GB2296270A - Non-explosive breaking composition - Google Patents
Non-explosive breaking composition Download PDFInfo
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- GB2296270A GB2296270A GB9525356A GB9525356A GB2296270A GB 2296270 A GB2296270 A GB 2296270A GB 9525356 A GB9525356 A GB 9525356A GB 9525356 A GB9525356 A GB 9525356A GB 2296270 A GB2296270 A GB 2296270A
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- antioxidant
- explosive
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- 239000000203 mixture Substances 0.000 title claims abstract description 33
- 239000002360 explosive Substances 0.000 title claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 239000002245 particle Substances 0.000 claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- 239000000428 dust Substances 0.000 claims abstract description 21
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000005751 Copper oxide Substances 0.000 claims abstract description 18
- 229910000431 copper oxide Inorganic materials 0.000 claims abstract description 18
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 13
- 235000011126 aluminium potassium sulphate Nutrition 0.000 claims abstract description 13
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 13
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229940050271 potassium alum Drugs 0.000 claims abstract description 13
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 claims abstract description 13
- 239000008117 stearic acid Substances 0.000 claims abstract description 13
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 claims abstract description 9
- 229940063655 aluminum stearate Drugs 0.000 claims abstract description 9
- 239000010419 fine particle Substances 0.000 claims abstract description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 6
- 229910021538 borax Inorganic materials 0.000 claims abstract description 5
- 238000002425 crystallisation Methods 0.000 claims abstract description 5
- 230000008025 crystallization Effects 0.000 claims abstract description 5
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 5
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 4
- 150000002484 inorganic compounds Chemical class 0.000 abstract description 2
- 229910010272 inorganic material Inorganic materials 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 17
- 238000002485 combustion reaction Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 238000002156 mixing Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 4
- 229930006000 Sucrose Natural products 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229960004793 sucrose Drugs 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000005956 Metaldehyde Substances 0.000 description 3
- 235000011124 aluminium ammonium sulphate Nutrition 0.000 description 3
- LCQXXBOSCBRNNT-UHFFFAOYSA-K ammonium aluminium sulfate Chemical compound [NH4+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCQXXBOSCBRNNT-UHFFFAOYSA-K 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- GKKDCARASOJPNG-UHFFFAOYSA-N metaldehyde Chemical compound CC1OC(C)OC(C)OC(C)O1 GKKDCARASOJPNG-UHFFFAOYSA-N 0.000 description 3
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 3
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 241000080590 Niso Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000007415 particle size distribution analysis Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/009—Wetting agents, hydrophobing agents, dehydrating agents, antistatic additives, viscosity improvers, antiagglomerating agents, grinding agents and other additives for working up
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/16—Other methods or devices for dislodging with or without loading by fire-setting or by similar methods based on a heat effect
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Disintegrating Or Milling (AREA)
- Medicinal Preparation (AREA)
- Powder Metallurgy (AREA)
Abstract
A non-explosive breaking composition for breaking rock or concrete includes 100 parts by weight of a thermit mixture which consists of 15-30 wt% of aluminum powder containing 95% or more of fine particles having a particle diameter of 44 mu m or below, a dust scattering preventing agent and an antioxidant, and 70-80 wt% of copper oxide containing 95% of more of fine particles having a particle diameter of 74 mu m or below; and 80-120 parts by weight of a cracked gas generator. The aluminum powder is preferably dedust aluminum containing 2 wt% or below of polytetrafluoroethylene as the dust scattering preventing agent and 1-2 wt% of stearic acid or aluminum stearate as the antioxidant. The cracked gas generating agent is preferably an inorganic compound having water of crystallization, such as potassium alum excluding borax, which generates steam with application of a high temperature.
Description
NON- EXPLOSIVE BREAKING COMPOSITION
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
This invention relates to a non- explosive breaking composition for instantaneously breaking brittle bodies such as concrete structures and base rocks with less vibration and less noisy
DESCRIPTION OF THE RELATED ART
Conventional destruction of brittle bodies such as concrete structures and base rocks has mainly used explosive compounds or concrete breaking machines for which explosives are applied. Besides, swelling breaking agents mainly consisting of lime have been proposed and put on the market.
