KR860002183B1 - Emulsion explosive - Google Patents

Abstract

A water-in-oil emulsion explosive compsn. which is capsensitive in small dia. charges, comprises (a) 50-90 parts of alkali metal nitrate and alkali earch metal nitrate such as ammonium nitrate, sodium nitrate and potassium nitrate, (b) 1-10 liquefiable carbonaceous fuel and wax, (c) 1-5 oil-soluble waterin-oil type emulsifier, and (e) 1-5 emulsification promoter comprising highly chlorinated paraffinic hydrocarbon such as plyester and polyamide. The compsn. is cheap and safe to mfr., store and transport, and can be detonated without the aid of a booster or primer.

Description

Oil-in-water type detonating emulsifier

The present invention is an emulsified explosive composition that is strong and does not contain gunpowder preservatives or organic preservatives, and is packaged in small diameters and detonated into one No. 6 primer and has good stability over time. The present invention relates to an emulsified explosive composition which is a water-in-oil type primer detonating agent which is a discontinuous phase (dispersed phase).

Conventional dynamite uses a sensitive substance such as nitroglycerin, which is extremely dangerous when the dynamite is frozen or leached into the packaging during storage, and thus requires attention to manufacture, transport and handling. Slurry explosives have been developed that have many disadvantages, such as causing headaches, but they have poor cold resistance such as insensitivity due to insensitivity at low temperatures, and the composition is monomethylamine nitrate, ethylene glycol mononitrate, triethylamine. Care should be taken in the preparation and handling of the preservatives by using water-soluble nitro compound presenters such as thiamine, Aldix, lead-free explosives, and metal preservatives such as aluminum powder and magnesium powder.

In addition, oxidants used in slurry water explosives are used in water-soluble form and solid state. Fuel and preservatives are water-soluble and non-water soluble in solid powder, so that the oxidant, fuel and preservative mixtures are liquid-high and liquid-liquid uneven. It becomes an image.

In this heterogeneous phase, the contact area between the oxidant and the fuel is not large and sensitivity is lowered. Therefore, a preservative is required. A viscous agent is used to prevent separation of the oxidant, fuel, and the preservative, and a crosslinking agent is required to improve molding.

However, the composition of the present invention is a liquid-liquid homogeneous phase in which liquid fuel oil, which is a solid and a liquid, and an oxidizing agent solution are liquefied and mixed uniformly.

In other words, the oil and oxidant aqueous solution that do not mix with each other are mixed well with a surfactant, so that no crosslinking agent or viscous agent is needed and no preservative is included. It is triggered by a call primer. It is insensitive to heat and fire and does not detonate during combustion, and it has good after-gas, so it can be used in the gangway, and cold resistance pressure resistance is superior to slurry explosive.

All compositions used in the present invention, except for the density control agent, are used in the liquid state or in the liquid state so that the particle size of the dispersed phase is less than 1 micron, and the thickness of the continuous membrane is determined to be close to the molecular size of the continuous phase. By increasing the ratio of interfacial emulsion to internal emulsion of the nucleus, the dispersed phase, which is solid at room temperature, is stable in the dissolved state, and the equilibrium membrane between the interfaces has high viscosity, thus improving stability over time, and expanding the contact area between the continuous phase and the dispersed phase. The reaction surface is increased, and the primer 6 is detonated without a preservative, which causes excellent performance.

The oxidizing agent used in the present invention mainly uses ammonium nitrate, sodium nitrate and calcium nitrate, which are nitrates of alkali metal alkaline earth metal, and some may be replaced with perchlorate.

The fuel oil mainly uses carbonaceous fuel oil and wax, but should be liquefied at 50-80 ° C. Mineral oil and lubricating oil are also used. Emulsifiers are lipophilic ester compounds that are more lipophilic than hydrophilic and are sorbitan monooleate, sorbitan palmitate Using sorbitan laurate, di-pentaerythritol oleate, and the like, glass microcrystalline or perlite is used as the density adjusting agent. In addition, emulsifying stabilizers are used to increase the stability over time, which is a multimer (Copolymer, for example, polyester or polymite compound, etc.) in which a hydrophilic group and a lipophilic group coexist with a molecular weight of 500-15,000.

Example 1

60 parts of ammonium nitrate, 10 parts of sodium nitrate, and 15 parts of water are placed in Reactor 1 and heated to maintain 70 ° C. Next, reactor 3, 3 parts of microversein wax, 3 parts of sorbitan fatty acid ester (monooleate) and 2 parts of emulsion stabilizer (polyester compound) were heated to 50 ° C., and then the contents of reactor 1 were removed. Place in the reactor and stir at high speed for 2 minutes to mix uniformly. The mixture is transferred back to the admixture, and 8 parts of perlite (density regulator) are added to adjust the density while stirring at low speed. The composition thus prepared is packaged in polyethylene, processed paper and the like, and the explosive diameter is 25 mm or more.

Example 2

65 parts of ammonium nitrate, 7 parts of calcium nitrate, 10 parts of water were added to Reactor 1 and heated to 70 ° C., followed by 5 parts of paraffin oil, 2 parts of paraffin wax, 3 parts of dipentaerythritol mono palmitate and polyamide compound in another reactor 2. After heating 3 parts of the emulsifying stabilizer to 50 ° C. Put the contents of the reactor 1 here and mix uniformly while stirring at high speed. Transfer it to the admixture and adjust the density by adding 5 parts of density regulator (Grass micro-crystallin) with low speed stirring. The composition thus prepared is packaged in polyethylene and processed paper and the like, and the explosive diameter is 25 mm or more.

The explosives prepared in this way were detonated by one primer No. 6, specific gravity 1.0-1.3, biphasic force 65-80% compared to gelatin dynamite, and detonation rate was 4,500-5,500 meters per second.

Claims (1)

50-90 parts of alkali and alkaline earth metal nitrates such as ammonium nitrate, sodium nitrate, calcium nitrate, 5-20 parts of water, 1-10 parts of fuel oil and wax, 1-5 parts of sorbitan fatty acid ester, pentaerythritol A water-in-oil type primer detonating agent composition which forms 1-5 parts of a multimer emulsification stabilizer and 1-5 parts of density regulators, such as a fatty acid ester, in an oil phase.