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Blasting compositions

A composition and explosive technology, applied in explosives, non-explosive/non-thermic components, offensive equipment, etc., can solve problems such as blocking key equipment, damaging products, and depending on volume density

Inactive Publication Date: 2014-07-23
DYNO NOBEL ASIA PACIFIC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical disadvantages of ANFO are: (i) the presence of relatively small amounts of water damages the product; (ii) the detonation energy (volume strength) per unit volume of the mixture is fixed for a given ammonium nitrate pellet and depends only on its volume density; and (iii) the velocity of detonation (VOD) is limited to relatively modest values
However, use of such materials requires modifications to existing explosives delivery machinery, and their use can lead to material buildup that can plug critical equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 01- 2

[0046] Example 01 - dimer acid

[0047] A dimer acid (36 carbon units) was tested as a binder in an emulsion blasting composition. The stability of the emulsion remained good and had an overall improved water resistance when compared to the standard emulsion without added binder. About 10% to 30% of the fuel components are replaced with dimer acid. It dissolves easily in diesel. The explosive mixture allows 28 to 94% AN and 1.8 to 6% fuel oil. Both HDAN and LDAN grains can be used.

Embodiment 02

[0048] Example 02 - Oleayl dimer monostearate

[0049] Oleyl dimer stearate (C54) was tested. It has good emulsification stability and good water resistance. The binder replaces 10% to 30% of the fuel components, and it is easily soluble in diesel fuel, and is mixed with HDAN and LDAN pellets, 56-94% AN and 1.8-6% FO.

Embodiment 03

[0050] Example 03 - Oleyl Dimer Distearate

[0051] The oleyl dimer distearic acid (C72) was tested. It has good emulsification stability and good water resistance. The binder replaces 10% to 30% of the fuel components, and it is easily soluble in diesel fuel, and is mixed with HDAN and LDAN pellets, 56-94% AN and 1.8-6% FO.

[0052] Example 04 - Dimer Acid / Genamin OL500D

[0053] Dimer acid and Genamin tested TM A mixture of OL500D. Genamin OL500D is a distilled ammonium oleyl acetate compound. Has average emulsion stability with some slight crystallization. The binder replaces 20% to 50% of the fuel components, and it is easily soluble in diesel, and is mixed with HDAN and LDAN pellets, 56-94% AN and 1.8-6% FO.

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Abstract

A blasting explosive composition containing a solid inorganic oxidising salt as the oxidizer component, a hydrocarbon liquid as the fuel component, and a binding agent. The composition can also contain an ammonium nitrate based emulsion. The binding agent can increase the water resistance, or increase the sleep time, of the explosive composition, or increase the fuel oil absorbency of the solid inorganic oxidising salt. The binding agent is selected from one or more of a long chain carboxylic acid and its salts and derivatives, especially those having from 8 to 100 or preferably 10 to 50 carbon units. The binding agent may preferably be selected from one or more of: dimer acid, trimer acid, polyisobutylene succinic anhydride, oleic acid, stearic acid, sorbitan tristearate, and their salts and esters.

Description

technical field [0001] This invention relates to explosive compositions and methods of making and using these explosive compositions. More particularly, the explosive of the present invention is a multicomponent explosive formulation having a modified fuel phase. These explosive compositions are used for blasting in, but not limited to, mining operations and the like. In particular, although not exclusively, the present invention relates to the manufacture and use of various forms of ammonium nitrate fuel oil (ANFO) based explosives modified by the incorporation of a binder in the fuel oil. Background technique [0002] ANFO mixtures are commonly used as explosives in mining and other applications. These mixtures provide effective blasting effects, especially when low bulk density explosive grade ammonium nitrate (EGAN) pellets are used. Such EGANs are manufactured with a porous outer surface, which absorbs enough fuel oil to provide a slightly negative oxygen balanced ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/28
CPCC06B31/285C06B47/145C06B47/00C06B23/009C06B31/28C06B45/08C06B45/18C06B23/00
Inventor 埃玛·麦克费尔布伦达·格里格斯杰夫·戈尔拿单·帕里斯
Owner DYNO NOBEL ASIA PACIFIC LTD
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