EP1458660A1 - A method for preparing a sensitised emulsion explosive - Google Patents
A method for preparing a sensitised emulsion explosiveInfo
- Publication number
- EP1458660A1 EP1458660A1 EP02783866A EP02783866A EP1458660A1 EP 1458660 A1 EP1458660 A1 EP 1458660A1 EP 02783866 A EP02783866 A EP 02783866A EP 02783866 A EP02783866 A EP 02783866A EP 1458660 A1 EP1458660 A1 EP 1458660A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gassing
- emulsion
- urea
- solution
- water
- 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.)
- Granted
Links
Classifications
-
- 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
-
- 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
-
- 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
- C06B23/002—Sensitisers or density reducing agents, foam stabilisers, crystal habit modifiers
- C06B23/004—Chemical sensitisers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/10—Feeding explosives in granular or slurry form; Feeding explosives by pneumatic or hydraulic pressure
Definitions
- a method for preparing a sensitised emulsion explosive is provided.
- the present invention relates to a method for preparing a sensitised water- in-oil emulsion explosive. (Hereafter referred to as "emulsion explosive”). More particularly, the invention relates to a method of reducing the formation of toxic nitrogen oxides (NOx) in the finished emulsion explosive product that is sensitised quickly, or gassed with nitrite at low pH values.
- emulsion explosive a method for reducing the formation of toxic nitrogen oxides (NOx) in the finished emulsion explosive product that is sensitised quickly, or gassed with nitrite at low pH values.
- Emulsion explosives are well known in the art. They are fluid when formed (and can be designed to remain fluid at temperatures of use) and are used in both packaged and bulk forms. They can be used as straight emulsions or be mixed with ammonium nitrate prills and/or ANFO to form a heavy ANFO product, having higher energy and, depending on the ratios of components, better water resistance than ANFO. Such emulsions can be reduced in density by the addition of voids in the form of hollow microspheres, other solid air entraining agents or gas bubbles, which materially sensitise the emulsion to detonation. A uniform, stable dispersion of air entraining agent or gas bubbles is important to detonation properties of the emulsion. Gas bubbles, if present, normally are produced by the reaction of chemical gassing agents.
- blast-holes When blast-holes are loaded with a chemically gassed or sensitised emulsion explosive, it is important to have the correct part of the blast-hole unloaded to prevent fly-rocks and possible damage to man and properties. If the gassing process is slow, it is difficult to know when to stop the loading process and how much the emulsion will expand upwards in the blast-hole, in order to have the correct unloading part of the blast hole.
- a common sensitising agent is nitrite, which generates nitrogen bubbles in the emulsion when nitrite reacts with ammonium, preferably in the presence of an accelerator.
- Gassed emulsion explosives can under certain conditions fall or slide out of a blasthole and thereby loose some of the sensitising gas.
- some sensitised emulsion may collapse and loose gas, especially when stemming is applied to a blast-hole with a low-density emulsion explosive.
- people Under poor ventilation conditions, people can be exposed to dangerous N0 2 levels, when working close to a sensitised emulsion explosive loosing its sensitising gas, both in the field and at laboratory work.
- N0 2 is very toxic gas and has a threshold limit in Europe as low as 2 ppm.
- the present invention provides a new method for quickly sensitising an emulsion explosive where the toxic NOx-gas will be reduced or eliminated during the gassing process.
- the present invention provides a method for preparing a sensitised emulsion explosive in a blast hole or a package, wherein a) a fuel phase and b) an oxidizer solution containing ammonium species and oxidizer salt, and having a pH in the range 0-3, are emulsified to form an emulsion, which is subjected to gassing by mixing it with c) a gassing solution containing inorganic nitrite, in the presence of urea as gassing accelerator, and wherein the emulsion explosive is delivered to a blast hole or a package by means of a loading tube or hose, allowing the gassing to take place at the end of said tube or hose.
- the pH should be adjusted to a value in the range of 0-3, preferably by means of an organic acid having at least 3 carbon atoms, such as citric and/or tartaric acid.
