JPH02267182A - Pressure-molded explosive - Google Patents

Abstract

PURPOSE:To make possible to use with directly pouring into water hole by using waxes as fuel material in explosive comprising a mixture of oxidizer and fuel material. CONSTITUTION:The subject pressure-molded explosive is obtained by pressuremolding a mixture of oxidizer and waxes as fuel material. Ammonium nitrate is widely used as oxidizer, especially porous prillammonium nitrate having <=1.4mm particle diameter is the most preferable as exploring property is improved as the oxidizer. A fuel material containing hydrocarbon exhibiting solid state at normal temperature is preferable as the waxes. For instance, single substance or a mixture of two or more of petroleum-based waxes such as paraffin wax or microcrystalline wax, animals and plants-based waxes such as wool wax or carnauba wax or mineral-based waxes such as montan wax is used.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pressure-molded explosive used in industrial blasting operations such as quarrying, civil engineering, and mining.

(Prior Art) As a typical example of an explosive made of a mixture of an oxidizing agent and a fuel substance, there is an ammonium nitrate explosive mixed with an ammonium nitrate oil (for example, light oil). Since this explosive cannot be detonated with a single detonator, a booster explosive is used for detonation, but since it is a granular material with relatively insensitive characteristics and fluidity, it cannot be poured directly into the blasting borehole. It is possible to fill the entire borehole tightly. In addition, because the unit price of the product is cheaper than other explosives, it is widely used as an industrial explosive.

On the other hand, ammonium explosives and Carlit are explosives in which metal powders such as aluminum and silicon iron are contained in a mixture of an oxidizing agent and a fuel substance. These explosives are in powder form and are usually used in cartridges. These explosives are sensitive enough to be detonated with a single detonator, and
Because it contains metal powder, it explodes at a higher detonation velocity than ammonium nitrate explosives. Ammonium nitrate explosives are used in relatively large boreholes with a diameter of 60 mm or more, while ammonium explosives and carlinod can be used in small boreholes with a diameter of 50 mm or less.

(Problem to be Solved by the Invention) Ammonium nitrate oil explosives, which are the most typical type of mixed explosives consisting of an oxidizing agent and a fuel substance, are widely used because they are safe to handle and inexpensive. The main ingredient is ammonium nitrate, and when it is poured directly into a borehole and loaded, ammonium nitrate easily dissolves in the presence of water, becomes insensitive, and does not explode. Its use is restricted in boreholes where there is water or at open pit mines in rainy weather.As a countermeasure, a method of using ammonium nitrate explosives is used by filling them into water-resistant plastic cartridges.

However, the cartridge was damaged and damaged by the borehole wall.
If water gets inside, the ammonium nitrate will easily dissolve. Additionally, since the bulk specific gravity of the cartridge as a whole is smaller than that of water, it is necessary to take measures such as adding weight to the cartridge in order to sink it into the water hole, making the loading process extremely complicated. .

In the case of ammonium explosive, it is difficult to pour into a borehole because it is in powder form, and the main component is ammonium nitrate.
Its solubility in water is similar to that of ammonium nitrate explosives. It is usually filled in a waterproof cartridge, which maintains its waterproofness, but if the cartridge is damaged, the ammonium nitrate inside will dissolve. Furthermore, when the borehole is filled with the cartridge, a gap is created between the borehole and the cartridge, resulting in wasted explosive energy. This is a problem that also occurs with cartridge-type explosives.

For carlinod, ammonium perchlorate alone or
A mixture of ammonium perchlorate and nitrate is used as the oxidizer component. Although ammonium perchlorate is less hygroscopic than ammonium nitrate, it is still soluble in water. Therefore, like ammonium explosives, it is impossible to use it by pouring it directly into a water hole, and if it is used in a cartridge, it will waste explosive energy just like ammonium explosives.

For this reason, water-resistant explosives are used at such sites. TNT-based explosives are available as water-resistant explosives that can be poured into the interior.
Although it is a high explosive and easily deposits in water holes, TNT
are themselves explosives and must be handled with great care, and their unit price is high, leading to an increase in blasting costs. In addition, slurry explosives and dynamite are used as water-resistant explosives, but these explosives
It is a cartridge-type explosive that is individually packed in a cartridge, and cannot be poured directly into a borehole like ammonium nitrate explosives.

