Water-soluble pore-forming agent used for bulky porous granular ammonium nitrate with high oil absorptivity

Abstract

The invention relates to a water-soluble pore-forming agent for improving performances of porous granular ammonium nitrate and is characterized in that the pore-forming agent is composed of foaming agents, penetrating agents, reinforcing agents, dispersing agents, heat resistance agents and solubilizing agents. The invention aims to solve the problems in the prior art that the porous granular ammonium nitrate additive has poor oil absorptivity during practical use, the granulation sprayer is liable to be blocked during production process, the additive deposits on the filter screen are carbonized to cause spontaneous combustion, the imported raw materials have high cost, and the wrapping agent is inconvenient to use. The invention has the following characteristics: all the components of the pore-forming agent dissolve completely in water, which prevents the sprayer from being blocked during granulation process after the pore-forming agent is mixed with molten ammonium nitrate and ensures safety in ammonium nitrate mother liquid large-loop operation. The pore-forming agent is used as an effective additive for preparation of bulky porous granular ammonium nitrate with high oil absorptivity, and is also used as a moisture-proofing and anti-caking additive for preparation of bulky granular ammonium nitrate, bulky crystal ammonium nitrate and bulky nitrates. The amount of addition of the pore-forming agent is 0.08% to 0.12%.

Description

technical field [0001] The invention relates to a surfactant for improving the porous granular ammonium nitrate which is the main component of the ammonium oil explosive, in particular to a water-soluble pore-forming agent for preparing loose porous granular ammonium nitrate with high oil absorption rate. The pore-forming agent is composed of foaming agent, penetrating agent, reinforcing agent, dispersing agent, heat-resistant agent and solubilizing agent. technical background [0002] Porous granular ammonium nitrate is a form of industrial ammonium nitrate. Because of its high oil absorption rate and low bulk density, it is widely used as the main oxidant of ammonium oil explosives and low detonation velocity explosives without secondary explosives. Its economy, flexibility and safety are superior to emulsification and Powder milk explosives, so the output of modern porous granular ammonium nitrate has amazing development in China. According to incomplete statistics: its...

AI Technical Summary

Problems solved by technology

However, in actual use, there are two defects of incompatibility with emulsifiers and spontaneous combustion in high-temperature operations. It was improved by the author of the Chinese patent (Patent No. ZL99114733.2, 1999) in time, and invented a high-stability and high-heat-resistant nitrate. Ammonium loosening agent, this patented technology has been adopted in many granulated ammonium nitrate factories in China. However, in several years of actual use, it is found that the granulation nozzle is easy to be blocked, the large cycle process is not safe, and the loosening agent itself is poor in water solubility. The long-term heating of the loose agent on the filter will cause defects such as carbonization and spontaneous combustion; the French KT company has developed an internally added and externally wrapped composite anti-caking agent that tries to solve the above defects, but it also has inconvenient use, high raw material costs, and product dust. Therefore, exploring and providing a new pore-forming material that can solve safety and improve performance has become a technical problem that must be further solved.

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