They all have both advantages and disadvantages. For instance, explosives have a high efficiency in breaking brittle bodies such as base rocks, but some of them cause very strong vibrations and big noises when exploded. And, to use the explosives, a consumption permit is required. Thus, they cannot be easily used for destruction in trial and error.
On the other hand, the swelling breaking agents do not cause strong vibrations or big noises and can be used readily because a consumption permit is not required. However, they takes a long time to complete the reaction, resulting in a poer breaking efficiency. Thus, they are far inferior to the methods using the explosives
To remedy the disadvantages of the above two types and to provide a method excelling in breaking efficiency, there is available a low- vibration and small- noise breaking agent (GANSIZER produced by Nippon Koki Co., Ltd.) which is a non- explosive breaking agent (Japanese Patent
Application Laid- open Print No. 2-204384).
The above breaking agent provides a method for quickly breaking brittle bodies in the same way as the breaking method which uses the explosives, but does not need a consumption permit It is an outstanding breaking agent which can be used by field workers without giving a feeling of unfamiliarity.
The above breaking agent is a composition consisting of aluminum, copper oxide and a cracked gas generating agent.
Here, aluminum is a reducing agent for a thermit mixture and is reacted with copper oxide which is an oxidizing agent, to initiate a thermit reaction which has a quick reaction rate and generates a high reaction heat Thus, the cracked gas generating agent is decomposed in a short time to instantaneously generate a pressure higher than a breaking strength of a brittle body, resulting in the breakage of the brittle body.
Therefore, it is to be understood that the breaking performance of the above breaking agent is not heavily affected by the thermit reaction.
But, aluminum used for the thermit reaction is required to be very fine and have a large surface area in order to increase the reaction rate and to provide good reactivity.
Aluminum having such a large surface area is oxidized very easily, and when oxidized once, the thermit reaction does not generate a sufficient reaction heat, the reaction rate is decreased, the amount of heat is insufficient to decompose the cracked gas generating agent, and the brittle body may not be broken.
Thus, the change in chemical and physical properties of material itself is generally referred to as a change with time, and the performance may be heavily deteriorated due to the change with time.
As described above, since aluminum used is a fine powder, dust is raised when producing aluminum powder, and in the worst case, there is a risk of dust explosion.
SUMMARY OF THE INVENTION
The invention has been completed to remedy the above disadvantages, and aims to provide a breaking composition consisting of non- explosive components, which is very stable with time, superior in safety during the production and handling, and produces less vibration and less noise.
To accomplish the above object, Claim 1 of the invention includes 100 parts by weight of a thermit mixture which consists of 1530 wt% of aluminum powder containing 95% or more of fine particles having a particle diameter of 44 a m or below in view of a particle size distribution, a dust scattering preventing agent and an antioxidant, and 70- 80 wt% of copper oxide containing 95% of more of fme particles having a particle diameter of 74 11 m or below in view of a particle size distribution; and 80- 120 parts by weight of a cracked gas generator.
And, Claim 2 of the invention is characterized in that the aluminum powder is dedust aluminum containing 2 wt% or below of polytetrafluoroethylene as the dust scattering preventing agent and 1-2 wt% of stearic acid or aluminum stearate as the antioxidant.
Claim 3 of the invention is characterized in that the cracked gas generating agent is an inorganic matter having water of crystallization such as potassium alum excluding borax, which generates steam with application of a high temperature.
And, in the invention of Claim 1, the thermit mixture consists of 15- 30 wt% of aluminum powder containing 95% or more of fine particles having a particle diameter of 44 tj m or below in view of a particle size distribution, a dust scattering preventing agent and an antioxidant, and 70- 80 wt% of copper oxide containing 95% of more of fine particles having a particle diameter of 74 11 m or below in view of a particle size distribution, so that it has flammability and brittle body breaking performance equal to or higher than those of a conventional non- explosive breaking agent.And, since the dust scattering preventing agent is added to prepare dedust aluminum, safety in the production and handling can be improved, and the addition of the antioxidant to aluminum can provides an effect of remarkably improving the stability of the product with time.