Furthermore, the unit price is higher than ammonium nitrate explosives, leading to an increase in blasting costs.

Various studies have been carried out to improve the water resistance of ammonium nitrate explosives, one of which involves adding and mixing special drying ingredients to ammonium nitrate explosives. however,
With this method, direct loading into the water hole is not possible, and the water must be drained from the borehole in advance and then loaded.

If water springs up from cracks in the rock after loading, a special drying component interacts with the water to form a gel, preventing water from penetrating into the explosives.

Therefore, the water resistance performance of this type of ammonium nitrate oil explosive cannot be said to be essentially water resistant.

As mentioned above, a major challenge was to improve the explosives so that they could be used by directly pouring them into the water holes, making it safe and inexpensive to use explosives consisting of a mixture of oxidizing agents and fuel substances.

(Means for Solving the Problems) The present inventors have conducted intensive research to enable the explosives consisting of a mixture of an oxidizing agent and a fuel substance to be poured directly into a water hole, and as a result, the present inventors have discovered that a mixture of an oxidizing agent and a fuel substance can be directly poured into a water hole. It was discovered that by press-molding a predetermined amount at a time, it is possible to make an explosive that has excellent water resistance and can be filled directly into boreholes. That is, the present invention relates to a pressure-molded explosive characterized by pressure-molding a mixture of an oxidizing agent and a fuel substance.

The oxidizing agent used in the present invention includes nitric acid alkaline earth metal chlorates, alkali metal perchlorates, alkaline earth metal perchlorates, and ammonium perchlorate, either alone or in combination.

Among the oxidizing agents used in the present invention, the most economical and widely used one is ammonium nitrate, which is used in various forms such as powder, granules, and porous sprills. Among them, porous sprill ammonium nitrate has voids inside, so it comes into close contact with the fuel material, and its detonation sensitivity is less clear than other ammonium nitrates. Furthermore, among porous sprill ammonium nitrates, the particle size is 1.
．． When using fine porous sprill ammonium nitrate with a diameter of 4 mm or less,
It has improved explosive performance and is most preferred.

In the present invention, the oxidizing agent is preferably used in an amount of 85 to 98% by weight based on the entire pressure-molded explosive.

The waxes used in the present invention are fuel substances containing hydrocarbons and are preferably solid at room temperature. For example, petroleum waxes such as paraffin wax and microcrystalline wax, animal and vegetable waxes such as wool wax and carnauba wax, and mineral waxes such as montan wax may be used alone or in combination of two or more. It is also possible to use petroleum oils such as light oil, kerosene, and mineral oil that are liquid at room temperature, hydrophobic animal and vegetable oils, etc., in combination with the waxes mentioned above, as long as they are solid at room temperature. be.

When the above-mentioned waxes are mixed with resins such as petroleum resins, polyisobutylene resins, butadiene resins, polyethylene waxes, ethylene vinyl acetate copolymers, etc., pressure-molded explosives obtained by pressure molding can be obtained. The physical strength against impact and water resistance are improved, which is particularly advantageous.

The petroleum resin used in the present invention is a resin obtained by polymerizing a fraction obtained in the naphtha cracking process, and is a resin obtained by polymerizing a C5 fraction.
5 type petroleum resin, C9 type petroleum resin polymerized with C9 fraction, C5C9 type copolymerized petroleum resin copolymerized with both fractions,
Those having a molecular weight of 600 to 2,500 are preferred.

The polyisobutylene resin used in the present invention is a polymer of high purity isobutylene, and preferably has a molecular weight of 5,000 to 140,000.

The butadiene resin used in the present invention has the general formula [CI1
2-CH-CII-CII2] is polymerized with butadiene as the main component, leaving a double bond at the J, 2 bond and/or 1,4 bond, and the terminal part is C-I-D.
, C-Cool-■] or CCH2ClI20II
] and has a molecular weight of 500 to 200,000.
butadiene resins are preferred.

