NZ204932A - Vehicle mounted emulsion explosives static mixer - Google Patents

Vehicle mounted emulsion explosives static mixer

Info

Publication number
NZ204932A
NZ204932A NZ204932A NZ20493283A NZ204932A NZ 204932 A NZ204932 A NZ 204932A NZ 204932 A NZ204932 A NZ 204932A NZ 20493283 A NZ20493283 A NZ 20493283A NZ 204932 A NZ204932 A NZ 204932A
Authority
NZ
New Zealand
Prior art keywords
static mixer
component
emulsion
liquid
mixing device
Prior art date
Application number
NZ204932A
Inventor
P S J Halliday
J G B Smith
Original Assignee
Aeci 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 Aeci Ltd filed Critical Aeci Ltd
Publication of NZ204932A publication Critical patent/NZ204932A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/41—Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/49—Mixing systems, i.e. flow charts or diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/59—Mixing systems, i.e. flow charts or diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/502—Vehicle-mounted mixing devices
    • B01F33/5021—Vehicle-mounted mixing devices the vehicle being self-propelled, e.g. truck mounted, provided with a motor, driven by tracks
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/34—Mixing fuel and prill, i.e. water or other fluids mixed with solid explosives, to obtain liquid explosive fuel emulsions or slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Liquid Carbonaceous Fuels (AREA)

Description

204932 Priority Date(s): .-7 <?■> Complete Specification Filed: Class: tefl8V/ootno/m£fo Publication Date: .... J??.®. J., P.O. Journal, No: NEW ZEALAND PATENTS ACT, 1953 No.: Date: COMPLETE SPECIFICATION AN EXPLOSIVES MIXING DEVICE AECI LIMITED of 16th Floor, Office Tower, Carlton Centre, Commissioner Street, Johannesburg, Transvaal Province, Republic of South Africa, a South African Company hereby declare the invention for which K/ we pray that a patent may be granted to eace/us, and the method by which it is to be performed, to be particularly described in and by the following statement:- 204932 THIS INVENTION relates to an explosive mixing device. In particular it relates to a mobile explosives mixing device suitable for on-site mixing of emulsion explosives.
According to one aspect of the invention, there is provided a mobile vehicular mounted mixing device for the preparation of an emulsion explosive composition from a liquid oxidizing component and a liquid fuel component which device comprises at least one static mixer adapted to form an emulsion from said liquid components and pumping means capable of forcing said liquid components through said static mixer(s) at a pressure sufficient to form said emulsion explosive composition.
In another aspect, the invention consists in a method for the preparation of an emulsion explosive composition from a liquid oxidizing component and a liquid fuel component in a mobile vehicular mounted mixing device comprising forcing said liquid components through at least one vehicular mounted static mixer adapted to form an emulsion from said liquid component at a pressure sufficient to form said emulsion explosive composition.
The vehicle may be in the form of a truck, and the device may include a placer pump on the truck for pumping explosive from the static mixer(s) down a hole, and storage tanks on the truck for the oxidizer component and the fuel component respectively, each tank being provided with a discharge pump for pumping the associated component at a desired flow rate and pressure to the static mixer(s).
There may be a single static mixer, or several static mixers arranged in series. Downstream of the static mixer(s), which will be connected to the tanks by appropriate flow lines, there will be a discharge flow line provided with said placer pump.
The discharge pumps for the oxidizer and fuel component tanks should be capable of forcing the components under turbulent flow conditions and pressures of about 1000 PSI (7MPa) or more through the static mixer(s), to form a suitable emulsion.
The device may include at least two static mixers, one or a number of which can be connected in line in series between the storage tanks and the placer pump, in different combinations, so as, within limits, to be able to vary the emulsion properties of the emulsion explosive, such as droplet size, rheology, or the like, as requirements in this regard can vary from site to site, and also with the nature of the explosive used. 20493a I The component tanks may be insulated and be provided with heating means, and means may be provided downstream of the static mixer(s) for doping and blending the explosive with a sensitizer such as microbal loons, gas bubbles, atomised aluminium, or the like, the means being located on the truck. The means for doping and blending the explosive with sensitizer may be a separate blender located upstream of the placer pump.
