EP2480519B1 - Procede de fabrication d'un explosif - Google Patents

Procede de fabrication d'un explosif Download PDF

Info

Publication number
EP2480519B1
EP2480519B1 EP10765500.3A EP10765500A EP2480519B1 EP 2480519 B1 EP2480519 B1 EP 2480519B1 EP 10765500 A EP10765500 A EP 10765500A EP 2480519 B1 EP2480519 B1 EP 2480519B1
Authority
EP
European Patent Office
Prior art keywords
emulsion
oil
ammonium nitrate
process according
ozone
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.)
Not-in-force
Application number
EP10765500.3A
Other languages
German (de)
English (en)
Other versions
EP2480519A1 (fr
Inventor
Laurence Justin Pienaar Wilson
André Pienaar
Charl Vermaak
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.)
AEL Mining Services Ltd
Original Assignee
AEL Mining Services Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AEL Mining Services Ltd filed Critical AEL Mining Services Ltd
Priority to PL10765500T priority Critical patent/PL2480519T3/pl
Publication of EP2480519A1 publication Critical patent/EP2480519A1/fr
Application granted granted Critical
Publication of EP2480519B1 publication Critical patent/EP2480519B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B31/00—Compositions containing an inorganic nitrogen-oxygen salt
    • C06B31/28—Compositions containing an inorganic nitrogen-oxygen salt the salt being ammonium nitrate
    • C06B31/285—Compositions containing an inorganic nitrogen-oxygen salt the salt being ammonium nitrate with fuel oil, e.g. ANFO-compositions
    • 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
    • C06B23/006—Stabilisers (e.g. thermal stabilisers)
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B47/00—Compositions in which the components are separately stored until the moment of burning or explosion, e.g. "Sprengel"-type explosives; Suspensions of solid component in a normally non-explosive liquid phase, including a thickened aqueous phase
    • C06B47/14—Compositions in which the components are separately stored until the moment of burning or explosion, e.g. "Sprengel"-type explosives; Suspensions of solid component in a normally non-explosive liquid phase, including a thickened aqueous phase comprising a solid component and an aqueous phase
    • C06B47/145—Water in oil emulsion type explosives in which a carbonaceous fuel forms the continuous phase