The polyethylene wax used in the present invention has the general formula [C
1-12-CI-12] with a molecular weight of 1,000 to 10,000%.

The ethylene-vinyl acetate copolymer used in the present invention is a copolymer of ethylene represented by the general formula CCH2=CI12] and vinyl acetate represented by the general formula CCH3COOCH=CH2], and has a melt index of 2 to 2. 500, and vinyl acetate copolymer is preferred.

In addition to the waxes of the present invention or mixtures of waxes and resins, it is also possible to use nitro compounds such as dinitrotoluene, dinitroxylene, dinitronaphthalene and the like.

In the present invention, the wax or the mixture of wax and resin is preferably used in an amount of 2 to 15% by weight based on the entire pressure-molded explosive.

In the present invention, waxes or
It is sufficient to use a mixture of waxes and resins, but it is also possible to use metal powder to increase the explosive energy.

The metal powder used in the present invention includes powders of various single metals and powders of various alloys, among which aluminum powder, mag, nesium powder, iron sulfide powder, iron silicon powder, etc. used. The most commonly used is aluminum powder,
Depending on the shape, aluminum is classified into flaky aluminum and atomized aluminum, but it can be used alone or in a mixture.

In the present invention, the metal powder is 0
It is preferable to use it in a range of 5% by weight.

Pressure molding of the present invention means putting a predetermined amount of a mixture of an oxidizing agent and a fuel substance into a mold and pressurizing it to form an aggregate of mixture particles, and there are no particular limitations on the shape of the molded product. isn't it. Depending on the shape of the mold, it can be molded into any shape such as a cylinder, disk, sphere, or prism.

The weight of a single piece of the pressure-molded explosive of the present invention can be arbitrarily selected, but it is in the range of 1 g to 30 g from the viewpoint of ease of loading into a borehole and detonation performance of the loaded pressure-molded explosive as a whole. things are desirable.

In addition, the density of one pressure-molded explosive depends on its settling ability in water holes and
A range of 1.0 g/cc to 1.30 g/cc is preferred to maintain adequate detonation performance.

The pressure-molded explosive obtained by pressure-molding the mixture of the oxidizing agent and fuel substance of the present invention, especially the mixture mainly with ammonium nitrate waxes, has superior water resistance performance compared to conventional ammonium nitrate oil explosives. However, the present inventors further
It has been discovered that by coating the outer surface of each pressure-molded explosive with a hydrophobic substance, water resistance and physical strength against impact can be dramatically improved.

As the hydrophobic substance for coating used in the present invention, in general, substances that repel water can be used. Petroleum-based oils such as mineral oil and heavy oil, petroleum-based waxes such as paraffin wax, microcrystalline wax, and petrolatum. synthetic oils such as silicone oil, wool wax,
Animal waxes such as beeswax, vegetable waxes such as carnauba wax and tree wax, higher fatty acids such as myristic acid and stearic acid, higher alcohols such as cetyl alcohol and stearyl alcohol, petroleum resin, polyethylene wax, butadiene resin, polyester Resins such as isobutylene resin, ethylene vinyl acetate copolymer, and epoxy resin are preferably used alone or in a mixture of two or more.

Among hydrophobic substances for coating, waxes such as paraffin wax and microcrystalline wax that are solid at room temperature, resins may be used singly or as a mixture, or a mixture of the above-mentioned hydrophobic substances may be solid at room temperature. The waterproof effect is further improved by using a material that exhibits a shape.

Methods for coating the outer surface of a pressure-molded explosive with a hydrophobic substance include impregnating it in a heated and melted hydrophobic substance, or in a solution diluted with a hydrophobic substance in an appropriate solvent;
Alternatively, it may be carried out by spraying a molten hydrophobic substance or a hydrophobic substance diluted in a suitable solvent.

]3 The amount of the hydrophobic substance for coating used in the present invention is:
It is desirable that the amount ranges from 0.01 g to 0.01 g per unit duram of pressure-molded explosive.

