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1. WO2020107122 - PROCESS FOR THE RECOVERY OF VALUE METALS FROM ZINC-BEARING ORES, CONCENTRATES, INTERMEDIATES AND WASTES

Publication Number WO/2020/107122
Publication Date 04.06.2020
International Application No. PCT/CA2019/051710
International Filing Date 29.11.2019
IPC
C22B 3/10 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
04by leaching
06in inorganic acid solutions
10Hydrochloric acid
B01D 11/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
11Solvent extraction
02of solids
C22B 19/20 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
19Obtaining zinc or zinc oxide
20Obtaining zinc otherwise than by distilling
C22B 19/28 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
19Obtaining zinc or zinc oxide
28from muffle furnace residues
C22B 3/22 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
20Treatment or purification of solutions, e.g. obtained by leaching
22by physical processes, e.g. by filtration, by magnetic means
C22B 3/44 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
20Treatment or purification of solutions, e.g. obtained by leaching
44by chemical processes
CPC
B01D 11/0288
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
11Solvent extraction
02of solids
0288Applications, solvents
B01D 9/0004
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
9Crystallisation
0004cooling by heat exchange
C22B 19/20
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
19Obtaining zinc or zinc oxide
20Obtaining zinc otherwise than by distilling
C22B 19/28
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
19Obtaining zinc or zinc oxide
28from muffle furnace residues
C22B 3/10
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
3Extraction of metal compounds from ores or concentrates by wet processes
04by leaching
06in inorganic acid solutions ; , e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
10Hydrochloric acid ; , other halogenated acids or salts thereof
C22B 3/22
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
3Extraction of metal compounds from ores or concentrates by wet processes
20Treatment or purification of solutions, e.g. obtained by leaching
22by physical processes, e.g. by filtration, by magnetic means, ; by thermal decomposition
Applicants
  • 9203-5468 QUEBEC INC. DBA NMR360 [CA]/[CA]
Inventors
  • HARRIS, Bryn
  • WHITE, Carl
Agents
  • CALVET, Damien
  • YELLE, Benoit
  • GOWLING WLG (CANADA) LLP
Priority Data
62/773,61030.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR THE RECOVERY OF VALUE METALS FROM ZINC-BEARING ORES, CONCENTRATES, INTERMEDIATES AND WASTES
(FR) PROCÉDÉ DE RÉCUPÉRATION DE MÉTAUX DE VALEUR À PARTIR DE MINERAIS, DE CONCENTRATS, D'INTERMÉDIAIRES ET DE DÉCHETS CONTENANT DU ZINC
Abstract
(EN)
A process for recovering zinc and associated value metals from zinc-bearing ores, concentrates and intermediates, especially from electric arc furnace dust (EAFD) and spent steel mill zinc pickle liquor (ZPL), comprising leaching the feed material in recycled, concentrated hydrochloric acid, recovering iron as a pure form of hematite, precipitating pure zinc hydroxide and drying said product to form pure zinc oxide, and recovering magnesia via pyrohydrolysis. Value metals such as silver, copper, lead and cadmium are also recovered as pure products. A particular embodiment is to combine EAFD with spent steel plant pickling liquors, and in particular with spent steel plant ZPL. The present invention provides a single process which permits the recovery of iron, zinc and any other metals in a form of economic value, and to generate within the process its own reagents for internal recycle.
(FR)
L'invention concerne un procédé de récupération de zinc et de métaux de valeur associés à partir de minerais, de concentrats et d'intermédiaires contenant du zinc, en particulier à partir de poussières de four à arc électrique (electric arc furnace dust - EAFD) et de liqueur usée de décapage à base de zinc (zinc pickle liquor - ZPL) provenant d'aciéries, comprenant la lixiviation du matériau d'alimentation dans de l'acide chlorhydrique concentré recyclé, la récupération du fer sous forme pure d'hématite, la précipitation d'hydroxyde de zinc pur et le séchage dudit produit pour former de l'oxyde de zinc pur et la récupération de magnésie par pyrohydrolyse. Des métaux de valeur tels que l'argent, le cuivre, le plomb et le cadmium sont également récupérés sous forme de produits purs. Un mode de réalisation particulier concerne la combinaison d'EAFD avec des liqueurs usées de décapage provenant d'usines sidérurgiques et en particulier avec des ZPL usées provenant d'usines sidérurgiques. La présente invention concerne un procédé unique qui permet la récupération de fer, de zinc et d'autres métaux sous une forme de valeur économique et la génération, au sein du procédé, de ses propres réactifs pour un recyclage interne.
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