JP2000203979A - Production of hydrous explosive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily produce a hydrous explosive with high safety by emulsifying or mixing a composition consisting of an oxidizer, water, a fuel and an emulsifier or a thickener using ultrasonic waves. SOLUTION: In the composition, ammonium nitrate or the like is used as the oxidizer, paraffin or the like as the fuel, sorbitan resin acid esters or the like as the emulsifier and guar gum or the like as the thickener. An emulsion explosive is produced as follows; a vessel housing an aqueous oxidizer solution is heated to prepare an aqueous oxidizer solution in which the oxidizer is completely dissolved. A vessel housing a mixture of oils as a fuel and an emulsifier is heated to form a solid-free liquid state. The ultrasonic oscillation part of an ultrasonic device is put in the fuel mixture-containing vessel about 15 mm below the surface of the liquid and the aqueous oxidizer solution is poured into the vessel while operating the ultrasonic device at about 20 kHz oscillation frequency and 400 μA. During this time, ultrasonic waves are continuously applied for about 5 min.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a water-containing explosive for industrial use, and more particularly, to civil engineering and construction.
Mining industries such as crushed stone, mining, coal mining, tunnel excavation;
The present invention relates to a method for producing a hydrous explosive used for cutting, blasting, excavating, and the like in the fields of agriculture and forestry such as irrigation, clearing, root removal, and logging; and in the marine field such as removal of undersea weeds and mud.

[0002]

2. Description of the Related Art Conventional industrial explosives include slurry explosives and emulsion explosives. As a method for producing a slurry explosive, guar gum or the like is added to an aqueous solution of 30 to 40 ° C. mixed with monomethylamine nitrate, water, ammonium nitrate and a foaming agent as described in the specification of JP-A-60-131890. A method is known in which a viscosity modifier, sodium nitrate, is added, and then the fuel and the crosslinking agent are uniformly mixed by mechanical stirring to form a slurry explosive. As disclosed in JP-A-59-78994, a method for producing an emulsion explosive is to use ammonium nitrate, sodium nitrate and water for about 1 hour.
A high-temperature oxidizing agent aqueous solution prepared by heating to around 00 ° C.
A method is known in which a W / O emulsion explosive is rapidly stirred at 1000 to 2000 rpm while being gradually added to a molten mixture of an emulsifier and a wax at about 100 ° C.

[0003]

However, since a sharpening agent such as nitroglycerin contained in dynamite is not used in a slurry explosive, an emulsion explosive, or the like, if the product is produced in a non-uniform state, the product may not be used. A great deal of effort has been expended on improving the stirring method and apparatus for uniformly mixing the components, since the performance quality is significantly reduced. In particular, a high-concentration oxidizing agent aqueous solution, a fuel such as paraffin, and an emulsifier are emulsified by high-speed stirring at a high temperature of about 100 ° C. without containing a reaction accelerator (a sharp sensitivity agent) of an oxidizing agent such as monomethylamine nitrate. In the case of an emulsion explosive manufactured by mixing, the performance quality remarkably fluctuates depending on the stirring method such as the temperature of the medicine and the stirring speed during emulsification and mixing, and the quality of the emulsifier. For this reason, the production conditions such as the stirring method, the quality of the emulsifier, and the like are carefully selected and controlled so as not to deviate from an appropriate range. However, due to seasonal temperature changes and variations in raw material quality, etc., often the stirring method and the quality of the emulsifier are manufactured out of the appropriate range, so during storage without forming a good emulsion structure, The emulsion structure is broken,
Crystals are crystallized from a part of the high-concentration oxidizer aqueous solution, and the detonation performance as an explosive deteriorates, causing unexploded residue at the blasting site and impairing the safety of the blasting site. Problems to be solved such as the problem of having to adopt an extremely dangerous manufacturing method such as high-speed stirring and emulsification of an oil agent or an emulsifier in a high temperature region in a high sensitivity state where crystals do not crystallize from Was left.

