EP 2451753 A1 20120516 - METHOD FOR PRODUCING A HIGHLY PURE QUARTZ GRANULATE
Title (en)
METHOD FOR PRODUCING A HIGHLY PURE QUARTZ GRANULATE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES HOCHREINEN QUARZ-GRANULATES
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN GRANULAT DE QUARTZ DE GRANDE PURETÉ
Publication
Application
Priority
- EP 2010059215 W 20100629
- DE 102009032297 A 20090709
Abstract (en)
[origin: WO2011003777A1] The invention relates to a method for producing a highly pure quartz granulate. The aim of the invention is to provide a method by means of which a highly pure quartz granulate can be produced from a natural quartz raw material. According to the invention, this aim is achieved by a method in which the following process steps are performed: - washing a natural quartz raw material in the form of coarsely crushed pieces, - mechanical comminution of the pre-crushed pieces, - further comminution of the pieces to a grain size of less than 0.5 mm by means of high-voltage discharge pulses, - flotation for separating out foreign minerals, and – chemical treatment for further depletion of foreign elements.
IPC 8 full level
C03B 20/00 (2006.01); C03C 1/02 (2006.01); C03C 3/06 (2006.01)
CPC (source: EP US)
C03C 1/022 (2013.01 - EP US); C03C 3/06 (2013.01 - EP US); C03C 2201/02 (2013.01 - EP US)
Citation (search report)
See references of WO 2011003777A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
DE 102009032297 A1 20110113; EP 2451753 A1 20120516; US 2012103017 A1 20120503; WO 2011003777 A1 20110113
DOCDB simple family (application)
DE 102009032297 A 20090709; EP 10730423 A 20100629; EP 2010059215 W 20100629; US 201213346095 A 20120109