(Function) The inventors of the present invention have developed a method of forming hydrophobic particles on the outer surface of the pressure-molded explosive by pressure-molding a mixed explosive consisting of a mixture of an oxidizing agent and waxes or a mixture of waxes and resins. It was discovered that by coating with a substance, it is possible to make an explosive that can be poured directly into water holes and exhibits sufficient water resistance. In addition, by press-molding a mixture containing metal powder as a fuel material,
Alternatively, by further coating with a hydrophobic substance, it can be poured into water holes to exhibit water resistance and absorb explosive energy (Example) The present invention will be described in detail below with reference to Examples.

Example 1 94% by weight of porous sprill ammonium nitrate (Jumin Chemical Industry ■),
Paraffin wax (Hiki Seiro) heated and melted at 90℃
6% by weight (130°F paraffin) was added and thoroughly mixed to obtain an explosive mixture. Weigh 10g of this mixture and place it in a cylindrical mold, so that the density of one pressure-molded explosive is 1.07g.
/CC to obtain a pressure-molded explosive.

Example 2 A mixture of additive explosives was obtained by adding 94% by weight of fine porous sprill ammonium nitrate having a particle size of 1.411LI11 or less (Jumin Chemical Industry ■) at 90'C. Weigh 10g of this mixture and put it into a cylindrical mold, and the density of one pressure-molded explosive is 1.07.
A pressure-molded explosive was obtained by pressurizing it so that it became g/cc.

Example 3, particle size is 1.4. paraffin wax (Nippon Seiro ■130F) which was heated and mixed with 94% by weight of fine porous noryl ammonium nitrate (Jumin Kagaku Kogyo ■) at 90℃.
Paraffin) 5.4% by weight and ethylene vinyl acetate copolymer (Mitsui Polychemical ■Evaflex #250)
0.6% by weight was added and thoroughly mixed under heating at 90°G to obtain a granular explosive mixture.

Weigh 10 g of this mixture and place it in a cylindrical mold so that the density of one pressure-molded explosive is 1.07 g/cc.
Pressure was applied to obtain a pressure-molded explosive.

Example 4 To a mixture of 88% by weight of powdered ammonium nitrate (Ube Industries ■) and 6% by weight of ammonium perchlorate (Hayashi Junyaku Kogyo ■, reagent), 90%
3.6% by weight of paraffin wax (Nippon Seiro ■130F paraffin) preheated and mixed at ℃, microcrystalline wax (Nippon Seiso ■HiMiC1070)
1.5% by weight, petroleum resin (Toho Oil Resin ■, Toho Hi Resin #75) 0.2% by weight, ethylene vinyl acetate copolymer (Mitsui Polychemical ■, Evaflex #250
) and 0.3% by weight of polyisobutylene resin (Esso Chemical ■Pistanex MML-80) were added and thoroughly mixed under heating at 90°C to obtain a granular explosive mixture. Weigh 7g of this mixture and place it in a cylindrical mold so that the density of one pressure-molded explosive is 1.15g/
cc to obtain a pressure-molded explosive.

% and 5.8% by weight of paraffin wax (Nippon Seiwa 130F paraffin) heated and melted at 90°C.
The mixture was thoroughly mixed under heating at ℃. After cooling to room temperature, flake aluminum (Toyo Aluminum ■, POloo) 1.
0% by weight was added and thoroughly mixed to obtain a granular explosive mixture.

7 g of this mixture was weighed, put into a cylindrical mold, and pressurized so that the density of one pressure-molded explosive became 114 g/cC to obtain a pressure-molded explosive.

Example 6 Particle size is 1. Paraffin wax (Hiki Seiro ■1) was heated and mixed with 932% by weight of fine porous sprill ammonium nitrate (Jumin Kagaku Kogyo ■) of less than /i, fi and melted in advance at 90°C.
30F paraffin) 5.2% by weight, petroleum resin (Toho Oil Resin ■Tohono\Iresin #75) 0.1i weight%, polyethylene wax (Sanyo Chemical Industries ■Sunwax 15)
1P) 0.1% by weight and ethylene vinyl acetate copolymer (Mitsui Polychemical ■Evaflex #250) 0.4
% by weight of the mixture was added and thoroughly mixed under heating at 90°C. After cooling to room temperature, 1.0% by weight of flaky aluminum (Toyo Aluminum PO100) was added and thoroughly mixed to obtain a granular explosive mixture. Weigh 7g of this mixture and place it in a cylindrical mold so that the density of one pressure-molded explosive is 1.1.
4. A pressure-molded explosive was obtained by pressurizing it so that it became g/cc.

