Method for leaching gold and silver out of kustelite wrapped by manganese under normal pressure and temperature

• Main Authors: SONG BAOXU, WANG CHENGXING, TANG YUHE, QIU XIANYANG, HU ZHEN, HU FUMING, LI HANWEN, WU LUQING, WANG TAI, ZOU JIANJIAN
• Format: Patent
• Language: Chinese; English
• Published: 20.07.2016
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for leaching gold and silver out of kustelite wrapped by manganese under normal pressure and temperature. The method includes the steps that raw ore grinding is performed; pretreatment is performed through sulfuric acid and reduced iron powder; filtering is carried out; and manganese-leaching slag obtained through filtering is subjected to cyanide leaching to obtain the gold and silver. Compared with existing methods for leaching the gold and silver out of the kustelite wrapped by the manganese, the method achieves pretreatment of the kustelite wrapped by the manganese under low acid concentration and normal pressure and temperature, the gold and silver leaching rate is substantially increased, and the method is applicable to the kustelite wrapped by the manganese. 本发明公开了种常温常压下从被锰包裹金银矿中浸出金银的方法，包括磨矿、采用硫酸和还原铁粉预处理、过滤和将过滤得到的浸锰渣氰化浸出金银等步骤。与现有的从被锰包裹金银矿中浸出金银的方法相比，本发明实现了低酸浓度下常温常压预处理被锰包裹金银矿，金银浸出率大幅度提高，适用于被锰包裹的金银矿。