Definitions

  • THIS INVENTION relates, broadly, to ammonium nitrate/fuel oil explosives, also known as ANFO or ANFEX explosives, and hereinafter also referred to as ANFO explosives. More particularly, the invention relates to a process for producing an ANFO explosive, and to an ANFO explosive when produced by the process.
  • Water and oil emulsion components such as those used in the production of ANFO explosives, are known to be unstable in that separation of the oil and water phases after mixing thereof occurs readily. Such separation is particularly problematic when the emulsion is pre-mixed and then transported to an ANFO explosive manufacturing site or operation, since re-mixing of the emulsion is required before it can be used in manufacture of the ANFO explosive.
  • Conventional approaches to overcoming or inhibiting this instability include adding surfactants to the emulsion and continuous stirring of the emulsion. Continuous stirring of the emulsion is, however, a cumbersome exercise.
  • the use of surfactants is a viable alternative, but surfactants are expensive and in bulk operations, such as the manufacturing of large quantities of ANFO explosive, the use of large quantities of surfactants is thus not an economically attractive option.
  • a process for producing an ammonium nitrate/fuel oil explosive including:
  • the introduction of the ozone into the emulsion may include bubbling ozone or an ozone-containing gas through the emulsion. Bubbling the ozone or the ozone-containing gas through the emulsion may be conducted at a sufficiently high rate such as to cause ozonation of the emulsion.
  • the introduction of the ozone into the emulsion causes the viscosity of the emulsion to increase.
  • the introduction of ozone into the emulsion may therefore be conducted for a sufficient treatment period so as to obtain an emulsion of desired viscosity. More particularly, the introduction of ozone into the emulsion may be continued for a treatment period of from about 1 hour to about 24 hours, e.g. for about 3 hours.
  • the emulsion typically attains a black or milky black appearance, and the bubbling of the ozone through the emulsion will therefore typically continue until such an appearance has been attained.
  • the viscosity of the emulsion will increase above that of the oil used in emulsification.
  • the extent to which the viscosity increases is understood also to be dependent on the quantity of water used to form the emulsion.
  • the ozone is obtained by passing compressed air, oxygen, nitrogen, or mixtures thereof through an ozone generator.
  • the product gas from the ozone generator typically contains 3% to 6%, by volume, ozone; this product gas can then be bubbled through the emulsion.
  • the introduction of the ozone, or ozone-containing gas, into the emulsion may be conducted simultaneously with the admixing of the oil and the water.
  • the emulsion may thus be either a water-in-oil emulsion or an oil-in-water emulsion.
  • the oil and the water may be used such that the oil forms 50%-98% by mass of the emulsion, with the balance thus being water.
  • sufficient of the oil and the water is used such that the oil forms 72%-89% by mass of the emulsion, e.g. about 75% by mass thereof.
  • the water will form 25% by mass thereof.
  • the oil may, in particular, be used lubricating oil. Still more particularly, the lubricating oil may be of the type employed, or rather previously employed, for the lubrication of motor vehicle parts.
  • the motor vehicle parts may, in particular, be those of utility vehicles of the kind used in mines or similar machinery, which require lubrication.
  • the use of reclaimed motor lubricating oils in blasting compositions is known from U.S. Patent 4 111 727 .
  • the admixing of the oil and the water may be effected by means of high-shear mixing. This may be achieved by using a high-shear mixer or another emulsification method or means.
  • the admixing of the oil and the water may be effected in the presence of an emulsifier/surfactant, hereinafter referred to as a surfactant.
  • a surfactant When used, the surfactant may typically form 0.2%-1.0% by mass of the emulsion.
  • the surfactant when used, forms 0.3%-0.8%, e.g. about 0.5% of the emulsion.
  • surfactant used may be provided by the oil.
  • used lubricating oil normally contains some surfactants, and these surfactants can thus constitute at least part of the surfactant as discussed above. It is envisaged that, normally, it will typically not be necessary to use any additional or external surfactant.
  • the relative proportions of emulsion and ammonium nitrate employed in producing the ammonium nitrate/fuel oil (ANFO) explosive will be more or less conventional. More particularly, sufficient of the emulsion and the ammonium nitrate may be used in producing the ANFO explosive such that the oil forms 2.5%-22% by mass of the ANFO explosive. More preferably, sufficient of the emulsion and the ammonium nitrate may be used such that the oil forms 5%-7% by mass of the ANFO explosive, e.g. about 6% by mass thereof.
  • the particulate ammonium nitrate may be in the form of porous ammonium nitrate prills, i.e. porous prilled ammonium nitrate.
  • the porous prilled ammonium nitrate PPAN
  • the PPAN prills may be employed in a mass ratio to the fuel of 98:2 - 78:22.
  • the PPAN is employed in a mass ratio to the fuel of 94:6 - 91:9, e.g. about 94:6.
  • Admixing the ozonated emulsion with the porous prilled ammonium nitrate may be conducted in conventional fashion by pumping the emulsion from a source tank and spraying it by means of a nozzle onto the ammonium nitrate which is moved along by the flutes of an auger. It is expected that moving the ammonium nitrate in such a fashion will provide additional mixing.
  • a concrete mixer or the like may be used.
  • the invention extends to an ANFO explosive when produced in accordance with the process described herein.
  • a water-in-oil emulsion comprising, by mass, 25% water and 75% oil, was prepared by mixing appropriate quantities of water and used lubricating oil in a high-shear mixing vessel.
  • Ozonated air i.e. a gas obtained by passing compressed air through an ozone generator and containing 3% to 6% ozone, by volume, was bubbled through the mixture for a treatment period of 3 hours, during which the viscosity of the emulsion increased above that of the oil used and the emulsion attained a black appearance.
  • any other suitable gas may be used instead of compressed air to generate an ozone-containing gas which is then bubbled through the mixture or emulsion of water and used lubricating oil.
  • An ANFO explosive was then prepared by admixing the stabilized emulsion or fuel with porous prilled ammonium nitrate (PPAN) in a mass ratio of PPAN: stabilized emulsion (fuel) of 94:6.
  • the admixing was effected by pumping the emulsion from a source tank and spraying it by means of a nozzle on to the ammonium nitrate prills.
  • the Applicant believes that the present invention provides a viable and cost-effective process for the production of ANFO explosive which addresses, in particular, the difficulties associated with the separation of water and oil components of a water/oil emulsion.
  • ozone in the formation of the oil/water emulsion, in accordance with the invention, serves to stabilize the emulsion so that separation of the emulsion into separate oil and water phases does not readily occur.
  • surfactants already present in the used lubricating oil serve to stabilize the emulsion even further, typically to the extent that it is not necessary to use any additional, i.e. external or additional, surfactant.
  • the stabilized ozonated emulsion provided by this process is thus economically attractive, as the need for large quantities of expensive additional surfactants to stabilize the emulsion is reduced or even eliminated.
  • the stabilized emulsion was found to be stable for long periods of time, being particularly advantageous when the emulsion needs to be transported in premixed form to an ANFO explosive production site or operation.

