JP2011093740A - ガラス欠点発生源特定方法、溶融鋳造耐火物及びそれを用いたガラス溶融窯 - Google Patents
ガラス欠点発生源特定方法、溶融鋳造耐火物及びそれを用いたガラス溶融窯 Download PDFInfo
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Abstract
【解決手段】Cs2 O、SrO、BaO及びZnOから選ばれる少なくとも1種のトレーサ成分を含有した溶融鋳造耐火物を内張り炉材に用いてガラス溶融窯を構築する工程と、ガラス溶融窯によりガラス材料を溶融し、溶融されたガラス材料を、成型し、ガラス製品を製造する工程と、ガラス製品のうちガラス欠点を有するものを抽出し、成分組成を分析してガラス溶融窯のガラス欠点発生源の位置を求める工程と、を有するガラス欠点発生源特定方法。
【選択図】なし
Description
表1に示した配合となるように各成分の粉末原料を均質に混合し、これをアーク電気炉により溶融させて、溶融した原料を黒鉛型に流し込み、冷却してジルコニア含有量32%クラスのAZS電鋳煉瓦を得た。これはトレーサ成分として、Cs2 Oを0.43%含有するものである。
得られた電鋳煉瓦から10mm×20mm×120mmの直方体の試料を切りだし、板ガラスを溶解した1500℃の白金坩堝中に72時間つるして侵食試験を行い、そのときの電鋳煉瓦の侵食量を測定するとともに、煉瓦近傍のガラス中のCs2 O含有量を調べた。また、これとは別に、得られた電鋳煉瓦から30mm(直径)×30mm(高さ)の試料を切出し、これを電気炉で1500℃、16時間加熱後のガラス滲出量を求めた。その結果を表1に示した。
トレーサ成分として、Cs2 Oの代わりにSrOを0.48%含有するものとした以外は、実施例1と同様に電鋳煉瓦を鋳造し、ガラスによる侵食量、SrO含有量及びガラス滲出量を調べた。その結果を表1に示した。
トレーサ成分として、Cs2 O含有量が2.1%のものを実施例1と同様の操作で鋳造した。実施例1と同様に、ガラスによる侵食量、SrO含有量及びガラス滲出量を調べ、その結果を表1に示した。
トレーサ成分として、同時にCs2 O、SrOを含有しない通常のAZS電鋳煉瓦(比較例1)、Cs2 O含有量が0.19%のもの(比較例2)を実施例1と同様の操作で鋳造した。実施例1と同様に、ガラスによる侵食量、SrO含有量及びガラス滲出量を調べ、その結果を表1に示した。
耐食性は、10mm×20mm×120mmの直方体形状の試料を鋳塊より切出し、白金坩堝中に吊るしてカンタルスーパー炉中で1500℃、48時間、ガラス材料に浸漬した後の侵食量を測定して求めた。ここで用いたガラス材料は、SiO2 72.5%、Al2 O3 2.0%、MgO 4.0%、CaO 8.0%、Na2 O 12.5%、K2 O 0.8%の組成からなるものである。
*侵食試験後の煉瓦近傍ガラス中のトレーサ成分含有量:
上記侵食試験において、ガラス中に浸漬された試料の表層から0.5〜1mm離れた部分のガラスの成分を電子顕微鏡(SEM−EDX)を用いて、測定した。
*ガラス滲出量:直径30mm、高さ30mmの円柱の試料をダイヤモンドコアドリルで切出し、アルキメデス法にて乾燥質量(W1)、水中質量(W2)を測定する。この試料を電気炉にて1500℃で16時間保持した後、炉外に取り出し、炉外で自然放冷する。この試料を再度、アルキメデス法にて乾燥質量(W3)、水中質量(W4)を測定する。このようにして得られた測定値を使い、次式(1)により算出した。
ガラス滲出量=〔(W3−W4)/(W1−W2)−1〕×100% …(1)
一方、比較例2はCs2 O含有量が0.19%であるが、侵食試験後の炉材近傍のガラス中にCs2Oは検出されなかった。
Claims (9)
- Cs2 O、SrO、BaO及びZnOから選ばれる少なくとも1種のトレーサ成分を含有した溶融鋳造耐火物を内張り炉材に用いてガラス溶融窯を構築する工程と、
前記ガラス溶融窯によりガラス材料を溶融し、溶融されたガラス材料を、成型しガラス製品を製造する工程と、
前記ガラス製品のうちガラス欠点を有するものを抽出し、成分組成を分析して前記ガラス溶融窯のガラス欠点発生源の位置を求める工程と、
を有することを特徴とするガラス欠点発生源特定方法。 - 前記溶融鋳造耐火物が、アルミナ・ジルコニア・シリカ質溶融鋳造耐火物、アルミナ質溶融鋳造耐火物及びジルコニア質溶融鋳造耐火物から選ばれる少なくとも1種の溶融鋳造耐火物であることを特徴とする請求項1記載のガラス欠点発生源特定方法。
