METHOD FOR REMOVING ARSENIC FROM MATERIALS CONTAINING SAME

The invention relates to a method for removing arsenic from materials with a high arsenic and/or selenium content, comprising adding the material to a pressure reactor, adding an alkaline leaching solution, adding an oxidising gas, mixing the components in said reactor so as to produce a homogeneous pulp and subjecting said pulp to selective pressure leaching for the separation of arsenic. Said pulp is subjected to a first step of solid-liquid separation, producing an arsenic liquor and a solid with a low arsenic content. An Fe+3 and Ca+2 combination and Ce+3, Fe+3, Mg+2 precipitating agent isadded to said liquor. The arsenic precipitation product is subjected to a second step of solid-liquid separation. Optionally, the method also comprises subjecting the arsenic-free alkaline liquor toa step of crystallisation of the sodium sulfate, and subjecting the product of said crystallisation (Na2S04) to a third step of solid-liquid separation. 本发明涉及从高砷和/或硒含量的材料中除砷的方法，包括将该材料添加到压力反应罐，在所述反应罐中添加碱浸出溶液，添加氧化性气体，混合成分，用以得到均匀