Claims (13)

  1. Processus de production d'un explosif à base de nitrate d'ammonium/mazout, le processus comportant le fait :
    de mélanger une huile avec de l'eau pour former un combustible comprenant une émulsion ;
    d'introduire de l'ozone dans l'émulsion, pour obtenir ainsi une émulsion ozonée ; et
    de mélanger l'émulsion ozonée avec du nitrate d'ammonium en particules solides pour absorber l'émulsion dans le nitrate d'ammonium, pour former ainsi un explosif à base de nitrate d'ammonium/mazout.
  2. Processus selon la revendication 1, dans lequel l'introduction de l'ozone dans l'émulsion comporte le fait de barboter l'ozone ou un gaz contenant de l'ozone à travers l'émulsion.
  3. Processus selon la revendication 1 ou 2, dans lequel l'introduction de l'ozone dans l'émulsion est effectuée pendant une durée de traitement de 1 heure à 24 heures.
  4. Processus selon l'une quelconque des revendications précédentes, dans lequel l'introduction de l'ozone dans l'émulsion se produit simultanément avec le mélange de l'huile et de l'eau.
  5. Processus selon l'une quelconque des revendications précédentes, dans lequel une quantité d'huile suffisante est utilisée de manière à constituer de 50% à 98% en masse de l'émulsion.
  6. Processus selon l'une quelconque des revendications précédentes, dans lequel l'huile est une huile de lubrification usagée.
  7. Processus selon la revendication 6, dans lequel le mélange de l'huile et de l'eau est effectué en présence d'un tensio-actif, le tensio-actif formant de 0,2% à 1,0% en masse de l'émulsion.
  8. Processus selon la revendication 7, dans lequel au moins une partie du tensio-actif est fournie par l'huile.
  9. Processus selon l'une quelconque des revendications précédentes, dans lequel les proportions relatives de l'émulsion et du nitrate d'ammonium utilisées sont telles que l'huile forme de 2,5% à 22% en masse de l'explosif.
  10. Processus selon l'une quelconque des revendications précédentes, dans lequel le nitrate d'ammonium en particules est sous la forme de nitrate d'ammonium granulé poreux.
  11. Processus selon la revendication 10, dans lequel le nitrate d'ammonium granulé poreux est utilisé en un rapport, par rapport au combustible, de 98:2 à 78:22 en masse.
  12. Processus selon la revendication 10 ou 11, dans lequel le mélange de l'émulsion ozonée avec le nitrate d'ammonium granulé poreux est effectué par pulvérisation de l'émulsion sur le nitrate d'ammonium tout en déplaçant le nitrate d'ammonium par l'intermédiaire des cannelures d'une vis sans fin.
  13. Processus selon la revendication 10 ou 11, dans lequel le mélange de l'émulsion stabilisée avec le nitrate d'ammonium granulé poreux est effectué dans une bétonnière.
EP10765500.3A 2009-09-23 2010-09-16 Procede de fabrication d'un explosif Not-in-force EP2480519B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10765500T PL2480519T3 (pl) 2009-09-23 2010-09-16 Sposób wytwarzania materiału wybuchowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200906668 2009-09-23
PCT/IB2010/054181 WO2011036611A1 (fr) 2009-09-23 2010-09-16 Explosif

