Method and equipment for preparing high-purity tellurium from 4N high-selenium distilled tellurium

The invention discloses a method and equipment for preparing high-purity tellurium from 4N high-selenium distilled tellurium, and the method comprises the following steps: taking 4N high-selenium distilled tellurium as a raw material, and preparing 6N high-purity tellurium by seven steps of raw material preparation, gas replacement, hydrogen introduction distillation, directional solidification, purging and cooling, product discharge, and sampling and packaging. Aiming at the problems of high selenium (about 20ppm) and high sodium (about 10ppm) of 4N high-selenium distilled tellurium, the invention utilizes the structural characteristics of a horizontal furnace, realizes integration of three processes of atmospheric distillation, hydrogen-introduced selenium removal and directional solidification by improving the structure of a traditional condenser, and is novel in thought; wherein the condensation boat structure design is matched with the'secondary vaporization-condensation 'process to realize the'gas-gas'