Process for removing selenium values
Abstract
Abstract IN AN OPERATION WHEREIN SELENIUM VALUES ARE RECOVERED FROM PELLETIZED SELENIUM-CONTAINING MATERIALS INVOLVING HEATING PELETIZED SELENIUM-CONTAINING MATERIALS IN THE PRESENCE OF AIR SO AS TO VOLTILIZE THE SELENIUM FROM SAID PELLETIZED SELENIUM-CONTAINING MATERIALS IN THE FORM OF SELENIUM DIOXIDE, IMPROVED RESULTS ARE OBTAINED BY EMPLOYING AN APPARATUS WHEREIN A MASS OF PELLETIZED SELENIUM-CONTAINING MATERIAL IS MAINTAINED STATIC WITHIN A ROASTING ZONE AND PREHEATED AIR EMPLOYED TO HEAT THE MASS OF PELLETIZED SELENIUM-CONTAINING MATERIALS IS PASSED DOWNWARDLY THROUGH SAID MASS OF PELLETIZED SELENIUMCONTAINING MATERIALS MAINTAINED AT A TEMPERATURE OF ABOUT 1350*F. FOR A PERIOD OF TIME IN THE RANGE ABOUT 1-6 HOURS SUFFICIENT TO VOLATILIZE SUBSTANTIALLY ALL OF THE SELENIUM FROM SAID PELLETIZED SELENIUM-CONTAINING MATERIALS AND THEREUPON DISCHARGING THE RESULTING SUBSTANTIALLY DESELENIZED PELLETIZED MATERIAL FROM SAID ROASTING ZONE.
Inventors
- 👤 Umeo Nakano
Bibliographic Details
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