Rapid casting method for TNT explosive

Abstract

The invention discloses a rapid TNT explosive casting method which comprises the following steps: heating a TNT explosive to a molten state, putting a casting mold into a heat preservation device, arranging at least two temperature areas in the heat preservation device along the height direction of the casting mold, filling the molten TNT explosive into the casting mold for multiple times, taking out a TNT grain after the TNT explosive in the casting mold is completely solidified, and taking out the TNT grain after the TNT grain is completely solidified. According to the method, the defects in the prior art are overcome, the charge density after TNT casting can be remarkably improved, the problem that holes are prone to occurring in the TNT casting process is solved, the forming time of the improved TNT grain is shortened, and bubbles are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of explosive melting and casting, and in particular belongs to a TNT explosive rapid melting and casting method. Background Art

[0002] Nitrotoluene (TNT), also known as 2,4,6-trinitrotoluene, is an organic compound with the chemical formula C7H5N3O6. It is white or yellow needle-shaped crystals, odorless, hygroscopic, and a high explosive. Explosive casting is a charging technology currently widely used at home and abroad, mainly suitable for TNT single explosives or mixed explosives with TNT as a liquid carrier. The explosive casting process is accompanied by complex physical changes. One of the most important and most concerned changes is the change in physical state, that is, after the molten explosive is cast into the mold, the liquid explosive will gradually crystallize into a solid as the temperature decreases. This process will largely determine the quality characteristics of the explosive after casting, and thus affect the performance of the charge. For a long time, due to the complexity of TNT crystallization behavior and morphology, and the difficulty in controlling the cooling rate during TNT casting, a large number of voids are easily generated during the solidification process of TNT, resulting in various problems such as uneven density of TNT charge, unstable energy distribution during detonation, and reduced safety performance. Summary of the invention

[0003] The purpose of the invention is to provide a TNT explosive rapid melting and casting method, which overcomes the shortcomings of the prior art.

[0004] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0005] A method for rapidly melting and casting TNT explosives comprises the following steps:

[0006] S1, heating TNT explosive to a molten state, and placing the casting mold in a heat preservation device, wherein at least two temperature zones are provided in the heat preservation device along the height direction of the casting mold, and the initial heat preservation temperature of each temperature zone in the casting mold is 60°C;

[0007] S2, loading the molten TNT explosive into the casting mold for the first time, wherein the height of the loaded TNT explosive does not exceed the height of the bottom temperature zone, and the loaded TNT explosive begins to solidify, thereby reducing the temperature in the bottom temperature zone by 10-20° C.;

[0008] S3, maintaining the temperature of the temperature zone above the bottom temperature zone at 60° C., and then continuing to load the molten TNT explosive into the casting mold, the top end surface of the loaded molten TNT explosive is located in the temperature zone corresponding to the TNT explosive loaded this time;

[0009] S4, when the TNT explosive loaded in step S3 begins to solidify, the temperature of the bottom temperature area filled with TNT explosive and the temperature area above the bottom temperature area filled with TNT explosive is further reduced by 10-20°C, and then the operation in step S3 is repeated until the entire casting mold is filled with TNT explosive, and the temperature of the solidified TNT explosive in the casting mold during the entire filling process is at least 20-30°C;

[0010] S5, after the TNT explosives are loaded, the uppermost temperature zone is kept at 60°C. After the TNT explosives in the casting mold are completely solidified, the TNT column can be taken out.

[0011] The temperature at which the TNT explosive is heated to a molten state in step S1 is 80°C.

[0012] Wherein, the heat preservation device is provided with a plurality of temperature control areas, and the temperature area corresponding to each temperature control area can realize temperature control independently.

[0013] Compared with the prior art, the implementation effects of the present invention are as follows: the improved TNT melting and casting method of the present invention can significantly improve the charge density of TNT after melting and casting, overcome the problem that holes are prone to appear during the TNT melting and casting process, shorten the TNT column molding time after the improvement, greatly reduce bubbles, and can realize the melting and casting of large columns by layered casting, thereby improving the detonation energy and safety performance of the TNT column, and the improved method is simple and easy to operate, which is conducive to the promotion of military and civilian TNT explosive melting and casting methods and reduces explosive loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the heat preservation device of Example 1 of the present invention.

[0015] Figure 2 This is a schematic structural diagram of the heat preservation device of Example 2 of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The heat preservation device used in the present invention is a circulating water bath heat preservation device, each temperature control area is controlled separately, and each temperature control area corresponds to a temperature zone.

[0020] Example 1

[0021] like Figure 1 As shown, the TNT explosive rapid melting and casting method of the present invention is: first, the TNT explosive is heated to a molten state of 80°C, and the melting and casting mold is placed in a heat preservation device, in which two temperature zones are arranged along the height direction of the melting and casting mold, and in which there are two temperature control zones corresponding to the temperature zones, and the temperature zone corresponding to each temperature control zone can realize temperature control independently. Before the TNT explosive is loaded, the temperature of the first temperature zone and the second temperature zone is 60°C.

[0022] Then, the molten TNT explosive is loaded into the casting mold, and the height of the loaded TNT explosive is close to the junction of the first temperature zone and the second temperature zone, and does not exceed the range of the first temperature zone; when the TNT explosive loaded this time begins to solidify, the temperature in the first temperature zone is set to 50°C.

[0023] Next, the temperature of the second temperature zone is maintained at 60°C, and then molten TNT explosives are continuously loaded into the casting mold, with the top end surface of the loaded molten TNT explosives being located within the second temperature zone. At this time, the loading is completed, and the second temperature zone is maintained at 60°C. After the TNT explosives loaded this time are completely solidified, the heat preservation device stops working and the TNT column can be taken out.