Publications (2)

Publication Number Publication Date
EP2480519A1 EP2480519A1 (fr) 2012-08-01
EP2480519B1 true EP2480519B1 (fr) 2013-10-23

Family

ID=43088111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10765500.3A Not-in-force EP2480519B1 (fr) 2009-09-23 2010-09-16 Procede de fabrication d'un explosif

Country Status (15)

Country Link
EP (1) EP2480519B1 (fr)
AP (1) AP3055A (fr)
AR (1) AR081511A1 (fr)
AU (1) AU2010299537B2 (fr)
CA (1) CA2774606A1 (fr)
CL (1) CL2012000712A1 (fr)
DK (1) DK2480519T3 (fr)
ES (1) ES2436189T3 (fr)
HR (1) HRP20131099T1 (fr)
MA (1) MA33684B1 (fr)
PE (1) PE20110378A1 (fr)
PL (1) PL2480519T3 (fr)
PT (1) PT2480519E (fr)
WO (1) WO2011036611A1 (fr)
ZA (1) ZA201006760B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2900573C (fr) 2013-02-05 2020-10-27 Dyno Nobel, Inc. Compositions, procedes et systemes pour des spherules de nitrate
FR3021313B1 (fr) * 2014-05-20 2016-06-17 Nitrates & Innovation Produit explosif en cartouche obtenu a partir de melange d'emulsion et de billes de polystyrene

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111727A (en) * 1977-09-19 1978-09-05 Clay Robert B Water-in-oil blasting composition
US4404050A (en) * 1982-09-29 1983-09-13 C-I-L Inc. Water-in-oil emulsion blasting agents containing unrefined or partly refined petroleum product as fuel component
CA2064609C (fr) * 1992-04-01 1996-10-29 Sydney Oliver Smith Composition d'explosif
DE19649763A1 (de) * 1996-11-30 1998-06-04 Appenzeller Albert Sprengstoff für zivile, insbesondere bergmännische Zwecke
JP2000219886A (ja) * 1999-02-01 2000-08-08 Masatoshi Matsumura 植物油（バージン油）又は植物性廃油のディーゼルエンジン用燃料化精製方法及び装置
US20070039238A1 (en) * 2003-10-02 2007-02-22 Masatoshi Matsumura Biodiesel fuel modifying agent, fuel and method related thereto
ITBO20070554A1 (it) * 2007-08-02 2009-02-03 Franco Papa Processo per la produzione di gel ozonizzato di olio di oliva e gel ottenuto.

Also Published As

Publication number Publication date
PE20110378A1 (es) 2011-07-14
AU2010299537B2 (en) 2014-01-23
EP2480519A1 (fr) 2012-08-01
ES2436189T3 (es) 2013-12-27
CL2012000712A1 (es) 2012-08-31
HRP20131099T1 (hr) 2013-12-20
WO2011036611A1 (fr) 2011-03-31
DK2480519T3 (da) 2014-02-03
ZA201006760B (en) 2011-06-29
PL2480519T3 (pl) 2014-03-31
AU2010299537A1 (en) 2012-04-19
PT2480519E (pt) 2013-11-25
MA33684B1 (fr) 2012-10-01
AP3055A (en) 2014-12-31
AR081511A1 (es) 2012-10-03
AP2012006175A0 (en) 2012-04-30
CA2774606A1 (fr) 2011-03-31

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