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    METHOD FOR EXTRACTING BASE AND PRECIOUS METALS BY A PRE- TREATMENT THAT LEADS TO SOLUBILISATION OF THE REFRACTORY MATRICES THEREOF
    3.
    发明申请
    METHOD FOR EXTRACTING BASE AND PRECIOUS METALS BY A PRE- TREATMENT THAT LEADS TO SOLUBILISATION OF THE REFRACTORY MATRICES THEREOF 审中-公开

    公开(公告)号：US20200224291A1

    公开(公告)日：2020-07-16

    申请号：US16628966

    申请日：2018-09-05

    Applicant: Eduardo Luis Patino Martinez

    Inventor： Eduardo Luis Patino Martinez

    IPC: C22B11/08 ,  C22B3/08 ,  C22B11/06

    Abstract: The present invention relates to a method for extracting base and precious metals, all contained in refractory minerals, using aqueous media. The aim is to replace the current “flotation/smelting”-method for extracting minerals in Chilean and global mining or classical leaching with a method comprising a simple and robust pre-treatment that leads to solubilisation of the refractory matrices thereof. The method consists of mixing the mineral (Cu2S, CuS,CuFeS2, Cu5FeS4, FeS2, FeAsS.NiS, (Ni,Fe)xSy), ground to an appropriate size (2.5 centimetres), with a specific dose of solid reagent in a rotary agglomeration drum and then adding slightly acidified water to obtain a defined water content (5-8%) depending on the type of gangue contained in the metal-containing solid, thereby forming an agglomerate that will form a heap, which is subsequently allowed to stand for a period of several days (20-60 days), during which the conditions required to transform the refractory matrix into a highly soluble solid will be generated. Finally, appropriately regulated irrigation is applied, thus resulting in extraction of the metal by simple aqueous washing. In essence, the method achieves maximum transformation of the original refractory mineral into a highly soluble solid salt during a step prior to the conventional leaching process. Thus, the metal will be contained in a solid with a much higher solubility than the original matrix, therefore the dissolution thereof will be faster, more efficient and require a minimal use of consumables and reagents.

    METHOD AND A SYSTEM FOR GOLD RECOVERY FROM HALOGEN EXTRACTION TREATMENT
    4.
    发明申请
    METHOD AND A SYSTEM FOR GOLD RECOVERY FROM HALOGEN EXTRACTION TREATMENT 审中-公开

    公开(公告)号：US20200172993A1

    公开(公告)日：2020-06-04

    申请号：US16208745

    申请日：2018-12-04

    Applicant: DUNDEE SUSTAINABLE TECHNOLOGIES INC.

    Inventor： BERTRAND DUBREUIL ,  JEAN-MARC LALANCETTE ,  DAVID LEMIEUX

    IPC: C22B3/00 ,  C22B11/06

    Abstract: A method and a system for gold and silver recovery from a pregnant solution resulting from gold extraction from an ore using halogen, the method comprising lowering the oxidation reduction potential of the pregnant solution by mixing the pregnant solution with a reducer over the surface of a bed of silica, and flowing the mixture through the bed of silica. The system comprises a bed of silica, a feeder controlling feeding of the pregnant solution with a reducer to direct a mixture of an ORP less than 550 mV to the surface of the bed of silica, and a collector receiving a barren solution from the bed of silica after flowing of the mixture therethrough.

    Method for platinum group metals recovery from spent catalysts
    5.
    发明授权
    Method for platinum group metals recovery from spent catalysts 有权

    公开(公告)号：US10457999B2

    公开(公告)日：2019-10-29

    申请号：US15318459

    申请日：2015-06-18

    Applicant: YEDA RESEARCH AND DEVELOPMENT CO. LTD.

    Inventor： Igor Lubomirsky ,  Valery Kaplan

    IPC: C22B3/00 ,  B01J19/08 ,  C01G55/00 ,  C22B11/06

    Abstract: A method for recovery of platinum group metals from a spent catalyst is described. The method includes crushing the spent catalyst to obtain a catalyst particulate material including particles having a predetermined grain size. The method includes subjecting the catalyst particulate material to a chlorinating treatment in the reaction zone at a predetermined temperature for a predetermined time period by putting the catalyst particulate material in contact with the chlorine containing gas. The method also includes applying an electromagnetic field to the chlorine-containing gas in the reaction zone to provide ionization of chlorine; thereby to cause a chemical reaction between platinum group metals and chlorine ions and provide a volatile platinum group metal-containing chloride product in the reaction zone. Following this, the volatile platinum group metal-containing chloride product is cooled to convert the product into solid phase platinum group metal-containing materials.

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