On the other hand, since no sensitizing agent such as nitroglycerin is used in the slurry explosive, a monomethylamine nitrate or an oxidizing agent aqueous solution and a thickener are uniformly used so as not to form mamako (fuzzy). Mixing is essential to producing high quality explosives. However, due to the fact that it adheres to the stirring vessel and stirring blades in mechanical stirring, and the dispersion of the addition conditions, the thickener becomes poorly dispersed, causing mamako, which impairs the uniformity of the composition and lowers the quality of the explosive. In order to induce the production, the production temperature, the production pH, the stirring conditions and the like are highly controlled. As a result, there are problems to be solved, such as an increase in manufacturing costs required for management, and the fact that explosives, which are often out of control limits, are manufactured and detonation performance is reduced, causing unexploded residue at a blasting site. Was.

Accordingly, an object of the present invention is to provide a safe and convenient method for producing explosives which solves the above-mentioned problems.

[0006]

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, the use of ultrasonic waves is safer and simpler than conventional mechanical stirring methods with a simple apparatus and method. The present inventors have found a production method in which the components are uniformly emulsified or mixed in a short time, and have accomplished the present invention. That is, the present invention relates to the following method for producing a hydrous explosive using ultrasonic waves for mixing and emulsifying explosive components.

(1) The above-mentioned composition comprising a step of emulsifying or mixing a composition comprising an oxidizing agent, water, fuel, an emulsifying agent, or an oxidizing agent, water, fuel, and a thickening agent using ultrasonic waves. A method for producing a hydrous explosive made of a substance. (2) The method for producing a water-containing explosive according to claim 1, wherein the oscillation frequency of the ultrasonic wave is 18 to 33 KHz.

(3) The method for producing a water-containing explosive according to claim 1 or 2, wherein the fuel is a liquid. (4) (1), (2) or (3), wherein emulsification or mixing of the composition is carried out by heating by ultrasonic irradiation.
Method for producing hydrous explosives. It should be noted that in the present invention, the production (emulsification and mixing) by ultrasonic waves can be performed by emulsifying and mixing the raw materials without substantially requiring mechanical stirring by a conventional stirring blade or the like. The components can be made uniform without having to rotate the explosive at high speed with the stirring blades, making it possible to manufacture safely without worrying about unexpected situations such as the stirring blades coming off during manufacturing. When a small amount of liquid contained in an oxidizing agent aqueous solution or liquid fuel is irradiated with ultrasonic waves, the oxidizing agent aqueous solution or liquid fuel dissolves with a rise in temperature, and is emulsified in a few minutes, showing practical performance. Since explosives can be manufactured, advanced technologies and facilities such as dissolving tanks for oxidizing agent aqueous solutions and fuels, which were indispensable for conventional emulsion explosive manufacturing, are not only reduced or unnecessary, but also a small number of small ultrasonic devices are required. Conventional by combining From the batch method has been employed in water gel explosive, it is that it enables conversion to a small amount continuous production method.

Furthermore, emulsion explosives produced while controlling the ultrasonic irradiation conditions and the rise in liquid temperature due to the ultrasonic irradiation with an external bath such as industrial water or the like are more effective than those obtained by the conventional mechanical high-speed stirring method. In addition, it is possible to provide a low-cost, high-quality emulsion explosive because the texture is fine and the storage stability of performance quality tends to be excellent. Furthermore, the use of ultrasonic waves in a mixed solution of ammonium nitrate, a mixture of wax and emulsifier, and water makes it possible to produce high-quality emulsion explosives very easily even at the blasting site due to downsizing of the device and safety of production. In addition to this, by irradiating the container for storing the raw material components of the emulsion explosive with ultrasonic waves, the stored raw material can be made into an emulsion to have the performance as an explosive.

The remarkable effect of using ultrasonic waves in the slurry explosive is a dispersion step of a thickener such as guar gum, which greatly improves the dispersion state of the thickener and explodes the product. That is, quality such as performance can be improved.
The oscillation frequency of the ultrasonic device of the present invention is not particularly limited because it can be used in any region, but preferably is 18 to 33.
KHz. When the frequency is 18 KHz or less, it is difficult to produce a high-quality emulsion in a short time, and when the frequency is 33 KHz or more, equipment required for controlling the production temperature increases in cost.

