Novel Technology for Preparation of Crude Selenium from Se-Rich Stone Coal
Tian Huan
Shuai Qin
Xu Shengrui
Bao Zhengyu
Xie Shuyun
Abstract：A new effective recovery method of crude Se by Na2 SO3 is presented from high efficient calcium-adsorbent used for combustion of Se-rich stone coal,which was collected from Yutangba,Enshi,Hubei Province.The reduction of Se reaches 98.48±1.95% (n=3)in the simulation process and the optimium parameters are determined as follows:terperature 353 K, time 15 mins,HCl concentration 4 mol·L-1 and mass ratio between Na2 SO3 to Se of 6∶1.An acceptable recovery rate of se-lenium was also obtained from the actual experiment using Se-rich stone coal.The XRD and SEM-EDS analysis results show that the crystal system and purity of Se are controlled by many factors in the reaction system.
Keywords：Se-rich stone coalselemiumNa2 SO3reductionrecoverygeochemistry
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 880-888 )