EP2079979B1 - A detonation tube with improved separability from the processed broken stone - Google Patents

A detonation tube with improved separability from the processed broken stone Download PDF

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Publication number
EP2079979B1
EP2079979B1 EP07817391A EP07817391A EP2079979B1 EP 2079979 B1 EP2079979 B1 EP 2079979B1 EP 07817391 A EP07817391 A EP 07817391A EP 07817391 A EP07817391 A EP 07817391A EP 2079979 B1 EP2079979 B1 EP 2079979B1
Authority
EP
European Patent Office
Prior art keywords
basis
magnetic
material component
main material
iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07817391A
Other languages
German (de)
French (fr)
Other versions
EP2079979A1 (en
Inventor
Pavel Valenta
Jaromir Fiala
Zlatko Srank
Libor Mastny
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Austin Detonator sro
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Austin Detonator sro
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Application filed by Austin Detonator sro filed Critical Austin Detonator sro
Publication of EP2079979A1 publication Critical patent/EP2079979A1/en
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Publication of EP2079979B1 publication Critical patent/EP2079979B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/11—Initiators therefor characterised by the material used, e.g. for initiator case or electric leads
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C5/00—Fuses, e.g. fuse cords
    • C06C5/04—Detonating fuses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition

Definitions

  • the invention deals with double-layer, three-layer or multi-layer detonation tubes, also referred to as the Shock Tube type, used for industrial non-electric detonators, as described for instance in document US 5243913 A .
  • Shock Tube type used for industrial non-electric detonators, as described for instance in document US 5243913 A .
  • it deals with the design of their body to enable economically acceptable separation of remainders of such detonation tubes of non-electric detonators after the execution of blasting work from the other substances from the processed mined material.
  • a detonation tube designed as double or multi-layer detonation tube of an industrial non-electric detonator containing the active component of the detonator stored in an at least double-layered tubular body or package in accordance with the presented invention wherein at least one layer of the body or package of this detonation tubes is made of a magnetic material where this magnetic material is produced as a mixture of the magnetic and a non-magnetic main material component characterized in that the content of the magnetic main material component in individual layers of the body or package of the detonation tube is 10 to 30% of weight, related to the weight of the individual layers of the body or package of the detonation tube.
  • the magnetic main material component may be beneficially produced on the basis of magnetite - Fe 3 O 4 , or on the basis of ferrite with the general formula Me II Fe 2 O 4 , where Me represents Co, Mn, Ni, Ca, Cu, Zn, Mg, or ferrite with the general formula Ln II Fe 2 O 4 , where Ln represents noble earth elements, or on the basis of noble earth elements in the oxidation degree II, or on the basis of ferric oxide in the modification ⁇ -Fe 2 O 3 , or on the basis of powder iron, or on the basis of a magnetic alloy of iron or on the basis of a mixture or alloy containing the above mentioned magnetic partial components, where advantageous magnetic alloys of iron are alloys containing at least noble earth elements, or especially advantageous magnetic alloys of iron are alloys containing at least one noble earth element and B and/or Co while advantageous metallic noble earth elements are Nd and Sm.
  • the magnetic main material component is made on the basis of magnetically hard materials of the AlNiCo or FeCoCr type.
  • the non-magnetic main material component is beneficially created on the basis of a plastic material from the group of polymers or copolymers while it is especially advantageous if the polymer or copolymer is represented by substances from the PE, PP, PTFE plastic material group or ethylene copolymer with derivatives of methacrylic acid.
