WO2015089521A3 - Process and equipment for the melting of silicon fines - Google Patents

Process and equipment for the melting of silicon fines Download PDF

Info

Publication number
WO2015089521A3
WO2015089521A3 PCT/ZA2014/000067 ZA2014000067W WO2015089521A3 WO 2015089521 A3 WO2015089521 A3 WO 2015089521A3 ZA 2014000067 W ZA2014000067 W ZA 2014000067W WO 2015089521 A3 WO2015089521 A3 WO 2015089521A3
Authority
WO
WIPO (PCT)
Prior art keywords
melting
fines
silicon
furnace
lance
Prior art date
Application number
PCT/ZA2014/000067
Other languages
French (fr)
Other versions
WO2015089521A2 (en
Inventor
Jean-Claude CHALOUETTE
Eric FAUJOUR
Original Assignee
Silicon Smelters (Pty) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Silicon Smelters (Pty) Limited filed Critical Silicon Smelters (Pty) Limited
Publication of WO2015089521A2 publication Critical patent/WO2015089521A2/en
Publication of WO2015089521A3 publication Critical patent/WO2015089521A3/en
Priority to ZA2016/04528A priority Critical patent/ZA201604528B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/02—Silicon
    • C01B33/037—Purification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/18—Charging particulate material using a fluid carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Silicon Compounds (AREA)

Abstract

The invention relates to a process- and a complementing furnace for the melting of silicon based fines. The process comprises of the steps of feeding silicon based lines into a direct current electric arc furnace, melting the fines with a direct current arc Into a liquid bath, and tapping the resultant liquid silicon product from the furnace, once the required melting was accomplished- The melting is conducted in a nitrogen atmosphere, with the nitrogen gas being introduced Into the molten silicon by means of a lance. The fines are fed pneumatically with the nitrogen gas, as transport medium, via the lance Into the molten silicon. The fines are of a minus 15 mm size fraction.
PCT/ZA2014/000067 2013-12-04 2014-12-04 Process and equipment for the melting of silicon fines WO2015089521A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2016/04528A ZA201604528B (en) 2013-12-04 2016-07-04 Process and equipment for the melting of silicon fines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2013/09084 2013-12-04
ZA201309084 2013-12-04

Publications (2)

Publication Number Publication Date
WO2015089521A2 WO2015089521A2 (en) 2015-06-18
WO2015089521A3 true WO2015089521A3 (en) 2015-09-17

Family

ID=53189237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2014/000067 WO2015089521A2 (en) 2013-12-04 2014-12-04 Process and equipment for the melting of silicon fines

Country Status (2)

Country Link
WO (1) WO2015089521A2 (en)
ZA (1) ZA201604528B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012109459A1 (en) * 2011-02-09 2012-08-16 Hariharan Alleppey V Recovery of silicon value from kerf silicon waste
JP2012171858A (en) * 2011-02-24 2012-09-10 Kinoshita Seisakusho:Kk Method for melting recovered silicon waste
EP2546195A1 (en) * 2010-03-11 2013-01-16 Mitsubishi Chemical Corporation Method for recovering silicon and method for producing silicon

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2546195A1 (en) * 2010-03-11 2013-01-16 Mitsubishi Chemical Corporation Method for recovering silicon and method for producing silicon
WO2012109459A1 (en) * 2011-02-09 2012-08-16 Hariharan Alleppey V Recovery of silicon value from kerf silicon waste
JP2012171858A (en) * 2011-02-24 2012-09-10 Kinoshita Seisakusho:Kk Method for melting recovered silicon waste

Also Published As

Publication number Publication date
ZA201604528B (en) 2018-03-28
WO2015089521A2 (en) 2015-06-18

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