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VERFAHREN ZUR HERSTELLUNG SYNTHETISCHER QUARZGLASKÖRNUNG
Producing synthetic quartz glass granules, comprises vitrifying pourable silicon dioxide granules made of porous granules that is obtained by granulating pyrogenically produced silicic acid, in a rotary kiln having a mullite-containing ceramic rotary tube, which is produced by applying a starting powder (103) comprising silicon dioxide and aluminum dioxide with a molar proportion of at least 70%, on a mold core (105) by thermal powder spraying method forming a mullite containing layer (108), and removing the mold core. Producing synthetic quartz glass granules, comprises vitrifying pourable silicon dioxide granules made of porous granules that is obtained by granulating pyrogenically produced silicic acid, in a rotary kiln having a mullite-containing ceramic rotary tube, which is produced by applying a starting powder (103) comprising silicon dioxide and aluminum dioxide with a molar proportion of at least 70%, on a mold core (105) by thermal powder spraying method forming a mullite containing layer (108), and removing the mold core. The ceramic rotary tube is flooded with a treating gas or rinsed with treating gas comprising helium and/or hydrogen (at least 30 vol.%).
VERFAHREN ZUR HERSTELLUNG SYNTHETISCHER QUARZGLASKÖRNUNG
Producing synthetic quartz glass granules, comprises vitrifying pourable silicon dioxide granules made of porous granules that is obtained by granulating pyrogenically produced silicic acid, in a rotary kiln having a mullite-containing ceramic rotary tube, which is produced by applying a starting powder (103) comprising silicon dioxide and aluminum dioxide with a molar proportion of at least 70%, on a mold core (105) by thermal powder spraying method forming a mullite containing layer (108), and removing the mold core. Producing synthetic quartz glass granules, comprises vitrifying pourable silicon dioxide granules made of porous granules that is obtained by granulating pyrogenically produced silicic acid, in a rotary kiln having a mullite-containing ceramic rotary tube, which is produced by applying a starting powder (103) comprising silicon dioxide and aluminum dioxide with a molar proportion of at least 70%, on a mold core (105) by thermal powder spraying method forming a mullite containing layer (108), and removing the mold core. The ceramic rotary tube is flooded with a treating gas or rinsed with treating gas comprising helium and/or hydrogen (at least 30 vol.%).
VERFAHREN ZUR HERSTELLUNG SYNTHETISCHER QUARZGLASKÖRNUNG
METHOD FOR PRODUCING A SYNTHETIC QUARTZ GLASS GRIT
PROCÉDÉ DE PRODUCTION DE GRAINS DE VERRE DE QUARTZ SYNTHÉTIQUE
LEHMANN WALTER (author) / HOFMANN ACHIM (author) / KAYSER THOMAS (author) / ARNDT MARTIN (author)
2016-08-10
Patent
Electronic Resource
German
IPC:
C03B
Herstellung oder Formgebung von Glas, Mineral- oder Schlackenwolle
,
MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
/
C04B
Kalk
,
LIME
/
C23C
Beschichten metallischer Werkstoffe
,
COATING METALLIC MATERIAL
/
F27B
Industrieöfen, Schachtöfen, Brennöfen, Retorten allgemein
,
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
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