Poster (EARTH)

[PE1-031] The effects of oxygen and Te⁴⁺ on the leaching of tellurium

○Kyungnam Noh¹, Kyoungkeun Yoo¹ (1. Korea Maritime & Ocean University)

Keywords:TeCl4, aeration, hydrochloric acid, tellurium leaching

The leaching behavior of Te from tellurium powder in hydrochloric acid solution was investigated to establish the leaching process of Te. Four different leaching condition were compared; without the addition of oxygen (or air) and Te⁴⁺, with the introduction of oxygen (or air), with the addition of Te⁴⁺, with the addition of Te⁴⁺ and the introduction of oxygen (or air), the leaching efficiency of Te was the highest when air and Te⁴⁺ were added. In the leaching test of Te powder, which is used right after grinding, The leaching efficiency of Te increased with increasing TeCl₄ concentration, agitation speed, temperature, hydrochloric acid concentration. More than 99 % of Te leaching efficiency was observed in the hydrochloric acid leaching at 240 min with air introduction and adding 4000ppm of TeCl₄ under the leaching condition; 90 °C, 600 rpm, 2 % pulp density.