It has been confirmed that the performance of the non- explosive breaking composition does not change substantially even when the particle diameters of copper oxide, which is the oxidizing agent for the thermit reaction for making aluminum to have a grain size of 44 11 m or below (median of 17- 23 u m), is made larger than the prior art
And, in the invention of Claim 2, aluminum uses 2 wt% or below of polytetrafluoroethylene (PTFE) as the dust scattering preventing agent, so that it has been found that dust can be prevented from scattering even when the aluminum grain size is reduced to a very fine particle diameter of 44 ii m or below, and 1-2 wt% of stearic acid or aluminum stearate is used as the antioxidant to improve the stability of the non- explosive breaking composition with time.
Generally, such fine- grain dedust aluminum is water resistant, and therefore, even when put in water, it is not get wet and dispersed on the water surface. Therefore, its particle size can be mostly determined by a test method which examines an area of 1g of dedust aluminum dispersed on the water surface without employing a particle size distribution analysis which takes a long time.
The fineness of the particle diameter thus examined is indicated by a water covering area (W.C.A.). The larger a value indicated by it, the smaller the particle diameter becomes.
Besides, in the invention of Claim 3, when the cracked gas generating agent is a substance which produces steam with the application of a high temperature, e g., an inorganic compound having water of crystallization within molecules such as potassium alum, nickel sulfate or the like, the water of crystallization is released by the high temperature due to the thermit reaction and instantaneously discharged as steam. It is to be understood that the cracked gas is preferably harmless steam.From this viewpoint, cane sugar and metaldehyde, which have been tested on the assumption that gas relatively harmless to the human body will be generated, have an effect of breaking brittle bodies, but have disadvantages of spreading fire to neighboring flammables and lacking in a sufficient breaking effect as described above.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is an explanatory diagram for showing a heating test method.
BEST MODE FOR CARRYING OUT THE INVENTION
The invention will be described in detail in the following example.
Example 1:
To 100 parts by weight of acetone, 12.5 parts by weight of vinyl chloride powder was added and mixed well to prepare a binder solution having vinyl chloride dissolved therein (hereinafter referred to as the binder solution To 23 parts by weight of aluminum powder (PF0100S produced by Toyo Aluminium KK) having a particle diameter of 44 p m or below which contained 1.7 parts by weight of PTFE (polytetrafluoroethylene) as a dust preventing agent and 1.5 parts by weight of stearic acid as an oxidant, 77 parts by weight of copper oxide (produced by Nisshin Chemco Co., Ltd.) having a particle diameter of 74 p m or below was added and mixed thoroughly.
To the above mixture, 12 parts by weight of the above binder solution and 100 parts by weight of potassium alum (KA1(SO 4 ) 2 12H 2 0) (produced by Taimei Chemicals Co., Ltd.) were added and mixed thoroughly.
The prepared mixture was passed through a JIS standard 8- mesh sieve, and air- dried for 12 hours or more. About 250g of the dried sample was charged in a plastic cylinder having an inner diameter of 27 mm and a length of 400 mm, a dedicated igniter was attached, the sample was ignited in sand, and its combustion velocity was measured and found to be 218 m/sec After storing the sample for one year, its combustion velocity was measured and found to be 215 m/sec And, after storing for two years, the combustion velocity was found to be 215 m/sec, indicating substantially no change in combustion velocity.
The combustion velocity was measured by an optical fiber detonation velocity measuring device (EXPLOMET- FO) produced by Continitro Company.
Example 2:
The blending in Example 1 was followed except that the amount of potassium alum was increased by 20 parts by weight.
Example 3:
The blending in Example 1 was followed except that copper oxide had a particle diameter of 44 m m or below and the amount of potassium alum was decreased by 20 parts by weight.
