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1. WO2020132751 - METHOD FOR OBTAINING ANTIMONY TRIOXIDE (SB2O3), ARSENIC TRIOXIDE (AS2O3) AND LEAD (PB)

Publication Number WO/2020/132751
Publication Date 02.07.2020
International Application No. PCT/CL2018/000044
International Filing Date 27.12.2018
IPC
C22B 1/04 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
1Preliminary treatment of ores or scrap
02Roasting processes
04Blast roasting
C22B 5/02 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
5General processes of reducing to metals
02Dry processes
C22B 5/08 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
5General processes of reducing to metals
02Dry processes
08by sulfides; Roasting reaction processes
C22B 5/16 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
5General processes of reducing to metals
02Dry processes
16with volatilisation or condensation of the metal being produced
C22B 13/02 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
13Obtaining lead
02by dry processes
C22B 30/02 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
30Obtaining antimony, arsenic or bismuth
02Obtaining antimony
CPC
C22B 1/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
1Preliminary treatment of ores or scrap
02Roasting processes
04Blast roasting
C22B 13/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
13Obtaining lead
02by dry processes
C22B 30/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
30Obtaining antimony, arsenic or bismuth
02Obtaining antimony
C22B 30/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
30Obtaining antimony, arsenic or bismuth
04Obtaining arsenic
C22B 5/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
5General methods of reducing to metals
02Dry methods ; smelting of sulfides or formation of mattes
C22B 5/08
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
5General methods of reducing to metals
02Dry methods ; smelting of sulfides or formation of mattes
08by sulfides; Roasting reaction methods
Applicants
  • COMPAÑIA MINERA PARGO MINERALS SPA [CL]/[CL]
Inventors
  • BUCHI GATICA, Julio Domingo
Agents
  • PALMA OYEDO, Jaime Dagoberto
Priority Data
Publication Language Spanish (ES)
Filing Language Spanish (ES)
Designated States
Title
(EN) METHOD FOR OBTAINING ANTIMONY TRIOXIDE (SB2O3), ARSENIC TRIOXIDE (AS2O3) AND LEAD (PB)
(ES) PROCESO DE OBTENCIÓN TRIÓXIDO DE ANTIMONIO (SB203), TRIÓXIDO DE ARSÉNICO (AS203) Y PLOMO (PB)
(FR) PROCÉDÉ D'OBTENTION DE TRIOXYDE D'ANTIMOINE (SB203), DE TRIOXYDE D'ARSÉNIC (AS203) ET DE PLOMB (PB)
Abstract
(EN)
The present application relates to a method for obtaining antimony trioxide (Sb2O3), arsenic trioxide (As2O3) and metal lead (Pb) from a mineral containing predominantly antimonite. The first step begins with a process of oxidative roasting of the sulfide mineral in rotary ovens, at a controlled temperature close to 500°C, to oxidise antimony trioxide and arsenic trioxide and consequently volatilise same. In this step of the method, the air is regulated to ensure the adequate oxidation of antimony and arsenic until the trioxides thereof are formed, preventing the formation of cervantite (Sb2O4). The second step of the method is carried out in a fixed oven, to cause the volatilisation of the products of interest, antimony trioxide and the arsenic trioxide, which separate according to their different condensation temperatures. The temperature of the gases reduces from 450°C to 350°C, separating the antimony trioxide while the arsenic trioxide remains volatile and subsequently solidifies at a gas temperature of 300°C to 90°C. Given the condition that lead oxide does not volatilise at the temperature of the initial process, this compound remains solid inside the oven, being recovered as liquid lead, following reduction with carbon.
(ES)
La presente solicitud se refiere a un procedimiento de Obtención de Trióxido de Antimonio (Sb2O3), Trióxido de Arsénico (As2O3) y Plomo (Pb) metálico a partir de un mineral, predominante en Antimonita La primera etapa, se inicia con un proceso de Tostación Oxidante en hornos rotatorios, a temperatura controlada cercanas a los 500°C del mineral sulfurado, con el objeto de llevar a cabo la oxidación a trióxidos del.Antimonio y Arsénico y en consecuencia su volatilización. El aire, en esta etapa del proceso, se regula para asegurar la adecuada oxidación de Antimonio y Arsénico hasta la formación de sus trióxidos, evitando la formación de Cervantina (Sb2O4). La segunda etapa del proceso se lleva a efecto en un horno fijo, con el fin de generar la volatilización de los productos de interés, trióxido de Antimonio y trióxido de Arsénico que se separarán conforme a sus diferentes temperaturas de condensación. La temperatura de los gases disminuye de 450 a 350°C separando el trióxido de antimonio, en cambio el trióxido de Arsénico se mantiene volátil solidificándose posteriormente a la temperatura de gases de 300a a 90°C. Dada la condición de que el óxido de Plomo no volatiliza a la temperatura de proceso inicial, este compuesto se mantendrá sólido al interior del horno, recuperándose como Plomo líquido, después de una reducción con carbón.
(FR)
La présente invention concerne un procédé d'obtention de trioxyde d'antimoine (Sb2O3), de trioxyde d'arsénic (As2O3) et de plomb (Pb) métalliques à partir d'un minéral, principalement constitué d'antimonite. La première étape débute par un procédé de grillage oxydant dans des fours rotatifs, à température contrôlée proche des 500°C du minéral soufré, afin de mettre en oeuvre l'oxydation en trioxydes de l'antimoine et de l'arsénic et par conséquent leur volatilisation. L'air, lors de cette étape du procédé, est régulé pour assurer l'oxydation appropriée d'antimoine et d'arsénic jusqu'à la formation de leurs trioxydes, en évitant la formation de cervantite (Sb2O4). La seconde étape du procédé est mise en oeuvre dans un four fixe, afin de générer la volatilisation des produits d'intérêt, le trioxyde d'antimoine et le trioxyde d'arsénic qui sont séparés suivant leurs différentes températures de condensation. La température des gaz diminue de 450 à 350°C, séparant le trioxyde d'antimoine, en revanche le trioxyde d'arsénic reste volatil, se solidifiant ultérieurement à la température de gaz de 300 à 90°C. Etant donnée la condition voulant que l'oxyde de plomb ne se volatilise pas à la température de traitement initial, ce composé est maintenu solide à l'intérieur du four, et il est récupéré comme plomb liquide, après une réduction au charbon.
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