- a preferred pH is in the range of 0,4-2,0 in particular about 1.
- the oxidizer solution of the emulsion normally should contain the organic acid such as citric acid in a concentration of from 0,2 to 5 % preferably from 1 ,5 to 3%.
- urea When urea is used as a gassing accelerator there is practically no generation of nitrous gasses (NO x ), or any other toxic gases that might be produced using other gassing accelerators.
- NO x nitrous gasses
- Urea has been used or suggested for use in water-bearing blasting agents of the emulsion or water-gel type and in ANFO blasting agents.
- U.S. Pat. No. 5,159,153 discloses the use of urea in the oxidizer salt solution phase of an emulsion blasting-agent for purposes of stabilizing the blasting agent against thermal degradation in the presence of reactive sulfide and pyrite ores.
- U.S. Pat. No. 4,338,146 discloses the use of urea as an additive in a cap-sensitive emulsion explosive in an amount of less than 5% by weight.
- 4,500,369 discloses the use of urea in an emulsion blasting-agent to lower its crystallization temperature.
- U.S. Pat. No. 3,708,356 discloses the use of urea to stabilize ANFO against reaction with pyrite ores.
- U.S. Pat. No. 5,608,185 discloses a method of reducing the formation of toxic nitrogen oxides (NO.sub.x) in after-blast fumes by using an emulsion blasting agent that has an appreciable amount of urea in its discontinuous oxidizer salt solution phase.
- the urea in said patent is used for reducing the amount of nitrogen oxides formed in after-blast fumes, while according to the present invention the urea is used together with the gassing agent in connection with the sensitising of the emulsion explosive, to avoid the formation of NOx in the sensitised emulsion before it is detonated.
- USP 5,972,137 relates to the gassing of an emulsion explosive, but the purpose is not to reduce the amount of NOx in the sensitised emulsion, but to use an organic solvent for the gassing agent in order to minimize the total amount of water in the explosive composition, and thereby increasing the energy of the explosive.
- a relative high pH is used, and the gassing agent is a combined hose lubricant and gassing agent.
- the gassing accelerator is added to the fuel phase and will extract over to the oxidizer solution as the emulsion is formed. Rapid gassing using a low oxidizer pH is not possible with this patent as urea (gassing accelerator) will decompose under these conditions.
- the sensitised emulsion explosive prepared according to the present invention is delivered to a blast hole or a package (cartridge) by means of a loading tube or hose, which may suitably be lubricated by lubricating water to reduce the friction of the emulsion explosive through the tube or house.
- a loading tube or hose which may suitably be lubricated by lubricating water to reduce the friction of the emulsion explosive through the tube or house.
- urea may be added to said lubricating water. It is also possible to add further desired substances to the lubricating water, and examples of such other substances are organic acids to reduce the pH value to the necessary level and also energy and flame reducing agents.
- the concentration of urea should preferably be from 10 to 45%, in particular from 20 to 30% by weight. In the lubricating water the concentration of urea should preferably be from 5 to 50%, preferably from 20 to 40% by weight.
- urea is added in small quantities in the gas forming composition. In the referred USP 6,165,297 it is necessary to mix two different gassing ingredients just prior to the gassing process, as the gassing ingredients in said patent otherwise will self gas.
- USP 6,165297 (see col.12; line 8-31 ) describes the gassing process in Example 3 as follows: "An aqueous solution sodium nitrite (SNI) and urea was stored in one container of the apparatus of the current invention, while an aqueous solution of the ammonium nitrate (AN) and urea was stored in a separate container. The SNI solution and AN/urea solution were pumped from their containers through separate conduits into a small tank and were mixed together using a rapidly turning propeller.
- SNI sodium nitrite
- AN ammonium nitrate
- the premix so formed was then injected into the water-in oil emulsion just prior to the water-in-oil emulsion passing through a series of static mixing elements, which evenly distributed the components suitable for gas formation throughout the water-in-oil emulsion.