  • detonation tubes are created where the magnetic substances contained in its body or package, at least in one layer enable magnetic separation of remainders of this tube from the mined material, which eliminates the hitherto considerable disadvantage of the necessity of manual separation of these remainders or in comparison with not performed separation reduces the risk of clogging or damaging processing equipment of broken stone contaminated by remainders of detonation tubes.
  • detonation tubes made in accordance with the presented invention comply with requirements for cutting and rubbing resistance and the requirement for electric non-conductivity and also maintain their further benefits as high work safety and variability of creation of timed detonation networks as well as high resistance to water and humidity.
  • a double-layer detonation tube was prepared.
  • the first layer was based on ethylene copolymer with methacrylic acid and the second layer was based on PE containing 80 weight parts of PE and 20 weight parts of magnetite - FeFe 2 O 4 .
  • the detonation tube prepared this way complied with the required rubbing and cutting resistance as well as the requirement of non-conductivity in accordance with relevant technical standards.
  • a three-layer detonation tube was prepared.
  • the first layer was based on the same composition as in example 1, the second layer was based on PE containing 85 weight parts of magnetite - FeFe 2 O 4 and the third layer was based on PE containing 75 weight parts of PE and 25 weight parts of magnetite - FeFe 2 O 4 .
  • This detonation tube also complied with the required rubbing and cutting resistance as well as the requirement of non-conductivity in accordance with relevant technical standards.
  • detonation tubes prepared in accordance with examples 1 and 2 were used for sets of electric detonators. After the execution of blasting work with the use of these sets the removal efficiency of remainders of detonation tubes from the mined rock with a magnetic field was tested. In both the cases 100% efficiency of removal of remainders of detonation tubes was proved.
  • the equipment based on the presented invention can be used for blasting work where the resulting broken material is subsequently processed and the remainders of detonation tubes must be separated from the broken material.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Soft Magnetic Materials (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention deals with a detonation tube with improved separability from the processed broken stone designed as a double-layer or multi-layer detonation tube of an industrial non-electric detonator containing the active component of the detonator stored in an at least double-layered tubular body or package where the principle is that at least one layer of its body or package is made of magnetic material while the magnetic material is preferentially created as a mixture of the magnetic and non-magnetic main material component while the content of the magnetic main material component in individual layers of the body or package of the detonation tube is advantageously 2 to 60% of weight and the rest to 100% consists of the non-magnetic main material component, all related to the weight of individual layers, and the magnetic main material component is beneficially produced on the basis of magnetite -Fe3O4, or on the basis of ferrite with the general formula MeIIFe2O4, where Me represents Co, Mn, Ni, Ca, Cu, Zn, Mg, or ferrite with the general formula LnIIFe2O4, where Ln represents noble earth elements, or on the basis of noble earth elements in the oxidation degree II, or on the basis of ferric oxide in the modification gamma-Fe2O3, or on the basis of powder iron, or on the basis of a magnetic alloy of iron or on the basis of a mixture or alloy containing the above mentioned magnetic partial components, where advantageous magnetic alloys of iron are alloys containing at least noble earth elements, or especially advantageous magnetic alloys of iron are alloys containing at least one noble earth element and B and/or Co or where alternatively the magnetic main material component is made on the basis of magnetically hard materials of the AlNiCo or FeCoCr type. The non-magnetic main material component is beneficially created on the basis of a plastic material, preferentially from the group of polymers or copolymers, mainly on the basis of substances from the PE, PP, PTFE plastic material group or ethylene copolymers with derivatives of methacrylic acid.

