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1. WO2020221419 - METHOD FOR THE REMOVAL OF SILICON FROM SLAG

Publication Number WO/2020/221419
Publication Date 05.11.2020
International Application No. PCT/EP2019/060931
International Filing Date 29.04.2019
IPC
C01B 33/025 2006.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
33Silicon; Compounds thereof
02Silicon
021Preparation
023by reduction of silica or silica-containing material
025with carbon or a solid carbonaceous material, i.e. carbo-thermal process
C22B 7/04 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
7Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
04Working-up slag
CPC
C01B 33/025
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
33Silicon; Compounds thereof
02Silicon
021Preparation
023by reduction of silica or ; free; silica-containing material
025with carbon or a solid carbonaceous material, i.e. carbo-thermal process
C22B 7/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
7Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; ; Methods of a general interest or applied to the winning of more than two metals
04Working-up slag
Applicants
  • WACKER CHEMIE AG [DE]/[DE]
  • RHEINISCH-WESTFÄLISCHE TECHNISCHE HOCHSCHULE AACHEN (RWTH) [DE]/[DE]
Inventors
  • MOHSSENI, Javad
  • FRIEDRICH, Karl Bernd
  • PETERS, Lilian Roma Katharina
Agents
  • FRITZ, Helmut
  • BITTERLICH, Bianca
  • BUDCZINSKI, Angelika
  • DEFFNER-LEHNER, Maria
  • EGE, Markus
  • FRÄNKEL, Robert
  • MAI, Marit
  • MIESKES, Klaus
  • RIMBÖCK, Karl-Heinz
  • SCHUDERER, Michael
  • BELZ, Ferdinand
Priority Data
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUR ABTRENNUNG VON SILICIUM AUS SCHLACKE
(EN) METHOD FOR THE REMOVAL OF SILICON FROM SLAG
(FR) PROCÉDÉ DE SÉPARATION DE SILICIUM À PARTIR DE SCORIES
Abstract
(DE)
Gegenstand der Erfindung ist ein Verfahren zur Abtrennung von Silicium aus Schlacke, welche bei der Reduktion von Siliciumdioxid mit Kohlenstoff im Schmelz-Reduktionsofen anfällt, bei dem die flüssige Schlacke ruhen gelassen wird, wobei sich eine flüssige Siliciumphase abscheidet und die flüssige Siliciumphase an einer gekühlten Oberfläche zum Erstarren gebracht wird und das erstarrte Silicium von der gekühlten Oberfläche entfernt wird.
(EN)
The invention relates to a method for the removal of silicon from slag that is produced when silicon dioxide is reduced with carbon in a smelting furnace. According to the method, the liquid slag is allowed to rest and, as a result, a liquid silicon phase separates out. The liquid silicon phase is made to solidify on a chilled surface and the solidified silicon is removed from the chilled surface.
(FR)
L'invention concerne un procédé de séparation de silicium à partir de scories résultant de la réduction de dioxyde de silicium avec du carbone dans un four de fusion-réduction, consistant à laisser reposer les scories liquides, une phase de silicium liquide se déposant et la phase de silicium liquide étant amenée vers une surface refroidie en vue d'une solidification et le silicium solidifié étant éloigné de la surface refroidie.
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