- the water-in-oil emulsion incorporating the components passed through the remaining length of stainless steel conduit into a flexible loading hose, the other end of which was loaded in a blasthole.
- the goal with the present invention is rapid gassing, and at the same time to eliminate or minimize the NOx formed in the gassing process. This is achieved by using an organic acid in the oxidizer solution, where citric acid and/or tartaric acid are the preferred organic acid.
- USP 6,165,297 mixes two gassing ingredients just prior to injection to the emulsion. This premix is self-gassing, and the water-in-oil emulsion itself has a relatively high pH of 4,2 (See col.10, line 45), and the ammonium species in the oxidizer solution do not (or very slowly) react directly with the nitrite in the gassing solution.
- a urea solution is used as a loading hose lubricant, and is mixed with the emulsion in a spray nozzle at the end of the loading hose.
- the pH of the water-on-oil emulsion is very low (less than 3).
- the gassing component can alternatively be added as a string in the centre of the emulsion (See PCT/NO98/00275) or be blended with a static mixer or in a mechanical mixer just before the emulsion enters the loading hose.
- P 5,608,185 uses urea as a component in the discontinuous oxidizer salt phase educe the formation of nitrogen oxide in the after-blast fumes.
- This patent is o very different from the present invention for the following reasons:
- the present invention uses urea to eliminate pre-detonation nitrogen oxides that can generate during rapid gassing.
- USP 5,608,185 uses from 5 to 30% urea.
- the urea is dissolved in oxidizer salt solution.
- the present invention uses urea as an additive to the water lubrication solution, which is necessary to use, in order to pump the emulsion through a long and thin loading hose.
- the emulsion and the lubrication solution are mixed in a mixing nozzle.
- the goal is to sensitise the emulsion rapidly, and therefore gas rapidly.
- the emulsion should have a low pH in the oxidizer solution, and in this case is it impossible to have urea as a component in the oxidizer solution, as urea will decompose slowly in acid solution.
- USP 5,159,153 urea is added with the purpose of stabilizing the emulsion against thermal degradation with reactive sulfide/pyrite ores. So the purpose with this patent is completely different than in USP 5,08,185 and the current patent application where the purpose is to reduce after blast fumes and to eliminate NOx during the gassing-process (or sensitivitation) of the emulsion respectively.
- USP 5,159,153 urea is added from 5-20% preferably dissolved in the oxidizer phase, but may also be added as a powdered or solid phase.
- urea is dissolved in the water-lubrication solution, and mixed with the emulsion at the end of the conduit, where urea acts as a gassing accelerator and minimizes or reduces the NOx normally formed during a rapid gassing process, or alternatively urea is used in the gassing solution or in both the gassing solution and the water lubrication solution.
- gassing accelerators such as thiocyanate salts, iodides, sulphanic acid and its salts orthiourea. (Se column 3, line 11-12) In these patents it most common to add the gassing accelerator to the oxidizer solution of the water-in-oil emulsion, or add the gassing accelerator in the gassing solution.
- urea is used as a gassing accelerator, and is added to the water lubrication solution or to the gassing solution.
- urea can be added both to the water lubrication solution and to the chemical gassing solution.
- USP 4,273,147 and USP 4,259,977 describe a method of reducing the pumping pressure in conduits using a lubricant fluid that moves in an annular stream around the emulsion.
- the lubricating fluid comprises a solution of ammonium nitrate, or an aqueous salt solution wherein the salt of the said lubricating fluid corresponds to the major salt present in the explosive emulsion.
- the main purpose with these two patents is to lower the pumping pressure of an emulsion in a conduit, and to prevent the conduit to plug up during interruption of the pumping.
- lubricating fluid does not contain a salt present in explosive emulsion, and the main presence of urea in the lubricating fluid is not to lower the pumping pressure, but to eliminate or reduce the amount of NOx created during the gassing process with nitrite.