As the oxidizing agent used in the present invention, those known in the technical field of explosives can be used. For example, ammonium, alkali metal, inorganic acid such as nitric acid, chloric acid, perchloric acid, etc.
It is a salt of an alkaline earth metal or the like, and can be selected alone or in combination. Among them, ammonium nitrate is a good oxidizing agent which is inexpensive and highly reactive.Even though ammonium nitrate alone can give a practical explosive property, when sodium nitrate is used in combination, a stable good primer detonating property is obtained, and potassium nitrate and potassium sulfate are used. In combination, the remarkably improved detonation property can be obtained.

The water used in the present invention may be general industrial water. It is more preferable to remove impurities. As the fuel used in the present invention, those known in the technical field of explosives are used. For example, paraffin, liquid paraffin, vegetable oil, light oil, coal powder, asphalt, Gilsonite, tire powder, sulfur, aluminum powder, flour, sucrose,
Molasses, glucose, fructose, lactic acid, sodium lactate gluconic acid, glycine, citric acid, sodium saccharin, thiourea, urea, fine resin particles, and the like can be used alone or in combination. For the production of the emulsion explosive of the present invention, a fuel that is liquid at room temperature or liquid at about 50 ° C. even if solid at room temperature is preferable. In the case of slurry explosives, those which are easily soluble in water or those in the form of fine powder are preferred.

The emulsifier of the present invention is not particularly limited, and includes all conventionally known emulsifiers for forming a W / O emulsion. For example, sorbitan fatty acid esters, glycerin fatty acid esters, polyoxyalkylene fatty acid esters, oxazoline derivatives, imidazoline derivatives, phosphate esters, alkali or alkaline earth metal salts of fatty acids, primary, secondary and tertiary amines or , Primary, secondary and tertiary amine nitrates or acetates. These emulsifiers are used as one kind or as a mixture of two or more kinds.

The thickeners of the present invention include known thickeners conventionally used for hydrous explosives. For example, guar
Gum, locust bean gum, guar gum derivative,
Natural or synthetic high molecular compounds such as cast bean gum derivatives, xanthan gum, and polyacrylamide derivatives.
These thickeners are used alone or in combination of two or more. The crosslinking agent for the thickener includes antimonates, chromates, borates and the like.

As the foaming agent of the present invention, known inorganic and organic fine hollow bodies used in conventional slurry explosives and emulsion explosives are used. For example, inorganic fine hollow bodies include perlite, shirasu balloon, glass micro balloon, and the like, and organic fine hollow bodies include thermoplastic vinylidene chloride-acrylonitrile copolymer and methyl methacrylate. It is obtained by foaming fine particles containing a low-boiling hydrocarbon in a tri-acrylonitrile copolymer or the like.

The shape and particle size of the foaming agent used in the present invention are not particularly limited. However, if the surface of the sphere becomes rough or the diameter increases, the crystal growth of a high-concentration salt solution comprising an oxidizing agent and water is promoted. , Which hinders the performance over time. Preferably, the surface is easily wetted by water or the surface is smooth. The preferred particle size is 1000 microns or less, more preferably 1 micron.
Those having a size of not more than 00 microns are 50% by weight or more.

As the cross-linking agent of the present invention, a known cross-linking agent such as pyroantimony generally used for slurry explosives is used. As an example of the composition of the water-containing explosive produced according to the present invention, in the case of an emulsion explosive, ammonium nitrate is 40 to 60% by weight, sodium nitrate is 0 to 18% by weight, water is 2 to 30% by weight, and wax is 1 to 6% by weight. 0.5 to 5% by weight of emulsifier,
The foaming agents are 0-2, and the slurry explosives include monomethylamine nitrate 15-40% by weight, ammonium nitrate 35-70% by weight, sodium nitrate 5-15% by weight, pigment aluminum powder 0-3% by weight, guar gum 0.5 to 2% by weight, a foaming agent 0.5 to 30% by weight, and a crosslinking agent 0.005 to 0.02% by weight.

