JPH10101467A - Explosive composition and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an explosive composition improved in the detonation reaction rate and the generation of gas after blasting by uniformly mixing an oxidizing agent composed mainly of ammonium nitrate with a fuel and a potassium compound. SOLUTION: This explosive composition contains an oxidizing agent composed mainly of ammonium nitrate, a fuel and a potassium compound and has fine crystals containing 111-phase ammonium nitrate on the surface of particle. The fine crystal is an acicular or dendrite crystal having a longitudinal length of about 1-200μm. The explosive composition is produced e.g. by mixing an oxidizing agent composed mainly of ammonium nitrate with a fuel and adding a potassium compound to the mixture or adding a mixture of a fuel and a potassium compound to an oxidizing agent composed mainly of ammonium nitrate. The preferable oxidizing agent is porous granular ammonium nitrate, crushed porous ammonium nitrate, powdery ammonium nitrate, etc. The potassium compound is preferably potassium sulfate, potassium nitrate, potassium sorbate, potassium benzoate, potassium acetate, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to industrial explosives, and more particularly to the fields of mining and industry such as civil engineering, quarrying, mining, coal mining, and tunnel excavation; and agriculture and forestry such as drainage, irrigation, clearing, root removal, and logging. An explosive composition used for blasting, crushing, excavating, and the like in the marine field such as removal of undersea weeds and mud, and a method for producing the same.

[0002]

2. Description of the Related Art Typical examples of industrial explosives include dynamite, hydrous explosives, and explosives for nitrate oil. Especially,
The nitric acid explosive is composed of two parts, 94 parts of porous granular nitric acid and 6 parts of oil, and is an insensitive explosive that cannot be detonated with a single detonator. Due to its low cost and low cost, the demand for explosives for blasting at non-tunnel sites (light sites) tends to increase year by year. As a measure for improving the explosive property of such an nitrate oil explosive, a method using a prill nitrate having a specific oil absorption rate or a prilled prill nitrate having a specific oil absorption rate as disclosed in JP-A-7-69772 is disclosed in JP-A-221178 discloses a method using prill nitrate having a limited oil absorption and particle size, JP-A-2-267182 uses a wax as a fuel, JP-A-8-48590.
There is known a method of mixing and molding an oxidant and a fuel at a high temperature as shown in Japanese Patent Application Laid-Open Publication No. HEI 10-260, 1988. In addition, as a countermeasure against gas after blasting of nitrate oil explosives, adjust the blending ratio of light oil and the particle size of prill nitrate as shown in "Regarding gas after ANFO explosives" in the abstract of the 1965 research presentation sponsored by the Industrial Explosives Association. Methods are known.

[0003]

An ammonium nitrate explosive can be manufactured at a lower cost by a simple method than other industrial explosives. However, prill nitrate having a specific oil absorption rate, prill nitrate having a limited particle size, and crushed nitrate are used. The detonation reaction speed and gas after blasting of the used nitric acid explosives and the adjusted amount of light oil were not sufficiently improved, making it difficult to use in hard rock excavations such as tunnels and sites with poor ventilation. Met. Therefore, there remains a problem that the detonation reaction rate is low and that a large amount of harmful gases such as carbon monoxide and nitrogen oxides are generated after blasting.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, by mixing at room temperature without dissolving a potassium compound in an oxidizing agent mainly composed of ammonium nitrate and a fuel. The present inventors have found that fine crystals containing phase III ammonium nitrate are formed on the surfaces of explosive particles constituting the explosive composition and on some of the voids, which are gaps between primary particles inside the particles. The explosive composition containing the explosive particles forming the fine crystals has an increased detonation reaction speed (explosion speed), and has found that the rock breaking force and the gas after blasting are remarkably improved, thereby completing the present invention. . That is, the constitution of the present invention is the following explosive composition and a method for producing the same. (1) An explosive composition containing an oxidizing agent mainly composed of ammonium nitrate, a fuel, and a potassium compound, and containing fine crystals containing phase III ammonium nitrate on the surface of particles. (2) A method for producing an explosive composition in which an oxidizing agent mainly composed of ammonium nitrate and a fuel are mixed and then a potassium compound is added and mixed. (3) A method for producing an explosive composition in which a mixture of a fuel and a potassium compound is added to and mixed with an oxidizing agent mainly composed of ammonium nitrate.

