Composite additive for high-strength high temperature and high moisture resisting porous granular nitramine

Abstract

The invention relates to a waterborne composite additive which can improve the physical properties of porous granular nitramine. The composite additive is characterized by consisting of internally added full water soluble powder and an ointment-shaped outer wrapping agent. The internally added full water soluble powder consists of an enhancer, an anti-crystal change agent, a diffusant and the like. The ointment-shaped outer wrapping agent consists of a water repellent, an anti-crystal change agent, an enhancer and the like. The composition additive is provided by the invention to overcome the deficiencies of additive for porous granular nitramine researched by predecessors that the porous granular nitramine product is low in strength, easy to block in high temperature and moist environments, more foam in production process of powder aqueous liquor, high cost due to imported raw materials and the like in actual use. The composite additive has the characteristics that not only is high-strength porous granular nitramine prepared, but also the product can be stored for three months in high temperature and moist environments, and the shatter value is maintained at 90%. The composite additive provided by the invention can be further used as an effective anti-blocking agent for preparing a high nitrogen nitryl compound fertilizer. The fortified concentration of the composite additive provided by the invention is 0.10-0.12%.

Description

technical field [0001] The invention relates to a composite surfactant for improving the physical properties of porous granular ammonium nitrate, an oxidant main component of ammonium oil explosives, in particular to a water-soluble composite additive for preparing high-strength, high-strength, high-temperature-resistant, high-humidity porous granular ammonium nitrate. The composite additive is composed of an internally added powder and an ointment-like coating agent; the internally added water-soluble powder is composed of a reinforcing agent, an anti-crystal change agent, a diffusing agent, etc.; the ointment-like coating agent is composed of a water-repellent Agents, enhancers and other components. Background technique [0002] Because porous granular ammonium nitrate has the characteristics of high oil absorption and low bulk density, it is widely used as the main oxidant of low detonation velocity ammonium oil explosives for explosive processing and low detonation veloc...

AI Technical Summary

Problems solved by technology

However, porous ammonium nitrate also has inherent defects such as easy crystal change, easy moisture absorption, easy phase change, salt bridge recrystallization, etc., which brings great inconvenience and unsafe hidden dangers to industrial and agricultural use, especially in the industry and domestic and foreign markets. , it is required to seek a new technology that can prepare high-strength, high-temperature, high-humidity, porous granular ammonium nitrate and use reliable additives

[0003] For half a century, scientific and technical personnel have done a lot of research work on improving the physical properties of porous granular ammonium nitrate: in the 1980s, Japan used the patented technology of acetate (JP7650898, 1978) to produce porous granular ammonium nitrate, but due to the use of It needs to use glacial acetic acid with a strong pungent taste, which has high production cost, pollutes the environment, and is inconvenient to produce and use

Therefore, the traditional technology makes the product have disadvantages such as poor thermoplasticity, low particle strength, low thermal decomposition temperature, and inability to effectively control the crystal transformation of ammonium nitrate.

The author of the Chinese patent (patent number ZL99114733.2, 1999) improved and invented a high-stability and heat-resistant ammonium nitrate loosening agent. This patented technology has been adopted by many production granulation and porous ammonium nitrate factories in China, but in a few years In actual use, it is found that there are defects such as easy blockage of the granulation nozzle, unsafe large cycle process and poor water solubility of the loosening agent itself, which will often cause the loosening agent to be bonded and carbonized on the filter screen for a long time and cause spontaneous combustion; the French KT company has developed Trying to solve the above-mentioned defects, the internally added and externally wrapped composite anti-caking agent has problems such as high raw material cost, large product dust, and low oil absorption rate; Granular ammonium nitrate water-soluble pore-forming agent", which successfully introduces the inorganic material foaming agent and the penetrating agent that acts as a crystal control into the pore-forming agent component, effectively improving the looseness and looseness of porous granular ammonium nitrate during the storage period. Improved product oil absorption

However, in actual use, there are still defects such as low strength of porous granular ammonium nitrate particles, easy agglomeration when stored in a high temperature and humid environment, more foam in the powder aqueous solution in the production process, and expensive raw material imports. A new type of additive that can improve safety and improve the physical properties of porous granular ammonium nitrate has become a technical problem that must be further solved

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