[0024] Example 2

[0025] like Figure 2As shown, the TNT explosive rapid melting and casting method of the present invention is: first, the TNT explosive is heated to a molten state of 80°C, and the melting and casting mold is placed in a heat preservation device, and six temperature zones are arranged in the heat preservation device along the height direction of the melting and casting mold, and there are six temperature control zones in the heat preservation device, and the temperature control zone corresponding to each temperature zone can realize temperature control independently. Before the TNT explosive is loaded, the temperature of the six temperature zones is 60°C.

[0026] Then, the molten TNT explosive is loaded into the casting mold, and the height of the loaded TNT explosive is close to the junction of the first temperature zone and the second temperature zone, and does not exceed the range of the first temperature zone; when the TNT explosive loaded this time begins to solidify, the temperature in the first temperature zone is set to 50° C., and the temperatures of the second, third, fourth, fifth, and sixth temperature zones are maintained at 60° C.;

[0027] Next, the molten TNT explosive is continuously loaded into the casting mold, and the top end surface of the loaded molten TNT explosive is located in the second temperature zone. At this time, the loading is completed. After the TNT explosive loaded this time begins to solidify, the temperature in the first temperature zone is set to 40° C., the temperature in the second temperature zone is set to 50° C., and the temperature in the third, fourth, fifth, and sixth temperature zones is maintained at 60° C.;

[0028] Then, the molten TNT explosive is continuously loaded into the casting mold, and the top end surface of the loaded molten TNT explosive is located in the third temperature zone. When the loaded TNT explosive begins to solidify, the temperature in the first temperature zone is set to 30° C., the temperature in the second temperature zone is set to 40° C., the temperature in the third temperature zone is set to 50° C., and the temperature in the fourth, fifth, and sixth temperature zones is maintained at 60° C.;

[0029] Then, the molten TNT explosive is continuously loaded into the casting mold, and the top end surface of the loaded molten TNT explosive is located in the fourth temperature zone. When the loaded TNT explosive begins to solidify, the temperature in the first temperature zone is set to 20° C., the temperature in the second temperature zone is set to 30° C., the temperature in the third temperature zone is set to 40° C., the temperature in the fourth temperature zone is set to 50° C., and the temperature in the fifth and sixth temperature zones is maintained at 60° C.;

[0030] Next, continue to load the molten TNT explosive into the casting mold, the top end surface of the loaded molten TNT explosive is located in the fifth temperature zone, and when the TNT explosive loaded this time begins to solidify, the temperature in the first temperature zone is set to 20° C., the temperature in the second temperature zone is set to 20° C., the temperature in the third temperature zone is set to 30° C., the temperature in the fourth temperature zone is set to 40° C., the temperature in the fifth temperature zone is set to 50° C., and the temperature in the sixth temperature zone is maintained at 60° C.;

[0031] Finally, molten TNT explosive is loaded into the casting mold, and the top end surface of the molten TNT explosive is located in the sixth temperature zone. At this time, the loading is completed, and the temperature of the sixth temperature zone is maintained at 60°C. After the TNT explosive in the casting mold is completely solidified, the insulation device stops working and the TNT column can be taken out.

[0032] Example 3

[0033] The difference between this embodiment and embodiment 2 is that the temperature of the solidified TNT explosive in the casting mold is at least 30° C. during the whole process.

[0034] Example 4

[0035] The difference between this embodiment and embodiment 2 is that the temperature of the temperature zone filled with molten TNT explosive drops by 20°C each time, and the temperature of the solidified TNT explosive in the casting mold is at least 30°C during the whole process.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for rapid melting and casting of TNT explosives, characterized in that: The following steps are involved: S1, heating TNT explosive to a molten state, and placing the casting mold in a heat preservation device, wherein at least two temperature zones are provided in the heat preservation device along the height direction of the casting mold, and the initial heat preservation temperature of each temperature zone in the casting mold is 60°C; S2, loading the molten TNT explosive into the casting mold for the first time, wherein the height of the loaded TNT explosive does not exceed the height of the bottom temperature zone, and the loaded TNT explosive begins to solidify, thereby reducing the temperature in the bottom temperature zone by 10-20° C.; S3, maintaining the temperature of the temperature zone above the bottom temperature zone at 60° C., and then continuing to load the molten TNT explosive into the casting mold, the top end surface of the loaded molten TNT explosive is located in the temperature zone corresponding to the TNT explosive loaded this time; S4, when the TNT explosive loaded in step S3 begins to solidify, the temperature of the bottom temperature area filled with TNT explosive and the temperature area above the bottom temperature area filled with TNT explosive is further reduced by 10-20°C, and then the operation in step S3 is repeated until the entire casting mold is filled with TNT explosive, and the temperature of the solidified TNT explosive in the casting mold during the entire filling process is at least 20-30°C; S5, after the TNT explosives are loaded, the uppermost temperature zone is kept at 60°C. After the TNT explosives in the casting mold are completely solidified, the TNT column can be taken out.

2. A TNT explosive rapid melting and casting method according to claim 1, characterized in that: In step S1, the temperature of heating the TNT explosive to a molten state is 80°C.

3. The method for rapid melting and casting of TNT explosive according to claim 1, characterized in that: The heat preservation device is provided with a plurality of temperature control areas, and the temperature area corresponding to each temperature control area can realize temperature control independently.

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