What is surprising in the present invention is that an explosive composition consisting essentially of an oxidizing agent, a fuel and a potassium compound,
In addition, a small amount of potassium sulfate, potassium nitrate, potassium bromide, potassium iodide, potassium dihydrogen phosphate, potassium chloride, potassium sorbate, potassium naphthyl acetate,
By adding one or more fine powders selected from potassium benzoate, potassium acetate, potassium hydrogen tartrate, and potassium P-styrenesulfonate, the surface of the explosive composition and the inside of the particles are added. It has been found that fine crystals containing phase III ammonium nitrate are formed in a part of the gap, and that an explosive composition having a significantly improved explosion velocity and gas after blasting can be obtained.

The structure of the particle surface or particle cross section of the explosive composition of the present invention can be observed by, for example, an electron micrograph. 1 and 2 show structural photographs of the surface and cross section of an example of the explosive composition according to the present invention, taken by an electron microscope. 3 and 4 show structural photographs of the surface and cross section of the explosive composition according to the prior art. FIG. 1 is an enlarged (magnification: 500) particle surface of the explosive composition of the present invention, that is, a part of the outer periphery of the particle. Needle-like crystals that are gathered as if they were fused together, or dendrites that are partly fused to form a tree-like branch that looks like a tree branch are formed on the particle surface of the explosive composition. Is deposited and formed on a part of. FIG. 2 is a cross-sectional view of a particle of the explosive composition of the present invention, that is, an enlarged portion (magnification: 500) of a part of the inside of the particle. Etc. are deposited and formed. FIG. 3 is an enlarged view (magnification: 500) of the particle surface of the conventional explosive composition, that is, a part of the outer periphery of the particle. Needle-like crystals and the like as shown in FIG. No precipitation or formation. FIG. 4 shows a particle cross section of a conventional explosive composition, that is,
This is an enlarged part (magnification: 500) of the inside of the particle, and no needle-like crystals or the like as seen on the particle surface are deposited or formed in the vicinity of the particle surface.

[0007] The particles of the present invention also include secondary particles formed by agglomeration of primary particles. Therefore, the explosive composition of the present invention includes those in which needle-like crystals are formed in the vicinity of the particle surface. The fine crystals referred to in the present invention are the above-mentioned independent needle-like crystals having a diameter of about 0.5 to 10 μm and a length of about 2 to 100 μm, the crystals in which the needle-like crystals are aggregated and the needle-like crystals are branched. It refers to dendritic crystals that are formed and crystals in the form of a mixture of these crystals.

Further, the fine crystals of the present invention have
Contains phase II nitrate. The phase III nitrate had a diffraction angle of about 34.2 when the explosive composition was analyzed with a powder X-ray diffraction apparatus.
Each time, a diffraction intensity peak is shown. The explosive composition of the present invention comprises an oxidizer, a fuel and a potassium compound. Each composition is 90-97% by weight of the oxidizing agent, 3-10% by weight of the fuel, and 0.2-10% by weight of the potassium compound. The oxidizing agent needs to be mainly composed of ammonium nitrate. Preferably, 80 to 100% by weight of the oxidizing agent is ammonium nitrate. In addition,
The potassium compound may be contained in ammonium nitrate.

Hereinafter, a method for producing the explosive composition of the present invention will be described. As the oxidizing agent used in the present invention, those known in the explosive industry can be used. For example, ammonium nitrate, sodium nitrate, etc. which have been conventionally used as typical oxidizing agents for industrial explosives can be used. . As described above, the oxidizing agent contains ammonium nitrate as a main component, and preferably 80% by weight or more of the oxidizing agent is ammonium nitrate. The ammonium nitrate may include an ammonium nitrate explosive mixed with a fuel or potassium, particularly having a bulk specific gravity of about 0.7 to 0.8 and a particle size of 0.8 to 2.
Prill nitrate, the majority of which is 4 mm, is preferred. Also,
It is preferable to use ammonium nitrate powder, porous granular ammonium nitrate, or powdered ammonium nitrate obtained by crushing it. In particular, those obtained by crushing prill nitrate are preferable. Oxidants other than ammonium nitrate include sodium nitrate and calcium nitrate.