- 前記溶融鋳造耐火物中に含まれるトレーサ成分が、前記溶融されるガラス材料に含まれていないことを特徴とする請求項1又は2記載のガラス欠点発生源特定方法。
- 前記ガラス溶融窯の構成箇所をブロック単位に分け、そのブロック単位ごとに前記トレーサ成分として異なる成分を含有する溶融鋳造耐火物を用いることを特徴とする請求項1乃至3のいずれか1項記載のガラス欠点発生源特定方法。
- 化学組成が質量%で、Al2 O3 を45〜70%、ZrO2 を14〜45%、SiO2 を9〜15%含み、Na2 O、K2 O、Cs2 O及びSrOの合計量が2%以下であって、かつ、Cs2 O及びSrOから選ばれる少なくとも1種のトレーサ成分を0.2〜2%含有することを特徴とするガラス溶融窯の内張り炉材用アルミナ・ジルコニア・シリカ質溶融鋳造耐火物。
- 化学組成が質量%で、Al2 O3 を94〜98%、SiO2 を0.1〜1.0%含み、Na2 O、K2 O、Cs2 O、SrO、BaO及びZnOの合計量が5%以下であって、かつ、Cs2 O、SrO、BaO及びZnOから選ばれる少なくとも1種のトレーサ成分を0.2〜5%含有することを特徴とするガラス溶融窯の内張り炉材用アルミナ質溶融鋳造耐火物。
- 化学組成が質量%で、ZrO2 を88〜97%、SiO2 を2.4〜10.0%、Al2 O3 を0.4〜3%含み、Na2 O、K2 O及びCs2 Oの合計量が1%以下であって、かつ、Cs2 Oのトレーサ成分を0.2〜0.5%含有することを特徴とするガラス溶融窯の内張り炉材用ジルコニア質溶融鋳造耐火物。
- 請求項5乃至7のいずれか1項記載の溶融鋳造耐火物を内張り炉材として用いたことを特徴とするガラス溶融窯。
- 前記ガラス溶融窯を、その構成箇所により任意のブロック単位に分け、そのブロック単位ごとに異なるトレーサ成分を含有する請求項5乃至7のいずれか1項記載の溶融鋳造耐火物を用いることを特徴とするガラス溶融窯。
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US13/505,206 US20120216566A1 (en) | 2009-10-29 | 2010-10-21 | Method for identifying glass defect source, fusion cast refractory and glass melting furnace using it |
PCT/EP2010/065898 WO2011051162A1 (en) | 2009-10-29 | 2010-10-21 | Method for identifying glass defect source, fusion cast refractory and glass melting furnace using it |
EP10768492A EP2493821A1 (en) | 2009-10-29 | 2010-10-21 | Method for identifying glass defect source, fusion cast refractory and glass melting furnace using it |
BR112012010245A BR112012010245A2 (pt) | 2009-10-29 | 2010-10-21 | método de identificação de uma fonte de defeito de vidro, refratário moldado para fusão e forno de fusão de vidro utilizando o mesmo |
EA201290235A EA021752B1 (ru) | 2009-10-29 | 2010-10-21 | Способ идентификации источника дефекта стекла, ассоциированного с коррозией огнеупора |
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WO2017115698A1 (ja) * | 2015-12-28 | 2017-07-06 | 旭硝子株式会社 | アルミナ・ジルコニア・シリカ質耐火物、ガラス溶融窯、およびガラス板の製造方法 |
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US20120216566A1 (en) | 2012-08-30 |
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