As a specific example of a method for producing an emulsion explosive, a container containing an oxidizing agent aqueous solution is heated to obtain an oxidizing agent aqueous solution in which the oxidizing agent is completely dissolved. Next, the container containing the mixture of the oil and the emulsifier, which is a fuel, is heated to a solid-free liquid state, and the liquid level of the fuel or the like is reduced to about 15 below the liquid level in the container.
mm, an ultrasonic oscillation unit (hereinafter abbreviated as a chip) of the ultrasonic device is inserted thereinto, and the oscillation frequency of the ultrasonic device is
A method for producing an emulsion explosive in which an oxidizing agent aqueous solution is poured into a container for storing fuel or the like while operating at 400 μA, and is continuously irradiated with ultrasonic waves for about 5 minutes. Insert the tip of the ultrasonic device about 15 mm below the liquid level in the container containing the solid-liquid fuel and the emulsifier, and set the oscillation frequency to about 30 KHz.
Operating at 00 μA, the heat and the like generated by the ultrasonic irradiation dissolve the fuel and the like in the container, so that there is no solid content. Next, a method of manufacturing an emulsion explosive, in which the dissolved oxidizing agent aqueous solution is poured into a storage container for fuel or the like during ultrasonic irradiation, and is operated for about 7 minutes. The solid-liquid fuel and the oxidizing agent aqueous solution containing undissolved components are stored in a container with an external bath device that can arbitrarily cool and heat, and a chip of an ultrasonic device with a cooling device is placed below the liquid level in the container. Insert about 15mm,
While adjusting the liquidity in the container, the oscillation frequency is about 20 KHz,
A method for producing an emulsion explosive manufactured by operating at 400 μA for about 10 minutes. A mixture of a fuel and an emulsifier heated to a temperature at which the liquid becomes sufficiently liquid and an aqueous solution of the oxidizing agent completely dissolved are prepared in separate containers. Then, after adding a fuel or the like to the container containing the oxidizing agent aqueous solution, the tip of the ultrasonic device is inserted about 15 mm below the liquid level in the container, and the oscillation frequency is about 20 KHz, 400 μA for about 5 minutes. A method of manufacturing an emulsion explosive to be operated and manufactured. Insert the tip of the ultrasonic device 15 mm below the liquid level in the container containing the oxidizing agent aqueous solution containing undissolved salt, and oscillate at a frequency of about 20 KH.
While operating at 400 μA at z, the liquid temperature is raised by the heat generated by the ultrasonic irradiation to dissolve the undissolved salts, and then the mixture of the totally dissolved fuel and emulsifier is added into the oxidizing agent aqueous solution.
Thereafter, a method for producing an emulsion, which is produced by operating an ultrasonic device for about 5 minutes. The container containing the oxidizing agent aqueous solution is heated to obtain an oxidizing agent aqueous solution in which the oxidizing agent is completely dissolved. Next, the container containing the mixture of the oil and the emulsifier as the fuel is heated to a solid-free liquid state, and the tip of the ultrasonic device is inserted about 15 mm below the liquid level in the container for the fuel and the like, and the oscillation frequency is increased. While operating at about 20 KHZ, 400 μA,
A method for producing an emulsion explosive by pouring an aqueous solution of an oxidizing agent into a container for storing fuel or the like, continuously irradiating ultrasonic waves for about 3 minutes, and then performing mechanical stirring at a low speed. Monomethylamine nitrate, water, ammonium nitrate and foaming agent about 30-40
15m below the liquid level in the container containing the mixed solution whose temperature has been adjusted to ℃
Insert the tip of ultrasonic device into m and oscillate at about 20K
While operating at 400 μA in HZ, the mixture of sodium nitrate and the thickener was added, and the ultrasonic device was operated for about 5 minutes to uniformly disperse the mixture in the mixed solution. A method for producing a slurry explosive, which comprises mixing residual components such as aluminum powder by mechanical stirring, which is a conventional method.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.