The amount of the oxidizing agent added is preferably 90 to 97% by weight based on the total composition of the explosive composition. Within this range, the explosive speed does not decrease while maintaining the performance as an explosive. Also, there is no problem such as a decrease in the detonation performance and an increase in the frequency of detonation interruption with a normal booster amount. More preferred is 94 to 96% by weight. The fuel of the present invention
Those known in the technical field of explosives can be used. In particular, a liquid at room temperature is preferable. For example, there are light oil, kerosene, dinitrotoluene, dinitroxylene, alcohol, nitropropane and the like, and one kind or a combination of two or more kinds can be used. Above all, light oil is a good fuel that has good miscibility with ammonium nitrate, is inexpensive, and has an explosive speed improving effect with excellent practicality.

The amount of fuel added is preferably 3 to 10% by weight based on the total composition. Within this range, the performance as an explosive can be maintained, and there is no increase in nitrogen oxides and carbon monoxide in the gas after blasting, so that the safety work at the blasting site is improved. More preferably, it is 4 to 6% by weight. The potassium compound of the present invention includes potassium sulfate, potassium nitrate, potassium bromide, potassium iodide, potassium dihydrogen phosphate, potassium chloride, potassium sorbate, potassium naphthyl acetate, potassium benzoate, potassium acetate, potassium hydrogen tartrate, One or more of potassium P-styrenesulfonate and the like can be selected and used. Above all, fine powders of potassium nitrate, potassium sulfate, potassium benzoate, and potassium sorbate have remarkable improvements in explosive velocity and gas after blasting.

The above-mentioned potassium compound is added in the form of a powder. However, when the particle size is large, the amount of fine crystals precipitated is reduced, the effect of improving the reactivity is reduced, and the explosion speed is not sufficiently improved. Therefore, the particle size of the potassium compound used in the present invention is preferably 150 μm or less. Preferably 70μ
m, more preferably 0.5 to 20 μm. When large particles are used, if they are refined or partly dissolved or dispersed in an organic solvent such as dimethylsulfoxide, fine crystals will precipitate over a wide area of the explosive particles, resulting in poor quality such as explosion velocity. Give good results.

The amount of the potassium compound of the present invention is preferably 0.2 to 10% by weight based on the total composition. Within this range, the performance as an explosive is maintained, the explosion velocity and the gas after blasting are sufficiently improved, and there is no disadvantage that reactivity is impaired and the explosion velocity is reduced. More preferably, it is 0.5 to 5% by weight. The explosive composition of the present invention is produced by uniformly mixing an oxidizing agent mainly composed of ammonium nitrate, a fuel, and a potassium compound. At this time, in advance, a mixture of an oxidizing agent mainly composed of ammonium nitrate and a finely divided potassium compound is prepared, and
It can also be manufactured by adding a fuel to the mixture and mixing it uniformly. It is also possible to add an oxidizing agent mainly composed of ammonium nitrate and a mixture of the finely powdered potassium compound and the fuel sufficiently, and to uniformly mix the mixture.

In any of the productions, the explosive raw material used contains 0.1 to 0.6% by weight of water. Within this range, the water content is appropriate, and the precipitation of fine crystals containing phase III nitrate is not hindered. A more preferable range in which fine crystals are easily precipitated is 0.15 to 0.4% by weight.
It is. Therefore, for a period of about 3 to 30 days after production, it is preferable to keep the water content in the above-mentioned range. It is not necessary to keep the water content within the above range after the fine crystals are sufficiently precipitated. However, in order to keep the crystals of the explosive composition more stable, after the fine crystals are precipitated, the water content is preferably 0.01 to 0.1%. It is recommended to maintain the weight at 6% by weight.

Although the explosive composition of the present invention sufficiently satisfies the requirements as an explosive, it is possible to further improve the performance by adding fine powder of aluminum as necessary or using coal powder as a fuel. , Gilsonite, tire powder, sulfur, flour, sucrose, molasses, glucose, fructose, lactic acid,
It is also possible to add glycine, resin fine particles and the like.
In addition, in order to improve the water resistance by adding a polymer powder in consideration of blasting work in water or under the sea, etc., use heat-resistant polyacrylamide powder and its coagulant to add heat resistance. Can be. Further, a surfactant may be used for chargeability and solidification prevention.

[0016]

Next, the present invention will be described by way of examples. Measurement of bulk specific gravity, filling specific gravity, explosion velocity, gas after blasting, morphological observation by electron microscope, and powder X-ray diffractometer III
The measurement of sodium nitrate was performed by the following method.

