Water resistance additive for particulate ammonium nitrate-fuel oil (ANFO) explosives

A granular and explosive technology, applied in the direction of non-explosive/non-thermal agent components, non-explosive fillers/gelling agents/thickeners, explosives, etc., can solve the problem of not providing ANFO water resistance

Inactive Publication Date: 2018-09-07
CLARIANT INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, blending of emulsions with ANFO requires additional specialized equipment
Therefore, EP-A-0276934 does

Method used

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  • Water resistance additive for particulate ammonium nitrate-fuel oil (ANFO) explosives
  • Water resistance additive for particulate ammonium nitrate-fuel oil (ANFO) explosives
  • Water resistance additive for particulate ammonium nitrate-fuel oil (ANFO) explosives

Examples

Experimental program
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Effect test

Embodiment Construction

[0129] Water resistance test

[0130] In these examples, water resistance was measured as the parts by mass of ANFO samples remaining after exposure to a water-saturated substrate for 24, 48, or 72 hours, respectively. In the water resistance test, ANFO samples were prepared using the LDAN / fuel ratio (wt %) given in Table 4. Oil soluble polymers, if present, are part of the fuel component.

[0131] For the test, the absorbent sponges were placed in the water tray so that the lower half of the sponges were submerged keeping the entire surface of each sponge moist. Spread paper towels over sponge to provide an even surface. Keep paper towel saturated with water by sponge underneath. A 10.0 g sample of ANFO was weighed and placed into a cylindrical mold set on a temporary plastic sleeve. The mold was then placed on a saturated paper towel and the temporary bottom casing was removed, exposing the ANFO to the wet surface. After storage at ambient temperature for 24, 48 or 72 h...

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Abstract

The present invention provides for the use of at least one oil soluble polymer comprising linear polymethylene sequences with an average of 10 to 40 consecutive methylene groups to improve the water resistance of an explosive composition comprising particulate ammonium nitrate and a fuel oil, said linear polymethylene sequences with in average 10 to 40 consecutive methylene groups may be either inthe main chain or in the side chains of the oil soluble polymer.

Description

technical field [0001] The present invention relates to fuel soluble or fuel dispersible hydrophobic water repellent additives which may be added to particulate ammonium nitrate-fuel oil (ANFO) explosive mixtures to impart water resistance. Background technique [0002] The prior art on ANFO is described in "Ammonium nitrate blasting agents from manufacture to field use", Proceedings of the 6th General ISEE Annual Meeting, Tampa, FL, June 28, 2000, Fred C. Drury, Executive Vice President , ECONIX, Inc., Wheaton, IL. [0003] Ammonium nitrate is generally used as an effective and economical mining explosive mainly in the form of emulsion explosives, slurry explosives or mixtures with fuel oil. [0004] Emulsion explosives are water-in-oil dispersions comprising a continuous phase of fuel and an internal liquid phase of ammonium nitrate and / or other nitrates (oxidizers) in water. Emulsion explosives are viscous liquids. They typically contain 73 to 76% by weight of ammonium...

Claims

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Application Information

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IPC IPC(8): C06B23/00C06B31/28
CPCC06B23/001C06B31/285C06B23/009
Inventor M·菲欧斯蒂欧M·克鲁里I·J·托利迪C·R·柯林斯M·弗兰吉科T·罗伊
Owner CLARIANT INT LTD
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