Abstract
The equipment has been developed and the process of granulation of liquid selenium into water has been implemented. The process of selenium granulation is implemented at a temperature of 225–250 °C through unheated sieves with a diameter of holes of 1–2 mm at a density of perforation from 279 to 417 holes/dm2. The specific productivity reaches 180 kg/(dm2 × h), which corresponds to industrial-scale production. Electron microscopy studies revealed the localization of impurity elements in both the raw and granulated selenium. The composition and concentration of elements in localized areas were found to be random. For example, one area contained (by mass %) C—7.64; S—6.04; As—4.85; and Pb—40.72. Another, located nearby, contained C—4.68; Te—45.42; and Pb—12.67. In granulated selenium there was a noted increase in the number of spherical or close to spherical in shape voids, on the boundaries of which impurity elements were concentrated. The change in chemical composition of granules in comparison with the initial selenium was not established. The use of a granulated element is accompanied by simplification of manipulations with dispersed material and improvement of dosing conditions in technological processes using selenium.