Cascade recovery method for arsenic-containing antimony-containing gold ore difficult to process

• Main Authors: JIN RANGONG, HUANG HAIHUI, WANG YUN, SUN LIUGEN, CHANG YAOCHAO
• Format: Patent
• Language: English
• Published: 18.11.2015
• Subjects: APPARATUS THEREFOR; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; 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; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; 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 provides a cascade recovery method for arsenic-containing antimony-containing gold ore difficult to process, and relates to a method for separating and extracting antimony, arsenic and gold of the gold ore difficult to process. The method is characterized in that the recovery process includes the steps that (1) sodium sulphide is added under the alkaline condition, and antimony leaching is carried out; (2) electrodeposition is conducted on leaching liquid to obtain cathode antimony liquid; (3) leaching residues are washed, and concentrated sulfuric acid is added into the washed liquid for antimony deposition; (4) the leaching residues are roasted for arsenic removal and desulfuration, so that pozzuolite enters smoke, the smoke is chilled and crystallized to recover arsenic trioxide, and acid making with smoke is achieved after arsenic recovery; and (5) gold and silver in the roasted residues are separated after antimony, arsenic and sulphur are extracted. The method is special for the arsenic-containing antimony-containing gold ore difficult to process, the influences of arsenic and antimony on the recovery rate of noble metal are effectively eliminated, the problem that arsenic and antimony are difficult to separate is solved through selective leaching, valuable elements such as antimony, arsenic and sulphur are comprehensively recycled, and the recovery rate of gold and silver is also increased. According to the technology, raw material adaptability is high, the technology process is short, and energy consumption is low.