[0017]

[Measurement of bulk specific gravity] Use a 32A steel pipe (outer diameter 42.7m)
m, inner diameter 35.7mm, thickness 3.5mm, length 350m
m) was sealed at one end and charged with explosives without tamping. The weight of the charged explosives and the volume of the explosives occupying the container were read, and the specific gravity was calculated from the weight and volume of the explosives.

[0018]

[Measurement of filling specific gravity] A 32A steel pipe (outer diameter 42.7m)
m, inner diameter 35.7mm, thickness 3.5mm, length 350m
After sealing one end of m) and filling the explosive with tamping, the weight of the charged explosive and the volume of the explosive in the container were read, and the filling specific gravity was calculated from the weight and the volume of the explosive.

[0019]

[Measurement of explosion velocity] 32A steel pipe (outer diameter 42.7mm, inner diameter 3
(5.7 mm, thickness 3.5 mm, length 350 mm) was sealed at one end and charged with an explosive, and then a No. 6 primer with an explosive (No. 3 paulownia dynamite 30 g) was used. After insertion into the center of the end, a primer was detonated on sand and the explosion velocity was measured by the optical fiber method.

[0020]

[Measurement of gas after blasting] Cylindrical container (made of tin, inner diameter 40 m
m, 240 mm in length) was filled with 200 g of explosive, and the explosive was fitted with an explosive (30 g of paulownia dynamite).
Then, after the No. 6 primer was attached to the explosive, the cavity containing the container was filled with clay containing water to obtain an explosive container. Further, the explosion container was inserted into a cylindrical container (made of tinplate) filled with the clay at the bottom at an inner diameter of 100 mm and a length of 250 mm. After covering the container gap and opening with the clay, the explosion was carried out at the center of the tank. I let it. Immediately after the explosion, the tank was sealed, and one minute after the explosion, carbon monoxide, nitrogen monoxide, and ammonia in the tank were measured using a Kitagawa detector tube.

[0021]

[Morphological Observation by Electron Microscope] After platinum is vapor-deposited on the particle surface and cross-section (split cross-section) of the explosive using an ion vapor deposition device (E-1010: manufactured by Hitachi, Ltd.), an electron microscope (S-
2360N: manufactured by Hitachi, Ltd.), microcrystals precipitated on the particle surface and the particle cross section were observed, and the result was ◎; microcrystals were precipitated on both the particle surface and the inside of the particle. ；: Microcrystals precipitated on the particle surface. X: It was determined that microcrystals did not precipitate.

[0022]

[Measurement of phase III ammonium nitrate by X-ray diffractometer] The powder of the explosive was pulverized, and the X-ray diffraction pattern of the crystal was measured by a powder X-ray diffractometer. A peak is indicated by x, and a diffraction intensity peak is not indicated around a diffraction angle of 34.2 degrees.

[0023]

Example 1 2000 g of prill nitrate (manufactured by Mitsubishi Chemical) having a water content of 0.15% by weight and 120 g of light oil No. 2 were sufficiently mixed by hand in a polyethylene bag (hereinafter abbreviated as a poly bag). Next, a particle size of about 0.5 to 70 μm and a water content of 0.0
3% by weight potassium sulfate (special grade reagent manufactured by Kishida Co., Ltd.) 2
0 g was added into the above-mentioned plastic bag and thoroughly mixed by hand to obtain an explosive particle composition. Then, at room temperature (about 20 ° C), about 2
After storage for 0 days, measurement of bulk specific gravity, filling specific gravity, explosion velocity, gas after blasting, morphological observation with an electron microscope, and measurement of phase III nitrate with a powder X-ray diffractometer were performed. Table 1 shows the results.

[0024]

Example 2 2000 g of prill nitrate (manufactured by Mitsubishi Chemical) having a water content of 0.10% by weight, potassium sulfate having a particle size of about 0.5 to 70 μm and a water content of 0.05% by weight (special grade reagent manufactured by Kishida Co., Ltd.) 60 g was thoroughly mixed by hand in a plastic bag. Next, 120 g of No. 2 light oil was added into the above-mentioned plastic bag and thoroughly mixed by hand to obtain an explosive particle composition. Thereafter, after storage at room temperature (about 20 ° C.) for about 20 days, measurement of bulk specific gravity, filling specific gravity, explosion velocity, gas after blasting, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with a powder X-ray diffractometer were performed. .
Table 1 shows the results.

