Abstract: The continuous production of an explosive is achieved by intermixing at least two liquid component streams in an apparatus including a mixing rotor generally formed like a turbine impeller and freely rotatably supported in a housing directly opposite an inlet opening for one of the liquid components. The passing liquid stream imparts a rotational motion to the mixing rotor and the liquid components are effectively mixed by shear and turbulence in an annular narrow mixing zone between the outer periphery of the rotor and the inner wall of the housing. Preferably the entire surface of the mixing rotor is surrounded by the flowing liquid components, thus providing a low friction hydrostatic rotor support.