Example 4:
The blending in Example 1 was followed except that the amount of the thermit mixture (aluminum and copper oxide) was changed and copper oxide had a particle diameter of 44 S m or below.
Example 5:
The blending in Example 1 was followed except that the amount of the thermit mixture (aluminum and copper oxide) was changed and copper oxide had a particle diameter of 44 p m or below.
Example 6:
The blending in Example 4 was followed except that ammonium alum (Taimei Chemicals Co.,
Ltd.) was used instead of potassium alum.
Example 7:
The blending in Example 5 was followed except that nickel sulfate (NiSO 4 7H 2 0) (reagent) was used instead of potassium alum.
Example 8:
The blending in Example 1 was followed except that ammonium alum was used instead of potassium alum.
It was found that Example 1 through 8 conform to the subject matter of the invention and have remarkable performance and treatability, and Example 8 is particularly excelling in performance.
Comparative Example 1:
To 23 parts by weight of aluminum powder having a particle diameter of 44 u m or below without containing a dust preventing agent and an antioxidant, 10 parts by weight of acetone was added, and 77 parts by weight of copper oxide having a particle diameter of 44 p m or below was added and mixed thoroughly.
Then, 12 parts by weight of a binder solution was added to the aluminum powder and copper oxide mixture prepared above and mixed thoroughly. And, 100 parts by weight of potassium alum was further added and mixed thoroughly.
The mixture prepared was passed through a JIS standard 8- mesh sieve, and air- dried for 12 hours. About 250g was sampled from the resultant product, charged in a plastic cylinder having an inner diameter of 27 mm and a length of 400 mm, a dedicated igniter was attached, the sample was ignited in sand, and its combustion velocity was measured and found to be 215 m/sec After storing the sample for one year, its combustion velocity was measured and found to be 208 m/sec And, after storing for two years, the combustion velocity was found to be 166 m/sec, indicating beavy deterioration in performance.
Comparative Example 2:
The blending in Comparative Example 2 was followed except that borax (Na 2 B 4 0 7 10H 2 0) was used instead of potassium alum.
The obtained sample was similarly charged in the plastic cylinder to measure the combustion velocity and found to be 130 m/sec.
After one- year storage, this sample was found to have solidified partly, indicating a poor stability with time.
Comparative Example 3:
To 23 parts by weight of aluminum powder having a particle diameter of 44 p m or below which contained 2 parts by weight of PTFE as a dust preventing agent and 23 parts by weight of stearic acid as an oxidant, 77 parts by weight of copper oxide having a particle diameter of 44 p m or below was added. And, 12 parts by weight of a binder solution and 100 parts by weight of cane sugar were further added and mixed thoroughly. The prepared mixture was passed through a JIS standard 8- mesh sieve, and air- dried for 12 hours.
The combustion velocity was measured in the same way as in Example 1 and found to be 185 m/sec. It was found that this composition tends to have a combustion residue which continues to smolder and a possibility of spreading fire to neighboring flammables, if any.
Comparative Example 4:
The blending in Comparative Example 3 was followed except that metaldehyde (reagent) was used instead of cane sugar.
The sample was similarly charged in the plastic cylinder to measure the combustion velocity and found to have a low value of 110 rn/sec. And, the compound had some unreacted portions.
Then, the sample was spread on asbestos and burnt by another igniter. It was found that white fibrous suspended matters were produced and the reaction gas had an offensive smelL
The results of the above Examples and Comparative Examples will be shown in Table 1.
In Table 1, stearic acid/aluminum stearate" means stearic acid or aluminum stearate.
Stability with time is divided into five ranks and indicated in numerical values.
Production/handling safety is also divided into five ranks and indicated in numerical values.
Friction/drop hammer sensitivity each is divided up to classes 7 and 8. The larger the value, the less the sensitivity is.
The effects of the dust scattering preventing agent and the antioxidant will be described.
When the dust scattering preventing agent is added, dust is practically prevented from scattering in the material weighing process and the mixing process. A risk of electrostatical igniting due to metallic powder can be reduced, probability the dust is inhaled by the person can be decreased, a large scale exhaust system is not required, and a work environment is extensively improved.