[0020]

Example 1 4.5% by weight of solid paraffin (trade name of Wako Pure Chemical Industries; paraffin), 0.5% by weight of liquid paraffin (trade name of Ishizu Pharmaceutical; liquid paraffin reagent grade 1), emulsifier (trade name of Kao Corporation) Exel 400) 55% by weight of ammonium nitrate (manufactured by Mitsubishi Kasei), 8% by weight of sodium nitrate (manufactured by Mitsubishi Kasei), 30% of water (industrial water)
An ultrasonic homogenizer (ULTRASONIC GENER) is added to a mixed solution to which a clear aqueous solution of oxidizing agent of weight% is added.
ATOR MODEL-US; manufactured by Nippon Seiki Seisakusho) is inserted under the liquid level, the homogenizer is operated at 400 μA for about 5 minutes, and an emulsion explosive having a specific gravity of 1.20 is produced at a production temperature of about 50 ° C. Obtained. Thereafter, the above-mentioned emulsion explosive was packed in a JIS G3452 steel pipe (tube length: 350 mm), detonated with a booster of 30 g (3 Kiri dynamite), and a No. 6 electric detonator.
The explosion velocity was measured by the method of S-41 (2), and was measured at 4300 m / s.
Explosion speed value.

[0021]

Example 2 4.5% by weight of solid paraffin (trade name, manufactured by Wako Pure Chemical Industries; paraffin), 0.5% by weight of liquid paraffin (trade name, manufactured by Ishizu Pharmaceutical Co., Ltd .; liquid paraffin reagent class 1), emulsifier (trade name, manufactured by Kao) EXCEL 400) An ultrasonic homogenizer (ULTRASONIC GENERATORM) is added to a fuel component obtained by dissolving and mixing 2% by weight of a fuel component.
(ODDEL-US; manufactured by Nippon Seiki Seisakusho) is inserted below the liquid level, and while the homogenizer is operated at 400 μA, 55% by weight of nitric acid (manufactured by Mitsubishi Kasei) and 8% by weight of sodium nitrate (manufactured by Mitsubishi Chemical) , Water (industrial water) 30
A mixture containing an undissolved salt in an amount of 1% by weight was added little by little, and about 7 minutes after completion of the addition, an emulsion explosive having a specific gravity of 1.20 was obtained. After that, the above-mentioned emulsion explosive was replaced with JIS G
3452 steel pipe (pipe length 350mm) tightly packed, booster
A 30 g (3 paulownia dynamite) detonated with a No. 6 electric detonator, and the explosion velocity was measured by the method of the Japanese Pharmacopoeia Standard ES-41 (2) to obtain a detonation velocity value of 4500 m / s.

[0022]

Example 3 4.5% by weight of solid paraffin (trade name, manufactured by Wako Pure Chemical Industries; paraffin), 0.5% by weight of liquid paraffin (trade name, manufactured by Ishizu Pharmaceutical Co., Ltd .; liquid paraffin reagent class 1), emulsifier (trade name, manufactured by Kao) Excel 400) 2% by weight, nitric acid (Mitsubishi Chemical) 55% by weight, sodium nitrate (Mitsubishi Chemical)
8% by weight and 30% by weight of water (industrial water) in a sealed polyethylene cartridge (cylinder diameter 35 mm, cartridge length 330)
mm) in a water bath at about 50 ° C., and then an ultrasonic homogenizer (ULTRASONIC GENEATOR).
MODEL-US; manufactured by Nippon Seiki Seisakusho), and inserted into the above-mentioned water bath solution.
While operating at 0 μA, apply ultrasonic waves to the
By irradiating for a minute, an emulsion explosive is produced in the cartridge. After that, the cartridge for storing the above-mentioned emulsion explosive was JIS
G3452 steel pipe (tube length: 350 mm) was tightly packed, detonated with a booster of 30 g (3 Kiri dynamite), No. 6 electric detonator, and the explosion velocity was measured by the method of the Japanese Pharmacopoeia Standard ES-41 (2). / S explosion velocity value was obtained.

[0023]

Example 4 Wax (trade name of Nippon Seisaku; Hi-Hi)
c1045) 60% by weight of nitric acid (Mitsubishi Kasei), and 18% by weight of sodium nitrate (Mitsubishi Chemical) %, Water (industrial water) 15
An ultrasonic homogenizer (ULTRASONIC GENER) is added to a mixed solution to which a clear aqueous solution of oxidizing agent of weight% is added.
The tip of the tip of ATOR MODEL-US (manufactured by Nippon Seiki Seisakusho) is inserted below the liquid surface, and the homogenizer is operated at 400 μA for about 5 minutes to obtain an emulsion explosive having a specific gravity of 1.20 at a production temperature of about 90 ° C. Was. Thereafter, the above-mentioned emulsion explosive was transferred to a JIS G3452 steel pipe (pipe length 3).
50 mm), detonated with a No. 6 electric detonator, measured the explosion speed by the method of the Pharmacopoeia Standard ES-41 (2), and
A detonation velocity value of 00 m / s was obtained.