- the purpose with this patent is to be able to chemically gas an emulsion explosive rapidly both at low and high temperatures without creating NOx during the gassing process. To accomplish this it is necessary to have an emulsion with a low pH and to use a gassing accelerator. It has surprisingly been found that by lowering the pH by using an organic acid such as citric acid practically eliminates the production of NOx during the gassing process, when urea is used as a gassing accelerator.
- the invention comprises the addition of urea as a gassing accelerator in the gassing solution, and/or using urea as a gassing accelerator in the lubrication fluid.
- HAc does not have the same advantageous effect as CA and TA. It was also surprisingly found that the gassing rate at these low pH emulsions also increased by replacing some ammonium nitrate (AN) in a straight AN emulsion (see example 16), by other inorganic nitrates like sodium nitrate (see examples 6-8 and 10-15) and calcium nitrate. (Se example 17). The NOx produced during the gassing process was still kept at a very low level.
- AN ammonium nitrate
- urea acts as a gassing accelerator as claimed in this current invention
- the gassing rate using different gassing accelerators in the gassing composition were tested.
- the NOx level in the finished sensitised emulsion explosives were also measured. All different gassing compositions had the same level of 15% sodium nitrite and were tested at a 1% level in the given standard emulsion.
- Citric acid 2,0 wt % pH of the oxidiser was measured to 0,98 Fuel Phase :
- the emulsifier was of a polymeric type.
- the emulsion was prepared by slowly adding a stream of oxidiser solution to the fuel phase, with rapid stirring to form a homogeneous water-in-oil emulsion. Both phases kept at an elevated temperature of 80 °C during the preparation of the emulsion. The resulting standard emulsion was left for a day to cool down to room temperature.
- the following components in aqueous solution were combined to provide the following gas forming composition:
- the cup with the sensitised emulsion explosive was transferred to self-made glove- box.
- the glove-box contained a volume of 100 litres, and was equipped with a small 12-volt fan for mixing the air in the box, and a Multi-gas monitor (pm-7400) from Metrosonics Inc.
- the box had a removable Plexiglas top, and the mounted gloves enabled one to use a spatula to stir out the sensitising gas from the emulsion explosive.
- the fan efficiently mixed the sensitising gas with the total of 100 litres of air in the box, and the Multi-gas monitor measured the NOx concentration.
- no accelerator was used in the gas forming composition, and the gassing rate was found to be more than 3 hours, and a concentration of 10 ppm NOx was measured in the glove-box.
- EXAMPLE 8 (according to the invention) The standard emulsion and the same type and amount of gassing component as in EXAMPLE 7 were added. In addition 2% of lubricating water containing 50% urea, was also added. This was done by, first blending in the gassing component for 10 seconds, and then mixing in 2% of the lubrication water for 40 seconds. The gassing rate was measured. It was found that this emulsion composition gassed to density of 0,80 g/cc in 9 min., and reached a final cup density of 0,68 g/cc. When the gas was stirred out of the emulsion in the glove box, no NOx could be detected.
- this gassing component was added to an emulsion where the 2% of citric acid was replaced by 2% of Acetic acid (60%). The gassing component and this emulsion was blended for 40 seconds. The gassing rate was recorded, and it was found that this emulsion composition reached a density of 0,80 g/cc after 40 min.
- the Multi-gas monitor from Metrosonics detected a NOx-concentration of 45 ppm.
- EXAMPLE 10 (according to the invention) The following gassing component was made for this experiment: Sodium Nitrite 15 % Water 85 %
- this gassing component 1 % was added to a standard emulsion containing 0,8% citric acid in the oxidizer solution, and was mixed for 10 seconds. Then 2% of the water lubrication solution was added, and mixed for 40 seconds, at room temperature. The gassing rate was recorded, and it was found that this emulsion composition reached a density of 0,80 g/cc after 15 min., with a final cup density of 0,76 g/cc. after 20 min. When the gas was stirred out of the emulsion in the glovebox, the Multi-gas monitor from Metrosonics detected a NOx- concentration of 0,2 ppm .
