Fremgangsmåte for opparbeidelse av jarosittholdige rester

摘要

To work up jarosite-containing residues to give usable products, the jarosite-containing residues and zinc sulphide-containing concentrates are stirred in dilute sulphuric acid having a content of 40 to 100 g/l of free sulphuric acid in an autoclave at an oxygen partial pressure of at least 1000 kPa and a temperature of 130 to 170 DEG C, the iron and zinc content of the residue and of the zinc sulphide-containing concentrate are substantially brought into solution, separation into solution and solid is effected after the pressure has been let down, the solution is passed into the bleaching circulation of a zinc electrolysis with precipitation of the iron in the form of haematite, the elemental sulphur is separated off from the solid and the residue is transported for further use.