Ammonium nitrate blasting agent and method of production

Inactive Publication Date: 2005-12-08
NEXCO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0007] The invention therefore provides an ANFO blasting agent that may be manufactured with a density that may be tailored to suit a variety of different specific applications or requirements. The blasting agent of the invention exhibits velocities of detonation beyond those of traditional ANFO, and may be formed w

Problems solved by technology

ANFO is a low cost explosive with a low velocity of detonation and with poor water resistance.
ANFO also has a relatively low density of approximately 0.85 g/cc, resulting in relatively low bulk strength.
The disadvantages of waterg

Method used

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  • Ammonium nitrate blasting agent and method of production

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Embodiment Construction

[0019] The present invention may be embodied in a number of different forms. However, the specification and drawings that follow describe and disclose only some of the specific forms of the invention and are not intended to limit the scope of the invention as defined in the claims that follow herein.

[0020] A method of producing an ammonium nitrate blasting agent in accordance with one of the preferred embodiments of the present invention is shown schematically in FIG. 1. The method consists of three primary steps or stages; namely, the mixing of an aqueous solution of ammonium-nitrate and a crystal habit modifier, the formation of fine grained ammonium nitrate crystals, and the combination of the ammonium nitrate crystals with an organic carbonaceous fuel, with or without various other additives, to form an ammonium nitrate blasting agent. Each of these primary stages will now be described in more detail.

[0021] With reference to FIG. 1, an aqueous solution of ammonium nitrate may ...

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Abstract

A method of producing an ammonium nitrate blasting agent and such an agent. The method comprises the steps of first combining together a crystal habit modifier with an aqueous solution of ammonium nitrate. Using the mixture of the crystal habit modifier and the ammonium nitrate solution, ammonium nitrate crystals are formed having a particle size of about 1 to about 500 microns. The ammonium nitrate crystals are then combined with an organic carbonaceous fuel at a ratio such that the organic carbonaceous fuel is from about 2 to about 10 percent by weight of the blasting agent.

Description

FIELD OF THE INVENTION [0001] This invention relates generally to the field of explosives and blasting agents, and in particular to an ammonium nitrate blasting agent and its method of production. BACKGROUND OF THE INVENTION [0002] Explosives or blasting agents, and in particular ammonium nitrate explosives, are used for a wide variety of different industrial applications ranging from mining, to mineral exploration, to civil engineering applications. Currently, there are three major classifications of commercial explosives that are based upon ammonium nitrate. These three classes are ANFO (explosives grade ammonium nitrate prills and fuel oil), watergels (slurry explosives) and ammonium nitrate based emulsions. Each form of explosive has its own particular advantages and disadvantages. [0003] ANFO is a low cost explosive with a low velocity of detonation and with poor water resistance. ANFO also has a relatively low density of approximately 0.85 g / cc, resulting in relatively low bul...

Claims

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Application Information

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IPC IPC(8): B01J2/04C01C1/18C06B23/00C06B31/28
CPCC01C1/18C06B31/285C06B23/002C01P2004/61C06B31/28
Inventor PRESTON, CHRISTOPHER
Owner NEXCO INC
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