Ammonium Nitrate Composite Safety via Inert Particle Blending
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ammonium nitrate is difficult and hazardous to handle and store due to its explosiveness, and existing methods for forming stable ammonium nitrate composites are complex and inefficient.
Innovation Solution
A method involving blending ammonium nitrate particles with non-oxidizing compound particles of average diameter 1000 µm or less to create a homogeneous blend with an average diameter of 1 to 1000 µm, reducing oxidative tendencies and forming a non-explosive powder with a mole ratio of ammonium nitrate to the non-oxidizing compound between 0.8:1 and 1.2:1, which can be granulated and compacted for safer handling and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If ammonium nitrate is used in pure form, then high concentration of nitrate ions is achieved for agricultural use, but it becomes difficult and hazardous to handle and store due to explosiveness
Solution Approach 1:
The patent combines ammonium nitrate with inert materials such as sand, clay, or other non-reactive substances to create a composite material. This composite structure maintains the high nitrate ion concentration needed for agricultural effectiveness while the inert material acts as a diluent that reduces the explosiveness and detonability of pure ammonium nitrate, making it safer to handle and store.
2Object-affected harmful factors
If double salt with ammonium sulfate is used to reduce hazardous properties, then safety is improved, but the formulation process becomes relatively complex
Solution Approach 1:
Instead of using double salts that require complex formulation processes, the patent extracts or separates the safety function by adding simple inert materials like sand or clay to the ammonium nitrate. This approach achieves the same hazard reduction effect as double salts but with a much simpler mixing process that does not require precise stoichiometric ratios or complex crystallization steps.
3Manufacturing precision
If ammonium nitrate particles are ground to small size (1-40 μm), then mixing homogeneity is improved, but the material becomes more susceptible to detonation under mild conditions
Solution Approach 1:
The patent introduces inert materials such as sand, clay, or other non-reactive substances as intermediary materials mixed with the ammonium nitrate particles. These intermediary particles act as physical barriers that reduce the contact between ammonium nitrate particles, thereby降低ing the detonability even when the ammonium nitrate is ground to small sizes for good mixing homogeneity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces a stable, non-explosive ammonium nitrate composite that is safer to handle and store, with tailored nutrient compositions suitable for fertilizers, achieving reduced oxidation potential and improved safety during handling and storage.
Implementation Method 1
blending ammonium nitrate particles having an average particle diameter greater than 1 mm and a non-oxidizing compound particles having an average particle diameter of 1,000 μm or less; and reducing the average size of said ammonium nitrate particles in the presence of said non-oxidizing compound particles to produce a homogeneous blend
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method forms a relatively stable ammonium nitrate composite material. The method includes (a) blending ammonium nitrate with an average particle diameter greater than about 1 mm and a substantially non-oxidizing compound in fine particle form; and (b) reducing the average size of said ammonium nitrate granules in the presence of the non-oxidizing compound in fine particle form to produce a substantially homogeneous blend of ammonium nitrate and the non-oxidizing compound having an average particle diameter of about 1 to about 1,000 m to form a substantially non-explosive powder.