FLOTATION PRODUCTS DEVELOPED FOR USE BY MIXING WITH OR ADDING TO WATER IN WET-TYPE COLLECTOR APPARATUS FOR THE CONTROLLED FLOTATION OF SOLID PARTICLES REMOVED FROM AIR OR OTHER GASES, TO FLOAT SOLID MATERIALS SUCH AS DUST, DIRT, FIBROUS MATERIAL, OR STEEL SHREDS, E. G. FROM BUFFING OPERATIONS, FOR USE IN FLOATING AGGLOMERATED MASSES OF SOLID PARTICLES COLLECTED BY SUCH APPARATUS, FOR USE IN CONTINUOUS SEPARATION BY PREFERENTIAL FLOTATION OF METAL PARTICLES FROM MIXTURES OF METAL PARTICLES AND OTHER SUBSTANCES, FOR SEPARATION BY PREFERENTIAL FLOTATION OF FINELY DIVIDED SOLD CHEMICAL PRODUCTS, AND FOR USE IN THE INHIBITION OF CORROSION OF SUCH COLLECTOR APPARATUS AND FOR INHIBITING THE CORROSION OF THE FERROUS PARTICLES COLLECTED IN SUCH APPARATUS