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Method for recycling unqualified emulsion explosive, and emulsion explosive

An emulsion explosive, qualified technology, applied in explosives, explosives processing equipment, offensive equipment, etc., can solve the problems of unsafe production process, low processing efficiency, unsafety, etc., and achieve the effect of simple recycling steps and safe preparation process

Inactive Publication Date: 2019-04-19
CHINA COAL TECH & ENG GRP HUAIBEIBLASTING TECHN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the above three types of methods, the first method is currently used by major domestic explosives factories. This method is limited to emulsion explosives that have failed but not completely hardened. At the same time, due to mixing with emulsion explosives with detonator sensitivity, the production process is extremely unsafe. , is a method not encouraged by the state. In addition, the performance of the prepared explosives is low, and it is difficult to meet the requirements of the national standard GB 28286-2012 "General Technical Conditions for Industrial Explosives"
The second type of method is limited to laboratory research, because the demulsification of explosives and the separation of oil and water phases need to be demulsified by adding a large amount of expensive demulsifiers, and then achieved by centrifugation, which has low processing efficiency and can only be used once. Disposal of unqualified emulsion explosives less than 100g; the problem of difficult separation of demulsifiers, which cannot be applied industrially
The third type of treatment method is unsafe on the one hand, and explosion accidents have occurred during the incineration process, and on the other hand, it is also a waste of resources

Method used

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  • Method for recycling unqualified emulsion explosive, and emulsion explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 500kg of unqualified emulsion explosives into an 800L silo and heat to 95°C, then transport it to the SV static mixer through a single-screw pump for intensive milking, and control the speed of the screw pump so that the residence time of the material in the static mixer reaches 2s. Then cool the finished semi-finished product to 88°C, add 0.75kg of 40% sodium nitrite solution, mix uniformly for 1min, then add 0.5kg of 40% phosphoric acid solution, mix uniformly for 1min before charging.

Embodiment 2

[0027] Add 400kg of unqualified emulsion explosives into an 800L silo and heat to 93°C, then transport it to the SV static mixer through a single-screw pump for intensive milking, and control the speed of the screw pump so that the residence time of the material in the static mixer reaches 3s. Then cool the semi-finished product after essence milk to 87°C, add 0.76kg of 40% sodium nitrite solution, mix uniformly for 1min, then add 0.51kg of 40% phosphoric acid solution, mix uniformly for 1min before charging.

Embodiment 3

[0029] Add 600kg of unqualified emulsion explosives into the 800L silo and heat it to 97°C, then transport it to the SV static mixer through a single-screw pump for fine milk, and control the speed of the screw pump so that the residence time of the material in the static mixer reaches 1.5s , then cool the semi-finished product after essence milk to 89°C, add 0.73kg of 40% sodium nitrite solution, mix uniformly for 1min, then add 0.46kg of 40% phosphoric acid solution, mix uniformly for 1min, and then charge.

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Abstract

The invention discloses a method for recycling an unqualified emulsion explosives. The method steps comprises the following steps: 1, heating the unqualified emulsion explosive in a heating containerto a flowable state, and performing heat insulation; 2, performing emulsification dispersing on a matrix obtained in step 1; and 3, sensitizing the emulsified and dispersed semi-finished product. The method directly using the unqualified emulsion explosive without detonator sensitivity as the raw material has the advantages of safe preparation process, simple recycling steps, no addition of other chemical additives, and suitableness for the completely demulsified and hardened emulsion explosive. The misunderstanding that the skilled person in the art believes that a fresh emulsifier must beadded or a new matrix must be blended during recycling of the unqualified emulsion explosive is overcome.

Description

technical field [0001] The invention relates to the field of civil explosive materials, in particular to a method based on the recycling of unqualified emulsion explosives and the emulsion explosives. Background technique [0002] Emulsion explosive is a water-in-oil latex type water-resistant industrial explosive prepared by emulsification technology. Its dispersed phase is a supersaturated solution of inorganic salt oxidant, and its continuous phase is a hydrocarbon fuel component. Due to the large difference in the content of the two phases, the unsaturation of the aqueous solution, and the high specific surface energy formed by the highly dispersed aqueous phase, the formed emulsion is a thermodynamically unstable system. In the process of production, use and storage, the phenomenon of demulsification and hardening of explosives often occurs due to the unqualified quality of raw materials used, unstable production process, and harsh use environment. The explosives no lon...

Claims

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Application Information

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IPC IPC(8): C06B21/00
CPCC06B21/00
Inventor 陈龙吴竞崔珍珍
Owner CHINA COAL TECH & ENG GRP HUAIBEIBLASTING TECHN RES INST
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