Example 7゜ A pressure-molded explosive was obtained using the same composition and manufacturing method as in Example 2.

Furthermore, a pressure-molded explosive was obtained by coating the outer surface with a hydrophobic substance consisting of paraffin wax, petrolatum, and petroleum resin.

Example 8 A pressure-molded explosive was obtained using the same composition and manufacturing method as in Example 3. Furthermore, a pressure-molded explosive was obtained by coating the outer surface with a hydrophobic substance consisting of paraffin wax, patrolatum, and petroleum resin.

Example 9 A mixture of 86.5% by weight of fine porous sprill ammonium nitrate with a particle size of 1.4 mm or less (Jumin Kagaku Kogyo ■) and 50% by weight of potassium nitrate (Wako Tsumugi Kogyo ■) was heated and dissolved in advance. 3.0% by weight of nitrotoluene (Wako Tsumugi Kogyo ■) was added and thoroughly mixed. Furthermore, 02% by weight of light oil (Nippon Oil ■ No. 2 light oil) preheated and melted and mixed, paraffin wax (
Japanese wax ■130F paraffin) 49% by weight, polyethylene wax (Sanyo Chemical Industries ■Sunwax 15IP)
0.2% by weight and butadiene resin (Japan Synthetic Rubber ■R
A mixture of B-810) was added and thoroughly mixed at 90°C to obtain a granular explosive mixture. Weigh 25g of this mixture and place it in a cylindrical mold so that the density of one pressure-molded explosive is 1.03.
A pressure-molded explosive was obtained by pressurizing the powder to give a pressure of g/cc. Furthermore, the outer surface was coated with a hydrophobic substance consisting of paraffin wax, microcrystalline wax, and ethylene-vinyl acetate copolymer to obtain a pressure-molded explosive.

Example 10 Paraffin wax (Japan Spirit ■1 30'F paraffin) 5.8% heated and dissolved in 93.2% by weight of fine porous sprill ammonium nitrate (Jumin Chemical Industry ■) with a particle size of 14 or less
% by weight was added and thoroughly mixed at 90°C.

After cooling to room temperature, 1.0% by weight of aluminum flakes (Toyo Aluminum ■, POloo) were added and thoroughly mixed to obtain a granular explosive mixture. Weigh 7g of this mixture,
The density of one pressure-molded explosive placed in a cylindrical mold is 1.
The explosive was pressurized to 14 g/cc to obtain a pressure-molded explosive. Furthermore, a pressure-molded explosive was obtained by coating the outer surface with a hydrophobic substance consisting of paraffin, petrolatum, and petroleum resin.

Example 11 52% by weight of paraffin wax (Nippon Seiro 130F paraffin) pre-heated and melted and mixed with 93.2% by weight of fine porous sprill ammonium nitrate (Jumin Chemical Co., Ltd.) with a particle size of 1.4 degrees or less A mixture of 0.6 wt. After cooling to room temperature,
Flake aluminum (Toyo Aluminum ■, Pol
oo) 1.0% by weight was added and thoroughly mixed to obtain a granular explosive mixture. 7 g of this mixture was weighed, put into a cylindrical mold, and pressurized so that the density of one pressure-molded explosive was 1.14 g/cc to obtain a pressure-molded explosive. Furthermore, the outer surface was coated with a hydrophobic substance made of paraffin wax to obtain a pressure-molded explosive.

