Thermit and preparation method thereof

A combustion agent and thermite technology, applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the problems of hindering heat transfer, inability to cut non-metallic materials, etc., and achieve high ignition reliability, moderate burning speed, and gunshot sensitivity low effect

Inactive Publication Date: 2013-02-13
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the cutting ability of common thermite such as thermite thermal energy cutters cannot be compared with arc cutting torches and oxygen cutting torches, and the liquid slag in the combustion products of thermite will wrap or block Cutting the surface of the material hinders further heat transfer, so thermite-based pyrotechnics cannot be used in applications such as drilling, nor can they cut non-metallic materials such as concrete, granite, ceramics, etc. Therefore, pyrotechnics should be controlled The amount of liquid slag in the combustion product of the drug is at a low level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An thermite combustion agent, which comprises the following components in parts by weight: 20 parts of Al powder, 80 parts of manganese dioxide powder, and 5 parts of magnesium powder.

[0027] A method for preparing the above thermite combustion agent, the method includes the following steps:

[0028] (1) Weighing: Weigh the raw materials of each component in parts by weight;

[0029] (2) Drying: Put each medicine separately in a drying box for drying. When drying, spread the medicines evenly. The thickness of the stack should not exceed 25mm, and the drying temperature should not exceed 50℃. If a vacuum drying box is used for drying, it will be dried at one time. The amount of medicine should not exceed 500g;

[0030] (3) Dry mixing: When mixing, first mix aluminum powder and magnesium powder, then mix barium nitrate and manganese dioxide, and finally mix the above two mixtures evenly. It can be mixed with a mixer or manual hand. For mixing, the mixing time of each medicine ...

Embodiment 2

[0033] An thermite combustion agent, which comprises the following components in parts by weight: 30 parts of Al powder, 70 parts of manganese dioxide powder, and 10 parts of nickel powder.

[0034] A method for preparing the above thermite combustion agent, the method includes the following steps:

[0035] (1) Weighing: Weigh the raw materials of each component in parts by weight;

[0036] (2) Drying: Put each medicine separately in a drying box for drying. When drying, spread the medicines evenly. The thickness of the stack should not exceed 25mm, and the drying temperature should not exceed 50℃. If a vacuum drying box is used for drying, it will be dried at one time. The amount of medicine should not exceed 500g;

[0037] (3) Dry mixing: When mixing, first mix aluminum powder and magnesium powder, then mix barium nitrate and manganese dioxide, and finally mix the above two mixtures evenly. It can be mixed with a mixer or manual hand. For mixing, the mixing time of each medicine sh...

Embodiment 3

[0040] An thermite combustion agent, which comprises the following components in parts by weight: 23 parts of Al powder, 78 parts of manganese dioxide powder, and 7 parts of barium nitrate.

[0041] A method for preparing the above thermite combustion agent, the method includes the following steps:

[0042] (1) Weighing: Weigh the raw materials of each component in parts by weight;

[0043] (2) Drying: Put each medicine separately into a drying box for drying. When drying, spread the medicines evenly. The thickness of the stack should not exceed 25mm, and the drying temperature should not exceed 50℃. If a vacuum drying box is used for drying, it will be dried at one time. The amount of medicine should not exceed 500g;

[0044] (3) Dry mixing: When mixing, first mix aluminum powder and magnesium powder, then mix barium nitrate and manganese dioxide, and finally mix the above two mixtures evenly. It can be mixed with a mixer or manual hand. For mixing, the mixing time of each medicine ...

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Abstract

The invention discloses thermit and a preparation method thereof. The thermit comprises, by weight, 20-30 parts of Al powder, 70-80 parts of manganese dioxide and 5-10 parts of additives. The additives comprise one or combination of more of magnesium powder, nickel powder, nitrate barium and polytetrafluoroethene. The preparation method includes a series of steps of drying and dry-blending components and making grain and the like. The thermit is good in thermal stability, low in mechanical sensitivity and sensitivity of rifle bullet impact, good in integral security, high in ignition reliability, stable in burning process and appropriate in burning speed. Heat released by burning and produced high-temperature slag are concentrated in flame jet flow, and only a small amount of liquid slag is produced.

Description

Technical field [0001] The invention relates to a combustion agent and a preparation method thereof, in particular to a thermite combustion agent which is particularly suitable for high-temperature cutting and drilling and a preparation method thereof. Background technique [0002] The thermite combustion reaction was originally only defined as the reaction between metallic aluminum and ferroferric oxide. With the deepening of research on the reaction of metals and metal oxides, it has been expanded to represent the oxidation of metal fuels and metals or non-metals. The type of oxidation-reduction reaction between substances is called the generalized thermite abroad. [0003] The thermite is a high-energy-density agent, and a small volume of the drug can also provide strong chemical heat. Therefore, the thermite-type thermal energy cutter is very light and can be carried by one person, which is very suitable for emergency use in the field. In the military, it is especially sui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/18
Inventor 丁文郭涛方向刘强齐世福毛益明李裕春刘涛谢全民纪冲刘建青李德林王树民
Owner PLA UNIV OF SCI & TECH
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