On the other hand, when the antioxidant is added, the composition prepared in Example 1 does not show a substantial difference in reaction velocity after a one- year storage as compared with the composition without the antioxidant prepared in Comparative Example 1 as shown in Table 2. But, when stored for 1.5 years or more, the composition of Comparative Example 1 shows the reaction velocity lowered by 30- 50 m/sec, indicating that the addition of the antioxidant is effective.
Among the stability tests specified in the Explosive Control Act, the heating test which is a high- temperature environment test had the results as shown in Table 3, indicating the improvement in stability by about 35%.
The heating test method will be described with reference to Fig. 1.
First, a sample is dehumidified and dried thoroughly in a vacuum dryer (not shown) at normal temperature. Then, exactly 10g of sample 1 is placed in a glass cylindrical weighing bottle 2 with a lid having a bottom diameter of 35 mm and a height of 50 mm, the bottle 2 is placed in the dryer kept at 75 SC for 48 hours, then sample 1 is accurately weighed again to measure a weight loss.
When the weight loss is 1/100 or below, sample 1 is considered to be good.
INDUSTRIAL APPLICABILITY
As described above, according to Claims 1 to 3, aluminum fine particles can be prevented from being oxidized by adding thereto 1-2 wt% of stearic acid/aluminum stearate as the antioxidant, and dust can be prevented from spreading by adding 2 wt% or below of polytetrafluoroethylene when the rme particles are handled.
As a result, even when aluminum has a particle diameter of 44 p m or below, dust does not scatter so heavily, and using this fine aluminum, the reaction velocity is not affected even when copper oxide has a rather large particle diameter.
Table 1
(Compounding ratio: part by weight)
Example Comparative Sample No. Example 1 2 3 4 5 6 7 8 1 2 3 4 P Aluminium powder 23 23 23 15 30 15 30 23 23 23 23 23 a (44 m or below) r W.C.A. (m/kg) 1.50 1.70 1.68 1.78 1.65 1.56 1.79 1.69 1.05 1.63 1.52 1.70 t Stearic acid/aluminum stearate 1.5 1.6 1.3 1.2 1.4 1.8 1.7 1.6 1.8 2.3 1.2 PTFE 1.7 1.6 1.9 1.5 1.6 1.8 1.9 1.8 1.8 2.0 1.8 A Copper oxide 74 or below 77 77 77 ( m) 44 or below 77 85 70 85 70 77 77 77 77 P Potassium alum 108 120 80 100 100 100 a Ammonium alum 100 100 r Nickel sulfate 100 t Borax 100 Cane sugar 100 B Metaldehyde 100 Stability with time 5 5 5 5 5 4 4 5 3 2 5 4 Friction sensivity (JIS method) 7 7 7 7 7 7 7 7 7 7 7 7 Drop hammer sensivity (JIS method) 6 8 8 8 7 6 7 6 5 5 5 7 Production/handling safety 5/4 5/5 5/4 5/5 5/5 5/5 5/4 5/5 3/3 5/5 4/2 4/2 Reaction velocity (m/sec) 218 195 220 165 187 218 147 344 215 180 185 110 In the table, stability with time and production/handling stability are divided into five ranks (1: Bad 2: Slightly bad 3: Fair 4: Slightly good 5: Good). And, PTFE and stearic acid/aluminum stearate are shown in parts by weight to 100 parts by weight of aluminum. And part A means the thermit mixture and parts B means the cracked gas generating agent.
