INORGANIC COATED SAND AND METHOD FOR PRODUCING THE SAME, AND METHOD FOR IMPROVING STORAGE STABILITY OF INORGANIC COATED SAND
To provide inorganic coated sand that is made using reconditioned sand or refractory aggregate with a high degree of amorphousness and exhibits improved storage stability.SOLUTION: Inorganic coated sand comprises a metasilicate hydrate layer (C) that is formed on: reconditioned sand (A) comprising r...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide inorganic coated sand that is made using reconditioned sand or refractory aggregate with a high degree of amorphousness and exhibits improved storage stability.SOLUTION: Inorganic coated sand comprises a metasilicate hydrate layer (C) that is formed on: reconditioned sand (A) comprising refractory aggregate and an inorganic binder layer (a) formed on the refractory aggregate and comprising at least one selected from silicates and reaction products of silicates; and/or refractory aggregate (B) with a degree of amorphousness of at least 20% or more. The metasilicate hydrate layer (C) comprises at least one selected from zinc oxide, aluminum hydroxide, and tin oxide.SELECTED DRAWING: None
【課題】再生砂もしくは非晶化度の高い耐火性骨材を用いて作製された無機コーテッドサンドの保存安定性を向上できる無機コーテッドサンドを提供する。【解決手段】無機コーテッドサンドは、耐火性骨材と、当該耐火性骨材の表面に形成され、ケイ酸塩およびケイ酸塩の反応物の中から選ばれる１種以上を含む無機粘結剤層（ａ）と、を有する再生砂（Ａ）、および／または、非晶化度が少なくとも２０％以上である耐火性骨材（Ｂ）の表面にメタケイ酸塩水和物層（Ｃ）を有し、前記メタケイ酸塩水和物層（Ｃ）が酸化亜鉛、水酸化アルミニウム、および酸化錫の中から選ばれる１種以上を含有する。【選択図】なし |
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