[0025]

Example 3 2000 g of prill nitrate (manufactured by Mitsubishi Chemical) having a water content of 0.10% by weight and 120 g of No. 2 light oil were thoroughly mixed by hand in a plastic bag. Next, a particle size of about 5 to 100 μm
m, 40 g of potassium nitrate (reagent grade, manufactured by Katayama Chemical Co., Ltd.) having a water content of 0.08% by weight was added and thoroughly mixed by hand to obtain an explosive particle composition. Thereafter, after storage at room temperature (about 20 ° C.) for about 20 days, measurement of bulk specific gravity, filling specific gravity, explosion velocity, gas after blasting, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with a powder X-ray diffractometer were performed. . Table 1 shows the results.

[0026]

Example 4 2000 g of prill nitrate (manufactured by Mitsubishi Chemical) having a water content of 0.15% by weight and 60 g of potassium sorbate (reagent grade 1 made by Wako Pure Chemical Industries) having a particle size of about 2-80 μm and a water content of 0.15% by weight Was thoroughly hand-mixed in a plastic bag. Next, 80 g of No. 2 light oil was added to the above-mentioned plastic bag and mixed thoroughly by hand to obtain an explosive particle composition. Then, at room temperature (about 20
℃) for about 20 days, then the bulk specific gravity, the filling specific gravity, the explosion velocity,
After blasting, gas measurement, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with an X-ray diffractometer were performed. Table 1 shows the results.

[0027]

Example 5 2000 g of prill nitrate (Mitsubishi Chemical) containing 0.10% by weight of water and 40 g of potassium sorbate (Wako Pure Chemical Reagent 1 grade) having a particle size of about 2 to 80 μm and a water content of 0.03% by weight Was thoroughly hand-mixed in a plastic bag. Next, 92 g of No. 2 light oil was added to the above-mentioned plastic bag and mixed thoroughly by hand to obtain an explosive particle composition. Then, at room temperature (about 20
℃) for about 20 days, then the bulk specific gravity, the filling specific gravity, the explosion velocity,
Measurement of gas after blasting, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with a powder X-ray diffractometer were performed. Table 1 shows the results.

[0028]

Example 6 2000 g of prill nitrate (manufactured by Mitsubishi Chemical) having a water content of 0.10% by weight, potassium benzoate having a particle size of about 2 to 80 μm and a water content of 0.05% by weight (reagent 1 manufactured by Wako Pure Chemical Industries, Ltd.)
Grade) and 40 g were sufficiently mixed by hand in a plastic bag. Then
100 g of No. 2 light oil was added to the above-mentioned plastic bag and mixed thoroughly by hand to obtain an explosive particle composition. Then, at room temperature (about 20
℃) for about 20 days, then the bulk specific gravity, the filling specific gravity, the explosion velocity,
Measurement of gas after blasting, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with a powder X-ray diffractometer were performed. Table 1 shows the results.

[0029]

Example 7 An ANFO explosive with a water content of 0.2% by weight [An explosive nitrate: Explosives manufactured by Asahi Kasei Kogyo] 2000 g with a particle size of about 0.5
An explosive composition was obtained by sufficiently hand-mixing 60 g of potassium sulfate (special grade of reagent manufactured by Kishida Co., Ltd.) with a water content of 0.03% by weight in a plastic bag. Then, at room temperature (about 20
℃) for about 20 days, then the bulk specific gravity, the filling specific gravity, the explosion velocity,
Measurement of gas after blasting, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with a powder X-ray diffractometer were performed. Table 1 shows the results.

[0030]

Embodiment 8 Particle size of about 0.1 to about 0.2% by weight of water content
2000 g of 0.4 mm crushed prill nitrate (crushed product of Sumitomo Chemical's prill nitrate) and 40 g of potassium sulfate (special grade reagent manufactured by Kishida Co., Ltd.) having a particle size of about 0.5 to 70 μm and a water content of 0.05% by weight. Mix well by hand in a plastic bag. Then
120 g of No. 2 light oil was added into the above-mentioned plastic bag and mixed thoroughly by hand to obtain an explosive particle composition. Then, at room temperature (about 20
℃) for about 20 days, then the bulk specific gravity, the filling specific gravity, the explosion velocity,
Measurement of gas after blasting, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with a powder X-ray diffractometer were performed. Table 1 shows the results.

