JPS57111224A - Preparation of molten silica and apparatus therefor - Google Patents
Preparation of molten silica and apparatus thereforInfo
- Publication number
- JPS57111224A JPS57111224A JP18560780A JP18560780A JPS57111224A JP S57111224 A JPS57111224 A JP S57111224A JP 18560780 A JP18560780 A JP 18560780A JP 18560780 A JP18560780 A JP 18560780A JP S57111224 A JPS57111224 A JP S57111224A
- Authority
- JP
- Japan
- Prior art keywords
- quartz
- raw material
- furnace
- fed
- preheated
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Landscapes
- Silicon Compounds (AREA)
Abstract
PURPOSE: To reduce the fuel cost, improve the productivity and prepare molten silica, by changing the α-quartz in a raw material, e.g. quartzite, fed from the top of a vertical preheating furnace into the β-quartz, and dropping the β- quartz to a melting furnace linked to the bottom of the preheating furnace by the own weight.
CONSTITUTION: Quartzite or silica sand which is a raw material having a grain diameter ≤50mm is fed from a raw material tank 11 through a feed inlet 2 onto a barrier plate 5 in a preheating furnace 3. A liquid or gaseous fuel and air are fed from a nozzle 6 provided on the top of the furnace 3 and burned to operate the furnace 3 at an internal temperature above the transition temperature of the α-quartz, i.e. the temperature to become the β-quartz. The raw material is preheated at the high temperature to change the α-quartz into the β-quartz at the transition temperature of 523°C or above of the α-quartz, and the structure is broken due to the reduction in density in the transition from the α-quartz to the β-quartz, and the dusting is promoted. The β-quartz is pushed to a connecting pipe 8 by a pushing means 7 to feed the preheated raw material in a fully preheated state directly to a melting part 9.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18560780A JPS6015567B2 (en) | 1980-12-26 | 1980-12-26 | Fused silica production method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18560780A JPS6015567B2 (en) | 1980-12-26 | 1980-12-26 | Fused silica production method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57111224A true JPS57111224A (en) | 1982-07-10 |
| JPS6015567B2 JPS6015567B2 (en) | 1985-04-20 |
Family
ID=16173754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18560780A Expired JPS6015567B2 (en) | 1980-12-26 | 1980-12-26 | Fused silica production method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6015567B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1006087A1 (en) * | 1998-12-03 | 2000-06-07 | Heraeus Quarzglas GmbH & Co. KG | Method for purifying SiO2 granules and apparatus for carrying out the process |
-
1980
- 1980-12-26 JP JP18560780A patent/JPS6015567B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1006087A1 (en) * | 1998-12-03 | 2000-06-07 | Heraeus Quarzglas GmbH & Co. KG | Method for purifying SiO2 granules and apparatus for carrying out the process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6015567B2 (en) | 1985-04-20 |
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