1000℃における北朝鮮産カオリンのムライト化反応に及ぼす数種の鉱化剤の効果

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数種の鉱化剤を添加した北朝鮮産カオリンのムライト生成機構について研究を行った。LiF, Li2CO3, MgF2, MgO, CuF2 及びCuO各20mol%を含んだ棒状試料を1000℃で90日間焼成し、ムライト生成率はＸ線回折法により決定した。ムライト生成率(%)はおのおの無添加の場合8.7, Li2CO3で16.5, LiFで18, 10mol% Li2CO3で19.7, MgF2で20.7, MgOで22.5, CuF2で27.7及びCuOで29.3であった。そして全ての反応曲線はTammann式に行い、ムライト生成率は時間の対数に対して直線的に増加し、時間teで飽和値αeに達する。Effect of additives on the mullite formation reactions of North Korea kaolin was studied. Knead-formed samples containing 20mol% of Lif, Li2CO3, MgF2, MgO, CuF2 and CuO were heated at 1000℃ up to 90 days and the amount of mullite formed was determine dby X-ray diffractometry. Mullite yields (%) were as follows: without additives 8.7; when Li2CO3 was added, 16.5; LiF, 18; Li2CO3(10mol%), 19.7; MgF2, 20.7; MgO, 22.5; CuF2, 27.7 and CuO, 29.3. It has been deduced that all the reaction rate curves obtained follow the Tammann's equation, where the mullite yield increases linearly with logarithm of time and reaches to a constant value αe at a time te.
1982-08-01