Continuous flow static mixer for mixing powder and/or suspension materials with liquid materials

A static mixer for mixing in a continuous flow powder and/or suspension materials with liquid materials, and especially for intermixing the material components of an explosive, said mixer comprising a toroidal mixing chamber, an inlet for each powder and/or suspension component centrally and coaxially disposed in the chamber, at least one spreader body having a substantially conical spreading surface centrally disposed and in a spaced and downstream relationship to the powder/suspension inlet(s), an annular inlet in the chamber for each liquid component, each said powder/suspension inlet being in the form of a pipe nozzle communicating with a pressure vessel containing fluidized powder components and/or suspension components, each said liquid inlet being in the form of an annular conical slit-nozzle communicating with a liquid-containing pressure vessel, each said conical spreading surface and each said conical slit-nozzle being so axially and angularly disposed relative to each other such that in operation of the mixer the high speed conical powder/suspension sprays leaving each said conical spreading surface hit the high speed conical liquid sprays from each said conical slit-nozzle in a common unsupported or floating circular mixing zone in said mixing chamber.