Powder metallurgy industry, economics, and organization of production - Porous powder dispersers for dispersing ozone and air in water

A description is presented of a manufacturing process for large-diameter (1 80-300 mm) disks of sintered titanium corrosion-resistant steel and bronze. The properties of the initial powders and sintered disks are presented and the dimensions of the bubbles which are formed are examined in relation to the parameters of the pore structure. Photographs of the microstructure of a disk are shown along with a scan of the disk surface. A description is g iven of porous disperser PA-2, which is designed for dispersing ozone and a ir in wafer. Ifs porous disk is made from titanium powder, while its housin g and nozzle are made of corrosion-resistant steel. If is shown that replac ing 1000 ceramic tube dispersers made by the German firm "Schumacher" by 20 00 PA-2 dispersers in the city of Minsk's treatment system for drinking waf er, which has a daily capacity of 200000 m(3), made if possible to reduce t he amount of ozone and gas that has to be injected for the treatment while keeping the purification level constant. None of the PA-2 dispersers had to be replaced over a 10-year period of operation.