivity explosive processing special explosives prepared in the above five embodiments and the finished products prepared in the five comparative examples were tested for detonation velocity, force, impact sensitivity and friction sensitivity. The detonation velocity detection method was based on GB / T13228-2015, the explosive force was based on GB / T 12440, the impact sensitivity detection method was based on GB / T21567-2008, and the friction sensitivity detection method was based on GB / T21566-2008. The test results are as follows:

[0063]

[0064]

[0065] It can be seen from this that the impact sensitivity and friction sensitivity of the low-sensitivity special explosive for explosive processing can be effectively reduced by adding a sensitivity reducing agent, while ensuring the detonation speed and intensity of the low-sensitivity special explosive for explosive processing.

[0066] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A low-sensitivity explosive for explosive processing, characterized in that: The invention comprises the following components in parts by weight: 50-90 parts of a main explosive agent, 10-40 parts of a binder, 0-25 parts of a detonation velocity regulator and 5-10 parts of a sensitivity reducing agent.

2. The low-sensitivity explosive for explosive processing according to claim 1, characterized in that: The main explosive agent includes one or more of Tai'an, RDX, and Octogen; the binder includes one or more of natural latex, polyisobutylene, carboxylic acid ester, phosphate ester, epoxy resin, and emulsified matrix; the detonation velocity regulator includes one or more of silicon dioxide, sulfur, zinc oxide, and red lead; and the sensitivity reducing agent includes one or more of mica powder, titanium dioxide, and barium sulfate.

3. The method for preparing the low-sensitivity explosive processing special explosive according to claim 1, characterized in that: The following steps are involved: S1: adding the main explosive agent, the binder and the detonation velocity regulator respectively in preset weight portions into a stirring device and stirring at a first preset stirring speed for a first preset time to mix them uniformly; S2: adding the susceptibility reducing agent according to a preset weight portion into the stirring device, and stirring the stirring device at a second preset stirring speed for a second preset time to mix uniformly; S3: After being stirred evenly, pour the mixture into the mold through the feeding port of the stirring device and dry and shape the mixture at a first preset temperature; S4: After the shaping is completed, the product is taken out from the mold, and is dried at the second preset temperature for a third preset time, and then extruded into shape.

4. The method for preparing the low-sensitivity explosive processing special explosive according to claim 3, characterized in that: In the step S1, the liquid materials and solid materials in the primary explosive agent, the binder and the detonation velocity regulator are firstly mixed separately and evenly, and then the mixed liquid materials and the mixed solid materials are added into the stirring device for stirring and mixing.

5. The method for preparing the low-sensitivity explosive processing special explosive according to claim 3, characterized in that: The first preset stirring speed range is 60r / min-100r / min, the first preset time range is 3-5min, the second preset stirring speed range is 30r / min-60r / min, and the second preset time range is 2-3min.

6. The method for preparing the low-sensitivity explosive processing special explosive according to claim 3, characterized in that: The first preset temperature range is 55-65°C; the second preset temperature range is 75-85°C.

7. The method for preparing low-sensitivity explosive processing special explosive according to claim 3, characterized in that: The third preset time range is 8-10 hours.

Images