Agglomeration unit

Agglomerating unit comprising a chamber (1) having means defining a conical, downwardly narrowing portion of the chamber (2), at the top of the chambers means defining an upper stationary annular portion of the chamber (3) which at least at its lower end is of circular cross-section of substantially the same diameter as the largest diameter of the conical portion closely adjacent thereto and coaxial therewith, means defining a lower stationary portion of the chamber (4) disposed below said conical portion, which at least at its upper end is of circular cross-section of substantially the same diameter as the smallest diameter of the conical portion closely adjacent thereto and coaxial therewith, an atomizer wheel (6) disposed coaxially in said chamber and connected with at least one pipe means (7,8) or flowing wetting liquid to said atomizer wheel and an axial powder injection pipe (9) extending upwardly in said chamber and terminating in the region below said atomizer wheel, wherein only said means defining a conical portion (2) is mounted for rotation around its axis, and a stationary scraper (1) fixedly secured to said means defining an upper portion (3) and to said means defining a lower portion (4) said scraper extending downwardly to at least the lower edge of said conical portion in close proximity to the inner surface of said conical portion.