Hot-pressing oxidation pretreatment method for arsenic-containing gold concentrates

The invention discloses a hot-pressing oxidation pretreatment method for arsenic-containing gold concentrates. The method comprises the following steps that (1) the arsenic-containing gold concentrates are prepared into acidized ore pulp; (2) after CuSO4 is added to the acidized ore pulp, the acidized ore pulp and the CuSO4 are subjected to hot-pressing pre-oxidation to obtain oxidized ore pulp; (3) the oxidized ore pulp is subjected to thickening washing to obtain underflow oxidizing slag and overflow acid liquor; (4) the underflow oxidizing slag is subjected to alkali quantity adjustment and cyaniding; (5) the overflow acid liquor is subjected to iron precipitation through a goethite process, and part of sulfate radicals are removed; (6) a material obtained in the step (5) is subjected to thickening to obtain underflow and overflow liquid; (7) the overflow liquid is returned to the step (1) to participate in acidizing treatment; (8) seed crystals in part of the underflow obtained in the step (6) are returne