Abstract: An ejector for bringing an explosive liquid into an aqueous emulsion for transport along a pipe has a water-injection nozzle leading into an explosive-intake chamber, and a diffuser of progressively outflaring section extending from said chamber coaxial to the nozzle. An explosive inlet duct leads tangentially into said chamber which is defined by converging conical surfaces whereby the explosive is gradually accelerated along a helical path of progressively decreasing cross-sectional area up to a zone of contact with water from the injection nozzle.