Example 1 73.5% by weight of fine porous sprill ammonium nitrate with a particle size of 1.4 mm or less (Jumin Chemical Industry ■), powdered ammonium nitrate (Ube Industries ■)
) 10.0% by weight and potassium nitrate (Wako Tsumugi Kogyo ■)
84% by weight of the mixture, 4.2% by weight of paraffin wax (Hiki Seiro 130F paraffin) which was heated and mixed in advance, and microcrystalline wax (Japan Spirit 130F paraffin).
MiC1045) 1.0% by weight, petroleum resin (Toho Oil Resin ■Toho Hi Resin #=75) 0.2% by weight,
Polyethylene wax (Sanyo Chemical Industries ■Sunwax)
A mixture of 1% by weight of 151P) and 0.1% by weight of polyisobutylene resin (Esso Kagaku Corporation Vistane Hikix MML-80) was added and thoroughly mixed at 90°C. And atomized aluminum (Shiraishi Metal ■, VA-500) 2
．． 5% by weight was added and thoroughly mixed to obtain a granular explosive mixture. 10 g of this mixture was weighed, put into a cylindrical mold, and pressurized so that the density of one pressure-molded explosive was 1.25 g/cc to obtain a pressure-molded explosive.

Furthermore, the outer surface was coated with a hydrophobic substance made of paraffin wax to obtain a pressure-molded explosive.

Comparative Example 1 6.0% by weight of light oil (Nippon Oil Company ■ No. 2 light oil) was added to 940% by weight of porous sprill ammonium nitrate (Jumin Chemical Industry ■) and thoroughly mixed to obtain a granular explosive mixture.

Comparative Example 2 A granular explosive composition was obtained using the same composition and manufacturing method as in Example 1.

Comparative Example 3 A granular explosive composition was obtained with the same composition and manufacturing method as in Example 3.

Comparative Example 4 A granular explosive composition was obtained with the same composition and manufacturing method as in Example 5.

Comparative Example 5 Paraffin wax (Nihon Seikon 130') was heated and melted and mixed with 93.2% by weight of fine porous sprill ammonium nitrate (Jinmin Chemical Co., Ltd.) with a particle size of 1.4mj11 or less.
I'paraf, in) 52% by weight and ethylene vinyl acetate copolymer (Mitsui Polychemical ■Evaflex-1,j=
250) 0.6% by weight of the mixture was added and thoroughly mixed at 90°C. After cooling to room temperature, flake aluminum (
Add Toyo Aluminum PO100) 1.0% by weight,
After thorough mixing, a granular explosive composition was obtained.

Comparative Example 6 A granular explosive mixture was obtained using the same composition and the same manufacturing method as Comparative Example 1. Weigh 10g of this mixture and place it in a cylindrical mold.
A pressure-molded explosive was obtained by applying pressure so that the density of one pressure-molded explosive became 1.07 g/cc.

Furthermore, the outer surface was coated with a hydrophobic substance consisting of paraffin wax, petrolatum, and petroleum resin to obtain a pressure-molded explosive.

Comparative Example 7゜Porous sprill ammonium nitrate (Jumin Chemical Industry ■) 93.2% by weight
58% by weight of brain oil (Nippon Oil Co., Ltd. No. 2 light oil) was added to the mixture and thoroughly mixed. Then, 1.0% by weight of flaky aluminum (Toyo Aluminum PO100) was added and thoroughly mixed to obtain a granular explosive mixture. Weigh 7g of this mixture and place it in a cylindrical mold, so that the density of one pressure-molded explosive is
It was pressurized to 1.14 g/cc to obtain a pressure-molded explosive. Further, the outer surface was coated with a hydrophobic substance consisting of paraffin wax, petrolatum, and petroleum resin to obtain a pressure-molded explosive.

The compositions of Examples 1 to 12 and Comparative Examples 1 to 7 are summarized in Table 1.

All of these compositions were tested for water resistance, and the pressure-molded explosives were tested for physical strength, and comparative studies were conducted.

In the water resistance test, a simulated water hole was created in a steel pipe with an inner diameter of 65 mm and a length of 1000 mm, and the pressure-molded explosives of Examples 1 to 12 and Comparative Examples 6 to 7 and Comparative Examples were placed inside the steel pipe. ]～
Each of the granular explosives No. 5 was filled, and the explosive performance was measured in response to the elapsed time after filling.

To test the explosive performance, a pentolite with a diameter of 60 mm and a weight of 200 g was used as the booster, and it was detonated from the top of the steel pipe. According to Tortridge's detonation velocity test method, the explosion was conducted between two points 15 cm and 5 on from the bottom of the steel pipe. The average detonation velocity was measured.

