PROCEDURE FOR OBTAINING SCORODITE WITH A HIGH ARSENIC CONTENT FROM ACIDIC SOLUTIONS WITH HIGH CONTENT OF SULFURIC ACID

A technical problem that has not been solved, is that today there is no procedure by which a final residue containing scorodite stabilized with a high arsenic content, higher than 15 % from highly acidic solutions greater than 30 g/L of free acidity or pH below 1.0. The present invention provides a solution to this problem through a process that allows: the oxidation of trivalent arsenic and ferrous ion, simultaneous with neutralization of the acid solution to be treated, the precipitation of arsenic and oxidized ferric iron added in a molar ratio Fe:As determined at a defined pH, all of the above with a high efficiency of precipitation of arsenic as ferric arsenate or scorodite, obtaining a final residue stable in the long term, characterized by their higher content of arsenic in a lower volume compared with the procedures described in the state of the prior art. 一个尚未解决的技术问题是，目前没有这样的方法：由大于30g/L的游离酸度或低于1.0的pH强酸性溶液生产含有稳定具有高砷含量(高于15％)的臭葱石的最终残留物。本发明通过提供一种方法了该问题的解决方案，该方法允许：三价砷和亚铁离子的氧化，同时中和待处理的酸溶液，在规定的pH下以确定的Fe:As