Table 2
Results of variation with time test (Reaction velocity (m/sec))
Just after 6 1 2 1 8 2 4 Stearic acid preparation months months months months Sample size Composition 2 1 8 2 1 0 2 1 5 2 1 8 2 1 5 27 # x 400mm of Example 1 Composition of Comparative 2 1 5 2 1 5 2 0 8 1 8 8 1 6 6 27 # x 400mm Example 1 Table 3
Results of heating test
Pretest Posttest Weight loss Stearic acid weight (g) weight (g) by heat (%) Test method Composition 10.000 9.988 0.12 Heating test method of Example 1 specified in the Composition of Explosive Control Act Comparative 10.000 9.981 0.19 Example 1
Claims (3)
- CLANS 1. A non- explosive breaking composition comprising 100 parts bg weight of a thermit mixture which consists of 15- 30 wt% of aluminum powder containing 95% or more of fine particles having a partide diameter of 44 p m or below in view of a particle size distribution, a dust scattering preventing agent and an antioxidant, and 70- 80 wt% of copper oxide containing 95% of more of fine particles having a partide diameter of 74 m or below in view of a particle size distribution; and 80- 120 parts by weight of a cracked gas generator.
- 2. A non- explosive breaking composition according to Claim 1, wherein the aluminum powder is dedust aluminum containing 2 wt% or below of polytetrafluoroethylene as the dust scattering preventing agent and 1-2 wt% of stearic acid or aluminum stearate as the antioxidant.
- 3. A non- explosive breaking composition according to Claim 1, wherein the cracked gas generating agent is an inorganic matter having water of crystallization such as potassium alum excluding borax, which generates steam with application of a high temperature.4 A non-explosive composition substantially as hereinbefore described with reference to the Examples.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6314945A JP2965193B2 (en) | 1994-12-19 | 1994-12-19 | Non-explosive crushing composition |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9525356D0 GB9525356D0 (en) | 1996-02-14 |
| GB2296270A true GB2296270A (en) | 1996-06-26 |
| GB2296270B GB2296270B (en) | 1998-06-10 |
Family
ID=18059552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9525356A Expired - Fee Related GB2296270B (en) | 1994-12-19 | 1995-12-12 | Non explosive breaking composition |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2965193B2 (en) |
| KR (1) | KR100276128B1 (en) |
| CN (1) | CN1064658C (en) |
| GB (1) | GB2296270B (en) |
| HK (1) | HK1008148A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1308430A2 (en) * | 2001-11-05 | 2003-05-07 | Chang Sun Kim | Expandable metallic mixture |
| JP2009115411A (en) * | 2007-11-08 | 2009-05-28 | Nippon Koki Co Ltd | Non-explosive gas generator |
| WO2012082084A1 (en) * | 2010-12-17 | 2012-06-21 | Rock Breaking Technology Co (Rob Tech) Ltd. | Rock and concrete breaking (demolition - fracturing - splitting) system |
| RU2477791C1 (en) * | 2011-08-10 | 2013-03-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный минерально-сырьевой университет "Горный" | Gas generator for directed rock destruction |
| CN102992929A (en) * | 2012-09-25 | 2013-03-27 | 雍和平 | Dust-settling method for firework powder |
| WO2024054169A1 (en) * | 2022-09-06 | 2024-03-14 | Amity Ham Petrol Ve Dogal Gaz Arama Ve Uretim Anonim Sirketi | A novel chemical composition for electronically activated chemical rock breaking system |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3828851B2 (en) * | 2002-01-17 | 2006-10-04 | 河合石灰工業株式会社 | Composition for crushing |
| JP3813560B2 (en) * | 2002-09-12 | 2006-08-23 | 河合石灰工業株式会社 | Composition for crushing |
| JP4818583B2 (en) * | 2003-11-07 | 2011-11-16 | 日本工機株式会社 | Insensitive high-power non-explosive crushing agent |
