Method for extracting gold from arsenic-containing mineral through sulfur-controlled roasting

Method for extracting gold from arsenic-containing mineral through sulfur-controlled roasting

The invention belongs to the technical field of wet smelting, and particularly relates to a sulfur-controlled roasting gold extraction method for arsenic-containing minerals, which comprises the following steps: S1, introducing air, and roasting arsenic-containing gold minerals at 600-680 DEG C for...

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Hauptverfasser: HE XINGMIN, LIU ZILIANG, WANG HENGHUI, TONG YIZHE
Format: Patent
Sprache:chi ; eng
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CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator HE XINGMIN
LIU ZILIANG
WANG HENGHUI
TONG YIZHE
description The invention belongs to the technical field of wet smelting, and particularly relates to a sulfur-controlled roasting gold extraction method for arsenic-containing minerals, which comprises the following steps: S1, introducing air, and roasting arsenic-containing gold minerals at 600-680 DEG C for 0.5-2 hours to obtain roasted slag; s2, the roasting slag is finely ground, and oxygen pressure leaching is conducted in a neutral medium; the liquid-solid ratio is (2-5): 1; s3, an alkali solution is added into the leaching residues to adjust the pH to be 10-11, cyanide is added, stirring is conducted for 30-40 h, and a cyanide solution is obtained through filtering; and feeding the cyanide solution to a gold extraction process. According to the method, sulfur-controlled roasting is combined with oxygen pressure self-thermal decomposition pretreatment, additional heat compensation or continuous cooling is not needed to maintain the reaction temperature to be constant in a proper temperature range, meanwhile, effic
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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title Method for extracting gold from arsenic-containing mineral through sulfur-controlled roasting
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