Method for wet separation and recovery of valuable metal from Kaldo furnace smelting slag

• Main Authors: JI HONGAN, HUANG JIANFEN, WANG JUNHUI, WANG YILIN, LI WEI, WANG YONGBIN
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; 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 wet separation and recovery of valuable metal from Kaldo furnace smelting slag. Kaldo furnace smelting slag is ground and dipped in water to remove soluble salt; copper, selenium and tellurium in the slag are leached out by using pressurization, oxidation and acid leaching for treatment to obtain copper sulfate solution, silver-selenium slag and copper telluride slag; tellurium, silver and selenium can be respectively recovered from the silver-selenium slag and the copper telluride slag; pressurized copper removing filter residue is mixed with hydrochloric acid for leaching out antimony and bismuth to finally obtain lead-silver slag capable of returning to a Kaldo furnace for smelting; and antimony and bismuth are further recovered from antimony-bismuth solution. According to the method, a mode of stepped removal and recovery of such metal as copper, antimony, bismuth, selenium, tellurium, silver and lead enriched in the Kaldo furnace smelting slag is adopted, compatibilit