[0024]

Example 5 Wax (trade name, manufactured by Nippon Seisaku; Hi-Hi)
c1045) An ultrasonic homogenizer (ULTRASOSO) was added to a fuel component obtained by dissolving and mixing 5% by weight of an emulsifier (trade name, manufactured by Kao; Exel 400) and 2% by weight.
The tip of a chip of NIC GENEATORMODEL-US (manufactured by Nippon Seiki Seisakusho) is inserted below the liquid surface, and while the homogenizer is operated at about 400 μA, 73% by weight of nitric acid (manufactured by Mitsubishi Kasei), nitric acid is contained in the fuel component. Sodium (Mitsubishi Chemical) 15% by weight, water (industrial water) 5
A mixture containing a small amount by weight of undissolved salt was added little by little, and a granular emulsion explosive having a hard drug substance was obtained about 20 minutes after the addition was completed. After that, the above explosive was replaced with JIS G34
52 steel pipe (tube length 350mm) tightly packed, booster-30
g (3 Tung Dynamite), detonated with No. 6 electric detonator,
The explosion velocity is measured by the method of the Japanese Pharmacopoeia Standard ES-41 (2),
A detonation velocity of 5500 m / s was obtained.

[0025]

Example 6 4.5% by weight of solid paraffin (trade name of Wako Pure Chemical Industries; paraffin), 0.5% by weight of liquid paraffin (trade name of Ishizu Pharmaceutical; liquid paraffin reagent grade 1), emulsifier (trade name of Kao Corporation) EXCEL 400) An ultrasonic homogenizer (ULTRASONIC GENERATORM) is added to a fuel component obtained by dissolving and mixing 2% by weight of a fuel component.
(ODDEL-US; manufactured by Nippon Seiki Seisakusho) is inserted under the liquid level, and while the homogenizer is operated at about 400 μA, 75% by weight of nitric acid (manufactured by Mitsubishi Chemical) and sodium nitrate are contained in the fuel component. A mixture containing a small amount of undissolved salt of 15% by weight (manufactured by Mitsubishi Kasei) and 3% by weight of water (industrial water) was added little by little, and about 25 minutes after completion of the addition, a granular emulsion explosive having a hard drug substance was obtained. Thereafter, the explosive was packed in a JIS G3452 steel pipe (tube length: 350 mm), detonated with a booster of 30 g (3 Kiri dynamite), an electric detonator of No. 6, and subjected to the method of the Japanese Pharmacopoeia Standard ES-41 (2). The explosion velocity was measured, and an explosion velocity value of 5200 m / s was obtained.

[0026]

Example 7: Nitric acid (Mitsubishi Chemical) 60% by weight, sodium nitrate (Mitsubishi Chemical) 18% by weight, water (industrial water) 15
An ultrasonic homogenizer (ULTRASONIC GENER) is added to a mixed solution to which a clear aqueous solution of oxidizing agent of weight% is added.
ATOR MODEL-US (manufactured by Nippon Seiki Seisaku-Sho, Ltd.) is inserted under the liquid level, and the homogenizer is set to 4
While operating at 00 μA, a fuel component obtained by dissolving and mixing 5% by weight of wax (trade name, manufactured by Nippon Seiwa; Hi-Hic1045) and 2% by weight of emulsifier (trade name, manufactured by Kao; Exel 400) is added to the oxidizing agent aqueous solution. About 1 under natural cooling
The mixture was operated for 0 minutes to produce an emulsion explosive having a specific gravity of 1.20 at a production temperature of about 90 ° C. Further, a foaming agent (Ichi Kasei's trade name; MSD5021) was added and mixed with the above-mentioned emulsion explosive by 5% by weight. An emulsion explosive having a specific gravity of 1.13 was obtained. Then, the explosive was placed in a paper cylinder (package diameter 30m).
m, a drug length of 300 mm), detonated with a No. 6 electric detonator, and measured the explosion velocity by the method of the Pharmacopoeia Standard ES-41 (2) to obtain a detonation velocity value of 5300 m / s.