Description

    Field of the Invention
  • The invention deals with double-layer, three-layer or multi-layer detonation tubes, also referred to as the Shock Tube type, used for industrial non-electric detonators, as described for instance in document US 5243913 A . In particular it deals with the design of their body to enable economically acceptable separation of remainders of such detonation tubes of non-electric detonators after the execution of blasting work from the other substances from the processed mined material.
    • Background of the Invention
  • Remainders of detonation tubes of non-electric detonators used during blasting work within mining of rock contaminate the resulting mined product, i.e. broken stone. In this case contamination is represented by the presence of remainders of tubes in the mined material, which subsequently causes problems during the treatment of the material in technological equipment as e.g. crushers where the broken stone or mining product is ground or sorters where the product is sorted into the required fraction. The above mentioned contamination and entering of insulation remainders to the above mentioned processing machines result in frequent shutdowns of the machines caused by the necessity to remove the remainders of detonation tubes from them. In extreme cases the machines may even break down. This is why it is necessary to remove the concerned remainders of tubes from the mined product, especially stone, which is carried out manually at present. This fact increases the costs of the series of blasting work and treatment of mined stone, which is a considerable disadvantage in technological procedures comprising the use of otherwise very safe non-electric detonators equipped with a low-energy detonation tube. At present, this disadvantage limits using non-electric detonators with a detonation tube. But on the other hand some utility and technical parameters of these non-electric detonators have not been exceeded yet. Significant advantages of these entire detonators are mainly the point of view of work safety and variability of creating timed detonating networks as well as high resistance to water and humidity. However, in the present detonators of this type these advantages are overshadowed by contamination of broken stone by remainders of detonation tubes.
    • Summary of the Invention
  • The above mentioned disadvantages are reduced to the decisive extent and a detonation tube with the possibility of easy machine separation from broken stone is achieved with the use of a detonation tube designed as double or multi-layer detonation tube of an industrial non-electric detonator containing the active component of the detonator stored in an at least double-layered tubular body or package in accordance with the presented invention wherein at least one layer of the body or package of this detonation tubes is made of a magnetic material where this magnetic material is produced as a mixture of the magnetic and a non-magnetic main material component characterized in that the content of the magnetic main material component in individual layers of the body or package of the detonation tube is 10 to 30% of weight, related to the weight of the individual layers of the body or package of the detonation tube. The magnetic main material component may be beneficially produced on the basis of magnetite - Fe3O4, or on the basis of ferrite with the general formula MeIIFe2O4, where Me represents Co, Mn, Ni, Ca, Cu, Zn, Mg, or ferrite with the general formula LnIIFe2O4, where Ln represents noble earth elements, or on the basis of noble earth elements in the oxidation degree II, or on the basis of ferric oxide in the modification γ-Fe2O3, or on the basis of powder iron, or on the basis of a magnetic alloy of iron or on the basis of a mixture or alloy containing the above mentioned magnetic partial components, where advantageous magnetic alloys of iron are alloys containing at least noble earth elements, or especially advantageous magnetic alloys of iron are alloys containing at least one noble earth element and B and/or Co while advantageous metallic noble earth elements are Nd and Sm. Or alternatively the magnetic main material component is made on the basis of magnetically hard materials of the AlNiCo or FeCoCr type. The non-magnetic main material component is beneficially created on the basis of a plastic material from the group of polymers or copolymers while it is especially advantageous if the polymer or copolymer is represented by substances from the PE, PP, PTFE plastic material group or ethylene copolymer with derivatives of methacrylic acid.
  • This way a detonation tube is created where the magnetic substances contained in its body or package, at least in one layer enable magnetic separation of remainders of this tube from the mined material, which eliminates the hitherto considerable disadvantage of the necessity of manual separation of these remainders or in comparison with not performed separation reduces the risk of clogging or damaging processing equipment of broken stone contaminated by remainders of detonation tubes. At the same time detonation tubes made in accordance with the presented invention comply with requirements for cutting and rubbing resistance and the requirement for electric non-conductivity and also maintain their further benefits as high work safety and variability of creation of timed detonation networks as well as high resistance to water and humidity.
    • Description of the Preferred Embodiments Example 1
  • A double-layer detonation tube was prepared. The first layer was based on ethylene copolymer with methacrylic acid and the second layer was based on PE containing 80 weight parts of PE and 20 weight parts of magnetite - FeFe2O4. The detonation tube prepared this way complied with the required rubbing and cutting resistance as well as the requirement of non-conductivity in accordance with relevant technical standards.
    • Example 2
  • A three-layer detonation tube was prepared. The first layer was based on the same composition as in example 1, the second layer was based on PE containing 85 weight parts of magnetite - FeFe2O4 and the third layer was based on PE containing 75 weight parts of PE and 25 weight parts of magnetite - FeFe2O4. This detonation tube also complied with the required rubbing and cutting resistance as well as the requirement of non-conductivity in accordance with relevant technical standards.
    • Example 3
  • The detonation tubes prepared in accordance with examples 1 and 2 were used for sets of electric detonators. After the execution of blasting work with the use of these sets the removal efficiency of remainders of detonation tubes from the mined rock with a magnetic field was tested. In both the cases 100% efficiency of removal of remainders of detonation tubes was proved.
    • Industrial applicability
  • The equipment based on the presented invention can be used for blasting work where the resulting broken material is subsequently processed and the remainders of detonation tubes must be separated from the broken material.