| KR100889226B1 (en) | 2007-03-23 | 2009-03-17 | 주식회사 록스 코리아 | The method of bedrock crush medicine with an electric shock |
| JP5805565B2 (en) * | 2012-03-22 | 2015-11-04 | カヤク・ジャパン株式会社 | Non-explosive gas generating composition |
| JP2016069200A (en) * | 2014-09-29 | 2016-05-09 | カヤク・ジャパン株式会社 | Fracturing agent composition |
| CN104628498A (en) * | 2015-02-12 | 2015-05-20 | 西安近代化学研究所 | Energetic polyoxide compound super-thermite and preparation method thereof |
| JP6404147B2 (en) * | 2015-03-09 | 2018-10-10 | カヤク・ジャパン株式会社 | Crushing agent composition |
| JP6534317B2 (en) * | 2015-09-01 | 2019-06-26 | カヤク・ジャパン株式会社 | Crusher composition |
| CN106518585B (en) * | 2016-10-28 | 2018-09-25 | 安徽理工大学 | A kind of temperature and pressure gunpowder and preparation method thereof |
| DE102022131842A1 (en) * | 2022-12-01 | 2024-06-06 | Zf Airbag Germany Gmbh | PROPELLER CHARGE ELEMENT AND METHOD FOR PRODUCING THE PROPELLER CHARGE ELEMENT |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB945934A (en) * | 1961-12-14 | 1964-01-08 | Middleton And Anderson Proprie | Improvements relating to rock breaking |
| GB2097041A (en) * | 1980-10-07 | 1982-10-27 | John Peter Wilhelm | Process for the enlargement of a rock cavity |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02204384A (en) * | 1989-01-30 | 1990-08-14 | Taisei Corp | Breaking chemical |
-
1994
- 1994-12-19 JP JP6314945A patent/JP2965193B2/en not_active Expired - Lifetime
-
1995
- 1995-10-07 KR KR1019950034404A patent/KR100276128B1/en not_active IP Right Cessation
- 1995-12-12 GB GB9525356A patent/GB2296270B/en not_active Expired - Fee Related
- 1995-12-19 CN CN95120417A patent/CN1064658C/en not_active Expired - Lifetime
-
1998
- 1998-07-09 HK HK98109037A patent/HK1008148A1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB945934A (en) * | 1961-12-14 | 1964-01-08 | Middleton And Anderson Proprie | Improvements relating to rock breaking |
| GB2097041A (en) * | 1980-10-07 | 1982-10-27 | John Peter Wilhelm | Process for the enlargement of a rock cavity |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1308430A2 (en) * | 2001-11-05 | 2003-05-07 | Chang Sun Kim | Expandable metallic mixture |
| EP1308430A3 (en) * | 2001-11-05 | 2004-08-25 | Chang Sun Kim | Expandable metallic mixture |
| JP2009115411A (en) * | 2007-11-08 | 2009-05-28 | Nippon Koki Co Ltd | Non-explosive gas generator |
| WO2012082084A1 (en) * | 2010-12-17 | 2012-06-21 | Rock Breaking Technology Co (Rob Tech) Ltd. | Rock and concrete breaking (demolition - fracturing - splitting) system |
| AU2010365407B2 (en) * | 2010-12-17 | 2016-04-14 | Rock Breaking Technology Co (Rob Tech) Ltd. | Rock and concrete breaking (demolition - fracturing - splitting) system |
| EA025283B1 (en) * | 2010-12-17 | 2016-12-30 | Рок Брейкинг Текнолоджи Ко (Роб Тек) Лтд. | Rock and concrete breaking (demolition-fracturing-splitting) system |
| RU2477791C1 (en) * | 2011-08-10 | 2013-03-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный минерально-сырьевой университет "Горный" | Gas generator for directed rock destruction |
| CN102992929A (en) * | 2012-09-25 | 2013-03-27 | 雍和平 | Dust-settling method for firework powder |
| WO2024054169A1 (en) * | 2022-09-06 | 2024-03-14 | Amity Ham Petrol Ve Dogal Gaz Arama Ve Uretim Anonim Sirketi | A novel chemical composition for electronically activated chemical rock breaking system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9525356D0 (en) | 1996-02-14 |
| CN1064658C (en) | 2001-04-18 |
| JPH08169791A (en) | 1996-07-02 |
| KR100276128B1 (en) | 2000-12-15 |
| KR960022409A (en) | 1996-07-18 |
| GB2296270B (en) | 1998-06-10 |
| CN1135473A (en) | 1996-11-13 |
| HK1008148A1 (en) | 1999-04-30 |
| JP2965193B2 (en) | 1999-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20031212 |