1m height as a method to test the physical strength of pressure-molded explosives
Alternatively, a pressurized explosive was allowed to fall naturally onto a concrete floor from a height of 3 m, and the degree to which the pressurized explosive was destroyed (destruction rate) was examined. The destruction rate is determined by the weight Wo of the pressure-molded explosive before falling and the weight W of the largest fragment after falling.
It was calculated from l using the following formula.

These results are summarized in Table 2.

■1 An example of particle size distribution manufactured by Sumiya Kagaku Kogyo Co., Ltd. -8 Metsushi +10 +14 +20 +3
50% by weight ■2 An example of particle size distribution of fine porous sprill ammonium nitrate manufactured by Sumiya Kagaku Kogyo ■ +14 Mesohu 1-16 +20 -1-24 +35 -
35 Ube Industries ■ Manufactured by Wako Tsumugi Kogyo ■ Seirin Pure Chemical Industries ■ Nippon Oil ■ No. 2 diesel oil Made by Hiki Seikon ■ 130F paraffin Made by Nippon Seikon ■ HiMi C1045 Wako Pure Chemical Industries ■ Toho Oil Resin (barrel made 1・-Hono Injin-1#F5
Sunwax 151P made by Sanyo Chemical Industries ■Evaflex 4L250X13 made by Mitsui Polychem ■-14 ■-15 ■Made ■A-500 A: Paraffin Wanks/Petrolatum/Petroleum Resin (8
5/1015) B: Paraffin wax/microcrystalline wax/ethylene vinyl acetate copolymer (65/30/
5) C: Paraffin wax (effect of the invention) When dissecting water resistance, Examples 1 to 6 and Comparative Example 1
Comparing No. 5 to 5, granular explosives desensitize and become non-explosive within 10 minutes, but by pressure molding, explosive properties are maintained for 20 to 30 minutes, and water resistance is improved. What you are doing is obvious. And Example 1.
Comparing Examples 2 and 5 with Examples 3, 4, and 6, it is found that by using a mixture of waxes and resins as the fuel material, the water resistance is improved compared to when only waxes are used. Also, when comparing Examples 7 to 12 and Examples 1 to 6,
It is clear that coating the outer surface of a pressure-molded explosive with a hydrophobic substance dramatically improves its water resistance.

Next, when looking at the physical strength of pressure-molded explosives,
Comparing Examples 1 to 6 with Examples 7 to 12, it is clear that the coating on the outer surface makes the pressure-molded explosive less likely to break upon impact with the floor.

Furthermore, by comparing Examples 2 and 5 with Examples 34 and 6, or comparing Examples 7 and 10 with Examples 8, 9, 11, and 12, it was found that Fuchs was more effective than waxes alone. It has been observed that the physical strength is increased by using a mixture of resins.

Next, regarding the explosive performance, a comparison between Example 1 and Examples 2 and 3, and a comparison between Example 5 and Example 6 shows that fine porous sprills with a smaller particle size than the conventional porous sprill ammonium nitrate. By using ammonium nitrate, the explosive velocity value increases, which is favorable in terms of performance. Also, Examples]
Comparisons between and Example 5, Examples 2-4 and Example 6, or Examples 7-9 and Examples 10-12 show that the use of aluminum powder increases the explosion energy. , the explosive velocity value becomes faster and the explosive performance improves by -1.
-It is obvious that

Claims (1)

[Claims] 1. A pressure-molded explosive characterized by pressure-molding a mixture consisting of an oxidizing agent and a wax as a fuel substance. 2. Claim 1, characterized in that porous sprill ammonium nitrate with a particle size of 1.4 mm or less is used as the oxidizing agent.
Pressurized explosives as described in Section. 3. The pressure-molded explosive according to claim 1, further containing resin and/or metal powder as a fuel substance. 4. Claim 2, characterized in that porous sprill ammonium nitrate with a particle size of 1.4 mm or less is used as the oxidizing agent.
Pressurized explosives as described in Section. 5. The pressure-molded explosive according to claim 1, 2, 3, or 4, characterized in that the pressure-molded explosive is coated with a hydrophobic substance.