초록 ▼

In a process for the production of a ‘water-in-fuel’or ‘melt-in-fuel’emulsion explosive a density-reducing agent is introduced and dispersed in the emulsion at an elevated temperature whereat the emulsion is essentially liquid, the explosive is cartridged and then subsequently cooled by means of a r

In a process for the production of a ‘water-in-fuel’or ‘melt-in-fuel’emulsion explosive a density-reducing agent is introduced and dispersed in the emulsion at an elevated temperature whereat the emulsion is essentially liquid, the explosive is cartridged and then subsequently cooled by means of a refrigerated fluid so that the continuous phase solidifies and stabilizes the dispersion of the density-reducing agent in the explosive. Preferably, when the density-reducing agent comprises gas bubbles the explosive is subjected to an elevated pressure before it is cartridged in order to ensure that the sensitivity of the explosive will not be impaired by disturbance of gas bubbles by any pressure drop which might occur during cartridging. The invention also extends to a cartridging machine for cartridging emulsion explosive, the machine comprising a container defining a sealed pressurizable explosives chamber which has an explosives inlet and at least one explosives outlet provided with a positive displacement pump for pumping explosive from the chamber into a cartridge.

대표청구항 ▼

In the production of a cartridged explosive in the form of an emulsion which comprises a discontinuous phase which forms an oxidizing salt-containing component and a continuous phase which is immiscible with the discontinuous phase and which form a fuel component, by forming a base emulsion comprisi

In the production of a cartridged explosive in the form of an emulsion which comprises a discontinuous phase which forms an oxidizing salt-containing component and a continuous phase which is immiscible with the discontinuous phase and which form a fuel component, by forming a base emulsion comprising said oxidizing salt-containing component and said fuel component, introducing gas bubbles into said base emulsion and dispersing them therein while the base emulsion is at an elevated temperature and is essentially liquid to form an explosive, cartridging the explosive, and the cooling the cartridged explosive by means of a refrigerated fluid so that the continuous phase solidifies, thereby to entrap the bubbles and stabilize their positions in the explosive, a process which comprises the step, after the introduction of bubbles into the base emulsion, of subjecting the explosive to an elevated pressure before it is cartridged.