[0031]

Comparative Example 1 1880 g of prill nitrate (manufactured by Mitsubishi Chemical) having a water content of 0.15% by weight and 120 g of No. 2 light oil were sufficiently mixed by hand in a plastic bag to obtain an explosive composition. Thereafter, after storage at room temperature (about 20 ° C.) for about 20 days, measurement of bulk specific gravity, filling specific gravity, explosion velocity, gas after blasting, morphological observation with an electron microscope, and measurement of phase III ammonium nitrate with a powder X-ray diffractometer were performed. . Table 1 shows the results.

[0032]

Comparative Example 2 Particle size: about 0.1 to 0.4 mm, water content: 0.1
An explosive composition was obtained by sufficiently hand-mixing 1880 g of 25 wt% crushed prill nitrate (crushed product of Sumitomo Chemical's prill nitrate) and No. 2 light oil in a plastic bag. Then, at room temperature (about 20 ° C)
After storage for about 20 days, measurement of bulk specific gravity, filling specific gravity, explosion velocity, gas after blasting, morphological observation with an electron microscope, and measurement of phase III nitrate with a powder X-ray diffractometer were performed. Table 1 shows the results.

[0033]

Comparative Example 3 1740 g of prill nitrate (manufactured by Mitsubishi Chemical) having a water content of 0.15% by weight, 5 to 100 μm, and a water content of 0.15% by weight.
A mixture of 140 g of 08% by weight of potassium nitrate (Katayama Chemical Co., Ltd. reagent, 140 g) was heated at about 160 ° C. to prepare a molten mixture, which was allowed to cool. Next, 0.8 to 1.4 μm
The above-mentioned melted mixture and 120 g of light oil were sufficiently mixed by hand to obtain an explosive composition. Then, at room temperature (about 20 ° C)
After storage for about 20 days, measurement of bulk specific gravity, filling specific gravity, explosion velocity, gas after blasting, morphological observation with an electron microscope, and measurement of phase III nitrate with a powder X-ray diffractometer were performed. Table 1 shows the results.

[0034]

[Table 1]

[0035]

The explosive particle composition and the method for producing the same according to the present invention, by changing the surface structure of the explosive particles, can solve the drawbacks of conventional explosives such as nitrous acid oil explosives in terms of power and consumption of gas after blasting. Improvements have also been made possible for use in tunnel blasting.

[Brief description of the drawings]

FIG. 1 is an electron micrograph of the particle surface of the explosive composition of the present invention.

FIG. 2 is an electron micrograph of a particle cross section of the explosive composition of the present invention.

FIG. 3 is an electron micrograph of a particle surface of a conventional explosive composition.

FIG. 4 is an electron micrograph of a particle cross section of a prior art explosive composition.

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[Procedure amendment]

[Submission date] October 7, 1996

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Claims (9)

[Claims] 1. An explosive composition containing an oxidizing agent mainly composed of ammonium nitrate, a fuel and a potassium compound, and containing fine crystals containing phase III ammonium nitrate on the surface of particles. 2. The explosive composition according to claim 1, wherein the fine crystals are acicular or dendritic crystals. 3. A needle-like or dendritic crystal having a longitudinal length of 1
The explosive composition according to claim 2, which has a size of ~ 200 µm. 4. The method for producing an explosive composition according to claim 1, wherein a potassium compound is added and mixed after mixing an oxidizing agent mainly composed of ammonium nitrate and a fuel. 5. A method for producing an explosive composition wherein a mixture of a fuel and a potassium compound is added to and mixed with an oxidizing agent mainly composed of ammonium nitrate. 6. The method for producing an explosive composition according to claim 4, wherein the oxidizing agent is selected from one or more of porous granular ammonium nitrate, crushed porous ammonium nitrate, and powdery ammonium nitrate . 7. The method for producing an explosive composition according to claim 4, wherein the potassium compound is in the form of powder having a particle size of 0.5 to 150 μm. 8. The method according to claim 4, wherein the potassium compound is selected from one or more of potassium sulfate, potassium nitrate, potassium sorbate, potassium benzoate, and potassium acetate. 9. The method for producing an explosive composition according to claim 4, wherein the fuel is a liquid substance.