The invention will now be described, by way of example, with reference to the accompanying diagrammatic drawing, which shows, schematically, in plan view outline, an explosives mixing device in accordance with the invention.
In the drawing, reference numeral 10 generally designates an explosives mixing device in accordance with the invention. The device comprises a truck 12 having a cab 13 and load bed 14 on which is mounted on oxidizing component storage tank 18 and a fuel component storage tank 16. The tanks 16, 18 have discharge flow lines respectively designated 20 and 22, and respectively provided with discharge pumps 24 and 26. The flow line 20 feeds into the inlet of a first static mixer 28 mounted on the load bed 14 of the truck. The flow line 22 feeds into both the feed line 20 directly at the inlet of the first static mixer 28 and into a discharge flow line 30 leading from the first static mixer. Discharge flow line 30 leads to a further static mixer 42 mounted on the load bed 14. The static mixer 42 has a discharge flow line 44 which leads to a third static mixer 54 mounted on the load bed 14 and having a discharge flow line 56. The discharge flow line 56 discharges into a placer pump 60 having its own discharge flow line 62. A sensitizer storage hopper 64 is provided feeding via feed means 66 into the flow line 56 upstream of the pump 60. The feed means 66 feeds into the flow line 56 by means of a blender 68 for blending the sensitizer into the emulsion.
The tanks 16, 18 are provided with insulation and heating means (not shown).
It will be appreciated that, using appropriate fittings (not shown), such as valves, bypass flow lines, etc., the static mixer 28 alone can be placed in series between the tanks 16, 18 on the one hand, and the blender 68 on the other hand, or both the mixers 28, 42 can be placed in series 30 J \" .. •• .... 204932 said tanks and blender, or indeed all three mixers, 28,42 and 54 can be placed in series between said tanks and blender, as desired.
It is contemplated that the static mixer 28 will be a coarse mixer, adapted to form a coarse emulsion. The mixers 42 and 54 will be progressively finer, so as to produce, when used, progressively finer emulsions. The pumps 24,26 will have an output pressure of 1000 PSI 7MPa) or more, and flows of from about 50 to about 80 kg/min (i.e. from about 0,8 to about 1,3 kg/s).
An example of a formulation which can be used by the device 10 is the following: Component Percentage by mass Ammonium nitrate (oxidizing salt) 58,17 Sodium nitrate (oxidizing salt) 14,00 Calcium Nitrate 3,47 Water 11,99 P95 fuel oil (paraffinic hydrocarbon fuel available from BP Southern Africa (Proprietary) Limited) 2,00 Span 80 (sorbitan monooleate emulsifier available from Atlas Oil & Chemical Company (Proprietary) Limited) 0,70 Soya lecithin 0,70 B246 (emulsifier available from Imperial Chemical Industries PLC- Paints Division) 0,30 SASOLWAKS Ml Paraffin wax, available from SASOL Marketing Company Limited 1,34 CI5/50 microballoons (available from 3M (South Africa) (Proprietary) Limited) 2,44 Atomised Aluminium, available from HULETTS SA (Pty) Ltd 4,89 204932 It is contemplated that ammonium nitrate and water, will be premixed at the factory, and after being preheated to about 85°C, will be transported to the site by insulated and heated tankers. Sodium and calcium nitrate and any other oxidizer ingredients will be mixed on-site with the ammonium nitrate and water, in heated, stirred, insulated storage tanks, to form an oxidiser component. A fuel component comprising all the remaining constituents except for the microballoons and atomised aluminium, can similarly be mixed on-site, heated and stirred in insulated storage tanks, to form a fuel component. These extra storage tanks (not shown) can conveniently be mounted on the truck adjacent the tanks 16 and 18, being used respectively to fill the tanks 16 and 18. In the tanks 16 and 18, the temperatures of the components will be maintained, and when blasting holes are to be charged, the pumps 24, 26 and 60 will be operated to mix the components and place the explosive. The feed means 66 will be used to feed the microballoons and atomized aluminium, as a mixture, from hopper 64 to the emulsion, upstream of the pump 60, which emulsion is at 60-70°C.
An advantage of the invention is its simplicity and versatility. The components required for the device are inexpensive, and substantially maintenance free. Safety is enhanced as the static mixers have no moving parts, and the device is versatile in that various combinations of static mixers can be used for controlling emulsion properties as described above. The device can therefore cater for many different applications, including the cartridging of explosives on-site.
The static mixers are convenient to mount on the truck, leading to a saving in space. All the componens can thus be mounted in convenient and easily accessible positions on the truck load bed 14.