- the SME-truck produced an emulsion equal to the one given in EXAMPLE 1 , except that the fuel-phase contains sorbitan mono-oleate (SMO) as an emulsifier rather than a polymeric type.
- SMO sorbitan mono-oleate
- the emulsion is produced at a temperature of about 80 °C, pumped through an 80 meter long loading hose, into the borehole.
- Gassing rate is measured' as time to reach a cup density of 0,80 g/cc NOx is measured as the concentration when the sensiti gas is stirred out of 160 cm gassed emulsion and diluted to 100 litres.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Lubricants (AREA)
- Medicinal Preparation (AREA)
- Air Bags (AREA)
- Colloid Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Cosmetics (AREA)
- Manufacturing Of Micro-Capsules (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20016374A NO315902B1 (en) | 2001-12-27 | 2001-12-27 | Process for producing a sensitized emulsion explosive |
NO20016374 | 2001-12-27 | ||
PCT/NO2002/000494 WO2003055830A1 (en) | 2001-12-27 | 2002-12-20 | A method for preparing a sensitised emulsion explosive |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1458660A1 true EP1458660A1 (en) | 2004-09-22 |
EP1458660B1 EP1458660B1 (en) | 2007-08-29 |
Family
ID=19913192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02783866A Expired - Lifetime EP1458660B1 (en) | 2001-12-27 | 2002-12-20 | A method for preparing a sensitised emulsion explosive |
Country Status (15)
Country | Link |
---|---|
EP (1) | EP1458660B1 (en) |
JP (1) | JP4138661B2 (en) |
KR (1) | KR20040077691A (en) |
AT (1) | ATE371635T1 (en) |
AU (1) | AU2002347688B2 (en) |
BR (1) | BR0215355B1 (en) |
CA (1) | CA2469783C (en) |
CO (1) | CO5590949A2 (en) |
DE (1) | DE60222174T2 (en) |
ES (1) | ES2292828T3 (en) |
NO (1) | NO315902B1 (en) |
PT (1) | PT1458660E (en) |
RU (1) | RU2316529C2 (en) |
WO (1) | WO2003055830A1 (en) |
ZA (1) | ZA200405073B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108349829A (en) * | 2015-09-01 | 2018-07-31 | 悉尼大学 | Blasting agent |
US10801823B2 (en) | 2018-02-20 | 2020-10-13 | Dyno Nobel Inc. | Inhibited emulsions for use in blasting in reactive ground or under high temperature conditions |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004010130B4 (en) * | 2004-03-02 | 2015-03-05 | Maxam Deutschland Gmbh | Process for the preparation and process for the introduction of a high-viscosity emulsion explosive |
CN102070380A (en) * | 2010-12-06 | 2011-05-25 | 陕西华秦新能源科技有限责任公司 | Foaming agent for explosive |
CN103946184B (en) | 2011-11-17 | 2019-09-24 | 戴诺诺贝尔亚太股份有限公司 | Explosive composite |
IN2014DN07817A (en) * | 2012-03-09 | 2015-05-15 | Dyno Nobel Asia Pacific Pty Ltd | |
US9207055B2 (en) | 2013-02-07 | 2015-12-08 | Dyno Nobel Inc. | Systems for delivering explosives and methods related thereto |
RU2544680C1 (en) * | 2013-08-19 | 2015-03-20 | Товарищество с ограниченной ответственностью "Индастриал Эксплозив" | Water-resistant emulsion explosive and emulsion composition for water-resistant explosives |
US20200216369A1 (en) * | 2019-01-04 | 2020-07-09 | Dyno Nobel Asia Pacific Pty Limited | Explosive compositions with reduced fume |
