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Anticaking agent for powdery emulsion explosive and preparation method thereof

A technology of powder emulsion explosive and anti-caking agent, which is applied in non-explosive/non-thermal agent components, explosives, offensive equipment, etc. The effect of tight bonding, complete explosion reaction, preventing recrystallization

Active Publication Date: 2016-08-24
SHANXI TOND CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large specific surface area and high oil absorption rate of silica, after contacting with powdery emulsion explosives, part of the oil phase will be absorbed, resulting in incomplete explosive reaction and reduced explosive performance.
The amount of silicon dioxide added is less than 0.5%, which cannot prevent the agglomeration of explosives. If the amount is greater than 0.5%, the explosive performance of the explosive will drop rapidly, which cannot meet the requirements of the WJ9025-2004 "Powder Emulsion Explosives" standard.
Therefore, pure silica additives are not suitable for use in powdered emulsion explosives
In addition, pure silica additives only cover powdery emulsion explosives and cannot prevent the recrystallization of ammonium nitrate crystals

Method used

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  • Anticaking agent for powdery emulsion explosive and preparation method thereof
  • Anticaking agent for powdery emulsion explosive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 180kg of 6mol / L sulfuric acid solution to the reaction kettle, raise the temperature to 90°C, and gradually add 400kg of 2mol / L sodium silicate solution under stirring. After all the sodium silicate solution is added, continue to stir and react for 28 minutes, then stop stirring. Let stand for 40 minutes.

[0020] Preheat the spray drying system for about 30 minutes. After the outlet temperature of the blower reaches 135-145°C, stir and beat the reacted slurry, start the screw pump, and control the delivery pressure of the screw pump within 0.45MPa. Under temperature conditions, the slurry is transported to the tower for atomization, dehydrated and dried to make powder, and packed into bags of anti-caking agent of 10-25kg per bag.

[0021] Take 1.5kg of anti-caking agent and add it to 300kg of powdered emulsion explosive, pack it into a large bag of 40kg / bag, stack it for storage, and it will not agglomerate after 6 months. 3 m / s.

Embodiment 2

[0023] Add 172kg of 6mol / L sulfuric acid solution to the reaction kettle, raise the temperature to 95°C, gradually add 390kg of 2mol / L sodium silicate solution under stirring, after all the sodium silicate solution is added, continue to stir and react for 30 minutes, stop stirring, Let stand for 50 minutes.

[0024] Preheat the spray drying system for about 30 minutes. After the outlet temperature of the blower reaches 135-145°C, stir and beat the reacted slurry, start the screw pump, and control the delivery pressure of the screw pump within 0.3MPa. Under temperature conditions, the slurry is transported to the tower for atomization, dehydrated and dried to make powder, and packed into bags of anti-caking agent of 10-25kg per bag.

[0025] Take 3kg of anti-caking agent and add it to 300kg of powdered emulsion explosive, pack it into a large bag of 40kg / bag, stack it for storage, and it will not agglomerate after 6 months. 3 m / s.

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Abstract

The invention discloses an anti-blocking agent for powdery emulsion explosives. The anti-blocking agent is a mixed product obtained by reacting 0.85-0.95 part by weight of 6mol / L sulfuric acid solution with 1.95-2.5 parts by weight of a 2mol / L sodium silicate solution at 89-95 DEG C and then drying. The anti-blocking agent for the powdery emulsion explosives is a mixture containing silicon dioxide, sulfate and silicate substances; as long as the anti-blocking agent is added to the powdery emulsion explosives, the powdery emulsion explosives can be prevented from blocking due to pressure or moisture absorption during storage; meanwhile, the various performance indexes of the powdery emulsion explosives all conforms to the requirements of the national standards WJ9025-2004 powdery Emulsion Explosives; in other words, the anti-blocking agent has no any influence on the safety performance of the explosives.

Description

technical field [0001] The invention belongs to the technical field of anti-caking of industrial explosives, in particular to an anti-caking agent for preventing the agglomeration of powdery emulsion explosives, and a preparation method of the anti-caking agent. Background technique [0002] Powdery emulsion explosive belongs to a kind of high-power powdery explosive, which is favored by people for its excellent explosive performance. However, the caking property of powdery emulsion explosives has always been a bottleneck in the technical field of powdery emulsion explosives. Especially after the powdery emulsion explosives are packed into large packages, during the period of stockpiling, due to the heavy pressure, the large packages piled on the bottom will harden in less than a week, and the whole stack of large packages will be completely destroyed in less than 15 days. hardening. Because of the hardening of the explosive, many inconveniences and many hidden dangers are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B23/00C06B31/28
Inventor 李占荣李蔓红
Owner SHANXI TOND CHEMICAL CO LTD
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