Claims (14)

504-932 WHAT */WE CLAIM IS:
1. A mobile vehicular mounted mixing device for the preparation of an emulsion explosive composition from a liquid oxidizing component and a liquid fuel component which device comprises at least one static mixer adapted to form an emulsion from said liquid components and pumping means capable of forcing said liquid components through said static mixer(s) at a pressure sufficient to form said emulsion explosive composition.
2. A mixing device according to Claim 1 wherein said pumping means is capable of forcing said liquid components through said static mixer(s) under turbulent flow conditions and at pressures of 1000 psi or more.
3. A mixing device according to Claim 1 or Claim 2 wherein the vehicle is in the form of a truck and wherein the device includes a placer pump on the truck for pumping explosive from the static mixer(s) down a hole, and storage tanks on the truck for the oxidizer component and the fuel component respectively, each tank being provided with a discharge pump for pumping the associated component at a desired flow rate and pressure to the static mixer(s).
4. A mixing device according to Claim 3 which comprises at least two static mixers connected in-line in series between the storage tanks and the placer pump.
5. A mixing device according to Claim 3 or Claim 4 wherein the component tanks are insulated and are provided with heating means, and wherein means are provided downstream of the static mixer(s) for doping and blending the explosive with a sensitizer, the means eing located on the truck. - 1 - 204932
6. A mixing device according to Claim 5 wherein the means for doping and blending the explosive with the sensitizer is a separate blender located upstream of the placer pump.
7. A mobile explosives mi xing device according to Claim 1, substantially as described and illustrated herein.
8. A method for the preparation of an emulsion explosive composition from a liquid oxidizing component and a liquid fuel component in a mobile vehicular mounted mixing device comprising forcing said liquid components through at least one vehicular mounted static mixer adapted to form an emulsion from said liquid component at a pressure sufficient to form said emulsion expl osive composition.
9. A method according to Claim 8 wherein said liquid components are forced through said static mixer(s) under turbulent flow conditions and at pressures of 1000 psi or more.
10. A method according to Claim 8 or Claim 9 wherein the vehicle is in the form of a truck comprising a placer pump for pumping explosive from the static mixer(s) down a hole, storage tanks for the oxidizer component and the fuel component respectively, each tank being provided with a discharge pump for forcing the associated component through the static ir.ixer(s) to form the emulsion explosive composition. - 8 - 204932
11. A method according to Claim 10 wherein said liquid components are forced through at least two static mixers connected in-line in series between the storage tanks and the placer pump to form said emulsion explosive composition.
12. A method according to any one of Claims 8 to 11 inclusive wherein sensitizer is blended into the emulsion explosive composition downstream of saic static mixer(s).
13. A method according to any one of claims 8 to 12 inclusive wnerein the liquid oxidizing component comprises an aqueous solution of oxidizing salt comprising ammonium nitrate, sodium nitrate, calcium nitrate or a mixture of two or more of saic nitrates, and the fuel component comprises fuel oil, paraffin wax or a mixture thereof and one or more e.-nulsi f iers.
14. A method for the preparation of an emulsion explosive composition according to any one of Claims 8 to 13 inclusive substantially as descriDec and illustrated herein. L4...C&L By -Hrs/Their authorised Agent A. J. PARK & SON Por: yctf. r\--\ 23 JUN1986
NZ204932A 1982-07-28 1983-07-18 Vehicle mounted emulsion explosives static mixer NZ204932A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA825426 1982-07-28

Publications (1)

Publication Number Publication Date
NZ204932A true NZ204932A (en) 1986-08-08

Family

ID=25576184

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ204932A NZ204932A (en) 1982-07-28 1983-07-18 Vehicle mounted emulsion explosives static mixer

Country Status (4)

Country Link
AU (1) AU551884B2 (en)
GB (1) GB2126910B (en)
NZ (1) NZ204932A (en)
ZW (1) ZW16283A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4526633A (en) * 1982-11-08 1985-07-02 Ireco Incorporated Formulating and delivery system for emulsion blasting
IE55173B1 (en) * 1984-04-13 1990-06-20 Roadstone Dublin Ltd Ready mixed concrete delivery truck
ATE55593T1 (en) * 1985-05-24 1990-09-15 Ireco Inc DEVICE AND PROCESS FOR THE MANUFACTURE AND DELIVERY OF EXPLOSIVES.
DE3779447D1 (en) * 1986-03-06 1992-07-09 Kern & Grosskinsky DEVICE FOR PRODUCING A DETOXIFICATION EMULSION FOR COMBAT SUBSTANCES.
AU602082B2 (en) * 1987-06-15 1990-09-27 Orica Explosives Technology Pty Ltd Mobile mixer
DE4108186A1 (en) * 1991-03-14 1992-09-17 Bayer Ag METHOD AND DEVICE FOR PRODUCING A POLYURETHANE REACTION MIXTURE
GB9201048D0 (en) * 1992-01-17 1992-03-11 Conoco Limited Metering of additives into fuels
GB9804296D0 (en) * 1998-03-02 1998-04-22 Exchem Plc Explosive emulsion mixing vehicle
GB0205559D0 (en) * 2002-03-11 2002-04-24 Bae Systems Plc Improvements in and relating to the filling of explosive ordnance
FR3000957A1 (en) 2013-01-16 2014-07-18 Nitrates & Innovation MODULAR INSTALLATION FOR MANUFACTURING AN EXPLOSIVE EMULSION PRECURSOR
AU2014406966B2 (en) 2014-09-26 2018-10-25 Shijiazhuang Success Machinery Electrical Co., Ltd In-site explosive loading truck for intrinsic safety-type emulsion explosive
US10226745B2 (en) 2014-10-16 2019-03-12 Shijiazhuang Success Machinery Electrical Co., Ltd. Emulsion matrix ground station with intrinsic safety
FR3106073B1 (en) 2020-01-10 2022-01-21 Nitrates & Innovation Installation for preparing an explosive composition and process for preparing an explosive composition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2532355C3 (en) * 1975-07-19 1979-06-07 Bayer Ag, 5090 Leverkusen Device for static mixing of flowable substances
GB1580788A (en) * 1976-04-20 1980-12-03 Bates P Concrete mixing

Also Published As

Publication number Publication date
ZW16283A1 (en) 1984-03-07
GB2126910A (en) 1984-04-04
AU1692583A (en) 1984-02-02
AU551884B2 (en) 1986-05-15
GB8319720D0 (en) 1983-08-24
GB2126910B (en) 1986-04-16

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