Claims (5)

  1. A shock tube designed as a double layer or multi-layer shock tube of an industrial non-electric detonator containing the active component of the detonator at least one layer of its body or package is wherein made as a mixture of a magnetic main material component and a non-magnetic material component, characterized in that the content of magnetic main material component in individual layers of the body or package is 10 to 30% of weight, related to the weight of the individual layers.
  2. A shock tube according to claim 1 characterized in that the magnetic main material component is produced on the basis of magnetite-Fe2O4, or on the basis of of ferrite with the general formula Me"Fe2O4, where Me presents Co, Mn, Ni, Ca, Cu, Zn, Mg, or ferrite with general formula Ln"Fe2O4, where Ln represents noble-earth elements, or on the basis of noble earth elements in the oxydation degrese II, or on the basis of ferric oxide in the modification γ-Fe2O3, or on the basis on magnetic alloy of iron, or on the basis of a mixture or alloy, containing the above mentioned magnetic partial components.
  3. A shock tube according to claims 1 and 2 characterized in that the magnetic alloys of iron are alloys containing Nd and Sm and B and/or Co.
  4. A shock tube according to claim 1 characterized in that the magnetic main material component is produced on the basis of magnetically hard material of the AlNiCo or FeCoCr type.
  5. A shock tube according to claims 1 to 4 characterized in that the non-magnetic material component is made on the basis of plastic, which is selected from PE, PP, TFE plastic group or ethylene copolymer with derivatives of methacrylic acid.
EP07817391A 2006-10-27 2007-10-26 A detonation tube with improved separability from the processed broken stone Active EP2079979B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2006-682A CZ306750B6 (en) 2006-10-27 2006-10-27 A detonation tube of an industrial non-electric blasting cap for improvement of separability from the processed broken rock
PCT/CZ2007/000095 WO2008049379A1 (en) 2006-10-27 2007-10-26 A detonation tube with improved separability from the processed broken stone

Publications (2)

Publication Number Publication Date
EP2079979A1 EP2079979A1 (en) 2009-07-22
EP2079979B1 true EP2079979B1 (en) 2011-08-03

Family

ID=39047539

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Application Number Title Priority Date Filing Date
EP07817391A Active EP2079979B1 (en) 2006-10-27 2007-10-26 A detonation tube with improved separability from the processed broken stone

Country Status (7)

Country Link
US (1) US20100000437A1 (en)
EP (1) EP2079979B1 (en)
AT (1) ATE519089T1 (en)
CZ (1) CZ306750B6 (en)
RU (1) RU2447394C2 (en)
UA (1) UA94773C2 (en)
WO (1) WO2008049379A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871751B (en) * 2010-06-04 2012-12-26 武汉人天包装技术有限公司 Explosion-conducting tube code spraying and visual automatic detection device in civil explosive industry
CN110964151A (en) * 2019-12-25 2020-04-07 浙江鑫牛管业有限公司 Preparation method of magnetic powder modified PPR material and method for processing pipe by using same

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Also Published As

Publication number Publication date
WO2008049379A1 (en) 2008-05-02
RU2447394C2 (en) 2012-04-10
RU2009119407A (en) 2010-12-10
US20100000437A1 (en) 2010-01-07
CZ306750B6 (en) 2017-06-14
ATE519089T1 (en) 2011-08-15
UA94773C2 (en) 2011-06-10
CZ2006682A3 (en) 2008-05-07
EP2079979A1 (en) 2009-07-22

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