Aerating apparatus

摘要

PCT No. PCT/EP85/00138 Sec. 371 Date Nov. 20, 1985 Sec. 102(e) Date Nov. 20, 1985 PCT Filed Mar. 30, 1985 PCT Pub. No. WO85/04432 PCT Pub. Date Oct. 10, 1985.The aeration of dispersions, especially the aeration of fiber suspensions in a flotation apparatus 1, is performed with a ring injector 2 to which air is delivered through air feed ducts 11 in the mixing section 4. The annular gap forming in the ring injector 2 is thus aerated inside and out. The center core 7, which tapers in the direction of the greatest free cross section Q4 of the ring injector 2, is provided with a fin 56 which prevents the rotation of the dispersion.