[0027]

Comparative Example 1 4.5% by weight of solid paraffin (trade name of Wako Pure Chemical Industries; paraffin), 0.5% by weight of liquid paraffin (trade name of Ishizu Pharmaceutical; liquid paraffin reagent grade 1), emulsifier (trade name of Kao) Excel 400), a homogenizer (BIO M
IXERABM type; manufactured by Nippon Seiki Seisakusho Co., Ltd.), while operating at about 500 to 1000 rpm by inserting the tip of a green cell, 55 parts of nitric acid (Mitsubishi Chemical), 8 parts of sodium nitrate (Mitsubishi Chemical), water (industrial water) A mixture containing 30 parts of undissolved salt was added little by little, and the mixture was stirred for about 30 minutes from the end of the addition to obtain an emulsion explosive containing undissolved salt. After that, the above-mentioned emulsion explosive was tightly packed in a JIS G3452 steel pipe (350 mm in length), detonated with a booster 30 g (3 Tung Dynamite, No. 6 electric detonator), and subjected to the method of the Japanese Pharmacopoeia Standard ES-41 (2). The explosion velocity was measured, but the emulsion explosive did not explode, so the explosion velocity value could not be measured.

[0028]

[Comparative Example 2] 60% by weight of nitric acid (manufactured by Mitsubishi Kasei), 18% by weight of sodium nitrate (manufactured by Mitsubishi Kasei), 15% of water (industrial water)
Into a mixed solution to which a clear aqueous solution of oxidizing agent of weight% is added, the tip of the green cell of a MONIZER (BIO MIXERABM type; manufactured by Nippon Seiki Seisakusho) is inserted to about 500 to 100.
While operating at 0 rpm, a fuel component obtained by dissolving and mixing 5% by weight of a wax (trade name, manufactured by Nippon Seiro; Hi-Hic1045) and 2% by weight of an emulsifier (trade name, manufactured by Kao; Exel 400) is added to the oxidizing agent aqueous solution. About 3 under natural cooling
The mixture was operated for 0 minute to produce an emulsion explosive having a specific gravity of 1.25 at a production temperature of about 70 ° C. Further, a foaming agent (Ichi Kasei's trade name; MSD5021) was added and mixed with the above-mentioned emulsion explosive by 5% by weight. An emulsion explosive having a specific gravity of 1.15 was obtained. After that, the explosive is placed in a medicine envelope (a medicine envelope diameter of 30).
mm, drug length 300 mm), and detonated with a No. 6 electric detonator, but the emulsion explosive did not detonate. Because of this, the explosion velocity could not be measured.

[0029]

According to the production method of the present invention, unlike the conventional method of mixing components with high-speed stirring, which is employed for emulsion explosives and slurry explosives, which are water-containing explosives, it is said that ultrasonic waves are irradiated. Since the homogenization of the components can be realized in a very simple manner in a short time, the advanced production technology and large-scale production equipment required for conventional emulsions and slurry explosives are not only unnecessary, but also the production work is not required. The safety is also dramatically improved, and the performance quality obtained is also improved. Accordingly, the frequency of occurrence of unexploded residue of the hydrous explosive generated at the blasting site is reduced, and the safety of the blasting operation is improved.

Claims (4)

[Claims] 1. A composition comprising an oxidizing agent, water, fuel, an emulsifier, or a step of emulsifying or mixing a composition comprising an oxidizing agent, water, fuel, and a thickener using ultrasonic waves. A method for producing a hydrous explosive comprising: 2. The ultrasonic oscillation frequency is 18 to 33 KHz.
The method for producing a hydrous explosive according to claim 1, wherein 3. The method for producing a hydrous explosive according to claim 1, wherein the fuel is a liquid. 4. The method for producing a water-containing explosive according to claim 1, wherein the emulsification or mixing of the composition is carried out by heating by ultrasonic irradiation.