CN111747804B (en) * | 2020-06-22 | 2021-03-16 | 铜陵雷鸣双狮化工有限责任公司 | Emulsion explosive and production process thereof |
KR20230101310A (en) * | 2021-12-29 | 2023-07-06 | 주식회사 한화 | Low density emulsion explosive composition |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2187490B (en) * | 1986-03-05 | 1989-12-06 | Aeci Ltd | Charging of explosives into boreholes |
ZA962552B (en) * | 1995-04-05 | 1996-10-07 | Aeci Explosives Ltd | Explosive |
-
2001
- 2001-12-27 NO NO20016374A patent/NO315902B1/en not_active IP Right Cessation
-
2002
- 2002-12-20 AU AU2002347688A patent/AU2002347688B2/en not_active Ceased
- 2002-12-20 RU RU2004119560/02A patent/RU2316529C2/en active
- 2002-12-20 ES ES02783866T patent/ES2292828T3/en not_active Expired - Lifetime
- 2002-12-20 WO PCT/NO2002/000494 patent/WO2003055830A1/en active IP Right Grant
- 2002-12-20 EP EP02783866A patent/EP1458660B1/en not_active Expired - Lifetime
- 2002-12-20 BR BRPI0215355-6A patent/BR0215355B1/en not_active IP Right Cessation
- 2002-12-20 CA CA002469783A patent/CA2469783C/en not_active Expired - Fee Related
- 2002-12-20 PT PT02783866T patent/PT1458660E/en unknown
- 2002-12-20 DE DE60222174T patent/DE60222174T2/en not_active Expired - Lifetime
- 2002-12-20 JP JP2003556366A patent/JP4138661B2/en not_active Expired - Fee Related
- 2002-12-20 AT AT02783866T patent/ATE371635T1/en not_active IP Right Cessation
- 2002-12-20 KR KR10-2004-7010187A patent/KR20040077691A/en active IP Right Grant
-
2004
- 2004-06-25 ZA ZA2004/05073A patent/ZA200405073B/en unknown
- 2004-07-14 CO CO04066834A patent/CO5590949A2/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03055830A1 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108349829A (en) * | 2015-09-01 | 2018-07-31 | 悉尼大学 | Blasting agent |
EP3344595A4 (en) * | 2015-09-01 | 2020-12-16 | The University of Sydney | Blasting agent |
US11203555B2 (en) | 2015-09-01 | 2021-12-21 | The University of Sydney Commercial Development & Industry Partnerships | Blasting agent |
US10801823B2 (en) | 2018-02-20 | 2020-10-13 | Dyno Nobel Inc. | Inhibited emulsions for use in blasting in reactive ground or under high temperature conditions |
US11346643B2 (en) | 2018-02-20 | 2022-05-31 | Dyno Nobel Inc. | Inhibited emulsions for use in blasting in reactive ground or under high temperature conditions |
Also Published As
Publication number | Publication date |
---|---|
ATE371635T1 (en) | 2007-09-15 |
NO20016374L (en) | 2003-06-30 |
DE60222174T2 (en) | 2008-06-12 |
AU2002347688A1 (en) | 2003-07-15 |
RU2004119560A (en) | 2006-01-10 |
WO2003055830A1 (en) | 2003-07-10 |
DE60222174D1 (en) | 2007-10-11 |
JP2005512937A (en) | 2005-05-12 |
CA2469783C (en) | 2008-02-12 |
BR0215355A (en) | 2004-12-14 |
AU2002347688B2 (en) | 2007-06-07 |
RU2316529C2 (en) | 2008-02-10 |
CO5590949A2 (en) | 2005-12-30 |
NO315902B1 (en) | 2003-11-10 |
ES2292828T3 (en) | 2008-03-16 |
BR0215355B1 (en) | 2011-10-04 |
KR20040077691A (en) | 2004-09-06 |
ZA200405073B (en) | 2005-08-31 |
EP1458660B1 (en) | 2007-08-29 |
JP4138661B2 (en) | 2008-08-27 |
PT1458660E (en) | 2007-12-06 |
NO20016374D0 (en) | 2001-12-27 |
CA2469783A1 (en) | 2003-07-10 |
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